JP2002159803A - Sand gathering apparatus and method - Google Patents
Sand gathering apparatus and methodInfo
- Publication number
- JP2002159803A JP2002159803A JP2000361501A JP2000361501A JP2002159803A JP 2002159803 A JP2002159803 A JP 2002159803A JP 2000361501 A JP2000361501 A JP 2000361501A JP 2000361501 A JP2000361501 A JP 2000361501A JP 2002159803 A JP2002159803 A JP 2002159803A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- nozzle
- basin
- sand collecting
- pit
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
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集砂装置および集砂
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand collecting device and a sand collecting method for removing sand deposited in a sand basin of a wastewater treatment facility.
【０００２】[0002]
【従来の技術】従来より、下水中に含まれる砂等を除去
するために、沈砂池を設け底に砂等を沈殿させてこれを
除去する沈砂池設備が使用されている。沈砂池設備では
沈砂池の底に沈殿した砂を一箇所に集めてからポンプや
バケット等の搬送手段で排出することがおこなわれる。
この沈砂池に沈殿した沈砂を一箇所に集めるために、池
底にノズルを配置し、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、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
砂を池の外に排出する沈砂池設備がある。2. Description of the Related Art In order to remove sand and the like contained in sewage, a sand basin has been conventionally used in which a sand basin is provided, and sand and the like are settled at the bottom and removed. In the sand basin equipment, the sand settled at the bottom of the sand basin is collected at one place, and then discharged by a transport means such as a pump or a bucket.
In order to collect the sediment deposited in the sand basin in one place, a nozzle is arranged at the bottom of the pond, pressure water is sprayed from this nozzle to flush away the deposited sand, which is collected in a separately provided sand collection pit, and collected. There is a sand basin facility that discharges sand out of the pond together with water by a sand pump located in the sand pit.
【０００３】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で排出する沈砂池設備が
開示されている。この沈砂池設備から沈砂を除去すると
きは、沈砂池を空にして池底を露出させたうえでノズル
から比較的低圧の圧力水を噴出して、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。この沈砂池設備はノズルからの噴出圧力が小さい
ため動力費用が少なくてすむという利点がある。[0003] In Japanese Patent Application Laid-Open No. 7-100305 (known example), a trough is provided at a central portion 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 basin facility in which a nozzle for jetting pressure water is disposed at an upper end between each small trough and sand collected in a sand collecting pit is discharged by an underwater sand pump as a sand pump. When removing the sediment from the sand basin equipment, the sand basin is emptied, the bottom of the basin is exposed, and relatively low-pressure water is blown out from the nozzle. Through a trough and collected in a sand collecting pit, from where it is discharged to the outside of a sand basin by a sand pump. This sand basin facility has the advantage that the power expenditure is low because the jet pressure from the nozzle is small.
【０００４】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沈砂池設
備が開示されている。この沈砂池設備の沈砂を除去する
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
の動作は公知例のものと同様である。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. A sand basin facility is disclosed in which a nozzle for ejecting pressure water in the flow direction of raw water is provided at the bottom of the sand basin. When removing the sedimentation of the sand basin equipment, the inflow of raw water is stopped, and after the water level falls to a predetermined level, pressure water is jetted out. Other operations are the same as those of the known example. .
【０００５】[0005]
【発明が解決しようとする課題】しかし前記した公知例
の沈砂池設備においては、ノズルからの噴出圧力が小
さいため沈砂池が汚水で満たされた状態では効率的に砂
を押し流すことが困難である。集砂の際には沈砂池の池
底が露出する程度まで沈砂池内の汚水を除去する必要が
あり、そのために多大な工数を要するという課題があ
る。また、沈砂池内の汚水を除去する際には汚水の流入
を停止させておく必要があるが、このような操作は雨水
沈砂池では可能であるものの、絶えず処理をしなければ
ならない汚水沈砂池では困難である。また、豪雨時には
大量の砂が池底に堆積するため砂を押し流すことが困難
である。However, in the above-described sand basin equipment of the known example, it is difficult to efficiently remove sand when the sand basin is filled with sewage because the jet pressure from the nozzle is small. . When collecting sand, it is necessary to remove sewage from the sand basin to the extent that the bottom of the sand basin is exposed. In addition, it is necessary to stop the inflow of sewage when removing sewage in the sand basin, but such an operation is possible in a rainwater basin, but in a sewage basin that must be constantly treated. Have difficulty. In addition, during heavy rainfall, a large amount of sand accumulates on the bottom of the pond, making it difficult to remove the sand.
