CN203893703U - Evaporative cooler closed circulating cooling water device for thermal power plant - Google Patents

Evaporative cooler closed circulating cooling water device for thermal power plant Download PDF

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Publication number
CN203893703U
CN203893703U CN201420307690.0U CN201420307690U CN203893703U CN 203893703 U CN203893703 U CN 203893703U CN 201420307690 U CN201420307690 U CN 201420307690U CN 203893703 U CN203893703 U CN 203893703U
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China
Prior art keywords
devaporizer
water
power plant
thermal power
cooling
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CN201420307690.0U
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Chinese (zh)
Inventor
刘茂胜
马东
范晓英
刘峰
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Inner Mongol Jing Nengshengle Thermal Power Co Ltd
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Inner Mongol Jing Nengshengle Thermal Power Co Ltd
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Abstract

The utility model discloses an evaporative cooler closed circulating cooling water device for a thermal power plant. The evaporative cooler closed circulating cooling water device for the thermal power plant comprises a spraying pool and multiple evaporative coolers arranged at the top of the spraying pool side by side. A set of evaporative cooling pipes are arranged in each evaporative cooler. Water inlets and water outlet of the evaporative cooling pipes are communicated with hot water pipes of an auxiliary machine cooling device of the thermal power plant and cold water pipes of the auxiliary machine cooling device, wherein water flows from the hot water pipes to the cold water pipes, so that a closed circulation is formed. The bottom of each evaporative cooler is communicated with the spraying pool. Meanwhile, spraying devices are arranged in the evaporative coolers and communicated with the spraying pool through water pipes and spraying water pumps, so that the other circulation is formed. The tops of the evaporative coolers are provided with vapor output ports for outputting vapor generated by evaporation of water film layers formed on the surfaces of the evaporative cooling pipes through the spraying devices.

