JP3690650B2 - Open circulation cooling water system cooling tower - Google Patents

Open circulation cooling water system cooling tower Download PDF

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Publication number
JP3690650B2
JP3690650B2 JP2000074247A JP2000074247A JP3690650B2 JP 3690650 B2 JP3690650 B2 JP 3690650B2 JP 2000074247 A JP2000074247 A JP 2000074247A JP 2000074247 A JP2000074247 A JP 2000074247A JP 3690650 B2 JP3690650 B2 JP 3690650B2
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Prior art keywords
cooling water
cooling
sludge
cooling tower
wall
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JP2001263990A (en
Inventor
晶 飯村
賢二 木幡
祐介 牛島
哲朗 酒村
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Kurita Water Industries Ltd
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Kurita Water Industries Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、開放循環式冷却水系冷却塔に関する。さらに詳しくは、本発明は、開放循環式冷却水系において、冷却水中に生成したスラッジを効果的に捕捉してスラッジによる循環ラインの閉塞を防止し、冷却水系の安定運転を可能にする開放循環式冷却水系冷却塔に関する。
【０００２】
【従来の技術】
開放循環式冷却水系では、水の循環利用に伴い、循環水中の塩類濃度が増加し、炭酸カルシウム、シリカなどのスケールやスラッジ（壁面に付着したスケールや生物フロックなどが脱離したもの、スケール成分が析出して水中に浮遊又は堆積したものの総称。以下、これらを単に「スラッジ」という。）が発生する。熱交換器へのスケールの付着を防止するために、永久磁石、ソレノイドコイル型磁石などの磁気装置、異種金属電極などの金属イオン溶出装置、セラミックボールなどのセラミック部材などを用いて、スケール成分を積極的に析出させた場合には、特に顕著にスラッジが発生する。循環水中で発生するスラッジは、水系内に流入する固形物とともに、水系内に堆積し、配管を閉塞させたり、ポンプを詰まらせたり、散水板を詰まらせたりするトラブルを発生させる。このために、発生したスラッジや流入した固形物は、回収して水系外に排出する必要がある。
従来より、循環ラインの閉塞を防ぐために、循環ポンプにストレーナを設置してスラッジを捕捉している。しかし、ストレーナを月１回程度清掃する必要があり、手間がかかる上に、ストレーナの清掃には冷却水系の運転を停止しなければならないので、操業に支障をきたす場合が多い。また、スケールが析出しやすい環境においては、清掃頻度はさらに多くなる。
冷却水系のスラッジなどを分離、回収する方法として、下部水槽内に板状の堰などを設けて低流速部を形成し、低流速部にスラッジを沈降、堆積させる方法も採られている。しかし、板状の堰を設置する方法では、堰を下部水槽の水位以上にすることができないために、堰を越えて流出したスラッジにより、循環ラインの閉塞が生ずる場合がある。
このために、冷却水中のスラッジに起因する循環ラインの閉塞による循環水量の低下を防止することができ、特にスケール成分の析出する環境で使用して有効な開放循環式冷却水系冷却塔が求められていた。
【０００３】
【発明が解決しようとする課題】
本発明は、開放循環式冷却水系において、冷却水中に生成したスラッジを効果的に捕捉してスラッジによる循環ラインの閉塞を防止し、冷却水系の安定運転を可能にする開放循環式冷却水系冷却塔を提供することを目的としてなされたものである。
【０００４】