【０００６】公知例の沈砂池設備においては、ノズル
からの噴出圧力の大きいジエットポンプを使用している
ため、これを作動させる動力が大きいという課題があ
る。本発明の目的は上記した課題を解決して、沈砂池が
汚水で満たされた状態で砂を押し流すことができる集砂
装置および集砂方法を提供することである。本発明の目
的は、池底に大量に堆積した砂を押し流すことのできる
集砂装置および集砂方法を提供することである。本発明
の目的は、使用される動力が小さい集砂装置および集砂
方法を提供することである。In the known sand basin equipment, since a jet pump having a large ejection pressure from a nozzle is used, there is a problem that a large power is required to operate the jet pump. An object of the present invention is to solve the above-mentioned problems and to provide a sand collecting device and a sand collecting method capable of flushing sand in a state where a sand basin is filled with sewage. An object of the present invention is to provide a sand collecting apparatus and a sand collecting method capable of flushing a large amount of sand deposited on a pond bottom. An object of the present invention is to provide a sand collecting device and a sand collecting method that use a small amount of power.
【０００７】[0007]
【課題を解決するための手段】本願発明者らは集砂ノズ
ルに供給する圧力水をより低圧水としても、ノズルの噴
出流を分散させずに沈砂に作用させることで搬送が可能
であることを見出した。すなわち、上記課題を解決する
ための第一の発明は、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
集砂ノズルを配置した集砂装置において、沈砂池の底面
に複数の凹凸条を集砂ピットに向けて設け、各凹条に前
記ノズルを配設し、前記ノズルに０．１MPaを超え０．
４MPa以下の圧力水を供給する集砂装置である。本発明
では、沈砂池への汚水の流入方向から順に集砂ピット、
集砂ノズルの順に配置し、更に下流側にポンプ井を設け
ることが好ましい。また、沈砂池への汚水の流入方向か
ら順にノズル、集砂ピット、集砂ノズル、ポンプ井を配
設してもよい。最下流側にあるポンプ井への砂の流入は
少ないのでポンプ井中の汚水を前記ノズルに供給するこ
とができる。Means for Solving the Problems The present inventors have found that even if the pressure water supplied to the sand collecting nozzle is lower pressure water, it can be conveyed by acting on the sand without dispersing the jet flow of the nozzle. Was found. That is, a first invention for solving the above-described problem is a sand collecting pit provided with a sand collecting pit at a predetermined position of a sand basin and a plurality of sand collecting nozzles arranged so as to jet water toward the sand collecting pit. In the apparatus, a plurality of uneven strips are provided on the bottom surface of the sand basin toward the sand collecting pit, and the nozzle is provided in each of the concave strips.
It is a sand collecting device that supplies pressure water of 4 MPa or less. In the present invention, in order from the inflow direction of the sewage into the sand basin, the sand collection pit,
It is preferable to arrange the sand collecting nozzles in this order and further provide a pump well on the downstream side. Further, a nozzle, a sand collecting pit, a sand collecting nozzle, and a pump well may be provided in order from the inflow direction of the sewage into the sand basin. Since the flow of sand into the pump well located on the most downstream side is small, sewage in the pump well can be supplied to the nozzle.
【０００８】前記集砂ノズルを複数のノズル群に分割し
て群単位で圧力水の供給を制御することで、ノズルへ圧
力水を供給するポンプの低容量化を図ることができる。By dividing the sand collecting nozzle into a plurality of nozzle groups and controlling the supply of pressurized water in units of a group, the capacity of a pump for supplying pressurized water to the nozzles can be reduced.
