CN204255125U - A kind of thermal power plant Direct Air-Cooled assists spike cooling system - Google Patents

A kind of thermal power plant Direct Air-Cooled assists spike cooling system Download PDF

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Publication number
CN204255125U
CN204255125U CN201420716490.0U CN201420716490U CN204255125U CN 204255125 U CN204255125 U CN 204255125U CN 201420716490 U CN201420716490 U CN 201420716490U CN 204255125 U CN204255125 U CN 204255125U
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China
Prior art keywords
air
cooling
power plant
thermal power
subsidiary engine
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Expired - Fee Related
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CN201420716490.0U
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Chinese (zh)
Inventor
许旺发
林东杰
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FUJIAN LIXIN HEAT EXCHANGE EQUIPMENT MANUFACTURING Co Ltd
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FUJIAN LIXIN HEAT EXCHANGE EQUIPMENT MANUFACTURING Co Ltd
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Abstract

That a kind of thermal power plant Direct Air-Cooled assists spike cooling system disclosed in the utility model, comprise steam turbine, Air-Cooling Island, described steam turbine is communicated with described Air-Cooling Island by a female pipeline, also comprise a condenser and branch pipe(tube), one end of this branch pipe(tube) is connected in parallel on described female pipeline, the other end is connected with described condenser, and the both sides of described condenser have been arranged in parallel a set of heating system and a set of dry wet combination air cooler system respectively; Described dry wet combination air cooler system is also connected with a set of little machine and subsidiary engine circulation.The utility model not only has the water saving feature of the pure Air-Cooling Island technology of thermal power plant, have more the energy-efficient of vaporation-type cooling technology, and native system also solves the problem of exhaust steam in steam turbine heat recovery, abundant integration various excavating resource UTILIZATION OF VESIDUAL HEAT IN potentiality, make it to reach the object reducing coal consumption, improve unit efficiency, save water consumption, the production application of the industry is had very important significance.

