CN204301389U - In conjunction with evaporative cooling and mechanically refrigerated power generating plant cooling tower water-saving system - Google Patents
In conjunction with evaporative cooling and mechanically refrigerated power generating plant cooling tower water-saving system Download PDFInfo
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- CN204301389U CN204301389U CN201420542186.9U CN201420542186U CN204301389U CN 204301389 U CN204301389 U CN 204301389U CN 201420542186 U CN201420542186 U CN 201420542186U CN 204301389 U CN204301389 U CN 204301389U
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- 238000001816 cooling Methods 0.000 title claims abstract description 104
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 199
- 238000005057 refrigeration Methods 0.000 claims abstract description 27
- 239000007921 spray Substances 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 12
- 238000004378 air conditioning Methods 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 4
- 238000012856 packing Methods 0.000 description 17
- 238000009423 ventilation Methods 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 9
- 238000005507 spraying Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
Description
技术领域technical field
本实用新型属于冷却降温设备技术领域,具体涉及一种结合蒸发冷却与机械制冷的发电厂冷却塔节水系统。The utility model belongs to the technical field of cooling equipment, in particular to a water-saving system for a cooling tower of a power plant combined with evaporative cooling and mechanical refrigeration.
背景技术Background technique
火力发电厂的冷却塔由于其自身的工作原理,会造成大量的水被蒸发,按照冷却塔理论设计的蒸发损失率占总循环水量的百分数计算,三天时间即可将循环量蒸发掉。由此可见,冷却塔水蒸发的损失很大。Due to its own working principle, the cooling tower of a thermal power plant will cause a large amount of water to be evaporated. According to the theoretical design of the cooling tower, the evaporation loss rate is calculated as a percentage of the total circulating water volume, and the circulating volume can be evaporated within three days. It can be seen that the loss of cooling tower water evaporation is very large.
目前,最常见的减少蒸发水损失的方法是在冷却塔内部设置收水器,但是该方法只能将液滴的水收回,而塔内的饱和水蒸汽也会随着风机的转动而排出,这一部分的水损耗也占了冷却塔耗水量的一大部分。另一种减少冷却塔蒸发水损失的方法,采用的是在冷却塔内用水做冷凝剂,使水蒸汽冷凝成水,从而减少冷却塔的水蒸发损失,以实现冷却塔节水,降低水耗的目的。这种方法的要求是水温要低于冷却塔出口空气的湿球温度才能将水蒸汽冷凝成水。目前已有企业使用高效雾化装置,此装置可以起到洗尘降温的作用,可以使得水蒸发损失降低60%左右。At present, the most common way to reduce the loss of evaporative water is to install a water eliminator inside the cooling tower, but this method can only recover the droplet water, and the saturated water vapor in the tower will also be discharged with the rotation of the fan. This part of the water loss also accounts for a large part of the cooling tower's water consumption. Another way to reduce the loss of cooling tower evaporation water is to use water as a condensing agent in the cooling tower to condense the water vapor into water, thereby reducing the water evaporation loss of the cooling tower, so as to save water in the cooling tower and reduce water consumption. the goal of. The requirement of this method is that the water temperature must be lower than the wet bulb temperature of the cooling tower outlet air to condense the water vapor into water. At present, enterprises have used high-efficiency atomization devices, which can play the role of dust cleaning and cooling, and can reduce water evaporation loss by about 60%.
基于上述理由,将蒸发冷却冷水机组与机械制冷联合构成的冷水机组应用到电厂的冷却塔节水措施中,经过蒸发冷却与机械制冷联合制出的冷水通过雾化喷嘴喷到塔内,水蒸汽凝结成水后一起落到集水池内;由于蒸发冷却与机械制冷联合的冷水机组可以制取出18℃左右的冷水,低于空气的湿球温度,这样就满足了水蒸汽冷凝的条件,从而降低系统背压,提高汽轮机发电效率,降低发电煤耗。Based on the above reasons, the chiller unit composed of evaporative cooling chiller and mechanical refrigeration is applied to the water-saving measures of the cooling tower of the power plant. The cold water produced by the combination of evaporative cooling and mechanical refrigeration is sprayed into the tower through the atomizing nozzle, and the water vapor is condensed. After the water is formed, it falls into the sump together; because the chiller combined with evaporative cooling and mechanical refrigeration can produce cold water at about 18°C, which is lower than the wet bulb temperature of the air, thus meeting the conditions for water vapor condensation and reducing the system temperature. Back pressure improves steam turbine power generation efficiency and reduces coal consumption for power generation.
