CN105823345A - Circulating cooling water neighbor connection system applied to cold end systems of indirect air cooling units - Google Patents
Circulating cooling water neighbor connection system applied to cold end systems of indirect air cooling units Download PDFInfo
- Publication number
- CN105823345A CN105823345A CN201610307198.7A CN201610307198A CN105823345A CN 105823345 A CN105823345 A CN 105823345A CN 201610307198 A CN201610307198 A CN 201610307198A CN 105823345 A CN105823345 A CN 105823345A
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- Prior art keywords
- unit
- air cooling
- pipeline
- butterfly valve
- electric butterfly
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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
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
- F28B9/06—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid
-
- 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
The invention discloses a circulating cooling water neighbor connection system applied to cold end systems of indirect air cooling units. The circulating cooling water neighbor connection system comprises the first air cooling unit and the second air cooling unit, wherein the first air cooling unit and the second air cooling unit are of the same structure; a pipeline between a first unit air cooling tower and a first unit condenser communicates with a pipeline between a second unit air cooling tower and a second unit condenser through a first connection pipeline; a pipeline between a first unit circulating water pump and the first unit air cooling tower communicates with a pipeline between a second unit circulating water pump and the second unit air cooling tower through a second connection pipeline. According to the system, the temperature of circulating cooling water at an inlet of the unit condenser in operation can be lowered without changing other parameters, the backpressure of unit operation can be lowered, and the purposes of saving the energy, lowering the consumption and improving the unit output can be realized. According to the key technology, circulating cooling water systems between the units are connected through corresponding valves and pipelines, and the cooling capacity of the cold end systems is improved through the idle air cooling tower of the unit out of operation.
Description
[technical field]
The invention belongs to Power Plant Energy Saving field, relate to a kind of recirculated cooling water neighbour's machine contacted system being applied to indirect air cooling unit cold end system.
[background technology]
In domestic more than ten years of air cooling technique fast development, have accumulated substantial amounts of operating experience.By such environmental effects substantially (predominantly ambient temperature, environment strong wind, hot air reflux etc.), summer high temperature period unit is in high back pressure and runs Direct Air-cooled Unit, and energy consumption is high, exerts oneself limited.In recent years, SCAL type indirect air cooling technology enjoys favor, it is with demineralized water as heat carrier, the thermic load of turbine discharge is transferred to surrounding air, the desalination water yield is relatively big (as a example by 600MW grade unit, circulating water flow design load is about at about 65000t/h), affected by environment the most inconspicuous.But several years service data shows, between part, the cold group summer high temperature period also occurs running back pressure height, and unit output is limited, the phenomenon that energy consumption is high.
Part of generating units is provided with indirect cool tower radiator spraying system, i.e. high temperature period and the demineralized water of atomization is sprayed on spreader surface, utilizes water vapor heat absorption to reduce radiator intake air temperature；The water droplet the most not vaporized relies on air flowing to be carried along into spreader surface heat absorption；Thus improve radiator heat exchange property, reduce unit operation back pressure.But this system fall back pressure effect is limited, but having a disadvantage in that 1) demineralized water waste is big, in cool water shower to air, it is impossible to reclaim, make rate of water consumed in electric generator increase, increase operating cost；2) cool down air humidity increasing after water spray, heat radiator fin tube-surface humidity increases, and makes the dust in air be easier to stick on heat radiator fin pipe, causes finned tube stolen goods dirt degree to strengthen, and heat exchange efficiency declines.
[summary of the invention]
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, a kind of recirculated cooling water neighbour's machine contacted system being applied to indirect air cooling unit cold end system is provided, on the premise of relatively small to the shake-up of unit original system, by arranging corresponding valve and pipeline, two machine circulations are got in touch with, annual May to October ambient temperature higher, and during certain unit outage, utilize the air cooling tower that this unit is idle, improve cold end system cooling capacity, reduce unit operation back pressure, reach energy-saving and cost-reducing purpose.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions:
It is applied to recirculated cooling water neighbour's machine contacted system of indirect air cooling unit cold end system, No. 1 indirect air cooling unit identical including two groups of structures and No. 2 indirect air cooling units, the outlet of the condenser often organizing Air-cooled Unit connects water circulating pump, recirculated water delivery side of pump connects air cooling tower, and the outlet of air cooling tower connects the entrance of condenser；Pipeline between No. 1 unit air cooling tower and No. 1 unit condenser is connected by the pipeline between the first contact pipeline and No. 2 unit air cooling towers and No. 2 unit condensers；Pipeline between No. 1 unit water circulating pump and No. 1 unit air cooling tower is connected by the pipeline between the second contact pipeline and No. 2 unit water circulating pumps and No. 2 unit air cooling towers.
