JP6718718B2 - Cooling tower chemical addition unit, cooling tower equipped with cooling tower chemical addition unit, and method for preventing freezing of cooling tower chemical - Google Patents
Cooling tower chemical addition unit, cooling tower equipped with cooling tower chemical addition unit, and method for preventing freezing of cooling tower chemical Download PDFInfo
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- 239000000126 substance Substances 0.000 title claims description 246
- 238000001816 cooling Methods 0.000 title claims description 161
- 238000007710 freezing Methods 0.000 title claims description 21
- 230000008014 freezing Effects 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 197
- 239000007788 liquid Substances 0.000 claims description 142
- 238000009423 ventilation Methods 0.000 claims description 19
- 239000003814 drug Substances 0.000 claims description 9
- 229940079593 drug Drugs 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 6
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
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- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
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- 239000007921 spray Substances 0.000 description 2
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Description
本発明は、冷凍機、冷温水機、空調機、各種工程の熱交換器などに冷却水を循環水として供給する冷却塔に備えられ、冷却水の循環水系に薬液を添加する冷却塔用薬液添加ユニット、冷却塔用薬液添加ユニットを備えた冷却塔及び冷却塔用薬液の凍結防止方法に関する。 INDUSTRIAL APPLICABILITY The present invention is provided in a cooling tower that supplies cooling water as circulating water to a refrigerator, a chiller/heater, an air conditioner, a heat exchanger of various processes, etc., and a cooling tower chemical liquid for adding a chemical liquid to the circulating water system of the cooling water. The present invention relates to a cooling tower equipped with an addition unit and a cooling tower chemical solution addition unit, and a method for preventing freezing of a cooling tower chemical solution.
冷却塔の循環水系には、金属腐食やスケール付着の防止、スライムや微生物の発生や繁殖防止等のために各種の水処理用薬液を使用する。 In the circulating water system of the cooling tower, various chemicals for water treatment are used to prevent metal corrosion and scale adhesion, and to prevent slime and microorganisms from generating and breeding.
一般的に、冷却塔は屋外に設置される。そのため、外気温度が低下する時期に冷凍倉庫に設置されている冷凍機を運転する場合やフリークーリングで冷水を製造する場合などで、特に寒冷地で冬季に冷却塔を作動させると、循環水の凍結や、散布水の過冷却による散布水の凍結により、冷却塔や配管が破損するおそれがある。更に、冷却塔に供給する水処理用薬液を蓄える薬液タンクも、一般的に冷却塔外部に設置されているために薬液が冬場に凍結することがある。薬液の凍結により循環水系に薬液が供給できなくなったり、薬液の一部が凍結したり、薬剤の成分が析出した場合には薬液濃度が不均一になって循環水系における設定濃度からかけ離れたりするため、濃度制御が不能となることにより金属腐食やスケール、スライムが発生して回復に多大な手間と時間を要することになる。 Generally, the cooling tower is installed outdoors. Therefore, when operating the refrigerator installed in the freezer warehouse when the outside air temperature decreases or when producing cold water by free cooling, when the cooling tower is operated in winter, especially in cold regions, circulating water There is a risk of damage to the cooling tower and piping due to freezing and spray water freezing due to overcooling of the spray water. Further, since the chemical solution tank for storing the chemical solution for water treatment supplied to the cooling tower is generally installed outside the cooling tower, the chemical solution may freeze in winter. Because the drug solution cannot be supplied to the circulating water system due to freezing of the drug solution, a part of the drug solution freezes, and when the drug components deposit, the drug solution concentration becomes non-uniform and deviates from the set value in the circulating water system. Since the concentration control becomes impossible, metal corrosion, scale, and slime are generated, which requires a great deal of time and effort for recovery.
冷却塔の循環水や散水の凍結を防止する技術については各種開示されている（例えば、特許文献１、２、３）。しかしながら、冷却塔用薬液の凍結や薬剤の析出を防止する技術や手段については開示がなく、簡便で有効な薬液の凍結防止方法が要望されていた。 Various techniques have been disclosed for preventing freezing of circulating water and sprinkling water in a cooling tower (for example, Patent Documents 1, 2, and 3). However, there is no disclosure of a technique or means for preventing the freezing of the cooling tower chemical solution and the precipitation of the chemical, and a simple and effective method for preventing the chemical solution from freezing has been demanded.
本発明は、上記した問題点を改善する、すなわち、冬場であっても冷却塔用薬液の凍結や薬剤の析出が発生しにくく、薬液供給が容易に行える薬液添加ユニット、及び薬液凍結防止方法を提供することを目的とする。 The present invention improves the above-mentioned problems, that is, even in the winter, the cooling liquid for the cooling tower is unlikely to freeze or the precipitation of the drug is unlikely to occur, and the chemical liquid feeding unit capable of easily supplying the chemical liquid, and the chemical liquid anti-freezing method. The purpose is to provide.
本発明の冷却塔用薬液添加ユニットは、請求項１に記載の通り、上部にファン、および散布用の循環水を溜める散水部、下部に循環水を溜める下部水槽、側面に外部から空気を導入する通気部、該散水部から散布された循環水と該通気部から内部に導入された空気とを接触させる水冷却部、及び、該ファン下方で、かつ、該下部水槽上方に該水冷却部からの空気を該ファンに導くための通風空間を有する冷却塔に備えられた冷却塔用薬液添加ユニットであって、
該冷却塔用薬液添加ユニットが冷却塔の外壁の外部に位置するコントロール部、該通風空間に位置する薬液タンク、及び該薬液タンク内の薬液を昇温する手段を有していることを特徴とする冷却塔用薬液添加ユニットである。
The chemical liquid adding unit for a cooling tower of the present invention is, as described in claim 1, a fan in the upper part, a sprinkler part for collecting circulating water for spraying, a lower water tank for storing circulating water in the lower part, and introducing air from the outside to the side surface. Ventilation part, a water cooling part for bringing circulating water sprayed from the sprinkling part into contact with the air introduced from the ventilation part, and the water cooling part below the fan and above the lower water tank. A cooling tower chemical liquid addition unit provided in a cooling tower having a ventilation space for guiding air from the fan to the fan,
The cooling tower chemical solution adding unit has a control section located outside the outer wall of the cooling tower, a chemical solution tank located in the ventilation space, and means for raising the temperature of the chemical solution in the chemical solution tank. Is a cooling tower chemical liquid adding unit.
