JP2021092346A - Method for suppressing scale generated from cooling water of cooling tower - Google Patents

Method for suppressing scale generated from cooling water of cooling tower Download PDF

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JP2021092346A
JP2021092346A JP2019222953A JP2019222953A JP2021092346A JP 2021092346 A JP2021092346 A JP 2021092346A JP 2019222953 A JP2019222953 A JP 2019222953A JP 2019222953 A JP2019222953 A JP 2019222953A JP 2021092346 A JP2021092346 A JP 2021092346A
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cooling water
cooling
cooling tower
tower
purifying
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JP6736750B1 (en
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高康 武藤
Takayasu Muto
高康 武藤
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SHINKEN KK
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Abstract

To suppress a foreign matter, such as scale, generated in cooling water with a simple configuration.SOLUTION: A method for cleaning cooling water for a cooling tower 1 includes a step of installing a cleaning body 12, in which a cleaning agent made of a metallic material containing magnesium is filled in a bag, in a position through which cooling water passes in the cooling tower 1, thereby modifying the cooling water passing through the cleaning body 12.SELECTED DRAWING: Figure 1

Description

本開示は、クーリングタワーの冷却水浄化方法、クーリングタワー、及び、クーリングタワー用浄化体に関する。 The present disclosure relates to a cooling water purification method for a cooling tower, a cooling tower, and a purifying body for a cooling tower.

クーリングタワー（冷却塔）は、ビル空調や地域冷暖房設備である冷凍機の冷却水を冷却するために用いられる装置であり、例えば建物の屋上等に設置される（例えば特許文献１）。 A cooling tower (cooling tower) is a device used for cooling cooling water of a refrigerator, which is a building air conditioner or a district heating / cooling facility, and is installed on, for example, the rooftop of a building (for example, Patent Document 1).

特開２０１３−１３９９５３号公報Japanese Unexamined Patent Publication No. 2013-139953

クーリングタワーを循環する冷却水は、主に水道水が用いられる。このため、クーリングタワーを長期間使用していると、水道水に含まれる炭酸カルシウム等が結晶化してスケール（カルキ、水垢）が発生して、配管内のフィルタの目詰まりを生じる場合がある。スケールによってフィルタの目詰まりが起きると、冷却水の流量が少なくなって冷却性能が低下したり、ポンプへの負荷が大きくなりポンプ故障の可能性が高くなる。このため従来より例えば冷却水への薬剤投入などのスケール低減の対策が取られているが、高コストの問題がある。 Tap water is mainly used as the cooling water that circulates in the cooling tower. Therefore, when the cooling tower is used for a long period of time, calcium carbonate or the like contained in tap water may crystallize to generate scale (scaly, scale), which may cause clogging of the filter in the pipe. When the filter is clogged by the scale, the flow rate of the cooling water is reduced, the cooling performance is lowered, and the load on the pump is increased, increasing the possibility of pump failure. For this reason, measures for scale reduction such as injection of chemicals into cooling water have been taken conventionally, but there is a problem of high cost.

本開示は、簡易な構成で冷却水中のスケールの発生を抑制できるクーリングタワーの冷却水浄化方法、クーリングタワー、及び、クーリングタワー用浄化体を提供することを目的とする。 An object of the present disclosure is to provide a cooling water purification method for a cooling tower, a cooling tower, and a purification body for a cooling tower, which can suppress the generation of scale in cooling water with a simple configuration.

本発明の実施形態の一観点に係るクーリングタワーの冷却水浄化方法は、マグネシウムを含む金属材料から成る浄化剤が袋に詰められた浄化体を前記クーリングタワー内の冷却水が通過する位置に設置する。 In the cooling water purification method for a cooling tower according to one aspect of the embodiment of the present invention, a purifying body in which a purifying agent made of a metal material containing magnesium is packed in a bag is installed at a position in the cooling tower through which the cooling water passes.

同様に、実施形態の一観点に係るクーリングタワーは、冷却水が通過する位置に設置され、マグネシウムを含む金属材料から成る浄化剤が袋に詰められた浄化体を備える。 Similarly, the cooling tower according to one aspect of the embodiment is installed at a position through which cooling water passes, and includes a purifying body in which a purifying agent made of a metal material containing magnesium is packed in a bag.

同様に、実施形態の一観点に係るクーリングタワー用浄化体は、マグネシウムを含む金属材料から成る浄化剤が袋に詰められて形成され、クーリングタワー内の冷却水が通過する位置に設置される。 Similarly, the purifying body for a cooling tower according to one aspect of the embodiment is formed by packing a purifying agent made of a metal material containing magnesium in a bag, and is installed at a position in the cooling tower through which cooling water passes.

