CN101655335B - Device and method for thermal cleaning of direct air cooling system - Google Patents
Device and method for thermal cleaning of direct air cooling system Download PDFInfo
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- CN101655335B CN101655335B CN2008101185476A CN200810118547A CN101655335B CN 101655335 B CN101655335 B CN 101655335B CN 2008101185476 A CN2008101185476 A CN 2008101185476A CN 200810118547 A CN200810118547 A CN 200810118547A CN 101655335 B CN101655335 B CN 101655335B
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- 238000001816 cooling Methods 0.000 title claims abstract description 124
- 238000004140 cleaning Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000002351 wastewater Substances 0.000 claims abstract description 21
- 238000011084 recovery Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 7
- 238000005265 energy consumption Methods 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 230000005611 electricity Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 moisturizing ability Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to a device and a method for the thermal cleaning of a direct air cooling system. The device comprises a steam discharge device of the direct air cooling system, a plurality of condensed water recycling pipes and a temporary cleaning waste water discharge pipe, wherein the steam discharge device of the direct air cooling system is connected with a plurality of air cooling condensers through a direct air cooling steam discharge pipe; the plurality of condensed water recycling pipes is correspondingly connected with the plurality of air cooling condensers; the temporary cleaning waste water discharge pipe is connected with the plurality of condensed water recycling pipes to discharge the wastewater after cleaning; the plurality of condensed water recycling pipes are connected with the stream discharge device of the direct air cooling system and recycling valves are arranged between the plurality of condensed water recycling pipes and the stream discharge device of the direct air cooling system; and discharge valves are arranged between the plurality of condensed water recycling pipes and the temporary cleaning waste water discharge pipe. The invention greatly reduces demineralized water, fuel and energy consumption, effectively reduces the periods of the thermal cleaning of the direct air cooling system and the modulation of the startup of thermal generator sets and creates quick investment benefits.
Description
Technical field
The present invention relates to cooling technology field, power plant, particularly relevant for hot cleaning device of a kind of direct air cooling system and method.
Background technology
The steam of discharging after the steam turbine work done in the thermal power plant mainly adopts dual mode to cool off and reclaims its condensate water, i.e. water cooling (abbreviation water-cooled) and air cooling (abbreviation air cooling).Existing thermal power plant is most of adopts Water Cooling Technology, because the water evaporation loss needs to consume a large amount of water.Along with expanding economy, water resource is in short supply day by day, and the water intaking price rises year by year, directly causes the thermal power plant cost to increase, and the environmental issue that aqueous vapor pollution simultaneously brings is also more and more outstanding.Therefore, the traditional water refrigeration technique is the more and more requirement in incompatibility epoch, air-cooled technology is developed and used in countries in the world gradually, comprises indirect air cooling and direct air cooling (abbreviation Direct Air-Cooled) two big classes, uses Direct Air-Cooled comparatively generally at present.
Adopt the cooling system of Direct Air-Cooling Technology to be called direct air cooling system.As shown in Figure 1, its basic structural unit is an air cooling tubes condenser 4, comprises steam distributing pipe road 5, heat-exchanging tube bundle 6, condensate water lower collecting box 7.After the steam that steam turbine 1 is discharged enters steam exhaust device 3 by the turbine discharge pipeline, introduce air cooling tubes condenser 4 by Direct Air-Cooled blow-off line 2.The cooling blower 8 of air cooling tubes condenser 4 belows rotates, and provides cooling air to air cooling tubes condenser 4.Steam enters condensate water lower collecting box 7 after heat-exchanging tube bundle 6 inside of air cooling tubes condenser 4 are cooled to condensate water by air, enter steam exhaust device 3 by condensate return pipe road 9 then, boost by condensate pump 10, through condensing polishing unit 11, enter therrmodynamic system 13, finish the thermodynamic cycle of working medium heating, evaporation, work done, cooling.Above-mentioned Direct Air-Cooled blow-off line 2, air cooling tubes condenser 4, cooling blower 8, condensate return pipe road 9 and steam exhaust device 3 have just constituted direct air cooling system.
Because the difference of thermal power generation unit capacity and addressing, the design cooling capacity and the arrangement of its direct air cooling system also have nothing in common with each other.As shown in Figures 2 and 3, the direct air cooling system of certain 600MW generating set is divided into 8 row layouts, and each row comprises 7 air cooling tubes condensers, has correspondingly also increased steam distributing valve door 14.In addition, condensate return pipe road 9 also according to convenient, the principle branch is arranged flexibly, but finally all get back to steam exhaust device 3.
