CN114001490A - System for reducing steam pipe network loss by bearing cold load and working method - Google Patents
System for reducing steam pipe network loss by bearing cold load and working method Download PDFInfo
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- CN114001490A CN114001490A CN202111464148.7A CN202111464148A CN114001490A CN 114001490 A CN114001490 A CN 114001490A CN 202111464148 A CN202111464148 A CN 202111464148A CN 114001490 A CN114001490 A CN 114001490A
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- steam
- solution
- generator
- cold
- pipe network
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/006—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the sorption type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
- F25B49/043—Operating continuously
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- 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
Abstract
The invention discloses a system for reducing the loss of a steam pipe network by bearing cold load and a working method thereof, wherein the system comprises a cogeneration unit, a steam supply main pipeline and an absorption refrigerator; the steam outlet of the cogeneration unit is connected with the inlet of the main steam supply pipeline, the main steam supply pipeline is connected with the heat supply end of the absorption refrigerator, and the cold supply end of the absorption refrigerator is connected with a user. Steam output by the cogeneration unit enters a heat supply end of the absorption refrigerator through a main steam supply pipeline, and the absorption refrigerator absorbs heat of the steam to refrigerate and supply cold to users. The absorption refrigeration mode is adopted to supply cold for the user and bear the cold load of the user, so that the hot user is effectively expanded, the electric energy required by the air conditioner is effectively saved in summer, the using amount of steam is increased, the flow of a steam pipe network is increased, the pipe loss of the steam pipe network is greatly reduced, and energy and water conservation are realized.
Description
Technical Field
The invention belongs to the field of steam heat utilization, and relates to a system for reducing steam pipe network loss by bearing cold load and a working method.
Background
The coal-fired unit cogeneration is the heat supply mode with the highest energy utilization efficiency, and the steam heat supply pipeline connected out by the coal-fired unit supplies steam to users, so that the energy utilization efficiency can be effectively improved, and the pollutant emission is reduced. However, the existing steam pipe network is mainly used for supplying steam and heat, and users are limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a system and a working method for reducing the loss of a steam pipe network by bearing cold load, which bear the cold load of users, thereby effectively expanding hot users and improving the flow of the steam pipe network, thereby greatly reducing the pipe loss of the steam pipe network and realizing energy conservation and water conservation.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a system for reducing the loss of a steam pipe network by bearing cold load comprises a cogeneration unit, a steam supply main pipeline and an absorption refrigerator;
the steam outlet of the cogeneration unit is connected with the inlet of the main steam supply pipeline, the main steam supply pipeline is connected with the heat supply end of the absorption refrigerator, and the cold supply end of the absorption refrigerator is connected with a user.
Preferably, the absorption chiller comprises a generator, a condenser, an evaporator and an absorber;
the heat supply end inlet of the generator is connected with the main steam supply pipeline, and the refrigerant outlet end of the generator is sequentially connected with the hot end of the condenser, the cold end of the evaporator and the solution inlet of the absorber; the solution outlet of the generator is connected with the solution inlet of the absorber, the solution outlet of the absorber is connected with the solution inlet of the generator, and the hot end of the evaporator is connected with a user.
Further, a solution pump is arranged between the solution outlet of the absorber and the solution inlet of the generator.
Furthermore, a throttle valve is arranged between the hot end of the condenser and the cold end of the evaporator.
Further, the solution in the absorption refrigerator is a lithium bromide solution.
Preferably, the outlet of the heat supply end of the generator is connected with a heat supply pipeline.
Preferably, the main steam supply pipeline is provided with a branch port, the branch port is connected with an inlet of the branch steam supply pipeline, and an outlet of the branch steam supply pipeline is connected with a heat supply end of the absorption refrigerator.
Furthermore, a flow regulating valve is arranged on the steam supply branch pipeline.
A working method of the system for reducing the loss of the steam pipe network by bearing the cold load based on any one of the above, comprising the following processes:
steam output by the cogeneration unit enters a heat supply end of the absorption refrigerator through a main steam supply pipeline, and the absorption refrigerator absorbs heat of the steam to refrigerate and supply cold to users.
Preferably, the steam heats the dilute solution delivered from the absorber by the solution pump in the generator, and evaporates the refrigerant in the dilute solution, the dilute solution becomes the concentrated solution, the refrigerant steam enters the condenser, is condensed into refrigerant liquid by the cooling medium at the cold end of the condenser, then is depressurized to the evaporation pressure by the throttle valve, the refrigerant enters the evaporator by the throttle, absorbs the heat at the hot end of the evaporator, and is excited into the refrigerant steam under the evaporation pressure; the concentrated solution in the generator enters an absorber, is mixed with the low-pressure refrigerant vapor from the evaporator, absorbs the low-pressure refrigerant vapor and recovers the original concentration, and the dilute solution with the concentration recovered in the absorber is sent to the generator for continuous circulation after being boosted by a solution pump; the steam at the outlet of the heat supply end of the generator is used for supplying steam to steam users.
