JP2005052870A - Two-layer vertical screw press - Google Patents

Two-layer vertical screw press Download PDF

Info

Publication number
JP2005052870A
JP2005052870A JP2003287440A JP2003287440A JP2005052870A JP 2005052870 A JP2005052870 A JP 2005052870A JP 2003287440 A JP2003287440 A JP 2003287440A JP 2003287440 A JP2003287440 A JP 2003287440A JP 2005052870 A JP2005052870 A JP 2005052870A
Authority
JP
Japan
Prior art keywords
chamber
filtrate
screen
filtration chamber
screw
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
Application number
JP2003287440A
Other languages
Japanese (ja)
Other versions
JP2005052870A5 (en
JP4066912B2 (en
Inventor
Eiichi Ishigaki
栄一 石垣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ishigaki Co Ltd
Original Assignee
Ishigaki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ishigaki Co Ltd filed Critical Ishigaki Co Ltd
Priority to JP2003287440A priority Critical patent/JP4066912B2/en
Publication of JP2005052870A publication Critical patent/JP2005052870A/en
Publication of JP2005052870A5 publication Critical patent/JP2005052870A5/ja
Application granted granted Critical
Publication of JP4066912B2 publication Critical patent/JP4066912B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
    • B30B9/166—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms the screws being coaxially disposed in the same chamber

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Sludge (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-layer vertical screw press in which the installation area is reduced, the throughput of an original liquid is increased without lowering dehydration capacity and continuous operation is made possible. <P>SOLUTION: The installation area of a vertical screw press is reduced by providing an outer screw (4) and an inner screw (5) inside an outer screen (2) and an inner screen (3) which are concentric. An original liquid supply passage (27) is formed on the driving shaft (13) connected to the inner screw (5), this original liquid supply passage (27) communicates with an outer filtration chamber (8) and an inner filtration chamber (9) and, by the filtration chambers combined doubly and difference speed rotation, the large quantity of the original liquid can be processed. The outer filtration chamber (8), an outer filtration chamber passage (39) and an inner filtration chamber passage (40) are provided on the back pressure plate (22) of the two-layer vertical screw press (1) and a discharge chamber (36) in which a raking blade (38) is arranged is formed under the back pressure plate (22), then high squeeze is made possible with the back pressure plate (22) and the discharge chamber (36). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、下水汚泥や産業排水等の脱水に適したスクリュープレスに関し、特に、脱水性能を低下させることなく、大量処理が可能な縦型スクリュープレスの改良に関する。   The present invention relates to a screw press suitable for dewatering sewage sludge, industrial wastewater, and the like, and more particularly to an improvement of a vertical screw press capable of mass processing without deteriorating dewatering performance.

従来のスクリュープレスは、ろ過室に供給した凝集原液をスクリュー羽根で移送しながらスクリーンからろ液を分離し、凝集原液を濃縮、圧搾脱水してろ過室の終端から脱水ケーキを連続して取出すようにしている。そして、分離液排出孔を有する固定外筒と排水パイプの間に、内側と外側にスクリュー羽根を植設した回転内筒を同心的に設け、二重の環状間隙に供給した原液の容積を漸減せしめ、脱水性能を低下せずに処理量を増加させる固液分離装置が、特許文献１に記載してある。
実公昭６０−２５３５７号公報（実用新案登録請求の範囲、第２図） The conventional screw press separates the filtrate from the screen while transferring the flocculated stock solution supplied to the filtration chamber with screw blades, concentrates and squeezes the flocculated stock solution, and continuously removes the dehydrated cake from the end of the filtration chamber. I have to. A rotating inner cylinder with screw blades installed inside and outside is arranged concentrically between the fixed outer cylinder having the separation liquid discharge hole and the drain pipe, and the volume of the stock solution supplied to the double annular gap is gradually reduced. Patent Document 1 discloses a solid-liquid separation apparatus that increases the throughput without reducing the dehydration performance.
Japanese Utility Model Publication No. 60-25357 (claim for utility model registration, Fig. 2)