The steam exhaust device 3 of direct air cooling system, Direct Air-Cooled blow-off line 2, air cooling tubes condenser 4, condensate return pipe road 9 can be owing to contact with air at inner surface generation iron rust after installing, and also residual welding slag of portion and dust and dirt within it in the on-site installation work process.In addition, surpass 3 months if generating set is shut down, above-mentioned inner surface also can produce iron rust, and main component is an iron oxide.The existence of iron oxide will bring adverse effect to system's commencement of commercial operation, as stop up filter screen in the therrmodynamic system 13, make condense that polishing unit 11 lost efficacy, therrmodynamic system carbonated drink quality is defective or the like, cause generating set can't safety, stable operation.Therefore, the debug phase after installation, must clean steam exhaust device 3, Direct Air-Cooled blow-off line 2, air cooling tubes condenser 4, condensate return pipe road 9 etc., be called the hot cleaning of direct air cooling system.
At direct air cooling system as shown in Figure 2, existing hot cleaning device and method are as shown in Figure 4, clean used steam and come from turbine by-pass pipeline 15, steam enters direct air cooling system steam exhaust device 3, Direct Air-Cooled blow-off line 2, air cooling tubes condenser 4 is cleaned, steam is cooled to condensate water, carries a large amount of iron oxide and impurity and enters condensate return pipe road 9.Condensate return pipe road 9 is disconnected before entering steam exhaust device 3, enters cleaning sewage collecting box 18 by cleaning discharge of wastewater temporary pipeline 17, near the catch-basin 21 being disposed to by the overflow pipe 20 that cleans sewage collecting box 18 tops again.Can not reclaim owing to clean waste water, need replenish clean demineralized water to keep the working medium balance of system by 16 pairs of therrmodynamic systems of demineralized water moisturizing pipeline.On cleaning discharge of wastewater temporary pipeline 17, be connected to chemical sampling flexible pipe 19,, reach recovery standard (content that mainly is iron oxide is reduced to criterion of acceptability), just can finish hot cleaning until condensate water to cleaning waste water continuous sampling chemical examination.
After hot cleaning finished, all systems of thermal power plant were out of service, will clean discharge of wastewater temporary pipeline 17 and clean sewage collecting box 18 dismountings, returned to normal operating mode.When the thermal power plant starts once more, the condensate water of direct air cooling system will be recovered to steam exhaust device 3 by formal condensate return pipe road 9.
With the 600MW generating set is example, and existing hot cleaning device and method have following shortcoming:
1, recover normal overall process to system and expend time in longly from beginning hot the cleaning, generally need 7-10 days, generating set can not carry out other work during this period, can not generate electricity by way of merging two or more grid systems.
2, to be used for the demineralized water consumption that system replenishes very big, and about 200 tons/hour, reached the limit of thermal power plant demineralized water system water, moisturizing ability, finishing hot cleaning needs 30000-50000 tons demineralized water altogether.
3, in order to be provided for the steam of hot cleaning, consume a large amount of fuel (comprising coal and oil), per hour need 20 tons of standard coals approximately.
4, hot wash phase requires that all auxiliary equipment (comprising water pump, blower fan etc.) must turn round all the time in the power plant, and the consumption of electric energy is very big, and station service power reaches about 15MW.
Summary of the invention
The purpose of this invention is to provide hot cleaning device of a kind of direct air cooling system and method, can when carrying out hot cleaning, generating set be generated electricity by way of merging two or more grid systems, can also finish relevant experiment work simultaneously.
For achieving the above object, the invention provides the hot cleaning device of a kind of direct air cooling system, this device comprises at least: the direct air cooling system steam exhaust device is connected with a plurality of air cooling tubes condensers by the Direct Air-Cooled blow-off line; A plurality of condensate return pipes road is with the corresponding connection of described a plurality of air cooling tubes condensers; Clean the discharge of wastewater temporary pipeline, link to each other, the waste water after cleaning is discharged with described a plurality of condensate return pipes road; Described a plurality of condensate return pipes road links to each other with the steam exhaust device of direct air cooling system and the recovery valve is set between the two; Between described a plurality of condensate return pipes road and cleaning discharge of wastewater temporary pipeline, vent valves is set.
Described a plurality of air cooling tubes condenser grouping is provided with, and the every group of pairing condensate return pipe of air cooling tubes condenser road is connected with cleaning discharge of wastewater temporary pipeline with the steam exhaust device of direct air cooling system respectively.