The present invention is further improved by:
First electric butterfly valve is set on the pipeline between described No. 2 unit air cooling towers and No. 2 unit condensers, the pipeline between No. 1 unit air cooling tower and No. 1 unit condenser arranges the second electric butterfly valve；One end of first contact pipeline is arranged on the pipeline between the entrance of the first electric butterfly valve and No. 2 unit air cooling towers, and the other end is arranged on the pipeline between the entrance of the second electric butterfly valve and No. 1 unit air cooling tower.
Described No. 1 unit water circulating pump and No. 2 unit water circulating pumps are provided with three outlets, and three tunnels converge after be respectively connecting to No. 1 unit air cooling tower and the entrance of No. 2 unit air cooling towers；One outlet of No. 1 unit water circulating pump arranges the 3rd electric butterfly valve, and an outlet of No. 2 unit water circulating pumps arranges the 4th electric butterfly valve；One end of second contact pipeline is arranged on the pipeline between the entrance of the 3rd electric butterfly valve and No. 2 unit water circulating pumps, and the other end is arranged on the pipeline between the entrance of the 4th electric butterfly valve and No. 2 unit water circulating pumps.
It is provided with the 5th electric butterfly valve on described first contact pipeline, the second liaison officer road is provided with the 6th electric butterfly valve.
Compared with prior art, the method have the advantages that
The present invention is by the cooling water recirculation system UNICOM of two groups of identical for two groups of structures Air-cooled Unit, respective valves and pipeline are set, annual May to October ambient temperature higher, and during certain unit outage, utilize the air cooling tower that this unit is idle, improve cold end system cooling capacity, in the case of other parameters (unit load, ambient air temperature, the water circulating pump method of operation) are constant, reduce the circulating cooling coolant-temperature gage of operating unit condenser entrance, reduce unit operation back pressure.
[accompanying drawing explanation]
Fig. 1 is the overall structure schematic diagram of the present invention.
[detailed description of the invention]
Below in conjunction with the accompanying drawings the present invention is described in further detail:
Seeing Fig. 1, the present invention includes No. 1 Air-cooled Unit that two groups of structures are identical and No. 2 Air-cooled Unit, and the outlet of the condenser often organizing Air-cooled Unit connects water circulating pump, and recirculated water delivery side of pump connects air cooling tower, and the outlet of air cooling tower connects the entrance of condenser；Pipeline between No. 1 unit air cooling tower 3 and No. 1 unit condenser 1 is connected with the pipeline between No. 2 unit air cooling towers 4 and No. 2 unit condensers 6 by the first contact pipeline 13；Pipeline between No. 1 unit water circulating pump 2 and No. 1 unit air cooling tower 3 is connected with the pipeline between No. 2 unit water circulating pumps 5 and No. 2 unit air cooling towers 4 by the second contact pipeline 14.Arrange on pipeline between No. 2 unit air cooling towers 4 and No. 2 unit condensers 6 and on the pipeline between 7, No. 1 unit air cooling tower 3 of the first electric butterfly valve and No. 1 unit condenser 1, second electric butterfly valve 11 is set；One end of first contact pipeline 13 is arranged on the pipeline between the entrance of the first electric butterfly valve 7 and No. 2 unit air cooling towers 4, and the other end is arranged on the pipeline between the entrance of the second electric butterfly valve 11 and No. 1 unit air cooling tower 3.No. 1 unit water circulating pump 2 and No. 2 unit water circulating pumps 5 are provided with three outlets, and three tunnels converge after be respectively connecting to No. 1 unit air cooling tower 3 and the entrance of No. 2 unit air cooling towers 4；One outlet of No. 1 unit water circulating pump 2 arranges the 3rd electric butterfly valve 12, and an outlet of No. 2 unit water circulating pumps 5 arranges the 4th electric butterfly valve 8；One end of second contact pipeline 14 is arranged on the pipeline between the entrance of the 3rd electric butterfly valve 12 and No. 2 unit water circulating pumps 2, and the other end is arranged on the pipeline between the entrance of the 4th electric butterfly valve 8 and No. 2 unit water circulating pumps 5.It is provided with the 5th electric butterfly valve 9 on first contact pipeline 13, the second liaison officer road 14 is provided with the 6th electric butterfly valve 10.