本発明の冷却塔用薬液添加ユニットは、請求項１に記載の通り、前記薬液を昇温する手段が、前記薬液タンク内に設置された配管に前記循環水を通水する手段であることを特徴とする冷却塔用薬液添加ユニットである。 In the cooling tower chemical liquid addition unit of the present invention, as described in claim 1 , the means for raising the temperature of the chemical liquid is a means for passing the circulating water through a pipe installed in the chemical liquid tank. It is a characteristic chemical addition unit for a cooling tower .
本発明の冷却塔用薬液添加ユニットは、請求項２に記載の通り、前記薬液タンク内に設置された配管に循環水を通水する手段が、冷却塔の下部水槽の循環水をポンプにより配管に送水する手段であることを特徴とする請求項１に記載の冷却塔用薬液添加ユニットである。 In the chemical liquid adding unit for a cooling tower of the present invention, as described in claim 2 , the means for passing the circulating water through the pipe installed in the chemical liquid tank is such that the circulating water in the lower water tank of the cooling tower is piped by a pump. The chemical liquid adding unit for a cooling tower according to claim 1 , which is a means for sending water to the cooling tower.
本発明の冷却塔用薬液添加ユニットは、請求項３に記載の通り、前記薬液タンク内に設置された配管に循環水を通水する手段が、冷却対象の負荷部から冷却塔に戻る循環水ラインから分岐した取り出し配管より取水された循環水を通水する手段であることを特徴とする請求項１に記載の冷却塔用薬液添加ユニットである。 In the chemical liquid adding unit for a cooling tower of the present invention, as described in claim 3 , the means for passing the circulating water through the pipe installed in the chemical liquid tank is the circulating water returning from the load part to be cooled to the cooling tower. The chemical liquid adding unit for a cooling tower according to claim 1 , which is means for passing circulating water taken from a take-out pipe branched from the line.
本発明の冷却塔用薬液添加ユニットは、請求項４に記載の通り、前記薬液タンク内に設置された配管に循環水を通水する手段が、冷却塔上部に設置された散水部の循環水を取水する装置または散布された散布水を取水する装置により取水された循環水を通水する手段であることを特徴とする請求項１に記載の冷却塔用薬液添加ユニットである。 In the chemical addition unit for a cooling tower of the present invention, as described in claim 4 , the means for passing the circulating water through the pipe installed in the chemical tank is the circulating water of the sprinkler installed at the upper part of the cooling tower. The chemical liquid adding unit for a cooling tower according to claim 1 , which is means for passing circulating water taken in by a device for taking in water or a device for taking in sprayed sprayed water.
本発明の冷却塔用薬液添加ユニットは、前記薬液を昇温する手段が、前記薬液タンクの少なくとも一部を下部水槽の循環水に浸す手段であることを特徴とする冷却塔用薬液添加ユニットである。 Cooling towers for chemical addition unit of the present invention, means for heating the said chemical solution, in the cooling tower for chemical additives unit, characterized in that at least a portion of the chemical tank is means immersed in the circulating water in the lower water bath is there.
本発明の冷却塔用薬液添加ユニットは、請求項１に記載の通り、前記薬液を昇温する手段が、前記薬液タンクに取り付けられた熱伝導性部材の少なくとも一部を下部水槽の循環水に浸す手段であることを特徴とする冷却塔用薬液添加ユニッである。 In the chemical addition unit for a cooling tower of the present invention, as described in claim 1 , the means for raising the temperature of the chemical is such that at least a part of the heat conductive member attached to the chemical tank is circulated in the lower water tank. It is a unit for adding a chemical liquid for a cooling tower, which is a means for soaking.
本発明の冷却塔用薬液添加ユニットは、請求項５に記載の通り、熱伝導性部材が、薬液タンクと独立して一体化して取り付けられ、該熱伝導性部材と薬液タンクとは取り付けと取り外しが容易な、着脱可能な構造有していることを特徴とする請求項１に記載の冷却塔用薬液添加ユニットである。 Cooling towers for chemical addition unit of the present invention, as described in claim 5, the thermally conductive member is mounted integrally independently of the chemical tank, installation and removal from the thermally conductive member and the liquid tank The chemical solution addition unit for a cooling tower according to claim 1, wherein the chemical solution addition unit for a cooling tower has an easily removable structure.
本発明の熱伝導性部材としては、銅、アルミニウム、鉄等の金属材料の他、セラミックスの一種である酸化アルミニウム、窒化ホウ素、窒化アルミニウムや黒鉛等の無機材料が使用される。その他、熱伝導性を具備した樹脂部材として、プラスチック等の高分子材料に溶融シリカ、酸化アルミニウム、六方晶窒化ホウ素、酸化マグネシウム、窒化アルミニウム等のフィラーを配合した部材が使用可能である。 As the heat conductive member of the present invention, in addition to metallic materials such as copper, aluminum and iron, inorganic materials such as aluminum oxide, boron nitride, aluminum nitride and graphite which are one of ceramics are used. In addition, as a resin member having thermal conductivity, a member in which a filler such as fused silica, aluminum oxide, hexagonal boron nitride, magnesium oxide, or aluminum nitride is mixed with a polymer material such as plastic can be used.
熱伝導性部材と薬液タンクとが容易に取り付けと取り外しが可能な、着脱可能な構造とは、例えば両者の表面の一部に凹部と凸部を設け、お互いを嵌め合せ可能とした構造や、ボルトとナット等により両者の面同士が密着して一体化可能となる構造等であり、熱伝導性部材と薬液タンクとを熱伝導性が高い状態での取り付けが容易に行え、取り外しも容易となる。 The heat conductive member and the chemical liquid tank can be easily attached and detached, and the detachable structure means, for example, a structure in which a concave portion and a convex portion are provided on a part of the surface of both members, and which can be fitted to each other, It has a structure such that the surfaces of both can be brought into close contact with each other by bolts and nuts so that they can be integrated, and the heat conductive member and the chemical liquid tank can be easily attached in a high heat conductive state, and can be easily removed. Become.
