CN102003913A - Method for saving water and preventing fog and icing of evaporative heat-exchange device and filler assembly - Google Patents
Method for saving water and preventing fog and icing of evaporative heat-exchange device and filler assembly Download PDFInfo
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- CN102003913A CN102003913A CN 201010534726 CN201010534726A CN102003913A CN 102003913 A CN102003913 A CN 102003913A CN 201010534726 CN201010534726 CN 201010534726 CN 201010534726 A CN201010534726 A CN 201010534726A CN 102003913 A CN102003913 A CN 102003913A
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Abstract
The invention belongs to the field of evaporative heat-exchange devices. The method for saving water and preventing fog and icing of an evaporative heat-exchange device controls the evaporation latent heat of the spray water and the radiating heat of air, reduces the evaporation capacity of the spray water when the heat-exchange device runs in winter, and improves the radiating heat of cold air by changing the spray water distribution area and the ventilation heat-exchange way of a filler surface of the heat-exchange device. The invention also provides a new process regulating the filler evaporative water quantity and the temperature and relative humidity of air on a fan outlet; by changing the circulating area of the spray water on the filler surface, and utilizing the cold air with low enthalpy in winter to improve the radiating heat of the air and control the evaporative water quantity, the proper temperature of the spray water is maintained, the relatively higher temperature and relatively lower humidity of the air on an exhaust outlet are guaranteed, and the fog generated by the condensation of water vapor on the exhaust outlet is reduced.
Description
Technical field
The invention belongs to vaporation-type heat-exchange apparatus field, particularly the heat-exchange method of vaporation-type heat transmission equipment the invention still further relates to the heat exchange filler assembly in addition.
Background technology
The vaporation-type heat transmission equipment comprises open type tower, evaporative condenser or vaporation-type fluid cooler etc., as Fig. 1, Fig. 2 and shown in Figure 3, be to utilize forced ventilation, spray is partly evaporated at the recirculated water of filling surface, take away heat, realize recirculated water cooling cooling, keep the wet type heat transmission equipment of low water temperature.Owing to be to utilize shower water partly to evaporate to realize cooling, there is not the dry type heat exchange of water evaporates relatively, its heat exchange efficiency height, cost are low, and recirculated water is reduced near air ' s wet bulb temperature, have obtained using widely in industrial and agricultural production.With respect to the heat exchange of cooling water straight-line, can save water for industrial use more than 90%, and the PVC filler open type cooling tower of the big caloic transmission area of similar employing, in recent years, enclosed tower and evaporating type condensing cooling device are also adopting heat exchanger tube and filler combination form, and the secondary heat exchange filler obviously improves heat exchange efficiency.But, because large-area filler uses, make the thermic load of equipment bigger with seasonal variations, especially drop to when very low when environment wet-bulb temperature, the low excessively icing phenomenon of shower water temperature appears in heat transmission equipment filling surface easily, because the moisture excessive vaporization causes the unnecessary waste of shower water, as traditional cross-flow type heat transmission equipment filler, arrange between its adjacent two PVC fillers apart from general＜30mm, parallel both ends open design, shower water directly is distributed to two sides of filler from filler top, common two sides all are designed to various concave-convex curved surfaces, increases heat and mass area and gas-liquid mass transfer time of contact.Shower water is under the gravity effect, flow along these concavo-convex three-dimensional configuration grooves are tortuous, through being several times as much as the mobile distance of packed height, the outside air that passes through with crossing current carries out sufficient caloic exchange, under the driving of saturated vapor pressure reduction, part shower water evaporation makes air by filler near saturation state, is discharged in the environment through the axial flow blower suction.And because blower fan outlet air relative humidity is bigger, be discharged in the low temperature and moisture atmosphere, can produce white mist phenomenon, environment is produced influence in various degree.
Solution to the problems referred to above mainly is to adopt electrically heated mode at present, keep the shower water temperature and be higher than freezing temperature, but cold district in the winter time, cooling tower air inlet place the serious phenomenon of freezing occurs through regular meeting, and its main cause is that environment temperature is low excessively, and air intake place shower water temperature is low excessively, phenomenon appears constantly freezing, ice layer thickness constantly increase can have a strong impact on the normal function of packing layer, and all needs extra additional energy consumption, has consumed a lot of unnecessary water evaporates; Demist technology mainly is to adopt at the air inlet place part air to be carried out heat temperature raising and handle, or improves its relative humidity to heating through the air of filler humidification, reduces the outlet air dew-point temperature, and the water smoke that reduces surrounding environment pollutes.
