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WO2007121670A1 - Tour de refroidissement inoffensive pour l'environnement et économe en eau - Google Patents

Tour de refroidissement inoffensive pour l'environnement et économe en eau Download PDF

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Publication number
WO2007121670A1
WO2007121670A1 PCT/CN2007/001302 CN2007001302W WO2007121670A1 WO 2007121670 A1 WO2007121670 A1 WO 2007121670A1 CN 2007001302 W CN2007001302 W CN 2007001302W WO 2007121670 A1 WO2007121670 A1 WO 2007121670A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
cooling tower
fin
air cooler
environmentally
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/001302
Other languages
English (en)
Chinese (zh)
Inventor
Xiaomin Wu
Qi Yao
Tianmin Zhang
Wantian Dai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Original Assignee
Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN 200610076249 external-priority patent/CN1844824A/zh
Priority claimed from CNB2006100888634A external-priority patent/CN100498179C/zh
Application filed by Tsinghua University filed Critical Tsinghua University
Publication of WO2007121670A1 publication Critical patent/WO2007121670A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
    • F28C1/14—Direct-contact trickle coolers, e.g. cooling towers comprising also a non-direct contact heat exchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a cooling tower, and more particularly to an environmentally-friendly water-saving cooling tower for circulating water cooling.
  • the function of the cooling tower is to exchange the circulating water that needs to be cooled in the tower with the air, transfer the heat of the water to the air and disperse it into the atmosphere to cool the circulating water.
  • the cooling tower is divided into two types: wet cooling tower and dry cooling tower according to the way of circulating water and air.
  • a wet cooling tower In a wet cooling tower, circulating water that is spread on the surface of the packing is in direct contact with the air, and the heat of the water is transferred to the air by evaporation heat and contact heat transfer.
  • the heat exchange efficiency of the wet cooling tower is high, and the limit temperature at which the water is cooled is the wet bulb temperature of the air. Since the evaporation of the partial circulating water to reduce the temperature of the overall circulating water is the main heat exchange mode of the wet cooling tower, water loss is inevitably caused. Moreover, evaporation increases the salinity of circulating water. For this reason, the side-by-side filtration method and the sewage discharge method are often used to stabilize the water quality.
  • the sewage treatment method is widely used due to low investment and operating costs, and the treatment method is to first discharge a part.
  • the water with higher salinity is then replenished with new water to reduce the salinity of the circulating water, so the sewage method is inevitably accompanied by the loss of sewage.
  • the hot humid air at the outlet of the wet cooling tower is nearly saturated, a large amount of water mist is often present at the exit of the tower, causing light pollution to the surrounding environment and affecting the local climate.
  • the heat exchange between the circulating water and the air is carried out through the wall surface of the radiator, that is, the heat of the water in the pipe is transmitted to the air flowing outside the radiator through the wall surface of the heat exchanger, since the water does not directly contact with the air, There is no evaporation of water in the dry cooling tower, that is, there is no evaporation loss of water, and the outlet of the cooling tower is also free of water mist.
  • the cooling limit temperature of the dry cooling tower is the dry bulb temperature of the air, and the specific heat of the air is small, the heat exchange capacity is much lower than that of the wet cooling tower. Therefore, the dry cooling tower requires a large amount of materials such as metal, and the cost is much higher than that of the dry cooling tower. The same capacity wet cooling tower is high.
  • the present invention combines the advantages of a wet and dry cooling tower, and provides an anti-freeze and fog-reducing water-saving cooling tower, which aims to solve the problem of large water loss in the wet cooling tower, water mist in the tower, and ice formation in winter. And the problem of low heat exchange capacity of dry cooling towers.
