Feed pump turbine steam exhaust and heat supply system coupled with steam compressor

Abstract

The utility model discloses a steam exhaust and heat supply system of a water-feeding pump turbine coupled with a steam compressor. The steam exhaust and heat supply system comprises the water-feeding pump turbine, a main turbine, the steam compressor and a superheated steam pipeline, an outlet of the superheated steam pipeline is communicated with an inlet of the water feeding pump turbine, an outlet of the water feeding pump turbine is communicated with an inlet of the steam compressor, an outlet of the steam compressor is divided into two paths, one path is communicated with an inlet of a heat user, and the other path is communicated with an inlet of the main turbine. The system can realize the waste heat utilization of the dead steam discharged by the steam turbine.

Description

Technical Field

[0001] The utility model belongs to the field of waste heat utilization of steam turbines in thermal power generating units, and relates to an exhaust steam heating system for a feed water steam turbine coupled with a steam compressor. Background Art

[0002] During the normal operation of thermal power units, a large amount of exhausted steam that has done work in the steam turbine is discharged into the condenser, resulting in a large waste of steam waste heat. At the same time, the discharge of a large amount of steam containing heat into the condenser will also cause an increase in the heat load of the condenser, which to a certain extent affects the power generation efficiency of the unit. In addition, along with the demands of industrial enterprises and urban residents for industrial steam and residential heating, some pure condensing units are gradually transformed into heating units. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned disadvantages of the prior art, and provides an exhaust steam heating system for a feed water steam turbine coupled with a steam compressor, which can realize the waste heat utilization of the exhausted steam discharged from the steam turbine.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] On the one hand, the utility model provides an exhaust steam heating system for a feed water steam turbine coupled with a steam compressor, including a feed water steam turbine, a main steam turbine, a steam compressor and a superheated steam pipeline;

[0006] The outlet of the superheated steam pipeline is connected to the inlet of the feed water steam turbine, the outlet of the feed water steam turbine is connected to the inlet of the steam compressor, and the outlet of the steam compressor is divided into two paths, one of which is connected to the inlet of the heat user, and the other is connected to the inlet of the main steam turbine.

[0007] The improvement of the exhaust steam heating system for the feed water steam turbine coupled with the steam compressor of the utility model is further as follows:

[0008] Further, the outlet of the feed water steam turbine is connected to the inlet of the steam compressor through an exhaust steam valve from the feed water steam turbine to the steam compressor.

[0009] Further, it also includes a motor, and the drive shaft of the steam compressor is connected to the motor.

[0010] Further, the steam compressor is coaxially connected to the motor.

[0011] Further, the outlet of the steam compressor is connected to the heat user and the main steam turbine through a steam compressor outlet control valve.

[0012] Further, the outlet control valve of the steam compressor is connected to the heat user and the main steam turbine through the check valve at the outlet of the steam compressor.

[0013] Further, a condenser is further included, and the outlet of the feed water pump steam turbine is communicated with the inlet of the condenser.

[0014] Further, the outlet of the feed water pump steam turbine is communicated with the inlet of the condenser through the exhaust valve from the feed water pump steam turbine to the condenser.

[0015] Further, a condenser is further included. The outlet of the feed water pump steam turbine is communicated with the inlet of the condenser through the exhaust valve from the feed water pump steam turbine to the condenser, and the outlet of the feed water pump steam turbine is communicated with the inlet of the steam compressor through the exhaust valve from the feed water pump steam turbine to the steam compressor.

[0016] Further, the outlet of the steam compressor is connected to the heat user and the main steam turbine through the outlet control valve of the steam compressor and the check valve at the outlet of the steam compressor.

[0017] Further, a controller is further included, and the controller is connected to the control end of the exhaust valve from the feed water pump steam turbine to the condenser, the control end of the exhaust valve from the feed water pump steam turbine to the steam compressor, and the control end of the outlet control valve of the steam compressor.

[0018] The utility model has the following beneficial effects:

[0019] When the exhaust heat supply system of the feed water pump steam turbine coupled with the steam compressor of the utility model is in specific operation, the exhaust steam discharged from the feed water pump steam turbine enters the steam compressor to be pressurized and heated to parameters matching the industrial steam, and then is divided into two paths. One path enters the heat user, and the other path enters the main steam turbine. On the one hand, it can improve the industrial steam supply capacity of the unit. On the other hand, it can reduce the heat load of the condenser of the unit and improve the efficiency of the unit. The structure is simple, the operation is convenient, and the practicability is extremely strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings forming a part of this specification are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0021] Figure 1 is the structural diagram of the utility model.