本発明の冷却塔用薬液添加ユニットは、請求項６に記載の通り、前記薬液タンクの底部に薬液を排出する開閉バルブが設けられており、該開閉バルブを開にして薬液を下部水槽に滴下することを特徴とする請求項１〜５の何れか１項に記載の冷却塔用薬液添加ユニットである。 As described in claim 6 , the cooling tower chemical liquid adding unit of the present invention is provided with an opening/closing valve for discharging the chemical liquid at the bottom of the chemical liquid tank. The opening/closing valve is opened to drop the chemical liquid into the lower water tank. a cooling tower for chemical addition unit according to any one of claim 1 to 5, characterized in that.
本発明の冷却塔用薬液添加ユニットは、請求項７に記載の通り、前記開閉バルブには薬液タンク側の薬液内に沈められたホースが取り付けられていることを特徴とする請求項６に記載の冷却塔用薬液添加ユニットである。 Cooling towers for chemical addition unit of the present invention, as described in claim 7, claim 6, characterized in that the said opening and closing valve is attached hose submerged in liquid chemical of the chemical tank Is a chemical addition unit for a cooling tower.
本発明の冷却塔用薬液添加ユニットは、請求項８に記載の通り、前記薬液タンク内に設置された循環水を通水する配管にエゼクターと自動開閉バルブが設けられており、エゼクターを作動させて薬液を循環水に注入することを特徴とする請求項１〜４の何れか１項に記載の冷却塔用薬液添加ユニットである As described in claim 8 , the cooling tower chemical liquid adding unit of the present invention is provided with an ejector and an automatic opening/closing valve in a pipe for circulating water installed in the chemical liquid tank to operate the ejector. The chemical solution is injected into the circulating water by means of the chemical solution adding unit for a cooling tower according to any one of claims 1 to 5.
本発明の冷却塔は、請求項９に記載の通り、請求項３に記載の冷却塔用薬液添加ユニットを備えた冷却塔であって、冷却対象の負荷部から冷却塔に戻る循環水ラインの少なくとも一部が冷却塔の内部に設置されており、該内部に設置された循環水ラインには分岐した取り出し配管、または取り出し配管を接続するためのノズルがあらかじめ設けられていることを特徴とする冷却塔である。 The cooling tower of the present invention is, as described in claim 9 , a cooling tower provided with the chemical liquid adding unit for a cooling tower according to claim 3 , which is a circulating water line returning from a load part to be cooled to the cooling tower. At least a part is installed inside the cooling tower, and the circulating water line installed inside is provided with a branched take-out pipe or a nozzle for connecting the take-out pipe in advance. It is a cooling tower.
本発明の冷却塔は、請求項１０に記載の通り、請求項１〜８の何れか１項に記載の冷却塔用薬液添加ユニットを備えた冷却塔、または請求項９に記載の冷却塔であって、冷却塔の下部水槽にヒータが設置されていることを特徴とする冷却塔である。 The cooling tower of the present invention is, as described in claim 10 , a cooling tower including the chemical addition unit for a cooling tower according to any one of claims 1 to 8 , or the cooling tower according to claim 9. In this cooling tower, a heater is installed in the lower water tank of the cooling tower.
本発明の冷却塔用薬液の凍結防止方法は、請求項１１に記載の通り、請求項１〜８の何れか１項に記載の冷却塔用薬液添加ユニット、請求項９または請求項１０に記載の冷却塔により、冷却塔用薬液の凍結を防止することを特徴とする冷却塔用薬液の凍結防止方法である。 Antifreezing method of cooling towers for chemical present invention, as described in claim 11, the cooling tower for chemical addition unit according to any one of claims 1-8, claim 9 or claim 10 The method for preventing chemicals for a cooling tower from freezing is provided by the above cooling tower.
本発明の冷却塔用薬液添加ユニットによれば、冬場であっても冷却塔用薬液が凍結したり薬剤が析出したりする心配がなく、容易に薬液制御が可能な薬液添加ユニット及び冷却塔が得られる。 According to the chemical liquid adding unit for a cooling tower of the present invention, there is no concern that the chemical liquid for the cooling tower may be frozen or the chemical may be deposited even in the winter, and the chemical liquid adding unit and the cooling tower can easily control the chemical liquid. can get.
本発明は、上部にファン、下部に循環水を溜める下部水槽、側面に外部から空気を導入する通気部、該通気部から内部に導入された空気と循環水とを接触させる水冷却部、及び、該ファン下方で、かつ、該下部水槽上方に該水冷却部からの空気を該ファンに導くための通風空間を有する冷却塔に備えられた冷却塔用薬液添加ユニットであって、外部に位置するコントロール部、前記通風空間に位置する薬液タンク、及び薬液タンク内の薬液を昇温する手段を有し、必要により該薬液タンク内の薬液を循環水系に添加するための薬液ポンプを備えていることを特徴とする冷却塔用薬液添加ユニットであり、この薬液添加ユニットにより、冬場での薬液の凍結が防止でき、薬液制御が容易に行える。 The present invention includes a fan in an upper portion, a lower water tank for storing circulating water in a lower portion, a ventilation portion for introducing air from the outside into a side surface, a water cooling portion for contacting the air introduced into the inside from the ventilation portion with circulating water, and A cooling tower chemical liquid addition unit provided in a cooling tower having a ventilation space for guiding the air from the water cooling section to the fan below the fan and above the lower water tank, and is located outside A control unit, a chemical liquid tank located in the ventilation space, and means for raising the temperature of the chemical liquid in the chemical liquid tank, and if necessary, a chemical liquid pump for adding the chemical liquid in the chemical liquid tank to the circulating water system. The chemical solution adding unit for a cooling tower is characterized in that the chemical solution adding unit can prevent freezing of the chemical solution in the winter and facilitate control of the chemical solution.
