CN109268861B - Flue gas condensation latent waste heat recovery and purification system based on mixed gas and humidification in furnace - Google Patents
Flue gas condensation latent waste heat recovery and purification system based on mixed gas and humidification in furnace Download PDFInfo
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- CN109268861B CN109268861B CN201811100695.5A CN201811100695A CN109268861B CN 109268861 B CN109268861 B CN 109268861B CN 201811100695 A CN201811100695 A CN 201811100695A CN 109268861 B CN109268861 B CN 109268861B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000003546 flue gas Substances 0.000 title claims abstract description 74
- 239000007789 gas Substances 0.000 title claims abstract description 69
- 239000002918 waste heat Substances 0.000 title claims abstract description 26
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 238000009833 condensation Methods 0.000 title claims abstract description 13
- 230000005494 condensation Effects 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000012528 membrane Substances 0.000 claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 239000002737 fuel gas Substances 0.000 claims abstract description 16
- 239000012510 hollow fiber Substances 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims description 16
- 238000007791 dehumidification Methods 0.000 claims description 15
- 229920006395 saturated elastomer Polymers 0.000 claims description 14
- 230000002209 hydrophobic effect Effects 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 2
- 230000003134 recirculating effect Effects 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention provides a flue gas condensation latent heat recovery and purification system based on mixed gas and hearth humidification. Comprises a waste heat recovery tower for recovering the waste heat of the flue gas and humidifying combustion air and fuel gas and a device for humidifying in a hearth. Heating and humidifying combustion-supporting air and fuel gas by using high-temperature recirculated flue gas and intermediate circulating water; the characteristics of the hollow fiber membrane component are utilized to realize the separation of water vapor from saturated flue gas, and then the separated water vapor without impurities is sprayed into the hearth to further humidify the mixed gas in the hearth. The mixed gas is humidified to increase the water content brought into the boiler, so that the water vapor pressure in the flue gas is increased, and the water dew point temperature of the flue gas is increased. The mixed gas can play the roles of reducing the combustion temperature and changing the flow field in the furnace, and finally realizes low-nitrogen combustion.
Description
Technical Field
The invention relates to the technical field of flue gas waste heat recovery and purification, in particular to a flue gas condensation latent waste heat recovery and purification system based on mixed gas and humidification in a hearth.
Background
In 2017, the natural gas energy consumption of China is 2373 billions of cubic meters, and the natural gas energy consumption is increased by 15.3 percent on the same scale. For Beijing City alone, the total consumption of natural gas was 160 billion cubic meters during 2017. Under the guidance of policies of 'changing coal into clean energy' and 'changing coal into gas', the gas heating proportion in Beijing city reaches 97% during the heating season. Meanwhile, in order to solve the civil problem caused by haze weather, new boiler emission standards are implemented in the Beijing city in 2017, 4 months and 4 days. The humidification of combustion air and fuel gas raises the water content in the boiler, raises the water vapor pressure in the fume and raises the water dew point temperature of the fume. After the water dew point temperature of the flue gas is increased, in the direct contact type heat exchanger, the flue gas starts to release latent heat of vaporization at a higher temperature, and more flue gas waste heat can be recovered compared with the case that the temperature of the flue gas is reduced to be lower. Meanwhile, air humidification can play a role in low-nitrogen combustion. When the combustion air and fuel gas of the boiler are humidified, on one hand, the concentration of nitrogen and oxygen in the air is bound to be reduced due to the rising of the content of water, and the concentration of the nitrogen and the oxygen can be reducedEffectively changing the air composition; on the other hand, the water content brought by the combustion air entering the boiler for combustion is increased, the combustion temperature is reduced, the flow field in the combustion chamber is changed, the form and the propagation characteristic of flame are influenced, and the reduction of NO is facilitatedXThe rate is generated.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: (1) how to realize the latent heat recovery of the flue gas under the condition that the return water temperature of the heat supply network is higher than the dew point of the flue gas; (2) reduce the emission of nitrogen oxides of the gas boiler.
In order to solve the technical problem, the invention provides a flue gas condensation latent waste heat recovery and purification system based on mixed gas and humidification in a hearth, which comprises a waste heat recovery tower and a device for humidifying in the hearth, and is characterized in that: the waste heat recovery tower is divided into three sections, namely a mixed gas humidifying section, a flue gas-medium circulating water heat exchange section and a flue gas dehumidifying section from bottom to top in sequence; the flue gas dehumidification section is an external pressure type membrane assembly consisting of hydrophobic hollow fiber membrane bundles.