[0022] Wherein, 1 is the feed water pump steam turbine, 2 is the main steam turbine, 3 is the steam compressor, 4 is the motor, 5 is the exhaust valve from the feed water pump steam turbine to the condenser, 6 is the exhaust valve from the feed water pump steam turbine to the steam compressor, 7 is the outlet control valve of the steam compressor, and 8 is the check valve at the outlet of the steam compressor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solution in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of the embodiments, and are not intended to limit the scope of the disclosure of the present utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessarily confusing the concepts disclosed in the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0024] The schematic structural diagrams according to the disclosed embodiments of the present utility model are shown in the accompanying drawings. These figures are not drawn to scale, and for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are only exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0025] Embodiment 1

[0026] Reference Figure 1 , the exhaust steam heating system of the feed water turbine coupled with the steam compressor according to the present utility model includes a feed water turbine 1, a main steam turbine 2, a steam compressor 3, an electric motor 4, an exhaust steam valve 5 from the feed water turbine to the condenser, an exhaust steam valve 6 from the feed water turbine to the steam compressor, a control valve 7 at the outlet of the steam compressor, and a check valve 8 at the outlet of the steam compressor;

[0027] The outlet of the superheated steam pipeline is connected to the inlet of the feed water turbine 1, the outlet of the feed water turbine 1 is connected to the inlet of the steam compressor 3, and the outlet of the steam compressor 3 is divided into two paths, one of which is connected to the inlet of the heat user, and the other is connected to the inlet of the main steam turbine 2.

[0028] As an implementation manner of the present utility model, the outlet of the feed water turbine 1 is connected to the inlet of the steam compressor 3 through the exhaust steam valve 6 from the feed water turbine to the steam compressor.

[0029] As an implementation manner of the present utility model, the drive shaft of the steam compressor 3 is connected to the electric motor 4.

[0030] As an implementation manner of the present utility model, the outlet of the steam compressor 3 is connected to the heat user and the main steam turbine 2 through the control valve 7 at the outlet of the steam compressor.

[0031] As an embodiment of the present utility model, the outlet control valve 7 of the steam compressor is connected to the heat user and the main steam turbine 2 via the check valve 8 at the outlet of the steam compressor.

[0032] As an embodiment of the present utility model, the outlet of the feed water pump steam turbine 1 is communicated with the inlet of the condenser.

[0033] As an embodiment of the present utility model, the outlet of the feed water pump steam turbine 1 is communicated with the inlet of the condenser via the exhaust valve 5 from the feed water pump steam turbine to the condenser.

[0034] As an embodiment of the present utility model, the steam compressor 3 is coaxially connected to the motor 4.

[0035] As an embodiment of the present utility model, the present utility model further includes a controller, and the controller is connected to the control end of the exhaust valve 5 from the feed water pump steam turbine to the condenser, the control end of the exhaust valve 6 from the feed water pump steam turbine to the steam compressor, and the control end of the outlet control valve 7 of the steam compressor.

[0036] Embodiment Two

[0037] Reference Figure 1 , this embodiment discloses a working method of a feed water pump steam turbine exhaust heat supply system coupled with a steam compressor. The feed water pump steam turbine exhaust heat supply system coupled with the steam compressor includes a feed water pump steam turbine 1, a controller, a condenser, a main steam turbine 2, a steam compressor 3, and a superheated steam pipeline; the outlet of the superheated steam pipeline is communicated with the inlet of the feed water pump steam turbine 1, the outlet of the feed water pump steam turbine 1 is communicated with the inlet of the steam compressor 3, the outlet of the steam compressor 3 is divided into two paths, one path is communicated with the inlet of the heat user, and the other path is communicated with the inlet of the main steam turbine 2.

[0038] The outlet of the feed water pump steam turbine 1 is communicated with the inlet of the condenser via the exhaust valve 5 from the feed water pump steam turbine to the condenser, and the outlet of the feed water pump steam turbine 1 is communicated with the inlet of the steam compressor 3 via the exhaust valve 6 from the feed water pump steam turbine to the steam compressor; the outlet of the steam compressor 3 is connected to the heat user and the main steam turbine 2 via the outlet control valve 7 of the steam compressor and the check valve 8 at the outlet of the steam compressor; the controller is connected to the control end of the exhaust valve 5 from the feed water pump steam turbine to the condenser, the control end of the exhaust valve 6 from the feed water pump steam turbine to the steam compressor, and the control end of the outlet control valve 7 of the steam compressor.