本開示によれば、簡易な構成で冷却水中のスケールの発生を抑制できるクーリングタワーの冷却水浄化方法、クーリングタワー、及び、クーリングタワー用浄化体を提供することができる。 According to the present disclosure, it is possible to provide a cooling water purification method for a cooling tower, a cooling tower, and a purification body for a cooling tower, which can suppress the generation of scale in cooling water with a simple configuration.

実施形態に係るクーリングタワーの概略構成図である。It is a schematic block diagram of the cooling tower which concerns on embodiment. 浄化体の他の設置例を示す図である。It is a figure which shows the other installation example of the purification body.

以下、添付図面を参照しながら実施形態について説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。 Hereinafter, embodiments will be described with reference to the accompanying drawings. In order to facilitate understanding of the description, the same components are designated by the same reference numerals as much as possible in each drawing, and duplicate description is omitted.

図１は、実施形態に係るクーリングタワー１の概略構成図である。図１に示すクーリングタワー１は、ビル空調や地域冷暖房設備である冷凍機等の熱交換器の冷却水を冷却するために用いられる装置であり、例えば建物の屋上等に設置される。クーリングタワー１の冷却方式は開放式と密閉式とがある。開放式とは、冷却水を冷やすための外気（空気）と冷却水とが直接接触し、冷却水の一部の蒸発によって残りの冷却水を冷やす冷却方式である。密閉式とは、冷却水を熱交換器の管内に通し、管外側に冷却用の外気と散布水を散水して冷却する方式である。図１の例では、開放式のクーリングタワー１が例示されている。 FIG. 1 is a schematic configuration diagram of a cooling tower 1 according to an embodiment. The cooling tower 1 shown in FIG. 1 is a device used for cooling cooling water of a heat exchanger such as a refrigerator, which is a building air conditioner or a district heating / cooling facility, and is installed on the roof of a building, for example. There are two types of cooling methods for the cooling tower 1: an open type and a closed type. The open type is a cooling method in which the outside air (air) for cooling the cooling water and the cooling water come into direct contact with each other, and the remaining cooling water is cooled by the evaporation of a part of the cooling water. The closed type is a method in which cooling water is passed through the pipe of a heat exchanger, and outside air for cooling and sprayed water are sprinkled on the outside of the pipe to cool the pipe. In the example of FIG. 1, an open type cooling tower 1 is illustrated.

図１に示すように、クーリングタワー１は、供給配管２と、ファン３と、滴下配管４と、熱交換部５と、排出配管９と、を備える。 As shown in FIG. 1, the cooling tower 1 includes a supply pipe 2, a fan 3, a dropping pipe 4, a heat exchange unit 5, and a discharge pipe 9.

供給配管２は、外部機器の熱交換器側で冷却に使用された後の温度の高い冷却水をタワー内部に供給する。供給配管２は、例えば図１に示すようにタワー下部から内部中央に向かい、さらにタワー上部に延在して配置される。 The supply pipe 2 supplies the high-temperature cooling water after being used for cooling on the heat exchanger side of the external device to the inside of the tower. As shown in FIG. 1, for example, the supply pipe 2 is arranged so as to extend from the lower part of the tower toward the center of the inside and further extend to the upper part of the tower.

ファン３は、タワー上部に設けられ、回転駆動することによって外気をタワー内部に導入する。 The fan 3 is provided in the upper part of the tower and introduces outside air into the tower by rotationally driving the fan 3.

滴下配管４は、タワー上部にて水平方向に延在して設けられる。滴下配管４は、供給配管２と接続されており、供給配管２から供給される冷却水をタワー内部で下方に滴下する。滴下配管４から流出された冷却水は、図１に示すように、タワー内部において冷却水を大気圧下で下方に自然落下させる自然落下流路１３を通る。 The dropping pipe 4 is provided so as to extend in the horizontal direction at the upper part of the tower. The dropping pipe 4 is connected to the supply pipe 2, and the cooling water supplied from the supply pipe 2 is dropped downward inside the tower. As shown in FIG. 1, the cooling water flowing out of the dropping pipe 4 passes through a free fall flow path 13 that naturally drops the cooling water downward under atmospheric pressure inside the tower.

