JP2001129313A - Apparatus for pumping up sand and operation method thereof - Google Patents
Apparatus for pumping up sand and operation method thereofInfo
- Publication number
- JP2001129313A JP2001129313A JP31233099A JP31233099A JP2001129313A JP 2001129313 A JP2001129313 A JP 2001129313A JP 31233099 A JP31233099 A JP 31233099A JP 31233099 A JP31233099 A JP 31233099A JP 2001129313 A JP2001129313 A JP 2001129313A
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- Prior art keywords
- sand
- collecting pit
- nozzle
- pump
- nozzles
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は廃水処理施設の沈砂
池に堆積した沈砂を除去するための揚砂装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand lifting device for removing sand deposited in a sand basin of a wastewater treatment facility.
【０００２】[0002]
【従来の技術】従来より、沈砂池に堆積した沈砂を除去
するために、池底にノズルを配置して、このノズルから
圧力水を噴射して堆積した砂を押し流して、これを別途
設けた集砂ピットへ集め、集砂ピット中に配置した揚砂
ポンプで水と一緒に砂を池外に排出する揚砂装置が使用
されている。特開平７−１００３０５号公報（公知例
）には、沈砂池の幅方向中央部に集砂ピットに向けて
トラフを設け、そのトラフに向けて直交するように小ト
ラフを多数設け、各小トラフ間の上端部に圧力水を噴出
するノズルを配設し、集砂ピットに集められた砂を揚砂
ポンプである水中サンドポンプを配設した揚砂装置が開
示されている。この揚砂装置を運転するときは、沈砂池
を空にして池底を露出させたうえでノズルから圧力水を
噴出して、池底に堆積した砂を水流と共に小トラフ、ト
ラフを経由して集砂ピットに集め、そこから揚砂ポンプ
で沈砂池外に排出するものである。2. Description of the Related Art Conventionally, in order to remove sediment deposited in a sand basin, a nozzle is arranged at the bottom of the pond, and the deposited sand is jetted out by spraying pressure water from the nozzle and separately provided. A sand-lifting device is used, which collects sand in a sand-collecting pit, and discharges sand to the outside of the pond together with water by a sand-lifting pump arranged in the sand collecting pit. In Japanese Patent Application Laid-Open No. 7-100305 (known example), a trough is provided at the center in the width direction of a sand basin toward a sand collecting pit, and a number of small troughs are provided so as to be orthogonal to the trough. There is disclosed a sand lifting device in which a nozzle for ejecting pressurized water is disposed at an upper end portion between the nozzles and an underwater sand pump which is a sand pump for discharging sand collected in a sand collecting pit. When operating this sand-lifting device, after emptying the sand basin and exposing the bottom of the pond, pressure water is blown out from the nozzle, and the sand deposited on the bottom of the pond along with the water flow is passed through the small trough and trough. They are collected in a sand collecting pit and discharged from the sand basin by a sand pump.
【０００３】また特開平８−２２９３１０号公報（公知
例）には、沈砂池の底面を上流側から下流側に傾斜し
て形成し、その下流端に沈砂ピットを設け、沈砂ピット
内にジェットポンプを配設し、沈砂池の底面には原水の
流れ方向に圧力水を噴出するノズルを配設した揚砂装置
が開示されている。この揚砂装置を運転するときは、原
水の流入を停止させて、水位が所定レベルまで下がって
から、圧力水を噴出するものであり、その他の動作は前
記のものと同じである。Japanese Patent Application Laid-Open No. 8-229310 (known example) discloses that a bottom of a sand basin is formed to be inclined from upstream to downstream, a sand pit is provided at the downstream end, and a jet pump is provided in the sand pit. And a nozzle for discharging pressurized water in the direction of flow of raw water on the bottom surface of a sand basin is disclosed. When operating this sand lifting device, the inflow of raw water is stopped, and after the water level falls to a predetermined level, pressure water is ejected, and the other operations are the same as those described above.
