CN210738630U - Exhaust steam treatment system of steam turbine of thermal power plant - Google Patents
Exhaust steam treatment system of steam turbine of thermal power plant Download PDFInfo
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- CN210738630U CN210738630U CN201921680024.0U CN201921680024U CN210738630U CN 210738630 U CN210738630 U CN 210738630U CN 201921680024 U CN201921680024 U CN 201921680024U CN 210738630 U CN210738630 U CN 210738630U
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- steam
- air cooling
- exhaust
- power plant
- condenser
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Abstract
The utility model provides a steam exhaust processing system of steam turbine of steam power plant belongs to the equipment field of steam power plant to steam turbine exhaust's steam exhaust can cause the steam turbine to lead to the problem of unit tripping operation because of the backpressure risees suddenly when solving heating system and getting rid of the lotus suddenly. The steam inlet of exhaust pipe way is connected with the low pressure cylinder of steam turbine, the steam outlet of exhaust pipe way is connected with the steam inlet of high back pressure condenser, the circulating water export of high back pressure condenser is connected with heating system's circulating water inlet, heating system's circulating water export and high back pressure condenser's circulating water inlet connection, first motorised valve and pressure sensor set up on exhaust pipe way, the one end and the exhaust pipe way of air cooling pipeline are connected, the other end and the steam inlet of air cooling condenser of air cooling pipeline are connected, the second motorised valve sets up on the air cooling pipeline, pressure sensor, first motorised valve and second motorised valve all are connected with the DCS control system of steam power plant.
Description
Technical Field
The utility model relates to a thermal power plant equipment technical field especially relates to a steam exhaust processing system of steam turbine of thermal power plant.
Background
In an air cooling unit for cogeneration, in order to improve the heat supply efficiency of the unit and reduce the coal burning cost, exhaust steam discharged from a low pressure cylinder of a steam turbine is used for heat supply of a heat supply system. However, in the actual operation process, if the heating system is suddenly interrupted or fails, that is, the heating system suddenly loses load, the steam turbine can be tripped due to sudden increase of back pressure, so that the normal operation of production is affected, and certain economic loss is caused to the thermal power plant. In order to avoid the situation, the utility model provides a steam exhaust treatment system of a steam turbine of a thermal power plant.
Disclosure of Invention
For solving the technical problem that steam exhaust of steam turbine low pressure jar can make the unit trip when heating system breaks down suddenly or breaks down, the utility model provides a steam exhaust processing system of steam turbine of steam power plant.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides a steam exhaust processing system of steam turbine of steam power plant, its includes exhaust steam pipe way, first motorised valve, high back pressure condenser, pressure sensor, air cooling condenser, at least one second motorised valve and at least one air cooling pipeline, wherein: the steam inlet of exhaust steam pipe way is connected with the low pressure cylinder of steam turbine, the steam outlet of exhaust steam pipe way is connected with the steam inlet of high back pressure condenser, the circulating water export of high back pressure condenser and heating system's circulating water inlet connection, heating system's circulating water export and high back pressure condenser's circulating water inlet connection, first motorised valve and pressure sensor set up on exhaust steam pipe way, the one end and the exhaust steam pipe way of air cooling pipeline are connected, the other end and the steam inlet of air cooling condenser of air cooling pipeline are connected, the second motorised valve sets up on the air cooling pipeline, pressure sensor, first motorised valve and second motorised valve all are connected with the DCS control system of steam power plant.
Optionally, the exhaust steam treatment system of the steam turbine of the thermal power plant comprises three second electrically operated valves and three air cooling pipelines, the three air cooling pipelines are arranged in parallel, and the three second electrically operated valves are respectively arranged on the three air cooling pipelines.
