CN102466416A - Cooling tower temperature regulation and control method - Google Patents
Cooling tower temperature regulation and control method Download PDFInfo
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- CN102466416A CN102466416A CN2011104247391A CN201110424739A CN102466416A CN 102466416 A CN102466416 A CN 102466416A CN 2011104247391 A CN2011104247391 A CN 2011104247391A CN 201110424739 A CN201110424739 A CN 201110424739A CN 102466416 A CN102466416 A CN 102466416A
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- temperature
- air inlet
- cooling
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- 238000001816 cooling Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 130
- 238000003860 storage Methods 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000005057 refrigeration Methods 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 230000002528 anti-freeze Effects 0.000 claims description 4
- 238000002663 nebulization Methods 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 15
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000009746 freeze damage Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The invention discloses a method for regulating and controlling the temperature of a cooling tower, which is characterized in that a circle of water pipelines are respectively arranged at the inner side and the outer side of an air inlet of the cooling tower, nozzles are arranged on the water pipelines, and the inner space and the outer space around the air inlet form an air cooling area through low-temperature spraying in summer, so that the temperature of higher air wet bulb temperature is reduced after passing through the cooling area. The condensed water sprayed out from the nozzle is supplied to a water circulation pipeline by a water pump after being secondarily condensed by a refrigerating device, distributed to each branch pipeline and finally sprayed out by the nozzle. The inner side of the air inlet of the cooling tower is vertically suspended to the water surface of the water storage tank from top to bottom by a row of metal wires which are arranged in parallel, the periphery of the air inlet of the cooling tower is blocked, the bottom of the air inlet of the cooling tower is connected into a whole by a steel pipe, and the steel pipe is provided with a deicer. The invention has simple structure, can preserve heat and cool, is safe, efficient, flexible and practical, is naturally integrated, can automatically adjust the air intake of the air inlet, and controls the cooling water in the optimal temperature range.
Description
One, technical field
The present invention relates to power plant's cooling tower, particularly about eliminating freeze injury in cooling stack cooling in summer, winter and reducing the serial of methods of discharging.
Two, background technology
Cooling tower is a heat and mass equipment important in the power plant production power generation process, and its effect is through caloic exchange, and the heat of high-temperature cooling water is spilt in the atmosphere, and the temperature of recirculated cooling water is reduced.Its cooling water effect mainly leans on cold and hot two fluid streams in tower, to mix contact, and is poor by the partial pressure of water vapor between two fluid streams, hot fluid partly evaporated also self cool off.
The composition of hyperbolic natural-draft cooling tower can be divided into tower barrel structure and liquid distribution two large divisions.The tower barrel structure comprises cooling tower storage cistern, inclined strut (cooling tower air inlet), ventilator etc.; Liquid distribution comprises sparge pipe and distribution channel, spraying and splashing facility, packing, dehydrater etc.
Can cooling tower summer intact work be the necessary condition of generating at full capacity and safe power generation, has only cooling tower that enough cooling effects are arranged, and to the condenser of Turbo-generator Set enough cooling waters is provided, and could guarantee the vacuum of condenser.The temperature of cooling water is lower, and equivalent steam institute work is bigger, and its effective rate of utilization is also just high.Can cooling tower reach due efficient is the essential condition that can generating economize coal, power saving, energy savings, reduction cost of electricity-generating.
The water distribution system of cooling tower is: the inlet water of cooling tower is through the pressure pipeline vertical shaft of flowing through; Branch to each distribution channel; It is unrestrained to packing to form the uniform globule through spraying and splashing facility again; The effect of packing is to make the hot water that gets into cooling tower form tiny water droplet or thin moisture film as much as possible, to increase the contact area and the time of contact of water and air, helps the caloic exchange of water and air.
The variation of the cooling water temperature of cooling tower relies on natural temperature, wind speed, atmospheric pressure to determine fully; Actual temperature and the optimum temperature of design of cooling water differ bigger in summer; Want to change the status quo; Need two conditions: 1, around the cooling tower air inlet the lower cold air source of wet-bulb temperature, i.e. air coolant will be arranged; 2, to increase the intake of cooling tower air inlet.