【０００４】[0004]
【発明が解決しようとする課題】しかし前記した公知例
の揚砂装置は、沈砂池の池底が露出する程度まで水を
空にする必要があり、そのために多大な手数を要すると
いう問題点がある。又公知例の揚砂装置は、ジエット
ポンプを使用しているため、これを作動させるための動
力が大きいという問題点がある。本発明は上記した問題
点を改善して、比較的容易に揚砂作業を行うことがで
き、しかも動力も小さい揚砂装置を提供することを目的
とする。However, the above-mentioned known sand-lifting apparatus has a problem that it is necessary to empty the water to such an extent that the bottom of the sand basin is exposed, which requires a great deal of trouble. is there. Moreover, since the known sand lifting device uses a jet pump, there is a problem that a large power is required to operate the jet pump. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a sand-lifting device which can perform sand-lifting work relatively easily and has small power.
【０００５】[0005]
【課題を解決するための手段】第１の発明は、沈砂池の
所定位置に集砂ピットを設け、該集砂ピットに向けて水
を噴出するように複数のノズルを設け、前記集砂ピット
中に位置するように揚砂ポンプを配置した揚砂装置にお
いて、沈砂池の底面に集砂ピットに向けて複数の凹凸条
を設けると共に、各凹条に複数個のノズルを配設し、凹
条は金属製のトラフを埋め込んで形成したことを特徴と
するものである。第２の発明は、沈砂池への汚水の流入
方向から順に集砂ピット、ノズル、ポンプ井を設け、ポ
ンプ井中の汚水の一部をノズルに供給して噴出すること
を特徴とするものである。本発明では沈砂池への汚水の
流入方向から順にノズル、集砂ピット、ノズル、ポンプ
井を設けることもできる。上記発明では、複数箇のノズ
ルを複数のノズル群に分割し各ノズル群が独立して汚水
を噴出できるようにしてもよい。第３の発明は、集砂ピ
ット、複数箇のノズル、ポンプ井を設けた沈砂池で、前
記複数箇のノズルを複数のノズル群に分割して配置し、
集砂ピット中に揚砂ポンプを昇降自在に配置し、ノズル
から水を噴出して底面に堆積した沈砂を集砂ピットに移
送して、それを揚砂ポンプで沈砂池外に排出する揚砂装
置の運転方法であって、各ノズル群にポンプ井からの汚
水の一部を供給し、各ノズル群の内１つ毎のノズル群か
ら水を順次噴出することを特徴とするものである。According to a first aspect of the present invention, a sand collecting pit is provided at a predetermined position of a sand basin, and a plurality of nozzles are provided so as to jet water toward the sand collecting pit. In a sand-lifting device in which a sand-lifting pump is arranged so as to be located inside, a plurality of uneven strips are provided on the bottom of the sand basin toward the sand collecting pit, and a plurality of nozzles are arranged in each recess, The strip is characterized by being formed by embedding a metal trough. The second invention is characterized in that a sand collecting pit, a nozzle, and a pump well are provided in order from the inflow direction of sewage into a settling basin, and a part of the sewage in the pump well is supplied to the nozzle and jetted. . In the present invention, a nozzle, a sand collecting pit, a nozzle, and a pump well can be provided in order from the inflow direction of the sewage into the sand basin. In the above invention, a plurality of nozzles may be divided into a plurality of nozzle groups so that each nozzle group can independently discharge sewage. A third invention is a sand basin provided with a sand collection pit, a plurality of nozzles, and a pump well, wherein the plurality of nozzles are divided into a plurality of nozzle groups and arranged.
A sand pump is placed in the sand collecting pit so as to be able to move up and down freely, and water is ejected from the nozzle to transfer the sediment deposited on the bottom to the sand collecting pit, where it is discharged to the outside of the sand basin by the sand pump. A method of operating the apparatus, wherein a part of the sewage from a pump well is supplied to each nozzle group, and water is sequentially ejected from each nozzle group of each nozzle group.