实用新型内容Utility model content
本实用新型的目的在于提供一种结合蒸发冷却与机械制冷的发电厂冷却塔节水系统,不仅可以很有效的解决冷却塔蒸发水损失的问题,还可以降低冷却塔内部的温度。The purpose of this utility model is to provide a cooling tower water-saving system of a power plant combining evaporative cooling and mechanical refrigeration, which can not only effectively solve the problem of cooling tower evaporation water loss, but also reduce the temperature inside the cooling tower.
本实用新型所采用的技术方案是,结合蒸发冷却与机械制冷的发电厂冷却塔节水系统,包括有通过管网连接的闭式蒸发冷却冷水机组、机械制冷系统及自然通风冷却塔。The technical solution adopted by the utility model is that the cooling tower water-saving system of a power plant combining evaporative cooling and mechanical refrigeration includes a closed evaporative cooling water chiller connected through a pipe network, a mechanical refrigeration system and a natural ventilation cooling tower.
本实用新型的特点还在于:The utility model is also characterized in that:
其中的闭式蒸发冷却冷水机组,包括有机组壳体,机组壳体相对的两侧壁上分别设置有一次风进风口a、一次风进风口b;机组壳体内左右两侧对称设置有第一管式间接蒸发冷却器、第二管式间接蒸发冷却器,第一管式间接蒸发冷却器与第二管式间接蒸发冷却器之间设置有直接蒸发冷却器;第一管式间接蒸发冷却器上方依次设置有挡水板c和风机c;第二管式间接蒸发冷却器的上方依次设置有挡水板a和风机a;直接蒸发冷却器的上方依次设置有挡水板b和风机b;风机c、风机b及风机a对应的机组壳体顶壁上均设置有排风口。The closed evaporative cooling water chiller includes an organic unit casing, and the primary air inlet a and the primary air inlet b are respectively arranged on the opposite side walls of the unit casing; the left and right sides of the unit casing are symmetrically arranged with first Tube-type indirect evaporative cooler, second tube-type indirect evaporative cooler, a direct evaporative cooler is arranged between the first tube-type indirect evaporative cooler and the second tube-type indirect evaporative cooler; the first tube-type indirect evaporative cooler A water baffle c and a fan c are sequentially arranged on the top; a water baffle a and a fan a are sequentially arranged above the second tubular indirect evaporative cooler; a water baffle b and a fan b are sequentially arranged above the direct evaporative cooler; Fan c, fan b, and fan a are provided with air outlets on the top wall of the casing of the unit corresponding to fan c.
其中的第一管式间接蒸发冷却器,包括有管式换热器a,管式换热器a的上方设置有第一喷淋装置,管式换热器a的下方设置有水箱a,水箱a通过第一供水管与第一喷淋装置连通;第一供水管上设置有第一循环水泵;管式换热器a与水箱a之间形成第一风道,第一风道对应的机组壳体侧壁上设置有二次风进风口a;管式换热器a由多根水平设置的换热管组成。The first tubular indirect evaporative cooler includes a tubular heat exchanger a, a first spray device is arranged above the tubular heat exchanger a, a water tank a is arranged below the tubular heat exchanger a, and the water tank a communicates with the first spraying device through the first water supply pipe; the first water supply pipe is provided with a first circulating water pump; a first air duct is formed between the tubular heat exchanger a and the water tank a, and the unit corresponding to the first air duct A secondary air inlet a is arranged on the side wall of the housing; the tubular heat exchanger a is composed of a plurality of horizontally arranged heat exchange tubes.