Description

For the devaporizer closed-type circulating cooling water device of thermal power plant
Technical field
The utility model relates to a kind of devaporizer closed-type circulating cooling water device for thermal power plant.
Background technology
At present there are two kinds for the recirculating cooling water system of thermal power plant subsidiary engine: the one, open and close type is in conjunction with cooling system, immediate boiling water is cooling by mechanical draft tower or cooling stack, enclosed water is cooling by opened water, the equipment high to water quality requirement adopts enclosed water cooling, and other adopt opened water cooling.As: feed pump oil cooler, water ring vacuum pump cooler, the hydrogen-cooled device of generator, main frame lube oil cooler, ash disposal air compressor cooling water, desulfurization cooling water etc. are cooling with opened water; The enclosed water cooling such as feed pump sealing cooling water, EH oil cooler cooling water, condensate pump cooling water, coal pulverizer cooling water, furnace side each blower fan petrol station cooling water; The 2nd, air-cooled large closed Water System, all subsidiary engines all adopt enclosed water cooling, and enclosed water is cooling by special indirect cooling tower.
Wherein open and close type in conjunction with cooling system be through subsidiary engine heat up after cooling water enter mechanical draft tower or cooling stack cooling, a cooled low-temperature cooling water part enters the cooling subsidiary engine cooling medium of the undemanding subsidiary engine cooler of water quality requirement; Another part enters the cooling enclosed cooling water of enclosed cooler, the enclosed cooling water being cooled enters the cooling subsidiary engine cooling medium of the tighter subsidiary engine cooler of water quality requirement again, it is cooling by opened water that the enclosed water that temperature raises is back to enclosed cooler again, the opened water that temperature raises is back to mechanical draft tower cooler again, so circular flow, as shown in Figure 1.But this open and close type has following problem in conjunction with cooling system:
1, opened water have CO2 to scatter and disappear and salt concentrated, easily produce fouling and etching problem.
If 2 surrounding environment are more severe, water can be heavily polluted, and cooler often occurs and stop up or etching problem.
3, factory building domestic demand is arranged enclosed cooling water pump and closed water cooler, and the outer subsidiary engine pump house of factory building is arranged subsidiary engine water circulating pump again, and system is more complicated, more crowded in factory building.
Although 4, circulating water quality requires highly, owing to directly contacting and still having corrosion with atmosphere, plate type heat exchanger is made up of plate, can not carry out preservative treatment, so plate type heat exchanger material is generally 316L or higher, one-time investment increases.And plate type heat exchanger needs often cleaning, has increased labour intensity, reduced impaired that the sheet material of safety coefficient, the often cleaning of equipment operation can be in various degree, has reduced the service life of cooler.
5, large, the elegant loss of water consumption is large: utilize water temperature to rise heat exchange, take away heat limited, a large amount of water of needs circulates, blowdown flow rate is large: high to water quality requirement for preventing plate type heat exchanger fouling or corrosion.
6, evaporation capacity is large: conduct heat little, air capacity is little, it is little that heat is taken away in air temperature rise, can only evaporation and heat-exchange.
Air-cooled large closed Water System is that the cooling water after subsidiary engine heats up enters indirect air cooling tower cooler, and a cooled low-temperature cooling water part enters the cooling subsidiary engine cooling medium of subsidiary engine cooler, and so circular flow as shown in Figure 2, exists
1, investment is large, floor space is large, cooling effect is relatively poor;
2, the cooling water of air cooling system does not directly contact with air, only has heat transfer, there is no the problems such as mass transfer.
Utility model content
The purpose of this utility model is to provide a kind of devaporizer closed-type circulating cooling water device for thermal power plant, and this equipment is a kind of energy-efficient cooling device that water-cooled and air cooling, heat and mass transfer process is combined together and have both length concurrently.
In the utility model, include a spray pond for the devaporizer closed-type circulating cooling water device of thermal power plant, several are set up in parallel the devaporizer at top, described spray pond, each devaporizer inside is provided with one group of evaporation-cooled tube, the water inlet of described evaporation-cooled tube and delivery port respectively with the hot-water line from subsidiary engine cooling device from thermal power plant, the cold water pipe that flows to subsidiary engine cooling device is communicated with, form the circulation of a sealing, the bottom of described each devaporizer is communicated with described spray pond, be provided with spray equipment in described devaporizer inside simultaneously, described spray equipment is through water pipe, feeding spraying pump is communicated with described spray pond, form another circulation, be provided with at the top of described each devaporizer for exporting the steam outlet of described spray equipment at the steam of the water film evaporation generation of described evaporative cooling tube-surface formation.
Described devaporizer includes the housing of a sealing, is provided with the through hole that multiple and described spray pond is communicated with in the bottom of described housing.
Described evaporation-cooled tube is spiral is arranged on described enclosure interior.
Described spray equipment includes the spray piping that is positioned at described evaporation-cooled tube top, and several spray heads are installed on described spray piping.
The cross current of described spray head outside described spray piping and described devaporizer, and further after water filter, feeding spraying pump, be communicated with the bottom in described spray pond.
Described enclosure interior be positioned at described spray equipment above be provided with the air-introduced machine for aspirating steam.