熱交換部５は、滴下配管４の直下に配置され、滴下配管４から滴下された冷却水を通過させて、ファン３により導入された外気との間で熱交換を行い、冷却水を冷却する。熱交換部５では、外気と冷却水とが直接接触し、冷却水の一部の蒸発によって残りの冷却水が冷却される。また、熱交換部５は、例えば充填材を含み、水を滴状にして表面積の大きな充填材に流すことで、冷却水と外気の接触時間を長くして、冷却水を効率的に冷却することができる。 The heat exchange unit 5 is arranged directly under the dropping pipe 4, allows the cooling water dropped from the dropping pipe 4 to pass through, exchanges heat with the outside air introduced by the fan 3, and cools the cooling water. .. In the heat exchange unit 5, the outside air and the cooling water come into direct contact with each other, and the remaining cooling water is cooled by the evaporation of a part of the cooling water. Further, the heat exchange unit 5 contains, for example, a filler, and drops water into a filler having a large surface area to prolong the contact time between the cooling water and the outside air and efficiently cool the cooling water. be able to.

排出配管９は、タワー下部に接続され、熱交換部５を通過して冷却された冷却水をタワーから排出して外部機器の熱交換器側に供給する。排出配管９にはポンプ１１が設けられ、ポンプ１１を駆動することで、クーリングタワー１と外部機器の熱交換器との間で冷却水を循環させる。 The discharge pipe 9 is connected to the lower part of the tower, and discharges the cooled cooling water that has passed through the heat exchange unit 5 from the tower and supplies it to the heat exchanger side of the external device. A pump 11 is provided in the discharge pipe 9, and by driving the pump 11, cooling water is circulated between the cooling tower 1 and the heat exchanger of the external device.

また、排出配管９のポンプ１１より上流側には、Ｙ型ストレーナー１０が設けられる。Ｙ型ストレーナー１０は、流体中の異物やゴミをろ過するための例えば多孔タイプなどのスクリーンを内蔵し、そのスクリーン内に溜まった異物やゴミを、ストレーナー本体が配管に接続されたままの状態で、排除・清掃できる構造となっている。また、タワー内部に開口され排出配管９に接続される吐出口７には、同じく異物除去のためのフィルタ８が設けられる。 Further, a Y-type strainer 10 is provided on the upstream side of the discharge pipe 9 from the pump 11. The Y-type strainer 10 has a built-in screen such as a porous type for filtering foreign matter and dust in the fluid, and the foreign matter and dust accumulated in the screen are removed while the strainer body is connected to the pipe. , It has a structure that can be eliminated and cleaned. Further, a filter 8 for removing foreign matter is also provided at the discharge port 7 which is opened inside the tower and is connected to the discharge pipe 9.

さらに、タワー内部の冷却水の自然落下流路１３において、熱交換部５の下方にはスポンジ６が設けられる。スポンジ６は、例えば水平方向に延在する板状に形成され、熱交換部５を通過した冷却水を受けることができるよう、その上面が熱交換部５の底面とほぼ同等の面積で形成されている。スポンジ６は、冷却水を通過可能であると共に、冷却水の異物除去のためのフィルタ機能を有する。つまり本実施形態では、冷却水の流れに沿ってスポンジ６、フィルタ８、Ｙ型ストレーナー１０の順で３種類のフィルタが配置されている。異物除去効果を向上できるように、各フィルタの目の粗さは、スポンジ６が最大、フィルタ８が中間、Ｙ型ストレーナー１０が最小であるのが好ましい。 Further, in the free fall flow path 13 of the cooling water inside the tower, a sponge 6 is provided below the heat exchange section 5. The sponge 6 is formed, for example, in the shape of a plate extending in the horizontal direction, and its upper surface is formed in an area substantially equal to the bottom surface of the heat exchange portion 5 so that the cooling water that has passed through the heat exchange portion 5 can be received. ing. The sponge 6 is capable of passing through the cooling water and has a filter function for removing foreign matter from the cooling water. That is, in the present embodiment, three types of filters are arranged in the order of the sponge 6, the filter 8, and the Y-type strainer 10 along the flow of the cooling water. It is preferable that the sponge 6 has the maximum roughness, the filter 8 has the middle, and the Y-type strainer 10 has the minimum roughness so that the foreign matter removing effect can be improved.

