CN103954169A - Method for washing air cooling island of first-startup unit in power plant - Google Patents
Method for washing air cooling island of first-startup unit in power plant Download PDFInfo
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- CN103954169A CN103954169A CN201410175955.0A CN201410175955A CN103954169A CN 103954169 A CN103954169 A CN 103954169A CN 201410175955 A CN201410175955 A CN 201410175955A CN 103954169 A CN103954169 A CN 103954169A
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Abstract
The invention relates to a method for washing an air cooling island of a first-startup unit in a power plant. By additionally arranging a temporary pipeline and a valve on an outlet pipeline of the air cooling island, washing water for the air cooling island can be timely recycled, so that the problem of low water production capacity of certain power plants is solved; meanwhile, after water meets a quality standard, a temporary system does not need to be disassembled temporarily, the unit can be directly grid-connected and loaded without shutdown of a boiler, and a certain construction period can be shortened.
Description
Technical field
The present invention relates to technical field of power generation, be specifically related to the Air-Cooling Island purging method that a kind of Electric Factory Air-Cooling unit starts first.
Background technology
Because Electric Factory Air-Cooling unit water-saving performance is remarkable, obtained application more and more widely.Direct Air-cooled Unit is high to water quality requirement, needs Air-Cooling Island to carry out cleaning down before putting into operation, and steam is introduced Air-Cooling Island pipeline and heat-exchanging tube bundle are carried out to hot cleaning, and dirt (being mainly iron oxide) is removed from system.The parts that clean comprise: steam discharge main pipeline, blow-off branch, steam-distributing pipe, heat radiation tube bank, condensate water collecting header, condensing water conduit etc.Unit purging method now can be divided into two stages: first stage connects temporary pipeline at Air-Cooling Island pipe outlet, and Air-Cooling Island is cleaned by column, and flushing water is directly drained; Second process Air-Cooling Island rinses after qualified (chemical examination condensate water water quality), recovers air cooling system, removes temporary pipeline, and condensate water reclaims, set grid-connection on-load.This purging method shortcoming is that one water consumption is huge, for reaching the qualified water quality that makes of Air-Cooling Island flushing, reaches unit starting requirement, for the low unit of chemical water-making ability, is a kind of restriction, needs a minute flushing several times, just can make water quality qualified; Shortcoming two is to rinse after qualified to need boiler shutdown, removes temporary pipeline, recover could again to light a fire by boiler after formal system, and set grid-connection on-load, complex operation inconvenience.
Summary of the invention
The object of the present invention is to provide a kind of simplely, can save the water yield, the Air-Cooling Island purging method that the Electric Factory Air-Cooling unit reducing costs starts first.
Technical scheme provided by the invention is:
The Air-Cooling Island purging method that Power Plant starts first, it comprises following steps:
Step 1: scrap build: install temporary pipeline additional connect the position of steam exhaust device on Air-Cooling Island condensing water conduit before, at described temporary pipeline, near Air-Cooling Island condensing water conduit one end, the second valve is set, the position on Air-Cooling Island condensing water conduit between described temporary pipeline and steam exhaust device arranges the first valve; At described temporary pipeline end, connect sewage collecting box; One end near sewage collecting box on temporary pipeline is provided with the sampling pipe that connects the 3rd valve;
Step 2: rinse Air-Cooling Island pipeline: when water quality is defective, open the second valve, close the first valve, flushing water is disposed to sewage collecting box;
Step 3: water quality monitoring: open the 3rd valve and obtain sample water, chemical examination water quality;
Step 4: collect condensed water: after water quality reaching standard, close the second valve, open the first valve, reclaim working-medium water.
As a further improvement on the present invention, the Air-Cooling Island purging method that Power Plant of the present invention starts first, wherein, in the process of step 2 ~ step 4, increase following operation: when the water level of sewage collecting box approaches the horizontal level of temporary pipeline outlet, sewage collecting box is carried out to moisturizing operation to guarantee that the water level of sewage collecting box is higher than the horizontal level of temporary pipeline outlet.