本発明者らは、上記の課題を解決すべく鋭意研究を重ねた結果、冷却塔の下部水槽内に、冷却水出口を隔離する網目状の壁を設けることにより、スラッジを効果的に捕捉して循環ラインへの流出を防止し、循環ラインの閉塞を防ぎ得ることを見いだし、この知見に基づいて本発明を完成するに至った。
すなわち、本発明は、
（１）開放循環式冷却水系に設けられた冷却塔において、冷却塔の下部水槽内に、冷却水出口を隔離する目開き１０〜１ , ０００μｍの網目状の壁を有し、該網目状の壁の下縁が下部水槽の底部に接し、壁の高さが下部水槽内の水位より高く形成されるとともに、前記網目状の壁により隔てられた冷却水出口側の下部水槽から冷却水を取り出して処理して下部水槽のスラッジ堆積側に戻す経路を設け、該経路に永久磁石と異種金属電極を組み合わせたスケール析出装置が設けられていることを特徴とする開放循環式冷却水系冷却塔、
を提供するものである。
【０００５】
【発明の実施の形態】
本発明の開放循環式冷却水系冷却塔は、開放循環式冷却水系に設けられた冷却塔において、冷却塔の下部水槽内に、冷却水出口を隔離する網目状の壁を有する冷却塔である。
本発明の冷却塔は、シリカが過飽和となっている冷却水系、例えば、pH７〜９、水温１０℃でのシリカ濃度が１００mgSiO2／Ｌ以上で分散剤を添加していない冷却水系、ランジュリア指数が正であって、分散剤を添加しておらず、炭酸カルシウムが過飽和となっている冷却水系といったスラッジの発生量の多い開放循環式冷却水系に特に好適に適用することができる。特に、スケール成分を析出させている開放循環式冷却水系、例えば、スケール付着防止を目的として、炭酸カルシウム粉末、ケイ酸マグネシウム粉末などのスケール物質の種晶となる物質を添加し、スケール物質の析出を促進している冷却水系、永久磁石、ソレノイドコイル型磁石などの磁気装置、異種金属電極などを用いた金属イオン溶出装置、セラミックボールなどのセラミック部材などを、単独で又は組み合わせて使用した析出型スケール防止技術を適用している冷却水系などでは、シリカ濃度が１００mgSiO2／Ｌ以上又は／及びランジュリア指数が正となり、分散剤を添加しない場合は、シリカや炭酸カルシウムが過飽和となってスラッジが多く発生する。
本発明の冷却塔の方式に特に制限はなく、例えば、噴霧塔式又は充填塔式、押込式若しくは誘引式の強制通風塔又は自然通風塔、向流式又は直交流式などのいずれの方式とすることもできる。
【０００６】
図１(ａ)は、本発明の参考例の冷却塔の一態様の模式的側面図であり、図１(ｂ)は、その模式的平面図である。本態様の冷却塔は、誘引通風直交流式角形冷却塔であって、下部水槽１内に、冷却水出口２を隔離する網目状の壁３が設けられ、下部水槽が冷却水出口側とスラッジ堆積側４に隔てられている。冷却水は、冷却水出口より取り出され、循環ポンプ５により熱交換器６に送られ、温水となって冷却塔へ返送され、冷却塔上部より充填材７に散水される。温水は、ファン８によりルーバー９から吸い込まれた空気と接触し、一部が蒸発して蒸発潜熱を放出することにより冷水となって、下部水槽に落下する。図１に示される冷却水系には、循環ラインに永久磁石と異種金属電極を組み合わせたスケール析出装置１１が設けられている。本発明の参考例の冷却塔は、図１に示すように、充填材から落下する冷水が下部水槽のスラッジ堆積側に落下する構造であることが好ましい。冷水中に存在するスラッジは、網目状の壁を通過しないので、冷却水出口から取り出される冷却水はスラッジを含まず、このために、循環ラインにおいて、スラッジによる障害が発生するおそれがない。
本発明の冷却塔は、図１に示すように、網目状の壁の下縁を下部水槽の底部に接し、壁の高さを下部水槽の水位１０より高くすることが好ましい。下部水槽に板状の壁を設ける場合は、壁の高さは下部水槽の水位より低い必要があり、そのために、スラッジの一部が壁を越えて冷却水出口側に流れ出すことは避けられなかった。本発明の冷却塔は、下部水槽の水位より高い網目状の壁を設けることにより、壁を越えて冷却水出口側に流れる冷却水はなく、冷却水はすべて網目を通過するので、スラッジが網目により捕捉、除去された冷却水を冷却水出口より取り出すことができる。
本発明の冷却塔に用いる網目状の壁の材質に特に制限はなく、例えば、ステンレス鋼、リン青銅、銅−亜鉛合金、各種のプラスチックなどを挙げることができる。網目状の壁の網目の形状に特に制限はなく、例えば、平織、綾織などの織物、円孔、角孔などの孔をあけた平板などを挙げることができる。網目状の壁の目開きは、１０〜２,０００μｍであることが好ましく、１００〜１,０００μｍであることがより好ましい。目開きが１０μｍ未満であると、網目状の壁における圧力損失が大きく、冷却水の通過に障害を生ずるおそれがある。目開きが２,０００μｍを超えると、スラッジの一部が通り抜けて冷却水出口側に洩れ出すおそれがある。