Description

A kind of thermal power plant Direct Air-Cooled assists spike cooling system
Technical field
The utility model relates to the cooling technology field of thermal power station condensing turbine steam discharge, is more particularly that a kind of thermal power plant Direct Air-Cooled assists spike cooling system.
Background technology
The basic circulation of Steam Power Equipment is Rankine cycle, and the working medium of this circulation is water vapour, and water is first heated to form saturated vapor, then continues to be heated to be superheated steam through superheater, and this process is level pressure endothermic process.Superheated steam introduces expansion work in steam turbine, and this acting process is generally considered as adiabatic expansion.The exhaust steam finishing merit in steam turbine enters in condensing equipment, and the cooled releasing latent heat of condensation in condensing equipment also condenses into water, and this process is level pressure exothermic process.Steam discharge to be condensed into after condensate water by Steam Turbine Regenerative System preheating, again enters boiler, starts the next power cycle of steam.For ensureing that working medium must have a cold junction device playing Cold source in the condensing equipment heat that presses decided at the higher level but not officially announced.In the thermodynamic cycle of modern large-scale power station condensing turbine group, this cold junction device is generally made up of with the cooling system can taking away the steam discharge latent heat of condensation in time the condensing equipment of level pressure heat release under vacuum conditions, and the quality of its service behaviour directly affects heat-economy and the security of whole unit.
Different according to cooling system cooling medium, current condensing equipment cooling means mainly contains two kinds: clammy and air cooling.The so-called clammy steam condensation latent heat namely taken away with recirculated cooling water in condensing equipment, directly to contact with air in " drenching with rain " mode at cooling tower Inner eycle water and carry out heat exchange, its whole process is in the state of " wetting ", and therefore its cooling system is called humid-cool system.This type of cooling of the many employings of current conventional power plant.Clammy technical development comparative maturity, heat-economy is relatively good, but from equipment water consumption, condensing equipment water consumption accounts for greatly 42.8% ~ 79.5% of power plant's total water consumption, this is for the power plant being positioned at water-deficient area, will become a very serious problem.
The huge water resource loss of relative humid-cool system, the few air cooling system of water consumption obtains to be paid attention to and development more and more widely.Air cooling system also claims dry cooling-system, relative humid-cool system, and it is the general designation utilizing air directly or indirectly to cool the complete combination such as the necessary unit of turbine discharge and annex thereof.The air cooling tower in air cooling power plant, its recirculated water and air carry out heat exchange indirectly by radiator, the state that whole cooling procedure is in " doing ", so air cooling tower is also called dry cooling tower or dry and cold tower.The difference of heat exchange method is carried out according to air and steam discharge, air cooling system is divided into: direct air cooling system, adopt the indirect air cooling system (i.e. Harmon formula) of surface-type condensing equipment, adopt the indirect air cooling system (i.e. Hai Leshi) of hybrid condensing equipment.With the Air-cooled Unit of capacity compared with wet type cooling unit, its cooling system itself can economize on water more than 97%, and whole plant water saving about more than 65% is the technology that thermal power plant's water-saving amount is maximum.But, ratio of specific heat due to air self holds little feature, cause the problems such as air cooling back pressure in summer is high, energy consumption is large, efficiency is low particularly outstanding, even if summer this area's temperature lower, result of use is still difficult to satisfactory, do not solve air cooling spike in summer cooling problem, the advantage of pure air cooling is by blemish in an otherwise perfect thing.
On the other hand, thermal power plant adopts absorption heat pump to extract exhaust steam in steam turbine waste heat to carry out heating, but due to winter heating season shorter, summer, heat pump left unused, heat pump installations is not fully utilized, also the little machine of some thermal power plant and auxiliary machine circulating cooling water adopt open cooling tower to cool, although good cooling results, water consumption is large, for water-deficient area, heavyly undoubtedly increase operating cost, winter temperature is low simultaneously, does not give full play to the advantage with stronger cooling effect that temperature is low.
So design one namely can solve air cooling spike in summer cooling problem, cooling system tool in the industry of water consumption of can excavating UTILIZATION OF VESIDUAL HEAT IN potentiality again, reach reduction coal consumption, improve unit efficiency, save is of great significance.
Utility model content
The utility model discloses a kind of thermal power plant Direct Air-Cooled and assist spike cooling system, its main purpose is to overcome prior art above shortcomings and shortcoming.
The technical solution adopted in the utility model is as follows:
A kind of thermal power plant Direct Air-Cooled assists spike cooling system, comprise steam turbine, Air-Cooling Island, described steam turbine is communicated with described Air-Cooling Island by a female pipeline, also comprise a condenser and branch pipe(tube), one end of this branch pipe(tube) is connected in parallel on described female pipeline, the other end is connected with described condenser, and the both sides of described condenser have been arranged in parallel a set of heating system and a set of dry wet combination air cooler system respectively; Described dry wet combination air cooler system is also connected with a set of little machine and subsidiary engine circulation.
Further, described condenser is any one in the condensing equipment of absorption heat pump, plate evaporation air cooling tubes condenser, high back pressure heating system or other arbitrary forms.
Further, described little machine and subsidiary engine circulation comprise that little machine subsidiary engine recirculated water supplies water, little machine subsidiary engine recirculated water backwater, circulating pump and cooling tower, and this circulating pump is arranged on described little machine subsidiary engine recirculated water for waterborne.
Further, described little machine subsidiary engine recirculated water water supply and little machine subsidiary engine recirculated water backwater are connected with described dry wet combination air cooler system respectively.
By above-mentioned known to description of the present utility model, compared to the prior art, the utility model has the advantage of: native system not only has the water saving feature of the pure Air-Cooling Island technology of thermal power plant, have more the energy-efficient of vaporation-type cooling technology, and native system also solves the problem of exhaust steam in steam turbine heat recovery, abundant integration various excavating resource UTILIZATION OF VESIDUAL HEAT IN potentiality, make it to reach the object reducing coal consumption, improve unit efficiency, save water consumption, the production application of the industry is had very important significance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
A kind of thermal power plant Direct Air-Cooled assists spike cooling system, comprise steam turbine 1, Air-Cooling Island 2, described steam turbine 1 is communicated with described Air-Cooling Island 2 by a female pipeline 3, also comprise a condenser 4 and branch pipe(tube) 5, one end of this branch pipe(tube) 5 is connected in parallel on described female pipeline 3, the other end is connected with described condenser 4, and the both sides of described condenser 4 have been arranged in parallel a set of heating system 6 and a set of dry wet combination air cooler system 7 respectively.Wherein, described condenser 3 is any one in the condensing equipment of absorption heat pump, plate evaporation air cooling tubes condenser, high back pressure heating system or other arbitrary forms, can select according to practical condition.
As shown in Figure 1, this dry wet combination air cooler system 7 is also connected with a set of little machine and subsidiary engine circulation 8, this little machine and subsidiary engine circulation 8 comprise that little machine subsidiary engine recirculated water supplies water 81, little machine subsidiary engine recirculated water returns 82 water, circulating pump 83 and cooling tower 84, this circulating pump 83 is arranged in described little machine subsidiary engine recirculated water water supply 81, and little machine subsidiary engine recirculated water water supply 81 and little machine subsidiary engine recirculated water backwater 82 are connected with described dry wet combination air cooler system 7 respectively.
With reference to Fig. 1, operation principle of the present utility model: before exhaust steam in steam turbine enters Air-Cooling Island, a road branch pipe(tube) is drawn from the female pipeline of exhaust steam, extract a certain amount of exhaust steam and enter condenser, the condensation side of condenser is arranged in parallel a set of heating system and a set of dry wet combination air cooler system, during winter, by the valve closing of condenser cold side, condenser is utilized to extract waste heat for heating system, summer is by the valve closing of condenser heating side, open dry wet combination air cooler system, cool as assisting spike summer, thus avoid the idle waste of condenser non-heating season.Simultaneously, dry wet combination air cooler system is incorporated to little machine and subsidiary engine circulating water cooling system simultaneously, when Heating Season, close cooling stack valve, recirculated water enters dry wet combination air cooler and carries out circulating cooling, both avoid the idle waste of dry wet combination air cooler, and the most important thing is also to have played the low cooling advantage of winter air temperature, reduce water consumption.
Above are only detailed description of the invention of the present utility model, but design concept of the present utility model be not only confined to this, everyly utilize this design to improve with carrying out unsubstantiality the utility model, all should belong to the behavior of infringement the utility model protection domain.

