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CN112833416B - Air separation energy storage coupling oxygen-enriched combustion carbon capture integrated system and method for thermal power plant - Google Patents

Air separation energy storage coupling oxygen-enriched combustion carbon capture integrated system and method for thermal power plant Download PDF

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CN112833416B
CN112833416B CN202110064853.1A CN202110064853A CN112833416B CN 112833416 B CN112833416 B CN 112833416B CN 202110064853 A CN202110064853 A CN 202110064853A CN 112833416 B CN112833416 B CN 112833416B
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explosion
oxygen
air separation
proof
outlet
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CN112833416A (en
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姬海民
薛宁
徐党旗
敬小磊
张知翔
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/007—Supplying oxygen or oxygen-enriched air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F01K25/103—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • F25J3/04133—Electrical motor as the prime mechanical driver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/044—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a single pressure main column system only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04533—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the direct combustion of fuels in a power plant, so-called "oxyfuel combustion"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04836—Variable air feed, i.e. "load" or product demand during specified periods, e.g. during periods with high respectively low power costs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/40—Air or oxygen enriched air, i.e. generally less than 30mol% of O2
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/70—Steam turbine, e.g. used in a Rankine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
    • F25J2260/80—Integration in an installation using carbon dioxide, e.g. for EOR, sequestration, refrigeration etc.
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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Abstract

本发明公开了火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统及方法，锅炉连接透平，透平连接发电机；发电机的输出端分为两路，一路能够与电网连接，一路与空分装置连接；空分装置与氧气储存罐以及防爆增压风机连接，空分装置与氧气储存罐的连接管路上以及空分装置与防爆增压风机连接的管路上分别设有第一防爆调节阀和第二防爆调节阀，氧气储存罐的出口与防爆增压风机连接且连接管路上设有第三防爆调节阀；送风机锅炉的氧气入口连接，防爆增压风机的出口与送风机出口连通；烟气处理系统与锅炉的烟气出口连接，尾气分离回收系统与烟气处理系统出口连接。本发明结构简单，即解决了深度调峰，又实现了碳减排且效果佳，整体经济效益较好。

Figure 202110064853

The invention discloses an integrated system and method for air separation energy storage coupled with oxygen-enriched combustion and carbon capture in a thermal power plant. The boiler is connected to a turbine, and the turbine is connected to a generator; the output end of the generator is divided into two circuits, one of which can be connected to the power grid. , one way is connected with the air separation unit; the air separation unit is connected with the oxygen storage tank and the explosion-proof booster fan, and the connecting pipeline between the air separation unit and the oxygen storage tank and the pipeline connecting the air separation unit and the explosion-proof booster fan are respectively provided with the first An explosion-proof regulating valve and a second explosion-proof regulating valve, the outlet of the oxygen storage tank is connected to the explosion-proof booster fan and the connecting pipeline is provided with a third explosion-proof regulating valve; the oxygen inlet of the blower boiler is connected, the outlet of the explosion-proof booster fan is connected to the outlet of the blower Connected; the flue gas treatment system is connected to the flue gas outlet of the boiler, and the tail gas separation and recovery system is connected to the outlet of the flue gas treatment system. The invention has a simple structure, not only solves deep peak regulation, but also realizes carbon emission reduction with good effect and good overall economic benefit.

Figure 202110064853

Description

火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统及方法Thermal Power Plant Air Separation Energy Storage Coupling Oxygen-enriched Combustion Carbon Capture Integrated Integrated System and Method

技术领域technical field

本发明属于火电厂深度调峰领域，涉及火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统及方法。The invention belongs to the field of deep peak regulation in thermal power plants, and relates to an integrated system and method for air separation energy storage coupled with oxygen-enriched combustion and carbon capture in thermal power plants.

背景技术Background technique

针对目前提出碳减排的重点政策要求，而火电机组是最重要控制碳排放的对象，利用传统技术已经不能实现碳减排。随着近几年国家电力政策的变化，火电厂主要职能也同时发生转变，由供电主力转变为参与配合电网进行深度调峰。同时国家出台深度调峰电价补贴政策，大大刺激火电厂进行机组深度调峰改造的积极性。当前火电面临产能结构性过剩的风险，新能源面临极大的消纳压力。火电势必为了给新能源发展让路。火电机组面临着深度调峰。对于“三北”地区来说，供暖期的风火矛盾尤为突出，风力资源最好的时期正值冬季供暖期，加之部分省区热电机组占比过高、其他类别调峰电源相对匮乏，不断增长的供热需求和持续增加的清洁能源装机，造成调峰空间非常有限。特别是东北地区，火电绝大部分为热电联产机组，调峰能力仅为10％，影响新能源存量消纳和新能源增量发展，调峰容量的硬缺口造成部分区域新能源限电严重，致使热电机组唯有通过改造实现深度调峰。In response to the current key policy requirements for carbon emission reduction, and thermal power units are the most important object of carbon emission control, carbon emission reduction can no longer be achieved by using traditional technologies. With the changes in the national power policy in recent years, the main functions of thermal power plants have also changed at the same time, from the main force of power supply to participating in deep peak regulation in cooperation with the power grid. At the same time, the state has issued a deep peak-shaving electricity price subsidy policy, which has greatly stimulated the enthusiasm of thermal power plants to carry out deep peak-shaving transformation of units. At present, thermal power is facing the risk of structural overcapacity, and new energy is facing great consumption pressure. Thermal power is bound to make way for the development of new energy. Thermal power units are facing deep peak regulation. For the "Three Norths" region, the contradiction between wind and fire is particularly prominent during the heating period. The period of the best wind resources coincides with the winter heating period. In addition, the proportion of thermal power units in some provinces is too high, and other types of peak-shaving power sources are relatively scarce. The increasing demand for heat supply and the continuous increase in installed capacity of clean energy have resulted in very limited peak-shaving space. Especially in Northeast China, the majority of thermal power is combined heat and power units, and the peak-shaving capacity is only 10%, which affects the consumption of new energy stocks and the incremental development of new energy. The hard gap in peak-shaving capacity has caused severe power shortages in some areas. , so that the thermal power unit can only achieve deep peak regulation through transformation.

目前，参与深度调峰的机组长时间偏离设计值运行，造成机组安全性经济性下降。而目前兼顾火电机组深度调峰及碳减排的技术路线还在探索阶段，未提出一条经济可行的技术路线。At present, the units involved in deep peak shaving deviate from the design value for a long time, resulting in a decline in the safety and economy of the units. At present, the technical route that takes into account the deep peak shaving and carbon emission reduction of thermal power units is still in the exploration stage, and no economically feasible technical route has been proposed.

发明内容Contents of the invention

本发明的目的在于克服上述现有技术的缺点，提供了火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统及方法，该系统及方法能够满足火电厂机组灵活深度调峰的要求，又实现了碳减排且效果佳，且具有安全性、经济性较高的特点。The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide an integrated system and method for air separation energy storage coupled with oxygen-enriched combustion and carbon capture in thermal power plants. The system and method can meet the requirements of flexible and deep peak regulation of thermal power plant units , and achieved carbon emission reduction with good effect, and has the characteristics of high safety and economy.