As a further improvement on the present invention, the Air-Cooling Island purging method that Power Plant of the present invention starts first, wherein, step 1 also comprises: described wastewater collection box top is connected with the moisturizing pipeline that maintains water level for amount of makeup water, and described moisturizing pipeline keeps water level in temporary pipeline outlet above water for amount of makeup water.
As a further improvement on the present invention, the Air-Cooling Island purging method that Power Plant of the present invention starts first, wherein, the interim water-level gauge that connects warning device is set at described sewage collecting box sidewall, described interim water-level gauge is used for pointing out instant water level, and described warning device declines and approaches temporary pipeline outlet horizontal plane alarm at water level.
As a further improvement on the present invention, the Air-Cooling Island purging method that Power Plant of the present invention starts first, wherein, described interim water level is counted magnetic turnover panel water-level gauge.
As a further improvement on the present invention, the Air-Cooling Island purging method that Power Plant of the present invention starts first, wherein, step 1 also comprises: the position that described sewage collecting box sidewall approaches top arranges overflow pipe, described overflow pipe connects bilge well.
The attainable technique effect of the present invention is:
(1) by install temporary pipeline and the first valve, the second valve additional at Air-Cooling Island condensing water conduit, can be by controlling the switching sequence of two valves, first, can realize the timely recovery of flushing water, save working-medium water, second, unit is direct grid-connected on-load in the situation that of not blowing out of boiler, overcome the problem of some power plant's water-making ability deficiency, increase work efficiency, the reduction of erection time.
(2), because air cooling system is in vacuum state, the water surface that interim blow-off line must be immersed in sewage collecting box avoids system vacuum to destroy below.As long as Air-Cooling Island condenser is under vacuum pressure, waste water in sewage collecting box will be back in Air-Cooling Island condensing water conduit along temporary pipeline, therefore sewage collecting box should possess water charging system, guarantee the water level of sewage collecting box, suggestion connects a moisturizing pipeline from demineralized water and guides to sewage collecting box and carry out moisturizing.
(3) wastewater collection upper box part should be provided with overflow pipe in addition, and overflow pipe is connected to bilge well or other sewage discharge device.
(4) at flushing water discharge tube, install sampling pipe and the 3rd valve additional, so that timely sample examination water quality.
Accompanying drawing explanation
Fig. 1 equipment connection schematic diagram of the present invention;
Wherein, 1 Air-Cooling Island condensing water conduit, 2 temporary pipelines, 3 moisturizing pipelines, 4 overflow pipes, 5 Air-Cooling Island vapour condensers, 6 steam exhaust devices, 7 condensate pumps, 8 first valves, 9 second valves, 10 the 3rd valves, 11 sewage collecting box, 12 bilge wells.
The specific embodiment
Below adopt specific embodiment that technique effect of the present invention is described, specific embodiment is not for technical scheme of the present invention is described but as the restriction of protection domain of the present invention.