During duplex running, the 5th electric butterfly valve 9 and the 6th electric butterfly valve 10 are closed, the first electric butterfly valve the 7, the 3rd electric butterfly valve the 12, second electric butterfly valve 11 and the 4th electric butterfly valve 8 standard-sized sheet, it is achieved the original unit style of unit runs；Or by the first electric butterfly valve the 7, second electric butterfly valve the 11, the 3rd electric butterfly valve the 12, the 4th electric butterfly valve the 8, the 5th electric butterfly valve 9 and the 6th electric butterfly valve 10 standard-sized sheet, realize unit Expanding Unit Element System to run, can realize the rational allocation of circulating water flow during because of unit load difference, the method for operation is the most flexible.
If No. 1 unit outage, during No. 2 unit unit operations, close the second electric butterfly valve 11 and the 4th electric butterfly valve 8, open the 5th electric butterfly valve 9 and the 6th electric butterfly valve 10.It is back to No. 2 unit condenser inlet ducts after the circulating hot water of No. 2 unit list pump discharges is introduced the air cooling tower cooling of No. 1 unit, reduces and run back pressure.
If No. 2 unit outages, during No. 1 unit unit operation, close the first electric butterfly valve 7 and the 3rd electric butterfly valve 12, open the 5th electric butterfly valve 9 and the 6th electric butterfly valve 10.It is back to No. 1 unit condenser inlet duct after the circulating hot water of No. 1 unit list pump discharge is introduced the air cooling tower cooling of No. 2 units, reduces and run back pressure.
The principle of the present invention:
Annual May to October ambient temperature higher, and during adjacent machine stoppage in transit, the air cooling tower that the recirculated water that part condenser exports is drained into stoppage in transit unit idle cools down, remaining recirculated water still enters the machine air cooling tower and cools down, two strands of recirculated cooling waters going out air cooling tower converge entrance operating unit condenser, complete a circulation.In the case of other parameters (unit load, ambient air temperature, the water circulating pump method of operation) are constant, the recirculated cooling water temperature drop entering condenser is low, and unit operation back pressure declines accordingly, the purpose of the unit output that reaches to save energy and reduce the cost, improve.
As a example by certain 600MW grade supercritical SCAL type indirect air cooling unit, unit load 440MW, ambient temperature 36.89 DEG C, run back pressure after transformation and decline 6kPa.Conversion single unit average of the whole year coal consumption declines 0.6g/kW h.
Above content is only the technological thought that the present invention is described, it is impossible to limiting protection scope of the present invention with this, every technological thought proposed according to the present invention, any change done on the basis of technical scheme, within each falling within the protection domain of claims of the present invention.
Claims (4)
1. it is applied to recirculated cooling water neighbour's machine contacted system of indirect air cooling unit cold end system, it is characterized in that, No. 1 indirect air cooling unit identical including two groups of structures and No. 2 indirect air cooling units, the outlet of the condenser often organizing Air-cooled Unit connects water circulating pump, recirculated water delivery side of pump connects air cooling tower, and the outlet of air cooling tower connects the entrance of condenser；Pipeline between No. 1 unit air cooling tower (3) and No. 1 unit condenser (1) is connected with the pipeline between No. 2 unit air cooling towers (4) and No. 2 unit condensers (6) by the first contact pipeline (13)；Pipeline between No. 1 unit water circulating pump (2) and No. 1 unit air cooling tower (3) is connected with the pipeline between No. 2 unit water circulating pumps (5) and No. 2 unit air cooling towers (4) by the second contact pipeline (14).