そして特に本実施形態では、タワー内部の冷却水の自然落下流路１３において、スポンジ６の上面に浄化体１２（クーリングタワー用浄化体）が載置されている。浄化体１２は、冷却水が通過可能であり、通過した冷却水を改質して、冷却水内の成分に起因するスケールなどの異物の発生を抑制するためのものである。なお、本実施形態において冷却水からの発生を抑制する「異物」とは、水道水の含有成分が結晶化して析出される、水道水由来の物質を言い、例えばスケール、カルキ、水垢、湯垢を含む。以降の説明では、これらの異物を纏めて「スケール」とも表記する。 In particular, in the present embodiment, the purifying body 12 (purifying body for the cooling tower) is placed on the upper surface of the sponge 6 in the free fall flow path 13 of the cooling water inside the tower. The purifying body 12 is for allowing the cooling water to pass through and reforming the passed cooling water to suppress the generation of foreign substances such as scales due to the components in the cooling water. In the present embodiment, the "foreign substance" that suppresses the generation from the cooling water means a substance derived from tap water in which the components contained in tap water are crystallized and precipitated, for example, scale, scale, scale, and scale. Including. In the following description, these foreign substances are collectively referred to as "scale".

浄化体１２は、マグネシウムを含む金属材料から成る浄化剤が袋に詰められて構成される。浄化剤は、金属材料の切削加工で発生した切粉であるのが好ましい。袋は例えば不織布で形成されるのが好ましい。浄化剤が切粉である場合には、さまざまな大きさの金属片が含まれるため、浄化剤のうち微小な金属片が袋から冷却水内に流出しやすい。これに対して浄化体１２の袋を不織布にすれば、袋の隙間を少なくできるので、浄化剤が微小な金属片を含んでいても冷却水内に流出するのを防止できる。また、袋を複数枚重ねるのが好ましく、これにより微小金属片の冷却水への流出防止を促進できる。 The purifying body 12 is configured by packing a purifying agent made of a metal material containing magnesium in a bag. The purifying agent is preferably chips generated by cutting a metal material. The bag is preferably made of, for example, a non-woven fabric. When the purifying agent is chips, metal pieces of various sizes are included, so that minute metal pieces of the purifying agent easily flow out from the bag into the cooling water. On the other hand, if the bag of the purifying body 12 is made of non-woven fabric, the gap between the bags can be reduced, so that even if the purifying agent contains minute metal pieces, it can be prevented from flowing out into the cooling water. Further, it is preferable to stack a plurality of bags, which can promote the prevention of the outflow of the minute metal pieces into the cooling water.

浄化剤の金属材料は、マグネシウムまたはマグネシウム合金を含む。マグネシウム合金としては、Ｍｇ−Ａｌ−Ｚｎ系合金や、Ｍｇ−Ｚｎ−Ｚｒ系合金を含み、具体的にはＡＺ３１、ＡＺ９１Ｃ、ＡＺ９１Ｄなどを含む。 The metal material of the purifying agent includes magnesium or a magnesium alloy. Examples of the magnesium alloy include Mg-Al-Zn-based alloys and Mg-Zn-Zr-based alloys, and specifically, AZ31, AZ91C, AZ91D and the like.

本実施形態におけるクーリングタワーの冷却水浄化方法では、まず、マグネシウムを含む金属材料から成る浄化剤が袋に詰められた浄化体１２が作成される。なお、浄化体１２は市販品を購入するなど第三者から取得されてもよい。次に、浄化体１２が、クーリングタワー１内の冷却水が通過する位置、より詳細には、大気圧下で冷却水を自然落下させる自然落下流路１３上のスポンジ６の上部に設置される。そして、ポンプ１１が作動して冷却水がシステム内で循環されると、供給配管２、滴下配管４、熱交換部５を通過した冷却水が浄化体１２を通過する。 In the cooling water purification method for the cooling tower in the present embodiment, first, a purifying body 12 in which a purifying agent made of a metal material containing magnesium is packed in a bag is created. The purifying body 12 may be obtained from a third party, such as by purchasing a commercially available product. Next, the purifying body 12 is installed at a position in the cooling tower 1 through which the cooling water passes, more specifically, above the sponge 6 on the natural fall flow path 13 that naturally drops the cooling water under atmospheric pressure. Then, when the pump 11 operates and the cooling water is circulated in the system, the cooling water that has passed through the supply pipe 2, the dropping pipe 4, and the heat exchange unit 5 passes through the purifying body 12.

