CN209671079U - The gaseous fuel heating system of Combined cycle gas-steam turbine - Google Patents
The gaseous fuel heating system of Combined cycle gas-steam turbine Download PDFInfo
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- CN209671079U CN209671079U CN201920054633.9U CN201920054633U CN209671079U CN 209671079 U CN209671079 U CN 209671079U CN 201920054633 U CN201920054633 U CN 201920054633U CN 209671079 U CN209671079 U CN 209671079U
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- 239000000446 fuel Substances 0.000 title claims abstract description 131
- 238000010438 heat treatment Methods 0.000 title claims abstract description 70
- 239000007789 gas Substances 0.000 claims abstract description 153
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 137
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000000779 smoke Substances 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims description 23
- 239000002918 waste heat Substances 0.000 claims description 23
- 239000000567 combustion gas Substances 0.000 claims description 8
- 230000002209 hydrophobic effect Effects 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 6
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- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- 230000026676 system process Effects 0.000 description 4
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- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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Abstract
This application involves a kind of gaseous fuel heating systems of Combined cycle gas-steam turbine, including water-gas heat exchanger, jet dynamic control, steam-electric power unit and steam boiler equipment.Water-gas heat exchanger air inlet connects the gas fuel inlet of jet dynamic control for accessing gaseous fuel, gas outlet, and water inlet connects the water inlet of steam boiler equipment for accessing heat supply return water, water outlet.The smoke inlet of the exhanst gas outlet connection steam boiler equipment of jet dynamic control；The steam inlet of the steam (vapor) outlet connection steam-electric power unit of steam boiler equipment；The condensing entrance of the steam drain connection steam boiler equipment of steam-electric power unit.It does not need to consume the additional energy, accomplishes the cascade utilization of the energy, reduce the operating cost of power plant, increase economic efficiency using the low-quality hot heat gas fuel of heat supply return water based on this；Meanwhile high-temperature flue gas disposal of pollutants can be reduced, the low use of high energy is avoided, generating efficiency is improved.
Description
Technical field
This application involves fuel gas generation technical fields, add more particularly to a kind of gaseous fuel of Combined cycle gas-steam turbine
Hot systems.
Background technique
Due to gas turbine have many advantages, such as high-efficient, low cost, discharge less and regulation it is flexible, China's fuel gas generation accounts for
Power generation total installed capacity specific gravity improves year by year.With domestic generator yield continue to increase and the continuous improvement of emission request, future
China's Combined cycle gas-steam turbine unit has broader development space.In gas combustion-gas vapor combined cycle unit, gas combustion
The heating pressure regulation of material is one of most important step in fuel processing system.
Gaseous fuel discharge pressure in outside ductwork is often higher, to meet the needs of large area long range user.And it fires
The admission pressure of gas-turbine requires lower, needs to adjust fuel pressure at this time, gaseous fuel in pressure reduction temperature also with
Decline, gaseous fuel, which freezes, in order to prevent there is blocking (ice is stifled), it is therefore desirable to first heat to fuel, to ensure unit
Safe bringing normally into operation.During realization, inventor has found that at least there are the following problems: traditional gaseous fuel in traditional technology
Heat protocol is at high cost and can reduce generating efficiency.
Utility model content
Based on this, it is necessary to it is at high cost traditional gaseous fuel heat protocol and aiming at the problem that generating efficiency can be reduced,
A kind of Combined cycle gas-steam turbine gaseous fuel heating system is provided.
To achieve the goals above, the embodiment of the present application provides a kind of gaseous fuel heating of Combined cycle gas-steam turbine
System, comprising: water-gas heat exchanger, jet dynamic control, steam-electric power unit and steam boiler equipment.
Water-gas heat exchanger air inlet is for accessing gaseous fuel；Water-gas heat exchanger gas outlet connects gas electricity generator
The gas fuel inlet of group；Water-gas heat exchanger water inlet is for accessing heat supply return water；The connection of water-gas heat exchanger water outlet
The water inlet of steam boiler equipment.The smoke inlet of the exhanst gas outlet connection steam boiler equipment of jet dynamic control；Steam copper
The steam inlet of the steam (vapor) outlet connection steam-electric power unit of furnace apparatus；The steam drain connection steam boiler of steam-electric power unit is set
Standby condensing entrance.
