CN216432151U - A system for reducing the loss of steam pipe network by assuming cooling load - Google Patents

Abstract

The utility model discloses a system for reducing the pipe loss of a steam pipe network by assuming a cooling load, comprising a heat and power cogeneration unit, a steam supply main pipeline and an absorption refrigerator; the steam outlet of the heat and power cogeneration unit is connected with the inlet of the steam supply main pipe , the main steam supply pipeline is connected to the heating end of the absorption refrigerator, and the cooling end of the absorption refrigerator is connected to the user. The steam output by the cogeneration unit enters the heating end of the absorption chiller through the main steam supply pipeline, and the absorption chiller absorbs the heat of the steam for cooling and provides cooling to the user. By adopting the absorption cooling method to provide cooling for users and bear the cooling load of users, thus effectively expanding heat users, in summer, the electric energy required for air conditioning can be effectively saved, and the consumption of steam can be increased, thereby increasing the flow of steam pipe network. In this way, the pipe loss of the steam pipe network is greatly reduced, and energy saving and water saving are realized.

Description

A system for reducing the loss of steam pipe network by assuming cooling load

technical field

The utility model belongs to the field of steam heat utilization, and relates to a system for reducing the pipe loss of a steam pipe network by assuming a cooling load.

Background technique

Cogeneration of coal-fired units is the heating method with the highest energy utilization efficiency. Supplying steam to users by connecting steam heating pipes from coal-fired units can effectively improve energy utilization efficiency and reduce pollutant emissions. However, the existing steam pipe network is mainly used for steam and heat supply, and the users are relatively limited.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and to provide a system for reducing the pipe loss of the steam pipe network by assuming the cooling load, and assuming the cooling load of the user, thereby effectively expanding the heat users and increasing the flow of the steam pipe network, thereby greatly reducing the The pipe loss of the steam pipe network can realize energy saving and water saving.

In order to achieve the above object, the utility model adopts the following technical solutions to be realized:

A system for reducing pipe losses of steam pipe network by assuming cooling load, including cogeneration unit, steam supply main pipe and absorption chiller;

The steam outlet of the cogeneration unit is connected to the inlet of the main steam supply pipeline, the main steam supply pipeline is connected to the heating end of the absorption chiller, and the cooling end of the absorption chiller is connected to the user.

Preferably, the absorption refrigerator includes a generator, a condenser, an evaporator and an absorber;

The inlet of the heating end of the generator is connected to the main steam supply pipeline, and the outlet of the refrigerant of the generator is connected to the hot end of the condenser, the cold end of the evaporator and the solution inlet of the absorber in turn; the solution outlet of the generator is connected to the solution of the absorber. The inlet, the solution outlet of the absorber is connected to the solution inlet of the generator, and the hot end of the evaporator is connected to the user.

Further, a solution pump is arranged between the solution outlet of the absorber and the solution inlet of the generator.

Further, 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, a heating pipe is connected to the outlet of the heating end of the generator.

Preferably, the main steam supply pipe is provided with a branch port, the branch port is connected with the inlet of the steam supply branch pipe, and the outlet of the steam supply branch pipe is connected with the heat supply end of the absorption refrigerator.

Further, the steam supply sub-pipeline is provided with a flow regulating valve.

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

The utility model provides cooling for users by adopting the absorption refrigeration method and bears the cooling load of the users, thereby effectively expanding the heat users. In summer, the electric energy required by the air conditioner is effectively saved, and the consumption of steam is increased, thereby improving the steam pipe. Network flow, thereby greatly reducing the pipe loss of the steam pipe network and realizing energy saving and water saving.

Further, the steam is first used to drive the generator of the absorption refrigerator, and then used for heating, so as to realize the cascade utilization of heating steam.

Further, the flow regulating valve on the steam supply sub-pipeline can adjust the steam flow rate of the steam supply main pipe flowing into the steam supply sub-pipeline.

Description of drawings

FIG. 1 is a schematic diagram of the system structure of the present invention.