The heat output of the devaporizer in the utility model is the function of air ' s wet bulb temperature, and the heat output of currently used air cooled condenser is the function of dry-bulb temperature, because wet-bulb temperature is conventionally low than dry-bulb temperature, the heat transfer coefficient that adds the metal wall of water film and evaporation-cooled tube is greater than local decompression's effect that blower fan produces, therefore use the condensation temperature of the devaporizer in the utility model far below air cooling system, there is cooling water clean, greatly reduce the advantage of cooler obstruction and corrosion rate, there is operation more flexible simultaneously, invest lower, the advantages such as floor space is less.
Brief description of the drawings
Fig. 1 is the schematic diagram of current open and close type in conjunction with cooling system.
Fig. 2 is the schematic diagram of current air-cooled large closed Water System.
Fig. 3 is the structural representation for the devaporizer closed-type circulating cooling water device of thermal power plant in the utility model.
Fig. 4 is the structural representation of devaporizer in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the utility model is elaborated.
As shown in Figure 3, in the utility model, include a spray pond 2 for the devaporizer closed-type circulating cooling water device of thermal power plant, five devaporizers 1 that are set up in parallel at spray 2 tops, pond, the water inlet of the evaporation-cooled tube 10 of each devaporizer 1 inside and delivery port are communicated with from the hot-water line 3 of subsidiary engine cooling device, the cold water pipe 4 that flows to subsidiary engine cooling device respectively with from thermal power plant, form the circulation of a sealing.The quantity of devaporizer 1 can decide according to the power of power station auxiliary, might not be five.
As shown in Figure 4, each devaporizer 1 includes the housing 11 of a sealing, be provided with multiple through hole (not shown)s that are communicated with spray pond 2 in the bottom of housing 11, top is provided with a steam outlet 12, be provided with one group in housing 11 inside and coil in the shape of a spiral the evaporation of metal cooling tube 10 of establishing, the top that is positioned at evaporation-cooled tube 10 is fixedly installed spray equipment, this spray equipment includes the spray piping 5 being connected to outside housing 11, several spray heads 9 are installed on each spray piping, spray head 9 is communicated with the water pipe 6 outside devaporizer 1 through spray piping 5, and be further communicated with water filter 7, water filter 7 is communicated with the bottom in spray pond 2 after feeding spraying pump 8.Housing 11 inside be positioned at spray piping 5 above be provided with air-introduced machine 13, for aspirating steam or hot-air.The spraying cooling water of spray in pond 2 delivered to the spray piping 5 of devaporizer 1 inner and upper after the boosting of feeding spraying pump 8, spray uniformly evaporation-cooled tube 10 surfaces of devaporizer 1 inside through spray head 9, surface at evaporation-cooled tube 10 forms thinner moisture film sulfate layer flows downhill, hot water in evaporation-cooled tube 10 carries out heat exchange by the water film outside tube wall and tube wall and air, water film forms steam in carrying out heat exchange owing to being heated, under the effect of air-introduced machine 13, export through steam outlet 12, take away heat.
A side in spray pond 2 is provided with filling pipe and drainpipe, carries out moisturizing and cleaning for spraying pond 2.
Devaporizer 1 in the utility model utilizes " shower water " evaporation to absorb the latent heat that discharges of evaporation-cooled tube 10 and the water temperature in devaporizer 1 is reduced, and unevaporated shower water flows downward through chilled air cools, and temperature reduces, and enters spray pond 2.Its concrete operation principle is by devaporizer 1, heat to be passed to its inner evaporation-cooled tube 10 from the cooling medium of power station auxiliary, heat is reached water film by tube wall by evaporation-cooled tube 10, the rapid evaporator strip of water film is walked heat, the humid air of evaporation is taken away by the air-introduced machine 13 of top, and undertaken coolingly below by the new air of coming in again, circulate with this.Spray water in pond 2 the is sprayed onto evaporation-cooled tube 10 surface cool evaporation-cooled tube 10 interior conveyings cooling medium from power station auxiliary by spray pump 8, spray head 9 simultaneously.Utilize two kinds of modes of air cooling and water-cooled to carry out cooling simultaneously.
The heat output of devaporizer 1 is the function of air ' s wet bulb temperature, and the heat output of air cooled condenser is the function of dry-bulb temperature, because wet-bulb temperature is conventionally low than dry-bulb temperature, the heat transfer coefficient that adds water film and metal wall is greater than local decompression's effect that blower fan produces, and therefore uses the condensation temperature of devaporizer far below air cooling system.Thereby the cooling water equipment in can the utility model stops below devaporizer 1 20 DEG C of environment temperatures and sprays water, be 20 DEG C of following water in spray pond 2 can being bled off of environment temperature, stop water cooling, only carrying out heat exchange by air just can reach cooling object.
In sum, due to vaporation-type condenser under the effect of blower fan local decompression with relatively low equilibrium temperature generation evaporation and heat-exchange, partial pressure of water vapor reduces, evaporating temperature is low, and the corresponding increase of the latent heat of vaporization of water, therefore evaporation of water amount obviously reduces.Cooling water is clean simultaneously, greatly reduce cooler and stop up and corrosion rate, and operation is flexible, investment is lower, floor space is less.
Different subsidiary engine cooling schemes are comprehensively had to following effect more afterwards:
(1) although the coolant-temperature gage that open and close type goes out in conjunction with cooling system mechanical draft tower is lower, but can not ensure under the condition of tower surrounding environment, adopt this system, may cause cooler in unit operation to stop up, frequent clean coolers, not only increase attendant's workload, the problem that cooler damages also may occur.
(2) though air-cooled large closed Water System using water wisely, the good advantage of quality of cooling water, one-time investment and annual total cost are higher, and floor space is larger.
(3) devaporizer closed-type circulating cooling water device one-time investment and the open and close type coupling system in the utility model is more or less the same, and year water consumption is saved over half than the clammy scheme of open and close type coupling system.