Jet dynamic control includes the first power generation of gas turbine and connection gas turbine in one of the embodiments,
Machine.The gas fuel inlet of gas turbine connects water-gas heat exchanger gas outlet, and the exhanst gas outlet of gas turbine connects steam copper
The smoke inlet of furnace apparatus.
Steam-electric power unit includes steam turbine and the second power generation for connecting steam turbine in one of the embodiments,
Machine.The steam (vapor) outlet of the steam inlet connection steam boiler equipment of steam turbine；The steam drain of steam turbine connects steam boiler
The condensing entrance of equipment.
The extraction for heat supply of steam turbine is exported for connecting heating system in one of the embodiments,；Water-gas heat exchanger
Water inlet be used to access the heat supply return water of heating system.
Steam boiler equipment includes waste heat boiler and condenser in one of the embodiments,.The flue gas of waste heat boiler into
The exhanst gas outlet of mouth connection jet dynamic control；The steam inlet of the steam (vapor) outlet connection steam-electric power unit of waste heat boiler；It is remaining
The condensed water water outlet of the water inlet connection condenser of heat boiler；The hydrophobic entrance of condenser connects the water outlet of water-gas heat exchanger
Mouthful；The steam drain of the condensing entrance connection steam-electric power unit of condenser.
The cooling water inlet of condenser is for accessing recirculated cooling water in one of the embodiments,.
It in one of the embodiments, further include water treatment facilities；Water-gas heat exchanger water outlet passes through water treatment facilities
Connect the hydrophobic entrance of condenser.
Water treatment facilities are ion-exchange water treatment facilities in one of the embodiments,.
Water treatment facilities are membrane water treatment equipment in one of the embodiments,.
Water-gas heat exchanger is plate heat exchanger or pipe heat exchanger in one of the embodiments,.
A technical solution in above-mentioned technical proposal is had the following advantages and beneficial effects:
The gaseous fuel heating system of Combined cycle gas-steam turbine, including water-gas heat exchanger, jet dynamic control, steam
Generating set and steam boiler equipment.Water-gas heat exchanger air inlet connects combustion gas hair for accessing gaseous fuel, gas outlet
The gas fuel inlet of motor group, water inlet connect the water inlet of steam boiler equipment for accessing heat supply return water, water outlet.Combustion
The smoke inlet of the exhanst gas outlet connection steam boiler equipment of gas generating set；The steam (vapor) outlet of steam boiler equipment connects steam
The steam inlet of generating set；The condensing entrance of the steam drain connection steam boiler equipment of steam-electric power unit.It, can benefit based on this
It with the low-quality hot heat gas fuel of heat supply return water, does not need to consume the additional energy, accomplishes the cascade utilization of the energy, reduce
The operating cost of power plant, increases economic efficiency；Meanwhile high-temperature flue gas disposal of pollutants can be reduced, the low use of high energy is avoided, power generation is improved
Efficiency.
Detailed description of the invention
By being more particularly described for preferred embodiment of the present application shown in the drawings, the above and other mesh of the application
, feature and advantage will become more fully apparent.Identical appended drawing reference indicates identical part in all the attached drawings, and does not carve
Meaning draws attached drawing by actual size equal proportion scaling, it is preferred that emphasis is shows the purport of the application.
Fig. 1 is the process flow diagram of steam heat gas fuel；
Fig. 2 is the process flow diagram of cooling water return heat gas fuel；
Fig. 3 is the first schematic structure of the gaseous fuel heating system of Combined cycle gas-steam turbine in one embodiment
Figure；
Fig. 4 is the second schematic structure of the gaseous fuel heating system of Combined cycle gas-steam turbine in one embodiment
Figure；
Fig. 5 is the third schematic structure of the gaseous fuel heating system of Combined cycle gas-steam turbine in one embodiment
Figure；
Fig. 6 is the 4th schematic structure of the gaseous fuel heating system of Combined cycle gas-steam turbine in one embodiment
Figure；
Fig. 7 is the 5th schematic structure of the gaseous fuel heating system of Combined cycle gas-steam turbine in one embodiment
Figure；
Fig. 8 is the 6th schematic structure of the gaseous fuel heating system of Combined cycle gas-steam turbine in one embodiment
Figure.
