JP2012163266A - Installation method of eliminator of cooling tower - Google Patents

Installation method of eliminator of cooling tower Download PDF

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JP2012163266A
JP2012163266A JP2011024595A JP2011024595A JP2012163266A JP 2012163266 A JP2012163266 A JP 2012163266A JP 2011024595 A JP2011024595 A JP 2011024595A JP 2011024595 A JP2011024595 A JP 2011024595A JP 2012163266 A JP2012163266 A JP 2012163266A
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eliminator
tower
circulating water
cooling
filler
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JP5700531B2 (en
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Yasuhiro Katsuki
泰弘 香月
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JFE Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an installation method of an eliminator of a cooling tower, which facilitates inspection and cleaning of the eliminator and a filler inside the cooling tower.SOLUTION: The eliminator 21 is bridged in a groove shape (groove bottom 21a and groove side parts 21b) between upper ends 14a, 14a of side surfaces on an inner surface side (inner side of the tower) of a pair of right and left fillers 14 in a tower inner space 19. Air 17 passes through the eliminator after passing through the fillers 14.

Description

本発明は、冷却塔におけるエリミネータの設置方法に関するものである。   The present invention relates to a method for installing an eliminator in a cooling tower.

従来、空調設備や工業設備等の冷却機器の冷却水（循環水）を冷却するために、冷却塔が用いられている。冷却塔では、冷却水（循環水）を空冷することにより、循環水の温度を下げる。   Conventionally, cooling towers are used to cool cooling water (circulated water) of cooling equipment such as air conditioning equipment and industrial equipment. In the cooling tower, the temperature of the circulating water is lowered by air-cooling the cooling water (circulated water).

循環水の流量が１０００ｍ３／ｈを超える大型の冷却塔では、塔上部から循環水を散水するとともに、塔頂部に設置された冷却ファンにより塔内に空気を吸い込み、塔内で循環水と空気による熱交換を行い、循環水の温度を下げる方法が一般的である（例えば、特許文献１、２参照）。 In a large cooling tower where the flow rate of circulating water exceeds 1000 m 3 / h, circulating water is sprinkled from the top of the tower, and air is sucked into the tower by a cooling fan installed at the top of the tower. The method of lowering the temperature of circulating water by performing heat exchange by is generally used (see, for example, Patent Documents 1 and 2).

その際に、通常、塔内での熱交換効率をよくするために、塔内には充填材が設置されている。充填材には、循環水中のＳＳ濃度（浮遊物濃度）に応じて、フィルム型やスプラッシュ型等の種類があり、例えば、スプラッシュ型の充填材の場合には、散水された循環水を充填材によって小径粒子状に飛散させ、空気との接触を増加させるようにしている。   At that time, in order to improve the heat exchange efficiency in the tower, a packing material is usually installed in the tower. There are various types of fillers such as a film type and a splash type depending on the SS concentration (floating matter concentration) in the circulating water. For example, in the case of a splash type filler, the sprinkled circulating water is used as the filler. Is scattered in the form of small particles to increase contact with air.

そして、散水された循環水が熱交換した空気に同伴して冷却ファンから塔外に飛散しないように、エリミネータと呼ばれる邪魔板（フィルター）が塔内に設置されているのが一般的である。   A baffle plate (filter) called an eliminator is generally installed in the tower so that the sprinkled circulating water does not scatter from the cooling fan to the outside of the tower accompanying the heat-exchanged air.

図２は、そのような従来の冷却塔８０を示す縦断面図である。   FIG. 2 is a longitudinal sectional view showing such a conventional cooling tower 80.

