JP4220833B2 - Sediment supply device - Google Patents

Sediment supply device Download PDF

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Publication number
JP4220833B2
JP4220833B2 JP2003139900A JP2003139900A JP4220833B2 JP 4220833 B2 JP4220833 B2 JP 4220833B2 JP 2003139900 A JP2003139900 A JP 2003139900A JP 2003139900 A JP2003139900 A JP 2003139900A JP 4220833 B2 JP4220833 B2 JP 4220833B2
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residue
storage tank
water
partition member
supply device
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JP2004337790A (en
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寛 川北
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Maezawa Industries Inc
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Maezawa Industries Inc
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Description

【0001】
【発明の属する技術分野】
本発明は、下水処理場等において使用されるし渣供給装置に関する。
【0002】
【従来の技術】
下水に含まれる繊維物や空き缶、プラスチック成形品、コンクリート片等の夾雑物(以降、し渣という)の処理工程の一部として、図5に示すように、貯留槽51に水及びし渣を投入し、貯留槽51の内部に設置したし渣掻き揚げ機52によりし渣を除去する工程がある。
【0003】
貯留槽51には、給水口53から水(通常、下水の二次処理水が用いられる)が給水される。し渣は、例えば下水道から直接取り出された状態でコンベア54等により搬送されてし渣投入口55から貯留槽51に投入される。し渣掻き揚げ機52の下流側には越流堰56が形成されており、し渣は、給水口53側から越流堰56側へと向かう水流に沿って貯留槽51の内部を移動し、し渣掻き揚げ機52により槽外へと除去される。その後、し渣は例えばし渣破砕機57により破砕される。以上のようなし渣の処理方法については、例えば特許文献1にも開示されている。
【0004】
【特許文献1】
特開昭53−63756号公報(第2頁、第1図)
【0005】
【発明が解決しようとする課題】
以上のように、水を張った貯留槽51にし渣を一旦投入して、再度、し渣掻き揚げ機52にてし渣を取り出すという工程を設ける理由は、し渣を後工程のし渣破砕機57に定量的に供給することで、し渣破砕機57のオーバロードを防止することにある。すなわち、前記特許文献1にも記載されているように、し渣のうちで比重の軽いものは水面に浮き、比重が重く沈むものは水の浮力を受けて徐々に沈降することで、し渣全体が貯留槽51内に広く分散することとなり、もってし渣は、し渣掻き揚げ機52により一度に大量に掻き揚げられることなく定量的に後工程に供給されるものである。
【0006】
以上の従来技術によれば、ある程度のし渣の定量的な供給が可能となるが、し渣投入口55から貯留槽51に投入されるし渣は、下水道から直接取り出された状態として非定量的に投入されるため、例えば降雨時には瞬時的に大量のし渣が貯留槽51にそのまま投入される場合があり、前記従来技術ではこのような瞬時的な大量のし渣に対応しきれないおそれがある。具体的には、給水口53から越流堰56へと向かう緩やかな水流だけでは、投入されたし渣が下流側まで流れることなく槽底に堆積してしまい、前記したような十分なし渣の分散能力が期待できず、特にし渣同士がからまった状態で大きな塊として投入されたときにはその傾向が著しくなる。また、し渣掻き揚げ機52のスリット幅は小さいことから、し渣掻き揚げ機52はある程度、水流に対して抵抗として作用することとなるが、従来のように給水口53から越流堰56への一方向への水流である場合、し渣掻き揚げ機52の前面にぶつかった水流は逃げ場を失うかたちで局所的な渦を巻く傾向にある。このような局所的な渦が発生すると、この渦にし渣が巻き込まれ団子状に絡まってしまい、この状態でし渣を掻き揚げるとし渣掻き揚げ機52に大きな負荷がかかってしまうことになる。
【0007】
本発明は、以上のような問題を解決するために創作されたものであり、簡易な構造であって、定量供給性に優れたし渣供給装置を提供することを目的としている。
【0008】
【課題を解決するための手段】
本発明は前記課題を解決するために、水及びし渣が投入される貯留槽に設けられるし渣供給装置であって、し渣の投入口と越流堰との間に配設されるし渣掻き揚げ機と、前記し渣掻き揚げ機よりも上流側において、周りに水の循環路を形成するように設置される仕切り部材と、前記仕切り部材の上方及び下方に形成される一対の直線部と、この一対の直線部に連なる一対のコーナー部とからなる前記循環路と、前記循環路に沿って、前記越流堰寄りのコーナー部において上方から下方に向かう方向に流れる水の循環流を強制的に発生させる循環流発生手段と、を備え、前記循環流の一部に前記し渣掻き揚げ機を臨ませる構成とした。
【0009】
また、前記し渣掻き揚げ機は、前記一対のコーナー部の内の前記越流堰寄りのコーナー部に臨むように配設される構成とした。
【0010】
さらに、前記循環流発生手段は、前記仕切り部材の上面側及び前記貯留槽の底部に設けられ、圧力流体を噴出する複数のノズルを備える構成とした。
【0011】
【発明の実施の形態】
図1はし渣供給装置1を示す側面説明図、図2はし渣供給装置1の作用を示す側面説明図、図3はし渣供給装置1の外観斜視図である。貯留槽2の長手方向の一端側には給水口3が形成されるとともに、他端側には越流堰4が形成されている。給水口3から貯留槽2に給水する水としては、例えば下水の二次処理水が用いられる。
【0012】
貯留槽2の長手方向の前記一端側において、貯留槽2の上方には、コンベア5にて移送されてきたし渣を貯留槽2に落下投入するし渣投入口6が配設されている。し渣投入口6と前記越流堰4との間にはし渣掻き揚げ機7が介在し、図1等に示すように、貯留槽2の長手方向の前記他端側寄りに設置されている。
【0013】
し渣掻き揚げ機7としては、図3に示すように、多数のスリットを有したスクリーン7aを傾斜状に立設し、このスクリーン7aの前面側にレーキ7bを設けた公知構造のものが適用できる。スクリーン7aの前面に付着したし渣は、上昇するレーキ7bにより掻き揚げられ、図1に示すように、し渣掻き揚げ機7の上端側に近接配置したし渣破砕機8に投入される。
【0014】
本発明に係るし渣供給装置1は、し渣掻き揚げ機7と、し渣掻き揚げ機7よりも上流側(給水口3側)において、周りに水の循環路9を形成するように設置される仕切り部材10と、循環路9に沿って強制的に水の循環流を発生させる循環流発生手段11とを備えており、前記循環流の一部にし渣掻き揚げ機7が臨む構成となっている。
【0015】
仕切り部材10は、上下方向に関する貯留槽2の中ほどにおいて、図3にも示すように貯留槽2の側壁2a,2a間に水平状に掛け渡される板状部材として構成され、例えば鋼板等が適用される。仕切り部材10の長手方向(貯留槽2の長手方向と同じ)の寸法が大きい場合には、部材を分割して、これらを組み付けることで一体的な仕切り部材10とする。
【0016】
この仕切り部材10周りに形成される循環路9は、貯留槽2の長手方向に延びる上方及び下方の直線部9a,9bと、この直線部9a,9bに連なる一対のコーナー部9c,9dとから構成される。つまり、循環路9は側面視して貯留槽2の長手方向に延びるトラック状経路として形成される。コーナー部9cは貯留槽2の長手方向の前記一端側に位置し、コーナー部9dは他端側、つまりし渣掻き揚げ機7寄りに位置する。
【0017】
仕切り部材10の上面及び貯留槽2の底部には、圧力流体を噴出する複数のノズル12が取り付けられており、これらが前記循環流発生手段11を構成する。本実施形態では、貯留槽2の上流壁2bにもノズル12を取り付けている。噴出する圧力流体としては、例えば下水の二次処理水が用いられる。ここで、上流壁2bの下部は傾斜面2cが形成されており、傾斜面2cの下端は、貯留槽2の底部(前記直線部9bの上流側終端の近傍)に凹状に形成された砂利受け室13に臨んでいる。この砂利受け室13は、し渣の中でも砂利や石、コンクリート片等、特に比重の大きなし渣を捕捉するために形成され、室内の途中にはパンチングメタル等からなるフィルタ14が取り付けられている。大きな石やコンクリート片等はこのフィルタ14にて捕捉され、フィルタ14を通過した砂利等は排砂弁15の開閉操作により槽外へ排出される。
【0018】
ノズル12は、以上の傾斜面2cや砂利受け室13にも取り付けられている。ここで、各ノズル12に関して、鉛直状に形成された上流壁2bに取り付けられたノズル12には符号12Aを付し、仕切り部材10の上面に取り付けられたノズル12には符号12Bを、貯留槽2の底部に取り付けられたノズル12には符号12Cを、傾斜面2cに取り付けられたノズル12には符号12Dを、砂利受け室13に取り付けられたノズル12には符号12Eを付す。なお、各ノズル12に圧力流体を供給する配管については図では省略している。
【0019】
図1に示すように、側面視した状態において、ノズル12Aは上下2段として、また、貯留槽2の幅方向(図1における紙面手前−奥方向)に適宜間隔をおいて複数、並列状に配置されており、各噴出方向が略水平状となるように上流壁2bに取り付けられる。これにより、ノズル12Aは循環路9におけるコーナー部9cの上方寄りに臨む。
【0020】
ノズル12Bは、貯留槽2の長手方向に所定の間隔をもって複数列、図では2列として配置されている。図3に示すように、各列は貯留層2の幅方向に並列状に配された複数のノズル12Bとして構成される。ノズル12Bは、各噴出方向がし渣掻き揚げ機7側に向けて略水平状となるように仕切り部材10に取り付けられている。ノズル12Cは、図1に示すように、貯留槽2の長手方向に所定の間隔をもって複数列、図では4列として配置されている。この各列も貯留層2の幅方向に並列状に配された複数のノズル12Cとして構成され、各噴出方向がノズル12Bと反対側の向き、つまり上流壁2b側に向けて略水平状となるように貯留槽2の底部に取り付けられている。
【0021】
ノズル12D及びノズル12Eはそれぞれ単列として設けられており、コーナー部9cにおいて水の流れが下方から上方に向けてスムースに弧を描くように、各噴出方向を斜め状にして、それぞれ傾斜面2c及び砂利受け室13に取り付けられている。
【0022】
以上の構成からなるし渣供給装置1の作用について説明する。先ず、し渣掻き揚げ機7を作動させて、給水口3から水を給水し、貯留槽2を満水状態にする。満水状態となったら給水は停止する。そして、ノズル12A〜12Eから圧力水を噴出させる。この圧力水の噴出により、循環路9において図2に示すように時計回りの循環流が発生する。
【0023】
次いで、し渣投入口6からし渣を投入する。し渣は、前記循環流に乗って循環路9を移動し、その過程において例えば大きなし渣の塊は次第にほぐれていき(特に水流の勢いや方向が変わるコーナー部9c、9dにおいて、ほぐれの度合いが大きい)、十分に分散された状態となって循環路9を循環移動する。このようにほぐれたし渣が上方の直線部9aからコーナー部9dにさしかかると、水面上に浮遊するし渣を含む比較的比重の小さい一部のし渣は、コーナー部9dの外側に臨むし渣掻き揚げ機7により捕捉されて掻き揚げられ、比重の大きい沈降性の残りのし渣は、コーナー部9dの内側寄りの循環流に乗って下方の直線部9b側に移動する。
【0024】
但し、この直線部9b側に移動したし渣も、特に比重の大きい石等を除き、その後の循環流の攪拌作用やコーナー部9dにおける水流に対する乗り具合によって、いずれはし渣掻き揚げ機7に捕捉されるように構成することが重要である。このあたりのし渣の捕捉性能に関する調整については、循環流の速度、つまりノズル12の噴射圧力が大きな因子となるが、これと共に仕切り部材10の端部とし渣掻き揚げ機7との距離L1(図2)の設定も重要な因子となる。したがってこの距離L1は容易に調整可能となるように構成することが望ましく、この場合、し渣掻き揚げ機7側を移動させることは事実上困難であることから、例えば、仕切り部材10の端部において、別途の距離調整用の鋼板等を着脱自在に取り付ける構成とすれば、容易に距離L1を所望する値に設定できる。
【0025】
さて、し渣掻き揚げ機7のスクリーン7a(図3)を通過した水は越流堰4から排水される。その排水量は、各ノズル12A〜12Eからの噴出水量と投入したし渣の総和から、し渣掻き揚げ機7にて掻き揚げたし渣量を差し引いた量となる。また、循環路9を循環移動するし渣の内で、比重の大きい砂利や石等は砂利受け室13にて捕捉される。
【0026】
なお、本実施形態においては、試験の結果、全ノズル12A、全ノズル12B及び4列のノズル12Cの内で図1における右側の2列(し渣掻き揚げ機7寄りの2列)のノズル12Cについては、循環流の発生と比重の大きい砂利移動のため高圧噴射とし、砂利受け室13寄りとなる残り2列のノズル12Cについては砂利受け室13に効果的に砂利を落下捕捉させるべく低圧噴射とし、ノズル12D及びノズル12Eについても、砂利や石だけを残して残りのし渣だけを舞い上がらせるべく低圧噴射とすれば、し渣の循環と砂利等の捕捉が効果的に両立できることが判明した。
【0027】
以上のように、し渣掻き揚げ機7と、し渣掻き揚げ機7よりも上流側において、周りに水の循環路9を形成するように設置される仕切り部材10と、循環路9に沿って強制的に水の循環流を発生させる循環流発生手段11とを備え、前記循環流の一部にし渣掻き揚げ機7を臨ませる構成とすれば、大量のし渣が投入されても、その大部分は循環流(旋回流)により槽内を循環(旋回)し、その一部がし渣掻き揚げ機7に捕捉されることとなるので、し渣掻き揚げ機7には一度に大量のし渣が捕捉されることなく、十分にほぐれたし渣の一部が総じて定量的に捕捉されることとなる。また、水流は槽内を循環(旋回)するので局所的な渦が発生することもない。したがって、し渣掻き揚げ機7のオーバロードを防止でき、し渣破砕機8側には定量的にし渣が供給されることとなるので、し渣破砕機8のオーバロードも防止できる。
【0028】
また、仕切り部材10を水平状に配設して、循環路9を、仕切り部材10の上方及び下方に形成される一対の直線部9a,9bと、この一対の直線部9a,9bに連なる一対のコーナー部9c、9dとを有するように形成し、し渣掻き揚げ機7を越流堰寄りのコーナー部9dに臨むように配設し、循環流を、コーナー部9dにおいて上方から下方に向かう流れとすることで、簡易な構造のし渣供給装置1が実現され、且つ、コーナー部9dを旋回中のし渣の内で外側寄りを旋回するし渣のみをし渣掻き揚げ機7にて捕捉できるので、し渣の定量供給性能がより優れることとなる。
【0029】
さらに、循環流発生手段11として、少なくとも仕切り部材10の上面側及び貯留槽2の底部に、圧力流体を噴出する複数のノズル12を備える構成とすることにより、簡易な構造が実現され、循環流の速度もノズル12の噴射圧力を調整することで容易に変更できる。
【0030】
以上、本発明について好適な実施形態を説明したが、本発明は以上に説明した形態に限られないのは勿論である。例えば、本発明の主な構成である「し渣掻き揚げ機7と、し渣掻き揚げ機7よりも上流側において、周りに水の循環路9を形成するように設置される仕切り部材10と、循環路9に沿って強制的に水の循環流を発生させる循環流発生手段11とを備え、前記循環流の一部にし渣掻き揚げ機7を臨ませる構成」については、様々な変形例が考えられる。
【0031】
図4は当該構成に関する変形例を示す説明図であり、貯留槽2を平面視した図である。本変形例は、仕切り部材10を貯留槽2に立設させることにより、循環流をこの仕切り部材10周りに、平面視して貯留槽2の長手方向に延びるトラック状経路として形成した場合を示す。し渣掻き揚げ機7は循環路9の下流側のコーナー部に臨んでいる。図では循環流発生手段11は図示していないが、例えば前記したノズル12を貯留槽2の底部等に取り付けることで容易に達成できる。このような態様としても、大きな塊状のし渣は循環流によって次第にほぐされ、コーナー部において、ほぐされた一部のし渣はし渣掻き揚げ機7によって捕捉され、残りのし渣は循環流に乗って引き続き循環することから、し渣破砕機8側への定量的なし渣の供給が可能となる。
【0032】
その他、本発明は、各構成要素に関するレイアウトや形状、個数等について図面に記載したものに限定されることなく、その趣旨を逸脱しない範囲で適宜に設計変更が可能である。
【0033】
【発明の効果】
本発明によれば、し渣掻き揚げ機には一度に大量のし渣が捕捉されることなく、十分にほぐれたし渣の一部が総じて定量的に捕捉されるため、し渣掻き揚げ機のオーバロードが防止されるとともに、後工程のし渣破砕機のオーバロードも防止される。
【図面の簡単な説明】
【図1】し渣供給装置を示す側面説明図である。
【図2】し渣供給装置の作用を示す側面説明図である。
【図3】し渣供給装置の外観斜視図である。
【図4】本発明の変形例を示す説明図であり、貯留槽を平面視した図である。
【図5】従来のし渣の処理工程を示す側面説明図である。
【符号の説明】
1 し渣供給装置
2 貯留槽
3 給水口
4 越流堰
6 し渣投入口
7 し渣掻き揚げ機
8 し渣破砕機
9 循環路
9a,9b 直線部
9c、9d コーナー部
10 仕切り部材
11 循環流発生手段
12 ノズル
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a residue supply device used in a sewage treatment plant or the like.
[0002]
[Prior art]
As shown in FIG. 5, as shown in FIG. 5, water and residue are put into the storage tank 51 as a part of the processing process of the foreign matter contained in the sewage, empty cans, plastic molded products, concrete pieces, etc. (hereinafter referred to as residue). There is a step of removing the residue with a residue scraper 52 installed in the storage tank 51.
[0003]
Water is supplied to the storage tank 51 from a water supply port 53 (usually secondary treated water of sewage is used). For example, the residue is transported by the conveyor 54 or the like in a state where it is directly taken out from the sewer, and is introduced into the storage tank 51 from the residue input port 55. An overflow weir 56 is formed on the downstream side of the slag scraper 52, and the slag moves in the storage tank 51 along the water flow from the water supply port 53 side to the overflow dam 56 side. Then, the residue is removed from the tank by a screen scraper 52. Thereafter, the residue is crushed by, for example, a residue crusher 57. Such a residue processing method is also disclosed in Patent Document 1, for example.
[0004]
[Patent Document 1]
JP-A-53-63756 (2nd page, FIG. 1)
[0005]
[Problems to be solved by the invention]
As described above, the reason for providing a step of once putting the residue into the storage tank 51 filled with water and removing the residue again with the residue scraper 52 is to crush the residue in the subsequent step. By supplying quantitatively to the machine 57, overloading of the residue crusher 57 is prevented. That is, as described in the above-mentioned Patent Document 1, among the screen residues, those with a low specific gravity float on the surface of the water, and those with a high specific gravity sink in response to the buoyancy of water and gradually sink. The whole is widely dispersed in the storage tank 51, and the residue is quantitatively supplied to the subsequent process without being scraped in large quantities at once by the residue scraper 52.
[0006]
According to the above-described prior art, it is possible to quantitatively supply a certain amount of scum, but the slag that is introduced into the storage tank 51 from the slag inlet 55 is non-quantitatively taken as being directly taken out from the sewer. For example, when it rains, a large amount of residue may be instantaneously added to the storage tank 51 as it is. For example, the conventional technique may not be able to handle such an instantaneous large amount of residue. There is. Specifically, only a gentle water flow from the water supply port 53 to the overflow weir 56 causes the added slag to accumulate on the bottom of the tank without flowing to the downstream side. The dispersibility cannot be expected, and the tendency becomes remarkable especially when the scum is put in a large lump in a state where the residues are entangled. Further, since the slit width of the screen scraper 52 is small, the screen scraper 52 acts as a resistance against the water flow to some extent, but the overflow weir 56 from the water supply port 53 as in the prior art. In the case of the water flow in one direction, the water flow that hits the front surface of the residue rafting machine 52 tends to cause a local vortex in the form of losing the escape. When such a local vortex is generated, the residue is caught in the vortex and entangled in the shape of a dumpling. In this state, if the residue is raked up, a large load is applied to the residue rake.
[0007]
The present invention has been created to solve the above-described problems, and has an object to provide a residue supply device having a simple structure and excellent quantitative supply ability.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention is a residue supply device provided in a storage tank into which water and residue are introduced, and is disposed between the residue inlet and the overflow weir. A residue sweeper, a partition member installed so as to form a circulation path of water around the upstream side of the residue lifter, and a pair of straight lines formed above and below the partition member And a circulation flow of water that flows in a direction from the top to the bottom in the corner portion near the overflow weir along the circulation path, and the circulation path comprising the pair of corner portions connected to the pair of straight portions. And a circulating flow generating means for forcibly generating the screen, and the screen scraper is exposed to a part of the circulating flow.
[0009]
The front noted渣掻-out fried machine was configured to be disposed to face the corner portion of the weir closer of the pair of corner portions.
[0010]
Further, the circulating flow generating means includes a plurality of nozzles that are provided on an upper surface side of the partition member and a bottom portion of the storage tank and eject a pressure fluid.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a side explanatory view showing the residue supply device 1, FIG. 2 is a side explanatory view showing the operation of the residue supply device 1, and FIG. 3 is an external perspective view of the residue supply device 1. A water supply port 3 is formed on one end side in the longitudinal direction of the storage tank 2, and an overflow weir 4 is formed on the other end side. As the water supplied from the water supply port 3 to the storage tank 2, for example, secondary treated water of sewage is used.
[0012]
On the one end side in the longitudinal direction of the storage tank 2, a residue input port 6 is provided above the storage tank 2 to drop the residue transferred from the conveyor 5 into the storage tank 2. Between the slag inlet 6 and the overflow weir 4, a slag lifter 7 is interposed, and is installed near the other end in the longitudinal direction of the storage tank 2 as shown in FIG. Yes.
[0013]
As the screen scraper 7, as shown in FIG. 3, a screen having a known structure in which a screen 7a having a large number of slits is inclined and a rake 7b is provided on the front side of the screen 7a is applied. it can. The residue adhering to the front surface of the screen 7a is scraped up by the rising rake 7b, and is put into the residue crusher 8 disposed close to the upper end side of the residue scraper 7 as shown in FIG.
[0014]
The residue supply device 1 according to the present invention is installed so as to form a circulation path 9 of water around the residue scraper 7 and upstream of the residue scraper 7 (water supply port 3 side). A partition member 10 and a circulation flow generation means 11 for forcibly generating a circulation flow of water along the circulation path 9, and a structure in which the residue scraper 7 faces a part of the circulation flow. It has become.
[0015]
The partition member 10 is configured as a plate-like member that extends horizontally between the side walls 2a, 2a of the storage tank 2 as shown in FIG. 3 in the middle of the storage tank 2 in the vertical direction. Applied. When the dimension of the partition member 10 in the longitudinal direction (the same as the longitudinal direction of the storage tank 2) is large, the members are divided and assembled to form an integral partition member 10.
[0016]
The circulation path 9 formed around the partition member 10 includes upper and lower straight portions 9a and 9b extending in the longitudinal direction of the storage tank 2, and a pair of corner portions 9c and 9d connected to the straight portions 9a and 9b. Composed. That is, the circulation path 9 is formed as a track-shaped path extending in the longitudinal direction of the storage tank 2 in a side view. The corner portion 9c is located on the one end side in the longitudinal direction of the storage tank 2, and the corner portion 9d is located on the other end side, that is, closer to the residue scraping machine 7.
[0017]
A plurality of nozzles 12 for ejecting pressure fluid are attached to the upper surface of the partition member 10 and the bottom of the storage tank 2, and these constitute the circulation flow generating means 11. In the present embodiment, the nozzle 12 is also attached to the upstream wall 2 b of the storage tank 2. As the pressure fluid to be ejected, for example, secondary treated water of sewage is used. Here, the lower surface of the upstream wall 2b is formed with an inclined surface 2c, and the lower end of the inclined surface 2c is a gravel receiver formed in a concave shape at the bottom of the storage tank 2 (in the vicinity of the upstream end of the straight portion 9b). It faces the room 13. The gravel receiving chamber 13 is formed to capture gravel, stones, concrete pieces, etc., particularly heavy gravel residue, and a filter 14 made of punching metal or the like is attached in the middle of the room. . Large stones, concrete pieces, and the like are captured by the filter 14, and gravel that has passed through the filter 14 is discharged out of the tank by opening and closing the sand removal valve 15.
[0018]
The nozzle 12 is also attached to the inclined surface 2c and the gravel receiving chamber 13 described above. Here, with respect to each nozzle 12, the nozzle 12 attached to the upstream wall 2b formed in a vertical shape is denoted by reference numeral 12A, the nozzle 12 attached to the upper surface of the partition member 10 is denoted by reference numeral 12B, and the storage tank No. 12C is attached to the nozzle 12 attached to the bottom of No. 2, No. 12D is attached to the nozzle 12 attached to the inclined surface 2c, and No. 12E is attached to the nozzle 12 attached to the gravel receiving chamber 13. Note that piping for supplying a pressure fluid to each nozzle 12 is omitted in the figure.
[0019]
As shown in FIG. 1, in a side view, the nozzles 12 </ b> A have two upper and lower stages, and a plurality of nozzles 12 </ b> A are arranged in parallel at appropriate intervals in the width direction of the storage tank 2 (front side to the back side in FIG. 1). It arrange | positions and is attached to the upstream wall 2b so that each ejection direction may become substantially horizontal shape. Thereby, the nozzle 12A faces the upper side of the corner portion 9c in the circulation path 9.
[0020]
The nozzles 12 </ b> B are arranged in a plurality of rows with a predetermined interval in the longitudinal direction of the storage tank 2, and two rows in the figure. As shown in FIG. 3, each row is configured as a plurality of nozzles 12 </ b> B arranged in parallel in the width direction of the reservoir 2. The nozzle 12B is attached to the partition member 10 so that each ejection direction becomes substantially horizontal toward the residue lifter 7 side. As shown in FIG. 1, the nozzles 12 </ b> C are arranged in a plurality of rows with a predetermined interval in the longitudinal direction of the storage tank 2, and four rows in the figure. Each row is also configured as a plurality of nozzles 12C arranged in parallel in the width direction of the reservoir 2, and each ejection direction is substantially horizontal toward the direction opposite to the nozzle 12B, that is, toward the upstream wall 2b. In this way, it is attached to the bottom of the storage tank 2.
[0021]
The nozzle 12D and the nozzle 12E are each provided as a single row, and each jetting direction is slanted so that the flow of water smoothly forms an arc from the lower side to the upper side at the corner portion 9c, and the inclined surface 2c. And a gravel receiving chamber 13.
[0022]
The operation of the residue supply device 1 having the above configuration will be described. First, the residue scraping machine 7 is operated to supply water from the water supply port 3 to make the storage tank 2 full. Water supply stops when the water is full. And pressure water is ejected from nozzle 12A-12E. Due to the ejection of the pressure water, a clockwise circulation flow is generated in the circulation path 9 as shown in FIG.
[0023]
Next, the residue is introduced from the residue input port 6. Sediment travels along the circulation path 9 along the circulation flow, and in the process, for example, large lump of sediment is gradually loosened (particularly in the corner portions 9c and 9d where the momentum and direction of the water flow change) Is large) and circulates in the circulation path 9 in a sufficiently dispersed state. When the loosened residue reaches the corner portion 9d from the upper straight portion 9a, a portion of the residue that floats on the water surface and includes a relatively small specific gravity faces the outside of the corner portion 9d. The remaining sediment with a large specific gravity that is trapped and scraped by the residue scraping machine 7 rides on the circulating flow closer to the inside of the corner portion 9d and moves to the lower linear portion 9b side.
[0024]
However, the residue moved to the straight line portion 9b side is also changed to the residue lifter 7 depending on the subsequent stirring action of the circulating flow and the riding condition against the water flow in the corner portion 9d, except for stones with particularly high specific gravity. It is important to configure it to be captured. Regarding the adjustment related to the trapping performance of the residue, the speed of the circulating flow, that is, the injection pressure of the nozzle 12 is a large factor, but together with this, the distance L1 between the end of the partition member 10 and the residue lifter 7 ( The setting in Fig. 2) is also an important factor. Therefore, it is desirable that the distance L1 be easily adjustable. In this case, since it is practically difficult to move the residue scraper 7 side, for example, the end portion of the partition member 10 is used. In this case, the distance L1 can be easily set to a desired value if a separate distance adjusting steel plate or the like is detachably attached.
[0025]
Now, the water that has passed through the screen 7a (FIG. 3) of the screen scraper 7 is drained from the overflow weir 4. The amount of drainage is the amount obtained by subtracting the amount of residue squeezed by the residue scraper 7 from the amount of water ejected from each nozzle 12A to 12E and the total amount of residue added. Further, gravel, stones, etc. having a large specific gravity are caught in the gravel receiving chamber 13 within the residue that circulates in the circulation path 9.
[0026]
In the present embodiment, as a result of the test, among the nozzles 12A, the nozzles 12B, and the four rows of nozzles 12C, the right two rows in FIG. 1 (two rows closer to the screen scraper 7) 12C. For high-pressure injection, the circulation flow is generated and gravel moves with a large specific gravity, and the remaining two rows of nozzles 12C near the gravel receiving chamber 13 are low-pressure injected so that the gravel receiving chamber 13 can effectively drop and capture gravel. As for the nozzle 12D and the nozzle 12E, it is found that if the low pressure injection is performed so that only the gravel and stone are left and only the remaining residue is raised, the circulation of the residue and the capture of the gravel can be effectively achieved. .
[0027]
As described above, the residue lifter 7, the partition member 10 installed so as to form the water circulation path 9 around the upstream side of the residue lifter 7, and the circulation path 9 And a circulation flow generating means 11 for forcibly generating a circulation flow of water, and if the residue scraper 7 is allowed to face a part of the circulation flow, even if a large amount of residue is introduced, Most of it circulates (swirls) in the tank by a circulating flow (swirl flow), and a part of it is trapped by the residue scraping machine 7. A part of the sufficiently loosened residue is captured quantitatively without being captured. Further, since the water flow circulates (turns) in the tank, no local vortex is generated. Accordingly, overloading of the screen scraper 7 can be prevented, and the screen residue is supplied quantitatively to the screen crusher 8 side, so that overload of the screen crusher 8 can also be prevented.
[0028]
Further, the partition member 10 is horizontally disposed, and the circulation path 9 is connected to the pair of straight portions 9a and 9b formed above and below the partition member 10 and the pair of straight portions 9a and 9b. Are formed so as to face the corner portion 9d near the overflow weir, and the circulating flow is directed downward from above in the corner portion 9d. By making the flow, the residue supply device 1 having a simple structure is realized, and the corner 9d is swung around the outside of the residue being swiveled around the corner 9d, and only the residue is removed, and the residue lifter 7 is used. Since it can be captured, the quantitative supply performance of the residue will be more excellent.
[0029]
Furthermore, a simple structure is realized by providing the circulating flow generating means 11 with a plurality of nozzles 12 that eject pressure fluid at least on the upper surface side of the partition member 10 and the bottom of the storage tank 2. This speed can also be easily changed by adjusting the injection pressure of the nozzle 12.
[0030]
As mentioned above, although preferred embodiment was described about this invention, of course, this invention is not restricted to the form demonstrated above. For example, the main components of the present invention are “the screen scraper 7, and the partition member 10 installed so as to form a water circulation path 9 around the upstream side of the screen scraper 7. Various configurations are provided for “a configuration including a circulation flow generation means 11 for forcibly generating a circulation flow of water along the circulation path 9 and allowing the residue scooping machine 7 to face a part of the circulation flow”. Can be considered.
[0031]
FIG. 4 is an explanatory diagram showing a modified example related to the configuration, and is a diagram in which the storage tank 2 is viewed in plan. This modification shows the case where the partition member 10 is erected in the storage tank 2 to form a circulation flow around the partition member 10 as a track-like path extending in the longitudinal direction of the storage tank 2 in plan view. . The screen scraper 7 faces a corner portion on the downstream side of the circulation path 9. Although the circulating flow generation means 11 is not shown in the drawing, it can be easily achieved by attaching the nozzle 12 to the bottom of the storage tank 2 or the like, for example. Even in such an embodiment, the large lump residue is gradually loosened by the circulation flow, and at the corner part, the loosened partial residue is captured by the residue scraping machine 7 and the remaining residue is circulated. Since it continues to circulate on the slag, it becomes possible to quantitatively supply the residue to the residue crusher 8 side.
[0032]
In addition, the present invention is not limited to the layout, shape, number, and the like related to each component, and can be appropriately modified without departing from the spirit thereof.
[0033]
【The invention's effect】
According to the present invention, since a large amount of residue is not captured at a time, and a part of the sufficiently loosened residue is captured quantitatively as a whole. Overloading of the residue crusher in the subsequent process is also prevented.
[Brief description of the drawings]
FIG. 1 is an explanatory side view showing a residue supply device.
FIG. 2 is an explanatory side view showing the operation of the residue supply device.
FIG. 3 is an external perspective view of a residue supply device.
FIG. 4 is an explanatory view showing a modified example of the present invention, and is a view in plan view of a storage tank.
FIG. 5 is an explanatory side view showing a conventional residue processing process.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Screen residue supply apparatus 2 Storage tank 3 Water supply port 4 Overflow weir 6 Screen residue input port 7 Screen scraper 8 Screen residue crusher 9 Circulation path 9a, 9b Straight line part 9c, 9d Corner part 10 Partition member 11 Circulation flow Generating means 12 Nozzle

Claims (3)

水及びし渣が投入される貯留槽に設けられるし渣供給装置であって、
し渣の投入口と越流堰との間に配設されるし渣掻き揚げ機と、
前記し渣掻き揚げ機よりも上流側において、周りに水の循環路を形成するように設置される仕切り部材と、
前記仕切り部材の上方及び下方に形成される一対の直線部と、この一対の直線部に連なる一対のコーナー部とからなる前記循環路と、
前記循環路に沿って、前記越流堰寄りのコーナー部において上方から下方に向かう方向に流れる水の循環流を強制的に発生させる循環流発生手段と、
を備え、前記循環流の一部に前記し渣掻き揚げ機を臨ませる構成としたことを特徴とするし渣供給装置。
A residue supply device provided in a storage tank into which water and residue are charged,
A screen scraper disposed between the screen port and the overflow weir;
A partition member installed on the upstream side of the scum raking machine so as to form a circulation path of water around;
The circulation path including a pair of straight portions formed above and below the partition member, and a pair of corner portions connected to the pair of straight portions;
A circulating flow generating means for forcibly generating a circulating flow of water flowing in a direction from the upper side to the lower side in the corner portion near the overflow weir along the circulation path;
And a residue supply device characterized in that the residue lifter is exposed to a part of the circulating flow.
記し渣掻き揚げ機は、前記一対のコーナー部の内の前記越流堰寄りのコーナー部に臨むように配設されことを特徴とする請求項1に記載のし渣供給装置。 Before describing渣掻-out fried machine, according bookmarks residue feeder to claim 1, wherein the Ru is disposed so as to face the corner portion of the weir closer of the pair of corner portions. 前記循環流発生手段は、前記仕切り部材の上面側及び前記貯留槽の底部に設けられ、圧力流体を噴出する複数のノズルを備えた構成からなることを特徴とする請求項1または請求項2に記載のし渣供給装置。The circulation flow generating means is provided at the bottom of the upper surface and the storage tank of the partition member, to claim 1 or claim 2, characterized in that it consists of construction having a plurality of nozzles for ejecting a pressure fluid The described residue supply device.
JP2003139900A 2003-05-19 2003-05-19 Sediment supply device Expired - Fee Related JP4220833B2 (en)

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5373472A (en) * 1976-12-09 1978-06-29 Hitachi Kiden Kogyo Kk Method and apparatus for treating sewageescreened sludge
JPH0427449A (en) * 1990-05-22 1992-01-30 Ishikawajima Harima Heavy Ind Co Ltd Filthy sand washing equipment in sewerage treatment facility
JPH0513541U (en) * 1991-07-31 1993-02-23 株式会社丸島アクアシステム Cleaning equipment for sedimentation and residue
JP3396684B2 (en) * 1994-10-17 2003-04-14 東 利保 Cleaning treatment method and apparatus
JP2001286895A (en) * 2000-04-04 2001-10-16 Hitachi Kiden Kogyo Ltd Dedusting device
JP4502531B2 (en) * 2001-02-23 2010-07-14 旭テック環境ソリューション株式会社 Sedimentation and residue processing equipment

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