Compared with the prior art, the invention has the following beneficial effects:
the invention supplies cold for users by adopting an absorption refrigeration mode and bears the cold load of the users, thereby effectively expanding hot users, effectively saving the electric energy required by an air conditioner in summer, improving the use amount of steam, further improving the flow of a steam pipe network, greatly reducing the pipe loss of the steam pipe network and realizing energy and water conservation.
Furthermore, the steam is firstly used for driving a generator of the absorption refrigerator and then used for supplying heat, so that the cascade utilization of the heat supply steam is realized.
Furthermore, the flow regulating valve on the steam supply branch pipe can regulate the steam flow flowing into the steam supply branch pipe from the main steam supply pipe.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein: 1-cogeneration unit; 2-a main steam supply line; 3-a steam supply branch pipe; 4-a generator; 5-a condenser; 6-an evaporator; 7-an absorber; 8-a throttle valve; 9-circulating pump.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in FIG. 1, the system for reducing the loss of a steam pipe network by bearing a cooling load according to the invention comprises a cogeneration unit 1, a main steam supply pipeline 2, a branch steam supply pipeline 3, a generator 4, a condenser 5, an evaporator 6, an absorber 7, a throttle valve 8 and a circulating pump 9.
The steam outlet of the cogeneration unit 1 is connected with the inlet of the main steam supply pipeline 2, the main steam supply pipeline 2 is provided with a branch port, the branch port is connected with the inlet of the branch steam supply pipeline 3, the outlet of the branch steam supply pipeline 3 is connected with the heat supply end of the absorption refrigerator, and the cold supply end of the absorption refrigerator is connected with a user.
The steam supply branch pipe 3 is provided with a flow regulating valve which can regulate the flow of the steam flowing into the steam supply branch pipe 3 from the main steam supply pipe 2.
The generator 4, the condenser 5, the evaporator 6, the absorber 7, the throttle valve 8 and the circulating pump 9 form an absorption refrigerator.
The heat supply end inlet of the generator 4 is connected with the main steam supply pipeline 2, and the heat supply end outlet of the generator 4 is connected with the heat supply pipeline. The refrigerant outlet end of the generator 4 is sequentially connected with the hot end of the condenser 5, the cold end of the evaporator 6 and the solution inlet of the absorber 7; the solution outlet of the generator 4 is connected with the solution inlet of the absorber 7, the solution outlet of the absorber 7 is connected with the solution inlet of the generator 4, and the hot end of the evaporator 6 is connected with a user.
A solution pump 9 is arranged between the solution outlet of the absorber 7 and the solution inlet of the generator 4, and a throttle valve 8 is arranged between the hot end of the condenser 5 and the cold end of the evaporator 6.
The solution in the absorption refrigerator is lithium bromide solution, and cooling media at the cold ends of the condenser 5 and the absorber 7 adopt cooling water.
The working process of the system for reducing the loss of the steam pipe network by bearing the cold load comprises the following steps:
steam output by the cogeneration unit 1 enters a heat supply end of the absorption refrigerator through the main steam supply pipeline 2, and the absorption refrigerator absorbs heat of the steam to refrigerate and supply cold to users.
The steam enters the hot end of the generator 4 through the steam supply branch 3, heats the dilute solution with a certain concentration delivered from the absorber 7 by the solution pump 9 in the generator 4, and evaporates most of the low boiling point refrigerant in the dilute solution. The refrigerant vapor enters the hot end of the condenser 5, is condensed into refrigerant liquid by the cooling medium in the cold end of the condenser 5, and is reduced in pressure to evaporation pressure by the throttle valve 8. The refrigerant enters the cold end of the evaporator 6 through throttling, absorbs the heat in the cooled system, namely the heat at the hot end of the evaporator 6, and is excited into refrigerant vapor under the evaporation pressure, and the hot end of the evaporator 6 is connected with a user and used for supplying cold to the user. The concentrated solution remaining from the process in generator 4 enters the absorber 7 solution inlet, mixes with the low pressure refrigerant vapor exiting the evaporator 6 cold end outlet, and absorbs the low pressure refrigerant vapor and returns to its original concentration. The absorption process is often an exothermic process, so that the mixed solution needs to be cooled in the absorber 7 with cooling water. The solution with the concentration restored in the absorber 7 is boosted by the solution pump 9 and then sent to the generator 4 for continuous circulation. The absorption refrigeration mode is adopted to supply cold for the user and bear the cold load of the user, so that the hot user is effectively expanded, the flow of the steam pipe network is improved, the pipe loss of the steam pipe network is greatly reduced, and energy and water conservation are realized.
The steam outlet of the generator 4 is used for supplying steam to a steam user. The steam is firstly used for driving the generator 4 of the absorption refrigerator and then used for supplying heat, so that the cascade utilization of the heat supply steam is realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A system for reducing the loss of a steam pipe network by bearing cold load is characterized by comprising a cogeneration unit (1), a steam supply main pipeline (2) and an absorption refrigerator;
the steam outlet of the cogeneration unit (1) is connected with the inlet of the main steam supply pipeline (2), the main steam supply pipeline (2) is connected with the heat supply end of the absorption refrigerator, and the cold supply end of the absorption refrigerator is connected with a user.