【０００９】第二の発明は、ノズルから圧力水を噴出し
て沈砂池の沈砂を沈砂池の所定位置に設けた集砂ピット
に移送する集砂方法であり、沈砂池の底面に複数の凹凸
条を集砂ピットに向けて設け、各凹条に前記ノズルを配
設し、前記ノズルに０．１MPaを超え０．４MPa以下の圧
力水を供給する集砂方法である。A second invention is a sand collecting method in which pressure water is ejected from a nozzle to transfer the sand of a sand basin to a sand collecting pit provided at a predetermined position of the sand basin. This is a sand collecting method in which a strip is provided toward the sand collecting pit, the nozzle is provided in each concave strip, and pressure water of more than 0.1 MPa and not more than 0.4 MPa is supplied to the nozzle.
【００１０】[0010]
【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は本発明の集砂装置に
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 related to the sand collecting apparatus 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.
【００１１】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。土手
１５はポンプ井８へ土砂が流入するのを抑制する。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, it 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 bank 15 suppresses earth and sand from flowing into the pump well 8. 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.
【００１２】図２は本発明の集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 collecting apparatus according to 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.
【００１３】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
水と砂とが凹条１１内の比較的狭い範囲に集中して存在
するから、砂に対して噴出水の運動エネルギーを有効に
作用させることができる。沈砂池底部の凹条と凸条はコ
ンクリート製トラフ、金属製トラフ及び樹脂製トラフの
何れをも使用できる。凹条１１内の砂はトラフに対して
滑り易いことが望ましい。この点では金属製トラフ及び
樹脂製トラフが優れている。またトラフは耐磨耗性が要
求されるが、この点ではコンクリート製トラフと金属製
トラフが優れている。これらを考慮すると金属製トラ
フ、特に耐蝕性の高いＳＵＳ３０４製のトラフの使用が
好ましい。By providing the ridge 12 and the ridge 11 and disposing the nozzle 5 at the bottom thereof, the water and the sand ejected from the nozzle 5 are concentrated in a relatively narrow range within the ridge 11. Therefore, the kinetic energy of the jet water can be effectively applied to the sand. Any of the concrete trough, metal trough and resin trough can be used for the concave and convex strips at the bottom of the settling basin. It is desirable that the sand in the concave stripe 11 is slippery with respect to the trough. In this respect, metal troughs and resin troughs are superior. Further, the trough is required to have abrasion resistance, and in this regard, the concrete trough and the metal trough are superior. Considering these, it is preferable to use a metal trough, particularly a SUS304 trough having high corrosion resistance.
【００１４】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。この方法は堆
積した砂の量が比較的少ない時に有効である。こうする
ことで、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。尚、ノズル６
の群数が任意であることは自明である。As shown in FIG. 4, nozzles 5
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 away to the part of the group B, and then, the pressure water is ejected from the nozzles 5 of the group B to remove the sand from the part of the group A. 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. This method is effective when the amount of deposited sand is relatively small. By doing so, the discharge amount of the pressure water pump 6 can be reduced to 1/3, and the required power can be reduced at this point. The nozzle 6
It is obvious that the number of groups is arbitrary.
【００１５】また、先ずＡ群のノズルから圧力水を噴出
して、その部分に堆積した砂を集砂ピット３へ移送し、
次にＢ群のノズル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群のノズルから圧力水を噴出して
集砂ピット３へ移送し、次にＣ群のノズルから圧力水を
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群のノズルから圧力水を噴出してＡ群の
部分まで押し流し、次にＡ群のノズルから圧力水を噴出
して集砂ピット３へ移送することもできる。この方法は
堆積した砂の量が比較的多い時に特に有効である。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。Further, first, pressure water is jetted out from the nozzles of the group A, and the sand deposited on that portion is transferred to the sand collecting pit 3.
Next, pressurized water is blown out from the nozzles of the group B to blow off the sand to the portion of the group A, and then the water is blown out from the nozzles of the group A and transferred to the sand collecting pit 3, and then from the nozzles of the group C. The pressurized water is blown out, and the sand deposited on that part is washed down to the part of the group B. Then, the pressure water is blown out from the nozzle of the group B to be washed out to the part of the group A. Water can be ejected and transferred to the sand collecting pit 3. This method is particularly effective when the amount of deposited sand is relatively large. or,
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.
