CN211782849U - Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set - Google Patents
Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set Download PDFInfo
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- CN211782849U CN211782849U CN201922340068.5U CN201922340068U CN211782849U CN 211782849 U CN211782849 U CN 211782849U CN 201922340068 U CN201922340068 U CN 201922340068U CN 211782849 U CN211782849 U CN 211782849U
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Abstract
A air cooling island freeze-proof device for going up cylinder transformation on direct air-cooled generating set to solve the current mode that adopts through newly-increased tubular condenser and supporting circulating water pump that prevents air cooling island frost crack, increase the station service power rate, and the system is more complicated, and area is big, keeps apart the problem that air cooling island operation used unit operation flexibility reduces. The utility model comprises a temperature-reducing valve group, a temperature-reducing water pipe, a temperature-reducing pressure reducer, an air cooling island steam main pipe, an anti-freezing steam main pipe, an air cooling island and a plurality of air cooling island steam branch pipes; the air cooling island is provided with a plurality of air cooling island steam branch pipes, the air cooling island steam branch pipes are respectively communicated with an air cooling island steam main pipe, the air cooling island steam main pipe is communicated with an anti-freezing steam main pipe, the anti-freezing steam main pipe is provided with a temperature and pressure reducer, a water inlet of the temperature and pressure reducer is communicated with a temperature reduction water pipe, and the temperature reduction water pipe is provided with a temperature reduction valve group. The utility model discloses steam turbine low pressure jar excision operation when can realizing direct air-cooled generating set peak regulation to influence to entire system is less.
Description
Technical Field
The utility model relates to an freeze-proof device, concretely relates to freeze-proof device that is used for direct air-cooled generating set to cut after jar transformation.
Background
When an air-cooled generator set is in peak load regulation, a low-pressure cylinder needs to be cut off, at the moment, steam enters an air cooling island and is only cooled by the low-pressure cylinder of a steam turbine, the steam flow is small, and when cold weather is encountered in the north, the phenomenon of frost cracking of the air cooling island can occur due to insufficient steam flow. The existing method increases the plant power consumption rate, the system is complex, the occupied area is large, and the flexibility of unit operation is reduced when the isolated air cooling island is operated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, and provide an air cooling island freeze-proof device that is used for direct air cooling formula generating set to cut after the jar is reformed transform.
The utility model discloses a solve the technical scheme that above-mentioned technical problem took and be:
the air cooling island anti-freezing device used after cylinder cutting reconstruction of the direct air cooling type generator set comprises a temperature reduction valve bank, a temperature reduction water pipe, a temperature reduction pressure reducer, an air cooling island steam main pipe, an anti-freezing steam main pipe, an air cooling island and a plurality of air cooling island steam branch pipes;
the air cooling island is provided with a plurality of air cooling island steam branch pipes, the air cooling island steam branch pipes are respectively communicated with an air cooling island steam main pipe, the air cooling island steam main pipe is communicated with an anti-freezing steam main pipe, the anti-freezing steam main pipe is provided with a temperature and pressure reducer, a water inlet of the temperature and pressure reducer is communicated with a temperature reduction water pipe, and the temperature reduction water pipe is provided with a temperature reduction valve group.
Compared with the prior art, the utility model following beneficial effect has:
one, the utility model discloses set up the temperature reduction valves, temperature reduction pressure reducer and the steam of preventing frostbite and be responsible for, high-pressure steam through preventing frostbite in the steam main pipe produces low temperature low pressure steam and gets into the air cooling island through temperature reduction pressure reducer and temperature reduction valves to steam is not enough and causes the problem that the air cooling island frost cracks when compensatying the steam turbine and cutting off the low pressure jar.
Two, the utility model discloses can realize that direct air-cooled turbine unit cuts the jar and reforms transform the back, under the prerequisite of air cooling island safe operation, low pressure jar zero power. In the peak regulation operation period, the air cooling units on the air cooling island independently operate after the low-pressure cylinder is cut off, and the anti-freezing device is put into operation; and in the normal operation period, the steam exhaust load is continuously increased, the multiple rows of air cooling units are started, and the anti-freezing device is closed. The mode ensures that the low-pressure cylinder can be stopped or normally operated at any time, and has small influence on the system.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
Example 1: the embodiment is described with reference to fig. 1, and the air cooling island anti-freezing device for direct air cooling type generator set cylinder cutting reconstruction in the embodiment includes a temperature reduction valve group 12, a temperature reduction water pipe 5, a temperature reduction pressure reducer 7, an air cooling island steam main pipe 3, an anti-freezing steam main pipe 4, an air cooling island 1 and a plurality of air cooling island steam branch pipes 13;
be equipped with many air cooling island steam branch pipes 13 on the air cooling island 1, many air cooling island steam branch pipes 13 are responsible for 3 intercommunications with air cooling island steam respectively, and air cooling island steam is responsible for 3 and is responsible for 4 intercommunications with the steam of preventing frostbite, and the steam of preventing frostbite is responsible for and is equipped with temperature reduction pressure reducer 7 on 4, and the water inlet and the temperature reduction water pipe 5 intercommunication of temperature reduction pressure reducer 7 are equipped with the temperature reduction valves 12 on the temperature reduction water pipe 5.