Further, in the mixed gas humidifying section, the recirculated flue gas, the combustion air and the fuel gas are in countercurrent direct contact with the medium circulating water for heat exchange, and finally the mixture is fully mixed to reach a saturated state, and the mixed saturated gas is discharged from one side of the top of the mixed gas humidifying section and is introduced into the boiler for combustion.
Further, the humidity of the mixed saturated gas is controlled by a mixed gas humidity control device before the mixed saturated gas is discharged from the mixed gas humidifying section and is introduced into a boiler.
Further, the non-recirculated flue gas discharged from the boiler enters a flue gas-medium circulating water heat exchange section, is in direct contact with medium circulating water in a countercurrent manner for heat exchange, is cooled and humidified to become saturated flue gas, and then continuously rises to enter a flue gas dehumidification section; in the flue gas dehumidification section, saturated flue gas is separated by dry and wet, dry flue gas is discharged into the atmosphere, and separated water vapor enters a hearth humidifying device in the boiler to humidify the hearth.
Further, the external pressure type membrane module consisting of the hydrophobic hollow fiber membrane bundle of the flue gas dehumidification section enables the interior of the hollow fiber membrane bundle to be in a negative pressure vacuum state by using a vacuum pump connected with the flue gas dehumidification section, and the saturated flue gas is subjected to dry-wet separation in the membrane module by using the pressure difference between the interior and the exterior of the hollow fiber membrane bundle.
Further, medium circulating water is sprayed into the first spraying device at the top of the mixed gas humidifying section, and is discharged from the bottom; the discharged intermediate circulating water is sprayed in through a second spraying device on the top of the flue gas-intermediate circulating water heat exchange section, and then is discharged from the bottom of the flue gas-intermediate circulating water heat exchange section to exchange heat with the intermediate circulating water heat exchanger.
Furthermore, the first spraying device and the second spraying device are conical atomizing nozzles with large atomizing angles.
Furthermore, the mixed gas humidifying section D and the flue gas-intermediate circulating water heat exchange section C are separated by a partition plate.
Furthermore, the humidifying device 2 in the hearth is an atomizing nozzle or a water spraying disc.
Furthermore, the intermediate circulating water heat exchanger is a shell-and-tube heat exchanger and a plate heat exchanger.
The technical scheme of the invention has the following advantages:
(1) compared with the traditional air humidification type spray type flue gas waste heat recovery system, the system is used for exchanging heat and mass by introducing mixed fuel gas, flue gas and combustion air. Under the condition of equal total quantity of intermediate circulating water, the content of water vapor introduced into the hearth is increased, and low-temperature recirculating flue gas is introduced. Therefore, the dew point of the flue gas can be greatly improved, the combustion temperature in the hearth can be reduced, and the thermal NO can be inhibitedXIs generated.
(2) Compare the mode that traditional spray column utilized low temperature spray water to dehumidify, membrane type heat mass exchange section utilizes membrane material self characteristic to realize the dehumidification of saturated flue gas, can simplify system spray water flow, and through the recoverable vapor that does not contain impurity of membrane type heat mass exchange column, spout can reduce combustion temperature and can not cause the stove to corrode in the furnace again in spouting the furnace.
Drawings
The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the system of the present invention.
