JP5512115B2 - Water treatment system - Google Patents

Water treatment system Download PDF

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JP5512115B2
JP5512115B2 JP2008289306A JP2008289306A JP5512115B2 JP 5512115 B2 JP5512115 B2 JP 5512115B2 JP 2008289306 A JP2008289306 A JP 2008289306A JP 2008289306 A JP2008289306 A JP 2008289306A JP 5512115 B2 JP5512115 B2 JP 5512115B2
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filtration device
water
treatment system
water treatment
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JP2010115576A (en
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聖史 鎌田
匡紀 岩永
孝平 毛利
彰浩 北村
実 野村
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Suido Kiko Kaisha Ltd
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Description

本発明は、開放型ろ過装置が設置されている前段ろ過装置と、密閉型ろ過装置が設置されている後段ろ過装置とを備える水処理システムに関する。   The present invention relates to a water treatment system including a front-stage filtration apparatus in which an open-type filtration apparatus is installed, and a rear-stage filtration apparatus in which a sealed filtration apparatus is installed.

従来、前段ろ過装置と後段ろ過装置とを備える水処理システムにおいて、下記特許文献に示すように、前段ろ過装置と後段ろ過装置との両段共に密閉型ろ過装置で接続する場合、同じ密閉型ろ過装置であるので中間水槽が設置されていなかった（文献図１参照）。   Conventionally, in a water treatment system equipped with a front-stage filtration device and a rear-stage filtration device, as shown in the following patent document, when both the front-stage filtration device and the rear-stage filtration device are connected with a closed-type filtration device, the same hermetic filtration Since it is an apparatus, the intermediate water tank was not installed (refer literature 1 reference).

これに対し、図５に示す水処理システム１００のように、前段ろ過装置１０１が開放型ろ過装置１０２で、後段ろ過装置１０３が密閉型ろ過装置１０４であるとき、この両段のろ過装置は中間水槽１０５を用いて接続される。中間水槽１０５を用いて接続するのは、前段ろ過装置１０１が開放型ろ過装置１０２であるためろ過される処理水の流量が変動するのに対し、後段ろ過装置１０３の運転・制御を安定化させる緩衝機能を持たせるためであり、後段ろ過装置１０３の運転状況に前段ろ過装置１０１が影響を与えないように切り離するためである。また、中間水槽１０５は、前段ろ過装置１０１でろ過された処理水（以下「前段処理水」と言う。）を貯留する、後段ろ過装置１０３の原水貯留槽としての機能を有し、運転制御にも関わっていた。   On the other hand, when the front-stage filtration apparatus 101 is the open-type filtration apparatus 102 and the rear-stage filtration apparatus 103 is the closed-type filtration apparatus 104, as in the water treatment system 100 shown in FIG. The water tank 105 is used for connection. The connection using the intermediate water tank 105 is to stabilize the operation / control of the subsequent filtration device 103 while the flow rate of the treated water to be filtered fluctuates because the upstream filtration device 101 is the open filtration device 102. This is to provide a buffering function, so that the former filtration device 101 does not affect the operation status of the latter filtration device 103. Further, the intermediate water tank 105 has a function as a raw water storage tank of the post-stage filtration apparatus 103 that stores the treated water filtered by the pre-stage filtration apparatus 101 (hereinafter referred to as “pre-stage treated water”), and is used for operation control. Was also involved.

更に、開放型ろ過装置１０２と密閉型ろ過装置１０４を接続する場合、中間水槽１０５と後段ろ過装置１０３である密閉型ろ過装置１０４との間には、ポンプ１０６が設置される。ポンプ１０６が設置されるのは、前段ろ過装置１０１である開放型ろ過装置１０２の一次側水頭は、ほぼ装置高さかそれ以下であるのに対し、密閉型ろ過装置１０４は装置よりも相当高い一次側水頭を必要とするため、直接接続したのでは密閉型ろ過装置１０４に対する水頭が得られないためである。   Further, when the open type filtration device 102 and the closed type filtration device 104 are connected, a pump 106 is installed between the intermediate water tank 105 and the closed type filtration device 104 which is the latter-stage filtration device 103. The pump 106 is installed because the primary head of the open filtration device 102, which is the pre-stage filtration device 101, is approximately the height of the device or less, whereas the closed filtration device 104 is a primary that is considerably higher than the device. This is because a water head for the hermetic filter 104 cannot be obtained if a direct connection is made because a side head is required.