図２に示すように、従来の冷却塔８０においては、塔頂部に設置された冷却ファン８８と、塔上部に設置された温水槽８２と、塔下部に設置された冷水槽８５と、温水槽８２と冷水槽８５の間に左右一対で設置された外形が略直方体の充填材８４とを備えており、温水槽８２から循環水８１（温水８１ａ）を充填材８４に向けて散水し、充填材８４を流下する循環水８１（温水８１ａ）と、冷却ファン８８によって塔内に導入されて充填材８４を通過する空気（外気）８７との間で熱交換をさせて、循環水８１（温水８１ａ）を冷却した後、冷却された循環水８１（冷水８１ｂ）を冷水槽８５に回収するようになっている。   As shown in FIG. 2, in the conventional cooling tower 80, the cooling fan 88 installed in the tower top part, the hot water tank 82 installed in the tower upper part, the cold water tank 85 installed in the tower lower part, and a hot water tank 82 and a cold water tank 85 are provided with a pair of left and right outer shape fillers 84 having a substantially rectangular parallelepiped shape, and circulating water 81 (hot water 81a) is sprinkled from the hot water tank 82 toward the filler 84 and filled. Heat is exchanged between the circulating water 81 (warm water 81a) flowing down the material 84 and the air (outside air) 87 introduced into the tower by the cooling fan 88 and passing through the filler 84, thereby circulating water 81 (warm water). After cooling 81 a), the cooled circulating water 81 (cold water 81 b) is recovered in the cold water tank 85.

その際、循環水８１（温水８１ａ）と熱交換して充填材８４を通過した後の空気８７は、左右を充填材８４で囲まれた塔内部空間８９を経由して冷却ファン８８から塔外に排出されるが、循環水８１が空気８７に同伴して冷却ファン８８から塔外に飛散しないように、それぞれの充填材８４の内面側（塔内部空間８９側）の側面全面にエリミネータ９１を設置している。   At that time, the air 87 after heat exchange with the circulating water 81 (warm water 81a) and passing through the filler 84 passes from the cooling fan 88 to the outside of the tower via the tower internal space 89 surrounded by the filler 84 on the left and right. In order to prevent the circulating water 81 from being scattered from the cooling fan 88 to the outside of the tower accompanying the air 87, an eliminator 91 is provided on the entire side face of each packing material 84 on the inner face side (tower internal space 89 side). It is installed.

エリミネータ９１はラビリンス構造になっており、空気８７は通過させるが、空気８７に同伴した循環水８１は捕捉して通過させないようになっている。すなわち、内部に壁があり、壁に循環水８１が衝突することにより、循環水８１の飛散を防止する構造となっている。   The eliminator 91 has a labyrinth structure and allows air 87 to pass therethrough, but prevents circulating water 81 accompanying the air 87 from passing through. That is, there is a wall inside, and the circulating water 81 collides with the wall, thereby preventing the circulating water 81 from scattering.

なお、左右のエリミネータ９１の中間で冷水槽８５の上面に点検歩廊９２が設置されている。   An inspection walkway 92 is installed on the upper surface of the cold water tank 85 between the left and right eliminators 91.

特開平１１−２８７５６８号公報JP-A-11-287568 特開２００１−３４９６９３号公報JP 2001-349893 A

しかし、図２に示したような従来の冷却塔８０においては、循環水８１が塔外に飛散しないように、エリミネータ９１を設置しているが、エリミネータ９１に循環水８１中の浮遊物が付着して通風効率が悪化して熱交換効率が低下し、冷水槽８５に回収された循環水（冷水）８１ｂの温度上昇を招く場合がある。   However, in the conventional cooling tower 80 as shown in FIG. 2, the eliminator 91 is installed so that the circulating water 81 is not scattered outside the tower, but the suspended matter in the circulating water 81 adheres to the eliminator 91. Then, the ventilation efficiency deteriorates, the heat exchange efficiency decreases, and the temperature of the circulating water (cold water) 81b collected in the cold water tank 85 may increase.

すなわち、従来の冷却塔８０においては、充填材８４とエリミネータ９１は１００ｍｍ程度しか離れておらず、冷却ファン８８により吸い込まれた空気８７の流れにより、循環水８１がエリミネータ９１に接触しやすいので、エリミネータ９１に浮遊物が堆積しやすい。   That is, in the conventional cooling tower 80, the filler 84 and the eliminator 91 are only separated by about 100 mm, and the circulating water 81 easily comes into contact with the eliminator 91 due to the flow of the air 87 sucked by the cooling fan 88. Suspended matter easily accumulates on the eliminator 91.