[0039] Specifically, the working method of the feed water pump steam turbine exhaust heat supply system coupled with the steam compressor in this embodiment includes the following steps:

[0040] The feed water pump steam turbine 1 is driven by superheated steam. The exhausted steam after doing work can be discharged to the condenser through the exhaust valve 5 of the feed water pump steam turbine to the condenser, or can enter the steam compressor 3 through the exhaust valve 6 of the feed water pump steam turbine to the steam compressor. When the exhausted steam is to enter the steam compressor 3, first open the exhaust valve 6 of the feed water pump steam turbine to the steam compressor with a small opening to warm up the steam compressor 3 to ensure the equipment safety during the operation of the steam compressor 3. The steam compressor 3 is driven by the motor 4 to make the steam compressor 3 work normally. During the process of gradually switching the exhaust steam of the feed water pump steam turbine 1 to the steam compressor 3, gradually fully open the exhaust valve 6 of the feed water pump steam turbine to the steam compressor, and gradually close the exhaust valve 5 of the feed water pump steam turbine to the condenser. The steam heated and pressurized in the steam compressor 3 is collected into the industrial steam supply pipeline of the main steam turbine 2 through the steam compressor outlet control valve 7 and the steam compressor outlet check valve 8 to improve the steam supply capacity of the unit to the outside. The steam compressor outlet control valve 7 can adjust the steam supply flow by adjusting the opening degree, and the steam compressor outlet check valve 8 can prevent the steam in the heat supply pipeline of the main steam turbine 2 from flowing back to the steam compressor 3 when the steam compressor 3 stops.

[0041] It should be noted that the utility model utilizes the steam compressor 3 to heat up and pressurize the exhausted steam after the feed water pump steam turbine 1 does work to parameters matching the industrial steam. On the one hand, it can improve the industrial steam supply capacity of the unit, and on the other hand, it can reduce the heat load of the condenser of the unit and improve the unit efficiency.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit them. Although the utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: still can modify the specific implementation manners of the utility model or make equivalent replacements, and any modification or equivalent replacement without departing from the spirit and scope of the utility model should be covered within the protection scope of the claims of the utility model.

Claims

1. A feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor, characterized in that: It comprises a feedwater pump steam turbine (1), a main steam turbine (2), a steam compressor (3) and a superheated steam pipeline; The outlet of the superheated steam pipeline is connected to the inlet of the feedwater pump turbine (1), the outlet of the feedwater pump turbine (1) is connected to the inlet of the steam compressor (3), and the outlet of the steam compressor (3) is divided into two paths, one of which is connected to the inlet of the heat user and the other is connected to the inlet of the main steam turbine (2).

2. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 1, characterized in that: The outlet of the feedwater pump steam turbine (1) is connected to the inlet of the steam compressor (3) through the feedwater pump steam turbine to the steam compressor exhaust valve (6).

3. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 1, characterized in that: It also comprises an electric motor (4), and the driving shaft of the steam compressor (3) is connected to the electric motor (4).

4. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 3, characterized in that: The steam compressor (3) is coaxially connected to the electric motor (4).

5. The exhaust steam heating system of a feedwater pump steam turbine coupled with a steam compressor according to claim 1, characterized in that: The outlet of the steam compressor (3) is connected to the heat user and the main steam turbine (2) via a steam compressor outlet control valve (7).

6. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 5, characterized in that: The steam compressor outlet control valve (7) is connected to the heat user and the main steam turbine (2) via the steam compressor outlet check valve (8).

7. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 1, characterized in that: It also comprises a condenser, and the outlet of the feedwater pump turbine (1) is connected to the inlet of the condenser.

8. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 7, characterized in that: The outlet of the feedwater pump steam turbine (1) is connected to the inlet of the condenser through the feedwater pump steam turbine to the condenser exhaust valve (5).

9. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 1, characterized in that: It also includes a condenser, wherein the outlet of the feedwater pump steam turbine (1) is connected to the inlet of the condenser via a feedwater pump steam turbine to condenser exhaust valve (5), and the outlet of the feedwater pump steam turbine (1) is connected to the inlet of the steam compressor (3) via a feedwater pump steam turbine to steam compressor exhaust valve (6); The outlet of the steam compressor (3) is connected to the heat user and the main steam turbine (2) via a steam compressor outlet control valve (7) and a steam compressor outlet check valve (8).

10. The feedwater pump steam turbine exhaust steam heating system coupled with a steam compressor according to claim 9, characterized in that: It also includes a controller, which is connected to the control end of the feedwater pump turbine to the condenser exhaust valve (5), the control end of the feedwater pump turbine to the steam compressor exhaust valve (6), and the control end of the steam compressor outlet control valve (7).

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