  • An environmentally-friendly water-saving cooling tower The utility model comprises: a tower body, a water pool is arranged at a bottom of the tower body, a water return pipe of the circulating water which needs to be cooled is arranged on one side of the water tank, and a heat exchange packing layer is arranged above the water pool, A water distributor with a uniform distribution nozzle is disposed above the heat exchange packing layer, and a water collector is disposed above the water distributor region; and the water pool and the heat exchange packing layer are At least two lower air inlet louvers are disposed on the wall of the tower, and at least two upper air inlet louvers are disposed on the tower wall above the water collector, and an upper portion is respectively disposed adjacent to each of the upper air inlet louvers An air cooler, the water supply pipe connecting the circulating water that needs to be cooled is respectively connected to the water inlet header of each of the upper air coolers through a water distribution pipe, and the water collecting headers of the upper air cooler
  • a lower air cooler is also disposed adjacent to each of the lower air inlet louvers, and a water pipe is connected from the circulating water to the water inlet pipe to connect the water inlet headers of the lower air coolers.
  • the outlet header of each lower air cooler is connected in parallel to the water supply pipe of the water distributor through a lower water supply pipe.
  • a speed control fan is disposed at the opening of the top of the tower body.
  • the water distributor is one of an upper water distribution water distributor and a lower water distribution water distribution device.
  • the air cooler is one of a plate finned fin tube type, a spiral finned tube type and a set finned tube type, and the finned tube is one of a round tube, an elliptical tube and a porous flat tube.
  • the fins are one of a straight fin, a threaded fin, a corrugated fin, and a louvered fin.
  • a water quantity control valve is disposed on the circulating water supply pipes of the upper air cooler and the lower air cooler, respectively.
  • the invention adopts the above technical solutions, and has the following advantages: 1.
  • the invention pre-cools the circulating water by setting an air cooler, thereby reducing the cooling load of the packing section, thereby effectively reducing the circulating water in the wet cooling section.
  • the amount of evaporation can save water.
  • the present invention uses the upper air cooler to dry-cool the circulating water so that the air at the outlet of the upper air cooler becomes dry and hot, so that the hot humid air that has been heated by the filler layer can be reduced in relative humidity. And the effect of dew point temperature, which can effectively eliminate or reduce the water mist at the tower, which is conducive to environmental protection. 3.
  • the present invention pre-cools the circulating water by using the upper air cooler, correspondingly reducing the cooling load of the circulating water in the packing section, that is, reducing the evaporation of water, thereby saving water.
  • the invention is due to the water
  • a lower air cooler is arranged at the inlet louver on the tower wall between the pool and the packing layer, further increasing the cooling load of the circulating water in the air cooler, and correspondingly further reducing the amount of circulating water of the circulating water in the packing section , that is, the evaporation of water is further reduced, thereby further increasing the water saving rate. 5.
  • the preheating of the inlet air is realized while pre-cooling the circulating water, thereby preventing the freezing problem in the cold winter.
  • the opening degree of the above-mentioned air inlet louver can be adjusted, which can realize variable load operation and meet the requirements of sand prevention.
  • the control set on the bypass pipe can be used to control the circulating water flow of the packing layer to achieve maximum water saving and anti-icing.
  • the control valve set on the circulating water and down water pipe can be used to adjust the circulating water flow of the upper and lower air coolers to optimize the cooling tower running performance and variable load operation.
  • the invention combines the advantages of the two structures of the wet cooling tower and the dry cooling tower, effectively overcomes the disadvantages of the wet cooling tower or the dry cooling tower, and has the advantages of water saving, fogging environmental protection and anti-icing.
  • the invention can be widely applied to various technical fields such as petroleum, chemical, refrigeration, air conditioning and thermal power generation.
  • FIG. 1 is a schematic view showing the structure of the present invention having the function of reducing fog and water saving
  • FIG. 2 is a schematic structural view of a tube-fin type air cooler used in the present invention.
  • Figure 3 is a schematic view of the structure of the present invention having a forced ventilation function
  • FIG. 5 is a schematic structural view of the present invention having the functions of anti-freeze, fog, and water-saving forced ventilation.
  • the present invention is similar to the prior art in that it comprises: a tower body 1, a pool 2 is provided at the lowermost portion of the tower body 1, and the pool 2 is connected to a return water pipe 3 of circulating water to be cooled.
