JP4122957B2 - Filtration method and equipment for water containing sedimentary suspension - Google Patents

Filtration method and equipment for water containing sedimentary suspension Download PDF

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JP4122957B2
JP4122957B2 JP2002356945A JP2002356945A JP4122957B2 JP 4122957 B2 JP4122957 B2 JP 4122957B2 JP 2002356945 A JP2002356945 A JP 2002356945A JP 2002356945 A JP2002356945 A JP 2002356945A JP 4122957 B2 JP4122957 B2 JP 4122957B2
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water
supply pipe
water supply
filtration device
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JP2004188270A (en
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晶 飯村
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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、冷却水系等の沈降性懸濁物含有水を効率的に濾過する方法と設備に関する。
【０００２】
【従来の技術】
ビル空調又は工業プラント等において発生する熱を冷却するための循環冷却水系では、熱交換器で負荷の冷却を行うことにより高温となった冷却水を冷却塔に導いて冷却し、これに補給水を補給して再び熱交換器において負荷の冷却を行うように循環している。このような循環冷却水系では、冷却塔において冷却水が蒸発することにより濃縮され、塩類濃度が高くなると共に、大気中から混入した腐食性物質や菌類、その他の不純物も蓄積、濃縮される。従って、このような冷却水系、特に開放循環冷却水系の高濃縮運転では、冷却水の水質が悪化し、細菌、かび、藻類などの微生物群に土砂、塵埃などが混ざり合って形成されるスライムが発生しやすくなり、熱交換器における熱効率の低下が起きる。また、塩類濃度の上昇で水系内に析出した炭酸カルシウムやシリカが堆積し、冷却水循環ポンプの閉塞を生じ、通水の悪化をもたらす。
【０００３】
このため、このようなスライムやスラッジによる障害を防止するために、一般に、濾過装置（サイドフィルタ）を冷却水系内に設置し、冷却水の一部を濾過することにより、スライム、スラッジ及びその原因となる各種の不純物を除去することが行われている。
【０００４】
【発明が解決しようとする課題】
しかし、除去対象となる水系内のスライムやスラッジ、その他の不純物には、水中に懸濁しているものもあるが、系内で堆積しているものも多い。一方で、冷却水の一部を濾過装置に供給して濾過する方法では、水中に懸濁している濁度成分を除去することは可能であるが、水系内の堆積物を除去することはできない。
【０００５】
水系内の汚染物質の除去効率を高めるために、濾過装置への通水量を増加させたり、濾過装置の濾過径を細かくしたりすることも行われているが、これらの方法では、水中に懸濁している濁度成分の除去効率は高められるものの、水系内に堆積するスライムやスラッジ、その他の不純物を除去することはできない。
【０００６】