上記従来のスクリュープレスは、金属ろ材を使用しているため、ケーキの剥離性がよく、ろ材の洗浄も少なく、連続運転が可能となるが、横置したスクリュープレスの円筒状のろ過室が、ろ過面積の割りには広い設置面積が必要である。ろ過室の排出口に設けた背圧板の調整が困難で、圧搾部にケーキが充満して含水率が低下すると、ケーキがスクリューと供回りして、外筒内面との間に滑りを生じ排出できなくなる。この発明は、縦型の二重構造のろ過室を構成し、設置面積を小さくして、原液の脱水性能を低下せずに処理量を増加させ、連続運転を可能とした２層式縦型スクリュープレスを提供する。   Since the conventional screw press uses a metal filter medium, the peelability of the cake is good, the filter medium is less washed, and continuous operation is possible. A large installation area is required for the filtration area. It is difficult to adjust the back pressure plate provided at the discharge port of the filtration chamber, and when the cake is filled in the compressed part and the moisture content decreases, the cake rotates with the screw and slips between the inner surface of the outer cylinder and discharges. become unable. This invention constitutes a vertical double-structure filtration chamber, reduces the installation area, increases the throughput without deteriorating the dewatering performance of the stock solution, and enables a continuous operation, a two-layer vertical type Provide screw press.

この発明に係わる２層式縦型スクリュープレスは、同心状に立設した外側スクリーンと内側スクリーンに、外側スクリューと内側スクリューを配設して外側ろ過室と内側ろ過室を形成し、内側スクリューの上部に連結した駆動軸に原液供給路を設け、この原液供給路を外側ろ過室と内側ろ過室に連通させると共に、外側ろ過室と内側ろ過室の下端部を支架する背圧板に外側ろ過室通路と内側ろ過室通路を設け、この背圧板の下部に円環状の排出室を形成し、排出室に回転自在な掻出羽根を配設したものである。   A two-layer vertical screw press according to the present invention has an outer screen and an inner screw arranged on a concentric outer screen and inner screen to form an outer filtration chamber and an inner filtration chamber. An undiluted solution supply path is provided in the drive shaft connected to the upper part, and this undiluted solution supply path is connected to the outer filtration chamber and the inner filtration chamber, and the outer filtration chamber passage is connected to the back pressure plate that supports the lower ends of the outer filtration chamber and the inner filtration chamber. And an inner filtration chamber passage, an annular discharge chamber is formed below the back pressure plate, and a rotatable scraping blade is disposed in the discharge chamber.

スクリーンの洗浄手段が、外側スクリーンと内側スクリーンを回転自在に配設し、外側スクリーンの周部にカバーを配設して外側ろ室を形成して、外側洗浄管を立設すると共に、外側スクリューと内側スクリーンの間に内側ろ室を形成し、スクリーンに対設して内側洗浄管を立設したものである。そして、ろ液と洗浄排水の排出手段が、背圧板に内側ろ液室と外側ろ液室の底部に連通する複数の内側ろ液通路を設け、外側ろ液室の底部にろ液排出管を連結して、ろ液排出管から外側ろ液室と内側ろ液室のろ液と洗浄排水を排出するものである。   The screen cleaning means is configured such that the outer screen and the inner screen are rotatably disposed, a cover is disposed around the outer screen to form an outer filter chamber, an outer cleaning pipe is erected, and an outer screw An inner filter chamber is formed between the inner screen and the inner screen, and an inner cleaning pipe is erected on the screen. The drainage means for the filtrate and washing drainage is provided with a plurality of inner filtrate passages communicating with the bottoms of the inner filtrate chamber and the outer filtrate chamber in the back pressure plate, and a filtrate discharge pipe is provided at the bottom of the outer filtrate chamber. It connects and discharges the filtrate and washing waste_water | drain of an outer side filtrate chamber and an inner side filtrate chamber from a filtrate discharge pipe.