【００１６】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。In the embodiment shown in FIG. 1, the sand collecting pit 3, the nozzle 5, and the pump well 8 are arranged so that the jet water from the nozzle 5 is directed in the opposite direction to the pump well 8, because of the jet water. This is to make it difficult for the sand to be washed away to flow into the pump well 8.
【００１７】図６は他の実施の形態を示す全体システム
図である。集砂ピット３の位置を集砂対象領域の端では
なく内部とすることで集砂ピットまでの砂の搬送距離を
短くすることができる。これは沈砂池が長い場合に適用
されるもので、例えば沈砂池１の中央部に集砂ピット３
が設けられ、これに向かって両側からノズル５が配置さ
れる。他の構成は図２，３，４，５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. By setting the position of the sand collection pit 3 not inside the sand collection target area but inside, the sand transport distance to the sand collection pit can be shortened. This is applied when the sand basin is long, for example, a sand collecting pit 3 in the center of the sand basin 1.
Are provided, and the nozzles 5 are arranged from both sides toward this. Other configurations are the same as those 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.
【００１８】（実施例１）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３ｍ３／ｍｉｎで、
揚程が０．１MPa，０．２MPa，０．４MPa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、堆積沈砂量１５０mmと
して、集砂及び揚砂作業を行った。その結果、揚程が
０．２MPa，０．４MPa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。好適に集砂可能な堆積沈砂量は約２３０mm以下であ
った。揚程が０．１MPa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０．４MP
a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その必要性はない。よっ
て圧力水ポンプ８としては、揚程が０．１MPaを超え
０．４MPa以下のポンプが好適である。(Embodiment 1) A sand basin 1 having the structure shown in FIG.
The discharge rate of the pressure water pump 6 is 3 m 3 / min.
Pumps with heads of 0.1MPa, 0.2MPa, 0.4MPa are used, and as the sand pump 4, the discharge rate is 3m 3 / min.
Using a submersible sand pump with a lift of 10 m,
The sewage water level was set to the normal water level, and the sedimentation and sedimentation operations were performed with the sedimentation and sedimentation amount set to 150 mm. As a result, in the sand collection work using pumps with lifts of 0.2 MPa and 0.4 MPa, the sand deposited on the bottom of the sand basin was substantially removed. The amount of sediment that can be suitably collected is about 230 mm or less. With a pump with a lift of 0.1 MPa, most of the deposited sand remained at the bottom and the sand collection was insufficient. 0.4MP
It is needless to say that sand can be collected even with a pump whose head exceeds a, but it is not necessary because power is wasted. Therefore, as the pressure water pump 8, a pump having a head of more than 0.1 MPa and not more than 0.4 MPa is suitable.
【００１９】（実施例２）沈砂池１の汚水の水位を通常
の水位より下げ、堆積沈砂がちょうど冠水する水位とし
た他は実施例１と同様にして集砂及び揚砂作業を行っ
た。その結果、揚程が０．１MPa，０．２MPa，０．４MP
a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。(Example 2) Sand collection and sand-lifting operations were performed in the same manner as in Example 1 except that the water level of the sewage in the sand basin 1 was lowered from the normal water level and the water level at which the sedimentation sediment was just submerged. As a result, the head is 0.1MPa, 0.2MPa, 0.4MPa
In the sand collection work using the pump in a, the sand deposited on the bottom of the sand basin was substantially removed.
【００２０】[0020]
【発明の効果】本発明は上記の構成としたから、沈砂池
が汚水で満たされた状態で砂を押し流すことができるの
で、雨水沈砂池と汚水沈砂池の何れにおても集砂が可能
である。また、池底に大量に堆積した砂を押し流すこと
ができる。更に、高圧ポンプを必要としないので使用さ
れる動力が小さい沈砂池設備および沈砂の排出方法を提
供することがきる。According to the present invention having the above-described structure, sand can be washed away in a sand basin filled with sewage, so that sand can be collected in both a rainwater basin and a sewage basin. It is. In addition, a large amount of sand deposited on the bottom of the pond can be washed away. Further, it is possible to provide a sand basin equipment and a method for discharging sand, which require less power since a high pressure pump is not required.
【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
───────────────────────────────────────────────────── フロントページの続き (72)発明者 板倉 弘 埼玉県熊谷市三ヶ尻5200番地日立金属株式 会社環境エンジニアリング事業部内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Itakura 5200 Mikajiri, Kumagaya-shi, Saitama Prefecture Environmental Engineering Division Hitachi Metals Co., Ltd.
Claims (6)
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
を配置した集砂装置において、沈砂池の底面に複数の凹
凸条を集砂ピットに向けて設け、各凹条に前記ノズルを
配設し、前記ノズルに０．１MPaを超え０．４MPa以下の
圧力水を供給することを特徴とする集砂装置。1. A sand collecting pit is provided at a predetermined position of a sand basin,
In a sand collecting apparatus in which a plurality of nozzles are arranged so as to eject water toward the sand collecting pit, a plurality of uneven strips are provided on the bottom of a sand basin toward the sand collecting pit, and the nozzle is arranged in each concave strip. A sand collecting apparatus for supplying pressure water of more than 0.1 MPa and not more than 0.4 MPa to the nozzle.
ピット、ノズル、ポンプ井を設ける請求項１記載の集砂
装置。2. The sand collecting device according to claim 1, wherein a sand collecting pit, a nozzle, and a pump well are provided in order from the inflow direction of the sewage into the settling basin.
ル、集砂ピット、ノズル、ポンプ井を設ける請求項１記
載の集砂装置。3. The sand collecting device according to claim 1, 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 sedimentation basin.
給する請求項２又は３記載の集砂装置。4. The sand collecting apparatus according to claim 2, wherein the sewage in the pump well is supplied to the nozzle.
ことを特徴とする請求項１乃至４の何れかに記載の集砂
装置。5. The sand collecting apparatus according to claim 1, wherein said nozzle is divided into a plurality of nozzle groups.
砂を沈砂池の所定位置に設けた集砂ピットに移送する集
砂方法であり、 沈砂池の底面に複数の凹凸条を集砂ピットに向けて設
け、各凹条に前記ノズルを配設し、前記ノズルに０．１
MPaを超え０．４MPa以下の圧力水を供給することを特徴
とする集砂方法。6. A sand collecting method in which pressure water is ejected from a nozzle to transfer sand from a sand basin to a sand collecting pit provided at a predetermined position in the sand basin. The nozzle is provided in each concave streak provided toward the pit.
A sand collection method characterized by supplying pressure water exceeding MPa and not more than 0.4 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000361501A JP2002159803A (en) | 2000-11-28 | 2000-11-28 | Sand gathering apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000361501A JP2002159803A (en) | 2000-11-28 | 2000-11-28 | Sand gathering apparatus and method |
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| Publication Number | Publication Date |
|---|---|
| JP2002159803A true JP2002159803A (en) | 2002-06-04 |
Family
ID=18832924
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000361501A Pending JP2002159803A (en) | 2000-11-28 | 2000-11-28 | Sand gathering apparatus and method |
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| Country | Link |
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| JP (1) | JP2002159803A (en) |
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|---|---|---|---|---|
| JP2002282609A (en) * | 2001-03-29 | 2002-10-02 | Hitachi Metals Ltd | Sand-collecting device of sedimentation basin |
| JP2004122042A (en) * | 2002-10-04 | 2004-04-22 | Hitachi Metals Ltd | Grit collecting/pumping apparatus |
| JP2005111383A (en) * | 2003-10-08 | 2005-04-28 | Nishihara Environment Technology Inc | Sand collecting tank |
| JP2005152689A (en) * | 2003-11-20 | 2005-06-16 | Hazama Kisetsu Kogyo Kk | Sludge recovery equipment |
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| JP2004122042A (en) * | 2002-10-04 | 2004-04-22 | Hitachi Metals Ltd | Grit collecting/pumping apparatus |
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| JP2005342568A (en) * | 2004-05-31 | 2005-12-15 | Maezawa Ind Inc | Precipitate removing apparatus |
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| JP2009240890A (en) * | 2008-03-31 | 2009-10-22 | Kubota Corp | Grit tank |
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| CN103961912A (en) * | 2014-05-21 | 2014-08-06 | 重庆大学 | Mechanical sand washer |
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