本発明は上記従来の問題点を解決し、冷却水系等において、系内で堆積している沈降性懸濁物をも濾過装置で効率的に濾過して除去することができる沈降性懸濁物含有水の濾過方法及び濾過設備を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明の沈降性懸濁物含有水の濾過方法は、沈降性懸濁物を含む水を水槽に導入し、該水槽内の水を給水配管を介して濾過装置に供給して濾過する方法において、該給水配管として該水槽内を移動可能な可動式の給水配管を設け、該可動式の給水配管により、該水槽内の水及び堆積物を該濾過装置に供給する沈降性懸濁物含有水の濾過方法であって、該給水配管として、更に、固定設置された固定式の給水配管が設けられており、該水槽内の水を該固定式の給水配管と該可動式の給水配管とで該濾過装置に供給する沈降性懸濁物含有水の濾過方法であり、該濾過装置の給水配管の先端側が、前記固定式の給水配管と可動式の給水配管とに分岐しており、該水槽は、循環冷却水系の冷却塔の下部水槽であり、該濾過装置の濾材の逆洗を行い、循環冷却水のブローを兼ねて逆洗排水を系外へ排出することを特徴とする。
【０００８】
本発明の沈降性懸濁物含有水の濾過設備は、沈降性懸濁物を含む水が導入される水槽と、該水槽内の水が給水配管を介して供給される濾過装置とを備える設備において、該給水配管として該水槽内を移動可能な可動式の給水配管を設け、該可動式の給水配管により、該水槽内の水及び堆積物を該濾過装置に供給可能とした沈降性懸濁物含有水の濾過設備であって、該給水配管として、更に、固定設置された固定式の給水配管が設けられており、該水槽内の水を該固定式の給水配管と該可動式の給水配管とで該濾過装置に供給可能とした沈降性懸濁物含有水の濾過設備であり、該濾過装置の給水配管の先端側が、前記固定式の給水配管と可動式の給水配管とに分岐しており、該水槽は、循環冷却水系の冷却塔の下部水槽であり、該濾過装置は、循環冷却水のブロー配管を兼ねる濾材の逆洗排水の排出配管を有することを特徴とする。
【０００９】
本発明によれば、可動式の給水配管を水槽内のスラッジ等の堆積部付近に移動させ、この給水配管の給水口を直接スラッジ等の堆積部分に挿入して給水することにより、水槽内の堆積物をも効率的に濾過装置に供給し、これを濾過して系外に排除することができる。
【００１０】
本発明では、濾過装置への給水配管として、可動式の給水配管と固定式の給水配管とを備えることにより、効率的な給水を行って、水中に懸濁している濁度成分と水槽内に堆積している汚染物質とを共に効率的に濾過、除去することが可能である。
【００１１】
このような本発明の濾過方法及び濾過設備は、特に、冷却水系の処理に好適である。
【００１２】
【発明の実施の形態】
以下、図面を参照して本発明の沈降性懸濁物含有水の濾過方法及び濾過設備の実施の形態を詳細に説明する。
【００１３】
図１は本発明の実施の形態に係る沈降性懸濁物含有水の濾過設備を備えた循環冷却水系を示す系統図である。
【００１４】
冷却塔１において、散水管１ａから散水された冷却水は、充填材層１ｂを流下する間にルーバ１ｃから導入される空気と接触して冷却され、下部水槽（ピット）１ｄに冷却水として貯留される。蒸気を含む空気はファン１ｅにより大気中に排気される。
【００１５】
水槽１ｄ内の冷却水は、水槽１ｄの底部からポンプＰ１により抜き出され、冷却水供給用配管１１より熱交換器２に送給される。熱交換器２で熱交換して加熱された水は、戻り配管１２より冷却塔１に戻され、冷却され、循環使用される。なお、水槽１ｄの底部の冷却水の抜出口には、水槽１ｄ内のスラッジ等の堆積物が循環配管１１に流入しないように、ストレーナ１ｆが設けられている。１３は、この冷却水系への補給水の導入配管である。
【００１６】
この実施の形態では、冷却塔１の水槽１ｄから、給水配管１４Ａ，１４Ｂ，１４及びポンプＰ２により冷却水を抜き出し、濾過装置（サイドフィルタ）３で濾過して懸濁成分を除去した後、濾過水を配管１５より水槽１ｄに戻すように構成している。この濾過装置３としては、特に制限はないが、例えば、砂、アンスラサイト等の粒状濾材を充填した濾過層を設けたものが用いられ、上向流で濾過するものでも、下向流で濾過するものでもよい。なお、この濾過装置３では、濾過の継続により濾過層が目詰まりするので、濾材の逆洗を行い、循環冷却水のブローを兼ねて逆洗排水を配管１６より系外へ排出する。
【００１７】
濾過装置３の給水配管１４の先端側は、固定式の給水配管（以下「固定式サクション部」と称す場合がある。）１４Ａと可動式の給水配管（以下「可動式サクション部」と称す場合がある。）１４Ｂとに分岐しており、固定式サクション部１４Ａは、水槽１ｄの任意の箇所に固定されている。一方、可動式サクション部１４Ｂは、開閉バルブＶを備え、その先端側は可撓性のホース（例えば、ブレードホース等）で構成される。
【００１８】