本发明采用的技术方案如下：The technical scheme that the present invention adopts is as follows:

火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统，包括锅炉、透平、发电机、空分装置、氧气储存罐、防爆增压风机、送风机、烟气处理系统和尾气分离回收系统，锅炉连接透平，透平连接发电机；发电机的输出端分为两路，一路能够与电网连接，一路与空分装置连接；空分装置与氧气储存罐以及防爆增压风机连接，空分装置与氧气储存罐的连接管路上以及空分装置与防爆增压风机连接的管路上分别设有第一防爆调节阀和第二防爆调节阀，氧气储存罐的出口与防爆增压风机连接且连接管路上设有第三防爆调节阀；送风机锅炉的氧气入口连接，防爆增压风机的出口与送风机出口连通；烟气处理系统与锅炉的烟气出口连接，尾气分离回收系统与烟气处理系统出口连接，尾气分离回收系统还与发电机连接。Thermal power plant air separation energy storage coupled with oxygen-enriched combustion carbon capture integrated integrated system, including boilers, turbines, generators, air separation units, oxygen storage tanks, explosion-proof booster fans, blowers, flue gas treatment systems and tail gas separation and recovery system, the boiler is connected to the turbine, and the turbine is connected to the generator; the output of the generator is divided into two circuits, one can be connected to the grid, and the other is connected to the air separation unit; the air separation unit is connected to the oxygen storage tank and the explosion-proof booster fan, A first explosion-proof regulating valve and a second explosion-proof regulating valve are respectively arranged on the connecting pipeline between the air separation unit and the oxygen storage tank and the pipeline connecting the air separation unit and the explosion-proof booster fan, and the outlet of the oxygen storage tank is connected to the explosion-proof booster fan And there is a third explosion-proof regulating valve on the connecting pipeline; the oxygen inlet of the blower boiler is connected, the outlet of the explosion-proof booster fan is connected with the outlet of the blower; the flue gas treatment system is connected with the flue gas outlet of the boiler, and the tail gas separation and recovery system is connected with the flue gas treatment The outlet of the system is connected, and the exhaust gas separation and recovery system is also connected with the generator.

优选的，发电机输出端能够与电网连接的一路线路上设有第一逆变器和第一电源开关。Preferably, a first inverter and a first power switch are provided on a line that can be connected to the power grid at the output end of the generator.

优选的，发电机与空分装置连接的线路上设有第二逆变器和第二电源开关。Preferably, a second inverter and a second power switch are provided on the line connecting the generator to the air separation unit.

优选的，氧气储存罐的出口还设有与氧气用户连接的管路，该管路上设有第四防爆调节阀。Preferably, the outlet of the oxygen storage tank is also provided with a pipeline connected to an oxygen user, and a fourth explosion-proof regulating valve is provided on the pipeline.

优选的，空分装置还连接有氮气储存罐，空分装置与氮气储存罐连接的管路上设有第五防爆调节阀。Preferably, the air separation unit is also connected with a nitrogen storage tank, and a fifth explosion-proof regulating valve is arranged on the pipeline connecting the air separation unit with the nitrogen storage tank.

优选的，氮气储存罐的出口设有与氮气用户连接的管路，该管路上设有第六防爆调节阀。Preferably, the outlet of the nitrogen storage tank is provided with a pipeline connected to a nitrogen user, and a sixth explosion-proof regulating valve is provided on the pipeline.

优选的，烟气处理系统包括冷凝器、除尘装置和一体化污染物脱除装置，冷凝器入口与锅炉的烟气出口连接，除尘装置入口与冷凝器气体出口连接，除尘装置气体出口与一体化污染物脱除装置气体入口连接。Preferably, the flue gas treatment system includes a condenser, a dust removal device and an integrated pollutant removal device, the inlet of the condenser is connected to the flue gas outlet of the boiler, the inlet of the dust removal device is connected to the gas outlet of the condenser, and the gas outlet of the dust removal device is integrated with Pollutant removal unit gas inlet connection.

优选的，空分装置包括空气压缩机、换热器、膨胀机和第一低温蒸馏塔，空气压缩机域换热器连接，换热器与膨胀机连接，膨胀机和第一低温蒸馏塔连接，空气压缩机还与发电机连接，第一低温蒸馏塔的氮气出口与氮气储存罐连接。Preferably, the air separation unit includes an air compressor, a heat exchanger, an expander and a first low-temperature distillation tower, the air compressor is connected to a heat exchanger, the heat exchanger is connected to an expander, and the expander is connected to the first low-temperature distillation tower , the air compressor is also connected with the generator, and the nitrogen outlet of the first cryogenic distillation tower is connected with the nitrogen storage tank.

优选的，尾气分离回收系统包括CO2压缩机和第二低温蒸馏塔，第二低温蒸馏塔的入口与一体化污染物脱除装置气体出口连接，第二低温蒸馏塔具有氮气出口和CO2出口，第二低温蒸馏塔的氮气出口与氮气储存罐连接第二低温蒸馏塔的CO2出口与CO2压缩机入口连接，CO2压缩机还分别与发电机和膨胀机连接。Preferably, the tail gas separation and recovery system includes a CO compressor and a second low-temperature distillation tower, the inlet of the second low-temperature distillation tower is connected to the gas outlet of the integrated pollutant removal device, and the second low-temperature distillation tower has a nitrogen outlet and a CO outlet , the nitrogen outlet of the second low-temperature distillation tower is connected to the nitrogen storage tank, and the CO2 outlet of the second low-temperature distillation tower is connected to the inlet of the CO2 compressor, and the CO2 compressor is also connected to the generator and the expander respectively.

本发明还提供了火电厂空分储能耦合富氧燃烧碳捕集一体化方法，该方法通过本发明如上所述的火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统实施，包括如下过程：The present invention also provides an integrated method for thermal power plant air separation energy storage coupled with oxygen-enriched combustion carbon capture, the method is implemented by the thermal power plant air separation energy storage coupled with oxygen-enriched combustion carbon capture integrated system as described above, Including the following process:

将发电机的输出端与电网连接；Connect the output of the generator to the grid;

当火电机组需要深度调峰时，使空分装置工作，打开第一防爆调节阀及第二防爆调节阀，空分装置得到的氧气一部分储存在氧气储存罐中，另一部分送入到防爆增压风机入口；通过防爆增压风机对氧气增压后在送风机出口混合，一起送入到锅炉进行富养燃烧；When the thermal power unit needs deep peak regulation, make the air separation unit work, open the first explosion-proof regulating valve and the second explosion-proof regulating valve, part of the oxygen obtained by the air separation unit is stored in the oxygen storage tank, and the other part is sent to the explosion-proof booster The inlet of the fan; the oxygen is pressurized by the explosion-proof booster fan and mixed at the outlet of the blower, and then sent to the boiler for eutrophic combustion;

当火电机组发电供电需求增加时，空分装置停止工作，关闭第一防爆调节阀及第二防爆调节阀，打开第三防爆调节阀，氧气储存罐中的氧气送入防爆增压风机入口；通过防爆增压风机对氧气增压后在送风机出口混合，一起送入到锅炉进行富养燃烧；When the thermal power generation power supply demand increases, the air separation unit stops working, closes the first explosion-proof regulating valve and the second explosion-proof regulating valve, opens the third explosion-proof regulating valve, and the oxygen in the oxygen storage tank is sent to the explosion-proof booster fan inlet; The explosion-proof booster fan pressurizes the oxygen and mixes it at the outlet of the blower, and sends it to the boiler for eutrophic combustion;

锅炉工作过程中，锅炉的尾气经烟气处理系统净化除杂后得到纯净的CO2与氮气的混合气体，纯净的CO2与氮气的混合气体经尾气分离回收系统进行分离、回收。During the working process of the boiler, the exhaust gas of the boiler is purified and removed by the flue gas treatment system to obtain a pure mixed gas of CO 2 and nitrogen, and the pure mixed gas of CO 2 and nitrogen is separated and recovered by the tail gas separation and recovery system.

优选的，本发明火电厂空分储能耦合富氧燃烧碳捕集一体化方法还包括将氧气储存罐中储存的多余的氧气供给氧气客户的过程；Preferably, the integrated method of air separation energy storage coupled with oxygen-enriched combustion and carbon capture in thermal power plants of the present invention also includes the process of supplying excess oxygen stored in the oxygen storage tank to oxygen customers;

还包括空分装置分离出氮气，将分离出的氮气供氮气用户使用的过程。It also includes the process of separating nitrogen from the air separation unit and supplying the separated nitrogen to nitrogen users.