After north China got into winter, environment temperature can be reduced to subzero 10～30 ℃, causes the recirculated water sub-cooled, caused cooling tower water distribution system, water spray system and filler device to freeze and damaged.For preventing the seriously icing damage equipment of cooling tower sub-cooled that circulates; The cooling tower air inlet place of most of unit all adopts the mode of suspension deep bead to stop cold air; To reduce the intake that gets into cooling tower; Thereby control circulation cooling tower and auxiliary device thereof do not freeze, and reach the purpose of protection equipment.The rule that winter temperature changes is that high night in daytime is low, causes the unit vacuum to present high trend at low night in daytime, with the unit load variation tendency---and the direction contrary that high night in daytime is low.Safety for the cooling tower antifreezing of guaranteeing to circulate; Suspension deep bead quantity should satisfy minimum, the safe operation needs when the unit vacuum values is the highest of load valley (period after midnight) environment temperature, and along with environment temperature is gone up, the unit load rate raises gradually; The unit vacuum values also reduces gradually; Cause most of period circulating water temperature to be higher than optimum temperature, cause the unit vacuum to be lower than design load, be unfavorable for the economical operation of unit.Because the work of suspension deep bead receives the influence of weather condition, wind direction, wind scale bigger, can't reach the requirement of adjusting at any time according to the variation of environment temperature, circulating water temperature.
In recent years in fact the fast spraying freezing coldproof method that adopts has substituted deep bead, and coolant water temperature is controlled in a period of time, but because after wire netting freezes; The ice film that forms is a hole, in the process of dissolving, dissolves inequality; The subregion forms no hole ice face, and after after a while, the ice face freezes thicker and thicker; Form the ice wall, lost the function of original design adjustment air quantity.When natural temperature raise, that joins together had a landing from the top down of certain thickness ice body, pounds the lower end at wire netting, causes wire netting partly to come off, and bigger ice cube scatters on ground, was difficult to again winter recover.
Recirculated water carries out heat exchange with the dual mode and the air that conduct heat and evaporate in cooling tower.The promptly direct heat transferred air with recirculated water that conducts heat raises its temperature; And evaporation be through recirculated water to air evaporation, air humidity is increased, be called the latent heat transfer mode.Because the temperature of air in cooling tower raises and the evaporation saturation pressure increases with its increase in temperature, and the cooling tower outlet is saturated moist air, thus latent heat to account for the share that total amount of heat transmits quite big.The cooling tower of the conventional humid-cool system that generally adopts is at present discharged a large amount of used heat through evaporation to environment in cooling circulating water, this heat exchange mode causes a large amount of evaporated water losses.
Three, summary of the invention
The purpose of this invention is to provide a kind ofly can increase the air inlet intake in summer, changes the method for cooling tower air inlet wet-bulb temperature, to reduce the temperature of cooling water, improves the cooling tower operating efficiency, reaches energy-saving and cost-reducing; Can control the intake of cooling tower air inlet in the winter time automatically, adjust the temperature in liquid distribution zone, satisfy the optimum temperature of cooling water needs.No matter how natural temperature changes, guarantee under the non-icing situation in cold snap trickle zone, round the clock cooling water temperature change be controlled at ± 1 ℃ in, eliminate the cooling tower freeze injury, realize the operation automation.
The technical scheme that the present invention adopts is: in the inside and outside both sides of cooling tower air inlet one all water lines are set respectively; Nozzle is installed on water lines; Pass through cold nebulization summer; Inside and outside space forms air cooling zone around making air inlet, and higher air ' s wet bulb temperature is being reduced through temperature behind the cooled region.The condensed water of nozzle ejection is by the cooling tower raw make up water source, behind the refrigeration plant time condensation, offers all water lines by water pump and is assigned to each branch line after the nozzle ejection.The cryogenic condensation water coverage rate of ejection reaches more than 90% of cooling tower air-admitting surface; Condensed water is after the drive nozzle ejection; Existing certain flow velocity gives out a large amount of cold air again, with between natural air themperature and the wet-bulb temperature in the cooling tower bigger temperature difference being arranged.