図１に示す冷却水系では、例えば、固定式サクション部１４Ａから常時一定量の冷却水を濾過装置３に給水して濾過すると共に、必要に応じて不定期的に或いは定期的に可動式サクション部１４Ｂから冷却水を濾過装置３に給水して濾過する。可動式サクション部１４Ｂからも取水するときには、バルブＶを開とすると共に、水槽１ｄの底部のうち、特にスラッジ等の堆積物の多い箇所に可動式サクション部１４Ｂを移動させ、この堆積物中に可動式サクション部１４Ｂの先端給水口を差し込むことにより、水槽１ｄ底部の堆積物を冷却水と共に濾過装置３に給水する。このように、可動式サクション部１４Ｂを移動させて水槽１ｄの底部堆積物を濾過装置３に送給することにより、固定式サクション部１４Ａのみによる給水では除去し得ない堆積物を効率的に濾過装置３で濾過して系外へ排出することができるようになる。
【００１９】
この可動式サクション部１４Ｂによる取水は、冷却水系の運転状況や濃縮倍率等によっても異なるが、７〜１４日に１回、１〜２時間程度行えば十分な効果を得ることができる。ただし、常時可動式サクション部１４Ｂによって取水を行ってもよい。
【００２０】
なお、図１は、本発明を冷却水の濾過処理に適用した場合の実施の形態を示すものである。また、濾過装置としても特に制限はなく、前述の濾材充填層を設けたものの他、膜分離装置、遠心濾過機（サイクロンフィルター）等を用いることもできる。
【００２１】
【実施例】
以下に実施例及び比較例を挙げて本発明をより具体的に説明する。
【００２２】
実施例１
図１に示す如く、保有水量３ｍ３、循環水量１００ｍ３／ｈの冷却塔に濾過装置（濾過水量５ｍ３／ｈ）を設置し、固定式サクション部と可動式サクション部を設けた。固定式サクション部からの給水は連続に行い、可動式サクション部からの給水は１ｍ３／ｈで１週間に１回、１時間とした。可動式サクション部は目視でスラッジ堆積が顕著な箇所に移動させて適宜給水した。固定式サクション部からの給水量は５ｍ３／ｈであるが、可動式サクション部からの給水を行っているとき４ｍ３／ｈとなった。
【００２３】
冷却水系を２ヶ月間運転し、２ヶ月後に水系内に堆積したスラッジの乾燥重量を、糸巻きフィルターで全量濾過し、濾過後のフィルターの乾燥重量の増加値を測定することにより求めた結果、２ｋｇであり、循環水ポンプの流量低下は認められなかった。
【００２４】
比較例１
実施例１において、濾過装置による濾過を行わなかったこと以外は同様にして冷却水系を２ヶ月間運転したところ、２ヶ月後に水系内に堆積したスラッジの乾燥重量は２５ｋｇであり、スラッジが循環水ポンプストレーナを閉塞し、循環水流量は２０％低下していた。
【００２５】
比較例２
実施例１において、濾過装置への給水を固定式サクション部のみで行ったこと以外は同様にして冷却水系を２ヶ月間運転したところ、２ヶ月後に水系内に堆積したスラッジの乾燥重量は２０ｋｇであり、スラッジが循環水ポンプストレーナを閉塞し、循環水流量は１５％低下していた。
【００２６】
【発明の効果】
以上詳述した通り、本発明の沈降性懸濁物含有水の濾過方法及び濾過設備によれば、水中に懸濁している濁度成分のみならず、系内に堆積している懸濁物質をも濾過装置に供給してこれらを効率的に系外へ排出することができる。
【００２７】
このような本発明の濾過方法及び濾過設備は、特に、冷却水系の水処理に好適であり、冷却塔の水槽内の沈降性懸濁物含有水を可動式のサクション部と固定式のサクション部とで濾過装置に給水して、水中の懸濁成分のみならず、系内に堆積しているスライムやスラッジ、その他の汚染物質をも効率的に除去することにより、冷却水系の通水障害や熱効率の低下を防止して、長期に亘り安定運転を継続することが可能となる。
【図面の簡単な説明】
【図１】 本発明の実施の形態に係る沈降性懸濁物含有水の濾過設備を備えた循環冷却水系を示す系統図である。
【符号の説明】
１ 冷却塔
２ 熱交換器
３ 濾過装置
１４Ａ 固定式の給水配管（固定式サクション部）
１４Ｂ 可動式の給水配管（可動式サクション部）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and equipment for efficiently filtering water containing sedimentary suspension such as a cooling water system.