クーリングタワー１を循環する冷却水は、主に水道水が用いられる。このため、従来のクーリングタワーでは、長期間使用していると、水道水に含まれる炭酸カルシウムなどの成分が結晶化して、スケールが発生する。これらのスケールが、Ｙ型ストレーナー１０のスクリーンの孔や、吐出口７に設置されるフィルタ８の目を塞いで目詰まりを生じると、Ｙ型ストレーナー１０やフィルタ８を冷却水が通過しにくくなり、冷却水の流量が少なくなるため冷却性能が低下する虞がある。また、ポンプ１１への負荷が大きくなりポンプ故障の可能性が高くなる。 Tap water is mainly used as the cooling water that circulates in the cooling tower 1. Therefore, in the conventional cooling tower, when it is used for a long period of time, components such as calcium carbonate contained in tap water crystallize and scale is generated. If these scales block the holes in the screen of the Y-type strainer 10 and the eyes of the filter 8 installed in the discharge port 7 to cause clogging, it becomes difficult for the cooling water to pass through the Y-type strainer 10 and the filter 8. Since the flow rate of the cooling water is reduced, the cooling performance may be deteriorated. In addition, the load on the pump 11 becomes large, and the possibility of pump failure increases.

従来のクーリングタワーでは、スケールの影響を防ぐため、フィルタ類を定期的に清掃して異物を除去する作業が必要であり、作業負担やコストが大きかった。また、冷却水にスケール低減のための薬剤を投入する対策もあるが、薬剤がさらに高コストとなる。 In the conventional cooling tower, in order to prevent the influence of the scale, it is necessary to regularly clean the filters to remove foreign substances, which is a heavy work load and cost. There is also a measure to add a chemical for scale reduction to the cooling water, but the chemical becomes even more expensive.

これに対して本実施形態では、上記の手順によって、クーリングタワー１内の冷却水は、外部機器の熱交換器との間で循環させることによって自動的に浄化体１２を通過し、浄化体１２に含まれるマグネシウムとの反応によって改質される。これにより、クーリングタワー１内でスケールの発生を抑制できる。また、既存のクーリングタワー１に適用する際には、冷却水が通過する位置に浄化体１２を設置するだけで済むので、簡易な構成でスケール発生を抑制できる。スケール発生を抑制できると、クーリングタワー１の清掃の頻度を少なくでき、また、従来のようにスケール除去のために高価な薬剤を投入する必要もなくなるので、管理コストを低減できる。 On the other hand, in the present embodiment, according to the above procedure, the cooling water in the cooling tower 1 automatically passes through the purifying body 12 by circulating it with the heat exchanger of the external device, and becomes the purifying body 12. It is modified by reaction with the magnesium contained. As a result, the generation of scale can be suppressed in the cooling tower 1. Further, when applied to the existing cooling tower 1, it is only necessary to install the purifying body 12 at a position where the cooling water passes, so that scale generation can be suppressed with a simple configuration. If the generation of scale can be suppressed, the frequency of cleaning the cooling tower 1 can be reduced, and it is not necessary to add an expensive chemical for removing the scale as in the conventional case, so that the management cost can be reduced.

なお、本実施形態に係る浄化体１２を実際にクーリングタワーに設置して効果を検証する実験を行った。浄化体１２が無い場合には、２〜３か月程度でスケールによるフィルタの目詰まり等の不具合が発生した。これに対して、浄化体１２を設置した場合には、８か月経過した時点でもスケールは発生せず、フィルタ等の清掃も不要な状態を維持できていることが確認された。 An experiment was conducted in which the purifying body 12 according to the present embodiment was actually installed in the cooling tower to verify the effect. In the absence of the purifying body 12, problems such as clogging of the filter due to the scale occurred in about 2 to 3 months. On the other hand, it was confirmed that when the purifying body 12 was installed, no scale was generated even after 8 months had passed, and it was possible to maintain a state in which cleaning of the filter and the like was unnecessary.

マグネシウムを含む浄化体１２に冷却水を通過させることによってスケールの発生が抑制される理由を考察する。水がマグネシウムを通過すると、水とマグネシウムとの反応によって、下記の反応式（１）のように、水素とマグネシウムイオンと、水酸化物イオンとなり、水はアルカリ性に改質される。
Ｍｇ＋２Ｈ２Ｏ→２Ｈ２＋Ｍｇ２＋＋２ＯＨ− ・・・（１） The reason why the generation of scale is suppressed by passing the cooling water through the purifying body 12 containing magnesium will be considered. When water passes through magnesium, the reaction between water and magnesium results in hydrogen, magnesium ions, and hydroxide ions, as shown in the reaction formula (1) below, and the water is reformed to be alkaline.
Mg + 2H 2 O → 2H 2 + Mg 2+ + 2OH - ··· (1)