Summary of the invention
The objective of the invention is to overcome above-mentioned not enough problem, a kind of vaporation-type heat transmission equipment water saving, antifog and anti-freezed in winter method are provided, when transition season or winter operation the caloic transfer mode is regulated, effectively utilized the sensible heat of Cryogenic air, reduce shower water evaporation capacity and circulating water temperature.The present invention also provides vaporation-type heat transmission equipment water saving, antifog and anti-freezed in winter filler assembly in addition, and simple in structure, refrigeration is good, realizes water saving, antifog and anti-freeze purpose.
The technical scheme that the present invention is adopted for achieving the above object is: the water saving of vaporation-type heat transmission equipment, antifog and anti-freezed in winter method, by changing heat transmission equipment filling surface shower water distribution area and ventilation heat exchange mode, the evaporation latent heat of control shower water and the sensible heat amount of air, the evaporation capacity of shower water when reducing winter operation improves cold air sensible heat amount.
Described vaporation-type heat transmission equipment adopts dried wet mixing to close operation, and forced ventilation is through filling surface, and the wet type operation has the filling surface of shower water to carry out evaporation and heat-exchange, and air is heated up by humidification; The filling surface air that dry-running does not have shower water carries out heat convection, and air only improves temperature by heat convection, fully mixes in tower by dried after the filler heat exchange, humid air, is discharged in the environment through blower fan again.
Described dried wet mixing is closed operation and is adopted the dry-running in filler two surfaces, the operation of another side wet type.
Vaporation-type heat transmission equipment water saving of the present invention, antifog and anti-freezed in winter filler assembly, equidistant arranging between each sheet filler, per two fillers are a filler group, and each edge, two filler the tops of filler group seals according to thermic load and environment wet-bulb temperature, and non-tight connects between each filler group.
Two sides of described filler all are various concave-convex curved surfaces.
Described filler assembly is the filler assembly that is applicable to full filler crossflow cooling tower, the filled knockdown evaporative condenser of coil pipe or closed cooling tower.
The inventive method is novel unique, to do wet operation organically combines, a kind of new technology of regulating filler evaporated water and blower fan outlet air temperature and relative humidity is provided, hang down season at environment wet-bulb temperature, filling surface shower water area is reduced, and no shower water surface utilizes the air sensible heat to carry out heat convection.Adopt dried wet mixing to close the method for operation, shower water evaporation mass transfer area can reduce by 50%, and unit are filling surface shower water flow increases by 50%, and circulating water temperature obviously raises, and reduction shower water temperature is crossed low and icing trend occurred.Shower water comprises the rational distribution method of evaporation latent heat and convection current sensible heat in the caloic exchanged form of filling surface, and to shower water excessive vaporization, air-out spoken parts in an opera mist and the filling surface inhibitory action of freezing in winter.
Filler assembly of the present invention is simple in structure, substantially do not change the overall structure and the installation and application of present refrigeration plant, only be to carry out simple encapsulation process, process easy to use, realization is done, the method for operation is closed in wet mixing, by changing filling surface shower water circulation area, utilize the cold air of low enthalpy in winter, improve the heat that the air sensible heat is taken away, the control evaporated water, thereby keep the shower water preference temperature, guarantee exhaust outlet air higher temperature and, alleviate the white mist phenomenon that exhaust outlet steam condenses and produces than low relative humidity.The present invention is widely used in full filler crossflow cooling tower, the filled knockdown evaporative condenser of coil pipe or closed cooling tower.
Description of drawings
Fig. 1 is a symmetric form crossflow cooling tower structural representation;
Fig. 2 is small-sized crossflow cooling tower structural representation;
Fig. 3 is the evaporating type condensing or the cooler construction schematic diagram of band filler;
Fig. 4 is a conventional filler wet type operation filler assembly schematic diagram;
Fig. 5 is a filler dry-and wet-type mixed running filler assembly schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing content of the present invention is further described.
Embodiment 1: evaporative condenser as shown in Figure 3, upper box is a heat exchange coil 1, lower box is crossing current PVC secondary heat exchange filler assembly 2, filler assembly 2 two-sided heat exchange gross area 4600m
2, intake 53m
3/ s, 27 ℃ of wet-bulb temperature, 35 ℃ of condensation temperatures, heat exhaust 1200kW.When environment wet-bulb temperature is 2 ℃, the operation of filler wet type, equipment normally moves thermic load can reach 3460kW, and system's actual row heat only needs 1200 kW.
Wherein filler assembly adopts filler assembly as shown in Figure 5, per two fillers 4 are a filler group 3, each filler group is arranged and edge, the top 5 is tightly connected by equidistant, arrange by equidistant between the filler group 3, non-tight connects between each filler group 3,4 two sides of filler all are various concave-convex curved surfaces, close the state operation by adopting this structured packing to realize doing wet mixing, evaporation latent heat and convection current sensible heat transfer ratio can reach 50:50, can do wet mixing for northern area closes operation and reaches six months, the spray circulating water temperature maintains more than 25 ℃ all the time, save evaporated water 30%～40%, and the outlet air dew-point temperature can raise 6～8 ℃, largely reduced icing trend and white mist phenomenon.