Specific embodiment
The application in order to facilitate understanding is described more fully the application below with reference to relevant drawings.In attached drawing
Give the preferred embodiment of the application.But the application can realize in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to disclosure of this application.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element and it is in combination be integrated, or may be simultaneously present centering elements.Term as used herein " water inlet ",
" water outlet ", " entrance " and " outlet " similar statement is for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
The heating method of gaseous fuel can be divided into non-renewable energy heating and secondary energy sources heat two kinds.Traditional primary energy
Source heating method includes electric heating and water-bath furnace etc..Electric heating is heating resistance wire to be wound on fuel channel, or make
Fuel is heated by electric heater, is required to consume more electric energy, is increased station service, reduces power supply efficiency.Water-bath furnace
Heating method is extraction section gas fuel combustion, is the heat that intermediate medium absorbs that burn gas fuel generates using water, passes
Gaseous fuel to be heated is passed, achievees the purpose that heating.Water-bath furnace apparatus cost is high, and operation need to consume additional gas fuel,
Operating cost is high, is unfavorable for the energy-saving and emission-reduction of power plant.
The secondary energy sources heat gas fuel mode of developed recently, including auxiliary steam heating method and recirculated cooling water return
Water heating method.Auxiliary steam heating method is to extract high-grade steam out from steam turbine to directly heat gaseous fuel.The party
Case directly consumes fuel or energy finished product unlike non-renewable energy heating method, but extracts after so that steam has been done a part of function,
There is Energy-saving reformation compared with non-renewable energy, still, high-grade steam originally can continue to do work in steam turbine, and therefore, the program is still
It is the low mode of high energy.
In the example of a traditional technology, the high-grade auxiliary steam in power plant's steam inside circulatory system is extracted to add
Hot fuel.The steam of high heating value is intermediate in steam turbine to be extracted a part, is heated by steam-gas heat-exchanger
Gaseous fuel utilizes high-grade steam vaporization latent heat gaseous fuel.The technical solution technical process is detailed in Fig. 1,
Fig. 1 is the process flow diagram of steam heat gas fuel.Due to using high-grade steam heat gas fuel, sufficiently benefit
With the latent heat of vaporization, steam consumption quantity can be reduced, therefore heat exchanger overall volume is smaller, gaseous fuel processing system characteristics of compact layout.
But steam grade used in the technical solution is high, and the low use of high energy does not meet the energy saving thinking of energy cascade utilization.It is auxiliary
Steam is helped to be extracted the low-grade gaseous fuel of heating in steam turbine, the quantity of steam of acting power generation is reduced in steam turbine, power plant
Generating efficiency reduce, to reduce performance driving economy.Meanwhile vapor (steam) temperature is higher, need to use high level of pressure pipeline, steam
Vapour-gas heat-exchanger also belongs to pressure vessel, improves heating system device cost.
It in recent years is a kind of preferable using the cooling water return heat gas fuel of condenser in more steam circulation
In the way of low-quality waste heat.It is to extract all or part of cooling water return, and boosting heat exchange, gaseous fuel is added
The temperature that heat is required to gas turbine is drained after cooling water return water is cooled.But the temperature of recirculated water is lower, available range
It is smaller.
In the example of a traditional technology, cooling water return heat gas fuel energy-saving system is as shown in Fig. 2, figure
2 be the process flow diagram of cooling water return heat gas fuel.For gaseous fuel (including the day for heating gas turbine
The combustible gaseous fuels such as right gas, coal gas and industrial waste gas), extract all or part of steam turbine steam circulation cold end condenser
Cooling water return water, after adherence pressure, be discharged into water-gas heat exchanger.Tube Sheet of Heat Exchanger side and shell-side flow separately through gaseous fuel and cold
But water return water, gaseous fuel is heated to the temperature of gas turbine requirement after two media heat exchange, and cooling water return water is cooled
Heel row finally supplies condenser again and completes closed cycle, or discharge into rivers,lakes and seas and complete open circulation into reservoir.