【０００７】
図２(ａ)は、本発明の冷却塔の他の態様の模式的側面図であり、図２(ｂ)は、その模式的平面図である。本態様の冷却塔は、誘引通風向流式丸形冷却塔であって、下部水槽１内に、冷却水出口２を隔離する網目状の壁３が設けられ、下部水槽が冷却水出口側とスラッジ堆積側４に隔てられている。本態様の冷却塔には、網目状の壁３により隔てられた冷却水出口側の下部水槽１から冷却水を取り出して処理して、下部水槽１のスラッジ堆積側４に戻すために、永久磁石と異種金属電極を組み合わせたスケール析出装置１１が設けられている。冷却水は、冷却水出口より取り出され、循環ポンプ５により熱交換器６に送られ、温水となって冷却塔へ返送され、冷却塔上部より充填材７に散水される。温水は、ファン８によりルーバー９から吸い込まれた空気と接触し、一部が蒸発して蒸発潜熱を放出することにより冷水となって、下部水槽に落下する。本態様の冷却塔は、充填材から落下する冷水が、下部水槽の中央のスラッジ堆積側に落下する。冷水中に存在するスラッジは、網目状の壁を通過しないので、冷却水出口から取り出される冷却水はスラッジを含まず、このために、循環ラインにおいて、スラッジによる障害が発生するおそれがない。
図３(ａ)は、本発明の冷却塔の他の態様の模式的側面図であり、図３(ｂ)は、その模式的平面図である。本態様の冷却塔は、押込通風式丸形冷却塔であって、下部水槽１内に、冷却水出口２を隔離する網目状の壁３が設けられ、下部水槽が冷却水出口側とスラッジ堆積側４に隔てられている。冷却水は、冷却水出口より取り出され、循環ポンプ５により熱交換器６に送られ、温水となって冷却塔へ返送され、冷却塔上部より充填材７に散水される。温水は、ファン８により押し込まれた空気と接触し、一部が蒸発して蒸発潜熱を放出することにより冷水となって、下部水槽に落下する。本態様の冷却塔は、充填材から落下する冷水が、下部水槽の中央のスラッジ堆積側に落下する。冷水中に存在するスラッジは、網目状の壁を通過しないので、冷却水出口から取り出される冷却水はスラッジを含まず、このために、循環ラインにおいて、スラッジによる障害が発生するおそれがない。
本発明の開放循環式冷却水系冷却塔によれば、用水にスラッジ成分が含まれていても、循環ラインの閉塞を有効に防止して、冷却水系を安定して運転することができる。本発明の冷却塔は、スラッジ堆積側の水槽底部面積を大きくとることができるので、循環ポンプに設置したストレーナと異なり、堆積したスラッジを除去する頻度は年１回程度で十分である。したがって、冷却水系の定期修理の際にスラッジを除去することができ、スラッジ除去のために冷却水系を停止する必要がない。
【０００８】
【発明の効果】
本発明の開放循環式冷却水系冷却塔は、下部水槽に網目状の壁を有するので、用水中にスラッジ成分が含まれていても、網目状の壁で捕捉され、スラッジによる循環ラインの閉塞は起こらず、冷却水系の安定運転が可能になる。本発明の冷却塔は、スケール成分の析出環境で運転しても、上記の効果を発揮するので有効である。
【図面の簡単な説明】
【図１】 図１は、本発明の参考例の冷却塔の一態様の模式的側面図及び模式的平面図である。
【図２】 図２は、本発明の冷却塔の一態様の模式的側面図及び模式的平面図である。
【図３】 図３は、本発明の冷却塔の他の態様の模式的側面図及び模式的平面図である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an open circulation type cooling water system cooling tower. More specifically, the present invention relates to an open circulation type cooling water system that effectively captures sludge generated in the cooling water and prevents the clogging of the circulation line by the sludge and enables stable operation of the cooling water system. The present invention relates to a cooling water system cooling tower.