そこで、エリミネータ９１への浮遊物の付着状態（閉塞状況）を観測し、適宜エリミネータ９１に付着した浮遊物を除去することが必要になるが、充填材８４の内面側の側面全面にエリミネータ９１を設置しているのと、冷水槽８５の上面に点検歩廊９２を設置していることから、以下のような問題が生じている。   Therefore, it is necessary to observe the adhesion state (blocking condition) of the floating substance to the eliminator 91 and to remove the floating substance adhering to the eliminator 91 as appropriate. Since the inspection corridor 92 is installed on the upper surface of the cold water tank 85, the following problems arise.

（ａ）エリミネータ９１の高さが５ｍを超えるため、点検歩廊９２上でエリミネータ９１の閉塞状況を確認することが難しい。また、塔上部のエリミネータ９１が閉塞した場合には、浮遊物の除去作業に仮設足場等が必要になるため、除去作業（清掃作業）も容易ではない。   (A) Since the height of the eliminator 91 exceeds 5 m, it is difficult to check the blockage of the eliminator 91 on the inspection corridor 92. In addition, when the eliminator 91 at the top of the tower is blocked, a temporary scaffold or the like is required for the removal work of the suspended matter, and thus the removal work (cleaning work) is not easy.

（ｂ）エリミネータ９１は、内部に壁があり、壁に循環水８１が衝突することにより、循環水８１の飛散を防止する構造となっているため、循環水８１中の浮遊物が堆積しやすいので、ジェット洗浄等により浮遊物の除去を行いたいが、内部の壁構造が邪魔をして、片面からの洗浄では十分に浮遊物を除去するのが難しい。   (B) Since the eliminator 91 has a wall inside and the circulating water 81 collides with the wall to prevent the circulating water 81 from being scattered, suspended matter in the circulating water 81 is likely to accumulate. Therefore, it is desirable to remove suspended solids by jet washing or the like, but the internal wall structure interferes with it, and it is difficult to remove suspended solids sufficiently by washing from one side.

（ｃ）エリミネータ９１だけでなく、充填材８４も時間が経過すると、脱落、変形や浮遊物の堆積が生じるので、定期的に充填材８４を点検・清掃したいが、エリミネータ９１が邪魔して点検・清掃することが難しい。   (C) Not only the eliminator 91 but also the filling material 84 will drop, deform, and accumulate suspended matter over time, so it is necessary to check and clean the filling material 84 on a regular basis.・ It is difficult to clean.

（ｄ）そして、エリミネータ９１や充填材８４に浮遊物が堆積して除去できず、循環水（冷水）８１ｂの温度が許容上限値を超えるような場合には、そのエリミネータ９１や充填材８４を交換することになり、復帰までに長時間を要し、ダウンタイムを発生させてしまう。   (D) Then, in the case where suspended matter cannot be accumulated and removed from the eliminator 91 or the filler 84 and the temperature of the circulating water (cold water) 81b exceeds the allowable upper limit value, the eliminator 91 or the filler 84 is removed. It will be replaced, and it takes a long time to return, causing downtime.

本発明は、上記のような事情に鑑みてなされたものであり、冷却塔内部のエリミネータや充填材の点検・洗浄を容易にする、冷却塔におけるエリミネータの設置方法を提供することを目的とするものである。   The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for installing an eliminator in a cooling tower that facilitates inspection and cleaning of the eliminator and filler inside the cooling tower. Is.

前記課題を解決するために、本発明は以下の特徴を有する。   In order to solve the above problems, the present invention has the following features.