Cooling water return heat gas fuel utilization waste heat gaseous fuel, there is energy-saving and environment-friendly advantage.But it should
Technical solution is maximum the disadvantage is that use condition is stringent, it is impossible to be used in the biggish combustion and steam connection of pressure difference before and after gaseous fuel pressure regulation
Close circulating generation unit, it is impossible to be used in circulating cooling coolant-temperature gage lower area.
Currently, domestic gaseous fuel long-distance transport pipes are increasingly longer, ductwork pressure is higher and higher, and gaseous fuel is caused to carry out air pressure
The admission pressure difference that power and gas turbine require is increasing.It can cool down rapidly when because of gas decompression, when pressure difference is larger, be
Prevent gaseous fuel icing from line clogging being caused to influence Power Plant operational safety, before pressure regulation the temperature of gaseous fuel need by
Heat get Geng Gao.For example, the defeated terminal of gaseous fuel point comes atmospheric pressure about 9MPa (megapascal), gas turbine inlet fuel pressure demand
For 3.9MPa, then pressure difference is 5.1MPa.The every reduction 1MPa temperature of industrial gas fluid fuel reduces about 5 DEG C (degree Celsius).Winter gas
Fluid fuel temperature is close to environment temperature, and for 0 DEG C, and gas turbine inlet gaseous fuel minimum temperature requires to be 5 DEG C~15
DEG C (gas turbine of different model is slightly different).So must before pressure regulation heat gas fuel to 30 DEG C or more even to 40
℃.Cooling water return temperature is not usually high, and southern Power Plant condenser cooling water return temperature winter is general
It is 25 DEG C or so, and the cooling water return water temperature in the Power Plant winter in the north is lower, average only 18 DEG C, in the case, no
The law of thermodynamics may be violated, gaseous fuel is heated to 30 DEG C.Therefore, the use condition of cooling water return heating technique
More stringent, applicable surface is not wide.
Currently, in China's gas combustion-gas vapor combined cycle unit 30% or so be thermal power plant unit.Heating return water or
The temperature of industrial heating return water is generally 60 DEG C~90 DEG C, and stability of flow, heat are larger.As can effective use heat supply return water
Low-quality thermal energy, economic benefits.Meanwhile in terms of environmental angle, using the low-quality heat of heat supply return water, it certainly will reduce
The consumption of the energy such as coal, gaseous fuel also reduces dust pollution and SO2Discharge.For this purpose, the embodiment of the present application utilizes heat supply
The low-quality hot heat gas fuel of return water, it then follows the cascade utilization principle of the energy had both avoided additionally consuming the energy and high energy
Low use, there are also broad applicability, have it is energy-efficient, it is environmental-friendly, be widely used, many advantages, such as process is simple, small investment.
In one embodiment, a kind of gaseous fuel heating system of Combined cycle gas-steam turbine is provided, as shown in figure 3,
Fig. 3 is the first schematic diagram of the gaseous fuel heating system of Combined cycle gas-steam turbine in one embodiment, comprising:
Water-gas heat exchanger, jet dynamic control, steam-electric power unit and steam boiler equipment.
Water-gas heat exchanger air inlet is for accessing gaseous fuel；Water-gas heat exchanger gas outlet connects gas electricity generator
The gas fuel inlet of group；Water-gas heat exchanger water inlet is for accessing heat supply return water；The connection of water-gas heat exchanger water outlet
The water inlet of steam boiler equipment.The smoke inlet of the exhanst gas outlet connection steam boiler equipment of jet dynamic control；Steam copper
The steam inlet of the steam (vapor) outlet connection steam-electric power unit of furnace apparatus；The steam drain connection steam boiler of steam-electric power unit is set
Standby condensing entrance.