其中的第二管式间接蒸发冷却器,包括有管式换热器b,管式换热器b的上方设置有第二喷淋装置,管式换热器b的下方设置有水箱c,水箱c通过第二供水管与第二喷淋装置连通;第二供水管上设置有第二循环水泵;管式换热器b与水箱c之间形成第二风道,第二风道对应的机组壳体侧壁上设置有二次风进风口b;管式换热器b由多根水平设置的换热管组成。The second tubular indirect evaporative cooler includes a tubular heat exchanger b, a second spray device is arranged above the tubular heat exchanger b, and a water tank c is arranged below the tubular heat exchanger b. c communicates with the second spraying device through the second water supply pipe; the second water supply pipe is provided with a second circulating water pump; a second air duct is formed between the tubular heat exchanger b and the water tank c, and the unit corresponding to the second air duct The side wall of the casing is provided with a secondary air inlet b; the tubular heat exchanger b is composed of a plurality of horizontally arranged heat exchange tubes.
其中的直接蒸发冷却器,包括有V型填料,V型填料的上方依次设置有冷却盘管及第三喷淋装置;V型填料的下方设置有水箱b,水箱b通过第三供水管与第三喷淋装置连通,第三供水管上设置有第三循环水泵;V型填料与水箱b之间形成第三风道。The direct evaporative cooler includes a V-shaped packing, and a cooling coil and a third spray device are arranged above the V-shaped packing in sequence; a water tank b is arranged below the V-shaped packing, and the water tank b is connected to the first water supply pipe through the third water supply pipe. The three spraying devices are connected, and the third water supply pipe is provided with a third circulating water pump; a third air duct is formed between the V-shaped packing and the water tank b.
冷却盘管的进水口通过第一水管与空调末端的出水口连接,冷却盘管的出水口通过第二水管与空调末端的进水口连接;第二水管还分别与机械制冷系统、自然通风冷却塔连接;第二水管上设置有阀门a。The water inlet of the cooling coil is connected to the water outlet at the end of the air conditioner through the first water pipe, and the water outlet of the cooling coil is connected to the water inlet at the end of the air conditioner through the second water pipe; the second water pipe is also connected with the mechanical refrigeration system and the natural ventilation cooling tower respectively. connection; the second water pipe is provided with a valve a.
其中的机械制冷系统,包括有压缩机,压缩机依次与蒸发器、节流阀及冷凝器连接构成闭合回路,蒸发器通过第三水管与第二水管连接。The mechanical refrigeration system includes a compressor, which is sequentially connected to an evaporator, a throttle valve and a condenser to form a closed circuit, and the evaporator is connected to the second water pipe through a third water pipe.
第三水管上设置有阀门b。The third water pipe is provided with a valve b.
自然通风冷却塔,包括有塔体,塔体的顶壁设置有排风出口;塔体内设置有填料,填料的上方依次设置有布水装置、收水器及多个雾化喷嘴,多个雾化喷嘴通过第四水管与第二水管连接;填料的下方设置有集水池,集水池连接有冷水出水管,填料与集水池之间形成空气流道,空气流道对应的塔体侧壁上设置有空气入口。The natural ventilation cooling tower includes a tower body, the top wall of the tower body is provided with an exhaust outlet; the tower body is provided with packing, and the top of the packing is successively provided with a water distribution device, a water collector and multiple atomizing nozzles, and multiple mist The spray nozzle is connected to the second water pipe through the fourth water pipe; there is a sump below the packing, and the cold water outlet pipe is connected to the sump, and an air flow channel is formed between the packing and the sump, and the corresponding air flow channel is set on the side wall of the tower body. There are air inlets.
布水装置由热水进水管及设置于热水进水管上的多个喷嘴组成,多个喷嘴呈均匀设置;第四水管上设置有水泵。The water distribution device is composed of a hot water inlet pipe and a plurality of nozzles arranged on the hot water inlet pipe, and the plurality of nozzles are evenly arranged; the fourth water pipe is provided with a water pump.