Among them: 1- cogeneration unit; 2- steam supply main pipeline; 3- steam supply sub-pipeline; 4- generator; 5- condenser; 6- evaporator; 7- absorber; 8- throttle valve; 9 -Circulation pump.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1, the utility model is a system for reducing the pipe loss of the steam pipe network by taking on the cooling load, including a cogeneration unit 1, a steam supply main pipeline 2, a steam supply sub-pipeline 3, a generator 4, a condenser 5. Evaporator 6, absorber 7, throttle valve 8 and circulating pump 9.

The steam outlet of the cogeneration unit 1 is connected to the inlet of the main steam supply pipeline 2, and the main steam supply pipeline 2 is provided with a branch port, the branch port is connected with the inlet of the steam supply sub-pipeline 3, and the outlet of the steam supply sub-pipeline 3 is connected. It is connected to the heating end of the absorption refrigerator, and the cooling end of the absorption refrigerator is connected to the user.

The steam supply sub-pipeline 3 is provided with a flow regulating valve, which can adjust the flow of steam flowing into the steam supply sub-pipeline 3 from the steam supply main pipe 2 .

The generator 4, the condenser 5, the evaporator 6, the absorber 7, the throttle valve 8 and the circulating pump 9 constitute an absorption refrigerator.

The inlet of the heating end of the generator 4 is connected with the main steam supply pipeline 2, and the outlet of the heating end of the generator 4 is connected with a heating pipeline. The refrigerant outlet end of the generator 4 is connected to the hot end of the condenser 5, the cold end of the evaporator 6 and the solution inlet of the absorber 7 in turn; the solution outlet of the generator 4 is connected to the solution inlet of the absorber 7, and the solution outlet of the absorber 7 Connect the solution inlet of the generator 4, and the hot end of the evaporator 6 is connected to the 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 the cooling medium of the condenser 5 and the cold end of the absorber 7 is cooling water.

The working process of the system for reducing the pipe loss of the steam pipe network by taking on the cooling load according to the utility model is as follows:

The steam output by the cogeneration unit 1 enters the heating end of the absorption refrigerator through the steam supply main pipeline 2, and the absorption refrigerator absorbs the heat of the steam for cooling, and provides cooling to the user.

The steam enters the hot end of the generator 4 through the steam supply sub-pipe 3, where the dilute solution with a certain concentration delivered by the solution pump 9 from the absorber 7 is heated in the generator 4, and most of the low boiling point in the dilute solution is cooled. The agent evaporates. The refrigerant vapor enters the hot end of the condenser 5, and is condensed into refrigerant liquid by the cooling medium in the cold end of the condenser 5, and then depressurized to the evaporation pressure through the throttle valve 8. The refrigerant enters the cold end of the evaporator 6 through throttling, absorbs the heat in the cooled system, that is, the heat at the hot end of the evaporator 6, and intensifies into the refrigerant vapor under the evaporation pressure. The hot end of the evaporator 6 is connected to the user for use. Provide cooling to users. The concentrated solution remaining in the generator 4 after the generation process enters the solution inlet of the absorber 7, mixes with the low-pressure refrigerant vapor from the outlet of the cold end of the evaporator 6, and absorbs the low-pressure refrigerant vapor and returns to the original concentration. . The absorption process is often an exothermic process, so it is necessary to use cooling water in the absorber 7 to cool the mixed solution. The solution whose concentration is restored in the absorber 7 is boosted by the solution pump 9 and then sent to the generator 4 to continue to circulate. By adopting the absorption cooling method to provide cooling for users and bear the cooling load of users, it can effectively expand heat users and increase the flow of steam pipe network, thereby greatly reducing the pipe loss of steam pipe network and realizing energy saving and water saving.

The steam outlet of generator 4 is used to supply steam to steam users. The steam is first used to drive the generator 4 of the absorption refrigerator, and then used for heating, so as to realize the cascade utilization of heating steam.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible to Modifications or equivalent replacements to the specific embodiments of the present invention, without departing from the spirit and scope of the present invention, should be included within the protection scope of the claims of the present invention.

Claims (8)

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.

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