［１］塔頂部に設置された冷却ファンと、塔上部に設置された温水槽と、塔下部に設置された冷水槽と、前記温水槽と前記冷水槽の間に左右一対で設置された充填材とを備えた冷却塔において、エリミネータを左右一対の充填材の内面側の上端部間に架け渡すように設置することを特徴とする冷却塔におけるエリミネータの設置方法。   [1] A cooling fan installed at the top of the tower, a hot water tank installed at the top of the tower, a cold water tank installed at the bottom of the tower, and a pair of left and right installed between the hot water tank and the cold water tank In the cooling tower provided with the material, the eliminator is installed so as to be bridged between the upper ends of the inner surfaces of the pair of left and right fillers.

［２］前記エリミネータに点検歩廊を設けることを特徴とする前記［１］に記載の冷却塔におけるエリミネータの設置方法。   [2] The method for installing an eliminator in a cooling tower according to [1], wherein an inspection walkway is provided in the eliminator.

本発明においては、冷却塔内部のエリミネータや充填材の点検・洗浄が容易となる。その結果、エリミネータや充填材に浮遊物が付着・堆積して、空気と熱交換後の循環水（冷却水）の温度が上昇しても、エリミネータや充填材を付着・堆積した浮遊物を容易に除去して、迅速に復帰させることができる。特に、夏季等の冷却塔の負荷が高い時期には、その効果が一層大きくなる。   In the present invention, it becomes easy to check and clean the eliminator and the filler inside the cooling tower. As a result, even if suspended matter adheres and accumulates on the eliminator and filler, and the temperature of circulating water (cooling water) after heat exchange with air rises, suspended matter that adheres and accumulates on the eliminator and filler is easy. Can be quickly removed. In particular, when the load on the cooling tower is high, such as in summer, the effect becomes even greater.

本発明の一実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows one Embodiment of this invention. 従来技術を示す縦断面図である。It is a longitudinal cross-sectional view which shows a prior art.

本発明の一実施形態を図面に基づいて説明する。   An embodiment of the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態における冷却塔１０を示す縦断面図である。   FIG. 1 is a longitudinal sectional view showing a cooling tower 10 in one embodiment of the present invention.

図１に示すように、本発明の一実施形態における冷却塔１０は、塔頂部に設置された冷却ファン１８と、塔上部に設置された温水槽１２と、塔下部に設置された冷水槽１５と、温水槽１２と冷水槽１５の間に左右一対で設置された外形が略直方体の充填材１４とを備えており、温水槽１２から循環水１１（温水１１ａ）を充填材１４に向けて散水し、充填材１４を流下する循環水１１（温水１１ａ）と、冷却ファン１８によって塔内に導入されて充填材１４を通過する空気（外気）１７との間で熱交換をさせて、循環水１１（温水１１ａ）を冷却した後、冷却された循環水１１（冷水１１ｂ）を冷水槽１５に回収するようになっている。   As shown in FIG. 1, a cooling tower 10 according to an embodiment of the present invention includes a cooling fan 18 installed at the top of the tower, a hot water tank 12 installed at the top of the tower, and a cold water tank 15 installed at the bottom of the tower. And a filler 14 having a substantially rectangular parallelepiped outer shape installed between the hot water tank 12 and the cold water tank 15, and circulating water 11 (hot water 11 a) from the hot water tank 12 toward the filler 14. Water is exchanged between the circulating water 11 (warm water 11a) flowing down the filler 14 and the air (outside air) 17 introduced into the tower by the cooling fan 18 and passing through the filler 14 to circulate. After cooling the water 11 (hot water 11a), the cooled circulating water 11 (cold water 11b) is recovered in the cold water tank 15.

その際、循環水１１（温水１１ａ）と熱交換して充填材１４を通過した後の空気１７は、左右を充填材１４で囲まれた塔内部空間１９を経由して冷却ファン１８から塔外に排出されるが、循環水１１が空気１７に同伴して冷却ファン１８から塔外に飛散しないように、塔内部空間１９にエリミネータ２１を設置している。   At that time, the air 17 after exchanging heat with the circulating water 11 (warm water 11a) and passing through the filler 14 passes from the cooling fan 18 to the outside of the tower via the tower inner space 19 surrounded by the filler 14 on the left and right. However, the eliminator 21 is installed in the tower internal space 19 so that the circulating water 11 is not accompanied by the air 17 and scattered from the cooling fan 18 to the outside of the tower.