The utility model has the advantages that:
through set up pressure sensor and first motorised valve on the exhaust steam pipe way, set up the second motorised valve on the air cooling pipeline, and set up air cooling condenser and air cooling pipe connection, make when pressure sensor detects that pressure on the exhaust steam pipe way risees suddenly to when surpassing the predetermined threshold value, can open by DCS control system control second motorised valve and discharge exhaust steam, and carry out recycle by the waste heat of air cooling condenser in the exhaust steam, thereby solved heating system abrupt interruption or the problem that breaks down and lead to the unit tripping operation, ensure that the unit can normal operating, not only can guarantee going on smoothly of thermal power plant production, and reduced the power plant and caused economic loss because of the unit tripping operation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the exhaust steam treatment system of a steam turbine of a thermal power plant in the present embodiment includes a steam exhaust pipeline 1, a first electric valve 2, a high back pressure condenser 3, a pressure sensor 4, an air cooling condenser 5, at least one second electric valve 6, and at least one air cooling pipeline 7, wherein: the steam inlet of exhaust pipe 1 is connected with the low pressure cylinder 8 of steam turbine, the steam outlet of exhaust pipe 1 is connected with the steam inlet of high back pressure condenser 3, the circulating water export of high back pressure condenser 3 and heating system 9's circulating water access connection, heating system 9's circulating water export and high back pressure condenser 3's circulating water access connection, first motorised valve 2 and pressure sensor 4 set up on exhaust pipe 1, the one end and the exhaust pipe 1 of air cooling pipeline 7 are connected, the other end and the steam inlet of air cooling condenser 5 of air cooling pipeline 7 are connected, second motorised valve 6 sets up on air cooling pipeline 7, pressure sensor 4, first motorised valve 2 and second motorised valve 6 all are connected with the DCS control system of thermal power plant.
Optionally, the exhaust steam treatment system of the steam turbine of the thermal power plant comprises three second electric valves 6 and three air cooling pipelines 7, the three air cooling pipelines 7 are arranged in parallel, and the three second electric valves 6 are respectively arranged on the three air cooling pipelines 7.
The utility model discloses when using, first motorised valve 2 is in the state of opening, and under the normal heat supply state, at least one second motorised valve 6 is in the closed condition, and 8 exhaust steam of low pressure cylinder of steam turbine passes through exhaust pipe 1 and gets into high back pressure condenser 3, and the circulating water that provides the heating by high back pressure condenser 3 for heating system 9 carries out the heat supply, and pressure sensor 4 gathers the exhaust pressure on the exhaust pipe 1 in real time. When the heating system 9 fails or is suddenly interrupted, it inevitably results in a sudden increase in the steam pressure in the exhaust steam line 1. When the pressure acquired by the pressure sensor 4 is greater than a preset threshold value (such as 35kpa), the DCS control system determines that the heat supply system 9 fails or is suddenly interrupted, and at this time, the DCS control system controls at least one second electric valve 6 to be fully opened to prevent the steam turbine from stopping suddenly, so that the exhaust steam discharged by the steam turbine low-pressure cylinder 8 enters the air-cooled condenser 5 to recycle the waste heat in the exhaust steam and then returns the waste heat to the boiler.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (2)
1. The utility model provides a steam exhaust processing system of steam turbine of steam power plant, its characterized in that, includes exhaust steam pipe way (1), first motorised valve (2), high back pressure condenser (3), pressure sensor (4), air cooling condenser (5), at least one second motorised valve (6) and at least one air cooling pipeline (7), wherein:
the steam inlet of the steam exhaust pipeline (1) is connected with the low-pressure cylinder (8) of the steam turbine, the steam outlet of the steam exhaust pipeline (1) is connected with the steam inlet of the high-backpressure condenser (3), the circulating water outlet of the high-backpressure condenser (3) is connected with the circulating water inlet of the heat supply system (9), the circulating water outlet of the heat supply system (9) is connected with the circulating water inlet of the high-backpressure condenser (3), the first electric valve (2) and the pressure sensor (4) are arranged on the steam exhaust pipeline (1), one end of the air cooling pipeline (7) is connected with the steam exhaust pipeline (1), the other end of the air cooling pipeline (7) is connected with the steam inlet of the air cooling condenser (5), the second electric valve (6) is arranged on the air cooling pipeline (7), and the pressure sensor (4), the first electric valve (2) and the second electric valve (6) are both connected with a DCS control system of the thermal power plant.
2. The exhaust steam treatment system of the steam turbine of the thermal power plant according to claim 1, characterized in that the exhaust steam treatment system of the steam turbine of the thermal power plant comprises three second electric valves (6) and three air cooling pipelines (7), the three air cooling pipelines (7) are arranged in parallel, and the three second electric valves (6) are respectively arranged on the three air cooling pipelines (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921680024.0U CN210738630U (en) | 2019-10-09 | 2019-10-09 | Exhaust steam treatment system of steam turbine of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921680024.0U CN210738630U (en) | 2019-10-09 | 2019-10-09 | Exhaust steam treatment system of steam turbine of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210738630U true CN210738630U (en) | 2020-06-12 |
Family
ID=71009055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921680024.0U Expired - Fee Related CN210738630U (en) | 2019-10-09 | 2019-10-09 | Exhaust steam treatment system of steam turbine of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210738630U (en) |
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2019
- 2019-10-09 CN CN201921680024.0U patent/CN210738630U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200612 Termination date: 20201009 |