CN221442668U

CN221442668U - Steam cooling device of high-pressure heater of steam turbine generator unit

Info

Publication number: CN221442668U
Application number: CN202420129232.6U
Authority: CN
Inventors: 王强; 代拥军; 刘国超; 李军强
Original assignee: Xinjiang Oriental Hope Nonferrous Pioneer Metals Corp
Current assignee: Xinjiang Oriental Hope Nonferrous Pioneer Metals Corp
Priority date: 2024-01-18
Filing date: 2024-01-18
Publication date: 2024-07-30
Anticipated expiration: 2034-01-18

Abstract

The utility model relates to the technical field of steam turbines, and discloses a steam cooling device of a high-pressure heater of a steam turbine generator unit, which comprises a steam pipe, a connecting pipe communicated with the inner wall of the steam pipe and used for conveying cold water, a water supply regulating valve communicated with one end of the connecting pipe and used for regulating water outlet flow, a flow guide pipe communicated with the inner wall of the water supply regulating valve, a temperature reducing water pipe communicated with one end of the flow guide pipe and used for providing cold water, a bypass pipe communicated with the inner wall of the steam pipe and used for splitting steam, an upper branch pipe and a lower branch pipe communicated with the inner wall of the bypass pipe, and an atomization injection part fixed on the inner wall of the steam pipe, wherein the atomization injection part comprises a gas pipe, so that the problems that in the prior art, the three-stage extraction temperature of a 350MW steam turbine generator unit is higher than a design value, the 11 th-13-stage partition plate and the top steam seal reconstruction of a pressure cylinder in the steam turbine generator unit cannot solve the problem of high extraction temperature, and the problem of high cost caused by redesign of the steam turbine are solved.

Description

Steam cooling device of high-pressure heater of steam turbine generator unit

Technical Field

The utility model relates to the technical field of steam turbines, in particular to a steam cooling device of a high-pressure heater of a steam turbine generator unit.

Background

The steam turbine is also called a steam turbine engine, is a rotary steam power device, high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with a blade row rotates and simultaneously does work outwards, and the steam turbine is main equipment of a modern thermal power plant and is also used in metallurgical industry, chemical industry and ship power devices.

In the prior art, the three-section steam extraction temperature of a 350MW steam turbine generator unit is higher than a design value, the 11 th-13 th-stage partition plate and the blade top steam seal of a pressure cylinder in the steam turbine generator unit are transformed, the problem of high steam extraction temperature can not be solved, and the production cost of redesigning the steam turbine is high.

Disclosure of utility model

The utility model aims to provide a steam cooling device of a high-pressure heater of a steam turbine generator unit, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a turbo generator set high pressure heater steam heat sink, includes the steam pipe, still including communicate in the steam pipe inner wall is used for carrying the connecting pipe of cold water, communicate in connecting pipe one end is used for adjusting the water supply regulating valve of play water flow, communicate in the honeycomb duct of water supply regulating valve inner wall, communicate in honeycomb duct one end is used for providing the cold water reduce temperature water pipe, communicate in the steam pipe inner wall is used for the bypass pipe of steam reposition of redundant personnel, communicate in the last bleeder and the lower bleeder of bypass pipe inner wall are fixed in the atomizing injection piece of steam pipe inner wall.

Preferably, the atomizing spray piece comprises a gas pipe, and the two ends of the gas pipe are respectively provided with a gas inlet and a gas outlet.

Preferably, an atomization ejector is arranged on the inner wall of the air inlet, and a vent hole is formed in one end of the atomization ejector.

Preferably, a connecting rod is fixedly connected to the bottom of the atomizing sprayer, and the connecting rod is fixed to the inner wall of the steam pipe.

Preferably, the inner wall of the atomizing sprayer is communicated with one end of the connecting pipe, and the connecting end of the connecting pipe and the atomizing sprayer is provided with a spray hole.

Preferably, the inner wall of the connecting pipe is provided with a first stop valve and a check valve, and the inner wall of the flow guide pipe is respectively provided with a water pressure valve, a dredging valve, a throttle valve and a second stop valve.

Preferably, the inner wall of the upper branch pipe is provided with a third stop valve, and the inner wall of the lower branch pipe is provided with a fourth stop valve.

Preferably, the inner wall of the steam pipe is provided with a pneumatic valve and a thermometer.