本实用新型的有益效果在于:The beneficial effects of the utility model are:
1.本实用新型的发电厂冷却塔节水系统将蒸发冷却与机械制冷联合的冷水机组应用到冷却塔的节水措施中,一方面可以将水蒸汽水蒸汽冷凝后一起落回到集水池内,减少冷却塔的蒸发水损失;另一方面也可以降低冷却塔水温,使得汽轮机真空度提高,降低背压,提高热效率,节约发电煤耗。1. The cooling tower water-saving system of the power plant of the present utility model applies the chiller combined with evaporative cooling and mechanical refrigeration to the water-saving measures of the cooling tower. , to reduce the evaporation water loss of the cooling tower; on the other hand, it can also reduce the water temperature of the cooling tower, so that the vacuum degree of the steam turbine can be improved, the back pressure can be reduced, the thermal efficiency can be improved, and the coal consumption of power generation can be saved.
2.本实用新型的发电厂冷却塔节水系统中,蒸发冷却的冷水机组出水温度在空气的湿球温度与露点温度之间,而机械制冷冷水机组的出水温度可以达到7℃左右,二者经过一定比例混合后,水温可以达到冷却塔出口空气露点温度以下,这样就达到了水蒸汽冷凝的条件。2. In the cooling tower water-saving system of the power plant of the present utility model, the outlet water temperature of the evaporative cooling chiller is between the wet bulb temperature and the dew point temperature of the air, while the outlet water temperature of the mechanical refrigeration chiller can reach about 7°C. After mixing in a certain proportion, the water temperature can reach below the dew point temperature of the outlet air of the cooling tower, thus achieving the conditions for water vapor condensation.
3.本实用新型的发电厂冷却塔节水系统中,蒸发冷却与机械制冷的冷水出水管上各自安装有阀门,可以根据冷却塔内的冷却效率,调节二者的流量比,从而调节喷淋水温度。3. In the cooling tower water-saving system of the power plant of the present invention, valves are respectively installed on the cold water outlet pipes of evaporative cooling and mechanical refrigeration, and the flow ratio of the two can be adjusted according to the cooling efficiency in the cooling tower, thereby adjusting the spraying water temperature.
4.本实用新型的发电厂冷却塔节水系统中,产生的冷水一部分进入到冷却塔上部进行喷淋;另一部分冷水进入到发电厂办公室的空调末端内,经过换热后,进入到换热盘管内,进行循环。4. In the cooling tower water-saving system of the power plant of the present utility model, part of the cold water generated enters the upper part of the cooling tower for spraying; the other part of the cold water enters the air conditioner terminal of the power plant office, and after heat exchange, enters the heat exchange In the coil, circulate.
5.本实用新型的发电厂冷却塔节水系统中,冷却塔采用双曲线自然通风式冷却塔,没有采用风机,减少了投资。5. In the cooling tower water-saving system of the power plant of the present invention, the cooling tower adopts a hyperbolic natural ventilation cooling tower, and no fan is used, which reduces investment.
附图说明Description of drawings
图1是本实用新型结合蒸发冷却与机械制冷的发电厂冷却塔节水系统的结构示意图。Fig. 1 is a structural schematic diagram of a cooling tower water-saving system of a power plant combining evaporative cooling and mechanical refrigeration according to the present invention.