図１に、本発明に係る冷却塔についての模式図を示す。図１（ａ）は正面から見た、薬液タンク５を含む断面での断面図、図１（ｂ）は薬液タンク５を含む断面での冷却塔１右方から見た断面図である。冷却塔１は、上部にファン２ｂ、循環水を散布するための散水部２ｆ、下部に下部水槽２ｃ、側面に外部から空気を導入する通気部２ｈ、該通気部２ｈ内側に該通気部２ｈから内部に導入された空気と散布水とを接触させる水冷却部２ｄ、及び、該ファン２ｂ下方で、かつ、該下部水槽２ｃ上方に該水冷却部２ｄからの空気を該ファン２ｂに導くための通風空間２ｇを有し、冷却塔１の外壁３の外部に位置するコントロール部７と通風空間２ｇに位置する薬液タンク５、及び薬液タンク５内の薬液を昇温する手段を有し、必要により薬液タンク５内の薬液を冷却水系に添加するために設置される薬液ポンプ（図示省略）とから構成されている冷却塔用薬液添加ユニット１１を備えている。 FIG. 1 shows a schematic view of a cooling tower according to the present invention. 1A is a cross-sectional view of a cross section including the chemical liquid tank 5 as viewed from the front, and FIG. 1B is a cross-sectional view of the cross section including the chemical liquid tank 5 as viewed from the right side of the cooling tower 1. The cooling tower 1 includes a fan 2b on the upper part, a water sprinkling part 2f for sprinkling circulating water, a lower water tank 2c on the lower part, a ventilation part 2h for introducing air from the outside to the side surface, and the ventilation part 2h on the inside of the ventilation part 2h. For guiding the air from the water cooling section 2d to the fan 2b below the fan 2b and above the lower water tank 2c, and the water cooling section 2d that makes the air introduced into contact with the sprayed water. It has a ventilation space 2g, a control unit 7 located outside the outer wall 3 of the cooling tower 1, a chemical solution tank 5 located in the ventilation space 2g, and a means for raising the temperature of the chemical solution in the chemical solution tank 5, if necessary. A cooling tower chemical solution addition unit 11 including a chemical solution pump (not shown) installed to add the chemical solution in the chemical solution tank 5 to the cooling water system is provided.
図２（ａ）〜図２（ｃ）は循環水を通す配管９を内部に設置した薬液タンク５、薬液ポンプ６及び水質検査手段のコントロール部７がユニット化された冷却塔用薬液添加ユニット１１の例を示す図であり、図２（ａ）は上面図、図２（ｂ）は図２（ａ）のＬＬにおける断面図、図２（ｃ）は正面図である。 2(a) to 2(c), a chemical liquid tank 5 having a pipe 9 for passing circulating water therein, a chemical liquid pump 6, and a control unit 7 of a water quality inspection unit are unitized into a cooling tower chemical liquid addition unit 11 2(a) is a top view, FIG. 2(b) is a cross-sectional view taken along line LL of FIG. 2(a), and FIG. 2(c) is a front view.
本発明における薬液タンクは、薬液の種類によりポリエチレン、ポリプロピレン、ポリ塩化ビニル、ポリエチレンテレフタレート等のポリマー製が使用されるが、これらに限定されない。 The chemical liquid tank in the present invention is made of a polymer such as polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, depending on the type of chemical liquid, but is not limited thereto.
本発明の薬液を昇温する手段が、薬液タンク内に設置された配管に循環水を通水する手段による場合、配管の材料は熱伝導性の低いポリエチレン、ポリ塩化ビニル等のポリマーでも長時間の通水により薬液の昇温は可能であるが、短時間の通水で昇温が可能である熱伝導性が高い金属が好ましく、使用する薬液による腐食性を考慮してステンレス、銅、アルミニウム、鉄等から選択される。 When the means for raising the temperature of the chemical liquid of the present invention is a means for passing circulating water through the pipe installed in the chemical liquid tank, the material of the pipe is polyethylene having a low thermal conductivity, or a polymer such as polyvinyl chloride for a long time. Although it is possible to raise the temperature of the chemical solution by passing water, it is preferable to use a metal with high thermal conductivity that can raise the temperature by passing water for a short time. Considering the corrosiveness of the chemical solution used, stainless steel, copper, aluminum , Iron, etc.
薬液タンクの配管に循環水を通水する手段が、図３のように冷却塔の下部水槽２ｃの循環水２ｉをポンプ９ａにより配管９に送水する場合には、本発明では冷却塔１ａ内部に薬液タンク５が設けられていることから送水距離が短く、特に下部水槽２ｃの循環水２ｉがヒータ等により保温されている場合には簡単な装置により薬液の昇温効果が得られる。 When the means for passing the circulating water through the pipe of the chemical liquid tank sends the circulating water 2i of the lower water tank 2c of the cooling tower to the pipe 9 by the pump 9a as shown in FIG. Since the chemical liquid tank 5 is provided, the water supply distance is short, and particularly when the circulating water 2i in the lower water tank 2c is kept warm by a heater or the like, the temperature raising effect of the chemical liquid can be obtained by a simple device.
薬液タンクの配管に循環水を通水する手段が、図４のように冷却対象の負荷部２ｋ（熱交換器）から冷却塔１ｂに戻る循環水ライン２ｍから取水して配管９に送水する場合、負荷部２ｋに向かう循環水に比べて負荷部２ｋから戻る循環水のほうが熱源である負荷部２ｋ部から得た熱により昇温していること、および追加のポンプ設置が不要であることから好ましい。図４の場合では、循環水ライン２ｍの少なくとも一部が冷却塔１ｂの内部を通るように設けられ、内部の循環水ライン２ｍから取水して薬液タンク５内の配管９に通水しており、冷却塔の外部の循環水ラインに取水管を接続するよりも内部の循環水ラインに接続するほうが取水管の設置が容易であることより好ましいが、図１１のように循環水ライン２ｐが冷却塔１ｈの外部だけを通るように設けられ、この外部の循環水ライン２ｐから取水して薬液タンク５内の配管９に通水してもよい。循環水ライン２ｍに分岐した取り出し配管９ｂまたはノズルを設ける場合であって、冷却塔１ｂ内に循環水ライン２ｍが設けられている場合には、冷却塔１ｂを設置する前にあらかじめ冷却塔１ｂ内の循環水ライン２ｍに配管９、取り出し配管９ｂやノズルを設けておくことが好ましい。また、冷却塔１ｂが停止する場合も考慮して循環水による手段に加えて他の薬液昇温手段も併用可能とすることが好ましい。 When the means for passing the circulating water through the pipe of the chemical liquid tank draws water from the circulating water line 2m returning from the load part 2k (heat exchanger) to be cooled to the cooling tower 1b as shown in FIG. Since the circulating water returning from the load section 2k is heated by the heat obtained from the load section 2k, which is a heat source, as compared with the circulating water heading to the load section 2k, and it is not necessary to install an additional pump. preferable. In the case of FIG. 4, at least a part of the circulating water line 2m is provided so as to pass through the inside of the cooling tower 1b, and the water is taken from the circulating water line 2m inside and passed through the pipe 9 in the chemical liquid tank 5. It is preferable to connect the intake pipe to the internal circulation water line rather than to connect the intake pipe to the external circulation water line outside the cooling tower, because it is easier to install the intake pipe, but as shown in FIG. 11, the circulation water line 2p is cooled. It may be provided so as to pass only through the outside of the tower 1h, and water may be taken from the circulating water line 2p outside this and passed through the pipe 9 in the chemical liquid tank 5. In the case where the take-out pipe 9b or the nozzle branched to the circulating water line 2m is provided and the circulating water line 2m is provided in the cooling tower 1b, the inside of the cooling tower 1b is previously installed before the cooling tower 1b is installed. It is preferable that the circulating water line 2m is provided with a pipe 9, a take-out pipe 9b and a nozzle. Further, in consideration of the case where the cooling tower 1b is stopped, it is preferable to be able to use other chemical liquid temperature raising means in addition to the means using circulating water.