この発明に係る２層式縦型スクリュープレスは上記のように構成してあり、縦型のスクリュープレスが設置面積を小さくし、スクリュープレスのろ過室を内側ろ過室と外側ろ過室の二重に組合せることにより、原液の大量処理が可能となる。外側ろ過室と内側ろ過室の下方に移送された濃縮原液は、上方の原液の重力とスクリュー羽根の搬送力による圧搾と、排出室からの背圧により低含水率の脱水ケーキとすることができ、従来装置と比較して、脱水性能を低下させることがない。そして、外側ろ過室と内側ろ過室の底部から圧入される脱水ケーキに排出室から背圧を加えながら、排出室の掻出羽根がケーキを掻き取るので、背圧板と排出室が高圧搾を可能とし、均一な含水率の脱水ケーキとすることができる。なお、背圧板から押し出されるケーキを掻出羽根が掻き取るので、背圧板で背圧を加えながらも背圧板のろ過室通路を閉塞させることがない。   The two-layer vertical screw press according to the present invention is configured as described above, the vertical screw press reduces the installation area, and the screw press filtration chamber is doubled between the inner filtration chamber and the outer filtration chamber. By combining them, a large amount of the stock solution can be processed. The concentrated stock solution transferred to the lower side of the outer filtration chamber and the inner filtration chamber can be made into a dehydrated cake with a low water content by pressing the gravity of the upper stock solution and the conveying force of the screw blades and the back pressure from the discharge chamber. As compared with the conventional apparatus, the dewatering performance is not deteriorated. And while applying the back pressure from the discharge chamber to the dehydrated cake that is press-fitted from the bottom of the outer filtration chamber and the inner filtration chamber, the scraping blades of the discharge chamber scrape the cake, allowing the back pressure plate and the discharge chamber to be pressed. And a dehydrated cake having a uniform water content can be obtained. In addition, since the scraping blade scrapes off the cake pushed out from the back pressure plate, the filtration chamber passage of the back pressure plate is not blocked while the back pressure is applied by the back pressure plate.

ろ過性が悪くなった時には、連続運転を行ないながら、適宜、洗浄水を噴射すれば、回転している外側スクリーンと内側スクリーンの目詰まり物を洗い流してろ過面が再生できる。固形化したケーキがスクリューと供回りしようとしても、ケーキを軟化させて供回りを防止できる。また、背圧板を利用して内側ろ液室のろ液と洗浄排水を外側ろ液室の底部に排出するので、排出路の構造が簡単となり、差速回転するスクリーンとスクリューの邪魔となることもない。   When the filterability is deteriorated, if the cleaning water is appropriately jetted while performing the continuous operation, the cloggings of the rotating outer screen and inner screen are washed away, and the filtration surface can be regenerated. Even if the cake that has been solidified is about to be rotated with the screw, the cake can be softened to prevent the rotation. In addition, the back pressure plate is used to discharge the filtrate and washing wastewater from the inner filtrate chamber to the bottom of the outer filtrate chamber, which simplifies the structure of the discharge path and obstructs the screen and screw that rotate at a different speed. Nor.

この発明に係る２層式縦型スクリュープレスは上記のように構成してあり
内側スクリューの駆動軸の原液供給路から内側ろ過室と外側ろ過室に原液を圧入し、内側ろ過室と外側ろ過室に原液を充満させる。次に、内側ろ過室と外側ろ過室に原液を圧入しながら、外側スクリーンと内側スクリーン及び外側スクリューと内側スクリューを逆方向に差速回転させると、スクリュー羽根の搬送圧と垂直姿勢の重力で外側スクリーンと内側スクリーンのろ過面からろ液が分離され、原液は濃縮されながら下方に移送される。 The two-layer vertical screw press according to the present invention is configured as described above, and the stock solution is pressed into the inner filtration chamber and the outer filtration chamber from the stock solution supply path of the drive shaft of the inner screw, and the inner filtration chamber and the outer filtration chamber. To fill the stock solution. Next, while the stock solution is being pressed into the inner filtration chamber and the outer filtration chamber, the outer screen, the inner screen, the outer screw, and the inner screw are rotated in the reverse direction in the reverse direction, and the outer pressure and the vertical posture of the gravity force The filtrate is separated from the filtration surfaces of the screen and the inner screen, and the stock solution is transferred downward while being concentrated.