Specifically, in the gaseous fuel heating system of Combined cycle gas-steam turbine, water-gas heat exchanger, fuel gas generation
Unit and steam boiler equipment are connected with each other；Meanwhile steam boiler equipment connects steam-electric power unit, water-gas heat exchanger difference
Access gaseous fuel and the heat supply return water for heat gas fuel.Specifically, gaseous fuel enters water-gas heat exchange from air inlet
Device, heat supply return water enter from the inlet water-gas heat exchanger, will heat into water-gas heat exchanger gaseous fuel.After heating
Gaseous fuel successively through water-gas outlet of gas heat exchanger and the gas fuel inlet of jet dynamic control enter combustion gas hair
Motor group, so that jet dynamic control generates electricity according to gaseous fuel.After heat supply return water heats gaseous fuel, it can flow
Enter steam boiler equipment, as steam boiler equipment prepare steam use water.Jet dynamic control is carried out based on gaseous fuel
After power generation, obtained flue gas can be transmitted to steam boiler equipment.Steam boiler equipment can generate steaming based on the waste heat of flue gas
Vapour, and by vapor transmission to steam-electric power unit.The steam that steam-electric power unit can be transmitted based on steam boiler equipment is sent out
Electricity, and the steam after power generation is successively entered into steam boiler equipment through steam drain and condensing entrance.Steam boiler equipment is to steam
After being condensed, obtained condensed water can be used for heating generation steam.
It should be noted that water-gas heat exchanger can be heated using heat supply return water to gaseous fuel；Wherein, heat supply return water can
For the heat supply return water of heating system, such as the heat supply return water of heat user, the heat supply return water of heating or industrial heating return water etc..Combustion gas
Generating set can be used gaseous fuel and generate electricity.Steam-electric power unit can be used steam and generate electricity.Steam boiler equipment can
For generating steam；Specifically, the waste heat energy of jet dynamic control can be used to be heated, obtain steam；Wherein, it is used for
The water source for generating steam can be water-outflow of gas heat exchanger, heat supply return water after cooling, can also be the steam discharge of steam-electric power unit
The condensed water obtained after condensing.
The gaseous fuel heat protocol that the embodiment of the present application uses is suitable for the gaseous fuel of gas turbine, including natural
The combustible gaseous fuels such as gas, coal gas and industrial waste gas.Specifically, using the low-quality heat of steam turbine extraction for heat supply return water
Heat gas fuel.Heat supply return water flows separately through gaseous fuel and heat supply time by water-gas heat exchanger, Tube Sheet of Heat Exchanger side and shell-side
Water, gaseous fuel is heated to the temperature of gas turbine requirement, and heat supply return water can enter back into steam boiler equipment after being cooled
In, it realizes in steam circulation therrmodynamic system and completes closed cycle.
The embodiment of the present application can utilize the low-quality hot heat gas fuel of heat supply return water, not need to consume additional energy
The cascade utilization of the energy is accomplished in source, reduces the operating cost of power plant, increases economic efficiency；Meanwhile high-temperature flue gas pollution can be reduced
Discharge avoids the low use of high energy, improves generating efficiency.The pressure and temperature of heat supply return water is lower, to equipment and pipeline pressure grade
Requirement it is low, safety in operation is higher, and the disposable input cost of system is lower, and easy to maintenance, maintenance cost is few.Combustion and steam connection
In the gaseous fuel heating system for closing circulation, gaseous fuel has stable heat source, ensures the peace of gas turbine or even power plant
Row for the national games, also, the embodiment of the present application is not by conditionalities such as environment temperature, end differences, and it is widely applicable.
In one embodiment, as shown in figure 4, Fig. 4 is the gaseous fuel of Combined cycle gas-steam turbine in one embodiment
Second schematic diagram of heating system, jet dynamic control include the first power generation of gas turbine and connection gas turbine
Machine.The gas fuel inlet of gas turbine connects water-gas heat exchanger gas outlet, and the exhanst gas outlet of gas turbine connects steam copper
The smoke inlet of furnace apparatus.