For achieving the above object, the present invention also provides a kind of direct air cooling system hot cleaning method, and this method may further comprise the steps:
A., the recovery valve is set between the steam exhaust device of a plurality of condensate return pipes road and direct air cooling system, between a plurality of condensate return pipes road and cleaning discharge of wastewater temporary pipeline, vent valves is set simultaneously;
B. air cooling tubes condenser is divided at least two groups, closes all steam distributing valve doors of direct air cooling system;
C. in unwashed air cooling tubes condenser, select one group, open pairing steam distributing valve door of this group air cooling tubes condenser and vent valves, close the recovery valve, steam is introduced direct air cooled condenser carry out hot cleaning, steam after the cleaning is cooled to condensate water, discharge by the vent valves of having opened on the pairing condensate return pipe of this group air cooling tubes condenser road, close this vent valves after water quality is qualified, open and reclaim valve, the condensate water that water quality is qualified reclaims and enters the steam exhaust device of direct air cooling system;
Repeating step C finishes until all air cooling tubes condensers cleanings.
Wherein, described steam is to provide by turbine by-pass pipeline or steam turbine.
The invention has the beneficial effects as follows thus: can be applied to various types of direct air cooling system, by with the grouping of the air cooling tubes condenser of direct air cooling system and corresponding recovery valve and vent valves are set, different air cooling tubes condenser groups are carried out hot cleaning successively and according to the chemical sampling result of laboratory test its condensate water are discharged respectively or reclaimed, can and reclaim its qualified condensate water with the timely normal operation input of the air cooling tubes condenser that cleans up, continue simultaneously other sordid air cooling tubes condenser is carried out hot cleaning and discharges its defective condensate water.Generating set can generate electricity by way of merging two or more grid systems during this period, can also finish relevant experiment work simultaneously.After hot cleaning finished, the thermal power plant does not need to shut down removed hot cleaning temporary system, can directly change normal operating mode over to.The present invention can reduce the consumption of demineralized water, fuel, electric energy significantly, effectively shortens the duration of hot cleaning of direct air cooling system and unit starting debugging, makes thermal power generation unit performance returns of investment as early as possible.
Description of drawings
Fig. 1 is turbine discharge and direct air cooling system schematic diagram;
Fig. 2 is that certain 600MW unit direct air cooling system is arranged schematic diagram;
Fig. 3 is certain 600MW unit direct air cooling system scene photograph;
Fig. 4 is the hot cleaning device of existing direct air cooling system;
Fig. 5 is an embodiment of the hot cleaning device of direct air cooling system provided by the invention:
Fig. 6 is that another kind of 600MW unit direct air cooling system is arranged schematic diagram;
Fig. 7 is another embodiment of the hot cleaning device of direct air cooling system provided by the invention;
Fig. 8 is the flow chart of the hot cleaning method of direct air cooling system provided by the invention.
Symbol description:
1: steam turbine; 2: the Direct Air-Cooled blow-off line; 3: steam exhaust device; 4: air cooling tubes condenser; 5: the steam distributing pipe road; 6: heat-exchanging tube bundle; 7: the condensate water lower collecting box; 8: cooling blower; 9: the condensate return pipe road; 10: condensate pump; 11: polishing unit condenses; 12: the turbine discharge pipeline; 13: therrmodynamic system; 14: the steam distributing valve door; 15: the turbine by-pass pipeline; 16: demineralized water moisturizing pipeline; 17: clean the discharge of wastewater pipeline; 18: clean sewage collecting box; 19: the chemical sampling flexible pipe; 20: overflow pipe; 21: catch-basin; 22:1/2/7/8 row Direct Air-Cooled condensate water reclaims valve; 23:1/2/7/8 row Direct Air-Cooled condensate water vent valves; 24:3/4/5/6 row Direct Air-Cooled condensate water reclaims valve; 25:3/4/5/6 row Direct Air-Cooled condensate water vent valves; 26: the condensing water conduit isolating valve; 27:1/2/3/4 row Direct Air-Cooled condensate water reclaims valve; 28:1/2/3/4 row Direct Air-Cooled condensate water vent valves; 29:5/6/7/8 row Direct Air-Cooled condensate water reclaims valve; 30:5/6/7/8 row Direct Air-Cooled condensate water vent valves; 31: the condensate water total pipeline.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clear more understandable,, the present invention is described in further details below in conjunction with accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
In embodiments of the present invention, be example all with 8 row air cooling tubes condensers at present commonly used, but actual when implementing technical scheme of the present invention, be not limited in this, and its packet mode, also can be according to actual needs, arbitrarily distribute, but all should be included under the principle of the present invention.
