CN114427484A - Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy - Google Patents
Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy Download PDFInfo
- Publication number
- CN114427484A CN114427484A CN202111670806.8A CN202111670806A CN114427484A CN 114427484 A CN114427484 A CN 114427484A CN 202111670806 A CN202111670806 A CN 202111670806A CN 114427484 A CN114427484 A CN 114427484A
- Authority
- CN
- China
- Prior art keywords
- ammonia
- steam
- liquid ammonia
- exhaust
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
The invention provides a direct air cooling system utilizing ammonia cold energy in an ammonia-doped power plant, which belongs to the field of power station cooling, and comprises an exhaust steam condensing chamber, an exhaust steam distribution pipe, a liquid ammonia distribution pipe, a drain pipe, a condensation water tank, a direct cooling tower and an ammonia buffer tank, wherein the exhaust steam condensing chamber is provided with a liquid ammonia inlet and an exhaust steam inlet, and a liquid ammonia channel is also arranged in the exhaust steam condensing chamber; meanwhile, the outlet of the steam exhaust condensing chamber is respectively connected with a steam exhaust distribution pipe, a liquid ammonia distribution pipe and a drain pipe; each cooling unit in the direct cooling tower comprises an exhaust steam tube bundle and a liquid ammonia tube bundle for introducing exhaust steam and liquid ammonia, and each cooling unit is connected with a condensate pipe and an ammonia pipe; and meanwhile, the axial flow fan is arranged below the direct cooling tower and cools the exhausted steam through air heat exchange. The invention realizes twice heat exchange of exhaust steam and liquid ammonia, can reduce the outlet back pressure of the steam turbine, reduce the coal consumption rate, reduce the load of the direct cooling tower, further reduce the running number of the axial flow fan, and reduce the rotating speed of the axial flow fan so as to reduce the noise and the power consumption of a plant.
Description
Technical Field
The invention belongs to the field of power station cooling, and particularly relates to a direct air cooling system utilizing ammonia cooling energy in an ammonia-doped power plant.
Background
The northwest area of China is rich in coal and has a large amount of coal-fired power plants, but because of water resource shortage, a water cooling mode cannot be adopted to cool the dead steam of the steam turbine, so that the air cooling technology is widely applied to the power plants in the northwest area. The air cooling system is divided into a direct air cooling system and an indirect air cooling system, wherein the direct air cooling system means that steam discharged by a steam turbine flows into an outdoor air cooling condenser through a thick steam discharging pipeline, an axial flow cooling fan enables air to flow through the outer surface of a heat exchanger to condense the discharged steam into water, and the condensed water is pumped back to the boiler. However, the cooling limit of the air cooling system is the dry bulb temperature of the environment, which is higher than the cooling limit (wet bulb temperature) of the water cooling unit, so the backpressure of the air cooling unit is relatively high, the coal consumption of the unit becomes high, and the running economy is poor. In addition, the direct air cooling system needs an axial flow fan to perform forced ventilation, and has the defects of high noise and high service power.
The renewable resources such as wind energy, solar energy and the like in northwest regions are rich, and sufficient power resources are available for preparing synthetic ammonia, so that the method is very suitable for ammonia-coal co-combustion. After the coal-fired power plant is combusted by mixing ammonia, the required ammonia fuel is huge in mass, and the ammonia is usually transported to the power plant in the form of liquid ammonia and then gasified in the power plant. The liquid ammonia has large latent heat of vaporization, and a large amount of cold energy can be released in the gasification process. In the existing flue gas denitration technology, common methods for gasifying liquid ammonia are electric heating and steam exhaust heating. However, after ammonia is used as fuel, the consumption of ammonia in a power plant is greatly increased, and at the moment, if an electric heating method is adopted, the power consumption of the plant is seriously increased; and the adoption of the exhaust heating method can seriously reduce the output of the steam turbine. Meanwhile, the cold energy is also a resource and should be reasonably utilized.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a direct air cooling system utilizing ammonia cooling energy in an ammonia-doped power plant, and aims to solve the problems of high noise, high service power and high back pressure of a steam turbine of the conventional direct air cooling system.