薬液タンクの配管に循環水を通水する手段が、図５のように冷却塔１ｃ上部の散水部２ｆに溜まった循環水または散布時の散布水から取水する装置２ｎにより取水された循環水を用いることも可能である。 As shown in FIG. 5, the means for passing the circulating water through the pipe of the chemical liquid tank is to collect the circulating water collected in the sprinkling portion 2f at the upper part of the cooling tower 1c or the circulating water taken by the device 2n for taking in the sprinkling water at the time of spraying. It is also possible to use.
本発明の薬液を昇温する手段が、図６のように、少なくとも薬液タンクの一部５ｆを下部水槽２ｃの循環水２ｉに浸すことによる場合は、薬液タンクの材質として熱伝導性の高い材質が好ましいが、薬液タンクを継続的に循環水に浸しておくことにより薬液タンクの材質が熱伝導性の低いポリエチレン、ポリ塩化ビニル等のポリマーでも昇温効果が得られる。薬液を短時間で昇温させたい場合には、図７のように薬液タンク５に熱伝導性が高い材質の部材（熱伝導性部材５ｇ）を熱が伝わりやすいように密着させて接続し、その部材の少なくとも一部を下部水槽２ｃの循環水２ｉに浸すことにより、循環水２ｉの熱が薬液に効率的に伝導されるので好ましい。熱伝導性部材５ｇとしては、金属が好ましく、銅、アルミニウム、鉄等が用いられ、部材の形状は、循環水２ｉと接する表面積を高めるためにフィン状が好ましい。 When the means for raising the temperature of the chemical solution of the present invention is, as shown in FIG. 6, by immersing at least a part 5f of the chemical solution tank in the circulating water 2i of the lower water tank 2c, a material having a high thermal conductivity as the material of the chemical solution tank. However, by continuously immersing the chemical liquid tank in the circulating water, the temperature increasing effect can be obtained even if the chemical liquid tank is made of a polymer having low thermal conductivity such as polyethylene or polyvinyl chloride. When it is desired to raise the temperature of the chemical liquid in a short time, as shown in FIG. 7, a member (heat conductive member 5g) made of a material having high thermal conductivity is closely attached to the chemical liquid tank 5 so as to easily transfer heat, By soaking at least a part of the member in the circulating water 2i in the lower water tank 2c, the heat of the circulating water 2i is efficiently conducted to the chemical liquid, which is preferable. As the heat conductive member 5g, a metal is preferable, and copper, aluminum, iron or the like is used, and the shape of the member is preferably a fin shape in order to increase the surface area in contact with the circulating water 2i.
本発明は、例えば図８のように、冷却塔１ｆの外壁３の内面部に熱伝導性部材５ｈが一体化して取り付けられ、この熱伝導性部材５ｈと薬液タンク５とが容易に取り付けと取り外し可能な、着脱可能な構造となっており、熱伝導性部材５ｈの少なくとも一部を冷却塔の下部水槽２ｃの循環水２ｉに浸漬することにより下部水槽２ｃの循環水２ｉの熱が薬液タンク５内の薬液に移動する。熱伝導性部材５ｈと薬液タンク５の取り付けと取り外しが容易な、着脱可能な構造とは、例えば両者の表面の一部に凹部と凸部を設け、お互いを嵌め合せ可能とした構造や、ボルトとナット等により両者の面同士を密着させて一体化が容易に行える構造である。 In the present invention, for example, as shown in FIG. 8, a heat conductive member 5h is integrally attached to the inner surface portion of the outer wall 3 of the cooling tower 1f, and the heat conductive member 5h and the chemical liquid tank 5 are easily attached and detached. The heat-conductive member 5h has a removable structure, and at least a part of the heat-conductive member 5h is immersed in the circulating water 2i in the lower water tank 2c of the cooling tower, whereby the heat of the circulating water 2i in the lower water tank 2c is transferred to the chemical tank 5. Move to the drug solution inside. The detachable structure in which the heat conductive member 5h and the chemical liquid tank 5 can be easily attached and detached is, for example, a structure in which a concave portion and a convex portion are provided on a part of the surfaces of both members, and which can be fitted with each other, or a bolt. It is a structure in which both surfaces are brought into close contact with each other by means of a nut and the like to facilitate integration.
本発明で、冷却塔用薬液添加ユニットから薬液を循環水に添加する方法としては、図９のように薬液タンク５の底部に開閉バルブ５ｉを設け、その開閉バルブ５ｉを開にして薬液を下部水槽２ｃに滴下する例、更に、図１０のように、開閉バルブ５ｉに薬液タンク５の薬液内に沈められたホース５ｋを接続し、ホース５ｋの内径を変えることにより薬液の滴下速度を調節する例、図１１のように、薬液タンク５内に循環水２ｉを通水する配管９が設けられている場合に、その配管９にエゼクター９ｃと自動開閉バルブ９ｄを設けることにより、自動開閉バルブ９ｄが開の状態でエゼクター９ｃを作動させて薬液を循環水２ｉ注入する例が挙げられる。自動開閉バルブ９ｄには電磁弁や電動弁等が用いられる。 In the present invention, as a method of adding a chemical solution to the circulating water from the cooling tower chemical solution adding unit, an opening/closing valve 5i is provided at the bottom of the chemical solution tank 5 as shown in FIG. An example of dripping into the water tank 2c, and further, as shown in FIG. 10, a hose 5k submerged in the chemical solution in the chemical solution tank 5 is connected to the opening/closing valve 5i, and the dropping rate of the chemical solution is adjusted by changing the inner diameter of the hose 5k. For example, as shown in FIG. 11, when a pipe 9 for circulating the circulating water 2i is provided in the chemical liquid tank 5, by providing an ejector 9c and an automatic opening/closing valve 9d in the pipe 9, the automatic opening/closing valve 9d There is an example in which the ejector 9c is actuated in a state where is open to inject the chemical liquid into the circulating water 2i. A solenoid valve, an electric valve, or the like is used as the automatic opening/closing valve 9d.