The recirculated cooling water neighbour's machine contacted system being applied to indirect air cooling unit cold end system the most according to claim 1, it is characterized in that, first electric butterfly valve (7) is set on the pipeline between described No. 2 unit air cooling towers (4) and No. 2 unit condensers (6), the pipeline between No. 1 unit air cooling tower (3) and No. 1 unit condenser (1) arranges the second electric butterfly valve (11)；One end of first contact pipeline (13) is arranged on the pipeline between the entrance of the first electric butterfly valve (7) and No. 2 unit air cooling towers (4), and the other end is arranged on the pipeline between the entrance of the second electric butterfly valve (11) and No. 1 unit air cooling tower (3).
The recirculated cooling water neighbour's machine contacted system being applied to indirect air cooling unit cold end system the most according to claim 1, it is characterized in that, described No. 1 unit water circulating pump (2) and No. 2 unit water circulating pumps (5) are provided with three outlets, and three tunnels converge after be respectively connecting to No. 1 unit air cooling tower (3) and the entrance of No. 2 unit air cooling towers (4)；One outlet of No. 1 unit water circulating pump (2) arranges the 3rd electric butterfly valve (12), and an outlet of No. 2 unit water circulating pumps (5) arranges the 4th electric butterfly valve (8)；One end of second contact pipeline (14) is arranged on the pipeline between the entrance of the 3rd electric butterfly valve (12) and No. 2 unit water circulating pumps (2), and the other end is arranged on the pipeline between the entrance of the 4th electric butterfly valve (8) and No. 2 unit water circulating pumps (5).
4. according to the recirculated cooling water neighbour's machine contacted system being applied to indirect air cooling unit cold end system described in claim 1-3 any one, it is characterized in that, it is provided with the 5th electric butterfly valve (9) in described first contact pipeline (13), the second liaison officer road (14) is provided with the 6th electric butterfly valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307198.7A CN105823345A (en) | 2016-05-10 | 2016-05-10 | Circulating cooling water neighbor connection system applied to cold end systems of indirect air cooling units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307198.7A CN105823345A (en) | 2016-05-10 | 2016-05-10 | Circulating cooling water neighbor connection system applied to cold end systems of indirect air cooling units |
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| CN105823345A true CN105823345A (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610307198.7A Pending CN105823345A (en) | 2016-05-10 | 2016-05-10 | Circulating cooling water neighbor connection system applied to cold end systems of indirect air cooling units |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124622A (en) * | 2019-12-30 | 2021-07-16 | 中国大唐集团科技工程有限公司 | Device for improving stability of indirect cooling system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3881548A (en) * | 1971-07-14 | 1975-05-06 | Westinghouse Electric Corp | Multi-temperature circulating water system for a steam turbine |
| CN103245205A (en) * | 2013-05-16 | 2013-08-14 | 国家电网公司 | Combined condensed steam heat exchange system for direct air cooling steam turbine |
| CN203978530U (en) * | 2014-04-11 | 2014-12-03 | 天津陈塘热电有限公司 | The expanding unit vacuum system processed of Gas-steam Combined Cycle unit |
| CN205580234U (en) * | 2016-05-10 | 2016-09-14 | 西安西热节能技术有限公司 | Contact of recirculated cooling water neighbour machine system for indirect air cooling unit cold end system |
-
2016
- 2016-05-10 CN CN201610307198.7A patent/CN105823345A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3881548A (en) * | 1971-07-14 | 1975-05-06 | Westinghouse Electric Corp | Multi-temperature circulating water system for a steam turbine |
| CN103245205A (en) * | 2013-05-16 | 2013-08-14 | 国家电网公司 | Combined condensed steam heat exchange system for direct air cooling steam turbine |
| CN203978530U (en) * | 2014-04-11 | 2014-12-03 | 天津陈塘热电有限公司 | The expanding unit vacuum system processed of Gas-steam Combined Cycle unit |
| CN205580234U (en) * | 2016-05-10 | 2016-09-14 | 西安西热节能技术有限公司 | Contact of recirculated cooling water neighbour machine system for indirect air cooling unit cold end system |
Non-Patent Citations (1)
| Title |
|---|
| 李旭，李明，章冰: "改变循环水系统运行方式提高凝汽器真空", 《热力发电》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124622A (en) * | 2019-12-30 | 2021-07-16 | 中国大唐集团科技工程有限公司 | Device for improving stability of indirect cooling system |
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Application publication date: 20160803 |