【０００６】[0006]
【発明の実施の形態】本発明の揚砂装置の一実施の形態
を図面を参照して説明する。図１は本発明の揚砂装置に
係わる全体的なシステムを示す概略図である。１は沈砂
池であり、汚水はＩ方向から流入し、その汚水流入側に
スクリーン２が取付けられており、これで沈砂池１に流
入する汚水中の比較的大きい浮遊物を除去する。汚水流
入側の池底には集砂ピット３が設けられて、その集砂ピ
ット３の中に揚砂ポンプ４が配設される。揚砂ポンプ４
は図示しない昇降装置で昇降することができ、通常は汚
水面より上に引き上げられており、揚砂作業の時のみ下
降させて集砂ピット４内に配置する。池底には複数個の
ノズル５がその噴出水が集砂ピット３の方向に向くよう
に配設されており、ノズル５には管路を介して圧力水ポ
ンプ６が連結されており水槽７から圧力水をノズル５へ
供給する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the sand lifting device of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an overall system relating to the sand lifting device of the present invention. Reference numeral 1 denotes a sand basin, in which sewage flows in from the I direction, and a screen 2 is attached to the sewage inflow side, whereby relatively large suspended matter in the sewage flowing into the sand basin 1 is removed. A sand collecting pit 3 is provided at the bottom of the pond on the sewage inflow side, and a sand pump 4 is disposed in the sand collecting pit 3. Sand pump 4
Can be raised and lowered by a lifting device (not shown), and is usually lifted above the sewage level, and is lowered and placed in the sand collecting pit 4 only during sand lifting work. A plurality of nozzles 5 are disposed at the bottom of the pond so that the jetted water is directed toward the sand collecting pit 3. A pressure water pump 6 is connected to the nozzles 5 via a pipe, and a water tank 7 is provided. Supply pressure water to the nozzle 5.
【０００７】沈砂池１の汚水流出側にポンプ井８を設け
て、砂が除去された汚水をここに溜め込み、これを排出
ポンプ１４で次の工程に移送すると共に、汚水の一部を
供給ポンプ９で水槽７へ供給する。こうすることでノズ
ル５から噴出される圧力水は除砂処理された汚水を使用
できるから用水の使用量を低減することができる。前記
の揚砂ポンプ４の吐出端には管路を介して固液分離機１
０が連結されており、ここで砂と汚水を分離して各々適
宜に処理を行う。A pump well 8 is provided on the sewage outflow side of the sand basin 1 to store sewage from which sand has been removed, and the sewage is transferred to the next step by a discharge pump 14, and a part of the sewage is supplied to a supply pump. At 9 the water is supplied to the water tank 7. By doing so, the pressurized water ejected from the nozzle 5 can use the sewage subjected to sand removal treatment, so that the amount of water used can be reduced. The solid-liquid separator 1 is connected to the discharge end of the above-mentioned sand pump 4 via a pipe line.
0 is connected, where sand and sewage are separated and appropriately treated.
【０００８】図２は本発明の揚砂装置に係わる一実施の
形態を示す平面図であり、図３は図２のＸ−Ｘ断面図で
ある。沈砂池１の流入端部に設けた集砂ピット３に向け
て下り勾配になるように、池底にモルタルで４列の凹凸
条１１，１２が形成されており、各々の凹条１１中にＳ
ＵＳ３０４製のトラフ１３が敷設されると共に、各凹条
１１の底部にはノズル５が集砂ピット３に向けて１列で
６箇設けられている。FIG. 2 is a plan view showing an embodiment of the sand lifting device of the present invention, and FIG. 3 is a sectional view taken along line XX of FIG. Four rows of ridges 11 and 12 of mortar are formed at the bottom of the pond so as to have a downward slope toward the sand collecting pit 3 provided at the inflow end of the sand basin 1. S
A trough 13 made of US304 is laid, and six nozzles 5 are provided at the bottom of each groove 11 in a row toward the sand collecting pit 3.
【０００９】凸条１２及び凹条１１を設けて、その底部
にノズル５を配置することにより、ノズル５からの噴出
水と砂が凹条１１内の比較的狭い範囲に集中して存在す
るから、噴出水の運動エネルギーを有効に使用すること
ができる。凹条１１内にＳＵＳ３０４製のトラフ１３を
敷設した点については、それとコンクリートそのもので
の砂の流下実験を行い、ＳＵＳ３０４製のトラフを敷設
した方がコンクリートよりも砂のスベリが良好であると
いう知見を得て採用したものである。樹脂製のトラフも
砂のスベリは良好であったが、摩耗の点で金属にはおよ
ばなかった。By providing the ridge 12 and the ridge 11 and arranging the nozzle 5 at the bottom thereof, the water and sand ejected from the nozzle 5 are concentrated in a relatively narrow area within the ridge 11. In addition, the kinetic energy of the jet water can be used effectively. Regarding the point where the SUS304 trough 13 was laid in the concave strip 11, a sand flow experiment was conducted with the SUS304 trough and the concrete itself. And adopted. The resin trough also had good sand sliding, but did not reach the metal in terms of wear.