图中,1.水箱a,2.管式换热器a,3.水箱b,4.V型填料,5.水箱c,6.管式换热器b,7.挡水板a,8.风机a,9.冷却盘管,10.风机b,11.挡水板b,12.风机c,13.挡水板c,14.压缩机,15.蒸发器,16.节流阀,17.冷凝器,18.阀门a,19.阀门b,20.雾化喷嘴,21.自然通风冷却塔,22.集水池,23.空调末端,24.第一供水管,25.第一循环水泵,26.二次风进风口a,27.第二供水管,28.第二循环水泵,29.二次风进风口b,30.第三供水管,31.第三循环水泵,32.填料,33.热水进水管,34.冷水出水管,35.收水器,36.一次风进风口a,37.一次风进风口b,G1.第一水管,G2.第二水管,G3.第三水管,G4.第四水管。In the figure, 1. Water tank a, 2. Tube heat exchanger a, 3. Water tank b, 4. V-shaped packing, 5. Water tank c, 6. Tube heat exchanger b, 7. Water baffle plate a, 8 .Fan a, 9. Cooling coil, 10. Fan b, 11. Water baffle b, 12. Fan c, 13. Water baffle c, 14. Compressor, 15. Evaporator, 16. Throttle valve, 17. Condenser, 18. Valve a, 19. Valve b, 20. Atomizing nozzle, 21. Natural draft cooling tower, 22. Pool, 23. Air conditioner terminal, 24. First water supply pipe, 25. First circulation Water pump, 26. secondary air inlet a, 27. second water supply pipe, 28. second circulating water pump, 29. secondary air inlet b, 30. third water supply pipe, 31. third circulating water pump, 32. Packing, 33. Hot water inlet pipe, 34. Cold water outlet pipe, 35. Water eliminator, 36. Primary air inlet a, 37. Primary air inlet b, G1. First water pipe, G2. Second water pipe, G3 . The third water pipe, G4. The fourth water pipe.
具体实施方式Detailed ways
下面结合附图和具体实施方式对本实用新型进行详细说明。The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
本实用新型结合蒸发冷却与机械制冷的发电厂冷却塔节水系统,其结构如图1所示,包括有通过管网连接的闭式蒸发冷却冷水机组、机械制冷系统及自然通风冷却塔21。The utility model combines evaporative cooling and mechanical refrigeration power plant cooling tower water-saving system. Its structure is shown in Figure 1, including a closed evaporative cooling water chiller connected through a pipe network, a mechanical refrigeration system and a natural ventilation cooling tower 21.
闭式蒸发冷却冷水机组,如图1所示,包括有机组壳体,机组壳体相对的两侧壁上分别设置有一次风进风口a36、一次风进风口b37;机组壳体内左右两侧对称设置有结构相同的第一管式间接蒸发冷却器、第二管式间接蒸发冷却器,第一管式间接蒸发冷却器与第二管式间接蒸发冷却器之间设置有直接蒸发冷却器;第一管式间接蒸发冷却器上方依次设置有挡水板c13和风机c12,第二管式间接蒸发冷却器的上方依次设置有挡水板a7和风机a8,直接蒸发冷却器的上方依次设置有挡水板b11和风机b10,风机c12、风机b10及风机a8对应的机组壳体顶壁上均设置有排风口。The closed evaporative cooling chiller, as shown in Figure 1, includes an organic unit shell, and the primary air inlet a36 and the primary air inlet b37 are respectively arranged on the opposite side walls of the unit shell; the left and right sides of the unit shell are symmetrical A first tube-type indirect evaporative cooler and a second tube-type indirect evaporative cooler with the same structure are provided, and a direct evaporative cooler is arranged between the first tube-type indirect evaporative cooler and the second tube-type indirect evaporative cooler; A water baffle c13 and a fan c12 are sequentially arranged above the first tubular indirect evaporative cooler, a water baffle a7 and a fan a8 are arranged sequentially above the second tubular indirect evaporative cooler, and a baffle is arranged sequentially above the direct evaporative cooler The water plate b11, the fan b10, the fan c12, the fan b10 and the fan a8 are all provided with air outlets on the top wall of the casing of the unit.
第一管式间接蒸发冷却器,如图1所示,包括有管式换热器a2,管式换热器a2由多根水平设置的换热管组成,管式换热器a2的上方设置有第一喷淋装置,管式换热器a2的下方设置有水箱a1,水箱a1通过第一供水管24与第一喷淋装置连通;第一供水管24上设置有第一循环水泵25。管式换热器a2与水箱a1之间形成第一风道,第一风道对应的机组壳体侧壁上设置有二次风进风口a26。The first tubular indirect evaporative cooler, as shown in Figure 1, includes a tubular heat exchanger a2, the tubular heat exchanger a2 is composed of a plurality of horizontally arranged heat exchange tubes, and the upper part of the tubular heat exchanger a2 is set There is a first spraying device, a water tank a1 is arranged under the tubular heat exchanger a2, and the water tank a1 communicates with the first spraying device through the first water supply pipe 24; the first water supply pipe 24 is provided with a first circulating water pump 25. A first air duct is formed between the tubular heat exchanger a2 and the water tank a1, and a secondary air inlet a26 is provided on the side wall of the unit housing corresponding to the first air duct.