Embodiment 1
Direct air cooling system as shown in Figure 2, it is a kind of air cooling tubes condenser arrangement relatively more commonly used at present, the condensate water of its 1/2/7/8 row air cooling tubes condenser is that the condensate return pipe road 9 by separately is recycled to steam exhaust device 3 respectively, and the condensate water of its 3/4/5/6 row air cooling tubes condenser is to be incorporated into a condensate return pipe road 9 to be recycled to steam exhaust device 3.At the existing hot cleaning device of this direct air cooling system and method as shown in Figure 4.
The embodiment that the present invention is directed to existing direct air cooling system shown in Figure 2 disconnected the condensate return pipe road 9 of 1/2/7/8 row air cooling tubes condenser and merges to a pipeline as shown in Figure 5 before entering steam exhaust device 3; The condensate return pipe road 9 of 3/4/5/6 row air cooling tubes condenser disconnected before entering steam exhaust device 3 and merge to a pipeline; Increase by 4 valves, be respectively that 1/2/7/8 row Direct Air-Cooled condensate water reclaims valve 22,1/2/7/8 row Direct Air-Cooled condensate water vent valves 23,3/4/5/6 row Direct Air-Cooled condensate water recovery valve 24,3/4/5/6 row Direct Air-Cooled condensate water vent valves 25, be connected to corresponding pipeline behind above-mentioned 4 valves.Other system's mounting arrangements is basic identical with existing hot cleaning method.
Please refer to Fig. 8, is the flow chart of the hot cleaning method of direct air cooling system provided by the invention.When the cleaning device that uses present embodiment to provide cleans, within the 1st day after the hot cleaning of direct air cooling system begins, steam enters 1/2 row or 7/8 row air cooling tubes condenser by turbine by-pass pipeline 15, steam exhaust device 3 and Direct Air-Cooled blow-off line 2, the corresponding 1/2/7/8 row Direct Air-Cooled condensate water of closing reclaims valve 22, open 1/2/7/8 row Direct Air-Cooled condensate water vent valves 23, close 3/4/5/6 row Direct Air-Cooled condensate water and reclaim valve 24 and 3/4/5/6 row Direct Air-Cooled condensate water vent valves 25.In this stage, unit can not generate electricity by way of merging two or more grid systems.Rule of thumb, with the time that needs about 1 day are finished in the hot cleaning of 1/2 row air cooling tubes condenser, its condensate water can reach the standard of qualified recovery.
After hot cleaning entered the 2nd day, steam turbine started, and increased the steam total amount, and unit can generate electricity by way of merging two or more grid systems, and its generated output can reach 25% of designed capacity.Close turbine by-pass pipeline 15,, will clean steam and be incorporated into 1/2/3/4 row air cooling tubes condenser 4 by turbine discharge pipeline 12, steam exhaust device 3 and Direct Air-Cooled blow-off line 2.Handover operation by valve, open 1/2/7/8 row Direct Air-Cooled condensate water and reclaim valve 22, close 1/2/7/8 row Direct Air-Cooled condensate water vent valves 23, close 3/4/5/6 row Direct Air-Cooled condensate water and reclaim valve 24, open 3/4/5/6 row Direct Air-Cooled condensate water vent valves 25.Like this, clean condensate water is disposed to cleaning sewage collecting box 18 by the defective condensate water that valve 22 is recycled to after steam exhaust device 3,3/4 row air cooling tubes condensers clean by valve 25 and cleaning discharge of wastewater temporary pipeline 17 in the 1/2 row air cooling tubes condenser.Have only the defective condensate water in the 3/4 row air cooling tubes condenser to be discharged in this stage, so the demineralized water rate of water make-up is constant, identical with the 1st day.
As shown in the table, progressively increase the steam total amount, be equipped with suitable valve operation, to finish the air cooling tubes condenser normal operation input of cleaning and reclaim qualified condensate water, choose unwashed air cooling tubes condenser successively and carry out hot cleaning and discharge underproof condensate water, finish until all air cooling tubes condensers cleanings.In the process that the hot cleaning of direct air cooling system is carried out, the generating capacity of unit progressively improves, and can also finish relevant experiment work the same period, has shortened the duration of hot cleaning of direct air cooling system and unit starting debugging effectively.