【００１０】ノズル５は図４に示すように、Ａ群、Ｂ
群、Ｃ群に分けて、各々の群が圧力水を噴出する時を独
立して選べるように管路が形成されている。例えばまず
Ｃ群のノズル５から圧力水を噴出して、その部分に堆積
した砂をＢ群の部分まで押し流して、次にＢ群のノズル
５から圧力水を噴出して砂をＡ群の部分まで押し流し、
次にＡ群のノズル５圧力水を噴出して、その部分にある
砂を集砂ピット３へ移送するものである。そうすること
で、一度にＡ，Ｂ，Ｃ群から圧力水を噴出することと集
砂効果は大差がないが、圧力水ポンプ６の吐出量が１／
３ですみ、この点で必要動力を小さくすることができ
る。又図５に示すように、ノズル５を汚水の流入方向に
ノズル群Ｄ，Ｅ，Ｆ，Ｇに分割してもよい。図１に示し
た実施の形態において、ノズル５からの噴出水がポンプ
井８と反対方向を向くように集砂ピット３、ノズル５、
ポンプ井８を配置したのは、噴出水により押し流される
砂がポンプ井８中に流れ込み難くするためである。[0010] As shown in FIG.
A pipe is formed so that each of the groups can be independently selected at the time of jetting the pressure water. For example, first, pressure water is ejected from the nozzles 5 of the group C, and the sand deposited on that part is washed down to the part of the group B. Flush
Next, the pressure water of the nozzles 5 of the group A is blown out, and the sand in that portion is transferred to the sand collecting pit 3. By doing so, there is no great difference between the fact that the pressure water is ejected from the A, B and C groups at a time and the sand collecting effect, but the discharge amount of the pressure water pump 6 is 1 /
3, the required power can be reduced in this regard. Alternatively, as shown in FIG. 5, the nozzles 5 may be divided into nozzle groups D, E, F, and G in the inflow direction of the wastewater. In the embodiment shown in FIG. 1, the sand collection pit 3, the nozzle 5, and the
The reason why the pump well 8 is arranged is that it is difficult for sand that is washed away by the jet water to flow into the pump well 8.
【００１１】図６は他の実施の形態を示す全体システム
図である。これは沈砂池が長い場合に適用されるもの
で、沈砂池１の中央部に集砂ピット３が設けられてお
り、これに向かって両側からノズル５が配置されている
ものである。他の構成は図２，３，４，５，６に示され
たものと同一であるので説明は省略する。図６に示した
実施の形態においてもノズル５の噴出水により押し流さ
れる砂がポンプ井８中に流れ込み難くするよう、図１同
様の考慮がされている。FIG. 6 is an overall system diagram showing another embodiment. This is applied when the sand basin is long, in which a sand collecting pit 3 is provided in the center of the sand basin 1 and nozzles 5 are arranged from both sides toward the pit 3. The other configuration is the same as that shown in FIGS. Also in the embodiment shown in FIG. 6, the same consideration as in FIG. 1 is made so that the sand pushed by the jet water of the nozzle 5 is hard to flow into the pump well 8.
【００１２】次に実施例について説明する。図１に示し
た構成の沈砂池１で、圧力水ポンプ６として吐出量が３
ｍ３／ｍｉｎで、揚程が１０ｍＡｑ，２０ｍＡｑ，４０
ｍＡｑのポンプを使用し、揚砂ポンプ４として吐出量が
３ｍ３／ｍｉｎで、揚程が１０ｍの水中型サンドポンプ
を使用し、沈砂池１の汚水の水位を通常の水位として、
集砂及び揚砂作業を行った。その結果揚程が２０ｍＡ
ｑ，４０ｍＡｑのポンプを使用した集砂作業では、沈砂
池の底に堆積した砂は実質的に除去されていた。しかし
揚程が１０ｍＡｑのポンプでは堆積した砂の多くが底に
残留しており集砂は不充分であった。又４０ｍＡｑを越
える揚程のポンプでも集砂が行えることは勿論である
が、動力の浪費となるためこの必要性はない。Next, an embodiment will be described. In the sand basin 1 having the configuration shown in FIG.