Embodiment 2: vaporation-type closed cooling tower product as shown in Figure 3, upper box heat exchange coil 1, lower box crossing current PVC heat exchange filler assembly 2, the two-sided heat exchange gross area 7200 m of filler assembly
2, intake 98.4 m
3/ s, 28 ℃ of wet-bulb temperature are imported and exported 37/32 ℃ of water temperature, heat exhaust 2250kW.Suppose that thermic load is not with seasonal variations, when environment wet-bulb temperature is lower than 2 ℃, employing wet type operational outfit exchange capability of heat will be above 6000kW, if press the normal heat load operation, the import and export water temperature is corresponding will to be reduced a lot, temperature is reduced hard-core system can continue operation, but, need extra electrical heating antifreezing technology because water temperature is lower.
Wherein filler assembly adopts filler assembly as shown in Figure 5, per two fillers are a filler group 3, two fillers 4 of filler group are arranged and edge, the top 5 is tightly connected by equidistant, arrange by equidistant between the filler group 3, non-tight connects between each filler group, two sides of filler all are various concave-convex curved surfaces, close the state operation by adopting this structured packing to realize doing wet mixing, it is constant or lower slightly that the system that keeps imports and exports water temperature, make full use of the sensible heat of low ambient temperature air, the sensible heat amount of discharging in the heat is brought up to more than 50%, evaporated water reduces by 30%～40%, air outlet slit relative humidity reduces about 30%, and corresponding dew-point temperature reduces by 5～7 ℃, has obviously alleviated facilities air and has gone out spoken parts in an opera mist and the icing phenomenon of air inlet.
Adopt the present invention, can control the evaporation capacity of shower water, reduce the dew-point temperature of blower fan outlet air, change the cloth liquid mode of the filling surface that is arranged in parallel, with per two fillers is a filler group 3, edge, two filler 4 the tops 5 sealings of filler group connect, change heat transmission equipment filling surface shower water distribution area and ventilation heat exchange mode, make every filler two the surface dry-runnings, another side is the wet type operation, forced ventilation has the surface of shower water to be mainly evaporation and heat-exchange through filling surface, and not having the spray water surface is the heated heat convection mode of air.Make the cold dry air of environment pass through two surfaces of filler respectively like this, portion of air is heated up by humidification, and another part air only improves temperature by heat convection, and the air after the filler heat exchange mixes in tower, is discharged in the environment through blower fan again.With respect to conventional vaporation-type formula heat transmission equipment, institute's air discharged is near saturation state, and the air of part dry-running is raised after the temperature in the air of humidification is mixed following difference arranged, and (1) dry-bulb temperature raises; (2) relative humidity reduces; (3) dew-point temperature reduces.The heat exchange mode that wet mixing is closed is done in employing, and shower water evaporation mass transfer area reduces, and air sensible heat amount increases in total heat exhaust, and the evaporation latent heat amount reduces relatively, and the shower water temperature raises relatively, and the icing phenomenon of filling surface reduces.
Claims (6)
1. vaporation-type heat transmission equipment water saving, antifog and anti-freezed in winter method, it is characterized in that: by changing heat transmission equipment filling surface shower water distribution area and ventilation heat exchange mode, the evaporation latent heat of control shower water and the sensible heat amount of air, the evaporation capacity of shower water when reducing winter operation improves cold air sensible heat amount.
2. vaporation-type heat transmission equipment water saving according to claim 1, antifog and anti-freezed in winter method, it is characterized in that: the vaporation-type heat transmission equipment adopts dried wet mixing to close operation, forced ventilation is through filling surface, and the wet type operation has the filling surface of shower water to carry out evaporation and heat-exchange, and air is heated up by humidification; The filling surface air that dry-running does not have shower water carries out heat convection, and air only improves temperature by heat convection, fully mixes in tower by dried after the filler heat exchange, humid air, is discharged in the environment through blower fan again.
3. vaporation-type heat transmission equipment water saving according to claim 1 and 2, antifog and anti-freezed in winter method is characterized in that: dried wet mixing is closed operation and is adopted the dry-running in filler two surfaces, the operation of another side wet type.
4. vaporation-type heat transmission equipment water saving, antifog and anti-freezed in winter filler assembly, it is characterized in that: equidistant arranging between each sheet filler, per two fillers are a filler group, and each edge, two filler the tops of filler group seals according to thermic load and environment wet-bulb temperature, and non-tight connects between each filler group.
5. vaporation-type heat transmission equipment water saving according to claim 4, antifog and anti-freezed in winter filler assembly, it is characterized in that: two sides of filler all are various concave-convex curved surfaces.