In order to achieve the purpose, the invention provides a direct air cooling system utilizing ammonia cold energy in an ammonia-doped power plant, which comprises an exhaust steam condensation chamber, an exhaust steam distribution pipe, a liquid ammonia distribution pipe, a drain pipe, a condensation water tank, a direct cooling tower and an ammonia buffer tank, wherein the exhaust steam condensation chamber is provided with a liquid ammonia inlet and an exhaust steam inlet, the exhaust steam condensation chamber is internally provided with a liquid ammonia channel, the liquid ammonia inlet is connected with the liquid ammonia channel and used for introducing liquid ammonia, and the exhaust steam inlet is used for introducing exhaust steam into the exhaust steam condensation chamber; meanwhile, an outlet of the steam exhaust condensing chamber is respectively connected with a steam exhaust distributing pipe, a liquid ammonia distributing pipe and a drain pipe, when the steam exhaust condensing chamber works, the steam exhaust and the liquid ammonia carry out primary heat exchange in the steam exhaust condensing chamber, the steam exhaust and the liquid ammonia after heat exchange respectively enter the direct cooling tower through the steam exhaust distributing pipe and the liquid ammonia distributing pipe, and the generated condensed water enters a condensation water tank through the drain pipe;
the direct cooling tower comprises a preset number of cooling units, condensate pipes, ammonia pipes and axial flow fans, wherein each cooling unit comprises an exhaust pipe bundle and a liquid ammonia pipe bundle which are respectively used for introducing exhaust steam and liquid ammonia, and each cooling unit is connected with the condensate pipe and the ammonia pipe; and meanwhile, the axial flow fan is arranged below the direct cooling tower to cool the discharged steam in a mode of utilizing air convection heat exchange, so that direct air cooling by utilizing ammonia cooling energy is realized.
As a further preferred, the cooling unit comprises three rows of tube bundles arranged in parallel, wherein the tube bundles on both sides are steam exhaust tube bundles, and the tube bundle in the middle is a liquid ammonia tube bundle, so as to avoid frosting the surface of the liquid ammonia tube bundle.
As a further preference, the flow direction of the vapour exhaust tube bundle and the liquid ammonia tube bundle in the cooling unit is reversed.
As a further preferred option, the exhaust gas tube bundles and the liquid ammonia tube bundles in the cooling unit are arranged alternately.
Preferably, the cooling unit comprises a downstream cooling assembly and a counter-flow cooling assembly, wherein the steam exhaust tube bundle of the downstream cooling assembly is a downstream tube bundle, the upper end of the downstream tube bundle is connected with the steam exhaust distribution pipe, the lower end of the downstream tube bundle is connected with the condensate pipe, and the liquid ammonia tube bundle of the downstream cooling assembly is a counter-flow tube bundle, the upper end of the liquid ammonia tube bundle is connected with the ammonia gas pipe, and the lower end of the liquid ammonia tube bundle is connected with the liquid ammonia distribution pipe; the exhaust pipe bundle of the countercurrent cooling assembly is a countercurrent pipe bundle, the upper end of the countercurrent pipe bundle is sealed, the lower end of the countercurrent pipe bundle is connected with the condensate pipe, meanwhile, the liquid ammonia pipe bundle of the countercurrent cooling assembly is a concurrent pipe bundle, the upper end of the countercurrent pipe bundle is connected with the ammonia pipe, and the lower end of the countercurrent pipe bundle is sealed.
Further preferably, the concurrent cooling assemblies and the counter-flow cooling assemblies in the cooling unit are arranged at intervals, and the number of the concurrent cooling assemblies is larger than that of the counter-flow cooling assemblies.
According to another aspect of the invention, the application of the direct air cooling system utilizing the ammonia cooling energy in the ammonia-doped power plant is provided.