さらに、水道水に含まれる、スケールの主成分である炭酸カルシウムを考慮すると、水とマグネシウムと炭酸カルシウムの反応によって、下記の反応式（２）のように、水素とマグネシウムイオンと、水酸化物イオン、カルシウムイオンと、炭酸イオンに分解される。
Ｍｇ＋２Ｈ２Ｏ＋ＣａＣＯ３→
２Ｈ２＋Ｍｇ２＋＋２ＯＨ−＋Ｃａ２＋＋ＣＯ３ ２− ・・・（２） Furthermore, considering calcium carbonate, which is the main component of scale contained in tap water, hydrogen, magnesium ions, and hydroxide are produced by the reaction of water, magnesium, and calcium carbonate, as shown in the reaction formula (2) below. It is decomposed into ions, calcium ions, and carbonate ions.
Mg + 2H 2 O + CaCO 3 →
2H 2 + Mg 2+ + 2OH - + Ca 2+ + CO 3 2- ··· (2)

このように、改質後の冷却水では、スケールの主成分である炭酸カルシウムが、マグネシウムとの反応によってカルシウムイオンと、炭酸イオンとして存在しているので、炭酸カルシウムの析出が抑制でき、この結果、スケールの発生が抑制されると考えられる。なお、水道水由来の異物に係る他の成分でも、同様の理由により異物発生が抑制されると考えられる。 As described above, in the reformed cooling water, calcium carbonate, which is the main component of the scale, exists as calcium ions and carbonate ions by the reaction with magnesium, so that the precipitation of calcium carbonate can be suppressed, and as a result, the precipitation of calcium carbonate can be suppressed. , It is considered that the generation of scale is suppressed. It is considered that the generation of foreign substances is suppressed for the same reason with other components related to foreign substances derived from tap water.

また、本実施形態では、浄化体１２は大気圧下で冷却水が通過する位置に設置されるので、浄化体１２が冷却水の流れによって受ける負荷が少ない。例えばポンプ１１の下流側など高圧環境下に浄化体１２を設置すると、浄化体１２が冷却水の流れから受ける負荷が強く、例えば浄化体１２の袋が破れるなど浄化体１２が高圧下で破損しやすく、中身の浄化剤が冷却水内に流出するような事態が懸念されるが、本実施形態ではこのような事態の発生を防止できる。 Further, in the present embodiment, since the purifying body 12 is installed at a position where the cooling water passes under atmospheric pressure, the load received by the purifying body 12 due to the flow of the cooling water is small. For example, when the purifying body 12 is installed in a high pressure environment such as the downstream side of the pump 11, the purifying body 12 receives a strong load from the flow of cooling water, and the purifying body 12 is damaged under high pressure, for example, the bag of the purifying body 12 is torn. It is easy and there is a concern that the purifying agent inside may flow out into the cooling water, but in the present embodiment, the occurrence of such a situation can be prevented.

なお、本実施形態は、既存のクーリングタワーにおいても実施し得る。本実施形態では、浄化体１２は冷却水を大気圧下で自然落下させる自然落下流路１３上に設置され、より詳細には熱交換部５の下方のスポンジ６の上面に載置されるが、自然落下流路１３は冷却水と外気とを接触させる部分であって、既存のクーリングタワーでも空間が多く密閉されていない場合が多いので、浄化体１２を設置しやすい。これにより、浄化体１２を冷却水が通過する位置に設置する作業を簡易にできる。また、スポンジ６等が無いクーリングタワーであっても、冷却水の流路中のいずれかの場所に浄化体１２を置けば本実施形態と同様の効果を発揮できる。 The present embodiment can also be implemented in an existing cooling tower. In the present embodiment, the purifying body 12 is installed on the natural fall flow path 13 that naturally drops the cooling water under atmospheric pressure, and more specifically, it is placed on the upper surface of the sponge 6 below the heat exchange unit 5. The natural fall flow path 13 is a portion where the cooling water and the outside air come into contact with each other, and even in the existing cooling tower, there are many cases where the space is not sealed, so that the purifying body 12 can be easily installed. This makes it possible to simplify the work of installing the purifying body 12 at a position where the cooling water passes. Further, even in a cooling tower without a sponge 6 or the like, if the purifying body 12 is placed at any place in the flow path of the cooling water, the same effect as that of the present embodiment can be exhibited.