薬液タンク５の底部に設けられた開閉バルブ５ｉより薬液を下部水槽２ｃに滴下する場合、及び開閉バルブ５ｉに接続され、薬液内に沈められたホース５ｋにより薬液の滴下速度を調節する場合において、薬液タンク５の形状は、図２のように高さが低く縦横の幅を広くした扁平な形状にすることにより薬液使用に伴う液面高さの変動を少なく抑えることが可能となり、薬液の滴下速度の変動を小さくすることが可能となるので好ましい。 In the case of dropping the chemical liquid into the lower water tank 2c from the opening/closing valve 5i provided at the bottom of the chemical liquid tank 5 and in the case of adjusting the dropping speed of the chemical liquid by the hose 5k that is connected to the opening/closing valve 5i and is submerged in the chemical liquid, As shown in FIG. 2, the chemical liquid tank 5 has a flat shape with a low height and a wide vertical and horizontal width, so that it is possible to suppress the fluctuation of the liquid surface height due to the use of the chemical liquid. It is preferable because the fluctuation of the speed can be reduced.
薬液タンク５に設置する開閉バルブ５ｉに薬液タンク５側の薬液内に沈められたホース５ｋを接続する場合、ホース５ｋが液面近くに浮き上がって空気を吸い込むおそれがあり、ホース５ｋ自体を比重の大きい材料にするか、ホース５ｋ先端に重り５ｍを取り付けて薬液タンク５の底部近くにあるようにすることが望ましいが、薬液タンク５の底に溜まった薬液の不純物、各種ほこりやチリ等の沈殿物を吸い込まないようにホース５ｋ先端の吸い込み口と薬液タンク５の内側底面との間に隙間ができるようすることが好ましい。隙間を開ける方法としては、例えば図１０のように、１ｃｍ程度の隙間を設けたい場合には、厚さや直径が１ｃｍ程度の板状や線状で比重の大きい材料をホース５ｋ先端近傍に巻きつけてリング状とする方法が挙げられる。また、ホース５ｋを薬液内に沈めることにより、追加のポンプ設置を省くことが可能であり、ポンプ故障により薬液が添加されないという問題もなく、さらに、例えば後述の図１１等に比べてコストダウンに繋がるという利点もある。 When connecting the hose 5k submerged in the chemical liquid on the chemical liquid tank 5 side to the opening/closing valve 5i installed in the chemical liquid tank 5, the hose 5k may float near the liquid surface and suck in air, so that the hose 5k itself has a specific gravity. It is desirable to use a large material or to attach a weight 5m to the end of the hose 5k so that it is located near the bottom of the chemical solution tank 5, but impurities such as chemicals accumulated at the bottom of the chemical solution tank 5, precipitation of various dust and dust, etc. It is preferable to form a gap between the suction port at the tip of the hose 5k and the inner bottom surface of the chemical liquid tank 5 so as not to suck a substance. As a method of opening the gap, for example, as shown in FIG. 10, when it is desired to provide a gap of about 1 cm, a plate-like or linear material having a thickness or a diameter of about 1 cm and a large specific gravity is wound around the end of the hose 5k. There is a method of forming a ring shape. Further, by submerging the hose 5k in the chemical solution, it is possible to omit the installation of an additional pump, and there is no problem that the chemical solution is not added due to a pump failure. Further, for example, the cost can be reduced as compared with FIG. There is also the advantage of being connected.
図１１のように、薬液タンク５内に設置された循環水２ｉを通水する配管９にエゼクター９ｃを設け、エゼクター９ｃに配管９とは別に連設し、薬液タンク５内に位置して薬液を取り入れる取入管９ｅに自動開閉バルブ９ｄを設けて薬液を配管９内の循環水２ｉに注入する場合、エゼクター９ｃにより配管９内の循環水２ｉ中に薬液を噴射することで容易に薬液を循環水２ｉに添加、混合することが可能となる。 As shown in FIG. 11, an ejector 9c is provided in the pipe 9 for circulating the circulating water 2i installed in the chemical liquid tank 5, and the ejector 9c is continuously provided separately from the pipe 9 and is located in the chemical liquid tank 5. When a chemical solution is injected into the circulating water 2i in the pipe 9 by providing the intake pipe 9e with an automatic opening/closing valve 9d, the chemical liquid is easily circulated by ejecting the chemical solution into the circulating water 2i in the pipe 9 by the ejector 9c. It becomes possible to add and mix with water 2i.
冷却塔の下部水槽２ｃにヒータを設け、冷却塔の運転状況や季節により下部水槽２ｃ内の循環水温度を調節することが、冷却水の凍結防止や、本発明での冷却塔用薬液添加ユニットにおける薬液の凍結防止から好ましく、特に冷却水の凍結防止に必要な熱量に加えて薬液の凍結防止に必要な熱量を加味してヒータにより循環水２ｉを昇温することが好ましい。また、使用するヒータは水中で使用可能であれば特に限定されず、電気ヒータ等が使用される。 A heater is provided in the lower water tank 2c of the cooling tower, and the circulating water temperature in the lower water tank 2c can be adjusted according to the operating condition and season of the cooling tower to prevent the freezing of the cooling water and to add the cooling tower chemical liquid adding unit in the present invention. It is preferable to prevent the freezing of the chemical liquid in 1., and in particular, it is preferable to heat the circulating water 2i by a heater in consideration of the heat amount necessary to prevent the freezing of the chemical liquid in addition to the heat amount necessary to prevent the freezing of the cooling water. The heater used is not particularly limited as long as it can be used in water, and an electric heater or the like is used.