As a further preferred option, the liquid ammonia inlet is connected with a liquid ammonia storage tank through a liquid ammonia pump for introducing liquid ammonia; the exhaust steam inlet is connected with the steam turbine and is used for introducing exhaust steam; the condensed water tank is connected with the boiler through a feed pump to feed the condensed water into the boiler.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
1. the invention introduces the cold energy generated by gasifying the liquid ammonia into the direct air cooling system, provides energy for gasifying the liquid ammonia by utilizing the exhaust steam of the steam turbine, can realize the comprehensive utilization of the energy, meanwhile, the invention improves the structure of the direct air cooling system, realizes twice heat exchange between the exhaust steam and the liquid ammonia, wherein the exhausted steam and the liquid ammonia carry out the first heat exchange in the exhausted steam condensing chamber, thereby reducing the outlet back pressure of the steam turbine, reducing the coal consumption rate, reducing the load of the direct cooling tower and improving the operation economy, the discharged steam and the liquid ammonia are subjected to secondary heat exchange in the direct cooling tower and are cooled under the forced heat exchange of the axial flow fan, the sensitivity of the direct cooling tower to the environment can be reduced without being influenced by the external environment, the problem of reduction of the cooling capacity of the direct cooling tower in summer is solved, the running number of the axial flow fans can be further reduced, and the rotating speed of the axial flow fans is reduced so as to reduce noise and power consumption of a plant;
2. particularly, the arrangement mode of the tube bundle in the cooling unit is improved to form a hot-cold-hot tube bundle arrangement mode, so that the frosting on the outer surface of the liquid ammonia tube bundle can be avoided, and the heat transfer performance of the liquid ammonia tube bundle is effectively improved;
3. in addition, the downstream cooling assembly and the countercurrent cooling assembly are arranged in the cooling unit, wherein the downstream cooling assembly can exchange heat between the exhaust steam and the liquid ammonia, and the countercurrent cooling assembly can exchange heat between the exhaust steam in the condensate pipe and the liquid ammonia in the ammonia pipe, so that the exhaust steam can be completely converted into condensate water, the liquid ammonia can be completely converted into ammonia, and the cooling efficiency of the direct air cooling system is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a direct air cooling system utilizing ammonia cooling energy in an ammonia-doped power plant according to an embodiment of the present invention;
FIG. 2 is a left side view of a direct air cooling system utilizing ammonia cooling energy in an ammonia-doped power plant according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 4 is a schematic diagram of an application of a direct air cooling system using ammonia cold energy in an ammonia-doped power plant according to an embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-steam exhaust condensation chamber, 1.1-liquid ammonia inlet, 1.2-steam exhaust inlet, 2-direct cooling tower, 2.1-steam exhaust tube bundle, 2.2-liquid ammonia tube bundle, 3-hydrophobic tube, 4-liquid ammonia distribution tube, 5-condensation water tank, 6-condensation water tube, 7-axial flow fan, 8-steam exhaust distribution tube, 9-ammonia tube, 10-ammonia buffer tank, 11-liquid ammonia storage tank, 12-liquid ammonia pump, 13-hydrophobic pump, 14-water feed pump, 15-boiler, 16-steam turbine.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1, the present invention provides a direct air cooling system using ammonia cold energy in an ammonia-doped power plant, the system includes an exhaust steam condensation chamber 1, an exhaust steam distribution pipe 8, a liquid ammonia distribution pipe 4, a drain pipe 3, a condensation water tank 5, a direct cooling tower 2 and an ammonia buffer tank 10, the exhaust steam condensation chamber 1 is provided with a liquid ammonia inlet 1.1 and an exhaust steam inlet 1.2, the exhaust steam condensation chamber 1 is also internally provided with a liquid ammonia channel, one end of the liquid ammonia inlet 1.1 is connected with the liquid ammonia storage tank 11 through a liquid ammonia pump 12, the other end thereof is connected with the liquid ammonia channel for introducing liquid ammonia as a cold source, the exhaust steam inlet 1.2 is connected with a steam turbine 16 for introducing exhaust steam into the exhaust steam condensation chamber 1; meanwhile, an outlet of the steam exhaust condensation chamber 1 is respectively connected with a steam exhaust