优选的，当火电机组需要深度调峰时，空气压缩机将空气进行压缩后并利用换热器进行换热，使得压缩空气温度达到膨胀机的工作温度，膨胀机将压缩空气送入第一低温蒸馏塔，第一低温蒸馏塔从空气中分离出氧气和氮气，氮气进入氮气储存罐；膨胀机驱动CO2压缩机进行工作；第二低温蒸馏塔将分离出的氮气送入氮气储存罐，将分离出的CO2送入CO2压缩机进行压缩、回收；Preferably, when the thermal power unit needs deep peak regulation, the air compressor compresses the air and uses a heat exchanger for heat exchange, so that the temperature of the compressed air reaches the operating temperature of the expander, and the expander sends the compressed air into the first low temperature Distillation tower, the first low-temperature distillation tower separates oxygen and nitrogen from the air, and the nitrogen enters the nitrogen storage tank; the expander drives the CO2 compressor to work; the second low-temperature distillation tower sends the separated nitrogen into the nitrogen storage tank, and the The separated CO 2 is sent to the CO 2 compressor for compression and recovery;

当火电机组发电供电需求增加时，膨胀机停止驱动CO2压缩机进行工作，发电机驱动CO2压缩机进行工作；第二低温蒸馏塔将分离出的氮气送入氮气储存罐，将分离出的CO2送入CO2压缩机进行压缩、回收。When the thermal power generation power supply demand increases, the expander stops driving the CO2 compressor to work, and the generator drives the CO2 compressor to work; the second low-temperature distillation tower sends the separated nitrogen into the nitrogen storage tank, and the separated CO 2 is sent to the CO 2 compressor for compression and recovery.

本发明具有如下有益效果：The present invention has following beneficial effects:

本发明火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统通过设置空分装置，当机组需要进行深度调峰时，将部分发电量通过空分装置消纳，利用空分装置能够对空气进行分离，得到产生实用价值高的氧气，通过设置氧气储存罐能够将得到的一部分氧气储存起来，通过设置防爆增压风机和送风机，能够将空分装置分离得到的一部分样气送入锅炉进行富氧燃烧，提高锅炉效率，减少污染物排放，减少碳排放，整体经济效益较。当机组需要发电量时，可控制空分装置停止工作，此时可将氧气储罐中储存的氧气通过防爆增压风机和送风机送入锅炉进行富氧燃烧，提高锅炉效率，减少污染物排放，减少碳排放，整体经济效益较。综上，本发明的火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统无论是在深度调峰还是需要发电量时，锅炉均能够进行富氧燃烧，提高了燃料的利用率和锅炉的效率。此外，通过烟气处理系统和尾气分离回收系统能够净化锅炉烟气以及对锅炉烟气中的氮气和CO2进行回收，使得燃烧产生的CO2得以捕集封存，减少碳排放，同时将燃烧时由空气中带入的氮气一并进行回收、可以用作他用，提高了能源的利用率和减少资源的浪费。综上所述，本发明火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统能提高锅炉效率，减少污染物排放，减少碳排放，且具有系统简单、能量利用效率高、深度调峰潜力大、碳减排及捕集效果好的特点，同时安全性及经济性较高。The air separation energy storage coupled with oxygen-enriched combustion and carbon capture integrated system of the thermal power plant of the present invention sets up an air separation device, and when the unit needs to perform deep peak regulation, part of the power generation is absorbed by the air separation device, and the air separation device can be used The air is separated to produce oxygen with high practical value. By setting up an oxygen storage tank, a part of the obtained oxygen can be stored. By setting up an explosion-proof booster fan and a blower, a part of the sample gas separated by the air separation unit can be sent to the boiler. Carry out oxygen-enriched combustion, improve boiler efficiency, reduce pollutant emissions, reduce carbon emissions, and the overall economic benefits are relatively high. When the unit needs power generation, the air separation unit can be controlled to stop working. At this time, the oxygen stored in the oxygen storage tank can be sent to the boiler through the explosion-proof booster fan and blower for oxygen-enriched combustion, which improves boiler efficiency and reduces pollutant emissions. Reduce carbon emissions, and the overall economic benefits are higher. To sum up, the integrated system of air separation energy storage coupled with oxygen-enriched combustion and carbon capture in thermal power plants of the present invention enables boilers to perform oxygen-enriched combustion, which improves fuel utilization and boiler efficiency. In addition, the boiler flue gas can be purified and the nitrogen and CO 2 in the boiler flue gas can be recovered through the flue gas treatment system and the tail gas separation and recovery system, so that the CO 2 generated by combustion can be captured and stored, reducing carbon emissions, and at the same time reducing the combustion time The nitrogen brought in from the air is recovered and used for other purposes, which improves the utilization rate of energy and reduces the waste of resources. In summary, the air separation energy storage coupled with oxygen-enriched combustion carbon capture integrated system of thermal power plants of the present invention can improve boiler efficiency, reduce pollutant emissions, reduce carbon emissions, and has the advantages of simple system, high energy utilization efficiency, deep regulation It has the characteristics of high peak potential, good carbon emission reduction and capture effect, and high safety and economy.

本发明火电厂空分储能耦合富氧燃烧碳捕集一体化方法能够使得锅炉在火电机组需要深度调峰时以及火电机组发电供电需求增加时均能够进行富氧燃烧，因此提高了锅炉效率，减少污染物排放，同时对烟气中的CO2进行回收，减少了碳排放，同时将燃烧时由空气中带入的氮气一并进行回收、可以用作他用，提高能源的利用率，整体经济效益较好。The integrated method of air separation energy storage coupled with oxygen-enriched combustion and carbon capture in a thermal power plant of the present invention can enable the boiler to perform oxygen-enriched combustion when the thermal power unit needs deep peak regulation and when the demand for power generation and power supply of the thermal power unit increases, thereby improving boiler efficiency. Reduce pollutant emissions, and at the same time recover the CO 2 in the flue gas, reducing carbon emissions, and at the same time recover the nitrogen brought in from the air during combustion, which can be used for other purposes, improve energy utilization, and overall The economic benefit is better.

附图说明Description of drawings

图1为本发明火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统的结构示意图。Fig. 1 is a schematic structural diagram of an integrated system of air separation energy storage coupled with oxygen-enriched combustion and carbon capture in a thermal power plant according to the present invention.

图2为本发明空分装置的结构示意图。Figure 2 is a schematic structural view of the air separation plant of the present invention.

其中，1为锅炉、2为透平、3为发电机、4为第一逆变器、5为第一电源开关、6为电网、7为第二逆变器、8为第二电源开关、9为空分装置、10为氮气储存罐、11为氧气储存罐、12为防爆增压风机、13为送风机、14为冷凝器、15为除尘装置、16为一体化污染物脱除装置、17为CO2压缩机、18为第五防爆调节阀、19为第六防爆调节阀、20为第一防爆调节阀、21为第四防爆调节阀、22为第三防爆调节阀、23为第二防爆调节阀、24为空气低压压缩机、25为低温换热器、26为空气高压压缩机、27为高温换热器、28为膨胀机、29为第一低温蒸馏塔、30为第二低温蒸馏塔。Among them, 1 is the boiler, 2 is the turbine, 3 is the generator, 4 is the first inverter, 5 is the first power switch, 6 is the grid, 7 is the second inverter, 8 is the second power switch, 9 is an air separation unit, 10 is a nitrogen storage tank, 11 is an oxygen storage tank, 12 is an explosion-proof booster fan, 13 is a blower fan, 14 is a condenser, 15 is a dust removal device, 16 is an integrated pollutant removal device, 17 18 is the fifth explosion-proof regulating valve, 19 is the sixth explosion-proof regulating valve, 20 is the first explosion-proof regulating valve, 21 is the fourth explosion-proof regulating valve, 22 is the third explosion-proof regulating valve, 23 is the second Explosion-proof regulating valve, 24 is the air low pressure compressor, 25 is the low temperature heat exchanger, 26 is the air high pressure compressor, 27 is the high temperature heat exchanger, 28 is the expander, 29 is the first low temperature distillation tower, 30 is the second low temperature distillation tower.