下方の濃縮原液は、上方の原液重量による押圧力と、スクリュー羽根の搬送力の相乗作用により高圧搾されて、さらにろ過面からろ液を分離する。同時に、固液分離によりケーキ層が形成された外側スクリーンと内側スクリーンのろ過面を、外側スクリューと内側スクリューが摺接してケーキ層を掻き取ってろ材面を再生する。原液は圧密されてケーキ状となり、外側ろ過室と内側ろ過室の底部に設けた背圧板の外側ろ過室通路と内側ろ過室通路から円環状の排出室に押出される。掻出羽根はそのケーキを掻き取りながら、掻出羽根の回転クサビ作用とケーキを半径方向に湾曲移動させる力が増大し、ケーキに大きな剪断力が加えられる。   The lower concentrated stock solution is squeezed by the synergistic action of the pressing force due to the weight of the upper stock solution and the conveying force of the screw blades, and further separates the filtrate from the filtration surface. Simultaneously, the outer screen and the inner screen on which the cake layer is formed by solid-liquid separation are brought into sliding contact with the outer screw and the inner screw to scrape the cake layer to regenerate the filter material surface. The stock solution is consolidated into a cake and extruded from the outer and inner filtration chamber passages of the back pressure plate provided at the bottom of the outer and inner filtration chambers into an annular discharge chamber. While the scraping blade scrapes the cake, the rotational wedge action of the scraping blade and the force for curving and moving the cake in the radial direction increase, and a large shearing force is applied to the cake.

排出室に脱水ケーキが充満してきた時に、排出室の排出口を開放すれば、水分を均一化した脱水ケーキを連続して取出すことができる。スクリュープレスのろ過室を内側ろ過室と外側ろ過室の二重に組合せることにより、脱水性能を低下せずに、原液の大量処理が可能となる。外側スクリーンと内側スクリーンのろ過性が悪くなった時には、原液圧入を停止させ、あるいは脱水運転を行いながら、適宜外側スクリーンと内側スクリーン洗浄管から洗浄水を噴射すれば、回転している外側スクリーンと内側スクリーンの目詰まり物を洗い流してろ過面が再生できる。   When the dewatering cake is filled in the discharge chamber, if the discharge port of the discharge chamber is opened, the dewatered cake with uniform moisture can be continuously taken out. By combining the filtration chambers of the screw press with the inner filtration chamber and the outer filtration chamber in combination, a large amount of the stock solution can be processed without deteriorating the dehydration performance. When the filterability of the outer screen and the inner screen deteriorates, if the washing water is sprayed from the outer screen and the inner screen washing tube appropriately while stopping the stock solution injection or dehydrating operation, the rotating outer screen and The filtration surface can be regenerated by washing away the clogging on the inner screen.

この発明の実施例を図面に基づき詳述すると、図１は２層式縦型スクリュープレスの縦断面図であって、２層式縦型スクリュープレス１は、立設した密閉状の外側スクリーン２の内部に内側スクリーン３が同心状に配設してあり、外側スクリーン２と内側スクリーン３の周面に金属ろ材を張設してろ過面としてある。外側スクリーン２と内側スクリーン３の内側に、それぞれ台形状の外側スクリュー４と内側スクリュー５が配設してあり、外側スクリュー４と内側スクリュー５の外周面にそれぞれ螺旋状のスクリュー羽根６、７が巻き掛けてある。外側スクリーン２と外側スクリュー４の間、及び内側スクリーン３と内側スクリュー５の間に、上部から下部に向かって容積を相対的に減少させる外側ろ過室８と内側ろ過室９が形成してある。   An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a two-layer type vertical screw press, and the two-layer type vertical screw press 1 is an upright sealed outer screen 2. The inner screen 3 is concentrically disposed inside the inner screen 3, and a metal filter medium is stretched around the outer screen 2 and the inner screen 3 to form a filtering surface. A trapezoidal outer screw 4 and an inner screw 5 are disposed inside the outer screen 2 and the inner screen 3, respectively, and helical screw blades 6 and 7 are provided on the outer peripheral surfaces of the outer screw 4 and the inner screw 5, respectively. It is wrapped around. An outer filtration chamber 8 and an inner filtration chamber 9 are formed between the outer screen 2 and the outer screw 4 and between the inner screen 3 and the inner screw 5 to relatively reduce the volume from the upper part toward the lower part.