[0002]
[Prior art]
In an open circulation cooling water system, the concentration of salts in the circulating water increases with the circulation of water, and scales and sludges such as calcium carbonate and silica (those with scales and biological flocs attached to the wall are removed, scale components) Is a general term for the substance that has been deposited and suspended or deposited in water, hereinafter referred to simply as "sludge"). In order to prevent the scale from adhering to the heat exchanger, use a magnetic device such as a permanent magnet or a solenoid coil magnet, a metal ion elution device such as a dissimilar metal electrode, or a ceramic member such as a ceramic ball. When positively precipitated, sludge is particularly noticeably generated. The sludge generated in the circulating water accumulates in the water system together with the solid matter flowing into the water system, and causes troubles such as blocking the piping, clogging the pump, and clogging the water spray plate. For this reason, the generated sludge and the inflowing solid matter must be collected and discharged out of the water system.
Conventionally, in order to prevent clogging of the circulation line, a strainer is installed in the circulation pump to capture sludge. However, it is necessary to clean the strainer about once a month, which is troublesome, and since the operation of the cooling water system must be stopped for cleaning the strainer, the operation is often hindered. In an environment where scale is likely to precipitate, the frequency of cleaning is further increased.
As a method for separating and recovering cooling water sludge and the like, a method in which a plate-like weir or the like is provided in the lower water tank to form a low flow velocity portion, and sludge is settled and deposited in the low flow velocity portion. However, in the method of installing a plate-like weir, since the weir cannot be made higher than the water level of the lower water tank, the sludge that flows out over the weir may cause the circulation line to be blocked.
For this reason, it is possible to prevent a decrease in the amount of circulating water due to clogging of the circulation line caused by sludge in the cooling water, and there is a need for an open circulation cooling water system cooling tower that is effective especially in an environment where scale components are deposited. It was.
[0003]
[Problems to be solved by the invention]
The present invention provides an open circulation type cooling water system cooling tower that effectively captures sludge generated in the cooling water in an open circulation type cooling water system, prevents clogging of the circulation line by the sludge, and enables stable operation of the cooling water system. It was made for the purpose of providing.
[0004]
As a result of intensive studies to solve the above-mentioned problems, the present inventors effectively capture sludge by providing a mesh-like wall that isolates the cooling water outlet in the lower tank of the cooling tower. Thus, it has been found that the outflow to the circulation line can be prevented and the blockage of the circulation line can be prevented, and the present invention has been completed based on this finding.
That is, the present invention
(1) In a cooling tower provided in an open circulation type cooling water system, the lower water tank of the cooling tower has a mesh-like wall having an opening of 10 to 1,000 μm for isolating the cooling water outlet , The lower edge of the wall is in contact with the bottom of the lower tank, the height of the wall is formed higher than the water level in the lower tank, and the cooling water is taken out from the lower tank on the cooling water outlet side separated by the mesh-like wall An open circulation type cooling water system cooling tower, characterized in that a path for returning to the sludge accumulation side of the lower water tank is provided, and a scale deposition device combining a permanent magnet and a dissimilar metal electrode is provided in the path,
Is to provide.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The open circulation type cooling water system cooling tower of the present invention is a cooling tower provided in the open circulation type cooling water system, having a mesh-like wall that isolates the cooling water outlet in the lower water tank of the cooling tower.
The cooling tower of the present invention is a cooling water system in which silica is supersaturated, for example, a cooling water system having a silica concentration of 100 mg SiO 2 / L or higher at a pH of 7 to 9 and a water temperature of 10 ° C., and having no added dispersant. Is positive, is not added with a dispersant, and can be particularly suitably applied to an open circulation type cooling water system with a large amount of sludge generation such as a cooling water system in which calcium carbonate is supersaturated. In particular, an open-circulation cooling water system in which scale components are precipitated, for example, for the purpose of preventing scale adhesion, a substance that becomes a seed crystal of scale substances such as calcium carbonate powder and magnesium silicate powder is added to precipitate scale substances. Precipitation type that uses cooling water systems, permanent magnets, solenoid coil magnets, etc., metal ion elution devices using dissimilar metal electrodes, ceramic members such as ceramic balls, etc. alone or in combination In a cooling water system or the like to which scale prevention technology is applied, the silica concentration is 100 mg SiO 2 / L or more or / and the Languria index is positive, and when no dispersant is added, silica and calcium carbonate become supersaturated and sludge is generated. Many occur.