〈実施例１〉
請求項２の冷却塔の下部水槽の循環水をポンプにより薬液タンク内の配管に送水する手段による薬液の昇温例を記載する。下部水槽２ｃ内に凍結防止用のポンプ９ａを設置し、下部水槽２ｃの冷却水である循環水２ｉを薬液タンク５内の放熱用の配管９内に通水し、その熱により内部の薬液の凍結を防止する（図３）。
<Example 1>
An example of raising the temperature of the chemical liquid by means of pumping the circulating water in the lower water tank of the cooling tower of claim 2 to the pipe in the chemical liquid tank will be described. An antifreezing pump 9a is installed in the lower water tank 2c, and circulating water 2i, which is cooling water for the lower water tank 2c, is passed through the heat dissipation pipe 9 in the chemical liquid tank 5 to heat the internal chemical liquid. Prevent freezing (Figure 3).
〈実施例２〉
請求項３の冷却対象の負荷部から冷却塔に戻る循環水をポンプにより配管に送水する手段による薬液の昇温例を記載する。冷却水の循環水ライン２ｍに取り出し配管９ｂを設け、循環水ライン２ｍの冷却水を薬液タンク５内に設置された放熱用の配管９内に通水し、その熱により内部の薬液の凍結を防止する。この実施例では冷却塔１ｂ内部に設置された循環水ライン２ｍから取水するが、冷却塔１ｂの外部に設置された循環水ラインから取水することも可能である（図４）。
<Example 2>
An example of increasing the temperature of the chemical liquid by means of pumping the circulating water returning from the load part to be cooled to the cooling tower of claim 3 to the pipe will be described. The circulating water line 2m for cooling water is provided with a take-out pipe 9b, and the cooling water in the circulating water line 2m is passed through the heat-dissipating pipe 9 installed in the chemical liquid tank 5 to freeze the internal chemical liquid by the heat. To prevent. In this embodiment, water is taken from the circulating water line 2m installed inside the cooling tower 1b, but it is also possible to take water from the circulating water line installed outside the cooling tower 1b (FIG. 4).
〈実施例３〉
請求項４の冷却塔上部の散水部に溜まった循環水または散布時の散布水から取水する装置を用いて薬液タンク内に設置された配管に循環水を通水する手段による薬液の昇温例を図５に記載する（図５）。
<Example 3>
Noboru Yutakarei of the chemical by means of water flow circulating water in the installed piping in the chemical liquid tank by using the device for water intake from claim 4 of the cooling tower top of the nozzle unit to accumulated circulating water or spraying water during spraying Is described in FIG. 5 (FIG. 5).
〈実施例４〉
薬液タンクの少なくとも一部を下部水槽の循環水に浸す手段による薬液の昇温例を図６に記載する（図６）。
<Example 4>
An example of raising the temperature of the chemical liquid by means of immersing at least a part of the chemical liquid tank in the circulating water of the lower water tank is shown in FIG. 6 (FIG. 6).
〈実施例５〉
請求項１の薬液タンクに取り付けられた熱伝導性部材の少なくとも一部を下部水槽の循環水に浸す手段による薬液の昇温例を記載する。循環水２ｉの熱をアルミニウム等からなるフィン（熱伝導性部材５ｇ）で薬液タンク５へ導き、その熱により薬液タンク５の内部の薬液の凍結を防止する（図７）。
<Example 5>
An example of raising the temperature of the chemical liquid by means of immersing at least a part of the heat conductive member attached to the chemical liquid tank of claim 1 in the circulating water of the lower water tank will be described. The heat of the circulating water 2i is guided to the chemical liquid tank 5 by a fin (heat conductive member 5g) made of aluminum or the like, and the heat prevents the chemical liquid inside the chemical liquid tank 5 from freezing (FIG. 7).
〈実施例６〉
請求項５の熱伝導性部材が、薬液タンクと独立して前記冷却塔に一体化して取り付けられ、その少なくとも一部が下部水槽の循環水に浸漬されており、熱伝導性部材と薬液タンクとが取り付けと取り外しが容易な、着脱可能な構造有している例を図８に記載する（図８）。
<Example 6>
The heat conductive member according to claim 5 is integrally attached to the cooling tower independently of the chemical liquid tank, and at least a part of the heat conductive member is immersed in the circulating water in the lower water tank. FIG. 8 shows an example in which the device has a detachable structure that can be easily attached and detached (FIG. 8).
〈実施例７〉
請求項６の薬液タンクの底部近辺に薬液を排出する開閉バルブが設けられており、該開閉バルブを開にして薬液を下部水槽に滴下する例を記載する。薬液タンク５が下部水槽２ｃの上部にあることを生かし、ポンプを使用しないで開閉バルブ５ｉの開閉だけで薬液注入を行うことが可能である。薬液タンク５は従来の薬液タンクと比較して冷却塔１ｇの内部へ収納するために平らで奥行きの長い形状となっており、薬液の満杯時と空時での高低差が少なく、注入量にばらつきが出にくい（図９）。
<Example 7>
An open/close valve for discharging the chemical liquid is provided near the bottom of the chemical liquid tank of claim 6 , and an example will be described in which the open/close valve is opened to drop the chemical liquid into the lower water tank. Taking advantage of the fact that the chemical solution tank 5 is located above the lower water tank 2c, it is possible to inject the chemical solution only by opening and closing the open/close valve 5i without using a pump. The chemical solution tank 5 has a flat and long shape to store it inside the cooling tower 1g as compared with the conventional chemical solution tank, and there is little difference in height between the time when the chemical solution is full and the time when the chemical solution is empty, and the injection amount is small. Variation is unlikely (Fig. 9).