Embodiment
Jian Tou Shahe, Hebei power plant new construction is the overcritical Air-cooled Unit of 2 * 600MW, and the direct air cooling system that #1 unit air cooling system adopts Jiangsu Shuan Liang air-conditioning limited company to produce adopts technical solution of the present invention to the flushing of this Air-Cooling Island, as follows:
The Air-Cooling Island purging method that Power Plant starts first, it comprises following steps:
Step 1: scrap build: install temporary pipeline 2 additional connect the position of steam exhaust device 6 on Air-Cooling Island condensing water conduit 1 before, at described temporary pipeline 2, near Air-Cooling Island condensing water conduit 1 one end, the second valve 9 is set, the position on Air-Cooling Island condensing water conduit 1 between described temporary pipeline 2 and steam exhaust device 6 arranges the first valve 8; At described temporary pipeline 2 ends, connect sewage collecting box 11; One end near sewage collecting box 11 on temporary pipeline 2 is provided with the sampling pipe that connects the 3rd valve 10; At described sewage collecting box 11 tops, be connected with the moisturizing pipeline 3 that maintains water level for amount of makeup water, the interim water-level gauge that connects warning device is set at described sewage collecting box 11 sidewalls, described interim water level is counted magnetic turnover panel water-level gauge, described interim water-level gauge is used for pointing out instant water level, and described warning device declines and approaches temporary pipeline 2 outlet horizontal plane alarms at water level; The position that described sewage collecting box 11 sidewalls approach top arranges overflow pipe 4, and described overflow pipe 4 connects bilge well 12;
Step 2: rinse Air-Cooling Island pipeline: when water quality is defective, open the second valve 9, close the first valve 8, flushing water is disposed to sewage collecting box 11;
Step 3: water quality monitoring: open the 3rd valve 10 and obtain sample water, chemical examination water quality;
Step 4: collect condensed water: after water quality reaching standard, close the second valve 9, open the first valve 8, reclaim working-medium water;
In the process of step 2 ~ step 4, proceed as follows: when the water level of sewage collecting box 11 approaches the horizontal level of temporary pipeline 2 outlets, sewage collecting box 11 is carried out to moisturizing operation to guarantee that the water level of sewage collecting box 11 is higher than the horizontal level of temporary pipeline 2 outlets.
As an alternative, in the present invention, moisturizing also can adopt the mode of artificial recharge to keep the water level of sewage collecting box 11, also can realize object of the present invention.
As an alternative, in the present invention, the monitoring water level of sewage collecting box 11 can adopt the mode of manual observation monitoring to carry out, and also can realize object of the present invention.
Overflow pipe 4 can solve hydraulic overflow problem, and described overflow pipe 4 also can be controlled the not overflow of sewage collecting box water by the mode that manual monitoring artificial water intaking reduce water level, also can realize the object of the invention.
The above embodiment is only the preferred embodiments of the present invention, and is not the exhaustive of the feasible enforcement of the present invention.For persons skilled in the art, any apparent change of under the prerequisite that does not deviate from the principle of the invention and spirit, it having been done, within all should being contemplated as falling with claim protection domain of the present invention.
Claims (6)
1. the Air-Cooling Island purging method that Power Plant starts first, is characterized in that comprising following steps:
Step 1: scrap build: install temporary pipeline (2) additional before the position of Air-Cooling Island condensing water conduit (1) upper connection steam exhaust device (6), at described temporary pipeline (2), near Air-Cooling Island condensing water conduit (1) one end, the second valve (9) is set, the position being positioned on Air-Cooling Island condensing water conduit (1) between described temporary pipeline (2) and steam exhaust device (6) arranges the first valve (8); At described temporary pipeline (2) end, connect sewage collecting box (11); In the upper one end near sewage collecting box (11) of temporary pipeline (2), be provided with the sampling pipe that connects the 3rd valve (10);
Step 2: rinse Air-Cooling Island pipeline: when water quality is defective, open the second valve (9), close the first valve (8), flushing water is disposed to sewage collecting box (11);
Step 3: water quality monitoring: open the 3rd valve (10) and obtain sample water, chemical examination water quality;
Step 4: collect condensed water: after water quality reaching standard, close the second valve (9), open the first valve (8), reclaim working-medium water.
2. the Air-Cooling Island purging method that Power Plant as claimed in claim 1 starts first, it is characterized in that: in the process of step 2 ~ step 4, increase following operation: when the water level of sewage collecting box (11) approaches the horizontal level of temporary pipeline (2) outlet, sewage collecting box (11) is carried out to moisturizing operation to guarantee that the water level of sewage collecting box (11) is higher than the horizontal level of temporary pipeline (2) outlet.