すなわち、図１に示すように、エリミネータ２１は、塔内部空間１９において、左右一対の充填材１４の内面側（塔内部側）の側面の上端部１４ａ、１４ａ間に溝形状（溝底部２１ａ、溝側部２１ｂ）に架け渡されており、充填材１４を通過した後の空気１７がそこを通過するようになっている。   That is, as shown in FIG. 1, the eliminator 21 has a groove shape (groove bottom portion 21a, between the upper end portions 14a, 14a on the inner surface side (tower inner side) of the pair of left and right packing materials 14 in the tower inner space 19. The air 17 after passing through the filler 14 passes through the groove side part 21b).

そして、エリミネータ２１はラビリンス構造になっており、空気１７は通過させるが、空気１７に同伴した循環水１１は捕捉して通過させないようになっている。すなわち、内部に壁があり、壁に循環水１１が衝突することにより、循環水１１の飛散を防止する構造となっている。   The eliminator 21 has a labyrinth structure and allows the air 17 to pass through, but prevents the circulating water 11 accompanying the air 17 from being captured and passed. That is, there is a wall inside, and the circulating water 11 collides with the wall, thereby preventing the circulating water 11 from scattering.

なお、エリミネータ２１の中間部（溝底部）２１ａの上面に点検歩廊２３が設置されている。また、冷水槽１５の上面にも点検歩廊２２が設置されている。   An inspection walkway 23 is installed on the upper surface of the intermediate part (groove bottom part) 21 a of the eliminator 21. An inspection walkway 22 is also installed on the upper surface of the cold water tank 15.

そして、エリミネータ２１の溝側部２１ｂと充填材１４との間には、点検歩廊２２や点検歩廊２３からエリミネータ２１の溝側部２１ｂと充填材１４を直接目視で点検できるような隙間が形成されている。   A gap is formed between the groove side portion 21b of the eliminator 21 and the filler 14 so that the groove side portion 21b of the eliminator 21 and the filler material 14 can be directly visually inspected from the inspection walkway 22 and the inspection walkway 23. ing.

なお、エリミネータ２１の輪郭（溝側部２１ｂ＋溝底部２１ａ＋溝側部２１ｂ）の長さＬは、充填材１４の高さＨの１．３倍〜１．７倍が好ましい。エリミネータ２１の長さＬが短すぎると通風抵抗が増加するからであり、エリミネータ２１の長さＬが長すぎると不経済であるからである。   The length L of the contour of the eliminator 21 (groove side portion 21b + groove bottom portion 21a + groove side portion 21b) is preferably 1.3 to 1.7 times the height H of the filler 14. This is because ventilation resistance increases if the length L of the eliminator 21 is too short, and it is uneconomical if the length L of the eliminator 21 is too long.

これによって、この実施形態においては、以下のような効果を得ることができる。   As a result, the following effects can be obtained in this embodiment.

（Ａ）エリミネータ２１と充填材１４が離れていることで、エリミネータ２１への浮遊物の付着量を低減することができる。   (A) Since the eliminator 21 and the filler 14 are separated from each other, the amount of suspended matter attached to the eliminator 21 can be reduced.

（Ｂ）エリミネータ２１の中間部の上面に点検歩廊２３が設置されているので、エリミネータ２１を直接目視で点検でき、浮遊物の付着・堆積等の異常を早期に検知できる。また、エリミネータ２１を上下からジェット洗浄することができ、短期間で効率的に洗浄することができる。   (B) Since the inspection walkway 23 is installed on the upper surface of the intermediate part of the eliminator 21, the eliminator 21 can be directly visually inspected, and abnormalities such as adhesion and accumulation of floating substances can be detected at an early stage. Further, the eliminator 21 can be jet-cleaned from above and below, and can be efficiently cleaned in a short period of time.