第二管式间接蒸发冷却器,如图1所示,包括有管式换热器b6,管式换热器b6的上方设置有第二喷淋装置,管式换热器b6的下方设置有水箱c5,水箱c5通过第二供水管27与第二喷淋装置连通;第二供水管27上设置有第二循环水泵28。管式换热器b6与水箱c5之间形成第二风道,第二风道对应的机组壳体侧壁上设置有二次风进风口b29。The second tubular indirect evaporative cooler, as shown in Figure 1, includes a tubular heat exchanger b6, a second spray device is arranged above the tubular heat exchanger b6, and a second spray device is arranged below the tubular heat exchanger b6. The water tank c5 communicates with the second spraying device through the second water supply pipe 27; the second water supply pipe 27 is provided with a second circulating water pump 28. A second air passage is formed between the tubular heat exchanger b6 and the water tank c5, and a secondary air inlet b29 is provided on the side wall of the unit housing corresponding to the second air passage.
管式换热器a2、管式换热器b6由多根水平设置的换热管组成。The tubular heat exchanger a2 and the tubular heat exchanger b6 are composed of a plurality of horizontally arranged heat exchange tubes.
直接蒸发冷却器,包括有V型填料4,V型填料4的上方依次设置有冷却盘管9及第三喷淋装置,V型填料4的下方设置有水箱b3,水箱b3通过第三供水管30与第三喷淋装置连通,第三供水管30上设置有第三循环水泵31,第三循环水泵31位于水箱b3内。V型填料4与水箱b3之间形成第三风道。The direct evaporative cooler includes a V-shaped packing 4, a cooling coil 9 and a third spray device are arranged above the V-shaped packing 4, and a water tank b3 is arranged below the V-shaped packing 4, and the water tank b3 passes through the third water supply pipe 30 communicates with the third spraying device, the third water supply pipe 30 is provided with a third circulating water pump 31, and the third circulating water pump 31 is located in the water tank b3. A third air duct is formed between the V-shaped packing 4 and the water tank b3.
冷却盘管9的进水口通过第一水管G1与空调末端23的出水口连接,冷却盘管9的出水口通过第二水管G2与空调末端23的进水口连接;第二水管G2还分别与机械制冷系统、自然通风冷却塔21连接;第二水管G2上设置有阀门a18。The water inlet of the cooling coil 9 is connected to the water outlet of the air conditioner end 23 through the first water pipe G1, and the water outlet of the cooling coil 9 is connected to the water inlet of the air conditioner end 23 through the second water pipe G2; the second water pipe G2 is also connected with the mechanical The refrigeration system and the natural draft cooling tower 21 are connected; the second water pipe G2 is provided with a valve a18.
机械制冷系统,包括有压缩机14,压缩机14通过铜管依次与蒸发器15、节流阀16及冷凝器17连接构成闭合回路,蒸发器15通过第三水管G3与第二水管G2连接;第三水管G3上设置有阀门b19。The mechanical refrigeration system includes a compressor 14, the compressor 14 is sequentially connected to the evaporator 15, the throttle valve 16 and the condenser 17 through copper pipes to form a closed circuit, and the evaporator 15 is connected to the second water pipe G2 through the third water pipe G3; The third water pipe G3 is provided with a valve b19.
