Steam bypass structure of steam turbine

Abstract

The utility model relates to a steam bypass structure of a steam turbine. The other end of a steam main pipeline of the steam turbine is connected to one end of an electric stop valve; the other end of the electric stop valve is connected with one end of a bypass temperature and pressure reducer; the other end of the electric stop valve is connected with one end of an electric adjusting valve; the other end of the electric stop valve is simultaneously connected with one end of a desuperheating water regulating valve; the other end of the electric stop valve is also connected with a condenser; after the bypass temperature and pressure reducer is subjected to temperature reduction, condensate water entering the condenser is adjusted through an electric adjusting valve and a temperature reduction water adjusting valve; high-temperature and high-pressure steam generated by a boiler enters the condenser to be continuously condensed after being subjected to temperature and pressure reduction through the equipment, and then condensed water is supplemented to a boiler water supply system, so that the problems that in the prior art, when pressure-reduced water is discharged from a steam main pipeline of a steam turbine, the pressure-reduced water is generally directly discharged through pressure reduction and temperature reduction, and water resources are wasted are solved. And energy loss is caused.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to a steam bypass structure, in particular to a steam turbine steam bypass structure. BACKGROUND

[0002] In the prior art, when the decompression water is discharged on the steam turbine steam main pipeline, it is generally directly discharged through decompression and cooling, which causes waste of water resources and energy loss. UTILITY MODEL CONTENT

[0003] The embodiment of the utility model aims at providing a steam turbine steam bypass structure which can realize water resource recycling, and can realize water resource recycling.

[0004] In order to achieve the above-mentioned purpose, the embodiment of the utility model designs a steam turbine steam bypass structure, which comprises:

[0005] A steam turbine steam main pipeline;

[0006] An electric stop valve, one end of the electric stop valve is connected to the other end of the steam turbine steam main pipeline;

[0007] A bypass desuperheater, one end of the bypass desuperheater is connected to the other end of the electric stop valve;

[0008] An electric regulating valve, one end of the electric regulating valve is connected to the other end of the electric stop valve;

[0009] A desuperheating water regulating valve, one end of the desuperheating water regulating valve is connected to the other end of the electric stop valve;

[0010] A condenser, the other end of the electric stop valve is also connected to the condenser; the condensate entering the condenser is adjusted by the electric regulating valve and the desuperheating water regulating valve after the desuperheating of the bypass desuperheater.

[0011] Further, in the steam turbine steam bypass structure described in the embodiment, the electric stop valve is a high-pressure electric gate valve.

[0012] Further, in the steam turbine steam bypass structure described in the embodiment, a bypass control valve is arranged on the bypass desuperheater; the bypass control valve is connected to a thermocouple for temperature measurement.

[0013] Further, in the steam turbine steam bypass structure described in the embodiment, a plurality of bypass maintenance valves are arranged on the outlet of the bypass desuperheater, and the bypass desuperheater is depressurized when the bypass desuperheater fails.

[0014] Further, in the steam turbine steam bypass structure described in the embodiment, a servo motor is arranged on the electric regulating valve; the steam flow entering the condenser is controlled through the servo motor.

[0015] Further, in the steam turbine steam bypass structure described in the embodiment, the other end of the desuperheating water regulating valve is discharged to an unmanned drainage ditch, reducing the desuperheating water in the pipeline and ensuring the steam flow in the steam pipeline.

[0016] Further, in the steam turbine steam bypass structure described in the embodiment, a sampling water stop valve is connected to the other end of the electric stop valve at the lower end of the desuperheating water regulating valve, and a sampling pipe is connected to the other end of the sampling water stop valve.

[0017] Further, in the steam turbine steam bypass structure described in the embodiment, the outlet of the condenser is connected to a boiler feedwater system.

[0018] Compared with the prior art, in the embodiment of the utility model, the other end of the steam turbine steam main pipeline is connected to one end of the electric stop valve; one end of the bypass desuperheating pressure reducer is connected to the other end of the electric stop valve; one end of the electric regulating valve is connected to the other end of the electric stop valve; one end of the desuperheating water regulating valve is connected to the other end of the electric stop valve; and the condenser is also connected to the other end of the electric stop valve; after the desuperheating of the bypass desuperheating pressure reducer, the condensate water entering the condenser is regulated through the electric regulating valve and the desuperheating water regulating valve; the high-temperature and high-pressure steam generated by the boiler is realized to enter the condenser for further condensation after the desuperheating and pressure reduction through the device, and the condensed water is supplied to the boiler feedwater system, so that the steam turbine steam bypass structure for realizing the recycling of water resources is realized, and the problem that the pressure-reduced water is directly discharged through pressure reduction and temperature reduction when the pressure-reduced water is discharged from the steam turbine steam main pipeline in the prior art is solved, so that the waste of water resources and the energy loss are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear, the embodiments of the utility model will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the utility model, many technical details are proposed in order to make the readers better understand the present application. However, even if there is no such technical detail and various changes and modifications based on the following embodiments, the technical scheme claimed in each claim of the present application can be realized.

[0021] The embodiment of the utility model relates to a steam turbine steam bypass structure, such as Figure 1 The steam turbine steam main pipeline 1 in the embodiment is mainly used for steam turbine steam delivery.

[0022] The other end of the steam turbine steam main pipeline 1 is connected to the one end of the electric stop valve 2; the electric stop valve 2 is used for on-off of the steam in the steam turbine steam main pipeline 1.

[0023] The other end of the electric stop valve 2 is connected to the one end of the bypass desuperheater 3; the bypass desuperheater 3 is mainly used for the function of desuperheating and decompressing the steam in the steam turbine steam main pipeline 1.