（Ｃ）充填材１４も直接目視で点検でき、充填材１４への浮遊物の付着・堆積等の異常を早期に検知できる。また、充填材１４も容易に洗浄が可能になる。   (C) The filler 14 can also be directly visually inspected, and abnormalities such as adhesion and accumulation of suspended matter on the filler 14 can be detected at an early stage. Further, the filler 14 can be easily cleaned.

本発明の実施例として、上記の本発明の一実施形態を含油循環水設備の冷却塔に適用した。なお、循環水量（冷却水量）は１８００ｍ３／ｈであった。 As an example of the present invention, one embodiment of the present invention described above was applied to a cooling tower of an oil-containing circulating water facility. The circulating water amount (cooling water amount) was 1800 m 3 / h.

その結果、夏季に、エリミネータの閉塞等によって、冷却塔から供給される循環水（冷却水）の温度が３５℃に上昇しても、半日の清掃で３２℃に低下させることができた。   As a result, even if the temperature of the circulating water (cooling water) supplied from the cooling tower rose to 35 ° C. due to the blockage of the eliminator and the like in summer, it could be lowered to 32 ° C. by half-day cleaning.

１０ 冷却塔
１１ 循環水
１１ａ 循環水（温水）
１１ｂ 循環水（冷水）
１２ 温水槽
１４ 充填材
１５ 冷水槽
１７ 空気
１８ 冷却ファン
１９ 塔内部空間
２１ エリミネータ
２２ 点検歩廊
２３ 点検歩廊
８０ 冷却塔
８１ 循環水
８１ａ 循環水（温水）
８１ｂ 循環水（冷水）
８２ 温水槽
８４ 充填材
８５ 冷水槽
８７ 空気
８８ 冷却ファン
８９ 塔内部空間
９１ エリミネータ
９２ 点検歩廊 10 Cooling tower 11 Circulating water 11a Circulating water (hot water)
11b Circulating water (cold water)
DESCRIPTION OF SYMBOLS 12 Hot water tank 14 Filler 15 Cold water tank 17 Air 18 Cooling fan 19 Tower internal space 21 Eliminator 22 Inspection walkway 23 Inspection walkway 80 Cooling tower 81 Circulating water 81a Circulating water (hot water)
81b Circulating water (cold water)
82 Hot water tank 84 Filling material 85 Cold water tank 87 Air 88 Cooling fan 89 Tower internal space 91 Eliminator 92 Inspection walkway

Claims (2)

塔頂部に設置された冷却ファンと、塔上部に設置された温水槽と、塔下部に設置された冷水槽と、前記温水槽と前記冷水槽の間に左右一対で設置された充填材とを備えた冷却塔において、エリミネータを左右一対の充填材の内面側の上端部間に架け渡すように設置することを特徴とする冷却塔におけるエリミネータの設置方法。   A cooling fan installed at the top of the tower, a hot water tank installed at the top of the tower, a cold water tank installed at the lower part of the tower, and a pair of fillers installed between the hot water tank and the cold water tank. An installation method for an eliminator in a cooling tower, wherein the eliminator is installed so as to be bridged between upper ends of inner surfaces of a pair of left and right fillers. 前記エリミネータに点検歩廊を設けることを特徴とする請求項１に記載の冷却塔におけるエリミネータの設置方法。   The method for installing an eliminator in a cooling tower according to claim 1, wherein an inspection walkway is provided in the eliminator.
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JP2016080312A (en) * 2014-10-21 2016-05-16 株式会社神鋼環境ソリューション cooling tower
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KR102217511B1 (en) * 2019-09-09 2021-02-19 주식회사 경인기계 Plume abatement cooling tower

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KR102217511B1 (en) * 2019-09-09 2021-02-19 주식회사 경인기계 Plume abatement cooling tower

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