しかしながら、前段ろ過装置１０１が開放型ろ過装置１０２で、後段ろ過装置１０３が密閉型ろ過装置１０４であるとき、この両段のろ過装置を中間水槽１０５を用いて接続すると、（１）中間水槽１０５の容量は、前段処理水の流出量と後段ろ過装置１０３への流入量とのバランスから決定されるが、処理規模によっては巨大な水槽が必要となり、スペース、コストの両面で制約が大きかった。更に中間水槽を設置するとメンテナンス等の維持費が掛るとの問題点があった。また、（２）前段ろ過装置１０１は開放型で自由水面を持つため、中間水槽１０５の水位は、前段ろ過装置１０１の水位より低くする必要がある。そのため、後段ろ過装置１０３は、前段ろ過装置１０１と同レベル若しくはそれより低い位置に設置することが通常であり、設置条件に制約を受けていた。これは、後段ろ過装置１０３を前段ろ過装置１０１より高いレベルで設置すると、後段ろ過装置１０３の前に設置されるポンプ１０６の揚程を高くする必要があり、動力費増加の要因となるためである。更に、（３）前段ろ過装置１０１と後段ろ過装置１０３とを中間水槽１０５を介して接続する水処理システム１００は、制御系統が中間水槽１０５で分かれるために、水量バランスの調整や装置稼動条件の設定などを前段ろ過装置１０１と後段ろ過装置１０３とで別個に行う必要があり、制御方法が複雑であった。   However, when the front-stage filtration apparatus 101 is an open-type filtration apparatus 102 and the rear-stage filtration apparatus 103 is a closed-type filtration apparatus 104, when these two stages of filtration apparatuses are connected using the intermediate water tank 105, (1) the intermediate water tank 105 However, depending on the treatment scale, a huge water tank is required, and there are large restrictions on both space and cost. Furthermore, there is a problem that maintenance costs such as maintenance are required if an intermediate water tank is installed. (2) Since the pre-stage filtration apparatus 101 is an open type and has a free water surface, the water level of the intermediate water tank 105 needs to be lower than the water level of the pre-stage filtration apparatus 101. For this reason, the latter-stage filtration device 103 is usually installed at the same level as or lower than that of the first-stage filtration device 101, and the installation conditions are restricted. This is because if the rear-stage filtration device 103 is installed at a higher level than the front-stage filtration device 101, it is necessary to increase the head of the pump 106 installed in front of the rear-stage filtration device 103, which causes an increase in power cost. . Furthermore, (3) the water treatment system 100 in which the pre-stage filtration apparatus 101 and the post-stage filtration apparatus 103 are connected via the intermediate water tank 105, because the control system is divided by the intermediate water tank 105, Setting and the like need to be performed separately for the pre-stage filtration apparatus 101 and the post-stage filtration apparatus 103, and the control method is complicated.

特開２００５−９５８１２JP 2005-95812 A

本発明はかかる問題点を解決するためになされたものであって、その目的とするところは、開放型ろ過装置が設置されている前段ろ過装置と、密閉型ろ過装置が設置されている後段ろ過装置とを備える水処理システムにおいて、中間水槽を設置しない水処理システムを提供すること、即ち、スペースやコストを大幅に削減し、設置条件の制約を解消し、運転制御系統を統一することができる水処理システムを提供することである。   The present invention has been made to solve such a problem, and the object of the present invention is to provide a pre-stage filtration apparatus in which an open-type filtration apparatus is installed and a post-stage filtration in which a closed-type filtration apparatus is installed. In a water treatment system provided with a device, it is possible to provide a water treatment system that does not have an intermediate water tank, that is, to greatly reduce space and costs, eliminate restrictions on installation conditions, and unify operation control systems. It is to provide a water treatment system.

上記目的を達成するため、本発明の請求項１に係る水処理システムは、開放型ろ過装置が少なくとも１台以上設置されている前段ろ過装置と、密閉型ろ過装置が少なくとも１台以上設置されている後段ろ過装置とを備える水処理システムにおいて、前記前段ろ過装置と前記後段ろ過装置とはポンプを介して直接接続され、前記前段ろ過装置でろ過された処理水（以下「前段処理水」という。）の流量は、前記ポンプの回転数または前記ポンプの２次側に取り付けたバルブの開度によって制御されて前記後段ろ過装置へ圧送され、前記ポンプで前記後段ろ過装置に圧送される前記前段処理水の流入量は、前記後段ろ過装置の２次側の流出口に接続されている配管に設置されている流量計で計測される前記後段ろ過装置でろ過された処理水（以下「後段処理水」と言う。）の流出量で制御され、前記前段ろ過装置への原水の流入量は、前記前段ろ過装置の水位、又は前記後段処理水の流出量を基準に所定量が勘案された数値で、制御され、前記前段ろ過装置と前記後段ろ過装置の運転制御系統が統一されていることを特徴とするものである。 In order to achieve the above object, a water treatment system according to claim 1 of the present invention includes a pre-stage filtration apparatus in which at least one open type filtration apparatus is installed and at least one sealed type filtration apparatus. In the water treatment system including the downstream filtration device, the upstream filtration device and the downstream filtration device are directly connected via a pump, and treated water filtered by the upstream filtration device (hereinafter referred to as “pretreatment water”). ) Is controlled by the number of rotations of the pump or the opening of a valve attached to the secondary side of the pump , and is pumped to the subsequent filtration device, and is fed to the subsequent filtration device by the pump. The amount of inflow of water is treated water (hereinafter referred to as filtered water) filtered by the latter-stage filtration device measured by a flow meter installed in a pipe connected to the outlet on the secondary side of the latter-stage filtration device. The amount of raw water flowing into the front-stage filtration device takes into account a predetermined amount based on the water level of the front-stage filtration device or the outflow amount of the rear-stage treated water. in numeric value is controlled, the operation control system of the preceding filtering device and the subsequent filtration apparatus is one which characterized that you have been unified.

また、本発明の請求項２に係る水処理システムは、請求項１に記載の水処理システムにおいて、前記前段ろ過装置の２次側の出口に設置されている圧力計の圧力又は前記前段ろ過装置の水位が設定値から外れた場合に、前記ポンプの運転が停止されると共に前記前段ろ過装置及び前記後段ろ過装置の運転が停止される制御を行うことを特徴とするものである。 A water treatment system according to claim 2 of the present invention is the water treatment system according to claim 1, wherein the pressure of a pressure gauge installed at the outlet on the secondary side of the front-stage filtration device or the front-stage filtration device. If the water level is out of the set value, the operation of the operation of the pump is stopped Rutotomoni the preceding filtering device and the subsequent filtration apparatus is characterized in performing control to be stopped.