[0024] The other end of the electric stop valve 2 is connected to the one end of the electric regulating valve 4; the electric regulating valve 4 is used for regulating the flow of the steam in the steam turbine steam main pipeline 1.

[0025] The other end of the electric stop valve 2 is connected to the one end of the desuperheating water regulating valve 5; the desuperheating water regulating valve 5 is used for regulating the flow of the desuperheating water in the steam turbine steam main pipeline 1.

[0026] The other end of the electric stop valve 2 is also connected to the condenser 6; the condensate water entering the condenser 6 is regulated through the electric regulating valve 4 and the desuperheating water regulating valve 5 after the desuperheating of the bypass desuperheater 3; the condenser 6 is mainly used for the function of changing the steam in the steam turbine steam main pipeline 1 into desuperheating water. The steam turbine steam bypass structure in the embodiment realizes that the high-temperature and high-pressure steam generated by the boiler enters the condenser for further condensation after the desuperheating and decompression through the equipment, and then the condensed water is supplemented to the boiler feedwater system, so that the steam turbine steam bypass structure capable of realizing the water resource recycling is achieved, and the waste of water resources and the energy loss caused by the direct discharge of the decompressed and cooled water on the steam turbine steam main pipeline in the prior art are solved.

[0027] In order to realize the above technical effects, the steam turbine steam bypass structure in the embodiment, as shown in the figure, Figure 1 The electric stop valve 2 is a high-pressure electric gate valve. In this way, the steam turbine steam bypass structure in the embodiment is beneficial to remote control opening and closing.

[0028] In order to realize the above technical effects, the steam turbine steam bypass structure in the embodiment, as shown in the figure, Figure 1 A bypass control valve 31 is arranged on the bypass desuperheater 3; the bypass control valve 31 is connected to a thermocouple 32 for temperature measurement.

[0029] In order to realize the above technical effects, the steam turbine steam bypass structure in the embodiment, as shown in the figure, Figure 1As shown, a plurality of bypass maintenance valves 33 are arranged at the outlet of the bypass desuperheater 3, and the bypass desuperheater 3 is depressurized when the bypass desuperheater 3 fails.

[0030] In order to achieve the above technical effects, the steam bypass structure of the turbine in the embodiment is as follows: Figure 1 As shown, a servo motor 41 is arranged at the electric regulating valve 4, and the steam flow entering the condenser 6 is controlled by the servo motor 41.

[0031] In order to achieve the above technical effects, the steam bypass structure of the turbine in the embodiment is as follows: Figure 1 As shown, the other end of the desuperheating water regulating valve 5 is discharged to an unmanned drainage ditch, and the desuperheating water in the pipeline is reduced to ensure the steam flow in the steam pipeline.

[0032] In order to achieve the above technical effects, the steam bypass structure of the turbine in the embodiment is as follows: Figure 1 As shown, at the lower end of the desuperheating water regulating valve 5, one end of the sampling water stop valve 7 is connected to the other end of the electric stop valve 2, and the other end of the sampling water stop valve 7 is connected to the sampling pipe 8. It is convenient to sample and analyze the desuperheating water.

[0033] In order to achieve the above technical effects, the steam bypass structure of the turbine in the embodiment is as follows: Figure 1 As shown, the outlet of the condenser 6 is connected to the boiler feed water system. Thus, the steam bypass structure of the turbine in the embodiment returns the desuperheating water of the condenser 6 to the boiler feed water system.

[0034] Those skilled in the art can understand that the above embodiments are specific embodiments for realizing the utility model, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the utility model.

Claims

1. A steam turbine steam bypass arrangement, characterized by, The utility model relates to a steam turbine bypass control system, comprising: a steam turbine main pipe; an electric stop valve, one end of which is connected to the other end of the steam turbine main pipe; a bypass desuperheater, one end of which is connected to the other end of the electric stop valve; an electric regulating valve, one end of which is connected to the other end of the electric stop valve; a desuperheating water regulating valve, one end of which is connected to the other end of the electric stop valve; a condenser, the other end of which is also connected to the other end of the electric stop valve; the condensate entering the condenser is regulated by the electric regulating valve and the desuperheating water regulating valve after being desuperheated by the bypass desuperheater.

2. The steam turbine steam bypass arrangement of claim 1, wherein, The electric stop valve is a high-voltage electric gate valve.

3. The steam turbine steam bypass arrangement of claim 1, wherein, A bypass control valve is arranged on the bypass desuperheater; the bypass control valve is connected to a thermocouple for temperature measurement.

4. The steam turbine steam bypass arrangement of claim 3, wherein, A plurality of bypass maintenance valves are arranged on the outlet of the bypass desuperheater to relieve pressure of the bypass desuperheater when it fails.

5. The steam turbine steam bypass arrangement of claim 1, wherein, A servo motor is arranged on the electric regulating valve; the steam flow entering the condenser is controlled by the servo motor.

6. The steam turbine steam bypass arrangement of claim 1, wherein, The other end of the desuperheating water regulating valve is discharged to an unmanned drainage ditch to reduce the desuperheating water in the pipeline and ensure the steam flow in the steam pipeline.

7. The steam turbine steam bypass arrangement of claim 1, wherein, A sampling water stop valve is connected to the other end of the electric stop valve at the lower end of the desuperheating water regulating valve, and a sampling pipe is connected to the other end of the sampling water stop valve.

8. The steam turbine steam bypass arrangement of claim 7, wherein, The outlet of the condenser is connected to a boiler feedwater system.

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