6. according to claim 4 or the water saving of 5 described vaporation-type heat transmission equipments, antifog and anti-freezed in winter filler assembly, it is characterized in that: filler assembly is the filler assembly that is applicable to full filler crossflow cooling tower, the filled knockdown evaporative condenser of coil pipe or closed cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010534726 CN102003913A (en) | 2010-11-08 | 2010-11-08 | Method for saving water and preventing fog and icing of evaporative heat-exchange device and filler assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010534726 CN102003913A (en) | 2010-11-08 | 2010-11-08 | Method for saving water and preventing fog and icing of evaporative heat-exchange device and filler assembly |
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| CN102003913A true CN102003913A (en) | 2011-04-06 |
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| CN 201010534726 Pending CN102003913A (en) | 2010-11-08 | 2010-11-08 | Method for saving water and preventing fog and icing of evaporative heat-exchange device and filler assembly |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610232A (en) * | 2016-12-28 | 2017-05-03 | 山东大学 | Continuously-arranged-filler type dry-wet mixed large-sized cooling tower, cooling system and method for improving cooling efficiency of cooling tower |
| CN107906981A (en) * | 2017-12-17 | 2018-04-13 | 北京中热能源科技有限公司 | A kind of heat exchanger for evaporative condenser |
| CN110160371A (en) * | 2018-02-11 | 2019-08-23 | 广州览讯科技开发有限公司 | A kind of centrifugation exhausting both sides air inlet top air-out cross flow cooling tower |
| CN113390138A (en) * | 2021-05-14 | 2021-09-14 | 苏州科技大学 | Spray device with built-in dry-wet integrated filler |
Citations (7)
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|---|---|---|---|---|
| JPS6176880A (en) * | 1984-09-19 | 1986-04-19 | Ishikawajima Harima Heavy Ind Co Ltd | Dry-humid type cold water tower |
| JPH08219685A (en) * | 1995-02-17 | 1996-08-30 | Mitsubishi Heavy Ind Ltd | Cross flow type gas liquid contact type cooling tower |
| US5775409A (en) * | 1995-10-30 | 1998-07-07 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Cooling tower |
| JPH1163885A (en) * | 1997-08-21 | 1999-03-05 | Ishikawajima Harima Heavy Ind Co Ltd | Cooling water tower |
| EP0915312A2 (en) * | 1997-11-07 | 1999-05-12 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Cooling tower |
| JP2000193379A (en) * | 1998-12-25 | 2000-07-14 | Ishikawajima Harima Heavy Ind Co Ltd | Cold water tower |
| CN1888802A (en) * | 2006-07-21 | 2007-01-03 | 清华大学 | Antifreezing and fogging water-saving cooling tower |
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2010
- 2010-11-08 CN CN 201010534726 patent/CN102003913A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| JPS6176880A (en) * | 1984-09-19 | 1986-04-19 | Ishikawajima Harima Heavy Ind Co Ltd | Dry-humid type cold water tower |
| JPH08219685A (en) * | 1995-02-17 | 1996-08-30 | Mitsubishi Heavy Ind Ltd | Cross flow type gas liquid contact type cooling tower |
| US5775409A (en) * | 1995-10-30 | 1998-07-07 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Cooling tower |
| JPH1163885A (en) * | 1997-08-21 | 1999-03-05 | Ishikawajima Harima Heavy Ind Co Ltd | Cooling water tower |
| EP0915312A2 (en) * | 1997-11-07 | 1999-05-12 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Cooling tower |
| JP2000193379A (en) * | 1998-12-25 | 2000-07-14 | Ishikawajima Harima Heavy Ind Co Ltd | Cold water tower |
| CN1888802A (en) * | 2006-07-21 | 2007-01-03 | 清华大学 | Antifreezing and fogging water-saving cooling tower |
Non-Patent Citations (1)
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| 《汽轮机技术》 19840630 杨开明 怎样控制自然通风冷却塔结冰 60-63页 1-6 , 第3期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610232A (en) * | 2016-12-28 | 2017-05-03 | 山东大学 | Continuously-arranged-filler type dry-wet mixed large-sized cooling tower, cooling system and method for improving cooling efficiency of cooling tower |
| CN106610232B (en) * | 2016-12-28 | 2019-02-26 | 山东大学 | Dry and wet mixing large cooling column, cooling system and the method for continuous filler arrangement |
| CN107906981A (en) * | 2017-12-17 | 2018-04-13 | 北京中热能源科技有限公司 | A kind of heat exchanger for evaporative condenser |
| CN110160371A (en) * | 2018-02-11 | 2019-08-23 | 广州览讯科技开发有限公司 | A kind of centrifugation exhausting both sides air inlet top air-out cross flow cooling tower |
| CN113390138A (en) * | 2021-05-14 | 2021-09-14 | 苏州科技大学 | Spray device with built-in dry-wet integrated filler |
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Application publication date: 20110406 |