Specifically, jet dynamic control may include combustion gas in the gaseous fuel heating system of Combined cycle gas-steam turbine
Turbine and the first generator.Gaseous fuel after heating enters gas turbine by gas fuel inlet；Gas turbine, which utilizes, to be added
Gas after heat, which burns, to be operated, and the first generator is driven to generate electricity, meanwhile, the flue gas that using gas fuel is generated transmits
To steam boiler equipment.The thermal energy of flue gas can be used to generate steam for steam boiler equipment.
It should be noted that jet dynamic control may also include other equipment, device, the effect of fuel gas generation can be improved
Rate is enriched the function of jet dynamic control, is not particularly limited herein.
In one embodiment, as shown in figure 5, Fig. 5 is the gaseous fuel of Combined cycle gas-steam turbine in one embodiment
The third schematic diagram of heating system, steam-electric power unit include steam turbine and the second power generation for connecting steam turbine
Machine.The steam (vapor) outlet of the steam inlet connection steam boiler equipment of steam turbine；The steam drain of steam turbine connects steam boiler
The condensing entrance of equipment.
Specifically, steam-electric power unit may include steam in the gaseous fuel heating system of Combined cycle gas-steam turbine
Turbine and the second generator.The steam that steam boiler equipment generates enters steam turbine by steam inlet；Steam turbine utilizes
Steam operating, and the second generator is driven to generate electricity, meanwhile, used steam is transmitted to steam boiler equipment.Steam
After boiler plant can condense steam, the condensed water that can be used for generating steam is obtained.
It should be noted that steam-electric power unit may also include other equipment, device, the effect of steam-electric power can be improved
Rate is enriched the function of steam-electric power unit, is not particularly limited herein.
In one embodiment, as shown in figure 5, the extraction for heat supply of steam turbine is exported for connecting heating system；Water-gas
The water inlet of heat exchanger is used to access the heat supply return water of heating system.
Specifically, steam turbine can connect heating system in the gaseous fuel heating system of Combined cycle gas-steam turbine,
Realize extraction for heat supply.Heating system can heat for user or equipment, meanwhile, the heat supply return water that heating system obtains may be output to
Water-gas heat exchanger, the gaseous fuel for being added in water-gas heat exchanger.The embodiment of the present application can realize the circulation of heat supply return water
It uses, realization completes closed cycle in steam circulation therrmodynamic system.
In one embodiment, as shown in fig. 6, Fig. 6 is the gaseous fuel of Combined cycle gas-steam turbine in one embodiment
4th schematic diagram of heating system, steam boiler equipment include waste heat boiler and condenser.The flue gas of waste heat boiler into
The exhanst gas outlet of mouth connection jet dynamic control；The steam inlet of the steam (vapor) outlet connection steam-electric power unit of waste heat boiler；It is remaining
The condensed water water outlet of the water inlet connection condenser of heat boiler；The hydrophobic entrance of condenser connects the water outlet of water-gas heat exchanger
Mouthful；The steam drain of the condensing entrance connection steam-electric power unit of condenser.
Specifically, the flue gas that jet dynamic control obtains enters waste heat boiler by gas inlet, condenser condenses
To condensed water waste heat boiler is entered by condensed water water outlet.Waste heat boiler utilizes the energy heats condensed water of flue gas, and will
Obtained vapor transmission gives steam-electric power unit.Steam after using can be transmitted to condensing by steam drain by steam-electric power unit
Device is condensed, meanwhile, heat supply return water enters after water-gas heat exchanger heats gaseous fuel, can by hydrophobic entrance into
Enter condenser, and then waste heat boiler can be flowed into and carry out steam preparation.The cigarette of jet dynamic control can be used in the embodiment of the present application
The thermal energy of gas come generate steam-electric power unit needs steam, further increase the power generation of the utilization rate and electricity generation system of energy
Efficiency.In addition, steam boiler equipment may also include the chimney of connection waste heat boiler, for excluding discarded flue gas.
In one embodiment, as shown in fig. 6, the cooling water inlet of condenser is for accessing recirculated cooling water.
Specifically, condenser can access recirculated cooling water by cooling water inlet.Using recirculated cooling water to steam into
Row condensation, can effectively improve condensation efficiency.