distribution pipe 8, a liquid ammonia distribution pipe 4 and a drain pipe 3, when the steam exhaust condensation chamber works, heat exchange is carried out on the steam exhaust and the liquid ammonia in a liquid ammonia channel for the first time in the steam exhaust condensation chamber 1, the temperature of the liquid ammonia rises, part of steam exhaust is condensed into condensed water, the steam exhaust and the liquid ammonia after heat exchange respectively enter the direct cooling tower 2 through the steam exhaust distribution pipe 8 and the liquid ammonia distribution pipe 4, and the generated condensed water enters a condensation water tank 5 through the drain pipe 3; the steam discharged by the steam turbine is subjected to primary heat exchange with liquid ammonia in the steam discharging condensation chamber, so that the back pressure of the outlet of the steam turbine can be reduced, the coal consumption rate is reduced, and the operation economy of a power plant is effectively improved;
the direct cooling tower 2 comprises a preset number of cooling units, condensate pipes 6, ammonia pipes 9 and axial flow fans 7, each cooling unit comprises an exhaust steam pipe bundle 2.1 and a liquid ammonia pipe bundle 2.2 which are respectively used for introducing exhaust steam and liquid ammonia, and each cooling unit is connected with the condensate pipe 6 and the ammonia pipe 9, when the direct cooling tower works, the introduced exhaust steam and liquid ammonia perform secondary heat exchange in the cooling units, the exhaust steam releases heat to be condensed into condensate water and enters the condensate water tank 5 through the condensate pipe 6, and the liquid ammonia absorbs heat to be gasified into ammonia gas and enters the ammonia buffer tank 10 through the ammonia pipe 9; meanwhile, the axial flow fan 7 is arranged below the direct cooling tower 2 to cool the discharged steam in a mode of utilizing air convection heat exchange, so that direct air cooling by utilizing ammonia cooling energy is realized.
According to the invention, a part of exhausted steam is cooled in the exhausted steam condensing chamber 1, so that the load of the direct cooling tower 2 is reduced, and simultaneously the problems of overhigh back pressure of the steam turbine 16, insufficient output of the direct cooling tower 2 and liquid ammonia gasification when the temperature is high in summer can be solved, the coal consumption rate can be reduced, and the generating efficiency and the operation economy of the unit can be improved; meanwhile, liquid ammonia is introduced into the direct air cooling system, the scale of the direct cooling tower 2 can be reduced, the number of the axial flow fans 7 is reduced, noise and power consumption of a plant are reduced, a large amount of construction cost and operation cost are saved, the economic benefit of the power plant is improved, the supply of ammonia cold energy is not affected by the external environment, the sensitivity of the direct cooling tower 2 to the environment is reduced, the problem of reduction of the cooling capacity of the direct cooling tower 2 can be relieved in summer, the rotating speed of the axial flow fans 7 can be further reduced or the operation number of the axial flow fans 7 can be reduced in winter, and comprehensive utilization of energy is realized.
Further, as shown in fig. 2 and 3, the cooling unit comprises three rows of tube bundles arranged in parallel and is arranged in a hot-cold-hot staggered mode, the tube bundles on two sides are steam exhaust tube bundles 2.1, the tube bundle in the middle is a liquid ammonia tube bundle 2.2, the temperature of air flowing through the liquid ammonia tube bundle 2.2 can be increased, meanwhile, the liquid ammonia tube bundle 2.2 receives heat radiated by the surrounding steam exhaust tube bundles 2.1, and the problem that the surface of the liquid ammonia tube bundle 2.2 is frosted is solved. During operation axial fan 7 makes the air flow from bottom to top, and the heat of exhaust is taken away through convection heat transfer to the air when the air flows through lower floor's exhaust tube bank 2.1, and the air temperature rises, and the air absorbs the cold energy that liquid ammonia tube bank 2.2 releases when flowing through liquid ammonia tube bank 2.2, and the air temperature descends, and last air continues to exchange heat with upper floor's exhaust tube bank 2.1, and the air temperature rises and discharges straight cold tower 2 to this realization convection heat transfer, and two rows of exhaust tube banks 2.1 still carry out the heat transfer through the mode of radiation with middle liquid ammonia tube bank 2.2 simultaneously. In order to ensure the heat exchange efficiency, the flow directions of the steam exhaust tube bundle 2.1 and the liquid ammonia tube bundle 2.2 in the cooling unit are opposite.