また、本発明の請求項３に係る水処理システムは、請求項１または請求項２に記載の水処理システムにおいて、前記前段ろ過装置への原水の流入量が、前記ポンプで前記後段ろ過装置へ圧送される前記前段処理水の流入量より多くなることにより発生する前記前段処理水のオーバーフローを前記前段ろ過装置の流入口より前に戻すことを特徴とするものである。 The water treatment system according to claim 3 of the present invention is the water treatment system according to claim 1 or claim 2, wherein an inflow amount of raw water to the pre-stage filtration device is transferred to the post- stage filtration device by the pump. is characterized in that the return overflow of the preprocessing water produced by larger than the inflow amount of the pre-processing water to be pumped before the inlet of the pre-stage filtration system.

また、本発明の請求項４に係る水処理システムは、請求項１乃至３のいずれか１項に記載の水処理システムにおいて、前記前段ろ過装置が上向流砂ろ過装置、下向流砂ろ過装置、または横流式砂ろ過装置の中のいずれかであることを特徴とするものである。 Moreover, the water treatment system which concerns on Claim 4 of this invention is the water treatment system of any one of Claims 1 thru | or 3. WHEREIN: The said upstream filtration apparatus is an upward sand filter, a downward sand filter, Or it is either in a cross-flow type sand filtration apparatus, It is characterized by the above-mentioned.

また、本発明の請求項５に係る水処理システムは、請求項１乃至４のいずれか１項に記載の水処理システムにおいて、前記後段ろ過装置が膜ろ過装置、急速砂ろ過装置、または活性炭ろ過装置の中のいずれかであることを特徴とするものである。 The water treatment system according to claim 5 of the present invention, in the water treatment system according to any one of claims 1 to 4, wherein the subsequent filtration apparatus is a membrane filtration apparatus, rapid sand filtration apparatus, or activated carbon filtration It is one of the devices.

上記構成を備えた本発明の水処理システムは、前段ろ過装置と後段ろ過装置とが中間水槽を設置することなく直接接続されているので、中間水槽を設置するためのスペースやコストを大幅に削減することができ、設置条件の制約を解消することができる。更に、前段ろ過装置と後段ろ過装置とがポンプを介して直接接続されているので運転制御系統を統一することができる。   In the water treatment system of the present invention having the above-described configuration, the pre-stage filtration apparatus and the post-stage filtration apparatus are directly connected without installing an intermediate water tank, so that the space and cost for installing the intermediate water tank are greatly reduced. It is possible to eliminate restrictions on installation conditions. Furthermore, since the pre-stage filtration device and the post-stage filtration device are directly connected via a pump, the operation control system can be unified.

更に、本発明に係る水処理システムは、前段ろ過装置の２次側の圧力または水位のいずれか一の値が設定値から外れた場合にポンプの運転が停止される制御であるので、緩衝機能としての中間水槽が設置されていない場合でも前段処理水がポンプにより過剰に吸引されるのを防止し、ポンプや後段ろ過装置等が棄損するのを防止することができる。 Furthermore, since the water treatment system according to the present invention is a control in which the operation of the pump is stopped when any one of the pressure on the secondary side or the water level of the pre-stage filtration device deviates from the set value, the buffer function Even when the intermediate water tank is not installed, it is possible to prevent the pre-stage treated water from being excessively sucked by the pump, and to prevent the pump and the post-stage filtration device from being lost.

更に、本発明に係る水処理システムは、前段ろ過装置と後段ろ過装置の処理能力に一時的な差異が生じることにより発生する原水若しくは前段処理水のオーバーフローを前段ろ過装置の流入口より前に戻す流路を設けたので、原水若しくは前段処理水が流出する無駄を防止することができる。 Furthermore, the water treatment system according to the present invention returns the overflow of the raw water or the pre-stage treated water generated by a temporary difference in the treatment capacity of the pre-stage filtration apparatus and the post-stage filtration apparatus to the front of the inlet of the pre-stage filtration apparatus. Since the flow path is provided, it is possible to prevent waste of the raw water or the pre-treatment water flowing out.

更に、本発明に係る水処理システムは、前記ポンプで前記後段ろ過装置に圧送される前段処理水の流入量は、前記後段ろ過装置の２次側の流出口に接続されている配管に設置されている流量計で計測される後段処理水の流出量に対応して、又は前記ポンプと前記後段ろ過装置とが接続されている配管に設置されている流量計で計測される前記前段処理水の流入量で、制御され、前段ろ過装置への流入量は、前段ろ過装置の水位で制御されるので、後段ろ過装置で必要な前段処理水量を不足なく供給することができ、水処理システムを後段ろ過装置の処理能力に適合させて効率よく稼働させることができる。 Furthermore, in the water treatment system according to the present invention , the inflow amount of the pre-stage treated water pumped to the post-stage filtration apparatus by the pump is installed in a pipe connected to the secondary outlet of the post-stage filtration apparatus. Corresponding to the outflow amount of the post-stage treated water measured by the flow meter being installed, or the pre-stage treated water measured by the flow meter installed in the pipe connected to the pump and the post-stage filtration device Since the amount of inflow to the pre-stage filtration device is controlled by the water level of the pre-stage filtration device, the amount of pre-treatment water required by the post-stage filtration device can be supplied without a shortage, and the water treatment system can be It can be operated efficiently by adapting to the processing capacity of the filtration device.

更に、本発明に係る水処理システムは、後段ろ過装置へポンプで圧送される前段処理水の流入量は、前段ろ過装置の水位で制御されるので、後段ろ過装置は、前段ろ過装置の処理能力に対応してろ過処理を行うことができる。 Furthermore, in the water treatment system according to the present invention , since the inflow amount of the pre-stage treated water pumped to the post-stage filtration apparatus is controlled by the water level of the pre-stage filtration apparatus, the post-stage filtration apparatus has the processing capacity of the pre-stage filtration apparatus. The filtration process can be performed corresponding to the above.

更に、本発明に係る水処理システムは、前記ポンプで前記後段ろ過装置に圧送される前段処理水の流入量は、前記後段ろ過装置の２次側の流出口に接続されている配管に設置されている流量計で計測される後段処理水の流出量に対応して、又は前記ポンプと前記後段ろ過装置とが接続されている配管に設置されている流量計で計測される前記前段処理水の流入量で、制御され、前記前段ろ過装置への流入量は、後段処理水の流出量を基準に所定量が勘案された数値で制御されるので、前段ろ過装置と後段ろ過装置とのろ過処理能力の差異が考慮され、バッファーとしての中間水槽がないことによる前段処理水が不足し、水処理システムが停止するのを防止することができる。 Furthermore, in the water treatment system according to the present invention , the inflow amount of the pre-stage treated water pumped to the post-stage filtration apparatus by the pump is installed in a pipe connected to the secondary outlet of the post-stage filtration apparatus. Corresponding to the outflow amount of the post-stage treated water measured by the flow meter being installed, or the pre-stage treated water measured by the flow meter installed in the pipe connected to the pump and the post-stage filtration device Controlled by the amount of inflow, the amount of inflow to the pre-stage filtration device is controlled by a numerical value that takes into account the predetermined amount based on the amount of outflow of post-stage treated water, so that the pre-filtration device and the post-stage filtration device are filtered. Considering the difference in capacity, it is possible to prevent the water treatment system from being stopped due to lack of pre-stage treated water due to the absence of an intermediate water tank as a buffer.

更に、本発明に係る水処理システムは、前記ポンプで前記後段ろ過装置に圧送される前段処理水の流入量は、前記後段ろ過装置の２次側の流出口に接続されている配管に設置されている流量計で計測される後段処理水の流出量に対応して、又は前記ポンプと前記後段ろ過装置とが接続されている配管に設置されている流量計で計測される前記前段処理水の流入量で、制御され、前記前段ろ過装置への流入量は、前記後段処理水の流出量及び前記オーバーフロー量を基準に所定量が勘案された数値で制御されるので、前段ろ過装置と後段ろ過装置とのろ過処理能力の差異が考慮され、バッファーとしての中間水槽がないことによる前段処理水が不足し、水処理システムが停止するのを防止することができる。 Furthermore, in the water treatment system according to the present invention , the inflow amount of the pre-stage treated water pumped to the post-stage filtration apparatus by the pump is installed in a pipe connected to the secondary outlet of the post-stage filtration apparatus. Corresponding to the outflow amount of the post-stage treated water measured by the flow meter being installed, or the pre-stage treated water measured by the flow meter installed in the pipe connected to the pump and the post-stage filtration device The amount of inflow to the pre-stage filtration device is controlled by a numerical value that takes into account a predetermined amount based on the amount of outflow of the post-stage treated water and the overflow amount, so that the pre-stage filtration device and the post-stage filtration device are controlled. It is possible to prevent the water treatment system from being stopped due to a shortage of pre-stage treated water due to the absence of the intermediate water tank as a buffer in consideration of the difference in filtration treatment capacity with the apparatus.

更に、本発明に係る水処理システムにおいては、前段ろ過装置に上向流砂ろ過装置、下向流砂ろ過装置、または横流式砂ろ過装置の中のいずれかを、後段ろ過装置に膜ろ過装置、急速砂ろ過装置、または活性炭ろ過装置のいずれかを用いるのが好適である。   Furthermore, in the water treatment system according to the present invention, any one of the upward sand filter, the downward sand filter, or the cross-flow sand filter is used as the pre-stage filter, and the membrane filter is used as the post-filter. It is preferable to use either a sand filter or an activated carbon filter.

以下に図面を参照して、この発明の好適な実施の形態を例示して説明する。ただし、この発明の範囲は、特に限定的記載がない限り、この実施の形態に記載されている内容に限定する趣旨のものではない。   Preferred embodiments of the present invention will be described below with reference to the drawings. However, the scope of the present invention is not intended to be limited to the contents described in this embodiment unless otherwise specified.

第１実施形態：
本発明の第１実施形態に係る水処理システムの概略図を図１に示す。この水処理システム１は、前段ろ過装置１０に開放型ろ過装置１１である横流式砂ろ過装置の一種である横流移動床式砂ろ過装置が設置され、後段ろ過装置２０には密閉型ろ過装置２１である膜ろ過装置が設置されている。 First embodiment:
A schematic diagram of a water treatment system according to the first embodiment of the present invention is shown in FIG. In this water treatment system 1, a cross-flow moving bed type sand filtration device, which is a kind of a cross-flow type sand filtration device that is an open-type filtration device 11, is installed in a front-stage filtration device 10. A membrane filtration device is installed.

開放型ろ過装置１１と密閉型ろ過装置２１とは後段ポンプ４０を介して配管５０で直接接続され、開放型ろ過装置１１に原水及び後述するオーバーフローを流入させるために流入口１２に接続されている配管５１には前段ポンプ３０が中間に設置されている。また、開放型ろ過装置１１には、ろ過された前段処理水の出口である２次側の出口に圧力計１３が設置されていると共に、前段ろ過装置の水位を計測する水位計１４が設置されている。密閉型ろ過装置２１の２次側出口に接続されている配管５３の中間には流量計２２が設置されている。   The open-type filtration device 11 and the hermetic-type filtration device 21 are directly connected by a pipe 50 via a post-stage pump 40, and are connected to the inlet 12 for allowing raw water and an overflow described later to flow into the open-type filtration device 11. The upstream pump 30 is installed in the middle of the pipe 51. In addition, the open-type filtration device 11 is provided with a pressure gauge 13 at the outlet on the secondary side, which is an outlet of the filtered pre-stage treated water, and a water level gauge 14 for measuring the water level of the pre-stage filtration apparatus. ing. A flow meter 22 is installed in the middle of the pipe 53 connected to the secondary side outlet of the hermetic filter 21.

次に、この水処理システム１でのろ過処理の流れについて説明する。図示しない原水貯留槽から配管５１に流出した原水は、前段ポンプ３０により圧送され流入口１２より開放型ろ過装置１１の１次側に流入する。開放型ろ過装置１１でろ過処理された前段処理水は、圧力計１３が設置されている２次側の流出口から配管５０に流出し、配管５０の途中に設置されている後段ポンプ４０により圧送され密閉型ろ過装置２１の１次側に流入する。密閉型ろ過装置２１でろ過処理された後段処理水は、２次側の流出口から流量計２２が設置されている配管５３へ流出する。   Next, the flow of the filtration process in the water treatment system 1 will be described. The raw water that has flowed out from the raw water storage tank (not shown) into the pipe 51 is pumped by the upstream pump 30 and flows into the primary side of the open-type filtration device 11 through the inlet 12. The pre-stage treated water filtered by the open-type filtration device 11 flows out from the secondary side outlet where the pressure gauge 13 is installed to the pipe 50 and is pumped by the rear stage pump 40 installed in the middle of the pipe 50. And flows into the primary side of the hermetic filter 21. The post-stage treated water filtered by the hermetic filter 21 flows out from the secondary outlet to the pipe 53 where the flow meter 22 is installed.

この場合において、密閉型ろ過装置２１に後段ポンプ４０で圧送される前段処理水の流入量は、配管５３に設置されている流量計２２で計測される後段処理水の流出量に基き、後段ポンプ４０の回転数で流量が制御される。そのため、後段ポンプ４０により圧送される前段処理水の必要量は、開放型ろ過装置１１で常時ろ過処理されていることが必要となり、開放型ろ過装置１１へ前段ポンプ３０で圧送される原水の流入量は、開放型ろ過装置１１に設置されている水位計１４により計測された、前段ろ過装置の水位で制御される。従って、密閉型ろ過装置２１で必要な前段処理水量が不足なく供給され、水処理システム１を密閉型ろ過装置２１の処理能力に適合させて運転することが可能となる。尚、流量の制御は、後段ポンプ４０の回転数ではなく、後段ポンプ４０と密閉型ろ過装置２１とを連結している配管５０Ａに設置されている図示されていないバルブの開度で制御しても良い。更に、開放型ろ過装置１１として設置している横流移動床式ろ過機の水位を一定に制御する目的は、このろ過装置の上部に設置されているろ過砂洗浄器の水位は固定であり、ろ過装置の水位はこの水位より一定以上高くしなければならないためであり、横流移動床式ろ過機に代えて図示しない固定床下向流ろ過機を使用した場合は、装置水位がろ過砂より下位になると、ろ過性能が著しく悪化するのでこれを防止するためである。   In this case, the inflow amount of the pre-stage treated water pumped to the hermetic filter 21 by the post-stage pump 40 is based on the outflow amount of the post-stage treat water measured by the flow meter 22 installed in the pipe 53. The flow rate is controlled at a rotational speed of 40. Therefore, the required amount of the pre-stage treated water pumped by the post-stage pump 40 needs to be constantly filtered by the open-type filter 11, and the inflow of raw water pumped by the pre-stage pump 30 to the open-type filter 11. The amount is controlled by the water level of the pre-stage filtration device measured by the water level meter 14 installed in the open type filtration device 11. Therefore, the amount of pre-treatment water required by the sealed filtration device 21 is supplied without shortage, and the water treatment system 1 can be operated in accordance with the treatment capacity of the sealed filtration device 21. The flow rate is controlled not by the rotational speed of the rear pump 40 but by the opening of a valve (not shown) installed in the pipe 50A connecting the rear pump 40 and the hermetic filter 21. Also good. Furthermore, the purpose of controlling the water level of the cross-flow moving bed type filter installed as the open-type filter device 11 to a constant level is that the water level of the filter sand washer installed at the top of the filter device is fixed. This is because the water level of the device must be higher than a certain level above this water level.If a fixed bed downflow filter (not shown) is used instead of the cross-flow moving bed type filter, the device water level is lower than the filter sand. This is because the filtration performance is remarkably deteriorated.

尚、配管５３に設置されている流量計２２を、後段ポンプ４０と密閉型ろ過装置２１の流入口とを連結する配管５０Ａの中間に設置し、密閉型ろ過装置２１に後段ポンプ４０で圧送される前段処理水の流入量を、この位置に設置された流量計で計測された流入量で制御しても良い。   In addition, the flow meter 22 installed in the pipe 53 is installed in the middle of the pipe 50A connecting the rear stage pump 40 and the inlet of the hermetic filter 21 and is pumped to the hermetic filter 21 by the rear pump 40. The inflow amount of the pre-stage treated water may be controlled by the inflow amount measured by the flow meter installed at this position.

また、密閉型ろ過装置２１に後段ポンプ４０で圧送される前段処理水の流入量が著しく増加し、前段ろ過装置の２次側の水位が急激に低下し、開放型ろ過装置１１に設置されている圧力計１３または水位計１４により計測されたいずれかの値が設定値より外れた場合、後段ポンプ４０の運転が停止され、後段ポンプ４０に過大な負荷が掛かることによる後段ポンプ４０及び密閉型ろ過装置２１の故障を防止することが可能となる。   Moreover, the inflow amount of the pre-treatment water pumped by the post-stage pump 40 to the hermetic filter 21 is remarkably increased, the water level on the secondary side of the pre-stage filter is drastically lowered, and the open-type filter 11 is installed. When any value measured by the pressure gauge 13 or the water level gauge 14 deviates from the set value, the operation of the rear pump 40 is stopped and an excessive load is applied to the rear pump 40 and the sealed type. It becomes possible to prevent the failure of the filtration device 21.

第２実施形態：
本発明の第２実施形態に係る水処理システムは、図２に示す通りであり、第１実施形態と以下の構成が異なる以外は同じである。即ち、前段ポンプ３０と開放型ろ過装置１１の流入口１２とを連結する配管５１Ａの中間に前段流量計１５が設置されている。尚、第１実施形態において、密閉型ろ過装置２１の流出口に接続される配管５３に設置されていた流量計２２は、設置されていない。 Second embodiment:
The water treatment system according to the second embodiment of the present invention is as shown in FIG. 2 and is the same as the first embodiment except for the following configuration. That is, the front-stage flow meter 15 is installed in the middle of the pipe 51 </ b> A that connects the front-stage pump 30 and the inlet 12 of the open filter 11. In addition, in 1st Embodiment, the flowmeter 22 installed in the piping 53 connected to the outflow port of the closed filter 21 is not installed.

第２実施形態において、密閉型ろ過装置２１に後段ポンプ４０で圧送される前段処理水の流入量は、開放型ろ過装置１１に設置されている水位計１４により計測された、前段ろ過装置の水位を一定状態に保つように、後段ポンプ４０の回転数で流量が制御される。従って、密閉型ろ過装置２１は、開放型ろ過装置１１でろ過処理された前段処理水量に適合して運転するので、水処理システム１を開放型ろ過装置１１の処理能力に適合させて運転することが可能となる。尚、開放型ろ過処理装置１１でのろ過処理量は、水位計１４により計測された、前段ろ過装置の水位に基き、流入口１２に接続されている配管５１Ａに設置されている前段流量計１５で計測される原水の流入量で制御することが可能である。   In the second embodiment, the inflow amount of the first-stage treated water pumped to the hermetic filter 21 by the second-stage pump 40 is measured by the water level gauge 14 installed in the open-type filter 11 and the water level of the first-stage filter. The flow rate is controlled by the number of rotations of the rear-stage pump 40 so as to maintain a constant state. Therefore, since the closed filtration device 21 is operated in accordance with the amount of the pre-stage treated water filtered by the open filtration device 11, the water treatment system 1 is operated in accordance with the treatment capacity of the open filtration device 11. Is possible. Note that the amount of filtration processing in the open-type filtration treatment device 11 is based on the water level of the previous filtration device measured by the water level meter 14, and the upstream flow meter 15 installed in the pipe 51 </ b> A connected to the inlet 12. It is possible to control the flow rate of raw water measured in

第３実施形態：
本発明の第３実施形態に係る水処理システムは、図３に示す通りであり、第１実施形態と以下の構成が異なる以外は同じである。即ち、開放型ろ過装置１１の上方に接続されている配管５２が、図示しない原水槽と開放型ろ過装置１１とを接続している配管５１に連結されている。また、前段ポンプ３０と開放型ろ過装置１１の流入口１２とを連結する配管５１Ａの中間に前段流量計１５が設置されている。 Third embodiment:
The water treatment system according to the third embodiment of the present invention is as shown in FIG. 3 and is the same as the first embodiment except for the following configuration. That is, the pipe 52 connected above the open filter 11 is connected to a pipe 51 connecting the raw water tank (not shown) and the open filter 11. In addition, a front-stage flow meter 15 is installed in the middle of a pipe 51 </ b> A that connects the front-stage pump 30 and the inlet 12 of the open filter 11.

第３実施形態において、密閉型ろ過装置２１に後段ポンプ４０で圧送される前段処理水の流入量は配管５３に設置されている流量計２２で計測される後段処理水の流出量に基き、後段ポンプ４０の回転数で流量が制御される。そのため、後段ポンプ４０により圧送される前段処理水の必要量は、開放型ろ過装置１１で常時ろ過処理されることが必要となり、開放型ろ過装置１１への原水及びオーバーフローの流入量は、流量計２２で計測される後段処理水の流出量を基準に一定量を加算した値、若しくは一定量を乗じた値等を用いて、前段流量計１５で制御して行う。従って、開放型ろ過装置１１と密閉型ろ過装置２１とのろ過処理能力の差異が考慮されて開放型ろ過装置１１への流入量が制御されるので、前段処理水が不足し、水処理システム１が停止するのを防止することができる。   In the third embodiment, the inflow amount of the pre-stage treated water pumped to the hermetic filter 21 by the post-stage pump 40 is based on the outflow amount of the post-stage treat water measured by the flow meter 22 installed in the pipe 53. The flow rate is controlled by the rotation speed of the pump 40. Therefore, the required amount of the pre-stage treated water pumped by the post-stage pump 40 needs to be constantly filtered by the open-type filtration device 11, and the flow rate of raw water and overflow into the open-type filter device 11 is The flow rate is controlled by the front-stage flow meter 15 using a value obtained by adding a fixed amount based on the outflow amount of the post-stage treated water measured at 22 or a value obtained by multiplying the fixed amount. Accordingly, since the amount of inflow into the open-type filtration device 11 is controlled in consideration of the difference in filtration processing capacity between the open-type filtration device 11 and the closed-type filtration device 21, the pre-stage treated water is insufficient, and the water treatment system 1 Can be prevented from stopping.

尚、開放型ろ過装置１１への流入量が、後段ポンプ４０で密閉型ろ過装置２１へ圧送される前段処理水の流入量より多い場合には、前段処理水はオーバーフローとして開放型ろ過装置１１の上方より配管５２を経由して配管５１または図示しない原水槽まで戻され、原水と一緒になって開放型ろ過装置１１に再び流入するようになっているので、原水若しくは前段処理水の無駄を防止することが出来る。   In addition, when the inflow amount to the open-type filtration apparatus 11 is larger than the inflow amount of the pre-stage treated water pumped to the closed-type filter apparatus 21 by the post-stage pump 40, the pre-stage treated water is overflowed and the open-type filter apparatus 11 Since it is returned from above to the pipe 51 or the raw water tank (not shown) via the pipe 52 and flows back into the open filter 11 together with the raw water, the waste of the raw water or the pre-treatment water is prevented. I can do it.

尚、配管５２及び前段流量計１５が増設されている以外第１実施形態と同じ構成であるので、配管５３に設置されている流量計２２を、後段ポンプ４０と密閉型ろ過装置２１の流入口とを連結する配管５０Ａの中間に設置し、密閉型ろ過装置２１に後段ポンプ４０で圧送される前段処理水の流入量を、この位置に設置された流量計で計測された流入量で制御しても良いことは、言うまでもない。   In addition, since it is the same structure as 1st Embodiment except the piping 52 and the front | former stage flowmeter 15 being added, the flowmeter 22 installed in the pipe | tube 53 is connected to the inlet of the back | latter stage pump 40 and the airtight filter 21. Is installed in the middle of the pipe 50A, and the inflow amount of the pre-treatment water pumped by the post-stage pump 40 to the hermetic filter 21 is controlled by the inflow amount measured by the flow meter installed at this position. Needless to say, you can.

第４実施形態：
本発明の第４実施形態に係る水処理システムは、図４に示す通りであり、第３実施形態と以下の構成が異なる以外は同じである。即ち、オーバーフローとして流出させるために開放型ろ過装置１１の上方に接続されている配管５２にオーバーフロー流量計１６が設置されている。 Fourth embodiment:
The water treatment system according to the fourth embodiment of the present invention is as shown in FIG. 4 and is the same as the third embodiment except for the following configuration. That is, the overflow flow meter 16 is installed in the pipe 52 connected to the upper side of the open-type filtration device 11 so as to flow out as an overflow.

第４実施形態において、密閉型ろ過装置２１に後段ポンプ４０で圧送される前段処理水の流入量は配管５３に設置されている流量計２２で計測される後段処理水の流出量に基き、後段ポンプ４０の回転数で流量が制御される。従って、後段ポンプ４０により圧送される前段処理水の必要量は、開放型ろ過装置１１で常時ろ過処理されることが必要となり、開放型ろ過装置１１への原水及びオーバーフローの流入量は、流量計２２で計測される後段処理水の流出量と、オーバーフロー流量計１６で計測されるオーバーフローの流出量との和を基準に一定量を加算した値、若しくは一定量を乗じた値等を用いて、前段流量計１５で制御して行う。従って、開放型ろ過装置１１と密閉型ろ過装置２１とのろ過処理能力の差異が考慮されて開放型ろ過装置１１への流入量が制御されるので、前段処理水が不足し、水処理システム１が停止するのを防止することができる。   In the fourth embodiment, the inflow amount of the pre-stage treated water pumped to the hermetic filter 21 by the post-stage pump 40 is based on the outflow amount of the post-stage treat water measured by the flow meter 22 installed in the pipe 53. The flow rate is controlled by the rotation speed of the pump 40. Therefore, the necessary amount of the pre-stage treated water pumped by the post-stage pump 40 needs to be constantly filtered by the open-type filter device 11, and the inflow of raw water and overflow into the open-type filter device 11 is determined by a flow meter. Using a value obtained by adding a constant amount based on the sum of the outflow amount of the post-stage treated water measured at 22 and the overflow outflow amount measured by the overflow flow meter 16, or a value multiplied by the constant amount, This is controlled by the upstream flow meter 15. Accordingly, since the amount of inflow into the open-type filtration device 11 is controlled in consideration of the difference in filtration processing capacity between the open-type filtration device 11 and the closed-type filtration device 21, the pre-stage treated water is insufficient, and the water treatment system 1 Can be prevented from stopping.

尚、上記第１実施形態乃至第４実施形態において、密閉型ろ過装置２１に使用される装置として、膜ろ過装置の代わりに急速砂ろ過装置、または活性炭ろ過装置を用いても良い。   In addition, in the said 1st Embodiment thru | or 4th Embodiment, you may use a quick sand filtration apparatus or an activated carbon filtration apparatus instead of a membrane filtration apparatus as an apparatus used for the sealed filtration apparatus 21. FIG.

更に、上記第１実施形態乃至第４実施形態において、開放型ろ過装置１１に原水を圧送するのに前段ポンプ３０を用いたが、原水槽の水位を開放型ろ過装置１１の水位より高くし、高低差による圧力を用い原水等を開放型ろ過装置１１に流量制御弁にて制御して圧送しても良い。   Furthermore, in the said 1st Embodiment thru | or 4th Embodiment, although the front | former stage pump 30 was used for pumping raw | natural water to the open-type filtration apparatus 11, the water level of a raw | natural water tank is made higher than the water level of the open-type filtration apparatus 11, The raw water or the like may be sent to the open-type filtration device 11 by controlling it with a flow rate control valve using pressure due to the difference in height.

本発明の第１実施形態に係る水処理システムの概略説明図である。It is a schematic explanatory drawing of the water treatment system which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る水処理システムの概略説明図である。It is a schematic explanatory drawing of the water treatment system which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る水処理システムの概略説明図である。It is a schematic explanatory drawing of the water treatment system which concerns on 3rd Embodiment of this invention. 本発明の第４実施形態に係る水処理システムの概略説明図である。It is a schematic explanatory drawing of the water treatment system which concerns on 4th Embodiment of this invention. 従来例に係る水処理システムの概略説明図である。It is a schematic explanatory drawing of the water treatment system which concerns on a prior art example.

符号の説明Explanation of symbols

１ 水処理システム
１０ 前段ろ過装置
１１ 開放型ろ過装置
１２ 流入口
１３ 圧力計
１４ 水位計
１５ 前段流量計
１６ オーバーフロー流量計
２０ 後段ろ過装置
２１ 密閉型ろ過装置
２２ 流量計
３０ 前段ポンプ
４０ 後段ポンプ
５０，５１，５２，５３ 配管
DESCRIPTION OF SYMBOLS 1 Water treatment system 10 Pre-stage filtration apparatus 11 Open type filtration apparatus 12 Inlet 13 Pressure gauge 14 Water level gauge 15 Pre-stage flow meter 16 Overflow flow meter 20 Subsequent filtration apparatus 21 Sealed filtration apparatus 22 Flowmeter 30 Pre-stage pump 40 Subsequent pump 50, 51, 52, 53 Piping

Claims (5)

開放型ろ過装置が少なくとも１台以上設置されている前段ろ過装置と、密閉型ろ過装置が少なくとも１台以上設置されている後段ろ過装置とを備える水処理システムにおいて、
前記前段ろ過装置と前記後段ろ過装置とはポンプを介して直接接続され、
前記前段ろ過装置でろ過された処理水（以下「前段処理水」という。）の流量は、前記ポンプの回転数または前記ポンプの２次側に取り付けたバルブの開度によって制御されて前記後段ろ過装置へ圧送され、
前記ポンプで前記後段ろ過装置に圧送される前記前段処理水の流入量は、前記後段ろ過装置の２次側の流出口に接続されている配管に設置されている流量計で計測される前記後段ろ過装置でろ過された処理水（以下「後段処理水」と言う。）の流出量で制御され、
前記前段ろ過装置への原水の流入量は、前記前段ろ過装置の水位、又は前記後段処理水の流出量を基準に所定量が勘案された数値で、制御され、
前記前段ろ過装置と前記後段ろ過装置の運転制御系統が統一されていることを特徴とする水処理システム。 In a water treatment system comprising a front-stage filtration apparatus in which at least one open-type filtration apparatus is installed, and a rear-stage filtration apparatus in which at least one sealed filtration apparatus is installed,
The pre-stage filtration device and the post-stage filtration device are directly connected via a pump,
The flow rate of the treated water filtered by the front-stage filtration device (hereinafter referred to as “pre-stage treated water”) is controlled by the number of rotations of the pump or the opening of a valve attached to the secondary side of the pump , and the second-stage filtration. Pumped to the device ,
The inflow amount of the pre-stage treated water pumped to the post-stage filtration device by the pump is measured by a flow meter installed in a pipe connected to a secondary side outlet of the post-stage filtration apparatus. Controlled by the outflow amount of treated water filtered by a filtration device (hereinafter referred to as “second-stage treated water”),
The amount of raw water flowing into the pre-stage filtration device is controlled by a numerical value that takes into account a predetermined amount based on the water level of the pre-stage filtration device or the outflow amount of the post-stage treated water,
The water treatment system according to claim Rukoto operation control system of the preceding filtering device and the subsequent filtering devices are uniform. 請求項１に記載の水処理システムにおいて、
前記前段ろ過装置の２次側の出口に設置されている圧力計の圧力又は前記前段ろ過装置の水位が設定値から外れた場合に、前記ポンプの運転が停止されると共に前記前段ろ過装置及び前記後段ろ過装置の運転が停止される制御を行うことを特徴とする水処理システム。 The water treatment system according to claim 1,
When the water level in the secondary side of the pressure or the front filtering device of a pressure gauge installed in the outlet of the preceding stage filtration system deviates from the set value, the operation of the pump is stopped Rutotomoni the preceding filtering device and the The water treatment system characterized by performing control which the operation | movement of a back | latter stage filtration apparatus is stopped . 請求項１または請求項２に記載の水処理システムにおいて、
前記前段ろ過装置への原水の流入量が、前記ポンプで前記後段ろ過装置へ圧送される前記前段処理水の流入量より多くなることにより発生する前記前段処理水のオーバーフローを前記前段ろ過装置の流入口より前に戻すことを特徴とする水処理システム。 In the water treatment system according to claim 1 or 2,
The inflow of raw water to the preceding stage filtration device, the flow of the overflow of the pretreatment water the preceding filtering device for generating a number made possible than the inflow amount of the pre-processing water to be pumped into the later stage filtration apparatus in the pump A water treatment system characterized by being returned before the entrance. 請求項１乃至３のいずれか１項に記載の水処理システムにおいて、
前記前段ろ過装置が上向流砂ろ過装置、下向流砂ろ過装置、または横流式砂ろ過装置の中のいずれかであることを特徴とする水処理システム。 The water treatment system according to any one of claims 1 to 3 ,
The water treatment system is characterized in that the pre-stage filtration device is one of an upward flow sand filtration device, a downward flow sand filtration device, or a cross flow type sand filtration device. 請求項１乃至４のいずれか１項に記載の水処理システムにおいて、
前記後段ろ過装置が膜ろ過装置、急速砂ろ過装置、または活性炭ろ過装置の中のいずれかであることを特徴とする水処理システム。 In the water treatment system according to any one of claims 1 to 4 ,
The water treatment system, wherein the latter-stage filtration device is one of a membrane filtration device, a rapid sand filtration device, or an activated carbon filtration device.
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