さらに、本実施形態と同様の効果を発揮し得る新たな要素を追加したクーリングタワーを作成して、本実施形態を実施することもできる。例えば、浄化体１２とスポンジ６とを組み合わせたユニットを新たにクーリングタワーに追加する構成や、複数個の浄化体１２を網状容器に収容して、クーリングタワー内の冷却水の流路上に配置する構成が挙げられる。 Further, the present embodiment can be implemented by creating a cooling tower to which a new element capable of exerting the same effect as the present embodiment is added. For example, a unit in which a purifying body 12 and a sponge 6 are combined is newly added to the cooling tower, or a plurality of purifying bodies 12 are housed in a mesh container and arranged on a flow path of cooling water in the cooling tower. Can be mentioned.

また、本実施形態では、浄化体１２に収容される浄化剤は、マグネシウムを含む金属材料の切削加工で発生した切粉であるので、浄化体１２のために新規に浄化剤を作成する必要がなく、切削加工の廃棄物を再利用することができ、より簡易かつ低コストで浄化体１２を作成できる。 Further, in the present embodiment, since the purifying agent contained in the purifying body 12 is chips generated by cutting a metal material containing magnesium, it is necessary to newly prepare a purifying agent for the purifying body 12. The waste of cutting can be reused, and the purifying body 12 can be produced more easily and at low cost.

さらに、浄化体１２に収容される浄化剤が切粉であると、金属材料の切削面が多いので、親水性を有する面が多く露出すると考えられる。これにより、水との反応を促進できると考えられる。 Further, when the purifying agent contained in the purifying body 12 is chips, it is considered that many surfaces having hydrophilicity are exposed because there are many cutting surfaces of the metal material. It is considered that this can promote the reaction with water.

なお、浄化体１２に使用する切粉は、切削加工で発生したものをそのまま袋に詰めてもよいし、切削加工で発生した大小さまざまなサイズの切粉をさらに細分化して、サイズを均す加工を施してから袋に詰めてもよい。 As the chips used for the purifying body 12, the chips generated by the cutting process may be packed in a bag as they are, or the chips generated by the cutting process of various sizes may be further subdivided to equalize the sizes. It may be processed and then packed in a bag.

また、クーリングタワー１内の冷却水を浄化体１２に通過させて改質することによって、従来のクーリングタワーで頻繁にみられていた藻の発生も抑制することができる。 Further, by passing the cooling water in the cooling tower 1 through the purifying body 12 to reform it, it is possible to suppress the generation of algae frequently observed in the conventional cooling tower.

図２は、浄化体１２Ａ〜１２Ｃの他の設置例を示す図である。上記実施形態では、冷却水を改質するための浄化体１２は、タワー内のスポンジ６の上面に載置されたが、浄化体１２の設置場所はこれに限られない。例えば、図２に浄化体１２Ａとして示すように、自然落下流路１３の他の位置でもよく例えば滴下配管４と熱交換部５との間に配置してもよい。また、図２に浄化体１２Ｂとして示すように、供給配管２内の流路に配置してもよいし、図２に浄化体１２Ｃとして示すように、排出配管９内の流路に配置してもよい。また、クーリングタワー１内の冷却水の流路上であれば、図２に例示した場所以外に浄化体を設置してもよい。 FIG. 2 is a diagram showing another installation example of the purifying bodies 12A to 12C. In the above embodiment, the purifying body 12 for reforming the cooling water is placed on the upper surface of the sponge 6 in the tower, but the installation location of the purifying body 12 is not limited to this. For example, as shown as the purifying body 12A in FIG. 2, it may be arranged at another position of the free fall flow path 13, for example, it may be arranged between the dropping pipe 4 and the heat exchange section 5. Further, it may be arranged in the flow path in the supply pipe 2 as shown as the purifier 12B in FIG. 2, or may be arranged in the flow path in the discharge pipe 9 as shown as the purifier 12C in FIG. May be good. Further, if it is on the flow path of the cooling water in the cooling tower 1, the purifying body may be installed in a place other than the place illustrated in FIG.

以上、具体例を参照しつつ本実施形態について説明した。しかし、本開示はこれらの具体例に限定されるものではない。これら具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素およびその配置、条件、形状などは、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。 The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those skilled in the art with appropriate design changes to these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-mentioned specific examples, its arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. The combinations of the elements included in each of the above-mentioned specific examples can be appropriately changed as long as there is no technical contradiction.