Further, the cooling unit comprises a downstream cooling assembly and a counter-current cooling assembly, wherein an exhaust pipe bundle 2.1 of the downstream cooling assembly is a downstream pipe bundle, the upper end of the downstream pipe bundle is connected with an exhaust steam distribution pipe 8, the lower end of the downstream pipe bundle is connected with a condensate pipe 6, a liquid ammonia pipe bundle 2.2 of the downstream cooling assembly is a counter-current pipe bundle, the upper end of the counter-current pipe bundle is connected with an ammonia pipe 9, the lower end of the counter-current pipe bundle is connected with a liquid ammonia distribution pipe 4, when the cooling unit works, exhaust steam is sent from the upper end of the exhaust pipe bundle 2.1 by the exhaust steam distribution pipe 8, liquid ammonia is sent from the liquid ammonia distribution pipe 4, heat exchange is carried out in an air convection and radiation mode, generated condensate water enters a condensate water tank 5 through the condensate pipe 6, and ammonia enters an ammonia buffer tank 10 through the ammonia pipe 9; the steam exhaust tube bundle 2.1 of the countercurrent cooling assembly is a countercurrent tube bundle, the upper end of the countercurrent tube bundle is sealed, the lower end of the countercurrent cooling assembly is connected with the condensate pipe 6, meanwhile, the liquid ammonia tube bundle 2.2 of the countercurrent cooling assembly is a concurrent tube bundle, the upper end of the countercurrent cooling assembly is connected with the ammonia tube 9, the lower end of the countercurrent cooling assembly is sealed, a small amount of uncondensed steam exhaust in the condensate pipe 6 enters from the lower end of the steam exhaust tube bundle 2.1 during operation, a small amount of unvaporized liquid ammonia in the ammonia tube 9 enters from the upper end of the liquid ammonia tube bundle 2.2, heat exchange is carried out in an air convection and radiation mode, generated condensate water enters the condensate water tank 5 through the condensate pipe 6, and ammonia enters the ammonia buffer tank 10 through the ammonia tube 9, so that the steam exhaust and the liquid ammonia are completely converted into condensate water and ammonia.
Further, the concurrent cooling assemblies and the counter-flow cooling assemblies in the cooling unit are arranged at intervals, and the number of the concurrent cooling assemblies is larger than that of the counter-flow cooling assemblies.
According to another aspect of the present invention, as shown in fig. 4, there is provided the use of the above-mentioned direct air cooling system using ammonia cold energy in an ammonia-mixed power plant, wherein a liquid ammonia inlet 1.1 is connected to a liquid ammonia storage tank 11 through a liquid ammonia pump 12 for feeding liquid ammonia; the exhaust steam inlet 1.2 is connected with a steam turbine 16 and is used for introducing exhaust steam; the condensate tank 5 is connected to a boiler 15 by a feed pump 14 to feed condensate to the boiler 15. The working process of the direct air cooling system in the ammonia-doped power plant is as follows: liquid ammonia in a liquid ammonia storage tank 11 is sent into an exhaust steam condensation chamber 1 by a liquid ammonia pump 12, meanwhile, exhaust steam of a steam turbine 16 enters the exhaust steam condensation chamber 1 to exchange heat with the liquid ammonia for the first time, and a part of the exhaust steam is firstly condensed into condensed water and sent into a condensed water tank 5 by a drain pump 13; liquid ammonia and remaining exhaust steam enter into the direct cooling tower 2 and carry out the heat transfer for the second time, the exhaust steam cooling condenses and flows into the condensate tank 5, the condensate water is carried by the feed pump 14 and is heated into steam in the boiler 15 to accomplish in getting into the steam turbine 16 and do the circulation and generate the exhaust steam, and liquid ammonia absorbs thermal gasification and gets into ammonia buffer tank 10 for the ammonia that lasts stable is provided for the burning, also can supply the SCR system to use.