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

According to the utility model, the connecting pipe, the water supply regulating valve, the flow guide pipe, the temperature reducing water pipe and the atomization spraying piece are arranged, so that the temperature of steam in the steam pipe can be reduced, the working efficiency and the production safety are improved, and the problems that in the prior art, the three-section steam extraction temperature of a 350MW steam turbine generator unit is higher than a design value, the problem of high steam extraction temperature cannot be solved due to the improvement of 11-13-stage partition plates and blade top steam seals of a pressure cylinder in the steam turbine generator unit, and the cost is high due to the redesign of a steam turbine are solved.

Drawings

FIG. 1 is a schematic diagram of a steam cooling device for a high-pressure heater of a turbo generator set according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the inside of a steam pipe according to the present utility model;

FIG. 3 is a schematic view of the structure of the inside of a gas pipe according to the present utility model;

Fig. 4 is a schematic view of the structure of the inside of the atomizing injector according to the present utility model.

In the figure: 1. a steam pipe; 2. a connecting pipe; 3. a water supply regulating valve; 4. a flow guiding pipe; 5. a temperature reducing water pipe; 6. a bypass tube; 7. an upper branch pipe; 8. a lower branch pipe; 9. an atomizing spray member; 91. a gas pipe; 92. an air inlet; 93. an air outlet; 94. an atomizing injector; 95. a vent hole; 96. a connecting rod; 97. a spray hole; 10. a first stop valve; 11. a check valve; 12. a water pressure valve; 13. a dredging valve; 14. a throttle valve; 15. a second shut-off valve; 16. a third stop valve; 17. a fourth shut-off valve; 18. an air pressure valve; 19. a thermometer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the steam cooling device of the high-pressure heater of the turbo generator set comprises a steam pipe 1, a connecting pipe 2 communicated with the inner wall of the steam pipe 1 and used for conveying cold water, a water supply regulating valve 3 communicated with one end of the connecting pipe 2 and used for regulating the water flow, a flow guide pipe 4 communicated with the inner wall of the water supply regulating valve 3, a temperature reducing pipe 5 communicated with one end of the flow guide pipe 4 and used for providing cold water, a bypass pipe 6 communicated with the inner wall of the steam pipe 1 and used for splitting steam, an upper branch pipe 7 and a lower branch pipe 8 communicated with the inner wall of the bypass pipe 6, and an atomization injection piece 9 fixed on the inner wall of the steam pipe 1; through setting up steam pipe 1 and can carry high temperature steam, through setting up connecting pipe 2 and 4 joinable atomizing sprayer 94 of honeycomb duct and subtracting warm water pipe 5, carry cooling cold water to steam pipe 1 in, through setting up the play water flow of giving water adjustable cold water of water regulator valve 3, can provide cooling with cold water through setting up subtracting warm water pipe 5, can make steam pipe 1 reposition of redundant personnel to upper branch pipe 7 and lower branch pipe 8 through setting up bypass pipe 6, can shunt steam through setting up upper branch pipe 7 and lower branch pipe 8, can cool down the processing to steam pipe 1's high temperature steam through setting up atomizing injection member 9.

Referring to fig. 2, 3 and fig. 3, the atomizing spray member 9 includes a gas pipe 91, and two ends of the gas pipe 91 are respectively provided with a gas inlet 92 and a gas outlet 93; an atomization ejector 94 is arranged on the inner wall of the air inlet 92, and a vent hole 95 is formed in one end of the atomization ejector 94; the bottom of the atomizing injector 94 is fixedly connected with a connecting rod 96, and the connecting rod 96 is fixed on the inner wall of the steam pipe 1; the inner wall of the atomizing sprayer 94 is communicated with one end of a connecting pipe 2, and a spray hole 97 is formed in the connecting end of the connecting pipe 2 and the atomizing sprayer 94; can carry out drainage to steam in steam pipe 1 through setting up gas-supply pipe 91, air inlet 92 and gas outlet 93, can carry out atomizing injection cooling to steam through setting up atomizing sprayer 94, circulate steam through setting up air vent 95, can be fixed atomizing sprayer 94 and steam pipe 1 inner wall through setting up connecting rod 96, can spray cooling water to atomizing sprayer 94 through setting up orifice 97.