The component numbers and names in fig. 1 are as follows:
the system comprises a boiler 1, a hearth humidifying device 2, a vacuum pump 3, a fan 4, a flue gas three-way regulating valve 5, a waste heat recovery tower 6, a drainage heat exchange pump 7, an intermediate circulating water heat exchanger 8, heat supply network backwater 9, a mixed gas fan 10, a fuel gas inlet 11, a combustion-supporting air inlet 12, a first spraying device 13, a second spraying device 14, an intermediate circulating water pump 15, a mixed gas humidity control device 16, a vacuum hydrophobic membrane component 17, boiler exhaust gas A, non-circulating flue gas B, a flue gas-intermediate circulating water heat exchange section C, a mixed gas humidifying section D, combustion-supporting air E, fuel gas F, mixed gas G, a flue gas dehumidifying section H and circulating flue gas I.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in figure 1, the invention provides a flue gas condensation latent waste heat recovery and purification system based on mixed gas and humidification in a hearth. Comprises a waste heat recovery tower 6 for recovering the waste heat of the flue gas and humidifying the combustion air and the fuel gas, and a device 2 for humidifying in a hearth. The waste heat recovery tower 6 is divided into three sections, namely a mixed gas humidifying section D, a flue gas-medium circulating water heat exchange section C and a flue gas dehumidifying section H from bottom to top. The mixed gas humidifying section D is used for performing countercurrent direct contact heat exchange on the recirculated flue gas I, the combustion air E and the fuel gas F with intermediate circulating water; respectively entering the recycled flue gas I, the combustion air E and the fuel gas F from one side of the bottom of the mixed gas humidifying section D; the recirculated flue gas I, the combustion air E and the fuel gas F are fully mixed with the medium circulating water in the rising process of the mixed gas humidifying section D to finally reach a saturated state, one side of the top of the mixed saturated gas humidifying section D is discharged, and the mixed saturated gas mixed gas is introduced into the boiler 1 through the induced draft fan to be combusted. Wherein the mixed gas is discharged from the mixed gas humidifying section D, passes through the mixed gas humidity control device 16 and the mixed gas fan 10 in sequence and is finally introduced into the boiler 1 for combustion. Wherein the intermediate circulating water is sprayed into the first spraying device 13 at the top of the mixed gas humidifying section D and is discharged from the bottom; the intermediate circulating water is discharged from the mixed gas humidifying section D, is pressurized by an intermediate circulating water pump 15 and then is sprayed into the second spraying device 14 on the top of the flue gas-intermediate circulating water heat exchange section C; wherein the first and second spraying means 13, 14 are preferably conical atomizing nozzles with a large atomizing angle. The mixed gas humidifying section D and the flue gas-intermediate circulating water heat exchange section C are separated by a partition plate.
An inlet of the non-circulating flue gas B and a drainage heat exchange loop are arranged on one side of the bottom of the flue gas-medium circulating water heat exchange section C; wherein, the non-circulating flue gas B enters from one side of the bottom flue gas-medium circulating water heat exchange section C, is cooled and humidified by the medium circulating water to become saturated flue gas, and then continuously rises to enter the flue gas dehumidification section H; wherein the intermediate circulating water and the non-circulating flue gas B are in direct contact and heat exchange in a countercurrent manner, and an intermediate circulating water inlet is positioned at the top of the flue gas-intermediate circulating water heat exchange section C; the drainage heat exchange loop is sequentially provided with a drainage heat exchange pump 7 and an intermediate circulating water heat exchanger 8; the intermediate circulating water heat exchanger 8 can be a shell-and-tube heat exchanger or a plate heat exchanger.
The flue gas dehumidification section H is a vacuum hydrophobic membrane component 17, the vacuum hydrophobic membrane component 17 is an external pressure type membrane component formed by hydrophobic hollow fiber membrane bundles, the interior of the hollow fiber membrane bundles is in a negative pressure vacuum state by using a vacuum pump 3, the saturated flue gas is subjected to dry-wet separation in the membrane component by using the pressure difference between the interior and the exterior of the hollow fiber membrane bundles, the dry flue gas after dehumidification is discharged into the atmosphere, and the separated water vapor is pressurized by the vacuum pump 3 and then sprayed into the boiler 1 through a humidifying device 2 in the hearth; the vacuum hydrophobic membrane module 17 is preferably made of Polysulfone (PSF); the humidifying device 2 in the hearth is preferably an atomizing nozzle or a water spraying disc.
When the system works, the working process is as follows:
(1) flue gas flow: boiler exhaust gas A generated after combustion of the gas boiler 1 is divided into recirculation flue gas I and non-recirculation flue gas B through a flue gas three-way regulating valve 5. The non-circulating flue gas B is introduced from the bottom of a flue gas-medium circulating water C heat exchange section of the waste heat recovery tower 6, the non-circulating flue gas B is in direct countercurrent contact with medium circulating water sprayed by a second spraying device 14 at the top of the flue gas-medium circulating water heat exchange section C, the non-circulating flue gas B is cooled and humidified in the ascending process to reach a saturated state, the flue gas D after cooling and humidification continuously flows upwards through a demisting net and then enters the outer side of a membrane bundle of a flue gas dehumidification section H vacuum hydrophobic membrane component 17, the saturated flue gas passes through the membrane bundles arranged transversely from bottom to top, and water vapor in the saturated flue gas flows into the inner side of the membrane bundle along gaps in the membrane bundle under the pushing of the pressure difference between the inside and; the dehumidified dry flue gas is discharged into the atmosphere, and the separated water vapor is pressurized by a vacuum pump 3 and then sprayed into the boiler 1 through a humidifying device 2 in the hearth.