In one embodiment, as shown in fig. 7, Fig. 7 is the gaseous fuel of Combined cycle gas-steam turbine in one embodiment
5th schematic diagram of heating system, further includes water treatment facilities；Water-gas heat exchanger water outlet passes through water treatment facilities
Connect the hydrophobic entrance of condenser.
Specifically, the gaseous fuel heating system of Combined cycle gas-steam turbine further includes water treatment facilities, water process is set
It is standby to be connected between water-gas heat exchanger water outlet and the hydrophobic entrance of condenser, it can be used for handling heat supply return water, filter
Except the impurity in heat supply return water, water quality is improved, guarantees the quality of steam, and then promotes reliability and the longevity of steam-electric power unit
Life.Heat supply return water temperature after heat utilization reduces, it is ensured that steam extraction-return water heat is improved in effective operation of water treatment facilities
Force system process, meanwhile, the process is simple and reliable, and initial outlay is few.
Since heating network belongs to long distance pipeline, pipeline breaking risk is big, and the water quality of heat supply return water cannot be guaranteed, therefore,
Before carrying out steam preparation into steam boiler equipment, heat supply return water need to carry out water process purification.But enter water treatment facilities
Return water temperature cannot be too high, the inflow temperature index of water treatment facilities need to be met, for example, the common ion-exchange of water process
It is required that water temperature, not above 45 DEG C, full embrane method requires water temperature not above 35 DEG C.Water treatment facilities are flowed to from water-gas heat exchanger
Water is heat supply return water after cooling, meets the water inlet index of water treatment facilities, perfect steam extraction-return water therrmodynamic system process.
In one embodiment, water treatment facilities are ion-exchange water treatment facilities or membrane water treatment equipment.
Specifically, water treatment facilities can be ion-exchange water treatment facilities or membrane water treatment equipment.This field
Technical staff can be according to the corresponding water treatment facilities of actual motion environmental selection of electricity generation system.
In one embodiment, water-gas heat exchanger is plate heat exchanger or pipe heat exchanger.
Specifically, water-gas heat exchanger can be plate heat exchanger or pipe heat exchanger, those skilled in the art can be according to hair
The heat exchanger of the actual motion demand selection respective type of electric system.
In one embodiment, as shown in figure 8, Fig. 8 is the gaseous fuel of Combined cycle gas-steam turbine in one embodiment
6th schematic diagram of heating system, gaseous fuel enter water-gas heat exchanger from air inlet, heat supply return water from water inlet into
Enter water-gas heat exchanger, will be heated into water-gas heat exchanger gaseous fuel.Gaseous fuel after heating is fired by gas
Material entrance enters gas turbine；Gas turbine is burnt using the gas after heating to be operated, and the first generator is driven to generate electricity,
Meanwhile the flue gas that using gas fuel generates is transmitted to waste heat boiler.The flue gas that jet dynamic control obtains by flue gas into
Mouth enters waste heat boiler, and the condensed water that condenser condenses enters waste heat boiler by water inlet.Waste heat boiler utilizes flue gas
Energy heats condensed water, and by obtained vapor transmission to steam turbine.Steam turbine is operated using steam, and drives second
Generator generates electricity, meanwhile, used steam is transmitted to coagulator.After coagulator can condense steam, obtain
It can be used for generating the condensed water of steam.
The embodiment of the present application can improve the therrmodynamic system process of heat supply return water, improve full thermodynamic system efficiency, energy-saving.
Specifically, it by the low-quality hot heat gas fuel using heat supply return water, does not need to consume the additional energy, accomplishes the energy
Cascade utilization reduces the operating cost of power plant, increases economic efficiency；Consumption additional energy source is avoided, high-temperature flue gas pollution row is reduced
Put, meet country-driven depth energy saving emission reduction policy, can make power plant invest and run in electricity market it is more competitive and
Vitality；The low use of high energy is avoided, generating efficiency is improved；Heat supply return water temperature after heat utilization reduces, and guarantees water treatment system
Effectively operation.Steam extraction-return water therrmodynamic system process is improved, process is simple and reliable, and initial outlay is few.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application range therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art,
Without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection model of the application
It encloses.Therefore, the scope of protection shall be subject to the appended claims by the application.