上記実施形態では、開放式のクーリングタワー１の一例を例示したが、本実施形態に係るクーリングタワーの構成は図１に例示した構成に限られない。また、本実施形態に係るクーリングタワーは、密閉式でもよい。 In the above embodiment, an example of the open type cooling tower 1 has been illustrated, but the configuration of the cooling tower according to the present embodiment is not limited to the configuration illustrated in FIG. Further, the cooling tower according to the present embodiment may be a closed type.

１ クーリングタワー
１２、１２Ａ、１２Ｂ、１２Ｃ 浄化体（クーリングタワー用浄化体）
１３ 自然落下流路 1 Cooling tower 12, 12A, 12B, 12C Purifier (cooling tower purifier)
13 Free fall flow path

本開示は、クーリングタワーの冷却水のスケール発生を抑制する方法に関する。 The present disclosure relates to suppress how the scale generation of the cooling water of the cooling tower.

本開示は、簡易な構成で冷却水中のスケールの発生を抑制できるクーリングタワーの冷却水のスケール発生を抑制する方法を提供することを目的とする。 The present disclosure is intended to provide an inhibit how the scale generation of the cooling water of a cooling tower which can suppress the occurrence of scale in the cooling water with a simple configuration.

本発明の実施形態の一観点に係るクーリングタワーの冷却水のスケール発生を抑制する方法は、クーリングタワー内を流れる冷却水のスケール発生を抑制する方法であって、マグネシウム及びマグネシウム合金の切削加工で発生したさまざまな大きさの金属片を不織布の袋に詰められた浄化体を、前記クーリングタワー内の熱交換器を通過して冷却された前記冷却水が大気圧下で自然落下する途中の位置に設置する。 Method of inhibiting scale formation in cooling water tower according to an aspect of an embodiment of the present invention is a method of inhibiting scale formation in cooling water flowing in the cooling tower, generated by cutting of magnesium and magnesium alloys establishing metal pieces of various sizes a purifier packed in a bag of nonwoven fabric, in the middle of a position where the cooling water cooled by passing through the heat exchanger in the cooling tower is free fall at atmospheric pressure ..

本開示によれば、簡易な構成で冷却水中のスケールの発生を抑制できるクーリングタワーの冷却水のスケール発生を抑制する方法を提供することができる。

According to the present disclosure, it is possible to provide a suppressing how the scale generation of the cooling water of a cooling tower which can suppress the occurrence of scale in the cooling water with a simple configuration.

Claims (6)

クーリングタワー内を流れる冷却水を浄化する方法であって、
マグネシウムを含む金属材料から成る浄化剤が袋に詰められた浄化体を前記クーリングタワー内の前記冷却水が通過する位置に設置する、
クーリングタワーの冷却水浄化方法。 It is a method of purifying the cooling water flowing in the cooling tower.
A purifying body in which a purifying agent made of a metal material containing magnesium is packed in a bag is installed at a position in the cooling tower through which the cooling water passes.
How to purify the cooling water of the cooling tower. 前記浄化体は、大気圧下で前記冷却水が通過する位置に設置される、
請求項１に記載のクーリングタワーの冷却水浄化方法。 The purifying body is installed at a position where the cooling water passes under atmospheric pressure.
The cooling water purification method for a cooling tower according to claim 1. 前記クーリングタワーは、前記冷却水を大気圧下で自然落下させる自然落下流路を含み、
前記浄化体は、前記自然落下流路上に設置される、
請求項２に記載のクーリングタワーの冷却水浄化方法。 The cooling tower includes a free fall flow path that allows the cooling water to fall naturally under atmospheric pressure.
The purifier is installed on the free fall flow path.
The cooling water purification method for a cooling tower according to claim 2. 前記浄化剤は、前記金属材料の切削加工で発生した切粉である、
請求項１〜３のいずれか１項に記載のクーリングタワーの冷却水浄化方法。 The purifying agent is chips generated by cutting the metal material.
The cooling water purification method for a cooling tower according to any one of claims 1 to 3. 冷却水が通過する位置に設置され、マグネシウムを含む金属材料から成る浄化剤が袋に詰められた浄化体を備える、
クーリングタワー。 It is equipped with a purifier that is installed in a position where cooling water passes and is packed with a purifying agent made of a metallic material containing magnesium.
cooling tower. マグネシウムを含む金属材料から成る浄化剤が袋に詰められて形成され、クーリングタワー内の冷却水が通過する位置に設置されるクーリングタワー用浄化体。 A purifying body for a cooling tower, which is formed by packing a purifying agent made of a metal material containing magnesium in a bag and installed at a position in the cooling tower through which cooling water passes.
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