Claims (6)

1. the devaporizer closed-type circulating cooling water device for thermal power plant, it is characterized in that, it includes a spray pond, several are set up in parallel the devaporizer at top, described spray pond, each devaporizer inside is provided with one group of evaporation-cooled tube, the water inlet of described evaporation-cooled tube and delivery port respectively with the hot-water line from subsidiary engine cooling device from thermal power plant, the cold water pipe that flows to subsidiary engine cooling device is communicated with, form the circulation of a sealing, the bottom of described each devaporizer is communicated with described spray pond, be provided with spray equipment in described devaporizer inside simultaneously, described spray equipment is through water pipe, feeding spraying pump is communicated with described spray pond, form another circulation, be provided with at the top of described each devaporizer for exporting the steam outlet of described spray equipment at the steam of the water film evaporation generation of described evaporative cooling tube-surface formation.
2. the devaporizer closed-type circulating cooling water device for thermal power plant according to claim 1, is characterized in that, described devaporizer includes the housing of a sealing, is provided with the through hole that multiple and described spray pond is communicated with in the bottom of described housing.
3. the devaporizer closed-type circulating cooling water device for thermal power plant according to claim 2, is characterized in that, described evaporation-cooled tube is spiral is arranged on described enclosure interior.
4. the devaporizer closed-type circulating cooling water device for thermal power plant according to claim 2, is characterized in that, described spray equipment includes the spray piping that is positioned at described evaporation-cooled tube top, and several spray heads are installed on described spray piping.
5. the devaporizer closed-type circulating cooling water device for thermal power plant according to claim 4, it is characterized in that, the cross current of described spray head outside described spray piping and described devaporizer, and further after water filter, feeding spraying pump, be communicated with the bottom in described spray pond.
6. the devaporizer closed-type circulating cooling water device for thermal power plant according to claim 2, is characterized in that, described enclosure interior be positioned at described spray equipment above be provided with the air-introduced machine for aspirating steam.
CN201420307690.0U 2014-06-11 2014-06-11 Evaporative cooler closed circulating cooling water device for thermal power plant Active CN203893703U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107850335A (en) * 2015-05-15 2018-03-27 北狄空气应对加拿大公司 Liquid cooling is carried out using liquid-gas type film energy exchanger
US10584884B2 (en) 2013-03-15 2020-03-10 Nortek Air Solutions Canada, Inc. Control system and method for a liquid desiccant air delivery system
US10712024B2 (en) 2014-08-19 2020-07-14 Nortek Air Solutions Canada, Inc. Liquid to air membrane energy exchangers
US10808951B2 (en) 2015-05-15 2020-10-20 Nortek Air Solutions Canada, Inc. Systems and methods for providing cooling to a heat load
US10928082B2 (en) 2011-09-02 2021-02-23 Nortek Air Solutions Canada, Inc. Energy exchange system for conditioning air in an enclosed structure
US11035618B2 (en) 2012-08-24 2021-06-15 Nortek Air Solutions Canada, Inc. Liquid panel assembly
US11092349B2 (en) 2015-05-15 2021-08-17 Nortek Air Solutions Canada, Inc. Systems and methods for providing cooling to a heat load
US11300364B2 (en) 2013-03-14 2022-04-12 Nortek Air Solutions Canada, Ine. Membrane-integrated energy exchange assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10928082B2 (en) 2011-09-02 2021-02-23 Nortek Air Solutions Canada, Inc. Energy exchange system for conditioning air in an enclosed structure
US11035618B2 (en) 2012-08-24 2021-06-15 Nortek Air Solutions Canada, Inc. Liquid panel assembly
US11300364B2 (en) 2013-03-14 2022-04-12 Nortek Air Solutions Canada, Ine. Membrane-integrated energy exchange assembly
US10584884B2 (en) 2013-03-15 2020-03-10 Nortek Air Solutions Canada, Inc. Control system and method for a liquid desiccant air delivery system
US10712024B2 (en) 2014-08-19 2020-07-14 Nortek Air Solutions Canada, Inc. Liquid to air membrane energy exchangers
CN107850335A (en) * 2015-05-15 2018-03-27 北狄空气应对加拿大公司 Liquid cooling is carried out using liquid-gas type film energy exchanger
US10782045B2 (en) 2015-05-15 2020-09-22 Nortek Air Solutions Canada, Inc. Systems and methods for managing conditions in enclosed space
US10808951B2 (en) 2015-05-15 2020-10-20 Nortek Air Solutions Canada, Inc. Systems and methods for providing cooling to a heat load
US11092349B2 (en) 2015-05-15 2021-08-17 Nortek Air Solutions Canada, Inc. Systems and methods for providing cooling to a heat load
US11143430B2 (en) 2015-05-15 2021-10-12 Nortek Air Solutions Canada, Inc. Using liquid to air membrane energy exchanger for liquid cooling

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