自然通风冷却塔21,包括有塔体,塔体的顶壁设置有排风出口,塔体内设置有填料32,填料32的上方依次设置有布水装置、收水器35及多个雾化喷嘴20,布水装置由热水进水管33及设置于热水进水管33上的多个喷嘴组成,多个喷嘴呈均匀设置;多个雾化喷嘴20通过第四水管G4与第二水管连接,第四水管G4上设置有水泵;填料32的下方设置有集水池22,集水池22连接有冷水出水管34,填料32与集水池22之间形成空气流道,空气流道对应的塔体侧壁上设置有空气入口。The natural ventilation cooling tower 21 includes a tower body, the top wall of the tower body is provided with an exhaust outlet, the tower body is provided with a packing 32, and the top of the packing 32 is sequentially provided with a water distribution device, a water eliminator 35 and a plurality of atomizing nozzles 20. The water distribution device is composed of a hot water inlet pipe 33 and a plurality of nozzles arranged on the hot water inlet pipe 33, and the plurality of nozzles are evenly arranged; a plurality of atomizing nozzles 20 are connected to the second water pipe through the fourth water pipe G4, The fourth water pipe G4 is provided with a water pump; the bottom of the filler 32 is provided with a sump 22, and the sump 22 is connected with a cold water outlet pipe 34, and an air flow channel is formed between the filler 32 and the sump 22, and the side of the tower body corresponding to the air flow channel Air inlets are provided on the walls.
本实用新型结合蒸发冷却与机械制冷的发电厂冷却塔节水系统,在第二水管G2上设置了阀门a18,在第三水管G3上设置了阀门b19,可以根据自然通风冷却塔21的冷却效率来调节二者的流量比。若自然通风冷却塔21的效率较低时,排风出口空气的干湿球温度就越高,这样就可以调节机械制冷系统冷水出口的阀门b19,使得其出水量减小,这样喷水温度就可以达到冷却塔内水蒸汽的冷凝温度。The utility model combines evaporative cooling and mechanical refrigeration in a power plant cooling tower water-saving system. A valve a18 is set on the second water pipe G2, and a valve b19 is set on the third water pipe G3. To adjust the flow ratio of the two. If the efficiency of the natural draft cooling tower 21 is low, the dry and wet bulb temperature of the exhaust air outlet air will be higher, so the valve b19 of the cold water outlet of the mechanical refrigeration system can be adjusted to reduce the water output, so that the spray water temperature will be lower. The condensation temperature of water vapor in the cooling tower can be reached.
自然通风冷却塔内,空气从空气入口进入塔体内.经空气流道穿过填料,与热水流动成相反方向流过填料,通过收水器35回收空气中的水滴后.塔体外的冷空气进入塔体内,蒸发和接触散失的热量后,温度增加,湿度变大,密度变小。因此,收水器35以上的空气经常是饱和或接近饱和状态,塔体外的空气温度低、湿度小、密度大。由于塔体内、外空气密度差异,在空气入口内外产生压差,致使塔体外空气源源不断地流进塔体内,而无需通风机械提供动力,减少了投资和能源浪费。此外,自然通风冷却塔21上部设置有多个雾化喷嘴20,可以使得细小的颗粒和水雾结合固定,然后一起落入到集水池22内。In the natural ventilation cooling tower, the air enters the tower body from the air inlet, passes through the filler through the air flow channel, flows through the filler in the opposite direction to the hot water flow, and recovers the water droplets in the air through the water eliminator 35. The cold air outside the tower After entering the tower body, after evaporating and contacting the lost heat, the temperature increases, the humidity increases, and the density decreases. Therefore, the air above the water eliminator 35 is often saturated or close to saturated, and the air outside the tower has low temperature, low humidity and high density. Due to the difference in air density inside and outside the tower, there is a pressure difference between the inside and outside of the air inlet, which causes the air outside the tower to flow into the tower continuously, without the need for ventilation machinery to provide power, reducing investment and energy waste. In addition, a plurality of atomizing nozzles 20 are arranged on the upper part of the natural draft cooling tower 21 , so that fine particles and water mist can be combined and fixed, and then fall into the sump 22 together.