Referring to fig. 1, a first stop valve 10 and a check valve 11 are provided on the inner wall of a connecting pipe 2, and a water pressure valve 12, a dredging valve 13, a throttle valve 14 and a second stop valve 15 are provided on the inner wall of a guide pipe 4; the inner wall of the upper branch pipe 7 is provided with a third stop valve 16, and the inner wall of the lower branch pipe 8 is provided with a fourth stop valve 17; the inner wall of the steam pipe 1 is provided with an air pressure valve 18 and a thermometer 19; the on-off of the cooling water can be controlled by arranging the first stop valve 10 and the second stop valve 15, the backflow of the cooling water of the medium can be prevented by arranging the check valve 11, the water pressure of the cooling water can be detected by arranging the water pressure valve 12, the dredging can be carried out when the flow guiding pipe 4 is blocked by arranging the dredging valve 13, the throttling and the depressurization can be carried out by arranging the throttling valve 14, the cooling water flow can be regulated, the on-off of the steam in the upper branch pipe 7 can be controlled by arranging the third stop valve 16, the on-off of the steam in the lower branch pipe 8 can be controlled by arranging the fourth stop valve 17, the steam pressure in the steam pipe 1 can be detected by arranging the air pressure valve 18, and the steam temperature in the steam pipe 1 can be detected by arranging the thermometer 19.

Working principle: when the thermometer 19 detects that the temperature of steam in the steam pipe 1 is overlarge, a signal is transmitted to a receiver to control and open the first stop valve 10 and the second stop valve 15, so that cold water in the temperature reduction pipe 5 enters the atomizing injector 94 through the guide pipe 4 and the connecting pipe 2, is sprayed out through the spray hole 97, is atomized and fused with the steam through the vent hole 95, so that the steam is cooled, and the cooled steam flows out through the air outlet 93.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a turbo generator set high pressure heater steam heat sink, includes steam pipe (1), its characterized in that still including communicate in steam pipe (1) inner wall is used for carrying connecting pipe (2) of cold water, communicate in connecting pipe (2) one end is used for adjusting water supply regulating valve (3) of play water flow, communicate in honeycomb duct (4) of water supply regulating valve (3) inner wall, communicate in honeycomb duct (4) one end is used for providing cold water subtract warm water pipe (5), communicate in steam pipe (1) inner wall is used for bypass pipe (6) of steam reposition of redundant personnel, communicate in upper branch pipe (7) and lower branch pipe (8) of bypass pipe (6) inner wall, be fixed in atomizing injection member (9) of steam pipe (1) inner wall.

2. The steam turbine generator unit high pressure heater steam cooling device of claim 1, wherein: the atomizing spray piece (9) comprises a gas pipe (91), and two ends of the gas pipe (91) are respectively provided with a gas inlet (92) and a gas outlet (93).

3. The steam turbine generator unit high pressure heater steam cooling device of claim 2, wherein: an atomization ejector (94) is arranged on the inner wall of the air inlet (92), and a vent hole (95) is formed in one end of the atomization ejector (94).

4. A turbo-generator set high pressure heater steam heat sink according to claim 3, wherein: the bottom of the atomizing sprayer (94) is fixedly connected with a connecting rod (96), and the connecting rod (96) is fixed on the inner wall of the steam pipe (1).

5. The steam turbine generator unit high pressure heater steam cooling device of claim 4, wherein: the inner wall of the atomizing sprayer (94) is communicated with one end of the connecting pipe (2), and a spray hole (97) is formed in the connecting end of the connecting pipe (2) and the atomizing sprayer (94).

6. The steam turbine generator unit high pressure heater steam cooling device of claim 1, wherein: the inner wall of connecting pipe (2) is provided with first stop valve (10) and check valve (11), the inner wall of honeycomb duct (4) is provided with water pressure valve (12), mediation valve (13), choke valve (14) and second stop valve (15) respectively.

7. The steam turbine generator unit high pressure heater steam cooling device of claim 1, wherein: the inner wall of the upper branch pipe (7) is provided with a third stop valve (16), and the inner wall of the lower branch pipe (8) is provided with a fourth stop valve (17).

8. The steam turbine generator unit high pressure heater steam cooling device of claim 1, wherein: the inner wall of the steam pipe (1) is provided with an air pressure valve (18) and a thermometer (19).