(2) Fuel gas, combustion air and recirculated flue gas flow: the combustion-supporting air E and the fuel gas F recycled flue gas I are introduced from one side of the bottom of the mixed gas humidifying section D and exchange heat with medium circulating water sprayed from a first spraying device 13 at the top of the mixed gas humidifying section D in the rising process; the combustion-supporting air E, the fuel gas F and the recirculated flue gas I are finally and fully mixed and reach a saturated state, the mixed saturated gas is discharged from the opposite side of the top of the mixed gas humidifying section D, and the mixed saturated gas is introduced into the boiler 1 for combustion through the mixed gas humidity control device 16 and the induced draft fan 10.
(3) An intermediate circulating water flow: the intermediate circulating water exchanges heat with the heat supply network backwater 9 through an intermediate circulating water heat exchanger 8, the intermediate circulating water after being cooled is sprayed from a first spraying device 13 at the top of the mixed gas humidifying section D and is in direct contact with the mixed gas from bottom to top in a countercurrent manner for heat exchange, and the heated intermediate circulating water falls into the bottom of the mixed gas humidifying section D; the medium circulating water at the bottom of the mixed gas humidifying section D is discharged, is pressurized by a medium circulating water pump 15, is sprayed from a spraying device 14 at the top of the flue gas-medium circulating water heat exchange section C, is directly contacted with the non-circulating flue gas B from bottom to top for heat exchange, falls into the bottom of the flue gas-medium circulating water heat exchange section C and is discharged from a water outlet at the bottom of the flue gas-medium circulating water heat exchange section C, is pressurized by a water discharge heat exchange pump 7 and is introduced into a medium circulating water heat exchanger 8.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811100695.5A CN109268861B (en) | 2018-09-20 | 2018-09-20 | Flue gas condensation latent waste heat recovery and purification system based on mixed gas and humidification in furnace |
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| CN201811100695.5A CN109268861B (en) | 2018-09-20 | 2018-09-20 | Flue gas condensation latent waste heat recovery and purification system based on mixed gas and humidification in furnace |
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| CN109268861B true CN109268861B (en) | 2020-04-07 |
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| CN111121077B (en) * | 2019-12-18 | 2021-11-09 | 北京建筑大学 | Flue gas treatment system with single-cold-source and double-cold-source operation modes |
| CN111059562B (en) * | 2019-12-31 | 2025-01-28 | 上海协能环保科技有限公司 | Low nitrogen condensation recirculation system and control method thereof |
| CN111207605A (en) * | 2020-02-27 | 2020-05-29 | 中国华能集团清洁能源技术研究院有限公司 | Device and method for realizing deep recovery of boiler flue gas waste heat and air humidification |
| CN113324260B (en) * | 2021-04-01 | 2022-08-30 | 昊姆（上海）节能科技有限公司 | Open type absorption and open type generation heat pump system and method for improving boiler efficiency |
| CN115342551A (en) * | 2022-08-23 | 2022-11-15 | 北京建筑大学 | A direct expansion heat pump type premixed humidification flue gas waste heat recovery and nitrogen reduction system |
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| US9863281B2 (en) * | 2015-12-08 | 2018-01-09 | Esko Olavi Polvi | Carbon dioxide capture interface for power generation facilities |
| CN107166420A (en) * | 2017-06-12 | 2017-09-15 | 清华大学 | Boiler exhaust gas the heat wet direct recovery method and device circulated based on vapor heat-carrying |
| CN107101220B (en) * | 2017-06-15 | 2023-08-15 | 中国科学院工程热物理研究所 | Method and system for reducing NOx emission of gas boiler |
| CN107559861B (en) * | 2017-09-08 | 2024-11-05 | 清华大学 | Three-tower heat exchange method and device based on boiler exhaust condensate heat transfer cycle |
| CN107631290B (en) * | 2017-09-14 | 2019-01-25 | 北京建筑大学 | A flue gas waste heat recovery system based on membrane absorption |
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