2. The system for reducing the loss of a steam pipe network by bearing a cooling load according to claim 1, wherein the absorption chiller comprises a generator (4), a condenser (5), an evaporator (6) and an absorber (7);
the heat supply end inlet of the generator (4) is connected with the main steam supply pipeline (2), and the refrigerant outlet end of the generator (4) is sequentially connected with the hot end of the condenser (5), the cold end of the evaporator (6) and the solution inlet of the absorber (7); the solution outlet of the generator (4) is connected with the solution inlet of the absorber (7), the solution outlet of the absorber (7) is connected with the solution inlet of the generator (4), and the hot end of the evaporator (6) is connected with a user.
3. System for reducing steam pipe network losses by assuming a cooling load according to claim 2, characterized in that a solution pump (9) is arranged between the solution outlet of the absorber (7) and the solution inlet of the generator (4).
4. System for reducing steam pipe network losses by taking up cold load according to claim 2, characterized in that a throttle valve (8) is arranged between the warm end of the condenser (5) and the cold end of the evaporator (6).
5. The system for reducing vapor tube network losses by assuming a cooling load of claim 2, wherein the solution in the absorption chiller is a lithium bromide solution.
6. The system for reducing the damage of the steam pipe network by bearing the cold load according to claim 1, wherein the outlet of the heat supply end of the generator (4) is connected with a heat supply pipeline.
7. The system for reducing the loss of a steam pipe network by bearing a cold load according to claim 1, wherein the main steam supply pipe (2) is provided with a branch port, the branch port is connected with an inlet of the branch steam supply pipe (3), and an outlet of the branch steam supply pipe (3) is connected with a heat supply end of the absorption refrigerator.
8. The system for reducing the loss of a steam pipe network by bearing a cooling load according to claim 7, wherein the steam supply branch pipe (3) is provided with a flow regulating valve.
9. A method for operating a system for reducing the loss of a steam pipe network by taking over a cooling load according to any one of claims 1 to 8, comprising the steps of:
steam output by the cogeneration unit (1) enters a heat supply end of the absorption refrigerator through the main steam supply pipeline (2), and the absorption refrigerator absorbs heat of the steam to refrigerate and supply cold to users.
10. The method of claim 9, wherein the steam heats the dilute solution from the absorber (7) by the solution pump (9) in the generator (4), and evaporates the refrigerant in the dilute solution, the dilute solution becomes the concentrated solution, the refrigerant vapor enters the condenser (5), and is condensed into the refrigerant liquid by the cooling medium at the cold end of the condenser (5), and then is reduced to the evaporation pressure by the throttle valve (8), the refrigerant enters the evaporator (6) by throttling, absorbs the heat at the hot end of the evaporator (6), and is excited into the refrigerant vapor at the evaporation pressure; the concentrated solution in the generator (4) enters an absorber (7), is mixed with the low-pressure refrigerant vapor from the evaporator (6), absorbs the low-pressure refrigerant vapor and recovers the original concentration, and the dilute solution with the concentration recovered in the absorber (7) is sent to the generator (4) for continuous circulation after being boosted by a solution pump (9); the steam at the outlet of the heat supply end of the generator (4) is used for supplying steam to steam users.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111464148.7A CN114001490A (en) | 2021-12-02 | 2021-12-02 | System for reducing steam pipe network loss by bearing cold load and working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111464148.7A CN114001490A (en) | 2021-12-02 | 2021-12-02 | System for reducing steam pipe network loss by bearing cold load and working method |
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| CN114001490A true CN114001490A (en) | 2022-02-01 |
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| CN202111464148.7A Pending CN114001490A (en) | 2021-12-02 | 2021-12-02 | System for reducing steam pipe network loss by bearing cold load and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115682181A (en) * | 2022-09-19 | 2023-02-03 | 华能济南黄台发电有限公司 | Combined heat and power generation method for combined heat and cold supply |
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2021
- 2021-12-02 CN CN202111464148.7A patent/CN114001490A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115682181A (en) * | 2022-09-19 | 2023-02-03 | 华能济南黄台发电有限公司 | Combined heat and power generation method for combined heat and cold supply |
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Effective date of registration: 20220519 Address after: 102209 building a, Huaneng talent innovation and entrepreneurship base, future science and Technology City, Beiqijia Town, Changping District, Beijing Applicant after: HUANENG CLEAN ENERGY Research Institute Applicant after: Huaneng Yingkou Thermal Power Co., Ltd Address before: 102209 building a, Huaneng talent innovation and entrepreneurship base, Beiqijia future science and Technology City, Changping District, Beijing Applicant before: HUANENG CLEAN ENERGY Research Institute |
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