Because the latent heat of vaporization of the liquid ammonia is 1332.9kJ/kg, in a 600MW generator set, when the ammonia doping proportion reaches 50%, about 8% of steam turbine exhaust can be condensed; each unit is provided with 56 axial flow fans, which is equivalent to 4.2 axial flow fans; each power is calculated according to 110KW, the annual utilization time is 5500 hours, the power of the axial flow fan can be saved by about 2541MW every year, and the energy-saving effect and the economic benefit are obvious.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The direct air cooling system for utilizing ammonia cold energy in the ammonia-doped power plant is characterized by comprising an exhaust steam condensation chamber (1), an exhaust steam distribution pipe (8), a liquid ammonia distribution pipe (4), a drain pipe (3), a condensation water tank (5), a direct cooling tower (2) and an ammonia buffer tank (10), wherein the exhaust steam condensation chamber (1) is provided with a liquid ammonia inlet (1.1) and an exhaust steam inlet (1.2), a liquid ammonia channel is further arranged inside the exhaust steam condensation chamber (1), the liquid ammonia inlet (1.1) is connected with the liquid ammonia channel and used for introducing liquid ammonia, and the exhaust steam inlet (1.2) is used for introducing exhaust steam into the exhaust steam condensation chamber (1); meanwhile, an outlet of the steam exhaust condensation chamber (1) is respectively connected with a steam exhaust distribution pipe (8), a liquid ammonia distribution pipe (4) and a drain pipe (3), steam exhaust and liquid ammonia carry out primary heat exchange in the steam exhaust condensation chamber (1) during working, the steam exhaust and liquid ammonia after heat exchange respectively enter the direct cooling tower (2) through the steam exhaust distribution pipe (8) and the liquid ammonia distribution pipe (4), and generated condensed water enters a condensation water tank (5) through the drain pipe (3);
the direct cooling tower (2) comprises a preset number of cooling units, condensed water pipes (6), ammonia pipes (9) and axial flow fans (7), each cooling unit comprises an exhaust steam pipe bundle (2.1) and a liquid ammonia pipe bundle (2.2) which are respectively used for introducing exhaust steam and liquid ammonia, each cooling unit is connected with the condensed water pipes (6) and the ammonia pipes (9), the exhaust steam and the liquid ammonia introduced during working exchange heat for the second time in the cooling units, and the generated condensed water and ammonia are respectively sent into the condensed water tank (5) and an ammonia buffer tank (10) through the condensed water pipes (6) and the ammonia pipes (9); and meanwhile, the axial flow fan (7) is arranged below the direct cooling tower (2) to cool the exhausted steam in a mode of air convection heat exchange, so that direct air cooling by utilizing ammonia cooling energy is realized.
2. The direct air cooling system for ammonia cooling energy utilization in an ammonia-doped power plant according to claim 1, characterized in that the cooling unit comprises three rows of parallel tube bundles, wherein the tube bundles on both sides are steam exhaust tube bundles (2.1) and the tube bundle in the middle is liquid ammonia tube bundle (2.2), so as to avoid frosting of the surface of the liquid ammonia tube bundle (2.2).
3. The direct air cooling system for ammonia cooling energy utilization in an ammonia-doped power plant according to claim 1, characterized in that the flow direction of the exhaust tube bundle (2.1) and the flow direction of the liquid ammonia tube bundle (2.2) in the cooling unit are opposite.
4. The direct air cooling system for the power plant with ammonia mixing function of claim 1, characterized in that the exhaust pipe bundle (2.1) and the liquid ammonia pipe bundle (2.2) of the cooling unit are arranged alternately.