〈実施例８〉
請求項７の薬液タンク下部近辺に薬液供給用の開閉バルブが設けられており、この開閉バルブには薬液タンク内の薬液に沈められた流量調整用のホースが取り付けられており、ホースの先端にはリング状の銅製重りが設けられ、バルブを開にして薬液を下部水槽に滴下する例を記載する。流量調整用のホース５ｋはその口径により薬液の流量を調整する作用の他、ホース５ｋの内面、外面が常に薬液と接触しているために空気との接触や乾燥などによる薬剤の析出が起きない。ホース５ｋの先端近辺の重り５ｍによりホース５ｋの浮き上がりを防止し、空気の吸い込みを防止する。更に、ホース５ｋ先端が薬液タンク５底から少なくとも１ｃｍ程度浮くように重り５ｍの厚さを調節することにより、薬液タンク５底部に沈殿したゴミや析出物を吸い込むことがなくなった（図１０）。
<Example 8>
An open/close valve for supplying a chemical liquid is provided near the lower portion of the chemical liquid tank of claim 7 , and a hose for adjusting a flow rate submerged in the chemical liquid in the chemical liquid tank is attached to the open/close valve, and the end of the hose is attached. Describes an example in which a ring-shaped copper weight is provided, the valve is opened, and the chemical solution is dropped into the lower water tank. The hose 5k for adjusting the flow rate has the function of adjusting the flow rate of the chemical solution by its diameter, and since the inner surface and the outer surface of the hose 5k are always in contact with the chemical solution, the deposition of the chemical agent due to contact with air or drying does not occur. .. The weight 5m near the tip of the hose 5k prevents the hose 5k from rising and prevents inhalation of air. Furthermore, by adjusting the thickness of the weight 5m so that the tip of the hose 5k floats from the bottom of the chemical liquid tank 5 by at least about 1 cm, it is possible to prevent the dust and precipitates settling at the bottom of the chemical liquid tank 5 from being sucked in (FIG. 10).
〈実施例９〉
請求項８の薬液タンク内に設置された循環水を通水する配管にエゼクターと開閉バルブが設けられ、バルブが開の状態でエゼクターを作動させて薬液を循環水に注入する例を記載する。この実施例では、冷却塔１ｈの下部水槽２ｃの冷却水である循環水２ｉをポンプ９ａにより薬液タンク５内の配管９に送水する手段を有し、循環水ライン２ｐは冷却塔１ｈ外部に設置されているが、循環水ラインの一部が冷却塔内部に設置することも可能である（図１１）。
<Example 9>
An example will be described in which an ejector and an opening/closing valve are provided in a pipe for circulating water, which is installed in the chemical liquid tank of claim 8 , and the ejector is operated with the valve open to inject the chemical liquid into the circulating water. In this embodiment, the circulating water 2i which is the cooling water for the lower water tank 2c of the cooling tower 1h is provided with a pump 9a for supplying water to the pipe 9 in the chemical liquid tank 5, and the circulating water line 2p is installed outside the cooling tower 1h. However, a part of the circulating water line can be installed inside the cooling tower (FIG. 11).
本発明の冷却塔用薬液添加ユニット、冷却塔、及び冷却塔用薬液の凍結防止方法によれば、冬場であっても薬液凍結や薬剤析出の心配がなく、簡便な方法で容易に薬液制御が可能であり、循環水系に薬液注入を行う冷却塔を使用する産業の広い分野に応用できる。 According to the cooling tower chemical liquid addition unit, the cooling tower, and the cooling tower chemical freezing prevention method of the present invention, there is no fear of chemical liquid freezing or chemical precipitation even in winter, and the chemical liquid can be easily controlled by a simple method. It is possible and applicable to a wide range of industries using a cooling tower for injecting chemicals into a circulating water system.
１〜１ｈ 冷却塔
２ｂ ファン
２ｃ 下部水槽
２ｄ 水冷却部
２ｆ 散水部
２ｇ 通風空間
２ｈ 通気部
２ｉ 循環水
２ｋ 負荷部
２ｍ 循環水ライン
２ｎ 取水する装置
２ｐ 循環水ライン
３ 外壁
５ 薬液タンク
５ａ 液面計
５ｂ 液抜き口
５ｅ 注入口
５ｆ 薬液タンクの一部
５ｇ 熱伝導性部材
５ｈ 熱伝導性部材
５ｉ 開閉バルブ
５ｋ ホース
５ｍ 重り
６ 薬液注入機器（薬液ポンプ）
６ａ 吸込管
７ コントロール部
９ 配管
９ａ ポンプ
９ｂ 取り出し配管
９ｃ エゼクター
９ｄ 自動開閉バルブ
９ｅ 取入管
１０ 薬液
１１〜１１ｈ 冷却塔用薬液添加ユニット
1-1h Cooling tower 2b Fan 2c Lower water tank 2d Water cooling part 2f Sprinkling part 2g Ventilation space 2h Ventilation part 2i Circulating water 2k Loading part 2m Circulating water line 2n Water intake device 2p Circulating water line 3 Outer wall 5 Chemical liquid tank 5a Liquid level gauge 5b Drain port
5e Injection port 5f Part of chemical liquid tank 5g Thermal conductive member 5h Thermal conductive member 5i Open/close valve 5k Hose 5m Weight 6 Chemical liquid injection device (chemical liquid pump)
6a Suction pipe 7 Control part 9 Piping 9a Pump 9b Ejection pipe 9c Ejector 9d Automatic opening/closing valve 9e Intake pipe 10 Chemical solution 11-11h Chemical solution addition unit for cooling tower
Claims (11)
該冷却塔用薬液添加ユニットが、冷却塔の外壁の外部に位置するコントロール部、該通風空間に位置する薬液タンク、及び該薬液タンク内の薬液を昇温する手段を有しており、
当該薬液タンク内の薬液を昇温する手段が、前記薬液タンク内に設置された配管に前記循環水を通水する手段、または、前記薬液タンクに取り付けられた熱伝導性部材の少なくとも一部を下部水槽の循環水に浸す手段であることを特徴とする冷却塔用薬液添加ユニット。 A fan on the upper part, and a sprinkler part for collecting circulating water for spraying, a lower water tank for collecting circulating water on the lower part, a ventilation part for introducing air from the outside to the side surface, circulating water sprayed from the sprinkling part and the inside from the ventilation part A cooling tower having a water cooling part for contacting the air introduced into the fan, and a ventilation space for guiding the air from the water cooling part to the fan below the fan and above the lower water tank. A cooling liquid chemical addition unit,
The cooling tower chemical solution adding unit has a control unit located outside the outer wall of the cooling tower, a chemical solution tank located in the ventilation space, and means for raising the temperature of the chemical solution in the chemical solution tank ,
Means for raising the temperature of the chemical solution in the chemical solution tank, means for passing the circulating water through the pipe installed in the chemical solution tank, or at least a part of the heat conductive member attached to the chemical solution tank A chemical addition unit for a cooling tower, which is a means for immersing in the circulating water of a lower water tank .
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