Inboard at the cooling tower air inlet, with row's wire vertical hanging to storage cistern water surface from top to bottom, wire is parallel to be arranged in juxtaposition, and to keeping off around the cooling tower air inlet one, the bottom fuses with steel pipe, and ice removal is housed on steel pipe.One all water lines of cooling tower air inlet arranged outside are the multilayer water lines, and each layer water lines connects the water main road through water knockout drum, and the water main road is connected to water pump, and passes in the tower basin storage cistern.Nozzle on one all water lines branch lines is antifreeze (operating) water nozzle.
The start and stop of water pump are to be determined by the temperature of cooling water, and the control device of starting mode of pump comprises temperature sensor, intelligent temperature controller, the time relay and is connected the A.C. contactor on the pump motor loop.Detect the water temperature in the storage cistern through sensor, and preestablish the upper and lower bound of water temperature.Be lower than down in limited time, the temperature controller instruction, time relay timing, the power supply of connecting pump motor through A.C. contactor makes pump working; Prescribe a time limit when water temperature raises or reaches, water pump cuts out automatically, quits work, and temperature controller starts and the power supply that switches off the pump according to range of set temperature; Be that it can control the start and stop water spray according to variation of temperature, during starting mode of pump, nozzle is sprayed water on wire; The water of ejection nebulizes, and water smoke contacts with wire, promptly freezes fast; Wire is by thin chap, forms the icicle of semicircle, and is outer thin in thick.The icicle of semicircle is in turn connected into has the awave ice wall of outward appearance, and the enclosing of ice wall reduces intake, and the trickle regional temperature raises; Along with the variation of temperature and thermic load, the icicle on the wire can slowly dissolve from the icicle outer fix, and the slit is widened, and intake increases.Prescribe a time limit when water temperature raises, surpasses going up of setting rapidly, ice removal starts automatically all to be removed the icicle on the wire, falls in the storage cistern, dissolves in water.The following water pump in limited time that drops to setting when the temperature of cooling water is restarted circulation and is regulated.The present invention is simple in structure, can be incubated, can lower the temperature, and safe and efficient, flexible practicality and combines together naturally, can regulate the intake of air inlet automatically, and cooling water control is in the best temperature scope.
Four, description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the vertical view of Fig. 1.
Five, the specific embodiment
Installation one all water lines 2 are set respectively in the inside and outside both sides of cooling tower air inlet of ventilator 1 bottom; Be distributed with nozzle 3 on the branch line of one all water lines 2; Inboard all water lines are connected the water main road through water knockout drum 5,6 respectively with the outside one all water lines; The water main road is connected in the storage cistern through water pump 9, and all water lines 2 in the cooling tower air inlet outside are fixing by pillar 19.Water pump 9 is a deep well submerged pump, is placed on to replenish in the water source channel 10.The condensed water of nozzle 3 ejection is that the condensed water by refrigeration plant 12 reducing temperature twices provides.Refrigeration plant 12 adopts HBW-50 (D) refrigeration plant.In the inboard all storage cisterns of cooling tower air inlet, establish divider wall 8, condensed water and cooling water are isolated.
In the cooling tower air inlet, liquid distribution lower outer space mounting has wind-driven generator 7 (model HXWP2000W); In the outlet of cooling tower storage cistern hydroelectric generator 4 (model SF320-12/990) is installed.The convection current of cold and heat air makes cooling tower air inlet wind increases on every side, and wind speed strengthens, and wind promotes the air vane rotation, is electric energy by wind energy transformation, for refrigeration plant provides electrical source of power, for additional water source time condensation circulates necessary condition is provided.
Above ventilator 1 inner spraying and splashing facility, be provided with condensate line 16 in the tower, on condensate line 16, be distributed with spray nozzle 17; Above condensate line 16, be provided with metal silk condenser 18; Condensate line 16 connects the water main road through spray main line 15, refrigeration pipe 11, refrigeration plant 12.The present invention substitutes condensing agent with condensed water, reduces the temperature of metal silk condenser 18, thereby reduces cooling tower water evaporation loss; To realize the cooling tower water saving, to reduce evaporating loss; A certain height in cooling Tata tube is installed condensate line 16 and spray nozzle 17, with 0～15 ℃ of condensed water ejection that is lower than damp-heat air; The condensed water of ejection contact with the hot water of cooling procedure, only with the damp-heat air of rising in water vapour contact and carry out condensation process.The water vapour rising is met condensation and is formed water droplet, and flowing each other of cold and heat air can produce clocklike stronger wind-force again, and the natural draft of tower tube is strengthened.
