CN102466416B - Temperature regulation method for cooling tower - Google Patents
Temperature regulation method for cooling tower Download PDFInfo
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- CN102466416B CN102466416B CN 201110424739 CN201110424739A CN102466416B CN 102466416 B CN102466416 B CN 102466416B CN 201110424739 CN201110424739 CN 201110424739 CN 201110424739 A CN201110424739 A CN 201110424739A CN 102466416 B CN102466416 B CN 102466416B
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Abstract
The invention discloses a temperature regulation method for a cooling tower. The method is as follows: an inner side and an outer side of an air inlet of the cooling tower are respectively provided with a circle of water pipeline, nozzles are installed on the water pipelines, and in a summer, an air cooling area is formed by inner space and outer space around the air inlet through low temperature spray, thereby enabling high air wet bulb temperature to decrease after wet bulb passes through the cooling area; condensed water sprayed by the nozzles is obtained by supplying a water source by using the cooling tower, carrying out secondary condensation on the water source by using a refrigeration means, supplying obtained condensed water to the circles of water pipeline by using a water pump and then distributing the condensed water to each branch pipeline, and the condensed water is sprayed out by using the nozzles, a row of metal wires are vertically hung from top to bottom in the inner side of the air inlet of the cooling tower and hung above a water surface of a water storage tank, the metal wires are parallelly arranged so as to enclose the air inlet of the cooling tower, the bottoms of the metal wires are integrated into one by using a steel pipe, and a deicer is arranged on the steel pipe. According to the invention, the advantages of a simple structure, capacity of maintaining a temperature and cooling, safety, high efficiency, agility, utility and integration with nature are obtained; the cooling tower can automatically adjust air intake amount of the air inlet, and the temperature of cooling water is controlled to be in an optimal 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 heat and mass equipment important in the power plant production power generation process, and its effect is by 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 mixes contact by cold and hot two fluid streams in tower, poor by the partial pressure of water vapor between two fluid streams, hot fluid is 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 provides enough cooling waters to the condenser of Turbo-generator Set, 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 enters cooling tower form tiny water droplet or thin moisture film as much as possible, to increase contact area and the time of contact of water and air, be conducive to 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, summer cooling water actual temperature and the optimum temperature of design differ bigger, 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 the northern area of China entered winter, environment temperature can be down 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 that hangs deep bead to stop cold air; enter the intake of cooling tower with minimizing; 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, hang deep bead quantity and should satisfy minimum, the safe operation needs when the unit vacuum values is the highest of load valley (period after midnight) environment temperature, 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.Be subjected to the influence of weather condition, wind direction, wind scale bigger owing to hang the work of deep bead, 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 of Cai Yonging has substituted deep bead, coolant water temperature is controlled in a period of time, but because after wire netting froze, the ice film of formation was hole, in the process of dissolving, dissolve 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 that air quantity is adjusted in original design.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.Conducting heat namely, direct heat transferred air with recirculated water raises its temperature; And evaporation be by 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 discharged a large amount of used heat by evaporation to environment in cooling circulating water at present, and 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 that cooling water temperature changes control in ± 1 ℃ round the clock, eliminates the cooling tower freeze injury under the non-icing situation in cold snap trickle zone, realize the operation automation.
The technical solution used in the present invention is: in the inside and outside both sides of cooling tower air inlet one all water lines are set respectively, in water lines nozzle is installed, 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 water at low temperature of nozzle ejection is by the cooling tower raw make up water source, after the refrigeration plant secondary refrigeration, offers all water lines by water pump and is assigned to each branch line and sprays finally by nozzle.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.
In cooling tower air inlet inboard, vertical hanging is to the storage cistern water surface from top to bottom with row's wire, and wire is parallel to be arranged in juxtaposition, and to retaining around the cooling tower air inlet one, the bottom is connected with steel pipe, at steel pipe ice removal is housed.One all water lines of cooling tower air inlet arranged outside are the multilayer water lines, and each floor water lines connects the water main road by water knockout drum, and the water main road connects water pump, and passes in the tower basin storage cistern.Nozzle on one all water lines branch lines is antifreeze (operating) water nozzle.
In the winter time, 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 A.C. contactor on the pump motor loop.Detect water temperature in the storage cistern by 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 by A.C. contactor makes pump working; Prescribe a time limit when water temperature raises or reaches, water pump cuts out automatically, quits work, 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, water smoke contacts with wire, namely freezes fast, and wire is by thin chap, form the icicle of semicircle, 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 temperature range of the best.