具体实施方式Detailed ways

下面结合附图和实施例来对本发明做进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

参照图1，本发明火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统，包括锅炉1、透平2、发电机3、空分装置9、氧气储存罐11、防爆增压风机12、送风机13、烟气处理系统和尾气分离回收系统，锅炉1连接透平2，透平2连接发电机3；发电机3的输出端分为两路，一路能够与电网6连接，一路与空分装置9连接；空分装置9与氧气储存罐11以及防爆增压风机12连接，空分装置9与氧气储存罐11的连接管路上以及空分装置9与防爆增压风机12连接的管路上分别设有第一防爆调节阀20和第二防爆调节阀23，氧气储存罐11的出口与防爆增压风机12连接且连接管路上设有第三防爆调节阀22；送风机13锅炉1的氧气入口连接，防爆增压风机12的出口与送风机13出口连通；烟气处理系统与锅炉1的烟气出口连接，尾气分离回收系统与烟气处理系统出口连接，尾气分离回收系统还与发电机3连接。Referring to Fig. 1, the integrated system of air separation energy storage coupled with oxygen-enriched combustion and carbon capture in a thermal power plant of the present invention includes a boiler 1, a turbine 2, a generator 3, an air separation unit 9, an oxygen storage tank 11, and an explosion-proof booster fan 12. Air blower 13, flue gas treatment system and exhaust gas separation and recovery system. Boiler 1 is connected to turbine 2, and turbine 2 is connected to generator 3; The air separation unit 9 is connected; the air separation unit 9 is connected with the oxygen storage tank 11 and the explosion-proof booster blower 12, and the connection pipeline between the air separation unit 9 and the oxygen storage tank 11 and the pipe connecting the air separation unit 9 and the explosion-proof booster fan 12 The first explosion-proof regulating valve 20 and the second explosion-proof regulating valve 23 are respectively arranged on the road, the outlet of the oxygen storage tank 11 is connected with the explosion-proof booster fan 12 and the third explosion-proof regulating valve 22 is arranged on the connecting pipeline; The inlet is connected, the outlet of the explosion-proof booster fan 12 is connected with the outlet of the blower 13; the flue gas treatment system is connected with the flue gas outlet of the boiler 1, the exhaust gas separation and recovery system is connected with the outlet of the flue gas treatment system, and the exhaust gas separation and recovery system is also connected with the generator 3 connect.

作为本发明优选的实施方案，发电机3输出端能够与电网6连接的一路线路上设有第一逆变器4和第一电源开关5，通过第一电源开关5能够控制发电机3与电网6之间的通/断路。As a preferred embodiment of the present invention, a first inverter 4 and a first power switch 5 are provided on a line where the output end of the generator 3 can be connected to the grid 6, and the generator 3 and the grid can be controlled by the first power switch 5. 6 on/off circuit between.

作为本发明优选的实施方案，发电机3与空分装置9连接的线路上设有第二逆变器7和第二电源开关8，通过第二逆变器7和第二电源开关8能够实现发电机3对空分装置9的供电，使得空分装置9工作，不用对空分装置9额外提供电源，通过第二电源开关8能够控制发电机3与空分装置9之间的通/断路，在需要空分装置9工作时让其工作，不需要工作时停止工作。As a preferred embodiment of the present invention, a second inverter 7 and a second power switch 8 are provided on the line connecting the generator 3 and the air separation unit 9, and the second inverter 7 and the second power switch 8 can realize The power supply of the generator 3 to the air separation unit 9 makes the air separation unit 9 work without additional power supply to the air separation unit 9, and the on/off circuit between the generator 3 and the air separation unit 9 can be controlled by the second power switch 8 , let it work when needing air separation unit 9 work, stop working when not needing work.

作为本发明优选的实施方案，氧气储存罐11的出口还设有与氧气用户连接的管路，该管路上设有第四防爆调节阀21，通过该管路和第四防爆调节阀21能够将氧气储存罐11中储存的多余的氧气进行合理利用，节约成本并能创造一定的经济效益。As a preferred embodiment of the present invention, the outlet of the oxygen storage tank 11 is also provided with a pipeline connected to an oxygen user, and the pipeline is provided with a fourth explosion-proof regulating valve 21, and the pipeline and the fourth explosion-proof regulating valve 21 can The excess oxygen stored in the oxygen storage tank 11 is rationally utilized to save costs and create certain economic benefits.

作为本发明优选的实施方案，空分装置9还连接有氮气储存罐10，空分装置9与氮气储存罐10连接的管路上设有第五防爆调节阀18，利用氮气储存罐10还能够将空分装置9分离出的氮气进行储存，然后进行利用或出售，也能够节约成本并能创造一些经济效益。As a preferred embodiment of the present invention, air separation unit 9 is also connected with nitrogen storage tank 10, and the pipeline that air separation unit 9 is connected with nitrogen storage tank 10 is provided with the fifth explosion-proof regulating valve 18, utilizes nitrogen storage tank 10 to also be able to The nitrogen separated by the air separation unit 9 is stored and then utilized or sold, which can also save costs and create some economic benefits.

作为本发明优选的实施方案，氮气储存罐10的出口设有与氮气用户连接的管路，该管路上设有第六防爆调节阀19，因此能够将氮气储存罐10中的氮气直接提供给氮气用户，创造一定的经济效益。As a preferred embodiment of the present invention, the outlet of the nitrogen storage tank 10 is provided with a pipeline connected to the nitrogen user, and the sixth explosion-proof regulating valve 19 is arranged on the pipeline, so the nitrogen in the nitrogen storage tank 10 can be directly provided to the nitrogen gas. users and create certain economic benefits.

作为本发明优选的实施方案，烟气处理系统包括冷凝器14、除尘装置15和一体化污染物脱除装置16，冷凝器14入口与锅炉1的烟气出口连接，除尘装置15入口与冷凝器14气体出口连接，除尘装置15气体出口与一体化污染物脱除装置16气体入口连接；通过冷凝器14能够将锅炉烟气中的水气分离并对烟气进行降温，通过除尘装置15能够将降温后的烟气中颗粒物进行去除，一体化污染物脱除装置能够将除尘后的烟气中水分、灰尘及污染物脱除，得到纯净的CO2，尾气分离回收系统能够将分离处理得到的纯净CO2进行回收，用作他用，实现了CO2的减排，同时回收的纯净CO2还能够进一步产生一定的经济效益，变害为宝。As a preferred embodiment of the present invention, the flue gas treatment system includes a condenser 14, a dust removal device 15 and an integrated pollutant removal device 16, the inlet of the condenser 14 is connected with the flue gas outlet of the boiler 1, and the inlet of the dust removal device 15 is connected with the condenser 14 is connected to the gas outlet, and the gas outlet of the dust removal device 15 is connected to the gas inlet of the integrated pollutant removal device 16; The particles in the cooled flue gas are removed. The integrated pollutant removal device can remove the moisture, dust and pollutants in the flue gas after dust removal to obtain pure CO 2 . The tail gas separation and recovery system can process the separated The pure CO 2 is recovered and used for other purposes, which realizes the reduction of CO 2 emissions. At the same time, the recovered pure CO 2 can further generate certain economic benefits, turning harm into wealth.

