CN216432151U

CN216432151U - System for reducing steam pipe network loss by bearing cold load

Info

Publication number: CN216432151U
Application number: CN202123025858.8U
Authority: CN
Inventors: 彭烁; 周贤; 钟迪; 姚国鹏; 黄永琪; 安航; 白烨; 蔡浩飞; 王会
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Clean Energy Research Institute
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-05-03
Anticipated expiration: 2031-12-02

Abstract

The utility model discloses a system for reducing the loss of a steam pipe network by bearing cold load, which 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

System for reducing steam pipe network loss by bearing cold load

Technical Field

The utility model belongs to steam heat utilizes the field, relates to a system that reduces steam pipe network pipe and decreases through undertaking cold load.

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.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a system that reduces the loss of steam pipe network through undertaking the cold load, undertake user's cold load to effectively expand hot user, improve steam pipe network flow, thereby reduce the pipe loss of steam pipe network by a wide margin, realize energy-conserving water conservation.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

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.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses an adopt absorption refrigeration mode to supply cold for the user, undertake user's cold load to effectively expand hot user, when summer, effectively saved the required electric energy of air conditioner, and improve the use amount of steam, and then improve steam pipe network flow, thereby reduce the pipe loss of steam pipe network by a wide margin, realize energy-conserving 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 structure 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 present invention will be described in further detail with reference to the accompanying drawings:

as shown in figure 1, for the system that reduces the loss of steam pipe network through undertaking the cold load of the utility model, including cogeneration unit 1, steam supply main pipe 2, steam supply branch pipe 3, generator 4, condenser 5, evaporimeter 6, absorber 7, choke valve 8 and 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.

Through the working process who undertakes the system that cold load reduced steam pipe network loss does:

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 used to illustrate the technical solutions of the present invention and not to limit 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 of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.

Claims

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.