Four, description of drawings
Fig. 1 is 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 by 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 deep well submerged pump, is placed on to replenish in the water source channel 10.The water at low temperature of nozzle 3 ejections is to be provided by refrigeration plant 12 reducing temperature twices refrigeration.Refrigeration plant 12 adopts the refrigeration plant of HBW-50(D).In the inboard all storage cisterns of cooling tower air inlet, establish divider wall 8, water at low temperature 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, provides necessary condition for additional water source time condensation circulates.
Above ventilator 1 inner spraying and splashing facility, be provided with water at low temperature pipeline 16 in the tower, be distributed with spray nozzle 17 at water at low temperature pipeline 16; Above water at low temperature pipeline 16, be provided with metal silk condenser 18; Water at low temperature pipeline 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, reduce the temperature of metal silk condenser 18, thereby minimizing 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 water at low temperature pipeline 16 and spray nozzle 17, with 0～15 ℃ of condensed water ejection that is lower than damp-heat air, the condensed water of ejection does not contact with the hot water of cooling procedure, only contacts with water vapour in the damp-heat air that rises and carries out condensation process.The water vapour rising is met condensation and is formed water droplet, and flowing mutually of cold and heat air can produce regular stronger wind-force again, and the natural draft of tower tube is strengthened.
Certain altitude above cooling tower internal spraying mouth 17, the metal silk condenser 18 that equates with cooling tower trickle area is installed, 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 to provide low-temperature receiver by condensed water, 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, enter 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, branch line in all water lines (2) is equipped with nozzle (3), 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 water at low temperature of nozzle (3) ejection is by the cooling tower raw make up water source, after refrigeration plant (12) secondary refrigeration, offers all water lines (2) by water pump (9) and is assigned to each branch line and sprays finally by nozzle (3).
2. cooling tower temperature adjusting method according to claim 1, it is characterized in that: in cooling tower air inlet inboard, with one row wire (14) from top to bottom vertical hanging to the storage cistern water surface, parallel being arranged in juxtaposition of wire (14), to retaining around the cooling tower air inlet one, the bottom is connected with steel pipe (13), at steel pipe ice removal is housed; One all water lines (2) of cooling tower air inlet arranged outside are the multilayer water lines, and each floor water lines connects the water main road by 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, it is characterized in that: wire (14) diameter is 1～4mm, distance is 10～30mm between the adjacent wire (14).
4. cooling tower temperature adjusting method according to claim 2, it is characterized in that: in the winter time, the start and stop of water pump are to be determined by the temperature of cooling water, the control device that water pump (9) starts comprises temperature sensor, intelligent temperature controller, the time relay and is connected A.C. contactor on the pump motor loop, detect water temperature in the storage cistern by 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 by 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 water at low temperature pipeline (16) in the tower in the inner spraying and splashing facility of ventilator (1) top, be distributed with spray nozzle (17) at water at low temperature pipeline (16); Be provided with metal silk condenser (18) in water at low temperature pipeline (16) top; Water at low temperature pipeline (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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110424739 CN102466416B (en) | 2011-12-19 | 2011-12-19 | Temperature regulation method for cooling tower |
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| CN102466416A CN102466416A (en) | 2012-05-23 |
| CN102466416B true CN102466416B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110424739 Expired - Fee Related CN102466416B (en) | 2011-12-19 | 2011-12-19 | Temperature regulation method for cooling tower |
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Families Citing this family (5)
| 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 |
| CN105043129B (en) * | 2015-06-24 | 2017-12-12 | 山东新力拓节能服务工程科技有限公司 | Whether a kind of automatic decision cooling tower needs the method safeguarded |
| 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 |
Citations (7)
| 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 |
| CN1412126A (en) * | 2001-10-09 | 2003-04-23 | 刘万全 | Water-cleaning 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2923439B2 (en) * | 1994-10-31 | 1999-07-26 | 日立冷熱株式会社 | Crossflow type cooling tower combining countercurrent type |
-
2011
- 2011-12-19 CN CN 201110424739 patent/CN102466416B/en not_active Expired - Fee Related
Patent Citations (7)
| 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 |
| CN1412126A (en) * | 2001-10-09 | 2003-04-23 | 刘万全 | Water-cleaning 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 |
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