作为本发明优选的实施方案，空分装置9包括空气压缩机、换热器、膨胀机28和第一低温蒸馏塔29，空气压缩机域换热器连接，换热器与膨胀机28连接，膨胀机28和第一低温蒸馏塔29连接，空气压缩机还与发电机3连接，第一低温蒸馏塔29的氮气出口与氮气储存罐10连接。As a preferred embodiment of the present invention, the air separation unit 9 includes an air compressor, a heat exchanger, an expander 28 and a first cryogenic distillation column 29, the air compressor is connected to the heat exchanger, and the heat exchanger is connected to the expander 28, The expander 28 is connected to the first low-temperature distillation tower 29 , the air compressor is also connected to the generator 3 , and the nitrogen outlet of the first low-temperature distillation tower 29 is connected to the nitrogen storage tank 10 .

作为本发明优选的实施方案，所述空分装置9中可设置多级空气压缩机和换热器，以两级空气压缩机和换热器为例进行说明，两级空气压缩机和换热器中，包括空气低压压缩24、低温换热器25、空气高压压缩26和高温换热器27，空气低压压缩24、低温换热器25、空气高压压缩26和高温换热器27依次连接，高温换热器27与膨胀机28连接，低温蒸馏塔29上设置气体出口，空气低压压缩24和空气高压压缩26均与发电机3连接。通过设置低温换热器25和温换热器27既能够实现对压缩空气的降温，使得压缩空气的温度满足膨胀机的工作要求，同时还能够通过低温换热器25和温换热器27中的冷媒将压缩空气中的热能进行回收利用，实现节能减排、以及能源的有效利用。As a preferred embodiment of the present invention, multi-stage air compressors and heat exchangers can be arranged in the air separation unit 9, and two-stage air compressors and heat exchangers are used as examples for illustration. Two-stage air compressors and heat exchangers In the device, including low-pressure air compression 24, low-temperature heat exchanger 25, high-pressure air compression 26 and high-temperature heat exchanger 27, low-pressure air compression 24, low-temperature heat exchanger 25, high-pressure air compression 26 and high-temperature heat exchanger 27 are connected in sequence, The high-temperature heat exchanger 27 is connected to the expander 28 , the gas outlet is provided on the low-temperature distillation tower 29 , and the low-pressure air compressor 24 and the high-pressure air compressor 26 are both connected to the generator 3 . By setting the low-temperature heat exchanger 25 and the warm heat exchanger 27, the temperature of the compressed air can be lowered so that the temperature of the compressed air can meet the working requirements of the expander. The refrigerant recycles the heat energy in the compressed air to achieve energy saving and emission reduction, as well as the effective use of energy.

作为本发明优选的实施方案，尾气分离回收系统包括CO2压缩机17和第二低温蒸馏塔30，第二低温蒸馏塔30的入口与一体化污染物脱除装置16气体出口连接，第二低温蒸馏塔30具有氮气出口和CO2出口，第二低温蒸馏塔30的氮气出口与氮气储存罐10连接第二低温蒸馏塔30的CO2出口与CO2压缩机17入口连接，CO2压缩机17还分别与发电机3和膨胀机28连接。As a preferred embodiment of the present invention, the tail gas separation and recovery system includes a CO compressor 17 and a second low-temperature distillation tower 30, the inlet of the second low-temperature distillation tower 30 is connected with the integrated pollutant removal device 16 gas outlets, and the second low-temperature distillation tower 30 is connected to the gas outlet of the integrated pollutant removal device 16. The distillation tower 30 has a nitrogen outlet and a CO outlet, and the nitrogen outlet of the second cryogenic distillation tower 30 is connected with the nitrogen storage tank 10. The CO outlet of the second cryogenic distillation tower 30 is connected with the CO compressor 17 inlet, and the CO compressor 17 It is also connected with the generator 3 and the expander 28 respectively.

本发明还提供了火电厂空分储能耦合富氧燃烧碳捕集一体化方法，该方法通过本发明如上所述的火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统实施，包括如下过程：The present invention also provides an integrated method for thermal power plant air separation energy storage coupled with oxygen-enriched combustion carbon capture, the method is implemented by the thermal power plant air separation energy storage coupled with oxygen-enriched combustion carbon capture integrated system as described above, Including the following process:

将发电机3的输出端与电网连接；The output end of generator 3 is connected with grid;

当火电机组需要深度调峰时，使空分装置9工作，打开第一防爆调节阀20及第二防爆调节阀23，空分装置9得到的氧气一部分储存在氧气储存罐11中，另一部分送入到防爆增压风机12入口；通过防爆增压风机12对氧气增压后在送风机13出口混合，一起送入到锅炉1进行富养燃烧；When the thermal power unit needs deep peak regulation, make the air separation unit 9 work, open the first explosion-proof regulating valve 20 and the second explosion-proof regulating valve 23, a part of the oxygen obtained by the air separation unit 9 is stored in the oxygen storage tank 11, and the other part is sent to the oxygen storage tank 11. into the entrance of the explosion-proof booster fan 12; the oxygen is pressurized by the explosion-proof booster fan 12 and then mixed at the outlet of the blower 13, and sent to the boiler 1 together for nutrient-rich combustion;

当火电机组发电供电需求增加时，空分装置9停止工作，关闭第一防爆调节阀20及第二防爆调节阀23，打开第三防爆调节阀22，氧气储存罐11中的氧气送入防爆增压风机12入口；通过防爆增压风机12对氧气增压后在送风机13出口混合，一起送入到锅炉1进行富养燃烧；When the thermal power generation power supply demand increased, the air separation unit 9 stopped working, closed the first explosion-proof regulating valve 20 and the second explosion-proof regulating valve 23, opened the third explosion-proof regulating valve 22, and the oxygen in the oxygen storage tank 11 was sent into the explosion-proof accumulator. The inlet of the compressor 12; the oxygen is pressurized by the explosion-proof booster fan 12, mixed at the outlet of the blower 13, and sent to the boiler 1 for nutrient-rich combustion;

锅炉1工作过程中，锅炉1的尾气经烟气处理系统净化除杂后得到纯净的CO2与氮气的混合气体，纯净的CO2与氮气的混合气体经尾气分离回收系统进行分离、回收。During the working process of boiler 1, the tail gas of boiler 1 is purified and removed by the flue gas treatment system to obtain pure mixed gas of CO 2 and nitrogen, and the mixed gas of pure CO 2 and nitrogen is separated and recovered by the tail gas separation and recovery system.

作为本发明优选的实施方案，当本发明中采用上述的空分装置9和尾气分离回收系统时，即空分装置9包括空气压缩机、换热器、膨胀机28和第一低温蒸馏塔29，空气压缩机域换热器连接，换热器与膨胀机28连接，膨胀机28和第一低温蒸馏塔29连接，第一低温蒸馏塔29的氮气出口与氮气储存罐10连接；尾气分离回收系统包括CO2压缩机17和第二低温蒸馏塔30，第二低温蒸馏塔30的入口与一体化污染物脱除装置16气体出口连接，第二低温蒸馏塔30具有氮气出口和CO2出口，第二低温蒸馏塔30的氮气出口与氮气储存罐10连接第二低温蒸馏塔30的CO2出口与CO2压缩机17入口连接，CO2压缩机17还分别与发电机3和膨胀机28连接；As a preferred embodiment of the present invention, when adopting above-mentioned air separation unit 9 and tail gas separation and recovery system in the present invention, promptly air separation unit 9 comprises air compressor, heat exchanger, expander 28 and first cryogenic distillation column 29 , the air compressor is connected to the heat exchanger, the heat exchanger is connected to the expander 28, the expander 28 is connected to the first low-temperature distillation tower 29, and the nitrogen outlet of the first low-temperature distillation tower 29 is connected to the nitrogen storage tank 10; tail gas separation and recovery The system comprises a CO compressor 17 and a second low-temperature distillation tower 30, the inlet of the second low-temperature distillation tower 30 is connected with the gas outlet of the integrated pollutant removal device 16, and the second low-temperature distillation tower 30 has a nitrogen gas outlet and a CO outlet, The nitrogen outlet of the second cryogenic distillation tower 30 is connected with the nitrogen storage tank 10 The CO outlet of the second cryogenic distillation tower 30 is connected with the CO compressor 17 inlet, and the CO compressor 17 is also connected with the generator 3 and the expander 28 respectively ;