本实用新型结合蒸发冷却与机械制冷的发电厂冷却塔节水系统,将蒸发冷却与机械制冷联合的冷水机组应用到电厂冷却塔的节水措施中,其工作过程如下:The utility model combines the evaporative cooling and mechanical refrigeration cooling tower water-saving system of the power plant, and applies the combined evaporative cooling and mechanical refrigeration chiller to the water-saving measures of the power plant cooling tower. The working process is as follows:
1.风系统:1. Wind system:
室外空气分别经过第一管式间接蒸发冷却器和第二管式间接蒸发冷却器冷却后,进入到直接蒸发冷却器内的V型填料4处,与水箱b3中的水进行热湿交换后,进入到冷却盘管9,与喷淋水一起冷却盘管9内的水;接着经过挡水板b11后,通过风机b10排到室外。After being cooled by the first tubular indirect evaporative cooler and the second tubular indirect evaporative cooler, the outdoor air enters the V-shaped packing 4 in the direct evaporative cooler, and exchanges heat and moisture with the water in the water tank b3. Enter the cooling coil 9, and cool the water in the coil 9 together with the spray water; then pass through the water baffle b11, and then discharge it to the outside through the fan b10.
2.水系统:2. Water system:
制冷剂经过压缩机14压缩后变成高温高压的气体后进入到冷凝器17内与外界的空气进行热交换冷却,变成低温高压的液体,再经过节流阀16后变成低温低压的液体,液体进入到蒸发器15内,与冷却盘管9内的水进行热交换,将水温降低,产生的冷水与蒸发冷却冷水机组产出的高温冷水汇合后,通过调节阀门a18和阀门b19来调节二者的流量比,以达到需要的冷水温度;产生的冷水一部分进入到自然通风冷却塔21内,将水蒸汽冷凝后一起落入到集水池22内,另一部分进入到电厂办公室的空调末端23内经过换热后再回到冷却盘管9内,如此往复循环。After being compressed by the compressor 14, the refrigerant becomes a high-temperature and high-pressure gas, then enters the condenser 17 for heat exchange and cooling with the outside air, and becomes a low-temperature and high-pressure liquid, and then passes through the throttle valve 16 to become a low-temperature and low-pressure liquid , the liquid enters the evaporator 15, exchanges heat with the water in the cooling coil 9, and lowers the water temperature. The flow ratio of the two to achieve the required cold water temperature; part of the generated cold water enters the natural draft cooling tower 21, condenses the water vapor and falls into the sump 22 together, and the other part enters the air-conditioning terminal 23 of the power plant office Return to the cooling coil 9 after heat exchange inside, so the reciprocating cycle.
本实用新型结合蒸发冷却与机械制冷的发电厂冷却塔节水系统,将蒸发冷却与机械制冷联合的冷水机组应用到冷却塔的节水措施中,一方面可以将水蒸汽冷凝后一起落回到集水池22内,减少自然通风冷却塔21的蒸发水损失;另一方面也可以降低自然通风冷却塔21的温度,使得汽轮机真空度提高,降低背压,提高热效率,节约发电煤耗。The utility model combines evaporative cooling and mechanical refrigeration with the power plant cooling tower water-saving system, and applies the combined evaporative cooling and mechanical refrigeration chiller to the water-saving measures of the cooling tower. In the sump 22, the evaporation water loss of the natural ventilation cooling tower 21 can be reduced; on the other hand, the temperature of the natural ventilation cooling tower 21 can also be reduced, so that the vacuum degree of the steam turbine is improved, the back pressure is reduced, the thermal efficiency is improved, and the coal consumption of power generation is saved.
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CN109855218A (en) * | 2019-02-25 | 2019-06-07 | 昆山台佳机电有限公司 | Integrated enclosed evaporates cooling-condensation water cooler |
CN109855219A (en) * | 2019-02-25 | 2019-06-07 | 昆山台佳机电有限公司 | Integral type based on mechanical refrigeration evaporates cooling-condensation water cooler |
CN110262578A (en) * | 2019-07-30 | 2019-09-20 | 大唐东营发电有限公司 | A kind of power generating plant cooling tower temperature control equipment |
CN110762909A (en) * | 2019-10-23 | 2020-02-07 | 西安工程大学 | Evaporative condenser precooled by indirect evaporative cooling based on dew point |
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