  • a heat exchange packing layer 4 is disposed above the pool 2
  • a water distributor 5 having a uniform distribution head is disposed above the heat exchange packing layer 4, and a water collecting water capable of collecting fine water droplets is disposed above the water distributor 5. 6.
  • the present invention is characterized in that at least two lower air inlet louvers 7 are provided on the side wall of the tower body 1 between the pool 2 and the heat exchange packing layer 4, and at least the side wall of the tower body 1 above the water collector 6 is provided.
  • Two upper air inlet louvers 8, each of which is placed next to each of the upper air inlet louvers 8 The upper air cooler 9 and the water trap 6 are uniformly mounted on a fixed bracket (not shown), and the fixed bracket is fixed to the load bearing support of the tower body 1.
  • each of the air coolers 9 is respectively provided with a water inlet header tank 10 and a water outlet header tank 11, and the inlet and outlet water collecting tanks 10 and 11 are respectively provided with a baffle 12, 13.
  • a plurality of fin-and-tube heat exchange tubes 14 are disposed between the inlet and outlet water collecting tanks 10 and 11, and each of the heat exchange tubes 14 is provided with a plurality of fins 15.
  • the circulating water that needs to be cooled enters from the water pipe 16, and is connected to the water inlet header 10 of each air cooler 9 through a plurality of water distribution pipes 17, and the water outlet pipe 18 and the water distributor on the water collecting header 11 of the air cooler 9.
  • the water supply pipe 19 of 5 is connected, and a bypass pipe 20 connected to the circulating water return pipe 3 is connected in parallel to the water supply pipe 19 of the water distributor 5, and the pipes of the water distributor 5, the bypass pipe 20 and the circulating water return pipe 3 are connected.
  • Control valves 21, 22 and 23 for regulating the water flow can be separately provided on the road.
  • the embodiment is basically the same as the first embodiment, and the difference is mainly that a fan 24 is disposed at the outlet of the top of the tower body 1, and the fan 24 can be driven by the variable frequency motor, so that the air in the tower can be adjusted as needed.
  • the flow rate is the same as that of the first embodiment in order to realize variable load operation and maximum water saving and energy saving.
  • this embodiment is substantially the same as the first embodiment, and the difference is as follows: a lower air cooler 9' similar to the upper air cooler 9 is also disposed adjacent to each of the lower air inlet louvers 7 respectively.
  • the lower air cooler 9' is mounted on a fixing bracket fixed on the load-bearing support of the cooling tower (not shown), and the circulating water pipe 16 is divided into two paths 16a and 16b, respectively, through the water distribution pipes 17a, 17b.
  • the water inlet header 10 connecting the upper and lower air coolers 9, 9', all the circulating water from the upper and lower air coolers 9, 9, the outlet pipes 18a, 18b of the water collecting header 11 are merged into the tube After the road 25, the water distributor 5 is connected by the water supply pipe 19 of the water distributor 5.
  • the bypass pipe 20 is disposed on the lower outlet pipe 18b to save material, and the circulating water pipes 16a and 16b are respectively provided with control valves 26a and 26b for water flow regulation.
  • this embodiment is basically the same as Embodiment 3 except that a fan 24 capable of adjusting the rotational speed is disposed at the exit of the top of the tower body 1, so that the air flow in the tower can be adjusted as needed to achieve maximum water saving. And energy saving,
  • the opening degrees of the upper and lower air inlet louvers 8 and 7 can be adjusted to achieve a negative change. Load operation and meet the requirements of sand control.
  • the water distributor 5 may adopt a structure in which water is sprayed on the water, or a structure in which water is sprayed under the water.
  • the air coolers 9, 9' may be plate finned tube type, spiral finned tube type or set finned tube type structure; the base tube is a round tube, an elliptical tube or a porous flat tube; the fin 15 is Straight fins, threaded wings, corrugated wings or louvered wings.
  • the operation process of the present invention is as follows:
  • the circulating water to be cooled is distributed to the water supply pipe 14 of each of the upper air coolers 9 into the water header tank 10 through the circulating water pipe 16 and the water distribution pipe 17.
  • the circulating water from the outlet pipe 18 of the header tank 11 is sent to the water supply pipe 19 and enters the water distributor 5, and the circulating water sprayed from the water distributor 5 is spread onto the heat exchange packing layer 4, and the water is circulated in the area of the packing layer 4.