The air cooling island 1 is in the prior art, and the air cooling island 1 comprises a plurality of air cooling units, and each air cooling unit is communicated with the air cooling island steam main pipe 3 through an air cooling island steam branch pipe 13, so that steam is provided for each air cooling unit.
The temperature-reducing valve group 12 is made by Harbin New Lid power plant, Inc. in the prior art.
The temperature and pressure reducer 7 is made by Jiangsu thermal power equipment manufacturing limited company.
Further, a main cut-off valve 6 is arranged on the anti-freezing steam main pipe 4 between the temperature and pressure reducer 7 and the air cooling island steam main pipe 3. The purpose of setting up main stop valve 6 lies in that air-cooled generating set conveniently controls the volume of supplying air cooling island 1 steam when the switching low pressure cylinder of peak shaving, and when cutting back to the normal operating of former system steam turbine low pressure cylinder, closes main stop valve 6, and temperature reduction valves 12, temperature reduction pressure reducer 7 and air cooling island steam are responsible for 3 and are out of work this moment.
Further, a pneumatic check valve 11 is arranged on the anti-freezing steam main pipe 4 at the steam inlet side of the temperature and pressure reducer 7 to prevent the high-temperature high-pressure steam from flowing back.
Furthermore, the pneumatic check valve 11 and the anti-freezing steam main pipe 4 on the steam inlet side of the temperature and pressure reducing device 7 are provided with a regulating valve 9 and a steam flow meter 8. The adjusting valve 9 and the steam flowmeter 8 are arranged to monitor the steam flow in real time, and then the adjusting valve 9 is used for adjusting the steam flow so as to control the flow of the steam entering the air cooling island 1 and prevent the air cooling island 1 from being frozen.
Further, a steam stop valve 10 is arranged on the anti-freezing steam main pipe 4 between the pneumatic check valve 11 and the regulating valve 9 so as to conveniently control the introduction of high-temperature steam into the temperature and pressure reducing device 7.
Further, still be equipped with many branch pipes of taking out a vacuum on the air cooling island 1, every branch pipe of taking out a vacuum is equipped with vacuum stop valve 2 to ensure that every air cooling unit can the isolated operation, the quantity of air cooling unit operation is controlled as required to the more convenient.
Claims (6)
1. A air cooling island freeze-proof device for going up cylinder transformation back on direct air-cooled generating set, its characterized in that: the system comprises a temperature-reducing valve group (12), a temperature-reducing water pipe (5), a temperature-reducing pressure reducer (7), an air cooling island steam main pipe (3), an anti-freezing steam main pipe (4), an air cooling island (1) and a plurality of air cooling island steam branch pipes (13);
be equipped with many air cooling island steam branch pipes (13) on air cooling island (1), many air cooling island steam branch pipes (13) are responsible for (3) intercommunication with air cooling island steam respectively, and air cooling island steam is responsible for (3) and is responsible for (4) intercommunication with the steam that prevents frostbite, is equipped with temperature reduction pressure reducer (7) on the steam that prevents frostbite is responsible for (4), and the water inlet and the temperature reduction water pipe (5) intercommunication of temperature reduction pressure reducer (7), are equipped with temperature reduction valves (12) on temperature reduction water pipe (5).
2. The air cooling island freeze-proofing device after cylinder transformation on direct air cooling type generator set according to claim 1, characterized in that: and a main stop valve (6) is arranged on the anti-freezing steam main pipe (4) between the temperature and pressure reducer (7) and the air cooling island steam main pipe (3).
3. The air cooling island freeze-proofing device after cylinder transformation on direct air cooling type generator set according to claim 1, characterized in that: and a pneumatic check valve (11) is arranged on the anti-freezing steam main pipe (4) at the steam inlet side of the temperature and pressure reducer (7).
4. The air cooling island freeze-proofing device after cylinder transformation on direct air cooling type generator set according to claim 3, characterized in that: and the pneumatic check valve (11) and the anti-freezing steam main pipe (4) on the steam inlet side of the temperature and pressure reducer (7) are provided with a regulating valve (9) and a steam flowmeter (8).
5. The air cooling island freeze-proofing device after cylinder transformation on direct air cooling type generator set according to claim 4, characterized in that: and a steam stop valve (10) is arranged on the anti-freezing steam main pipe (4) between the pneumatic check valve (11) and the regulating valve (9).
6. The air cooling island freeze-proofing device after cylinder transformation on direct air cooling type generator set according to claim 4, characterized in that: the air cooling island (1) is also provided with a plurality of branch vacuum pipes, and each branch vacuum pipe is provided with a vacuum stop valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922340068.5U CN211782849U (en) | 2019-12-24 | 2019-12-24 | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922340068.5U CN211782849U (en) | 2019-12-24 | 2019-12-24 | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set |
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| CN211782849U true CN211782849U (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926232A (en) * | 2019-12-24 | 2020-03-27 | 哈尔滨广瀚新能动力有限公司 | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926232A (en) * | 2019-12-24 | 2020-03-27 | 哈尔滨广瀚新能动力有限公司 | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set |
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