JP2011111866A - Intake facility - Google Patents

Intake facility Download PDF

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JP2011111866A
JP2011111866A JP2009271995A JP2009271995A JP2011111866A JP 2011111866 A JP2011111866 A JP 2011111866A JP 2009271995 A JP2009271995 A JP 2009271995A JP 2009271995 A JP2009271995 A JP 2009271995A JP 2011111866 A JP2011111866 A JP 2011111866A
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water intake
seawater
intake
tank
shellfish
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JP5414481B2 (en
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Tadashi Suzuki
唯士 鈴木
Yoichi Sugiyama
陽一 杉山
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Chubu Electric Power Co Inc
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Chubu Electric Power Co Inc
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an intake facility which can be constructed at low cost without requiring a large scale apparatus and can efficiently collect shellfishes. <P>SOLUTION: The intake facility 1 which introduces seawater from the sea and store the seawater, precipitate and accumulate shellfishes and the like in the seawater, and then suck the seawater by a circulating water pump to supply it for cooling a generating apparatus comprises an intake chamber 2 for introducing and storing seawater, and the circulating water pump 3 for sucking the seawater in the intake chamber 2 to supply it to a condenser and the like of the generating apparatus. A shellfish storage vessel 17 for storing shellfishes is installed in the bottom of an almost center of the intake chamber 2. A wide plate-shaped curtain wall 10 is installed on the base end side than the shellfish storage vessel 17 (at the almost center of a gradually expanding portion 7). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、発電所において発電設備の冷却水として使用する海水を海から取り込んで貯留させるための取水設備に関するものである。   The present invention relates to water intake equipment for taking in and storing seawater used as cooling water for power generation equipment at a power plant.

火力発電所や原子力発電所等の発電所には、取水設備が併設されており、海から取水路を介して取水槽内に導かれた海水が、当該取水槽内で一時的に貯留された後に、循環水ポンプによって吸引されて、発電設備の復水器の冷却に供されるようになっている。ところが、海水中には、ムラサキイガイやフジツボ等の貝類が多く生息しており、取水設備が長期間に亘って使用されると、取水路に付着していた貝類が死滅して剥れ落ちて取水槽内に流下し、循環水ポンプ内へ流入してしまう、という事態が発生してしまう。かかる事態を防止するため、通常の取水槽には、塵芥処理用のスクリーンが設けられているが、貝類の大量堆積によってスクリーンが目詰まりし、発電に支障を来すことがある。   Power plants such as thermal power plants and nuclear power plants are equipped with water intake equipment, and seawater led from the sea through the intake channel into the intake tank was temporarily stored in the intake tank. Later, it is sucked by a circulating water pump and used for cooling the condenser of the power generation facility. However, there are many shellfish such as mussels and barnacles in the seawater. The situation where it flows down in a water tank and flows in into a circulating water pump will generate | occur | produce. In order to prevent such a situation, a normal water intake tank is provided with a screen for dust disposal. However, the screen may be clogged due to a large accumulation of shellfish, which may hinder power generation.

それゆえ、特許文献１の如く、スクリーンへの貝類の堆積を防止するために、２枚の平行な堰を水路に対して傾斜状に設け、それらの間を通過させた貝類を含有した海水を、ジェットポンプで吸引し、貝類をフィルタで回収した後に、再度、海水を水路に戻す方法が考案されている。   Therefore, as in Patent Document 1, in order to prevent the accumulation of shellfish on the screen, two parallel weirs are provided to be inclined with respect to the water channel, and the seawater containing the shellfish passed between them is provided. A method has been devised in which the seawater is returned to the water channel again after sucking with a jet pump and collecting shellfish with a filter.

特開平７−２２４４１８号公報JP-A-7-224418

しかしながら、上記の如く、貝類を含有した海水を、ジェットポンプで吸引して貝類を除去する方法は、大掛かりな装置が必要であるため、多大な費用を要するという欠点がある。   However, as described above, the method of sucking seawater containing shellfish with a jet pump to remove the shellfish requires a large-scale device, and thus has a drawback of requiring a great deal of cost.