当火电机组需要深度调峰时，空气压缩机将空气进行压缩后并利用换热器进行换热，使得压缩空气温度达到膨胀机28的工作温度，膨胀机28将压缩空气送入第一低温蒸馏塔29，第一低温蒸馏塔29从空气中分离出氧气和氮气，氮气进入氮气储存罐10；膨胀机28驱动CO2压缩机17进行工作；第二低温蒸馏塔30将分离出的氮气送入氮气储存罐10，将分离出的CO2送入CO2压缩机17进行压缩、回收。在该实施方案中，膨胀机可利用压缩空气中的热量进行对外做功驱动CO2压缩机17进行工作，这样能够将空分过程中多余的能量进行充分利用，能够进一步的节能降耗。When the thermal power unit needs deep peak regulation, the air compressor compresses the air and uses the heat exchanger to exchange heat, so that the temperature of the compressed air reaches the working temperature of the expander 28, and the expander 28 sends the compressed air to the first low-temperature distillation Tower 29, the first low-temperature distillation tower 29 separates oxygen and nitrogen from the air, and nitrogen enters the nitrogen storage tank 10; the expander 28 drives the CO compressor 17 to work; the second low-temperature distillation tower 30 sends the separated nitrogen into The nitrogen storage tank 10 sends the separated CO 2 to the CO 2 compressor 17 for compression and recovery. In this embodiment, the expander can use the heat in the compressed air to perform external work to drive the CO2 compressor 17 to work, so that the excess energy in the air separation process can be fully utilized, which can further save energy and reduce consumption.

当火电机组发电供电需求增加时，膨胀机28停止驱动CO2压缩机17进行工作，发电机3驱动CO2压缩机17进行工作；第二低温蒸馏塔30将分离出的氮气送入氮气储存罐10，将分离出的CO2送入CO2压缩机17进行压缩、回收。When the thermal power generation power supply demand increases, the expander 28 stops driving the CO2 compressor 17 to work, and the generator 3 drives the CO2 compressor 17 to work; the second cryogenic distillation tower 30 sends the separated nitrogen into the nitrogen storage tank 10. Send the separated CO 2 to the CO 2 compressor 17 for compression and recovery.

在上述实施方案中，通过设置第二低温蒸馏塔30能够将处理后的纯净的尾气中的CO2和氮气进行分离，得到的CO2可经CO2压缩机17压缩后补集利用，得到的氮气可被氮气储存罐10储存利用，因此本发明还能够将尾气中较高纯度的CO2和氮气进行补集和资源化利用，进一步减少了资源的浪费。In the above-mentioned embodiment, by setting the second low-temperature distillation tower 30, the CO and nitrogen in the treated pure tail gas can be separated, and the obtained CO can be compressed by the CO compressor 17 and then supplemented for use, and the obtained Nitrogen can be stored and utilized by the nitrogen storage tank 10, so the present invention can also supplement and recycle the relatively high-purity CO2 and nitrogen in the tail gas, further reducing the waste of resources.

实施例Example

本实施例的火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统，包括锅炉1、透平2、发电机3、第一逆变器4、第一电源开关5、第二逆变器7、第二电源开关8、空分装置9、氮气储存罐10、氧气储存罐11、防爆增压风机12、送风机13、冷凝器14、除尘装置15、一体化污染物脱除装置16、CO2压缩机17、第二低温蒸馏塔30以及多个防爆调节阀；锅炉1连接透平2，透平2连接发电机3。发电机3分两路，一路余电网6连接，发电机3与电网6之间的连接线路上设置了第一逆变器4和第一电源开关5；发电机3的另一路连接空分装置9，发电机3与空分装置9之间连接的线路上设置第二逆变器7和第二电源开关8。锅炉1的烟气出口沿烟气流程方向依次布置冷凝气14、冷凝器14、除尘装置15、一体化污染物脱除装置16、第二低温蒸馏塔30和CO2压缩机17，第二低温蒸馏塔30的氮气出口与氮气储存罐10连接第二低温蒸馏塔30的CO2出口与CO2压缩机17入口连接。空分装置9的出口分三路，一路依次连接第五防爆调节阀18、氮气储存罐10、第六防爆调节阀19到用户；其次一路依次连接第一防爆调节阀20、氧气储存罐11、第四防爆调节阀21到用户；最后一路连接第二防爆调节阀23，接入到防爆增压风机12。氧气储存罐11分两路，一路直接连接防爆调节阀21到用户，另一路连接防爆调节阀22到增压风机入口。送风机13与防爆增压风机12连接锅炉1，为锅炉燃烧供应氧化剂。本实施例中，空分装置9采用上述两级空气压缩机和换热器的结构形式。The thermal power plant air separation energy storage coupled with oxygen-enriched combustion carbon capture integrated system of this embodiment includes a boiler 1, a turbine 2, a generator 3, a first inverter 4, a first power switch 5, a second inverter Transformer 7, second power switch 8, air separation unit 9, nitrogen storage tank 10, oxygen storage tank 11, explosion-proof booster fan 12, blower fan 13, condenser 14, dust removal device 15, integrated pollutant removal device 16 , CO 2 compressor 17, second low-temperature distillation tower 30, and multiple explosion-proof regulating valves; boiler 1 is connected to turbine 2, and turbine 2 is connected to generator 3. The generator 3 is divided into two circuits, one of which is connected to the power grid 6, and the first inverter 4 and the first power switch 5 are arranged on the connecting line between the generator 3 and the grid 6; the other circuit of the generator 3 is connected to the air separation unit 9. A second inverter 7 and a second power switch 8 are installed on the line connecting the generator 3 and the air separation unit 9 . The flue gas outlet of boiler 1 is arranged sequentially along the flue gas flow direction with condensed gas 14, condenser 14, dust removal device 15, integrated pollutant removal device 16, second low-temperature distillation tower 30 and CO2 compressor 17, and the second low-temperature The nitrogen outlet of the distillation tower 30 is connected to the nitrogen storage tank 10 , and the CO 2 outlet of the second low-temperature distillation tower 30 is connected to the CO 2 compressor 17 inlet. The outlet of the air separation unit 9 is divided into three routes, one route is successively connected to the fifth explosion-proof regulating valve 18, nitrogen storage tank 10, and the sixth explosion-proof regulating valve 19 to the user; secondly, one route is connected successively to the first explosion-proof regulating valve 20, oxygen storage tank 11, The fourth explosion-proof regulating valve 21 is connected to the user; the last route is connected to the second explosion-proof regulating valve 23 and connected to the explosion-proof booster fan 12 . The oxygen storage tank 11 is divided into two circuits, one of which is directly connected to the explosion-proof regulating valve 21 to the user, and the other is connected to the explosion-proof regulating valve 22 to the inlet of the booster fan. Blower 13 and explosion-proof booster fan 12 are connected to boiler 1 to supply oxidant for boiler combustion. In this embodiment, the air separation unit 9 adopts the structure of the above-mentioned two-stage air compressor and heat exchanger.