Embodiment 2
As shown in Figure 6 be the arrangement of existing another direct air cooling system, the condensate water of its 1/2/3/4/5/6/7/8 row air cooling tubes condenser is to be incorporated into a condensate water total pipeline 31, is recycled to steam exhaust device 3 by two condensate return pipe roads 9 again.At this direct air cooling system, existing hot cleaning device and method and shown in Figure 4 similar.
At direct air cooling system as shown in Figure 6, embodiments of the invention have increased by 5 valves as shown in Figure 7.Increased condensing water conduit isolating valve 26 in the centre of condensate water total pipeline, the condensate water of 8 row air cooling tubes condensers altogether is divided into preceding 4 row and back 4 row are reclaimed respectively, increase by 1/2/3/4 row Direct Air-Cooled condensate water and reclaim valve 27,1/2/3/4 row Direct Air-Cooled condensate water vent valves 28,5/6/7/8 row Direct Air-Cooled condensate water reclaims valve 29,5/6/7/8 row Direct Air-Cooled condensate water vent valves 30.Other pipeline and Unit Installation are arranged similar to Example 1, and be also similar to Example 1 at the valve operation of hot wash phase.
Above-described specific descriptions; purpose, technical scheme and beneficial effect to invention further describe; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. hot cleaning device of direct air cooling system, this device comprises at least:
The direct air cooling system steam exhaust device is connected with a plurality of air cooling tubes condensers by the Direct Air-Cooled blow-off line; A plurality of condensate return pipes road is with the corresponding connection of described a plurality of air cooling tubes condensers; Clean the discharge of wastewater temporary pipeline, link to each other, the waste water after cleaning is discharged with described a plurality of condensate return pipes road;
It is characterized in that described a plurality of condensate return pipes road links to each other with the steam exhaust device of direct air cooling system and the recovery valve is set between the two;
Between described a plurality of condensate return pipes road and cleaning discharge of wastewater temporary pipeline, vent valves is set.
2. device as claimed in claim 1 is characterized in that: described a plurality of air cooling tubes condenser groupings are provided with, and the every group of pairing condensate return pipe of air cooling tubes condenser road is connected with cleaning discharge of wastewater temporary pipeline with the steam exhaust device of direct air cooling system respectively.
3. hot cleaning method of direct air cooling system, this method may further comprise the steps:
A., the recovery valve is set between the steam exhaust device of a plurality of condensate return pipes road and direct air cooling system, between a plurality of condensate return pipes road and cleaning discharge of wastewater temporary pipeline, vent valves is set simultaneously;
B. air cooling tubes condenser is divided at least two groups, closes all steam distributing valve doors of direct air cooling system;
C. in unwashed air cooling tubes condenser, select one group, open pairing steam distributing valve door of this group air cooling tubes condenser and vent valves, close the recovery valve, steam is introduced direct air cooled condenser carry out hot cleaning, steam after the cleaning is cooled to condensate water, discharge by the vent valves of having opened on the pairing condensate return pipe of this group air cooling tubes condenser road, close this vent valves after water quality is qualified, open and reclaim valve, the condensate water that water quality is qualified reclaims and enters the steam exhaust device of direct air cooling system;
Repeating step C finishes until all air cooling tubes condensers cleanings.
4. method as claimed in claim 3, wherein, described steam is to provide by turbine by-pass pipeline or steam turbine.
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| CN2008101185476A CN101655335B (en) | 2008-08-19 | 2008-08-19 | Device and method for thermal cleaning of direct air cooling system |
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| CN101655335B true CN101655335B (en) | 2011-08-03 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102288064B (en) * | 2011-06-17 | 2013-06-12 | 河北省电力建设调整试验所 | Protection method for joint stop of air cooling island and unit |
| CN103776274A (en) * | 2013-12-31 | 2014-05-07 | 中国能源建设集团山西省电力勘测设计院 | Direct air cooling system thermal state washing waste water drain-off system |
| CN103954169A (en) * | 2014-04-29 | 2014-07-30 | 国家电网公司 | Method for washing air cooling island of first-startup unit in power plant |
| CN104976919B (en) * | 2015-07-12 | 2017-03-15 | 东北电力大学 | Dry and wet air cooled condenser cleaning system arranged side by side and its cleaning frequency determine method |
| CN113532188B (en) * | 2021-06-07 | 2022-07-22 | 国网河北省电力有限公司电力科学研究院 | Steam flow calculation method and device during hot flushing of air cooling island and terminal equipment |
| 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 |
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| CN101655335A (en) | 2010-02-24 |
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