Claims (10)
1. a kind of gaseous fuel heating system of Combined cycle gas-steam turbine characterized by comprising water-gas heat exchanger, combustion gas
Generating set, steam-electric power unit and steam boiler equipment；
The water-gas heat exchanger air inlet is for accessing gaseous fuel；The water-gas heat exchanger gas outlet connects the combustion
The gas fuel inlet of gas generating set；The water-gas heat exchanger water inlet is for accessing heat supply return water；Water-the gas changes
The water outlet of hot device connects the water inlet of the steam boiler equipment；
The exhanst gas outlet of the jet dynamic control connects the smoke inlet of the steam boiler equipment；The steam boiler equipment
Steam (vapor) outlet connect the steam inlet of the steam-electric power unit；The steam drain of the steam-electric power unit connects the steam
The condensing entrance of boiler plant.
2. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 1, which is characterized in that the combustion
Gas generating set includes gas turbine and the first generator for connecting the gas turbine；
The gas fuel inlet of the gas turbine connects the water-gas heat exchanger gas outlet, the flue gas of the gas turbine
Outlet connects the smoke inlet of the steam boiler equipment.
3. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 1, which is characterized in that the steaming
Vapour generating set includes the second generator of steam turbine and the connection steam turbine；
The steam inlet of the steam turbine connects the steam (vapor) outlet of the steam boiler equipment；The steam drain of the steam turbine
Connect the condensing entrance of the steam boiler equipment.
4. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 3, which is characterized in that the steaming
The extraction for heat supply of steam turbine is exported for connecting heating system；The water-gas heat exchanger water inlet is for accessing the heat supply
The heat supply return water of system.
5. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 1, which is characterized in that the steaming
Steam-boiler furnace apparatus includes waste heat boiler and condenser；
The gas inlet of the waste heat boiler connects the exhanst gas outlet of the jet dynamic control；The steam of the waste heat boiler goes out
Mouth connects the steam inlet of the steam-electric power unit；The condensed water that the water inlet of the waste heat boiler connects the condenser goes out
The mouth of a river；The hydrophobic entrance of the condenser connects the water-gas heat exchanger water outlet；The condensing entrance of the condenser connects
The steam drain of the steam-electric power unit.
6. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 5, which is characterized in that described solidifying
The cooling water inlet of vapour device is for accessing recirculated cooling water.
7. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 5, which is characterized in that further include
Water treatment facilities；
The water-gas heat exchanger water outlet connects the hydrophobic entrance of the condenser by the water treatment facilities.
8. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 7, which is characterized in that the water
Processing equipment is ion-exchange water treatment facilities.
9. the gaseous fuel heating system of Combined cycle gas-steam turbine according to claim 7, which is characterized in that the water
Processing equipment is membrane water treatment equipment.
10. special according to claim 1 to the gaseous fuel heating system of Combined cycle gas-steam turbine described in 9 any one
Sign is that the water-gas heat exchanger is plate heat exchanger or pipe heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920054633.9U CN209671079U (en) | 2019-01-14 | 2019-01-14 | The gaseous fuel heating system of Combined cycle gas-steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920054633.9U CN209671079U (en) | 2019-01-14 | 2019-01-14 | The gaseous fuel heating system of Combined cycle gas-steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577410A (en) * | 2020-06-17 | 2020-08-25 | 杨漪 | Gas turbine inlet air temperature control device and gas turbine inlet air temperature control method |
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2019
- 2019-01-14 CN CN201920054633.9U patent/CN209671079U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577410A (en) * | 2020-06-17 | 2020-08-25 | 杨漪 | Gas turbine inlet air temperature control device and gas turbine inlet air temperature control method |
| CN111577410B (en) * | 2020-06-17 | 2024-06-18 | 北京恩康瑞节能技术有限公司 | Gas turbine inlet air temperature control device and gas turbine inlet air temperature control method |
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