本实施例火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统的工作方法，包括以下过程：In this embodiment, the working method of the thermal power plant air separation energy storage coupled with oxygen-enriched combustion and carbon capture integrated system includes the following processes:

当火电机组需要深度调峰时，闭合第二电源开关8，使空分装置9通电工作，打开第五防爆调节阀18，将氮气储存在氮气储存罐10，若用户时时需要氮气就打开第六防爆调节阀19，供用户使用。打开第一防爆调节阀20及第二防爆调节阀23，一部分将氧气储存在氧气储存罐11，另一部分直接送入到防爆增压风机12入口。通过防爆增压风机12增压后在送风机13出口混合，一起送入到锅炉1进行富养燃烧。若用户时时需要氧气时，打开第四防爆调节阀21，供用户使用，多余的氧气储存在氧气储存罐11。在空分装置9运行时，空气低压压缩机24将常温常压的空气压缩到2-2.5Mpa，空气低压压缩机24出口的压缩空气温度为510-560℃，空气低压压缩机24输出的压缩空气经过低温换热器25进行换热，温度控制到200-250℃；低温换热器25输出的压缩空气然后再进入空气高压压缩机26，空气高压压缩机26将空气压缩到4-4.5Mpa，空气高压压缩机26出口的压缩空气温度为670-720℃，空气高压压缩机26输出的压缩空气进入高温换热器换热27进行换热，将高温换热器换热27输出的压缩空气温度控制在350-400℃、并送入到膨胀机28中，做功产生电能或者机械能；做功后膨胀机出口排气压力0.1-0.2Mpa，温度为50-100℃，膨胀机28将压缩空气送入到第一低温蒸馏塔29内分离氧气与氮气，氮气进入氮气储存罐10，第二低温蒸馏塔30将分离出的氮气送入氮气储存罐10，将分离出的CO2送入CO2压缩机17进行压缩、回收。When the thermal power unit needs deep peak regulation, close the second power switch 8 to make the air separation unit 9 energized and work, open the fifth explosion-proof regulating valve 18, and store nitrogen in the nitrogen storage tank 10. If the user needs nitrogen from time to time, open the sixth The explosion-proof regulating valve 19 is for users to use. Open the first explosion-proof regulating valve 20 and the second explosion-proof regulating valve 23, a part of oxygen is stored in the oxygen storage tank 11, and the other part is directly sent to the entrance of the explosion-proof booster fan 12. After being pressurized by the explosion-proof booster blower 12, they are mixed at the outlet of the blower 13, and sent to the boiler 1 together for nutrient-rich combustion. If the user needs oxygen from time to time, the fourth explosion-proof regulating valve 21 is opened for use by the user, and excess oxygen is stored in the oxygen storage tank 11. When the air separation unit 9 was running, the low-pressure air compressor 24 compressed the air at normal temperature and pressure to 2-2.5Mpa, the compressed air temperature at the outlet of the low-pressure air compressor 24 was 510-560°C, and the compressed air output by the low-pressure air compressor 24 The air passes through the low-temperature heat exchanger 25 for heat exchange, and the temperature is controlled to 200-250°C; the compressed air output by the low-temperature heat exchanger 25 then enters the air high-pressure compressor 26, and the air high-pressure compressor 26 compresses the air to 4-4.5Mpa , the temperature of the compressed air at the outlet of the high-pressure air compressor 26 is 670-720°C, the compressed air output by the high-pressure air compressor 26 enters the high-temperature heat exchanger 27 for heat exchange, and the compressed air output by the high-temperature heat exchanger 27 The temperature is controlled at 350-400°C and sent to the expander 28 to generate electrical energy or mechanical energy by doing work; after the work, the outlet pressure of the expander is 0.1-0.2Mpa, the temperature is 50-100°C, and the expander 28 sends the compressed air to Enter the first cryogenic distillation tower 29 to separate oxygen and nitrogen, nitrogen enters the nitrogen storage tank 10, the second cryogenic distillation tower 30 sends the separated nitrogen into the nitrogen storage tank 10, and sends the separated CO into the CO for compression Machine 17 compresses and reclaims.

当火电机组发电供电需求增加时，则断开第二电源开关8，此时空气低压压缩机24、空气高压压缩机26和膨胀机28不再工作，锅炉1单独运行进行发电，同时CO2压缩机17的动力来源切换至发电机3供电。关闭第五防爆调节阀18、第一防爆调节阀20和第二防爆调节阀23，打开第六防爆调节阀19和第三防爆调节阀22，利用储存在氮气储存罐10的氮气供用户使用。利用储存在氧气储存罐11的氧气通过防爆增压风机12，与空气混合送入到炉1内进行富养燃烧。此时锅炉仍能保证处于富氧燃烧阶段，提高了锅炉效率，降低了污染物排放，减少了碳排放。When the demand for power generation and power supply of the thermal power unit increases, the second power switch 8 is disconnected. At this time, the low-pressure air compressor 24, the high-pressure air compressor 26 and the expander 28 no longer work, and the boiler 1 operates alone to generate electricity, while the CO 2 is compressed The power source of machine 17 is switched to generator 3 to supply power. Close the fifth explosion-proof regulating valve 18, the first explosion-proof regulating valve 20 and the second explosion-proof regulating valve 23, open the sixth explosion-proof regulating valve 19 and the third explosion-proof regulating valve 22, and utilize the nitrogen stored in the nitrogen storage tank 10 for users to use. Oxygen stored in the oxygen storage tank 11 is mixed with air into the furnace 1 through the explosion-proof booster blower 12 for nutrient-rich combustion. At this time, the boiler can still be guaranteed to be in the oxygen-enriched combustion stage, which improves boiler efficiency, reduces pollutant emissions, and reduces carbon emissions.

本发明不论火电机组发电需求量大还是需要深度调峰时，锅炉燃烧系统始终处于富氧燃烧阶段，燃烧产物含有80％以上CO2，烟气通过冷凝器14将烟气中的水全部冷凝，再经过除尘装置15、一体化污染物脱除装置16将烟气中污染物NOx、SO2脱除，得到纯净的CO2与氮气的混合气体，纯净的CO2与氮气的混合气体经第二低温蒸馏塔30进行分离和分别回收，其中通过CO2压缩机17得以捕集封存，减少碳排放，氮气被送入氮气储存罐10进行资源化利用。In the present invention, regardless of whether the power generation demand of the thermal power unit is large or deep peak regulation is required, the boiler combustion system is always in the oxygen-enriched combustion stage, and the combustion products contain more than 80% CO 2 , and the flue gas passes through the condenser 14 to condense all the water in the flue gas. Then through the dust removal device 15 and the integrated pollutant removal device 16, the pollutants NO x and SO 2 in the flue gas are removed to obtain a pure mixed gas of CO 2 and nitrogen, and the pure mixed gas of CO 2 and nitrogen passes through the first The second low-temperature distillation tower 30 is used for separation and separate recovery, wherein the CO 2 compressor 17 is used to capture and seal up carbon emissions, and the nitrogen gas is sent to the nitrogen gas storage tank 10 for resource utilization.

综上可以看出，本发明火电厂空分储能耦合富氧燃烧碳捕集一体化集成系统结构简单，即解决了深度调峰，又实现了碳减排且效果佳，整体经济效益较好。In summary, it can be seen that the air separation energy storage coupled with oxygen-enriched combustion and carbon capture integrated system of the present invention has a simple structure, which not only solves the problem of deep peak regulation, but also realizes carbon emission reduction with good effect and good overall economic benefits .