  • the air from the upper air inlet louver 8 is heated by the circulating water in the upper air cooler 9 to become dry heat; the air from the lower air inlet louver 7 is heated and circulated by the circulating water in the packing layer 4, After the water collector 6 is recovered by the fine water droplets, it is still in a hot humid near-saturated state, and after being mixed with the dry hot air at the outlet of the upper air cooler 9, the relative humidity and the dew point temperature are both lowered, and naturally discharged from the upper opening of the tower body; The circulating water is pre-cooled using the upper air cooler 9, which correspondingly reduces the cooling load of the circulating water in the packing section 4, i.e., reduces the evaporation of water, thereby saving water.
  • the control valve 23 can be used to adjust the amount of water sprayed by the water distributor 5; the control valve 21 can regulate the flow of water from the reservoir 2 into the circulating water return pipe 3 (no longer through the next wet cooling), on the bypass pipe 20 The control valve 22 can regulate the water flow rate of the packing layer 4.
  • the circulating water supply pipe 16 is divided into two paths 16a and 16b, and one circulating water flows from the 16a through the water distribution pipe 17a into the water supply pipe 14 of the inlet header tank 10 of all the upper air coolers 9, and the other circulating water is 16b flows into the water supply pipe 14 of the inlet header tank 10 of all the lower air coolers 9' via the water distribution pipe 17b (as shown in FIG. 2), and the pre-cooled circulating water in all the upper air coolers 9 merges and passes through
  • the water outlet pipe 18a is plunged into the water distributor 5, and the pre-cooled circulating water in all the lower air coolers 9' is merged and then enters the water distributor 5 through the water supply pipe 25 connected in parallel with an outlet pipe 18b.
  • the circulating water sprayed from the water distributor 5 is spread onto the heat exchange packing layer 4, and the circulating water in the packing layer 4 is evaporatively cooled by the air introduced from the lower air inlet louver 7 through the lower air cooler, and then falls into the water tank. In 2, it is returned to the circulating water system through the circulating water return pipe 3.
  • the heat exchange process of the circulating water and air in the upper air cooler 9 and in the packing layer 4 is similar to that of Fig. 1, except that the dry cold air from the lower inlet louver 7 is in the lower air cooler 9'.
  • control valves 21, 22, 23 are similar to those of the embodiment 1, while the control valves 26a and 26b can be used to regulate the flow of water into the upper and lower air coolers to optimize the performance of the cooling tower under different loads. Maximize the water saving effect.
  • the fan 24 can be driven by the variable frequency motor, so that the forced exhaust air volume in the tower can be adjusted as needed to achieve variable load operation and maximum Water saving and energy saving.
  • the invention combines the advantages of two structural forms of a wet cooling tower and a dry cooling tower, and has the advantages of water saving, fogging environmental protection and anti-icing.
  • the invention can be widely applied to various technical fields such as petroleum, chemical, refrigeration, air conditioning and thermal power generation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne une tour de refroidissement inoffensive pour l'environnement et économe en eau comprenant un corps de la tour (1). Une cuve à eau (2) installée au fond du corps de la tour (1) est raccordée à une conduite de retour (3) servant au refroidissement de l'eau. Une couche de remplissage par échange thermique (4) est installée au-dessus de la cuve à eau (2); un collecteur de distribution d'eau (5) est installé au-dessus de la couche de remplissage par échange thermique (4); et un éliminateur d'eau (6) est installé au-dessus du collecteur de distribution d'eau (5). Au moins deux louvres inférieurs d'admission d'air (7) sont installés au niveau du blindage de la tour, entre la cuve à eau (2) et la couche de remplissage par échange thermique (4); et au moins deux louvres supérieurs d'admission d'air (8) sont installés au niveau du blindage de la tour, au-dessus des éliminateurs d'eau (6). Un refroidisseur d'air (9, 9') est installé à proximité de chaque louvre d'admission d'air (7, 8). L'eau à refroidir est prérefroidie dans le refroidisseur d'air (9, 9'), puis s'écoule à l'intérieur du collecteur de distribution d'eau (5).
PCT/CN2007/001302 2006-04-21 2007-04-20 Tour de refroidissement inoffensive pour l'environnement et économe en eau Ceased WO2007121670A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN 200610076249 CN1844824A (zh) 2006-04-21 2006-04-21 一种环保节水型冷却塔
CN200610076249.6 2006-04-21
CN200610088863.4 2006-07-21
CNB2006100888634A CN100498179C (zh) 2006-07-21 2006-07-21 一种防冻降雾节水型冷却塔