Certain altitude above cooling tower internal spraying mouth 17 is equipped with the metal silk condenser 18 that equates with cooling tower trickle area, and its effect is that damp-heat air and fine liquid particles are formed water droplet through metal silk condenser 18; Metal silk condenser 18 is by condensed water low-temperature receiver to be provided, and protects condenser forever and is in low-temperature condition, and damp and hot waste gas and tiny water droplet rising can be met the cold direction that repeatedly changes; Be attached on the metal silk condenser 18; Form bigger water droplet, fall into the below, get into storage cistern.
Claims (6)
1. cooling tower temperature adjusting method; It is characterized in that: all water lines (2) are set respectively in the inside and outside both sides of cooling tower air inlet; Nozzle (3) is installed on the branch line of all water lines (2); Make air inlet on every side inside and outside space form air cooling zone through cold nebulization summer, and higher air ' s wet bulb temperature is being reduced through temperature behind the cooled region; The condensed water of nozzle (3) ejection is by the cooling tower raw make up water source, behind refrigeration plant (12) time condensation, offers all water lines (2) by water pump (9) and is assigned to each branch line after nozzle (3) ejection.
2. cooling tower temperature adjusting method according to claim 1; It is characterized in that: inboard at the cooling tower air inlet; With row's wire (14) vertical hanging to storage cistern water surface from top to bottom, parallel being arranged in juxtaposition of wire (14) is to retaining around the cooling tower air inlet one; The bottom fuses with steel pipe (13), and ice removal is housed on steel pipe; One all water lines (2) of cooling tower air inlet arranged outside are the multilayer water lines, and each layer water lines connects the water main road through water knockout drum (6), and the water main road connects water pump (9), passes in the tower basin storage cistern; Nozzle (3) on one all water lines (2) branch line is antifreeze (operating) water nozzle.
3. cooling tower temperature adjusting method according to claim 2 is characterized in that: wire (14) diameter is 1～4mm, and distance is 10～30mm between the adjacent wire (14).
4. cooling tower temperature adjusting method according to claim 2; It is characterized in that: the control device that water pump (9) starts comprises temperature sensor, intelligent temperature controller, the time relay and is connected the A.C. contactor on the pump motor loop; Detect the water temperature in the storage cistern through sensor, and preestablish the upper and lower bound of water temperature; Be lower than down in limited time, the timing of intelligent temperature controller instruction time relay, the power supply of connecting pump motor through A.C. contactor makes pump working; Prescribe a time limit when water temperature raises or reaches, water pump cuts out automatically, quits work.
5. cooling tower temperature adjusting method according to claim 1 is characterized in that: be provided with condensate line in the tower (16) in the inner spraying and splashing facility of ventilator (1) top, on condensate line (16), be distributed with spray nozzle (17); Be provided with metal silk condenser (18) in condensate line (16) top; Condensate line (16) connects the water main road through spray main line (15), refrigeration pipe (11), refrigeration plant (12).