3. the Air-Cooling Island purging method that Power Plant as claimed in claim 2 starts first, it is characterized in that: step 1 also comprises: described sewage collecting box (11) top is connected with the moisturizing pipeline (3) that maintains water level for amount of makeup water, described moisturizing pipeline (3) keeps water level in temporary pipeline (2) outlet above water for amount of makeup water.
4. the Air-Cooling Island purging method that Power Plant as claimed in claim 3 starts first, it is characterized in that: the interim water-level gauge that connects warning device is set at described sewage collecting box (11) sidewall, described interim water-level gauge is used for pointing out instant water level, and described warning device declines and approaches temporary pipeline (2) outlet horizontal plane alarm at water level.
5. the Air-Cooling Island purging method that Power Plant as claimed in claim 4 starts first, is characterized in that: described interim water level is counted magnetic turnover panel water-level gauge.
6. the Air-Cooling Island purging method that the Power Plant as described in any one in claim 1 ~ 5 starts first, it is characterized in that: step 1 also comprises: the position that approaches top at described sewage collecting box (11) sidewall arranges overflow pipe (4), described overflow pipe (4) connects bilge well (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175955.0A CN103954169A (en) | 2014-04-29 | 2014-04-29 | Method for washing air cooling island of first-startup unit in power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410175955.0A CN103954169A (en) | 2014-04-29 | 2014-04-29 | Method for washing air cooling island of first-startup unit in power plant |
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| CN103954169A true CN103954169A (en) | 2014-07-30 |
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| CN201410175955.0A Pending CN103954169A (en) | 2014-04-29 | 2014-04-29 | Method for washing air cooling island of first-startup unit in power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279259A (en) * | 2021-11-18 | 2022-04-05 | 国网河北省电力有限公司电力科学研究院 | Air cooling island hot state flushing device |
| CN114279260A (en) * | 2021-11-18 | 2022-04-05 | 国网河北省电力有限公司电力科学研究院 | Air cooling island hot state flushing device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62280592A (en) * | 1986-05-28 | 1987-12-05 | Hitachi Ltd | Back washing device for condenser |
| CN101655335A (en) * | 2008-08-19 | 2010-02-24 | 华北电力科学研究院有限责任公司 | Device and method for thermal cleaning of direct air cooling system |
| CN102564216A (en) * | 2012-02-22 | 2012-07-11 | 河南电力试验研究院 | Method for washing condenser of thermal power plant without intermission |
| CN202757524U (en) * | 2012-08-31 | 2013-02-27 | 首钢京唐钢铁联合有限责任公司 | Cooling system capable of cleaning heat exchanger on line |
-
2014
- 2014-04-29 CN CN201410175955.0A patent/CN103954169A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62280592A (en) * | 1986-05-28 | 1987-12-05 | Hitachi Ltd | Back washing device for condenser |
| CN101655335A (en) * | 2008-08-19 | 2010-02-24 | 华北电力科学研究院有限责任公司 | Device and method for thermal cleaning of direct air cooling system |
| CN102564216A (en) * | 2012-02-22 | 2012-07-11 | 河南电力试验研究院 | Method for washing condenser of thermal power plant without intermission |
| CN202757524U (en) * | 2012-08-31 | 2013-02-27 | 首钢京唐钢铁联合有限责任公司 | Cooling system capable of cleaning heat exchanger on line |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279259A (en) * | 2021-11-18 | 2022-04-05 | 国网河北省电力有限公司电力科学研究院 | Air cooling island hot state flushing device |
| CN114279260A (en) * | 2021-11-18 | 2022-04-05 | 国网河北省电力有限公司电力科学研究院 | Air cooling island hot state flushing device and method |
| CN114279259B (en) * | 2021-11-18 | 2024-01-23 | 国网河北省电力有限公司电力科学研究院 | Thermal state flushing device for air cooling island |
| CN114279260B (en) * | 2021-11-18 | 2024-01-23 | 国网河北省电力有限公司电力科学研究院 | Device and method for hot flushing air cooling island |
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Application publication date: 20140730 |