[0002]
[Prior art]
In a circulating cooling water system for cooling heat generated in a building air conditioner or an industrial plant, the cooling water that has become hot by cooling the load with a heat exchanger is led to a cooling tower to be cooled, and this is supplemented with water. Is circulated so that the load is cooled again in the heat exchanger. In such a circulating cooling water system, the cooling water is concentrated by evaporating in the cooling tower, the salt concentration is increased, and corrosive substances, fungi and other impurities mixed from the atmosphere are also accumulated and concentrated. Therefore, in the high concentration operation of such a cooling water system, particularly an open circulation cooling water system, the quality of the cooling water is deteriorated, and slime formed by mixing soil, dust, etc. with microorganisms such as bacteria, fungi, and algae. It becomes easy to generate | occur | produce and the thermal efficiency in a heat exchanger falls. In addition, calcium carbonate and silica deposited in the water system due to an increase in the salt concentration are accumulated, causing the cooling water circulation pump to be clogged, resulting in deterioration of water flow.
[0003]
For this reason, in order to prevent such troubles due to slime and sludge, generally, a filtering device (side filter) is installed in the cooling water system, and a part of the cooling water is filtered to thereby reduce the slime, sludge and its cause. Various impurities are removed.
[0004]
[Problems to be solved by the invention]
However, some slime, sludge, and other impurities in the water system to be removed are suspended in water, but many are deposited in the system. On the other hand, in the method of supplying a part of the cooling water to the filtration device and filtering, it is possible to remove the turbidity component suspended in the water, but it is not possible to remove the sediment in the aqueous system. .
[0005]
In order to increase the removal efficiency of contaminants in the water system, the amount of water passing through the filtration device is increased or the filtration diameter of the filtration device is made finer. Although the removal efficiency of the turbid turbidity component can be improved, slime, sludge and other impurities deposited in the water system cannot be removed.
[0006]
The present invention solves the above-mentioned conventional problems, and in a cooling water system or the like, a sedimentary suspension capable of efficiently filtering and removing sedimentary suspension accumulated in the system by a filtration device. It aims at providing the filtration method and filtration equipment of contained water.
[0007]
[Means for Solving the Problems]
In the method for filtering water containing sedimentary suspension of the present invention, water containing sedimentary suspension is introduced into a water tank, and the water in the water tank is supplied to a filtration device via a water supply pipe and filtered. A movable water supply pipe that can move in the water tank is provided as the water supply pipe, and water and sediment in the water tank are supplied to the filtration device by the movable water supply pipe. The water supply pipe is further provided with a fixed and fixed water supply pipe, and the water in the water tank is divided into the fixed water supply pipe and the movable water supply pipe. A method for filtering settled suspension-containing water to be supplied to the filtration device, wherein a front end side of a water supply pipe of the filtration device is branched into the fixed water supply pipe and a movable water supply pipe, and the water tank Is a lower water tank of the cooling tower of the circulating cooling water system, and the filter medium of the filtration device is backwashed to circulate. Characterized by discharging the backwash effluent serves as the blowing of the cooling water out of the system.
[0008]
The filtration facility for water containing sedimentary suspension of the present invention comprises a water tank into which water containing sedimentation suspension is introduced, and a filtration device to which the water in the water tank is supplied via a water supply pipe. A movable water supply pipe movable in the water tank is provided as the water supply pipe, and the movable suspension water supply pipe allows the water and sediment in the water tank to be supplied to the filtration device. In addition to the water supply pipe, a fixed water supply pipe that is fixedly installed is provided, and water in the water tank is supplied with the fixed water supply pipe and the movable water supply. A water-containing facility for precipitating suspended solids that can be supplied to the filtration device through a pipe, and the water supply pipe tip side of the filtration device branches into the fixed water supply pipe and the movable water supply pipe. and, the water tank is lower water tank of the cooling tower circulating cooling water system, the filtration device, And having a discharge pipe of the backwash effluent of the filter medium also serving as a blow pipe ring cooling water.
[0009]
According to the present invention, the movable water supply pipe is moved to the vicinity of the accumulation portion such as sludge in the water tank, and the water supply port of this water supply pipe is directly inserted into the accumulation portion such as sludge to supply water. Deposits can also be efficiently supplied to the filtration device, which can be filtered out of the system.
[0010]
In the present invention, as the water supply pipe to the filtration device, and more and this and a stationary water supply pipe of the water supply pipe movable, by performing an efficient water, turbidity component and a water tank in suspension in water It is possible to efficiently filter and remove both contaminants accumulated inside.
[0011]
Such a filtration method and filtration equipment of the present invention are particularly suitable for the treatment of a cooling water system.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a filtration method and filtration equipment for water containing a sedimentary suspension according to the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 is a system diagram showing a circulating cooling water system provided with a filtration facility for sedimentary suspension-containing water according to an embodiment of the present invention.
[0014]
In the cooling tower 1, the cooling water sprayed from the sprinkling pipe 1a is cooled in contact with the air introduced from the louver 1c while flowing down the filler layer 1b, and stored as cooling water in the lower water tank (pit) 1d. Is done. The air containing the steam is exhausted into the atmosphere by the fan 1e.
[0015]
Cooling water in the water tank 1d is withdrawn by the pump P 1 from the bottom of the tank 1d, it is fed from the cooling water supply pipe 11 to the heat exchanger 2. The water heated by exchanging heat in the heat exchanger 2 is returned to the cooling tower 1 through the return pipe 12, cooled, and circulated. A strainer 1 f is provided at the outlet of the cooling water at the bottom of the water tank 1 d so that sediments such as sludge in the water tank 1 d do not flow into the circulation pipe 11. Reference numeral 13 denotes a supply water introduction pipe for the cooling water system.
[0016]
In this embodiment, the cooling tower 1 of the tank 1d, the water supply pipe 14A, 14B, by 14 and pump P 2 withdrawn cooling water, after removing the suspended component by filtration through a filtration device (side filter) 3, The filtered water is returned from the pipe 15 to the water tank 1d. Although there is no restriction | limiting in particular as this filtration apparatus 3, For example, what provided the filtration layer filled with granular filter media, such as sand and anthracite, is used, Even if what filters by an upward flow, it filters by a downward flow You may do it. In this filtration device 3, since the filtration layer is clogged by continuing the filtration, the filter medium is backwashed, and the backwash waste water is discharged from the pipe 16 to the outside of the system also as a blow of circulating cooling water.
[0017]
The front end side of the water supply pipe 14 of the filtration device 3 is a fixed water supply pipe (hereinafter sometimes referred to as “fixed suction section”) 14A and a movable water supply pipe (hereinafter referred to as “movable suction section”). And the fixed suction portion 14A is fixed to an arbitrary portion of the water tank 1d. On the other hand, the movable suction part 14B is provided with an opening / closing valve V, and the tip side thereof is constituted by a flexible hose (for example, a blade hose).
[0018]
In the cooling water system shown in FIG. 1, for example, a fixed amount of cooling water is always supplied from the fixed suction portion 14A to the filtration device 3 and filtered, and the movable suction portion is irregularly or periodically as required. Cooling water is supplied to the filtering device 3 from 14B and filtered. When water is also taken from the movable suction portion 14B, the valve V is opened, and the movable suction portion 14B is moved to a portion where there is a lot of deposits such as sludge in the bottom of the water tank 1d. By inserting the tip water supply port of the movable suction portion 14B, the deposit at the bottom of the water tank 1d is supplied to the filtration device 3 together with the cooling water. In this way, by moving the movable suction part 14B and feeding the bottom sediment of the water tank 1d to the filtration device 3, the sediment that cannot be removed by water supply only by the fixed suction part 14A is efficiently filtered. It becomes possible to filter out by the apparatus 3 and to discharge out of the system.
[0019]
Water intake by the movable suction unit 14B varies depending on the operating condition of the cooling water system, the concentration ratio, and the like, but a sufficient effect can be obtained if it is performed once every 7-14 days for about 1-2 hours. However, water may be taken in by the constantly movable suction part 14B .
[0020]
Na us, 1, Ru der shows an embodiment in which the present invention is applied to a filtration treatment of the cooling water. Moreover, there is no restriction | limiting in particular also as a filtration apparatus, A membrane separator, a centrifugal filter (cyclone filter), etc. can be used other than what provided the above-mentioned filter-medium packed bed.
[0021]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
[0022]
Example 1
As shown in FIG. 1, a filtration device (filtered water amount 5 m 3 / h) was installed in a cooling tower having a retained water amount of 3 m 3 and a circulating water amount of 100 m 3 / h, and a fixed suction unit and a movable suction unit were provided. Water supply from the fixed suction unit was continuously performed, and water supply from the movable suction unit was 1 m 3 / h once a week for one hour. The movable suction section was visually moved to a place where sludge accumulation was remarkable and water was appropriately supplied. The amount of water supplied from the fixed suction unit was 5 m 3 / h, but was 4 m 3 / h when water was supplied from the movable suction unit.
[0023]
The cooling water system was operated for 2 months, and the dry weight of sludge accumulated in the water system after 2 months was filtered through a bobbin filter and the increase in the dry weight of the filtered filter was measured. No decrease in the flow rate of the circulating water pump was observed.
[0024]
Comparative Example 1
In Example 1, the cooling water system was operated for 2 months in the same manner except that the filtration by the filtration device was not performed. The dry weight of the sludge accumulated in the aqueous system after 2 months was 25 kg, and the sludge was circulating water. The pump strainer was blocked and the circulating water flow rate was reduced by 20%.
[0025]
Comparative Example 2
In Example 1, the cooling water system was operated for 2 months in the same manner except that the water supply to the filtration device was performed only by the fixed suction unit. The dry weight of the sludge accumulated in the aqueous system after 2 months was 20 kg. Yes, the sludge blocked the circulating water pump strainer, and the circulating water flow rate was reduced by 15%.
[0026]
【The invention's effect】
As described above in detail, according to the filtration method and the filtration equipment for sedimentary suspension-containing water of the present invention, not only turbidity components suspended in water but also suspended substances deposited in the system are removed. Can also be supplied to the filtration device and efficiently discharged out of the system.
[0027]
Such a filtration method and a filtration facility of the present invention are particularly suitable for cooling water system water treatment, and the movable suspension portion and the stationary suction portion are used to remove the sediment-containing suspension-containing water in the water tank of the cooling tower. In order to efficiently remove not only suspended components in the water but also slime, sludge and other contaminants accumulated in the system, It is possible to prevent a decrease in thermal efficiency and continue stable operation over a long period of time.
[Brief description of the drawings]
FIG. 1 is a system diagram showing a circulating cooling water system provided with a filtration facility for sedimentary suspension-containing water according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cooling tower 2 Heat exchanger 3 Filtration apparatus 14A Fixed feed water piping (fixed suction part)
14B Movable water supply piping (movable suction section)

Claims (2)

沈降性懸濁物を含む水を水槽に導入し、該水槽内の水を給水配管を介して濾過装置に供給して濾過する方法において、
該給水配管として該水槽内を移動可能な可動式の給水配管を設け、該可動式の給水配管により、該水槽内の水及び堆積物を該濾過装置に供給する沈降性懸濁物含有水の濾過方法であって、
該給水配管として、更に、固定設置された固定式の給水配管が設けられており、該水槽内の水を該固定式の給水配管と該可動式の給水配管とで該濾過装置に供給する沈降性懸濁物含有水の濾過方法であり、
該濾過装置の給水配管の先端側が、前記固定式の給水配管と可動式の給水配管とに分岐しており、
該水槽は、循環冷却水系の冷却塔の下部水槽であり、該濾過装置の濾材の逆洗を行い、循環冷却水のブローを兼ねて逆洗排水を系外へ排出することを特徴とする沈降性懸濁物含有水の濾過方法。In a method of introducing water containing sedimentary suspension into a water tank and supplying the water in the water tank to a filtration device through a water supply pipe and filtering the water,
A movable water supply pipe that is movable in the water tank is provided as the water supply pipe, and the sediment-containing suspension-containing water that supplies water and sediment in the water tank to the filtration device by the movable water supply pipe. A filtration method comprising:
As the water supply pipe, there is further provided a fixed water supply pipe that is fixedly installed, and the water in the water tank is settled to supply the filtration device through the fixed water supply pipe and the movable water supply pipe. A method for filtering water containing an aqueous suspension,
The front end side of the water supply pipe of the filtration device is branched into the fixed water supply pipe and the movable water supply pipe,
The water tank is a lower water tank of a cooling tower of a circulating cooling water system, performs backwashing of the filter medium of the filtration device, and discharges backwashing wastewater out of the system also as blowing of the circulating cooling water. For filtration of water containing aqueous suspension. 沈降性懸濁物を含む水が導入される水槽と、該水槽内の水が給水配管を介して供給される濾過装置とを備える設備において、
該給水配管として該水槽内を移動可能な可動式の給水配管を設け、該可動式の給水配管により、該水槽内の水及び堆積物を該濾過装置に供給可能とした沈降性懸濁物含有水の濾過設備であって、
該給水配管として、更に、固定設置された固定式の給水配管が設けられており、該水槽内の水を該固定式の給水配管と該可動式の給水配管とで該濾過装置に供給可能とした沈降性懸濁物含有水の濾過設備であり、
該濾過装置の給水配管の先端側が、前記固定式の給水配管と可動式の給水配管とに分岐しており、
該水槽は、循環冷却水系の冷却塔の下部水槽であり、該濾過装置は、循環冷却水のブロー配管を兼ねる濾材の逆洗排水の排出配管を有することを特徴とする沈降性懸濁物含有水の濾過設備。In a facility comprising a water tank into which water containing sedimentary suspension is introduced, and a filtration device to which water in the water tank is supplied through a water supply pipe,
A movable water supply pipe that can move in the water tank is provided as the water supply pipe, and the movable water supply pipe contains a sedimentary suspension that can supply water and sediment in the water tank to the filtration device. Water filtration equipment,
As the water supply pipe, there is further provided a fixed water supply pipe that is fixedly installed, and water in the water tank can be supplied to the filtration device by the fixed water supply pipe and the movable water supply pipe. Is a filtration facility for water containing sedimentary suspension,
The front end side of the water supply pipe of the filtration device is branched into the fixed water supply pipe and the movable water supply pipe,
The water tank is a lower water tank of a cooling tower of a circulating cooling water system, and the filtration device has a sedimentary suspension-containing suspension characterized by having a discharge pipe for backwash drainage of filter media that also serves as a blowing pipe for circulating cooling water Water filtration equipment.
JP2002356945A 2002-12-09 2002-12-09 Filtration method and equipment for water containing sedimentary suspension Expired - Fee Related JP4122957B2 (en)

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