6. cooling tower temperature adjusting method according to claim 1 is characterized in that: in the cooling tower air inlet, liquid distribution lower outer space mounting has wind-driven generator (7), in the outlet of cooling tower storage cistern hydroelectric generator (4) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110424739 CN102466416B (en) | 2011-12-19 | 2011-12-19 | Temperature regulation method for cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110424739 CN102466416B (en) | 2011-12-19 | 2011-12-19 | Temperature regulation method for cooling tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102466416A true CN102466416A (en) | 2012-05-23 |
| CN102466416B CN102466416B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110424739 Expired - Fee Related CN102466416B (en) | 2011-12-19 | 2011-12-19 | Temperature regulation method for cooling tower |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501618A (en) * | 2014-12-22 | 2015-04-08 | 江苏海鸥冷却塔股份有限公司 | Water-saving and antifreezing cooling tower |
| CN105043129A (en) * | 2015-06-24 | 2015-11-11 | 山东新力拓节能服务工程科技有限公司 | Method for automatically judging whether cooling tower needs maintenance |
| CN110657688A (en) * | 2019-09-29 | 2020-01-07 | 山东大学 | Efficient cooling tower system and method adaptive to environmental crosswind |
| CN110779263A (en) * | 2019-11-29 | 2020-02-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Double-working-medium indirect air cooling system and control method thereof |
| CN112710164A (en) * | 2021-01-06 | 2021-04-27 | 唐伟明 | Energy-saving and efficiency-increasing method and device combining photovoltaic power generation and mechanical ventilation cooling tower |
| CN113883919A (en) * | 2021-10-28 | 2022-01-04 | 张旭 | Novel eight claw cooling towers |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB704965A (en) * | 1950-11-24 | 1954-03-03 | Film Cooling Towers 1925 Ltd | Improvements in or relating to water cooling towers |
| GB827971A (en) * | 1956-03-14 | 1960-02-10 | Cooling Towers Ltd | Improvements in and relating to water cooling towers |
| JPH08128791A (en) * | 1994-10-31 | 1996-05-21 | Hitachi Air Conditioning & Refrig Co Ltd | Cross-flow type cooling tower combined with counter-flow type one |
| CN1412126A (en) * | 2001-10-09 | 2003-04-23 | 刘万全 | Water purifying and descaling jacket for cooling tower |
| CN1740726A (en) * | 2005-03-18 | 2006-03-01 | 张富华 | Fast spraying freezing coldproof method |
| CN101105371A (en) * | 2007-06-28 | 2008-01-16 | 张富华 | Cooling column water temperature regulate and control method |
| CN101614486A (en) * | 2009-07-22 | 2009-12-30 | 北京布鲁斯盖环保科技发展有限公司 | Mechanical draft indirect dry cooling system |
| CN201926330U (en) * | 2011-02-19 | 2011-08-10 | 张新利 | Forced cooling type square cooling tower |
-
2011
- 2011-12-19 CN CN 201110424739 patent/CN102466416B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB704965A (en) * | 1950-11-24 | 1954-03-03 | Film Cooling Towers 1925 Ltd | Improvements in or relating to water cooling towers |
| GB827971A (en) * | 1956-03-14 | 1960-02-10 | Cooling Towers Ltd | Improvements in and relating to water cooling towers |
| JPH08128791A (en) * | 1994-10-31 | 1996-05-21 | Hitachi Air Conditioning & Refrig Co Ltd | Cross-flow type cooling tower combined with counter-flow type one |
| CN1412126A (en) * | 2001-10-09 | 2003-04-23 | 刘万全 | Water purifying and descaling jacket for cooling tower |
| CN1740726A (en) * | 2005-03-18 | 2006-03-01 | 张富华 | Fast spraying freezing coldproof method |
| CN101105371A (en) * | 2007-06-28 | 2008-01-16 | 张富华 | Cooling column water temperature regulate and control method |
| CN101614486A (en) * | 2009-07-22 | 2009-12-30 | 北京布鲁斯盖环保科技发展有限公司 | Mechanical draft indirect dry cooling system |
| CN201926330U (en) * | 2011-02-19 | 2011-08-10 | 张新利 | Forced cooling type square cooling tower |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501618A (en) * | 2014-12-22 | 2015-04-08 | 江苏海鸥冷却塔股份有限公司 | Water-saving and antifreezing cooling tower |
| CN105043129A (en) * | 2015-06-24 | 2015-11-11 | 山东新力拓节能服务工程科技有限公司 | Method for automatically judging whether cooling tower needs maintenance |
| CN110657688A (en) * | 2019-09-29 | 2020-01-07 | 山东大学 | Efficient cooling tower system and method adaptive to environmental crosswind |
| CN110779263A (en) * | 2019-11-29 | 2020-02-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Double-working-medium indirect air cooling system and control method thereof |
| CN112710164A (en) * | 2021-01-06 | 2021-04-27 | 唐伟明 | Energy-saving and efficiency-increasing method and device combining photovoltaic power generation and mechanical ventilation cooling tower |
| CN113883919A (en) * | 2021-10-28 | 2022-01-04 | 张旭 | Novel eight claw cooling towers |
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| CN102466416B (en) | 2013-09-04 |
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Granted publication date: 20130904 Termination date: 20181219 |