本発明の目的は、上記従来の貝類除去方法の問題点を解消し、大掛かりな装置を必要とせず、安価に構築することができる上、貝類を効率良く回収することが可能な取水設備を提供することにある。   An object of the present invention is to provide a water intake facility that solves the problems of the conventional shellfish removal method, can be constructed at low cost without requiring a large-scale device, and can recover shellfish efficiently. There is to do.

本発明の内、請求項１に記載された発明は、基端に取水路が設けられた海水貯留用の取水槽と、その取水槽中の海水を吸引するために取水槽の先端に設けられた循環水ポンプとを有する取水設備であって、前記取水槽の底面に、貝類を貯留させるための凹状部分が設けられていることを特徴とするものである。   Among the present inventions, the invention described in claim 1 is provided at the distal end of a water intake tank for sucking seawater storage water intake tanks having a water intake channel provided at the base end and seawater in the water intake tank. A water intake facility having a circulating water pump, wherein a concave portion for storing shellfish is provided on the bottom surface of the water intake tank.

請求項２に記載された発明は、請求項１に記載された発明において、取水路が取水槽の先端よりも幅狭になっており、取水槽の凹状部分よりも基端側の底面が下向きに傾斜していることを特徴とするものである。   The invention described in claim 2 is the invention described in claim 1, wherein the intake channel is narrower than the distal end of the intake tank, and the bottom surface on the base end side is lower than the concave portion of the intake tank. It is characterized by being inclined.

請求項３に記載された発明は、請求項１、または請求項２に記載された発明において、取水槽の凹状部分よりも基端側に、取水槽内に入り込んだ海水の表面際の流れを制止するための幅広な板状のカーテンウォールが、取水槽の長手方向に対して直交するように鉛直に設けられていることを特徴とするものである。なお、カーテンウォールを、取水槽に貯留した海水の水面からカーテンウォールの下端までの長さ（Ｈ）が、取水路（取水槽の基端）における水深（Ｔ）の０．４倍以上０．６倍以下となるように構成すると、取水路を介して取水槽内に入り込んだ海水の表面際の流れを効率的に制止することができるので好ましい。   In the invention described in claim 3, in the invention described in claim 1 or 2, the flow of the seawater that has entered the intake tank is more proximal than the concave portion of the intake tank. A wide plate-like curtain wall for restraining is provided vertically so as to be orthogonal to the longitudinal direction of the water intake tank. The length (H) of the curtain wall from the surface of the seawater stored in the intake tank to the lower end of the curtain wall is 0.4 times or more the water depth (T) in the intake channel (base end of the intake tank). If it is configured to be 6 times or less, it is preferable because the flow near the surface of the seawater that has entered the intake tank through the intake channel can be efficiently stopped.

請求項１に記載の取水設備は、貝類を凹状部分内に堆積させることができるので、その凹状部分に堆積した貝類を定期的に除去するだけで、循環水ポンプの上流に設置されるスクリーンに貝類が堆積しないように、容易にメンテナンスすることができる。したがって、請求項１に記載の取水設備によれば、発電に支障を来す事態を効果的に防止することができる。   Since the water intake equipment according to claim 1 can deposit shellfish in the concave portion, the shell installed in the concave portion can be removed only by periodically removing the shellfish deposited in the concave portion. Maintenance can be easily performed so that shellfish do not accumulate. Therefore, according to the water intake equipment of the first aspect, it is possible to effectively prevent a situation in which power generation is hindered.

請求項２に記載の取水設備によれば、取水槽内に導かれた海水の流れを弱めて、貝類を凹状部分に均一に堆積させることができるので、低頻度のメンテナンスにより、スクリーンに貝類が堆積して発電に支障を来す事態を効果的に防止することができる。   According to the water intake facility of claim 2, since the flow of seawater introduced into the water intake tank can be weakened and the shellfish can be uniformly deposited on the concave portion, the shellfish can be kept on the screen by low-frequency maintenance. It is possible to effectively prevent the occurrence of problems that accumulate and interfere with power generation.

請求項３に記載の取水設備によれば、海面際の流れに伴って貝類が凹状部分に貯留することなくスクリーンの設置部位まで導かれる事態を阻止することができるので、スクリーンに貝類が堆積して発電に支障を来す事態を非常に効果的に防止することができる。   According to the water intake facility of the third aspect, it is possible to prevent the shellfish from being led to the installation site of the screen without accumulating in the concave portion along with the flow at the sea surface. Therefore, it is possible to prevent a situation that hinders power generation very effectively.

取水設備の概略を示す説明図（長手方向に沿った鉛直断面図）である。It is explanatory drawing (vertical sectional drawing along a longitudinal direction) which shows the outline of water intake equipment. 取水設備の概略を示す説明図（平面図）である。It is explanatory drawing (plan view) which shows the outline of water intake equipment. 小スケールの取水設備におけるＴ／Ｈに対する流速の分布を示す図表である。It is a graph which shows distribution of the flow velocity with respect to T / H in a small-scale water intake equipment. 小スケールの取水設備における貝類の堆積量の幅方向の分布を示す図表である。It is a graph which shows distribution of the width direction of the accumulation amount of shellfish in a small-scale water intake equipment.

以下、本発明に係る取水設備について、図面に基づいて詳細に説明する。   Hereinafter, water intake equipment according to the present invention will be described in detail based on the drawings.

図１、図２は、本発明に係る取水設備の概略を示したものである。取水設備１は、海から海水から導いて貯留させ、海水中の貝類等を沈殿、堆積させた後に、循環水ポンプによって吸引して、発電装置の冷却に供するものであり、海水を導入して貯留するための取水槽２、取水槽２中の海水を吸引して発電装置の復水器等へ供給するための循環水ポンプ３等によって構成されている。   1 and 2 show an outline of a water intake facility according to the present invention. The water intake facility 1 is derived from seawater and stored, and shellfish and the like in the seawater are precipitated and deposited, and then sucked by a circulating water pump to be used for cooling the power generation apparatus. A water intake tank 2 for storing, a circulating water pump 3 for sucking seawater in the water intake tank 2 and supplying it to the condenser of the power generation device, and the like.

取水槽２は、地面を凹状に掘削して、壁面をコンクリートで塗り固めることによって、上面を開口した縦長な箱形に施工されており、基端側（上流側）から先端側（下流側）にかけて、長さ約５００ｍの取水路４、長さ３７．４ｍの漸拡部７、長さ２０ｍの貝溜まり部１１、長さ２８．４ｍのポンプ室１２が設けられている（なお、図１は、取水路４の終端際の一部のみを示したものである）。   The intake tank 2 is constructed in a vertically long box shape with the upper surface opened by excavating the ground in a concave shape and solidifying the wall with concrete, from the base end side (upstream side) to the tip end side (downstream side) The intake channel 4 having a length of about 500 m, a gradually expanding portion 7 having a length of 37.4 m, a shell reservoir portion 11 having a length of 20 m, and a pump chamber 12 having a length of 28.4 m are provided (see FIG. 1). Shows only a part of the end of the intake channel 4).

取水路４（終端際の部分）は、８．５ｍの距離を隔てて平行に対峙した左右の側壁５ａ，５ｂと底板６とによって一定幅で一定深さの溝状に形成されている。そして、その取水路４の先端側に、漸拡部７が連設されている。漸拡部７は、長手方向に対して約１５°の角度を成して外向きに傾斜するように立設された左右の傾斜壁８ａ，８ｂと、水平面に対して約８°の角度を成して前下がりに傾斜した傾斜底板９とによって、基端側から先端側にかけて次第に幅広くかつ深くなるように形成されている。そして、漸拡部７の先端では、幅が２７．９ｍになっており、当該漸拡部７の先端に、同一幅の貝溜まり部１１およびポンプ室１２が連なった状態になっている。   The intake channel 4 (portion at the end) is formed in a groove shape having a constant width and a constant depth by left and right side walls 5a, 5b and a bottom plate 6 facing each other in parallel at a distance of 8.5 m. A gradually expanding portion 7 is continuously provided on the leading end side of the intake channel 4. The gradual expansion part 7 has an angle of about 8 ° with respect to the horizontal plane and the left and right inclined walls 8a and 8b that are erected so as to incline outward at an angle of about 15 ° with respect to the longitudinal direction. By the inclined bottom plate 9 that is inclined forward and downward, it is formed so as to become gradually wider and deeper from the proximal end side to the distal end side. And the width | variety is 27.9 m in the front-end | tip of the gradual expansion part 7, The shell reservoir part 11 and the pump chamber 12 of the same width are connected to the front-end | tip of the said gradual expansion part 7. FIG.

また、漸拡部７の略中央には、左側の傾斜壁８ａと右側の傾斜壁体８ｂとの間に、鉄筋入りのコンクリートによって形成された上下幅３．５ｍで横幅１８．２ｍの幅広な平板状のカーテンウォール１０が懸架されており、当該カーテンウォール１０の下端縁と傾斜底板９との間に、５．２ｍの隙間が形成された状態になっている。   In addition, at the approximate center of the gradual expansion portion 7, there is a wide width of 3.5 m in the vertical direction and 18.2 m in width between the left inclined wall 8 a and the right inclined wall body 8 b, which is formed of concrete with reinforcing bars. A flat curtain wall 10 is suspended, and a 5.2 m gap is formed between the lower end edge of the curtain wall 10 and the inclined bottom plate 9.

そして、上記した漸拡部７の先端側には、貝溜まり部１１が連設されている。貝溜まり部１１は、長手方向に沿って立設された左右の側壁１３ａ，１３ｂと、漸拡部７の傾斜底板９の先端より３ｍ下側に位置するように設けられた幅広で水平な底板１４と、当該底板１４の前後に平行に立設された前壁１５および後壁１６とによって構成されており、深さ３ｍの扁平で幅広な貝溜まり槽（凹状部分）１７が形成された状態になっている。   And the shell reservoir part 11 is continuously provided in the front end side of the above-mentioned gradual expansion part 7. FIG. The shell reservoir portion 11 has left and right side walls 13a and 13b erected along the longitudinal direction, and a wide and horizontal bottom plate provided so as to be located 3 m below the tip of the inclined bottom plate 9 of the gradually expanding portion 7. 14 and a front wall 15 and a rear wall 16 erected in parallel in front and rear of the bottom plate 14, and a state in which a flat and wide shell reservoir tank (concave portion) 17 having a depth of 3 m is formed. It has become.

一方、ポンプ室１２は、漸拡部７から連なった左右の側壁１３ａ，１３ｂと、水平な底板１８と、長手方向に対して垂直に立設された先端壁１９とによって閉塞されている。また、底板１８の前方には、３つのプレート２０，２０・・が、長手方向に沿って略等間隔に立設されており、それらのプレート２０，２０・・に跨るように、バケットスクリーン２０が長手方向に対して垂直となるように立設されている。当該バケットスクリーン２０は、回転可能なレールに、底面を金網とした複数のバケットを付設したものであり、レールを回転させることにより、後述するポンプ設置領域２３，２３・・に入り込んだ貝を掻き上げることができるようになっている。   On the other hand, the pump chamber 12 is closed by left and right side walls 13 a and 13 b that are continuous from the gradually expanding portion 7, a horizontal bottom plate 18, and a tip wall 19 that is erected perpendicular to the longitudinal direction. Further, in front of the bottom plate 18, three plates 20, 20... Are erected at substantially equal intervals along the longitudinal direction, and the bucket screen 20 extends over the plates 20, 20. Is erected so as to be perpendicular to the longitudinal direction. The bucket screen 20 includes a rotatable rail and a plurality of buckets with a metal mesh as the bottom surface. By rotating the rail, the shells that have entered the pump installation areas 23, 23,. Can be raised.

さらに、各プレート２０，２０・・に跨るように、断面（長手方向に沿った鉛直断面）Ｌ字状の仕切壁２２が設けられており、左右の側壁１３ａ，１３ｂとプレート２０との間、および、プレート２０同士の間に、４つのポンプ設置領域２３，２３・・が形成された状態になっている。そして、各ポンプ設置領域２３，２３・・においては、仕切壁２２の水平面を利用して循環水ポンプ３が設置されており、当該循環水ポンプ３，３・・の先端の開口部が、底板１８と対峙した状態になっている。   Furthermore, a cross-section (vertical cross section along the longitudinal direction) L-shaped partition wall 22 is provided so as to straddle each plate 20, 20... Between the left and right side walls 13 a, 13 b and the plate 20, In addition, four pump installation areas 23, 23,... Are formed between the plates 20. And in each pump installation area | region 23,23 ..., the circulating water pump 3 is installed using the horizontal surface of the partition wall 22, The opening part of the front-end | tip of the said circulating water pump 3, 3, ... is a bottom plate. 18 is in a state of facing.

＜取水設備の作用＞
取水設備１においては、海からの海水が取水路４を介して漸拡部７内に導入される。そして、取水路４（終端際の部分）の部分の水位が約４．０ｍとなる状態で使用される。その際に、漸拡部７の中央に設けられたカーテンウォール１０によって、海面際の海水の流れが堰き止められる。それゆえ、海水は、流勢が低減された状態で、カーテンウォール１０の下側から、取水槽２の内部へと入り込む。そして、海水がカーテンウォール１０の下側から取水槽２の内部に導かれる際には、海水に混じって入り込んだ貝等が、漸拡部７の傾斜底板９の上に落下し、海水の流れによって貝溜まり槽１７内に導かれる。そのように、貝類等が効率的に貝溜まり槽１７内に収容されるため、後方のスクリーン２１に貝類が堆積する事態が生じない。 <Operation of water intake equipment>
In the intake facility 1, seawater from the sea is introduced into the gradual expansion portion 7 through the intake channel 4. And it uses in the state from which the water level of the part of the intake channel 4 (part at the time of a termination | terminus) will be about 4.0 m. At that time, the flow of seawater near the sea surface is blocked by the curtain wall 10 provided in the center of the gradually expanding portion 7. Therefore, the seawater enters the intake tank 2 from the lower side of the curtain wall 10 in a state where the flow is reduced. And when seawater is guide | introduced into the intake tank 2 from the lower side of the curtain wall 10, the shellfish etc. which mixed in seawater fall on the inclination bottom board 9 of the gradual expansion part 7, and flow of seawater Is guided into the shell reservoir tank 17. As such, since shells and the like are efficiently accommodated in the shell reservoir 17, a situation in which shells accumulate on the rear screen 21 does not occur.

＜小スケールでの流況テスト＞
上記した取水設備１を１／１５のサイズに縮小した取水設備を施工した。そして、当該取水設備１において、カーテンウォール１０の設置深さを変化させた場合の所定水位での幅方向における流速の分布を測定した。流速分布の測定は、７１リットル/ｓで取水を実施しながら、貝溜まり槽１７の前端際の水深５ｍの高さにおける全幅を１３等分する１２箇所のポイントにおいて測定した。また、カーテンウォール１０の設置深さは、「取水路４における水深（Ｈ）」に対する「水面からカーテンウォール１０の下端までの長さ（Ｔ）」の割合（すなわち、Ｔ／Ｈ）が、０．３，０．４，０．５，０．６，０．７となるように変化させた（カーテンウォール１０の設置位置を変化させた）。そして、各Ｔ／Ｈ（０．３，０．４，０．５，０．６，０．７）における１２個ずつの流速のデータの標準偏差を下式によって算出した。また、比較のために、カーテンウォール１０を設置しなかった場合の流速の分布を同一条件にて測定し、同様な方法によって標準偏差を算出した。図３は、各Ｔ／Ｈに対して流速データの標準偏差Ｓ１ をプロットしたものであるが、かかる図３から、Ｔ／Ｈ＝０．３５〜０．６の範囲内で、流速の分布が非常に均一なものとなり（Ｓ１ ≦０．２５）、Ｔ／Ｈ＝０．４において、流速の分布が最も均一となり、貝溜まり槽１７内に貝が偏って堆積しにくくなることが分かる。 <Small scale flow test>
The water intake equipment which reduced the above-mentioned water intake equipment 1 to 1/15 size was constructed. And in the said water intake equipment 1, the distribution of the flow velocity in the width direction in the predetermined water level at the time of changing the installation depth of the curtain wall 10 was measured. The flow velocity distribution was measured at 12 points that divide the full width at a depth of 5 m at the front end of the shell reservoir 17 into 13 equal parts while taking water at 71 liter / s. The installation depth of the curtain wall 10 is such that the ratio of the “length (T) from the water surface to the lower end of the curtain wall 10” to the “water depth (H) in the intake channel 4” (ie, T / H) is 0. .3, 0.4, 0.5, 0.6, 0.7 (the installation position of the curtain wall 10 was changed). Then, the standard deviation of twelve flow velocity data at each T / H (0.3, 0.4, 0.5, 0.6, 0.7) was calculated by the following equation. For comparison, the flow velocity distribution when the curtain wall 10 was not installed was measured under the same conditions, and the standard deviation was calculated by the same method. Figure 3 is a plot of the standard deviation S 1 of the flow rate data for each T / H, from such Figure 3, within the range of T / H = 0.35 to 0.6, the distribution of flow velocity Is very uniform (S 1 ≦ 0.25), and at T / H = 0.4, the distribution of the flow velocity becomes the most uniform, and it is understood that the shellfish are unevenly deposited in the shell reservoir 17 and are difficult to deposit. .

Figure 2011111866
Figure 2011111866

＜小スケールでの貝類の堆積テスト＞
上記したスモールサイズの取水設備１を模擬貝（貝類と同等の沈降速度を有する珪砂６号）を使用して堆積テストを実施した。そして、模擬貝の移動が止まるのを確認した後、貝溜まり槽１７への貝類等の堆積量を、貝溜まり槽１７を幅方向に４つの領域（左岸、左岸中央、右岸中央、右岸）に分割して測定した。なお、測定に際しては、取水設備１のＴ／Ｈは０．４となるよう調整した。その貝類の堆積量の測定結果を図４に示す。図４から、貝類等が貝溜まり槽１７の全幅に亘って概ね均等に堆積したことが分かる。そのように貝類等が貝溜まり槽１７内に均等に堆積するため、取水装置１においては、長期間に亘って貝溜まり槽１７内から貝類等を除去する必要がない。 <Small scale shellfish accumulation test>
The above-described small-sized water intake facility 1 was subjected to a deposition test using a simulated shellfish (silica sand No. 6 having a sedimentation speed equivalent to that of shellfish). After confirming that the movement of the simulated shellfish stops, the amount of shellfish and the like deposited in the shell reservoir 17 is divided into four areas (left bank, left bank center, right bank center, right bank) in the width direction of the shell reservoir tank 17. Divided and measured. In the measurement, the T / H of the water intake facility 1 was adjusted to 0.4. FIG. 4 shows the measurement results of the amount of shellfish deposited. From FIG. 4, it can be seen that shellfish and the like are deposited almost uniformly over the entire width of the shell reservoir 17. As shellfish and the like are deposited evenly in the shell reservoir tank 17 as described above, the water intake device 1 does not need to remove the shellfish etc. from the shell reservoir tank 17 over a long period of time.

＜取水設備の効果＞
取水設備１は、上記の如く、取水槽２の底面に、貝類を貯留させるための凹状部分（貝溜まり槽１７）が設けられているため、貝類を凹状部分内に堆積させることができるので、その凹状部分に堆積した貝類を定期的に除去するだけで、循環水ポンプ３の上流に設置されるスクリーン２１に貝類が堆積しないように、容易にメンテナンスすることができる。したがって、取水設備１によれば、発電に支障を来す事態を効果的に防止することができる。 <Effects of water intake equipment>
Since the water intake facility 1 is provided with a concave portion (shell storage tank 17) for storing shellfish on the bottom surface of the water intake tank 2, as described above, shellfish can be deposited in the concave portion. Maintenance can be easily performed so that shells do not accumulate on the screen 21 installed upstream of the circulating water pump 3 simply by periodically removing the shells accumulated in the concave portion. Therefore, according to the water intake facility 1, it is possible to effectively prevent a situation in which power generation is hindered.

また、取水設備１は、取水路４が取水槽２の先端よりも幅狭になっており、取水槽２の凹状部分よりも基端側の底面（傾斜底板９）が下向きに傾斜しているため、取水槽２内に導かれた海水の流れを弱めて、貝類を凹状部分（貝溜まり槽１７）に均一に堆積させることができる。したがって、取水設備１によれば、低頻度のメンテナンスにより、スクリーン２１に貝類が堆積して発電に支障を来す事態を効果的に防止することができる。   Further, in the water intake facility 1, the intake channel 4 is narrower than the tip of the intake tank 2, and the bottom surface (inclined bottom plate 9) on the base end side with respect to the concave portion of the intake tank 2 is inclined downward. Therefore, the flow of the seawater introduced into the intake tank 2 can be weakened, and shellfish can be uniformly deposited in the concave portion (shell reservoir tank 17). Therefore, according to the water intake facility 1, it is possible to effectively prevent a situation where shells accumulate on the screen 21 and interfere with power generation due to low-frequency maintenance.

さらに、取水設備１は、取水槽２の凹状部分（貝溜まり槽１７）よりも基端側に、幅広な板状のカーテンウォール１０が、取水槽２の長手方向に対して直交するように鉛直に設けられているため、海面際の流れに伴って貝類が凹状部分に貯留することなくスクリーン２１の設置部位まで導かれる事態を阻止することができる。したがって、取水設備１によれば、スクリーン２１に貝類が堆積して発電に支障を来す事態を非常に効果的に防止することができる。   Further, the water intake facility 1 is vertically positioned so that a wide plate-like curtain wall 10 is orthogonal to the longitudinal direction of the water intake tank 2 on the proximal end side of the concave portion (shell reservoir 17) of the water intake tank 2. Therefore, it is possible to prevent the shellfish from being led to the installation site of the screen 21 without accumulating in the concave portion with the flow near the sea surface. Therefore, according to the water intake facility 1, it is possible to very effectively prevent the situation where shells accumulate on the screen 21 and interfere with power generation.

＜取水設備の変更例＞
なお、本発明に係る取水設備の構成は、上記実施形態の態様に何ら限定されるものではなく、取水槽、循環水ポンプ等の構成を、本発明の趣旨を逸脱しない範囲内で、必要に応じて適宜変更することができる。 <Example of water intake equipment change>
In addition, the structure of the water intake equipment according to the present invention is not limited to the aspect of the above-described embodiment, and the structure of the water intake tank, the circulating water pump, and the like is necessary within a range not departing from the gist of the present invention. It can be changed accordingly.

たとえば、取水槽は、貝溜まり槽より基端側の部分を、基端側から先端側にかけて次第に幅広くかつ深くなるように形成したものに限定されず、基端側から先端側にかけて次第に幅広になるように形成したもの（一定の深さを有するもの）や、基端側から先端側にかけて次第に深くなるように形成したもの（一定の幅を有するもの）等に変更することも可能である。また、取水槽は、カーテンウォールの下端縁と取水槽の底面とが離れているものに限定されず、等間隔に立設された金属棒等によってカーテンウォールの下端縁と取水槽の底面とを連結したもの等でも良い。   For example, the water intake tank is not limited to a part in which the base end side of the shell reservoir tank is formed to be gradually wider and deeper from the base end side to the front end side, and gradually becomes wider from the base end side to the front end side. It is also possible to change to those formed in such a way (those having a certain depth), those formed so as to become gradually deeper from the base end side to the tip end side (those having a certain width), and the like. The intake tank is not limited to the one where the lower end edge of the curtain wall and the bottom surface of the intake tank are separated from each other, and the lower end edge of the curtain wall and the bottom surface of the intake tank are connected by a metal rod or the like standing at equal intervals. What was connected may be sufficient.

本発明に係る取水設備は、上記の如く優れた機能を奏するものであるから、発電設備の冷却に供する海水を貯留するための設備として好適に用いることができる。   Since the water intake equipment according to the present invention has an excellent function as described above, it can be suitably used as equipment for storing seawater used for cooling the power generation equipment.

１・・取水設備
２・・取水槽
３・・循環水ポンプ
４・・取水路
９・・傾斜底板
１０・・カーテンウォール
１７・・貝溜まり槽（凹状部分） 1. ・ Intake equipment 2. ・ Intake tank 3. ・ Circulating water pump 4. ・ Intake channel 9. ・ Inclined bottom plate 10. ・ Curtain wall 17 ・ ・ Shell reservoir (concave part)

Claims (3)

基端に取水路が設けられた海水貯留用の取水槽と、その取水槽中の海水を吸引するために取水槽の先端に設けられた循環水ポンプとを有する取水設備であって、
前記取水槽の底面に、貝類を貯留させるための凹状部分が設けられていることを特徴とする取水設備。 A water intake facility having a water intake tank for storing seawater provided with a water intake channel at the base end, and a circulating water pump provided at the front end of the water intake tank to suck seawater in the water intake tank,
A water intake facility, wherein a concave portion for storing shellfish is provided on a bottom surface of the water intake tank. 取水路が取水槽の先端よりも幅狭になっており、取水槽の凹状部分よりも基端側の底面が下向きに傾斜していることを特徴とする請求項１に記載の取水設備。   The water intake facility according to claim 1, wherein the water intake channel is narrower than the tip of the water intake tank, and the bottom surface on the base end side is inclined downward from the concave portion of the water intake tank. 取水槽の凹状部分よりも基端側に、取水槽内に入り込んだ海水の表面際の流れを制止するための幅広な板状のカーテンウォールが、取水槽の長手方向に対して直交するように鉛直に設けられていることを特徴とする請求項１、または請求項２に記載の取水設備。   A wide plate-like curtain wall for restraining the flow of seawater that has entered the intake tank closer to the surface than the concave part of the intake tank is perpendicular to the longitudinal direction of the intake tank. The water intake equipment according to claim 1, wherein the water intake equipment is provided vertically.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014025236A (en) * 2012-07-26 2014-02-06 Chugoku Electric Power Co Inc:The Water intake facility
CN105275049A (en) * 2014-07-17 2016-01-27 上海勘测设计研究院有限公司 Sill structure capable of improving water quality of water intake and application method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0688317A (en) * 1992-09-08 1994-03-29 Mitsubishi Heavy Ind Ltd Device for removing shell in intake channel
JPH0687425U (en) * 1993-06-08 1994-12-22 三菱重工業株式会社 Intake tank
JP2005105720A (en) * 2003-09-30 2005-04-21 Chugoku Electric Power Co Inc:The Suspended curtain wall sealing plate assembly
JP2005146603A (en) * 2003-11-13 2005-06-09 Chugoku Electric Power Co Inc:The Sand pumping apparatus for hydraulic power plant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0688317A (en) * 1992-09-08 1994-03-29 Mitsubishi Heavy Ind Ltd Device for removing shell in intake channel
JPH0687425U (en) * 1993-06-08 1994-12-22 三菱重工業株式会社 Intake tank
JP2005105720A (en) * 2003-09-30 2005-04-21 Chugoku Electric Power Co Inc:The Suspended curtain wall sealing plate assembly
JP2005146603A (en) * 2003-11-13 2005-06-09 Chugoku Electric Power Co Inc:The Sand pumping apparatus for hydraulic power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014025236A (en) * 2012-07-26 2014-02-06 Chugoku Electric Power Co Inc:The Water intake facility
CN105275049A (en) * 2014-07-17 2016-01-27 上海勘测设计研究院有限公司 Sill structure capable of improving water quality of water intake and application method thereof

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