CN110926232A - 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
- Publication number
- CN110926232A CN110926232A CN201911341713.3A CN201911341713A CN110926232A CN 110926232 A CN110926232 A CN 110926232A CN 201911341713 A CN201911341713 A CN 201911341713A CN 110926232 A CN110926232 A CN 110926232A
- Authority
- CN
- China
- Prior art keywords
- air cooling
- steam
- cooling island
- temperature
- main pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/005—Auxiliary systems, arrangements, or devices for protection against freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
Abstract
A air cooling island freeze-proof device for direct air-cooled generating set cuts after jar is reformed transform to solve the current mode that prevents that air cooling island frost crack adopts through newly-increased tubular condenser and supporting circulating water pump, 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 invention 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 invention can realize the cutting off operation of the low pressure cylinder of the steam turbine when the direct air-cooled generator set is in peak regulation, and has little influence on the whole system.
Description
Technical Field
The invention relates to an anti-freezing device, in particular to an anti-freezing device used after cylinder cutting reconstruction of a direct air-cooled generator set.
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.
Disclosure of Invention
In order to solve the problems, the invention provides an air cooling island anti-freezing device used after direct air cooling type generator set cylinder cutting transformation.
The technical scheme adopted by the invention for solving the technical problems is as follows:
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 invention has the following beneficial effects:
the invention is provided with a temperature-reducing valve group, a temperature-reducing pressure reducer and an anti-freezing steam main pipe, and high-pressure steam in the anti-freezing steam main pipe passes through the temperature-reducing pressure reducer and the temperature-reducing valve group to generate low-temperature low-pressure steam to enter an air cooling island so as to solve the problem that the air cooling island is frozen and cracked due to insufficient steam when a low-pressure cylinder is cut off by a steam turbine.
The invention can realize zero power of the low-pressure cylinder on the premise of safe operation of the air cooling island after cylinder cutting reconstruction of the direct air cooling type steam turbine unit. 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 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 direct air-cooled generating set cuts jar after transforming, 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 antifreeze apparatus used for the direct air cooling type generating set cylinder cutting reconstruction as claimed in claim 1, wherein: and 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).
3. The antifreeze apparatus used for the direct air cooling type generating set cylinder cutting reconstruction as claimed in claim 1, wherein: 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 antifreeze apparatus used for the direct air cooling type generating set cylinder cutting reconstruction as claimed in claim 3, wherein: 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 antifreeze apparatus used for the direct air cooling type generating set cylinder cutting reconstruction as claimed in claim 4, wherein: 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 antifreeze apparatus used for the direct air cooling type generating set cylinder cutting reconstruction as claimed in claim 4, wherein: 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 |
|---|---|---|---|
| CN201911341713.3A CN110926232A (en) | 2019-12-24 | 2019-12-24 | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911341713.3A CN110926232A (en) | 2019-12-24 | 2019-12-24 | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110926232A true CN110926232A (en) | 2020-03-27 |
Family
ID=69860754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911341713.3A Pending CN110926232A (en) | 2019-12-24 | 2019-12-24 | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110926232A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779551A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Anti-freezing system and method for cold end of steam turbine when low-pressure cylinder of air cooling unit is cut off |
| CN114458397A (en) * | 2022-01-05 | 2022-05-10 | 国网河北省电力有限公司电力科学研究院 | Method for enhancing winter starting performance of small-machine direct-discharge direct air cooling unit |
-
2019
- 2019-12-24 CN CN201911341713.3A patent/CN110926232A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779551A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Anti-freezing system and method for cold end of steam turbine when low-pressure cylinder of air cooling unit is cut off |
| CN111779551B (en) * | 2020-05-18 | 2022-06-07 | 华电电力科学研究院有限公司 | Anti-freezing system and method for cold end of steam turbine when low-pressure cylinder of air cooling unit is cut off |
| CN114458397A (en) * | 2022-01-05 | 2022-05-10 | 国网河北省电力有限公司电力科学研究院 | Method for enhancing winter starting performance of small-machine direct-discharge direct air cooling unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109798157B (en) | Condensing and back-pumping coupled steam extraction integrated system for thermoelectric unit power peak regulation and operation method thereof | |
| CN204063780U (en) | A kind of pipeline gas differential pressure refrigeration liquefying device in conjunction with nitrogen swell refrigeration | |
| CN110926232A (en) | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set | |
| CN111023859A (en) | Anti-freezing system and method for low-pressure cylinder zero-power operation air cooling island of direct air cooling unit | |
| CN109442817B (en) | Water power balance system of plant chilled water supply network | |
| WO2020253136A1 (en) | Energy storage and cooling system and method | |
| CN211782849U (en) | Air cooling island anti-freezing device used after cylinder transformation on direct air cooling type generator set | |
| CN109539820B (en) | Cooling tower anti-freezing system and adjusting method | |
| CN210178427U (en) | Long blade cooling system under cylinder cutting operation of steam turbine | |
| CN104880098A (en) | Condensing type turbo generator set vacuum pump preparation system and operation method thereof | |
| CN109653819B (en) | Deep peak-shaving steam turbine system of cogeneration unit and control method | |
| CN109611166B (en) | Condensing back-pumping heat supply system for variable working conditions of multi-low pressure cylinder steam turbine and operation method | |
| CN207652235U (en) | A kind of power station technical water supply system | |
| CN203925609U (en) | A kind of steam inlet device of small turbine | |
| CN210178431U (en) | System for cutting cylinder operation under partial load for steam turbine with multiple low-pressure cylinders | |
| CN204609957U (en) | A kind of Air-cooler Unit Feed Pump drive unit | |
| CN209277957U (en) | A kind of small machine Lubricating Oil temperature control device | |
| CN107238232B (en) | Regional centralized energy supply method | |
| CN203642538U (en) | Exhaust device for pipelines of solar water heating system | |
| CN220621973U (en) | Cooling steam system of thermoelectric unit | |
| CN211739929U (en) | Cooling pipeline system based on cooling water tower | |
| CN214944581U (en) | Shutdown cooling device of gas-steam combined cycle unit | |
| CN215929710U (en) | Device for improving heat supply capacity of 330MW wet-cold heat supply unit | |
| CN203797756U (en) | Continuous heating system for cogeneration | |
| CN219433359U (en) | Thermal power unit flexibility degree of depth peak shaver and thermal power unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |