JPH0833900A - Sludge digestion tank - Google Patents
Sludge digestion tankInfo
- Publication number
- JPH0833900A JPH0833900A JP6174269A JP17426994A JPH0833900A JP H0833900 A JPH0833900 A JP H0833900A JP 6174269 A JP6174269 A JP 6174269A JP 17426994 A JP17426994 A JP 17426994A JP H0833900 A JPH0833900 A JP H0833900A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- sludge
- branch pipe
- pipe
- draft tube
- 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.)
- Granted
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ドラフトチューブを備
えた汚泥消化槽に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge digestion tank equipped with a draft tube.
【０００２】[0002]
【従来の技術】下水汚泥等の有機性汚泥を嫌気性醗酵さ
せる消化槽としては、槽本体が偏平で、その縦断面がソ
ロバン玉状をなすもの（一般に、ソロバン玉型と称され
るもの）や、槽本体が縦長で、その縦断面が卵状のもの
（一般に、卵型と称されるもの）等がある。2. Description of the Related Art As a digestion tank for anaerobic fermentation of organic sludge such as sewage sludge, the main body of the digestion tank is flat, and its longitudinal section is abacus bead-shaped (generally called abacus bead type). Alternatively, the tank main body is vertically long, and the vertical cross section thereof has an oval shape (generally called an egg type).
【０００３】図４はソロバン玉型消化槽の概略を示す図
である。汚泥の醗酵処理中には、処理中の消化汚泥と新
たに供給された被処理汚泥（生汚泥）をよく混合する必
要があるので、この図４のソロバン玉型消化槽において
は、汚泥中にガスを吹き込んで槽内に上下の循環流を形
成させ、これによって汚泥を攪拌するようになってい
る。図中、１は槽本体、５０はガス吹き込み管、５１は
発生した消化ガスを吸引しガス吹き込み管へ送り込むブ
ロワーである。６０は汚泥、６１は汚泥の液面を示す。FIG. 4 is a diagram showing an outline of an abacus ball type digestion tank. During the fermentation treatment of sludge, it is necessary to mix well the digested sludge being treated and the newly-supplied sludge to be treated (raw sludge). The gas is blown into the tank to form an upper and lower circulation flow, which agitates the sludge. In the figure, 1 is a tank body, 50 is a gas blowing pipe, and 51 is a blower that sucks the generated digested gas and sends it to the gas blowing pipe. Reference numeral 60 represents sludge, and 61 represents the liquid level of sludge.
【０００４】又、図５は卵型消化槽の概略を示す図であ
る。この型の消化槽においては、汚泥を攪拌するため
に、上方の汚泥を吸引して下方に向けて吐出させるスク
リュー式攪拌機２が槽本体１の上部に備えられ、この攪
拌機２に連結させてドラフトチューブ４０が垂設されて
いる。図中、４は攪拌機のスクリュー、５はスクリュー
のケーシング、６はモータである。６０は汚泥、６１は
汚泥の液面を示す。FIG. 5 is a schematic view of an egg-type digester tank. In this type of digestion tank, in order to agitate the sludge, a screw-type agitator 2 for sucking the upper sludge and discharging it downward is provided at the upper part of the tank main body 1, and is connected to the agitator 2 for drafting. The tube 40 is vertically installed. In the figure, 4 is a screw of a stirrer, 5 is a casing of a screw, and 6 is a motor. Reference numeral 60 represents sludge, and 61 represents the liquid level of sludge.
【０００５】上記卵型消化槽を攪拌する際には、攪拌機
２を駆動させ、槽上部の汚泥を吸引してドラフトチュー
ブ４０内へ押し込み、この汚泥をドラフトチューブ下端
の吐出口から槽底に向かって吐出させる。ドラフトチュ
ーブ４０から吐出した汚泥は槽底部で反転し上昇して槽
上部に戻り、再び攪拌機２によって吸引される。このよ
うにして、槽内に上下の循環流が形成され、汚泥の攪拌
が行われる。When stirring the egg-type digestion tank, the agitator 2 is driven to suck the sludge at the top of the tank and push it into the draft tube 40, and the sludge is directed from the discharge port at the lower end of the draft tube to the bottom of the tank. To eject. The sludge discharged from the draft tube 40 is inverted at the bottom of the tank, rises, returns to the upper part of the tank, and is again sucked by the agitator 2. In this way, the upper and lower circulation flows are formed in the tank, and the sludge is stirred.
【０００６】[0006]
【発明が解決しようとする課題】上記ソロバン玉型消化
槽においては、底に砂が堆積し易い。又、汚泥を攪拌し
ても、汚泥の液面が広いので、液面上に生成したスカム
（汚泥が固化したもの）が破砕されにくく、汚泥中に混
入しない。そして、このスカムが次第に蓄積すると言う
欠点を有している。このため、ソロバン玉型消化槽を使
用した場合、長期に渡る連続操業が困難であると言う問
題が起こる。更に、ソロバン玉型消化槽においては、攪
拌がガス吹き込み方式であるので、ガス吹き込みに要す
る所要動力が大きいと言う欠点もある。DISCLOSURE OF THE INVENTION In the above abacus ball-type digestion tank, sand easily accumulates on the bottom. Further, even if the sludge is stirred, since the liquid surface of the sludge is wide, the scum (solidified sludge) generated on the liquid surface is hard to be crushed and does not mix into the sludge. Then, there is a drawback that the scum gradually accumulates. Therefore, when the abacus ball-type digestion tank is used, there is a problem that continuous operation for a long period of time is difficult. Further, in the abacus ball type digestion tank, since the stirring is a gas blowing method, there is also a drawback that the power required for gas blowing is large.
【０００７】一方、卵型消化槽においては、汚泥の循環
流は緩やかであるが、汚泥が流動しないデットスペース
ができることなく、槽内全体がよく攪拌され、又、液面
上に生成したスカムが比較的容易に破砕されて汚泥中に
混入すると言う利点がある。更に、汚泥の攪拌が機械攪
拌方式であるので、所要動力が小さいと言う利点をも有
している。On the other hand, in the egg-type digestion tank, the circulation flow of sludge is gentle, but there is no dead space where sludge does not flow, the whole tank is well stirred, and scum generated on the liquid surface is It has the advantage of being crushed relatively easily and mixed in sludge. Further, since the sludge is mechanically stirred, it has an advantage that the required power is small.
【０００８】しかし、上記のような利点を有する卵型消
化槽の攪拌方式をソロバン玉型消化槽に適用しても、上
述のような効果を得ることはできない。すなわち、ソロ
バン玉型消化槽にドラフトチューブを設置した場合、ソ
ロバン玉型消化槽は偏平であって、液面が形成される面
積が広いので、攪拌機に吸引される汚泥は攪拌機周辺の
ものだけに限られてしまい、槽の外周部に無攪拌状態の
デットスペースができる。このため、汚泥の攪拌が不十
分になって、槽底に砂が堆積したり、又、攪拌機に吸引
される汚泥は攪拌機周辺のものだけであるので、攪拌に
よって破砕されるスカムは攪拌機周辺のものだけにな
る。However, even if the stirring system of the egg-type digestion tank having the above advantages is applied to the abacus ball-type digestion tank, the above effects cannot be obtained. In other words, when a draft tube is installed in the abacus jade digester, the abacus jade digester is flat and the surface area is large, so the sludge aspirated by the agitator is only around the agitator. It is limited, and there is a dead space in the outer periphery of the tank without stirring. For this reason, the sludge is not sufficiently stirred, and sand accumulates on the bottom of the tank, and the sludge that is sucked into the stirrer is only around the stirrer. Only things.
【０００９】上述のように、現状のソロバン玉型消化槽
においては、デットスペースができて、槽底部に砂が堆
積したり、又、液面上に生成したスカムが破砕されずに
蓄積し、連続操業が困難であると言う問題は依然として
解決されていない。As described above, in the current abacus ball-type digestion tank, there is a dead space, sand accumulates on the bottom of the tank, and scum generated on the liquid surface accumulates without being crushed, The problem that continuous operation is difficult is still unsolved.
【００１０】本発明は、槽本体の形状がソロバン玉型の
ような偏平な形状のものであっても、槽内を良好な攪拌
状態にすることができる汚泥消化槽を提供することを目
的とする。It is an object of the present invention to provide a sludge digestion tank which can maintain a good stirring state in the tank even if the tank body has a flat shape such as an abacus ball shape. To do.
【００１１】[0011]
【課題を解決するための手段】本発明は、槽本体の上部
に汚泥を流動させるための攪拌機が垂設され、この攪拌
機に連結され、攪拌機から送られてきた汚泥を槽本体内
に吐出させ汚泥の循環流を形成させるドラフトチューブ
が備えられた汚泥消化槽において、ドラフトチューブ
が、垂設された本管とこの本管から水平方向に分岐され
た分岐管よりなり、分岐管の吐出口が上向きに形成され
ていることを特徴としている。又、上記ドラフトチュー
ブの分岐管の吐出口が横向きに形成されていることも特
徴としている。According to the present invention, a stirrer for flowing sludge is vertically provided on the upper part of a tank main body and is connected to this stirrer to discharge sludge sent from the stirrer into the tank main body. In a sludge digestion tank equipped with a draft tube that forms a circulation flow of sludge, the draft tube consists of a vertically suspended main pipe and a branch pipe horizontally branched from this main pipe, and the outlet of the branch pipe is The feature is that it is formed upward. Further, it is also characterized in that the discharge port of the branch pipe of the draft tube is formed laterally.
【００１２】[0012]
【作用】本発明においては、ドラフトチューブに、水平
方向に分岐された分岐管が設けられており、槽本体の上
部から本管に吸引された汚泥の一部が槽の周辺へ吐出す
るようになっているので、槽の周辺から中心部へ戻る循
環流が形成され、汚泥の攪拌が槽内全体に渡って行われ
る。このため、槽内にデットスペースができなくなる。In the present invention, the draft tube is provided with the branch pipe which is branched in the horizontal direction so that a part of the sludge sucked into the main pipe from the upper part of the tank main body is discharged to the periphery of the tank. Therefore, a circulation flow returning from the periphery of the tank to the center is formed, and sludge is agitated throughout the tank. Therefore, no dead space can be created in the tank.
【００１３】そして、上記分岐管の吐出口が上向きに形
成されていると、槽周辺に強力な上昇流が発生し、汚泥
の攪拌が良好になると共にスカムの破砕が促進される。
又、上記分岐管の吐出口が横向きに形成されていると、
汚泥が槽の内壁に向かって吐出されるので、その内壁部
の汚泥が激しく攪拌され、内壁面が清浄の状態に維持さ
れる。特に、上記分岐管が槽下部に配置されていると、
砂などの堆積物の蓄積が防止される。When the outlet of the branch pipe is formed upward, a strong upward flow is generated around the tank, which improves sludge agitation and promotes scum crushing.
If the discharge port of the branch pipe is formed laterally,
Since the sludge is discharged toward the inner wall of the tank, the sludge on the inner wall portion is vigorously stirred and the inner wall surface is maintained in a clean state. In particular, when the branch pipe is arranged at the bottom of the tank,
Accumulation of sediment such as sand is prevented.
【００１４】[0014]
【実施例】図１は本発明の一実施例を示す概略の縦断面
図である。この消化槽は槽本体１がソロバン玉型であっ
て、槽本体１中心の上部にスクリュー式攪拌機２が備え
られ、この攪拌機２にドラフトチューブ３が連結されて
いる。図中、４は攪拌機のスクリュー、５はスクリュー
のケーシング、６はモータ、４１はドラフトチューブの
支持脚であり、６０は汚泥、６１は汚泥の液面を示す。
又、白抜きの矢印は汚泥の流れ方向を示す。1 is a schematic vertical sectional view showing an embodiment of the present invention. In this digestion tank, the tank main body 1 is an abacus ball type, and a screw-type stirrer 2 is provided in the upper part of the center of the tank main body 1, and the draft tube 3 is connected to the stirrer 2. In the figure, 4 is a screw of an agitator, 5 is a casing of a screw, 6 is a motor, 41 is a support leg of a draft tube, 60 is sludge, and 61 is the liquid level of sludge.
The white arrow indicates the direction of sludge flow.
【００１５】上記ドラフトチューブ３は、本管１０と、
この本管１０の上部から水平方向に分岐された上部分岐
管１１よりなっている。そして、上部分岐管１１は本管
１０を中心にして複数本が放射状に取り付けられ、その
吐出口２１は上向きに設けられている。The draft tube 3 includes a main tube 10 and
An upper branch pipe 11 is horizontally branched from the upper portion of the main pipe 10. A plurality of the upper branch pipes 11 are radially attached around the main pipe 10, and the discharge ports 21 thereof are provided upward.
【００１６】上記の構成による消化槽において、攪拌機
２を駆動させると、槽本体上部の汚泥が吸引されてドラ
フトチューブの本管１０内へ押し込まれる。本管１０内
へ押し込まれた汚泥のうち、その多くは本管下端の吐出
口２０から槽底に向かって吐出するが、一部は上部分岐
管の吐出口２１からも吐出する。そして、本管の吐出口
２０から吐出した汚泥は槽底部で反転し上昇して槽本体
上部に戻り、再び攪拌機２に吸引される。一方、上部分
岐管の吐出口２１から吐出した汚泥はそのまま外周部の
液面６１に向かって上昇した後、中心に向かって流れ、
攪拌機２に吸引される。このようにして、槽本体１内に
は、槽底から槽上部に及ぶ上下の循環流が形成されると
共に、槽上部には、上記上下の循環流とは別に、外周か
ら中心部に至る循環流が形成され、槽内全体が良好な攪
拌状態になる。そして、液面上に生成するスカムも汚泥
と共に攪拌機に吸引され、破砕されて汚泥中に混入す
る。When the stirrer 2 is driven in the digestion tank having the above structure, the sludge on the upper part of the tank main body is sucked and pushed into the main pipe 10 of the draft tube. Most of the sludge pushed into the main pipe 10 is discharged from the discharge port 20 at the lower end of the main pipe toward the tank bottom, but a part of the sludge is also discharged from the discharge port 21 of the upper branch pipe. Then, the sludge discharged from the discharge port 20 of the main pipe is inverted at the bottom of the tank, rises, returns to the upper part of the tank main body, and is again sucked by the agitator 2. On the other hand, the sludge discharged from the discharge port 21 of the upper branch pipe rises as it is toward the liquid surface 61 of the outer peripheral portion and then flows toward the center,
It is sucked into the stirrer 2. In this way, the upper and lower circulation flows extending from the bottom to the upper part of the tank are formed in the tank body 1, and the circulation from the outer circumference to the central part is separated from the upper and lower circulation flows in the upper part of the tank. A flow is formed, and the inside of the tank is in a good stirring state. Then, the scum generated on the liquid surface is also sucked by the agitator together with the sludge, crushed and mixed into the sludge.
【００１７】図２は本発明の他の実施例を示す概略の縦
断面図である。図２において、図１と同じ構成部分につ
いては同一の符号を付し、説明を省略する。本実施例に
おけるドラフトチューブ３は、本管１０と、この本管１
０の下部から水平方向に分岐された下部分岐管１２より
なっている。そして、下部分岐管１２は本管１０を中心
にして複数本が放射状に取り付けられ、その吐出口２２
は水平方向に設けられている。なお、下部分岐管１２の
取付け位置は、槽本体１の底と側壁の境界付近に位置す
る高さにするのがよい。FIG. 2 is a schematic vertical sectional view showing another embodiment of the present invention. 2, the same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The draft tube 3 in this embodiment includes a main tube 10 and the main tube 1.
It consists of a lower branch pipe 12 which is horizontally branched from the lower part of 0. Then, a plurality of lower branch pipes 12 are radially attached around the main pipe 10, and the discharge ports 22 thereof are provided.
Are installed horizontally. The lower branch pipe 12 is preferably mounted at a height near the boundary between the bottom and the side wall of the tank body 1.
【００１８】図２の構成による消化槽において、攪拌機
２を駆動させると、槽本体上部の汚泥が吸引されてドラ
フトチューブの本管１０内へ押し込まれる。本管１０内
へ押し込まれた汚泥のうち、その多くは本管下端の吐出
口２０から槽底に向かって吐出するが、一部は下部分岐
管の吐出口２２からも吐出する。そして、本管の吐出口
２０から吐出した汚泥は槽底部で反転し上昇して槽本体
上部に戻り、再び攪拌機２に吸引される。一方、下部分
岐管の吐出口２２から吐出した汚泥は槽本体１の底と側
壁の境界付近に当たって２方向に分流され、その一つの
流れは底面に沿って下方向に向かい、他の流れは側壁に
沿って上昇する。このように、下部分岐管１２を設ける
ことによって、外周部から液面に向かう汚泥の循環流が
形成されると共に、底面に沿って流れる汚泥の循環流も
形成されるので、底面に砂などの堆積が起こらなくな
る。When the stirrer 2 is driven in the digestion tank having the structure shown in FIG. 2, the sludge on the upper part of the tank main body is sucked and pushed into the main pipe 10 of the draft tube. Most of the sludge pushed into the main pipe 10 is discharged from the discharge port 20 at the lower end of the main pipe toward the tank bottom, but a part of the sludge is also discharged from the discharge port 22 of the lower branch pipe. Then, the sludge discharged from the discharge port 20 of the main pipe is inverted at the bottom of the tank, rises, returns to the upper part of the tank main body, and is again sucked by the agitator 2. On the other hand, sludge discharged from the discharge port 22 of the lower branch pipe is divided into two directions by hitting the vicinity of the boundary between the bottom and the side wall of the tank main body 1, one of which flows downward along the bottom surface, and the other flow flows toward the side wall. Rises along. As described above, by providing the lower branch pipe 12, a circulation flow of sludge from the outer peripheral portion toward the liquid surface is formed, and a circulation flow of sludge flowing along the bottom surface is also formed. Deposition does not occur.
【００１９】図３は本発明のさらに他の実施例を示す概
略の縦断面図である。図３において、図１と同じ構成部
分については同一の符号を付し、説明を省略する。本実
施例におけるドラフトチューブ３は、本管１０と、この
本管１０の上部から水平方向に分岐された下部分岐管１
１、及び本管１０の下部から水平方向に分岐された下部
分岐管１２よりなっている。上部分岐管１１及び下部分
岐管１２はそれぞれ本管１０を中心にして複数本が放射
状に取り付けられている。そして、上部分岐管の吐出口
２１は上向きに設けられており、下部分岐管の吐出口２
２は水平方向に設けられている。FIG. 3 is a schematic vertical sectional view showing still another embodiment of the present invention. In FIG. 3, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. The draft tube 3 according to the present embodiment includes a main pipe 10 and a lower branch pipe 1 horizontally branched from an upper portion of the main pipe 10.
1 and a lower branch pipe 12 horizontally branched from the lower part of the main pipe 10. A plurality of upper branch pipes 11 and lower branch pipes 12 are radially mounted around the main pipe 10 as a center. The discharge port 21 of the upper branch pipe is provided upward, and the discharge port 2 of the lower branch pipe 2 is provided.
2 is provided in the horizontal direction.
【００２０】図３の構成による消化槽において、攪拌機
２を駆動させると、槽本体上部の汚泥が吸引されてドラ
フトチューブの本管１０内へ押し込まれる。本管１０内
へ押し込まれた汚泥のうち、その多くは本管下端の吐出
口２０から槽底に向かって吐出するが、一部は上部分岐
管の吐出口２１及び下部分岐管の吐出口２２からも吐出
する。そして、本管の吐出口２０から吐出した汚泥は槽
底部で反転し上昇して槽本体上部に戻り、再び攪拌機２
に吸引される。一方、上部分岐管の吐出口２１から吐出
した汚泥はそのまま外周部の液面６１に向かって上昇し
た後、中心に向かって流れ、攪拌機２に吸引される。
又、下部分岐管の吐出口２２から吐出した汚泥は槽本体
１の底と側壁の境界付近に当たって２方向に分流され、
その一つの流れは底面に沿って下方向に向かい、他の流
れは側壁に沿って上昇する。When the stirrer 2 is driven in the digestion tank having the structure shown in FIG. 3, the sludge on the upper part of the tank main body is sucked and pushed into the main pipe 10 of the draft tube. Most of the sludge pushed into the main pipe 10 is discharged from the discharge port 20 at the lower end of the main pipe toward the tank bottom, but a part of the sludge is discharged from the upper branch pipe 21 and the lower branch pipe 22. Also discharge from. Then, the sludge discharged from the discharge port 20 of the main pipe is reversed at the bottom of the tank and rises to return to the upper part of the tank main body, and again the agitator 2
Is sucked. On the other hand, the sludge discharged from the discharge port 21 of the upper branch pipe rises as it is toward the liquid surface 61 of the outer peripheral portion, then flows toward the center, and is sucked by the agitator 2.
Further, the sludge discharged from the discharge port 22 of the lower branch pipe hits the vicinity of the boundary between the bottom and the side wall of the tank body 1 and is divided into two directions.
One of them flows downward along the bottom surface, and the other flows rise along the side walls.
【００２１】このように、槽本体内には、槽底から槽上
部に及ぶ上下の循環流が形成されると共に、槽上部に
は、外周から中心部に至る循環流が形成され、更に、槽
の底部には、底面に沿って流れる循環流が形成されるの
で、槽内全体が良好な攪拌状態になる。そして、液面上
に生成するスカムは汚泥と共に攪拌機に吸引されて破砕
され、砂などが底面に堆積しなくなる。As described above, in the tank body, a vertical circulating flow extending from the tank bottom to the tank upper part is formed, and a circulating flow from the outer periphery to the center is formed in the tank upper part. Since a circulating flow that flows along the bottom surface is formed at the bottom of the tank, the entire inside of the tank is in a good stirring state. Then, the scum generated on the liquid surface is sucked together with the sludge by the agitator and crushed, so that sand and the like do not accumulate on the bottom surface.
【００２２】上述のように、本発明は、特に、槽本体
が、ソロバン玉型と称されるもの等のように、液面が形
成される面積が広い形状のものである場合に、大きな効
果が得られる。As described above, the present invention has a great effect particularly when the tank body has a shape in which the area where the liquid surface is formed is wide, such as what is called an abacus ball shape. Is obtained.
【００２３】[0023]
【発明の効果】本発明においては、攪拌機に連結された
ドラフトチューブが本管とこの本管から水平方向に分岐
された分岐管よりなり、槽本体の上部から本管に吸引さ
れた汚泥の一部が槽の周辺へ吐出するようになっている
ので、槽の周辺から中心部へ戻る循環流が形成され、汚
泥の攪拌が槽内全体に渡って行われる。このため、槽内
にデットスペースができなくなり、槽本体の形状がソロ
バン玉型のような偏平形状のものであっても、槽内を良
好な攪拌状態にすることができ、連続操業が可能にな
る。According to the present invention, the draft tube connected to the stirrer is composed of the main pipe and the branch pipe horizontally branched from the main pipe, and one of the sludge sucked into the main pipe from the upper part of the tank main body. Since the part discharges to the periphery of the tank, a circulation flow returning from the periphery of the tank to the central part is formed, and the sludge is agitated throughout the tank. For this reason, there is no dead space in the tank, and even if the tank body has a flat shape such as an abacus ball shape, the tank can be well stirred and continuous operation is possible. Become.
【００２４】そして、分岐管の吐出口が上向きに形成さ
れている場合には、槽周辺に強力な上昇流が発生して、
周辺液面部の攪拌が良好になり、スカムの破砕が一層促
進される。又、分岐管の吐出口が横向きに形成されてい
る場合には、内壁近傍の汚泥が激しく攪拌されるので、
内壁が清浄の状態に維持される。このため、連続操業が
より長期に渡って継続できる。When the outlet of the branch pipe is formed upward, a strong upward flow is generated around the tank,
The peripheral liquid surface is well stirred, and the scum crushing is further promoted. Also, when the outlet of the branch pipe is formed sideways, the sludge near the inner wall is vigorously stirred,
The inner wall is kept clean. Therefore, continuous operation can be continued for a longer period of time.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例を示す概略の縦断面図であ
る。FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention.
【図２】本発明の他の実施例を示す概略の縦断面図であ
る。FIG. 2 is a schematic vertical sectional view showing another embodiment of the present invention.
【図３】本発明のさらに他の実施例を示す概略の縦断面
図である。FIG. 3 is a schematic vertical sectional view showing still another embodiment of the present invention.
【図４】従来のソロバン玉型消化槽の概略を示す図であ
る。FIG. 4 is a diagram showing an outline of a conventional abacus ball type digestion tank.
【図５】従来の卵型消化槽の概略を示す図である。FIG. 5 is a diagram showing an outline of a conventional egg-type digester tank.
１ 槽本体 ２ 攪拌機 ３ ドラフトチューブ ４ 攪拌機のスクリュー ５ スクリューのケーシング ６ モータ １０ ドラフトチューブの本管 １１ ドラフトチューブの上部分岐管 １２ ドラフトチューブの下部分岐管 ２０ 本管の吐出口 ２１ 上部分岐管の吐出口 ２２ 下部分岐管の吐出口 ６０ 汚泥 ６１ 汚泥の液面 1 Tank Main Body 2 Stirrer 3 Draft Tube 4 Screw of Stirrer 5 Screw Casing 6 Motor 10 Main Draft Tube Main Pipe 11 Upper Draft Tube Branch Pipe 12 Lower Draft Tube Branch Pipe 20 Main Pipe Discharge Port 21 Upper Branch Pipe Discharge Outlet 22 Discharge port of lower branch pipe 60 Sludge 61 Liquid level of sludge
Claims (2)
攪拌機が垂設され、この攪拌機に連結され、攪拌機から
送られてきた汚泥を槽本体内に吐出させ汚泥の循環流を
形成させるドラフトチューブが備えられた汚泥消化槽に
おいて、前記ドラフトチューブが、垂設された本管とこ
の本管から水平方向に分岐された分岐管よりなり、前記
分岐管の吐出口が上向きに形成されていることを特徴と
する汚泥消化槽。1. A draft which stirs a sludge for flowing sludge above the tank main body, is connected to this stirrer, and discharges sludge sent from the stirrer into the tank main body to form a circulation flow of sludge. In a sludge digestion tank provided with a tube, the draft tube is composed of a vertically extending main pipe and a branch pipe horizontally branched from the main pipe, and a discharge port of the branch pipe is formed upward. A sludge digestion tank characterized by that.
向きに形成されていることを特徴とする請求項１に記載
の汚泥消化槽。2. The sludge digestion tank according to claim 1, wherein the outlet of the branch pipe of the draft tube is formed laterally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06174269A JP3139296B2 (en) | 1994-07-26 | 1994-07-26 | Sludge digester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06174269A JP3139296B2 (en) | 1994-07-26 | 1994-07-26 | Sludge digester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0833900A true JPH0833900A (en) | 1996-02-06 |
| JP3139296B2 JP3139296B2 (en) | 2001-02-26 |
Family
ID=15975703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06174269A Expired - Fee Related JP3139296B2 (en) | 1994-07-26 | 1994-07-26 | Sludge digester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3139296B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7172698B2 (en) * | 2003-10-09 | 2007-02-06 | Chicago Bridge & Iron Company | Anaerobic sludge digester |
| JP2007043909A (en) * | 2005-08-05 | 2007-02-22 | Yamaha Motor Co Ltd | Culture apparatus |
| KR101339037B1 (en) * | 2013-10-28 | 2013-12-09 | 주식회사 유성엔지니어링 | Egg-shaped digester |
| JP5412598B1 (en) * | 2013-08-21 | 2014-02-12 | 株式会社神鋼環境ソリューション | Operation method of methane fermentation tank |
| JP6259535B1 (en) * | 2017-01-13 | 2018-01-10 | 日本下水道事業団 | Sludge digester |
-
1994
- 1994-07-26 JP JP06174269A patent/JP3139296B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7172698B2 (en) * | 2003-10-09 | 2007-02-06 | Chicago Bridge & Iron Company | Anaerobic sludge digester |
| JP2007043909A (en) * | 2005-08-05 | 2007-02-22 | Yamaha Motor Co Ltd | Culture apparatus |
| JP5412598B1 (en) * | 2013-08-21 | 2014-02-12 | 株式会社神鋼環境ソリューション | Operation method of methane fermentation tank |
| KR101339037B1 (en) * | 2013-10-28 | 2013-12-09 | 주식회사 유성엔지니어링 | Egg-shaped digester |
| JP6259535B1 (en) * | 2017-01-13 | 2018-01-10 | 日本下水道事業団 | Sludge digester |
| JP2018111083A (en) * | 2017-01-13 | 2018-07-19 | 日本下水道事業団 | Sludge digestion tank |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3139296B2 (en) | 2001-02-26 |
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