There is no particular limitation on the method of the cooling tower of the present invention, for example, any method such as a spray tower type or packed tower type, a forced ventilation tower or a forced ventilation tower or a natural ventilation tower, a countercurrent type or a cross flow type You can also
[0006]
FIG. 1 (a) is a schematic side view of an embodiment of a cooling tower of a reference example of the present invention, and FIG. 1 (b) is a schematic plan view thereof. The cooling tower of this aspect is an induced draft cross-flow type square cooling tower, in which a mesh-like wall 3 for isolating the cooling water outlet 2 is provided in the lower water tank 1, and the lower water tank is connected to the cooling water outlet side and sludge. Separated on the deposition side 4. The cooling water is taken out from the cooling water outlet, is sent to the heat exchanger 6 by the circulation pump 5, is returned to the cooling tower as hot water, and is sprinkled into the filler 7 from the upper part of the cooling tower. The hot water comes into contact with the air sucked from the louver 9 by the fan 8, and a part of it evaporates to release latent heat of evaporation, thereby becoming cold water and falling into the lower water tank. The cooling water system shown in FIG. 1 is provided with a scale deposition device 11 in which a permanent magnet and a dissimilar metal electrode are combined in a circulation line. As shown in FIG. 1, the cooling tower of the reference example of the present invention preferably has a structure in which cold water falling from the filler falls to the sludge accumulation side of the lower water tank. Since the sludge existing in the cold water does not pass through the mesh-like wall, the cooling water taken out from the cooling water outlet does not include the sludge, and therefore there is no possibility that the sludge will be damaged in the circulation line.
In the cooling tower of the present invention, as shown in FIG. 1, it is preferable that the lower edge of the mesh wall is in contact with the bottom of the lower tank, and the height of the wall is higher than the water level 10 of the lower tank. When a plate-like wall is provided in the lower tank, the height of the wall needs to be lower than the water level of the lower tank. Therefore, it is inevitable that a part of the sludge flows over the wall to the cooling water outlet side. It was. In the cooling tower of the present invention, by providing a mesh-like wall higher than the water level of the lower tank, there is no cooling water flowing over the wall to the cooling water outlet side, and all the cooling water passes through the mesh, so that sludge is meshed. The cooling water captured and removed by the above can be taken out from the cooling water outlet.
There is no restriction | limiting in particular in the material of the mesh-shaped wall used for the cooling tower of this invention, For example, stainless steel, phosphor bronze, copper-zinc alloy, various plastics etc. can be mentioned. The shape of the mesh of the mesh-like wall is not particularly limited, and examples thereof include woven fabrics such as plain weave and twill weave, flat plates having holes such as circular holes and square holes. The mesh wall opening is preferably 10 to 2,000 μm, more preferably 100 to 1,000 μm. When the mesh opening is less than 10 μm, the pressure loss in the mesh-like wall is large, and there is a possibility that the passage of the cooling water may be obstructed. If the mesh size exceeds 2,000 μm, part of the sludge may pass through and leak out to the cooling water outlet side.
[0007]
FIG. 2 (a) is a schematic side view of another embodiment of the cooling tower of the present invention, and FIG. 2 (b) is a schematic plan view thereof. The cooling tower of this embodiment is an induced draft counterflow type round cooling tower, and a mesh-like wall 3 for isolating the cooling water outlet 2 is provided in the lower water tank 1, and the lower water tank is connected to the cooling water outlet side. It is separated by the sludge accumulation side 4. In the cooling tower of this embodiment, a permanent magnet is used to take out the cooling water from the lower water tank 1 on the cooling water outlet side separated by the mesh-like wall 3, process it, and return it to the sludge accumulation side 4 of the lower water tank 1. And a scale depositing device 11 in which different metal electrodes are combined. The cooling water is taken out from the cooling water outlet, is sent to the heat exchanger 6 by the circulation pump 5, is returned to the cooling tower as hot water, and is sprinkled into the filler 7 from the upper part of the cooling tower. The hot water comes into contact with the air sucked from the louver 9 by the fan 8, and a part of it evaporates to release latent heat of evaporation, thereby becoming cold water and falling into the lower water tank. In the cooling tower of this aspect, the cold water falling from the filler falls to the sludge accumulation side in the center of the lower water tank. Since the sludge existing in the cold water does not pass through the mesh-like wall, the cooling water taken out from the cooling water outlet does not include the sludge, and therefore there is no possibility that the sludge will be damaged in the circulation line.
FIG. 3 (a) is a schematic side view of another embodiment of the cooling tower of the present invention, and FIG. 3 (b) is a schematic plan view thereof. The cooling tower of this embodiment is a forced draft type round cooling tower, in which a mesh-like wall 3 for isolating the cooling water outlet 2 is provided in the lower water tank 1, and the lower water tank is connected to the cooling water outlet side and sludge accumulation. Separated on the side 4. The cooling water is taken out from the cooling water outlet, is sent to the heat exchanger 6 by the circulation pump 5, is returned to the cooling tower as hot water, and is sprinkled into the filler 7 from the upper part of the cooling tower. The hot water comes into contact with the air pushed in by the fan 8, partly evaporates and releases latent heat of evaporation to become cold water and falls into the lower water tank. In the cooling tower of this aspect, the cold water falling from the filler falls to the sludge accumulation side in the center of the lower water tank. Since the sludge existing in the cold water does not pass through the mesh-like wall, the cooling water taken out from the cooling water outlet does not include the sludge, and therefore there is no possibility that the sludge will be damaged in the circulation line.
According to the open circulation type cooling water system cooling tower of the present invention, even if a sludge component is contained in the water, the clogging of the circulation line can be effectively prevented and the cooling water system can be operated stably. Since the cooling tower of the present invention can increase the bottom area of the water tank on the sludge accumulation side, it is sufficient to remove the accumulated sludge once a year unlike the strainer installed in the circulation pump. Therefore, sludge can be removed during the periodic repair of the cooling water system, and it is not necessary to stop the cooling water system for sludge removal.
[0008]
【The invention's effect】
Since the open circulation type cooling water system cooling tower of the present invention has a mesh-like wall in the lower tank, even if sludge components are contained in the water, it is captured by the mesh-like wall, and the clogging of the circulation line by the sludge is prevented. It does not occur and stable operation of the cooling water system becomes possible. The cooling tower of the present invention is effective because it exhibits the above effects even when operated in an environment where scale components are deposited.
[Brief description of the drawings]
FIG. 1 is a schematic side view and a schematic plan view of an embodiment of a cooling tower according to a reference example of the present invention.
Figure 2 is a schematic side view and a schematic plan view of one embodiment of a cooling tower of the present invention.
FIG. 3 is a schematic side view and a schematic plan view of another embodiment of the cooling tower of the present invention.

Claims (1)

開放循環式冷却水系に設けられた冷却塔において、冷却塔の下部水槽内に、冷却水出口を隔離する目開き１０〜１In the cooling tower provided in the open circulation type cooling water system, the openings 10 to 1 for isolating the cooling water outlet in the lower water tank of the cooling tower ,, ０００μｍの網目状の壁を有し、該網目状の壁の下縁が下部水槽の底部に接し、壁の高さが下部水槽内の水位より高く形成されるとともに、前記網目状の壁により隔てられた冷却水出口側の下部水槽から冷却水を取り出して処理して下部水槽のスラッジ堆積側に戻す経路を設け、該経路に永久磁石と異種金属電極を組み合わせたスケール析出装置が設けられていることを特徴とする開放循環式冷却水系冷却塔。Having a mesh wall of 000 μm, the lower edge of the mesh wall is in contact with the bottom of the lower water tank, and the height of the wall is higher than the water level in the lower water tank, and is separated by the mesh wall A path for removing the cooling water from the lower water tank on the cooling water outlet side, processing it and returning it to the sludge accumulation side of the lower water tank is provided, and a scale deposition device combining a permanent magnet and a dissimilar metal electrode is provided in the path. An open circulation type cooling water system cooling tower characterized by the above.
JP2000074247A 2000-03-16 2000-03-16 Open circulation cooling water system cooling tower Expired - Fee Related JP3690650B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007192445A (en) * 2006-01-18 2007-08-02 Toyota Motor Corp Rubbish collecting device for cooling tower

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009275977A (en) * 2008-05-14 2009-11-26 Nippon Jisui Kk Cooling tower system
JP2012002405A (en) * 2010-06-15 2012-01-05 Tlv Co Ltd Decompressed steam heating device
CN108680044A (en) * 2018-06-08 2018-10-19 南京师范大学 A kind of water-saving cooling tower systems of original position self-cleaning

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007192445A (en) * 2006-01-18 2007-08-02 Toyota Motor Corp Rubbish collecting device for cooling tower
JP4529914B2 (en) * 2006-01-18 2010-08-25 トヨタ自動車株式会社 Waste collection device for cooling tower

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