Claims (6)

1. An integrated system for air separation energy storage coupling oxygen-enriched combustion carbon capture in a thermal power plant is characterized by comprising a boiler (1), a turbine (2), a generator (3), an air separation device (9), an oxygen storage tank (11), an explosion-proof booster fan (12), a blower (13), a flue gas treatment system and a tail gas separation and recovery system, wherein the boiler (1) is connected with the turbine (2), and the turbine (2) is connected with the generator (3); the output end of the generator (3) is divided into two paths, one path can be connected with a power grid (6), and the other path is connected with an air separation device (9); the air separation device (9) is connected with the oxygen storage tank (11) and the explosion-proof booster fan (12), a first explosion-proof regulating valve (20) and a second explosion-proof regulating valve (23) are respectively arranged on a connecting pipeline of the air separation device (9) and the oxygen storage tank (11) and a pipeline of the air separation device (9) connected with the explosion-proof booster fan (12), an outlet of the oxygen storage tank (11) is connected with the explosion-proof booster fan (12), and a third explosion-proof regulating valve (22) is arranged on the connecting pipeline; an oxygen inlet of the boiler (1) of the blower (13) is connected, and an outlet of the explosion-proof booster fan (12) is communicated with an outlet of the blower (13); the flue gas treatment system is connected with a flue gas outlet of the boiler (1), the tail gas separation and recovery system is connected with an outlet of the flue gas treatment system, and the tail gas separation and recovery system is also connected with the generator (3);
the air separation device (9) is also connected with a nitrogen storage tank (10), and a fifth explosion-proof regulating valve (18) is arranged on a pipeline connecting the air separation device (9) and the nitrogen storage tank (10);
the air separation device (9) comprises an air compressor, a heat exchanger, an expander (28) and a first cryogenic distillation tower (29), the air compressor is connected with the heat exchanger, the heat exchanger is connected with the expander (28), the expander (28) is connected with the first cryogenic distillation tower (29), the air compressor is also connected with a generator (3), and a nitrogen outlet of the first cryogenic distillation tower (29) is connected with a nitrogen storage tank (10);
the tail gas separation and recovery system comprises CO 2 A compressor (17) and a second cryogenic distillation tower (30), the inlet of the second cryogenic distillation tower (30) is connected with the gas outlet of the integrated pollutant removal device (16), the second cryogenic distillation tower (30) is provided with a nitrogen outlet and CO 2 The nitrogen outlet of the second cryogenic distillation tower (30) is connected with the nitrogen storage tank (10) to CO of the second cryogenic distillation tower (30) 2 Outlet and CO 2 Inlet connection of compressor (17), CO 2 The compressor (17) is also connected with the generator (3) and the expander (28) respectively.
2. The integrated system for air separation energy storage coupling oxygen-enriched combustion carbon capture of the thermal power plant according to claim 1, characterized in that a first inverter (4) and a first power switch (5) are arranged on one circuit of which the output end of the generator (3) can be connected with a power grid (6); and a second inverter (7) and a second power switch (8) are arranged on a line connecting the generator (3) and the air separation device (9).
3. The integrated system for air separation, energy storage, coupling, oxygen combustion and carbon capture in a thermal power plant as claimed in claim 1, wherein the outlet of the oxygen storage tank (11) is further provided with a pipeline connected with an oxygen user, and the pipeline is provided with a fourth explosion-proof regulating valve (21).
4. The integrated system for air separation energy storage coupling oxygen-enriched combustion carbon capture of the thermal power plant as claimed in claim 1, wherein the outlet of the nitrogen storage tank (10) is provided with a pipeline connected with a nitrogen user, and the pipeline is provided with a sixth explosion-proof regulating valve (19).
5. The thermal power plant air separation energy storage coupling oxygen-enriched combustion carbon capture integrated system as claimed in claim 4, wherein the flue gas treatment system comprises a condenser (14), a dust removal device (15) and an integrated pollutant removal device (16), an inlet of the condenser (14) is connected with a flue gas outlet of the boiler (1), an inlet of the dust removal device (15) is connected with a gas outlet of the condenser (14), and a gas outlet of the dust removal device (15) is connected with a gas inlet of the integrated pollutant removal device (16).
6. The integrated method for air separation energy storage coupling oxygen-enriched combustion carbon capture of the thermal power plant is implemented by the integrated system for air separation energy storage coupling oxygen-enriched combustion carbon capture of the thermal power plant according to any one of claims 1 to 5, and comprises the following processes:
connecting the output end of the generator (3) with a power grid;
when the thermal power generating unit needs deep peak shaving, the air separation unit (9) is enabled to work, the first explosion-proof regulating valve (20) and the second explosion-proof regulating valve (23) are opened, one part of oxygen obtained by the air separation unit (9) is stored in the oxygen storage tank (11), and the other part of oxygen is sent to the inlet of the explosion-proof booster fan (12); after being pressurized by an explosion-proof booster fan (12), oxygen is mixed at the outlet of a blower (13) and is sent to a boiler (1) together for eutrophication combustion;
when the power generation and supply requirements of the thermal power generating unit are increased, the air separation unit (9) stops working, the first explosion-proof regulating valve (20) and the second explosion-proof regulating valve (23) are closed, the third explosion-proof regulating valve (22) is opened, and oxygen in the oxygen storage tank (11) is sent to the inlet of the explosion-proof booster fan (12); after being pressurized by an explosion-proof booster fan (12), oxygen is mixed at the outlet of a blower (13) and is sent to a boiler (1) together for eutrophication combustion;
in the working process of the boiler (1), the tail gas of the boiler (1) is purified and decontaminated by a flue gas treatment system to obtain pure CO 2 Mixed gas with nitrogen, pure CO 2 Separating and recovering the mixed gas with the nitrogen through a tail gas separation and recovery system;
when the thermal power generating unit needs deep peak shaving, the air compressor compresses air and then utilizes the heat exchanger to exchange heat, so that the temperature of the compressed air reaches expansionThe working temperature of the machine (28), the expander (28) sending the compressed air into the first cryogenic distillation tower (29), the first cryogenic distillation tower (29) separating oxygen and nitrogen from the air, the nitrogen entering the nitrogen storage tank (10); expander (28) driven CO 2 The compressor (17) is operated; the second cryogenic distillation tower (30) feeds the separated nitrogen gas into a nitrogen storage tank (10) and separates CO 2 Feeding CO 2 The compressor (17) compresses and recovers;
when the power generation and supply demand of the thermal power generating unit increases, the expander (28) stops driving CO 2 The compressor (17) is operated and the generator (3) drives CO 2 The compressor (17) is operated; the second cryogenic distillation tower (30) feeds the separated nitrogen gas into a nitrogen storage tank (10) and separates CO 2 Feeding CO 2 The compressor (17) compresses and recovers the refrigerant.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102344138A (en) * 2010-07-08 2012-02-08 气体产品与化学公司 Removal of sox from compressed oxyfuel-derived co2

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AT510273B1 (en) * 2011-03-17 2012-03-15 Siemens Vai Metals Tech Gmbh METHOD FOR HEATING CONTROL FOR EXHAUST GASES FROM REPRODUCTION OR SYNTHESEGAS PLANTS
CN202419679U (en) * 2011-12-14 2012-09-05 浙江天蓝环保技术股份有限公司 Flue gas desulfurization system
CN103143247B (en) * 2013-01-30 2015-09-09 杭州森井大气环境科技有限公司 The preparation method that collecting carbonic anhydride and catalytic cycle utilize
CN105605602B (en) * 2016-01-28 2017-10-31 华中科技大学 LNG cold energy is used for the natural gas oxygen-enriched combustion system that making oxygen by air separation and carbon are captured
CN107626183B (en) * 2016-11-15 2024-04-02 宁波瑞信能源科技有限公司 Oxygen-enriched combustion carbon dioxide trapping integrated system suitable for peak-valley load operation of power grid
CN107062299B (en) * 2017-03-29 2023-06-27 济南九棵树新能源科技有限公司 Special combustion explosion-proof system for boiler alcohol-based fuel and active explosion-proof method
CN214196426U (en) * 2021-01-18 2021-09-14 西安热工研究院有限公司 Integrated system for air separation energy storage coupling oxygen-enriched combustion carbon capture of thermal power plant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102344138A (en) * 2010-07-08 2012-02-08 气体产品与化学公司 Removal of sox from compressed oxyfuel-derived co2

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