5. The direct air cooling system for utilizing ammonia cold energy in the ammonia-doped power plant according to any one of claims 1 to 4, wherein the cooling unit comprises a concurrent cooling component and a countercurrent cooling component, wherein the steam exhaust tube bundle (2.1) of the concurrent cooling component is a concurrent tube bundle, the upper end of the concurrent tube bundle is connected with the steam exhaust distribution pipe (8), the lower end of the concurrent tube bundle is connected with the condensate water pipe (6), meanwhile, the liquid ammonia tube bundle (2.2) of the concurrent cooling component is a countercurrent tube bundle, the upper end of the countercurrent tube bundle is connected with the ammonia gas pipe (9), and the lower end of the countercurrent tube bundle is connected with the liquid ammonia distribution pipe (4); the steam exhaust tube bundle (2.1) of the countercurrent cooling assembly is a countercurrent tube bundle, the upper end of the countercurrent tube bundle is sealed, the lower end of the countercurrent tube bundle is connected with the condensed water tube (6), meanwhile, the liquid ammonia tube bundle (2.2) of the countercurrent cooling assembly is a concurrent tube bundle, the upper end of the countercurrent tube bundle is connected with the ammonia tube (9), and the lower end of the countercurrent tube bundle is sealed.
6. The direct air cooling system for utilizing ammonia cooling energy in an ammonia-doped power plant of claim 5, wherein the forward flow cooling modules and the counter flow cooling modules are arranged at intervals in the cooling unit, and the number of the forward flow cooling modules is larger than that of the counter flow cooling modules.
7. The application of the direct air cooling system utilizing ammonia cold energy as claimed in any one of claims 1 to 6 in an ammonia-doped power plant.
8. An ammonia-blending plant according to claim 7, characterized in that the liquid ammonia inlet (1.1) is connected to a liquid ammonia tank (11) by means of a liquid ammonia pump (12) for the introduction of liquid ammonia; the exhaust steam inlet (1.2) is connected with a steam turbine (16) and is used for introducing exhaust steam; the condensate tank (5) is connected to a boiler (15) by a feed pump (14) to feed condensate to the boiler (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670806.8A CN114427484B (en) | 2021-12-31 | 2021-12-31 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670806.8A CN114427484B (en) | 2021-12-31 | 2021-12-31 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114427484A true CN114427484A (en) | 2022-05-03 |
| CN114427484B CN114427484B (en) | 2022-12-02 |
Family
ID=81312185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111670806.8A Active CN114427484B (en) | 2021-12-31 | 2021-12-31 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114427484B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575532A (en) * | 2009-06-22 | 2012-07-11 | 艾克竣电力系统股份有限公司 | System and method for managing thermal issues in one or more industrial processes |
| CN103055673A (en) * | 2013-01-06 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Flue gas denitration and power generation system cold energy comprehensive utilization system |
| CN103754894A (en) * | 2013-12-21 | 2014-04-30 | 中盐安徽红四方股份有限公司 | Novel method for recycling ammonia synthesis cold energy in synthetic ammonia system |
| CN104533545A (en) * | 2014-12-27 | 2015-04-22 | 西安热工研究院有限公司 | Novel air cooling system |
| CN205677679U (en) * | 2016-06-15 | 2016-11-09 | 中科瑞奥能源科技股份有限公司 | Residual neat recovering system with liquefied ammonia as medium |
| CN107044650A (en) * | 2017-02-06 | 2017-08-15 | 国网安徽省电力公司电力科学研究院 | A kind of thermal power plant's liquefied ammonia denitration steam turbine combines energy saving circulating system |
| CN206959383U (en) * | 2017-06-21 | 2018-02-02 | 中国石油天然气股份有限公司 | A kind of energy-conservation ammonia cooling system of ketone-benzol dewaxing device |
| CN207131473U (en) * | 2016-06-09 | 2018-03-23 | 通用电气公司 | Hot-pipe system and gas turbine system for gas turbine system |
| CN210483828U (en) * | 2019-09-09 | 2020-05-08 | 王金龙 | Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant |
-
2021