Claims (4)

1. thermal power plant's Direct Air-Cooled assists spike cooling system, comprise steam turbine, Air-Cooling Island, described steam turbine is communicated with described Air-Cooling Island by a female pipeline, it is characterized in that: also comprise a condenser and branch pipe(tube), one end of this branch pipe(tube) is connected in parallel on described female pipeline, the other end is connected with described condenser, and the both sides of described condenser have been arranged in parallel a set of heating system and a set of dry wet combination air cooler system respectively; Described dry wet combination air cooler system is also connected with a set of little machine and subsidiary engine circulation.
2. a kind of thermal power plant according to claim 1 Direct Air-Cooled assists spike cooling system, it is characterized in that: described condenser is any one in absorption heat pump, plate evaporation air cooling tubes condenser, high back pressure heating system.
3. a kind of thermal power plant according to claim 1 Direct Air-Cooled assists spike cooling system, it is characterized in that: described little machine and subsidiary engine circulation comprise that little machine subsidiary engine recirculated water supplies water, little machine subsidiary engine recirculated water backwater, circulating pump and cooling tower, this circulating pump is arranged on described little machine subsidiary engine recirculated water for waterborne.
4. a kind of thermal power plant according to claim 1 Direct Air-Cooled assists spike cooling system, it is characterized in that: described little machine subsidiary engine recirculated water water supply and little machine subsidiary engine recirculated water backwater are connected with described dry wet combination air cooler system respectively.
CN201420716490.0U 2014-11-26 2014-11-26 A kind of thermal power plant Direct Air-Cooled assists spike cooling system Expired - Fee Related CN204255125U (en)

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CN201420716490.0U CN204255125U (en) 2014-11-26 2014-11-26 A kind of thermal power plant Direct Air-Cooled assists spike cooling system

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CN201420716490.0U CN204255125U (en) 2014-11-26 2014-11-26 A kind of thermal power plant Direct Air-Cooled assists spike cooling system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104964577A (en) * 2015-06-30 2015-10-07 国网山东省电力公司电力科学研究院 Auxiliary cooling device applied in direct air cooling system and control method thereof
CN111854462A (en) * 2020-08-03 2020-10-30 西安热工研究院有限公司 Full-working-condition cooling and anti-freezing system suitable for indirect air cooling heat supply unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104964577A (en) * 2015-06-30 2015-10-07 国网山东省电力公司电力科学研究院 Auxiliary cooling device applied in direct air cooling system and control method thereof
CN111854462A (en) * 2020-08-03 2020-10-30 西安热工研究院有限公司 Full-working-condition cooling and anti-freezing system suitable for indirect air cooling heat supply unit

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150408

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CF01 Termination of patent right due to non-payment of annual fee