Publications (1)

Publication Number Publication Date
WO2007121670A1 true WO2007121670A1 (fr) 2007-11-01

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Application Number Title Priority Date Filing Date
PCT/CN2007/001302 Ceased WO2007121670A1 (fr) 2006-04-21 2007-04-20 Tour de refroidissement inoffensive pour l'environnement et économe en eau

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WO (1) WO2007121670A1 (fr)

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CN101865614A (zh) * 2010-06-19 2010-10-20 上虞市联冷玻璃钢有限公司 梯级进风喷雾高效冷却塔
DE102012214444A1 (de) * 2012-08-14 2014-02-20 Siemens Aktiengesellschaft Gas- und Dampfturbinenanlage mit Naturzugkühlturm
EP2369283A3 (fr) * 2010-03-22 2015-07-22 SPX Cooling Technologies Inc. Appareil et procédé pour système de dérivation d'air de tour de refroidissement à tirage naturel
CN107364915A (zh) * 2016-05-13 2017-11-21 江苏瑞盛水处理有限公司 一种新型氨吹脱塔
CN107883785A (zh) * 2016-09-29 2018-04-06 内蒙古乌海化工有限公司 循环水冷却系统
CN108917421A (zh) * 2018-08-07 2018-11-30 德州贝泰制冷设备有限公司 一种节水环保型冷却塔
CN109775790A (zh) * 2019-03-19 2019-05-21 上海玖矢企业管理有限公司 一种开式循环水和闭式循环水混联型设备
CN109883250A (zh) * 2019-04-03 2019-06-14 广东览讯科技开发有限公司 一种冷却塔化冰装置系统
CN109990625A (zh) * 2019-04-28 2019-07-09 洛阳鼎瑞节能科技有限公司 一种智控紧凑型干湿联合蒸发式空冷器
CN109990620A (zh) * 2019-03-28 2019-07-09 广东览讯科技开发有限公司 一种风机冷却系统分离式冷却塔
CN110057206A (zh) * 2019-05-13 2019-07-26 广东览讯科技开发有限公司 一种无填料喷雾冷却塔
CN110195986A (zh) * 2019-07-02 2019-09-03 新疆博纳格材料科技有限公司 一种用于电厂节水消白余热及水回收系统
WO2019220016A1 (fr) * 2018-05-17 2019-11-21 Tm System Finland Oy Agencement et procédé permettant de conditionner de l'air d'échappement humide
CN110553518A (zh) * 2019-08-27 2019-12-10 中山大学 一种用于冷却塔的仿生凝水装置
CN111121485A (zh) * 2020-01-09 2020-05-08 金先培 一种冷却塔节水设备
CN111457756A (zh) * 2019-12-25 2020-07-28 北京中标新亚节能工程股份有限公司 开式冷却塔及冷却装置
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CN112129123A (zh) * 2020-09-07 2020-12-25 中国科学院广州能源研究所 一种宽温区负压露点蒸发冷却塔及其运行控制方法
CN112225280A (zh) * 2020-10-26 2021-01-15 中国电力工程顾问集团中南电力设计院有限公司 一种脱硫废水进间接空冷塔内强化蒸发减量系统
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CN114136118A (zh) * 2021-12-21 2022-03-04 广东览讯科技开发有限公司 干湿式节水消雾冷却塔
CN114322599A (zh) * 2021-12-24 2022-04-12 益冷和众科技(北京)有限公司 一种基于冷却塔的预冷装置及冷却塔
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CN115451724A (zh) * 2022-09-05 2022-12-09 中星乾景数据技术(北京)有限公司 一种冷却循环水系统及其优化方法
CN116659259A (zh) * 2023-06-15 2023-08-29 内蒙古京宁热电有限责任公司 一种自然通风的干湿联合冷却塔及通风方法
CN117870404A (zh) * 2023-03-25 2024-04-12 江西方舟流体科技有限公司 一种冷却塔消白换热模块
CN120333187A (zh) * 2025-06-19 2025-07-18 隆华科技集团（洛阳）股份有限公司 一种带尖峰装置的复合型混流式空冷器

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Cited By (40)

* Cited by examiner, † Cited by third party
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EP2369283A3 (fr) * 2010-03-22 2015-07-22 SPX Cooling Technologies Inc. Appareil et procédé pour système de dérivation d'air de tour de refroidissement à tirage naturel
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