- 2021-12-31 CN CN202111670806.8A patent/CN114427484B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575532A (en) * | 2009-06-22 | 2012-07-11 | 艾克竣电力系统股份有限公司 | System and method for managing thermal issues in one or more industrial processes |
| CN103055673A (en) * | 2013-01-06 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Flue gas denitration and power generation system cold energy comprehensive utilization system |
| CN103754894A (en) * | 2013-12-21 | 2014-04-30 | 中盐安徽红四方股份有限公司 | Novel method for recycling ammonia synthesis cold energy in synthetic ammonia system |
| CN104533545A (en) * | 2014-12-27 | 2015-04-22 | 西安热工研究院有限公司 | Novel air cooling system |
| CN207131473U (en) * | 2016-06-09 | 2018-03-23 | 通用电气公司 | Hot-pipe system and gas turbine system for gas turbine system |
| CN205677679U (en) * | 2016-06-15 | 2016-11-09 | 中科瑞奥能源科技股份有限公司 | Residual neat recovering system with liquefied ammonia as medium |
| CN107044650A (en) * | 2017-02-06 | 2017-08-15 | 国网安徽省电力公司电力科学研究院 | A kind of thermal power plant's liquefied ammonia denitration steam turbine combines energy saving circulating system |
| CN206959383U (en) * | 2017-06-21 | 2018-02-02 | 中国石油天然气股份有限公司 | A kind of energy-conservation ammonia cooling system of ketone-benzol dewaxing device |
| CN210483828U (en) * | 2019-09-09 | 2020-05-08 | 王金龙 | Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant |
Non-Patent Citations (1)
| Title |
|---|
| 赵波等: "氨朗肯循环间接空冷系统运行优化与生命周期评价", 《中国电机工程学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114427484B (en) | 2022-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11821637B2 (en) | Energy-saving system using electric heat pump to deeply recover flue gas waste heat from heat power plant for district heating | |
| DK2933484T3 (en) | SUPPLEMENTARY SOL-BIOMASS HEAT POWER SYSTEM | |
| CN103727703B (en) | A kind of recycling cold, heat and power triple supply system | |
| CN105048960B (en) | The energy composite energy of absorption heat pump based on photovoltaic back waste heat recovery utilizes device | |
| CN108131867A (en) | A kind of natural gas smoke waste heat all recovering device | |
| CN101776400A (en) | Forced-draft direct water film evaporative air-cooling condensor system | |
| CN208365871U (en) | A kind of natural gas smoke waste heat all recovering device | |
| CN101776401A (en) | Air-cooled steam condensing system with natural ventilation and direct water film evaporation | |
| CN102393153A (en) | Condensation mode and condensing unit of steam turbine set used in summer peak | |
| CN201715544U (en) | Flue gas waste heat recovery system | |
| CN110273722A (en) | A kind of thermal power plant's concrete heat accumulation peak regulation system and method | |
| CN102809144B (en) | Device and method for using two-stage jet absorption heat pump to improve thermal cycle efficiency | |
| CN102620478A (en) | Method and device for improving thermal circulation efficiency | |
| CN207776921U (en) | A kind of CHP Heating System based on absorption heat pump cycle | |
| CN114427484B (en) | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy | |
| CN106091380A (en) | A kind of biomass combustion heat-driven absorption organic Rankine bottoming cycle distributed triple-generation system | |
| CN202253581U (en) | Energy-saving softened water heating device for thermal power plant | |
| CN202813542U (en) | Waste heat extracting and heat supply stepped heating system in power plant | |
| CN215062308U (en) | Condensate water supplementary heating system under low-pressure cylinder zero-output operation mode | |
| CN211038763U (en) | Heating device utilizing waste heat of power plant | |
| CN209116822U (en) | A kind of residual heat of electric power plant and clean energy resource utilization system | |
| CN113624027A (en) | System and method for reducing summer operation backpressure of indirect air cooling unit | |
| CN113958992A (en) | Biomass cogeneration flue gas waste heat recycling system and method | |
| CN202521950U (en) | Device for improving efficiency of thermal cycle of thermal power plant or nuclear power plant | |
| CN108105784B (en) | Low-temperature waste heat recovery system and method for waste incineration power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |