JPS62186911A - Sand filter - Google Patents
Sand filterInfo
- Publication number
- JPS62186911A JPS62186911A JP2756186A JP2756186A JPS62186911A JP S62186911 A JPS62186911 A JP S62186911A JP 2756186 A JP2756186 A JP 2756186A JP 2756186 A JP2756186 A JP 2756186A JP S62186911 A JPS62186911 A JP S62186911A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- nozzle
- filter tank
- outlet
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004576 sand Substances 0.000 title claims abstract description 146
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000005406 washing Methods 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 11
- 238000009287 sand filtration Methods 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000010865 sewage Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 238000001914 filtration Methods 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 9
- 238000011001 backwashing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明及びこの発明と異なった別の発明は、炉材を用
いて汚水をＦ遇する砂ろ過槽と、炉材を洗浄する洗浄槽
との間に炉材を循還し、濾過と炉材の再生とを連続的に
行う砂ろ過装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention and another invention different from this invention provide a sand filter tank that filters wastewater using a furnace material, and a cleaning tank that cleans the furnace material. The present invention relates to a sand filtration device that continuously performs filtration and regeneration of the furnace material by circulating the furnace material during the sand filtering process.
砂ろ過装置は、汚水を砂ろ過槽に槽の上部よシ注入し、
砂ろ過槽内の炉材、即ち砂で汚水を濾過し、濾過後の処
理水を砂ろ過槽の外に槽の下部より排出するものである
が、汚水中の浮遊物が砂の表面に近い層に多く捕捉され
るため、砂を洗浄して、浮遊物を砂より除去する逆洗の
操作及び逆洗設備を必要としている。Sand filter equipment injects wastewater into a sand filter tank from the top of the tank.
Wastewater is filtered through the furnace material in the sand filter tank, i.e. sand, and the treated water after filtration is discharged outside the sand filter tank from the bottom of the tank, but suspended matter in the wastewater is close to the surface of the sand. Since a large amount of sand is trapped in the layer, backwashing operations and backwashing equipment are required to wash the sand and remove suspended matter from the sand.
従来の砂ろ過装置は、逆洗設備として、洗浄水を砂ろ過
槽に槽の下部よシ流入させ、洗浄水を砂ろ過槽の下部よ
り上部に上昇させながら流す過程で砂に補捉された浮遊
物を砂より除去して砂を洗浄し、その後、浮遊物の含ま
れた洗浄水を砂ろ過槽の外に槽の上部より流出させるも
のであった。Conventional sand filtration equipment is used as backwashing equipment, where wash water flows into the sand filter tank from the bottom of the tank, and during the process of flowing the wash water from the bottom to the top of the tank, the water is captured by the sand. Floating substances were removed from the sand, the sand was washed, and then the washing water containing the floating substances was drained out of the sand filter tank from the top of the tank.
従来の砂ろ過装置は、逆洗設備が前記のような構成をし
ているので、汚水中の浮遊物が砂の表面に近い層に多く
補捉されるため、砂を通過する水の流れが短時間で悪く
なると共に、濾過を中断して、浮遊物を砂より除去する
砂の逆洗操作をひんばんに行う必要が生じる等の問題点
を有していたうこの発明及びこの発明と異なった別の発
明は、前記のような従来のもののもつ問題点を解決して
、濾過とＦ材の再生とを並行して連続的に行うことによ
り砂を通過する水の流れを良くすると共Ｋ。In conventional sand filtration equipment, the backwashing equipment has the above-mentioned configuration, so much of the suspended matter in the wastewater is captured in the layer near the sand surface, which slows down the flow of water through the sand. This invention differs from the present invention and the above invention, which had problems such as the sand becoming bad in a short period of time and the need to interrupt filtration and frequently backwash the sand to remove suspended matter from the sand. Another invention solves the problems of the conventional ones as described above, and improves the flow of water passing through the sand by continuously performing filtration and regeneration of the F material in parallel. .
Ｐ２Ｎ２を中断する砂の逆洗操作を不要にすること等を
可能にした砂ろ過装置を提供することを目的とするもの
である。It is an object of the present invention to provide a sand filtration device that makes it possible to eliminate the need for a sand backwashing operation that interrupts P2N2.
この発明に係る砂ろ過装置は、砂を入れた砂ろ過槽と、
砂を洗浄して新規なものに再生する洗浄塔と、噴出する
水によって砂ろ過槽内の砂の表層を吸込み、洗浄塔に砂
を流入させるノズルＡと、噴出する水によって洗浄塔の
底部に沈積した再生された砂を吸込み、砂ろ過槽に流入
させるノズルＣと、ノズルＣから噴出する水と吸込んだ
砂とを分離する、砂ろ過槽内のノズルＣの出口に取付け
た砂流出口とを備えたものである。A sand filter device according to the present invention includes a sand filter tank containing sand,
A cleaning tower that cleans sand and regenerates it into new material, a nozzle A that uses spouted water to suck in the surface layer of sand in the sand filtration tank and flows the sand into the cleaning tower, and A nozzle C that sucks in the deposited recycled sand and flows into the sand filter tank, and a sand outlet installed at the outlet of the nozzle C in the sand filter tank that separates the water spouted from the nozzle C and the sucked sand. It is prepared.
また、この発明と異なった別の発明に係る砂原過装置は
、砂を入れた砂ろ過槽と、砂を洗浄して新規なものに再
生する洗浄塔と、噴出する水によって砂ろ過槽内の砂の
表層を吸込み、洗浄塔に砂を流入させるノズルＡと、噴
出する水によって洗浄塔の底部に沈積した再生された砂
を吸込み、砂ろ過槽に流入させるノズルＣと、ノズルＣ
から噴出する水と吸込んだ砂とを分離する、砂ろ過槽内
のノでルＣの出口に取付けた砂流出口と、ノズルＡ及び
ノズルＣの少なくとも一方に組込んだ、砂を搬送するス
クリューコンベア等の搬送装置とを備えたものである。In addition, a sand filter device according to another invention different from this invention includes a sand filter tank containing sand, a washing tower that washes the sand and regenerates it into a new product, and a sand filter tank that uses spouted water to clean the sand filter tank. Nozzle A that sucks in the surface layer of sand and flows the sand into the cleaning tower; Nozzle C that sucks the recycled sand deposited at the bottom of the cleaning tower by spouting water and flows it into the sand filter tank;
A sand outlet installed at the outlet of nozzle C in the sand filter tank, which separates the water spouted from the sand and the sand sucked in, and a screw conveyor that conveys the sand, which is installed in at least one of nozzle A and nozzle C. It is equipped with a transport device such as the following.
最初に、この発明の実施例を図面に基づいて説明する。 First, embodiments of the present invention will be described based on the drawings.
第１図はこの発明の実施例の概略構成図を示しており、
砂ろ過槽（１） Ｋは炉材となる砂（２）が入れられ、
砂表面（２ａ）は砂ろ過槽（１）の上端部（ｌａ）の下
方に位置している。砂ろ過槽（１）の砂表面（２ａ）よ
シ下方に位置するところにはノズルＡ（３）が水平に取
付けられている。ノズルＡ（３）は噴出する水によるエ
ジェクタ効果によって表層の砂（２）を吸込むことがで
きるようになっている。ノズルＡ１３）の出口（３ａ）
は砂（２）を洗浄する洗浄塔（４）が塔の高さの途中で
接続されているう洗浄塔（４）の下部にはノイルＢ（５
）が設けられ、ノでルＢ（５）より噴出する水が洗浄塔
（４）内を下部より上部に向って流れるようになってい
る。洗浄塔（４）の底部にはノズルＣ（６）が水平に取
付けられ、ノでルＣ１６）は噴出する水によるエジェク
タ効果によって洗浄塔（４）の底部に沈積した洗浄後の
砂（２）を吸込むことができるようになっている。ノズ
ルＣ（６）の先端部は砂ろ過＠＋１１に取付けられ、砂
ろ過槽（１）内のノズルＣ（６）の出口（６ａ）には水
と砂（２）とを分離しながら砂（２）を砂ろ過槽（１）
の底部より流出させる砂流出口（７）が取付けられてい
る。FIG. 1 shows a schematic configuration diagram of an embodiment of the present invention,
Sand filter tank (1) K is filled with sand (2) which will become the furnace material.
The sand surface (2a) is located below the upper end (la) of the sand filter tank (1). A nozzle A (3) is installed horizontally below the sand surface (2a) of the sand filter tank (1). The nozzle A (3) is capable of sucking in the sand (2) on the surface layer by the ejector effect of the jetted water. Outlet (3a) of nozzle A13)
A cleaning tower (4) for cleaning sand (2) is connected midway up the height of the tower.Noil B (5) is installed at the bottom of the cleaning tower (4).
) is provided so that water spouted from the nozzle B (5) flows from the bottom to the top inside the washing tower (4). A nozzle C (6) is installed horizontally at the bottom of the cleaning tower (4), and the nozzle C16) removes the washed sand (2) deposited at the bottom of the cleaning tower (4) by the ejector effect of the jetting water. It is now possible to inhale. The tip of the nozzle C (6) is attached to the sand filter @+11, and the outlet (6a) of the nozzle C (6) in the sand filter tank (1) separates water and sand (2). 2) Sand filter tank (1)
A sand outlet (7) is installed to allow sand to flow out from the bottom.
砂洲過槽（１）の下部には砂１２）で濾過された処理水
を槽外に流出させる流出口（８）が設けられている。An outlet (8) is provided at the bottom of the sand bar filter tank (1) to allow the treated water filtered through the sand 12) to flow out of the tank.
流出口（８）は一端が閉塞し、他端が開口した管ででき
ており、その管壁には多数の小孔（８ａ）が設けられて
いる。砂ろ過槽（１）の槽外に流出する処理水は流出口
（８）を通って処理槽（９）に流入している。処理槽（
９）内の処理水は処理槽（９）よシ放流されるが、処理
水の一部はポンプＱｌによりて吸引されている。The outlet (8) is made of a tube with one end closed and the other end open, and a large number of small holes (8a) are provided in the tube wall. The treated water flowing out of the sand filter tank (1) flows into the treatment tank (9) through the outlet (8). Processing tank (
The treated water in the tank (9) is discharged to the treatment tank (9), but a part of the treated water is sucked in by the pump Ql.
ポン７’ｔｌｌより吐出した処理水は、ノズルＡ（３）
と、ノズルＢ（５）と、ノズルＣ（６）とに導かれてい
る。The treated water discharged from pump 7'tll is transferred to nozzle A (3).
, nozzle B (5), and nozzle C (6).
なお、洗浄塔（４）の上部には放流口（４ａ）が設けら
れ、ノズルＢ（５）より噴出した処理水が洗浄塔（４）
内を下部より上部に向って流れる過程で、ノズルＡ（３
）によって洗浄槽（４）内に送られてくる砂（２）を洗
浄し、洗浄後の処理水を放流口（４ａ）より流出させる
ことができるようＫなっている。また、砂流出口（７）
には排出口（７＆）が設けられ、砂流出口（力で砂（２
）と分離されたノズルＣ（６）より噴出した処理水を流
出口（７ａ）より排出し、処理槽（９）に導いている。Note that a discharge port (4a) is provided at the top of the cleaning tower (4), and the treated water spouted from the nozzle B (5) flows into the cleaning tower (4).
In the process of flowing from the bottom to the top, nozzle A (3
) to wash the sand (2) sent into the washing tank (4), and allow the washed treated water to flow out from the outlet (4a). Also, sand outlet (7)
A sand outlet (7 &) is provided in the
) The treated water spouted from the nozzle C (6) separated from the nozzle C (6) is discharged from the outlet (7a) and guided to the treatment tank (9).
αｐは空気噴出用ノズルである。αp is an air jet nozzle.
第２図は砂流出口（７）の詳細を示す斜視図を示してお
シ、砂流出口（７）は、砂（２）と分離された処理水分
排出させる排出口（７ａ）が分離筒（７ｂ）の上部に取
付けられている。分離筒（７ｂ）は下方が開口し、開口
した部分より処理水から分離された砂（２）が流出する
よりになっている。分離筒（７ｂ）にはノズル０７６）
の出口（６ａ）が取付けられ、砂（２）と処理水との混
合物が分離筒（７ｂ）の接線方向より分離筒（７ｂ］Ｃ
流入し、分ＡＶ筒（７ｂ）内で旋回する過程で、砂（２
）と処理水とが分離できるよう釦なっている。Figure 2 shows a perspective view showing the details of the sand outlet (7). ) is attached to the top of the The separation cylinder (7b) is open at the bottom, and the sand (2) separated from the treated water flows out from the open part. Separation tube (7b) has nozzle 076)
An outlet (6a) is installed, and the mixture of sand (2) and treated water flows from the tangential direction of the separation cylinder (7b) to the separation cylinder (7b]C.
Sand (2
) and treated water can be separated.
作用について説明する。The effect will be explained.
汚水が砂ろ過Ｍ（１）の上部に流入すると、汚水は砂（
２）Ｋよって濾過され、処理水となって流出口（８）よ
り処理槽（９）に流入する。処理槽／９１内の処理水の
一部をボン７’（Ｉｌで吸引し、ノズルＡ（３）と、ノ
ズル３１ｊ’５）と、ノズルＣ（６）とよ＃）噴出させ
る。ノズルＡ（３）より噴出する処理水のエノエクタ効
果によって、汚水の濾過中に汚水中の浮遊物を多く捕捉
した砂表面（２ａ）に近い層の砂（２）がノズルＡ（３
）内に吸込まれ、ノズルＡ（３）内で砂；２）と処理水
との混合物になったものが、洗浄塔（４）に流入するよ
うになる。洗浄塔（４）内に流入した砂（２）は、重力
の作用で洗浄塔（４）内の底部に沈降しようとする。そ
の場合、ノズルＢ（５）より噴出した処理水が洗浄塔（
４）内を下方より上方に流れているので、砂（２）は沈
降する過程でノズルＢ（５）よシ噴出した処理水によっ
て洗浄されるようになる。洗浄により新しく再生された
砂（２）は洗浄塔（４）の底部に沈積されるが、沈積さ
れた砂＋２）はノズルＣ（６）よシ噴出する処理水のエ
ノエクタ効果Ｐζよって、ノズルＣ（６）内に吸込まれ
、ノズルＣ（６）内で砂（２）と処理水との混合物にな
ったのが砂流出Ｄ ｆ７）に導かれるようになる。砂（
２）と処理水との混合物は砂流出口（力の分＠ ｆＩ
（７ｂ）内で旋回運動をする過程で、砂／２）と処理水
とが分離され、処理水は排出口（７ａ）を経て処理槽（
９）に戻されるようになるが、砂（２）は分離筒（７ｂ
）の下方の開口した部分より砂ろ過槽（１）内に流入す
るようになる。砂ろ過槽（１）内に流入した砂ｔ２）は
砂ろ過槽（１）内を上方よシ上方に移動し、再びノズル
Ａ（３）によって吸込まれるようになる。即ち、ノズル
Ａ（３）とノズルＣｉ６）との働きによって、砂（２）
は砂ろ過＠ （１）と洗浄塔（４）との間を連続的に微
速されるようになり、砂ろ過槽（１）での濾過と、洗浄
塔（４）での砂（２）の再生とが並行しながら連続的に
進行するようになる。When wastewater flows into the upper part of sand filter M(1), the wastewater flows through sand (
2) It is filtered by K, becomes treated water, and flows into the treatment tank (9) from the outlet (8). A part of the treated water in the treatment tank/91 is sucked in by the bong 7' (Il and spouted out through the nozzle A (3), the nozzle 31j'5), and the nozzle C (6). Due to the enoecta effect of the treated water ejected from the nozzle A (3), the layer of sand (2) near the sand surface (2a) that has captured a lot of suspended matter in the wastewater during filtration of the wastewater is transferred to the nozzle A (3).
) is sucked into the nozzle A (3) and becomes a mixture of sand (2) and treated water, which then flows into the cleaning tower (4). The sand (2) that has flowed into the cleaning tower (4) tends to settle to the bottom of the cleaning tower (4) due to the action of gravity. In that case, the treated water spouted from nozzle B (5) will be transferred to the cleaning tower (
4) Since the sand (2) flows from the bottom to the top, the sand (2) is washed away by the treated water jetted out from the nozzle B (5) during the settling process. The sand (2) newly regenerated by washing is deposited at the bottom of the washing tower (4), but the deposited sand +2) is transferred to the nozzle C (6) due to the enoecta effect Pζ of the treated water spouted out from the nozzle C (6). (6), and the mixture of sand (2) and treated water in nozzle C (6) is led to sand outflow D f7). sand(
2) and the treated water is mixed with the sand outlet (force part @ fI
In the process of rotating inside (7b), sand/2) and treated water are separated, and the treated water passes through the outlet (7a) to the treatment tank (
9), but the sand (2) is returned to the separation tube (7b).
) will flow into the sand filter tank (1) from the lower open part. The sand t2) that has flowed into the sand filter tank (1) moves upward within the sand filter tank (1) and is again sucked into the nozzle A (3). That is, by the action of nozzle A (3) and nozzle Ci6), sand (2)
Sand filtration @ (1) and washing tower (4) are carried out continuously at a slow speed, and filtration in sand filter tank (1) and sand (2) in washing tower (4) are performed. Regeneration will proceed continuously in parallel.
次に、この発明と異なる別の発明の実施例について説明
する。この発明と異なる別の発明の実施例は、第１図及
び第２図に示すこの発明の実施例に付加して、ノズルＡ
（３）及びノズルＣ（６）の双方に、砂を搬送するスク
リーーコンベア等の搬送装置（図示せず）を組込んでい
る。そのため、ノズルＡ（３）及びノズルＣ（６）中の
砂が、この搬送装置によっても搬送されるようになる。Next, an embodiment of another invention different from this invention will be described. Another embodiment of the invention different from this invention includes a nozzle A in addition to the embodiment of the invention shown in FIGS. 1 and 2.
(3) and nozzle C (6) are both equipped with a conveying device (not shown) such as a scree conveyor for conveying sand. Therefore, the sand in nozzle A (3) and nozzle C (6) is also transported by this transport device.
この発明と異なる別の実施例では、ノズルＡ（３）及び
ノズル（Ｃ）の双方に、搬送装置を組込んでいるが、こ
れに限定されることなく、ノズルＡ（３）又はノでルＣ
ｉ６）のいずれか一方にのみ、搬送装置を組込んでもよ
い。In another embodiment different from this invention, a conveying device is incorporated in both nozzle A (3) and nozzle (C), but the present invention is not limited to this. C
A conveyance device may be incorporated only in either one of i6).
この発明及びこの発明と異なった別の発明は以上のよう
に濾過と炉材の再生とを並行して連続的に進行させるの
で、砂ろ過槽内の砂を通過する水の流れが良くなると共
に、濾過を中断して砂の逆洗操作が不要になる等の効果
を有している。In this invention and another invention different from this invention, as described above, filtration and regeneration of the furnace material proceed continuously in parallel, so that the flow of water passing through the sand in the sand filter tank is improved and This has the effect of interrupting filtration and eliminating the need for sand backwashing.
第１図はこの発明の実施例の概略構成図、第２図は砂流
出口の詳細を示す斜視図である。
１・・・砂ろ過槽
２・・・砂
３・・ノズルＡ
４・・洗浄塔
６・・ノズルＣ
７・・・砂流出口
代理人 弁理士 宮 崎 明
第１１２１１
ミ；
７に
第２図FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and FIG. 2 is a perspective view showing details of a sand outlet. 1...Sand filter tank 2...Sand 3...Nozzle A 4...Cleaning tower 6...Nozzle C 7...Sand outlet agent Patent attorney Akira Miyazaki No. 11211 Mi; 7 and Figure 2
Claims (2)
に再生する洗浄塔と、噴出する水によって砂ろ過槽内の
砂の表層を吸込み、洗浄塔に砂を流入させるノズルＡと
、噴出する水によって洗浄塔の底部に沈積した再生され
た砂を吸込み、砂ろ過槽に流入させるノズルＣと、ノズ
ルＣから噴出する水と吸込んだ砂とを分離する、砂ろ過
槽内のノズルＣの出口に取付けた砂流出口とを備えたこ
とを特徴とする砂ろ過装置。(1) A sand filter tank containing sand, a washing tower that washes the sand and regenerates it into new material, and a nozzle that uses spouted water to suck in the surface layer of sand in the sand filter tank and flow the sand into the washing tower. A, a nozzle C that sucks the recycled sand deposited at the bottom of the cleaning tower by the spouting water and flows it into the sand filter tank, and a sand filter tank that separates the water spouted from the nozzle C and the sand that has been sucked in. A sand filtration device comprising a sand outlet attached to the outlet of the nozzle C.
に再生する洗浄塔と、噴出する水によって砂ろ過槽内の
砂の表層を吸込み、洗浄塔に砂を流入させるノズルＡと
、噴出する水によって洗浄塔の底部に沈積した再生され
た砂を吸込み、砂ろ過槽に流入させるノズルＣと、ノズ
ルＣから噴出する水と吸込んだ砂とを分離する、砂ろ過
槽内のノズルＣの出口に取付けた砂流出口と、ノズルＡ
及びノズルＣの少なくとも一方に組込んだ、砂を搬送す
るスクリューコンベア等の搬送装置とを備えたことを特
徴とする砂ろ過装置。(2) A sand filter tank filled with sand, a washing tower that washes the sand and regenerates it into new material, and a nozzle that uses spouted water to suck in the surface layer of sand in the sand filter tank and flow the sand into the washing tower. A, a nozzle C that sucks the recycled sand deposited at the bottom of the cleaning tower by the spouting water and flows it into the sand filter tank, and a sand filter tank that separates the water spouted from the nozzle C and the sand that has been sucked in. Sand outlet installed at the outlet of nozzle C and nozzle A
and a conveying device such as a screw conveyor for conveying sand, which is incorporated in at least one of the nozzles C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2756186A JPS62186911A (en) | 1986-02-10 | 1986-02-10 | Sand filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2756186A JPS62186911A (en) | 1986-02-10 | 1986-02-10 | Sand filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62186911A true JPS62186911A (en) | 1987-08-15 |
Family
ID=12224450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2756186A Pending JPS62186911A (en) | 1986-02-10 | 1986-02-10 | Sand filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62186911A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036239A1 (en) * | 2000-11-06 | 2002-05-10 | Nihon Genryo Co., Ltd. | Filter sand washing method and its system |
| KR100674383B1 (en) | 2006-03-03 | 2007-01-25 | 대한기업주식회사 | About purification plant filter paper remaking method of layer |
| NL1030488C2 (en) * | 2005-11-22 | 2007-05-23 | Hofmeijer Mechanics B V | Cleaning installation for sand used for water purification, comprises devices for rinsing sand with water and rubbing grains together |
-
1986
- 1986-02-10 JP JP2756186A patent/JPS62186911A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036239A1 (en) * | 2000-11-06 | 2002-05-10 | Nihon Genryo Co., Ltd. | Filter sand washing method and its system |
| NL1030488C2 (en) * | 2005-11-22 | 2007-05-23 | Hofmeijer Mechanics B V | Cleaning installation for sand used for water purification, comprises devices for rinsing sand with water and rubbing grains together |
| KR100674383B1 (en) | 2006-03-03 | 2007-01-25 | 대한기업주식회사 | About purification plant filter paper remaking method of layer |
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