At m 3 / min, the head is 10 mAq, 20 mAq, 40
Using a pump of mAq, using a submersible sand pump having a discharge rate of 3 m 3 / min and a head of 10 m as the sand pump 4, the water level of the sewage in the sand basin 1 as a normal water level,
Sand collection and lifting operations were performed. As a result, the head is 20mA
In the sand collection operation using a q, 40 mAq pump, sand deposited on the bottom of the sand basin was substantially removed. However, with the pump having a head of 10 mAq, much of the deposited sand remained at the bottom, and the sand collection was insufficient. It is needless to say that sand collection can be performed even with a pump having a head exceeding 40 mAq, but this is not necessary because power is wasted.
【００１３】[0013]
【発明の効果】本発明は上記した構成としたから、沈砂
池中の汚水の水位が高くても集砂、揚砂作業を効率的に
行うことができ、しかも必要とされる動力も低減するこ
とができた。As described above, the present invention has the above-described structure, so that sand collecting and lifting operations can be performed efficiently even when the level of sewage in a sand basin is high, and the required power is reduced. I was able to.
【図１】本発明に係わる実施の一形態の全体を示すシス
テム図である。FIG. 1 is a system diagram showing an entire embodiment according to the present invention.
【図２】本発明に係わる沈砂池の平面図である。FIG. 2 is a plan view of a sand basin according to the present invention.
【図３】図２のＸ−Ｘ断面拡大図である。FIG. 3 is an enlarged cross-sectional view taken along line XX of FIG. 2;
【図４】本発明に係わるノズル群の分割状況の実施の一
形態を示す平面図である。FIG. 4 is a plan view showing an embodiment of a division state of a nozzle group according to the present invention.
【図５】本発明に係わるノズル群の分割状況の実施の他
の形態を示す平面図である。FIG. 5 is a plan view showing another embodiment of the division state of the nozzle group according to the present invention.
【図６】本発明に係わる実施の他の形態の全体を示すシ
ステム図である。FIG. 6 is a system diagram showing the whole of another embodiment according to the present invention.
１ 沈砂池、３ 集砂ピット、４ 揚砂ポンプ、５ ノ
ズル、６ 圧力水ポンプ、７ 水槽、８ ポンプ井、９
供給ポンプ、１１ 凹条、１２ 凸条、１３ 金属製
トラフ、Ａ，Ｂ，Ｃ，Ｄ，Ｅ，Ｆ，Ｇ ノズル群1 settling basin, 3 sand collecting pit, 4 sand pump, 5 nozzle, 6 pressure water pump, 7 water tank, 8 pump well, 9
Supply pump, 11 concave streak, 12 convex streak, 13 metal trough, A, B, C, D, E, F, G nozzle group
Claims (5)
集砂ピットに向けて水を噴出するように複数のノズルを
設け、前記集砂ピット中に位置するように揚砂ポンプを
配置した揚砂装置において、 沈砂池の底面に金属製のトラフからなる複数の凹凸条を
集砂ピットに向けて設け、各凹条に複数個のノズルを配
設したことを特徴とする揚砂装置。1. A sand collecting pit is provided at a predetermined position of a sand basin, a plurality of nozzles are provided so as to jet water toward the sand collecting pit, and a sand pump is located in the sand collecting pit. In the arranged sand lifting device, a plurality of uneven strips composed of metal troughs are provided on the bottom of the settling basin toward the sand collecting pit, and a plurality of nozzles are arranged in each concave strip. apparatus.
集砂ピットに向けて水を噴出するように複数のノズルを
設け、前記集砂ピット中に位置するように揚砂ポンプを
配置した揚砂装置において、 沈砂池への汚水の流入方向から順に集砂ピット、ノズ
ル、ポンプ井を設け、ポンプ井中の汚水を前記ノズルに
供給することを特徴とする揚砂装置。2. A sand collecting pit is provided at a predetermined position of a sand basin, a plurality of nozzles are provided so as to jet water toward the sand collecting pit, and a sand pump is positioned in the sand collecting pit. A sand-lifting device, comprising: a sand-collecting pit, a nozzle, and a pump well, which are sequentially provided from a flowing direction of the wastewater into a sedimentation basin, and the wastewater in the pump well is supplied to the nozzle.
ル、集砂ピット、ノズル、ポンプ井を設け、ポンプ井中
の汚水を前記ノズルに供給することを特徴とする請求項
２記載の揚砂装置。3. The pumping sand according to claim 2, wherein a nozzle, a sand collecting pit, a nozzle, and a pump well are provided in order from the inflow direction of the wastewater into the sand basin, and the wastewater in the pump well is supplied to the nozzle. apparatus.
たことを特徴とする請求項１乃至３のいずれかに記載の
揚砂装置。4. The sand lifting device according to claim 1, wherein a plurality of nozzles are divided into a plurality of nozzle groups.
設けた沈砂池で、前記複数箇のノズルを複数のノズル群
に分割して配置し、集砂ピット中に揚砂ポンプを昇降自
在に配置し、ノズルから水を噴出して底面に堆積した沈
砂を集砂ピットに移送して、それを揚砂ポンプで沈砂池
外に排出する揚砂装置の運転方法であって、 ポンプ井からの汚水を何れか１のノズル群に供給し、汚
水を供給するノズル群を変更することを特徴とする揚砂
装置の運転方法。5. A sand basin provided with a sand collecting pit, a plurality of nozzles, and a pump well, wherein the plurality of nozzles are divided into a plurality of nozzle groups and arranged, and a sand pump is moved up and down in the sand collecting pit. A method of operating a sand pumping device that is freely arranged, ejects water from a nozzle, transfers sediment deposited on a bottom surface to a sand collecting pit, and discharges the sand out of a sand basin by a sand pump. The method of operating a sand lifting device, characterized in that the wastewater from the above is supplied to any one nozzle group, and the nozzle group that supplies the wastewater is changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31233099A JP2001129313A (en) | 1999-11-02 | 1999-11-02 | Apparatus for pumping up sand and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31233099A JP2001129313A (en) | 1999-11-02 | 1999-11-02 | Apparatus for pumping up sand and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001129313A true JP2001129313A (en) | 2001-05-15 |
Family
ID=18027950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31233099A Pending JP2001129313A (en) | 1999-11-02 | 1999-11-02 | Apparatus for pumping up sand and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001129313A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002159803A (en) * | 2000-11-28 | 2002-06-04 | Hitachi Metals Ltd | Sand gathering apparatus and method |
| JP2002282609A (en) * | 2001-03-29 | 2002-10-02 | Hitachi Metals Ltd | Sand-collecting device of sedimentation basin |
| JP2004216215A (en) * | 2003-01-10 | 2004-08-05 | Jfe Engineering Kk | Sand collecting apparatus |
| JP2005152689A (en) * | 2003-11-20 | 2005-06-16 | Hazama Kisetsu Kogyo Kk | Sludge recovery equipment |
| JP2005342568A (en) * | 2004-05-31 | 2005-12-15 | Maezawa Ind Inc | Precipitate removing apparatus |
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| JP2009173970A (en) * | 2008-01-22 | 2009-08-06 | Industria:Kk | Treating tank |
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| JP2015180503A (en) * | 2015-06-19 | 2015-10-15 | アクアインテック株式会社 | Sand sedimentation pond |
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| JP2005342568A (en) * | 2004-05-31 | 2005-12-15 | Maezawa Ind Inc | Precipitate removing apparatus |
| JP2009039698A (en) * | 2007-08-10 | 2009-02-26 | Ebara Environmental Engineering Co Ltd | Sand collecting apparatus |
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| JP2009195785A (en) * | 2008-02-20 | 2009-09-03 | Industria:Kk | Filtration apparatus for treated liquid in treatment vessel and filtration method |
| WO2009104365A1 (en) * | 2008-02-20 | 2009-08-27 | 株式会社ｉｎｄｕｓｔｒｉａ | Device and method for filtering treating liquid in treating tank |
| GB2471222A (en) * | 2008-02-20 | 2010-12-22 | Ind Co Ltd | Device and method for filtering treating liquid in treating tank |
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| US9114417B2 (en) | 2009-02-13 | 2015-08-25 | Honda Motor Co., Ltd. | Nozzle and foreign matter removing device |
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| GB2467846B (en) * | 2009-02-13 | 2011-03-09 | Honda Motor Co Ltd | Nozzle and foreign matter removing device |
| JP2010184207A (en) * | 2009-02-13 | 2010-08-26 | Honda Motor Co Ltd | Nozzle and device for removing foreign matter in tank |
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