図１に示すように、外側スクリーン２の外周部に密閉状のカバー１０が配設してあり、外側スクリーン２で分離したろ液を流入させる外側ろ液室１１を形成してある。また、内側スクリーン３と外側スクリュー４の間にも内側ろ液室１２を形成してある。図２は２層式縦型スクリュープレスの上部の拡大図であって、立設した内側スクリュー５の上部壁に円筒状の駆動軸１３が連結してあり、先端部にスプロケット１４が嵌着してある。内側スクリーン３、外側スクリュー４及び外側スクリーン２の上部壁に連結したフランジ１５、１６、１７を、内側スクリュー５の駆動軸１３の周部に同心状に摺接させてあり、外側スクリーン２のフランジ１７に軸受１８が外嵌してある。駆動軸１３に外挿したそれぞれのフランジ１５、１６、１７にもスプロケット１９、２０、２１が嵌着してあり、これらのスプロケット１４、１９、２０、２１は公知の駆動手段に連動連結してある。   As shown in FIG. 1, a sealed cover 10 is disposed on the outer peripheral portion of the outer screen 2, and an outer filtrate chamber 11 into which the filtrate separated by the outer screen 2 flows is formed. An inner filtrate chamber 12 is also formed between the inner screen 3 and the outer screw 4. FIG. 2 is an enlarged view of the upper part of the two-layer vertical screw press, in which a cylindrical drive shaft 13 is connected to the upper wall of the upright inner screw 5 and a sprocket 14 is fitted to the tip. It is. The flanges 15, 16 and 17 connected to the inner screen 3, the outer screw 4 and the upper wall of the outer screen 2 are concentrically slidably contacted with the periphery of the drive shaft 13 of the inner screw 5. A bearing 18 is externally fitted to 17. Sprockets 19, 20, and 21 are also fitted to the flanges 15, 16, and 17 that are externally attached to the drive shaft 13, and these sprockets 14, 19, 20, and 21 are interlocked and connected to known drive means. is there.

図３は２層式縦型スクリュープレスの下端部の拡大図であって、外側スクリーン２、内側スクリーン３、外側スクリュー４及び内側スクリュー５の下端が、２層式縦型スクリュープレス１の下端部の背圧板２２に配設した軸受２３、２４、２５、２６に回転自在に軸支してある。駆動手段に連動連結したスプロケット１４、１９、２０、２１で外側スクリュー４と内側スクリュー５を同じ方向に回転させ、外側スクリーン２と内側スクリーン３を反対方向に回転させるようにしてある。なお、外側スクリーン２と内側スクリーン３は、ろ過運転中も回転させてもよく、あるいは、ろ過面の洗浄時にのみ回転させてもよいもので、原液の性状により適宜選択できるものである。   FIG. 3 is an enlarged view of the lower end of the two-layer vertical screw press, and the lower ends of the outer screen 2, inner screen 3, outer screw 4 and inner screw 5 are the lower ends of the two-layer vertical screw press 1. Are rotatably supported by bearings 23, 24, 25, and 26 disposed on the back pressure plate 22. The outer screw 4 and the inner screw 5 are rotated in the same direction by the sprockets 14, 19, 20, and 21 interlocked with the driving means, and the outer screen 2 and the inner screen 3 are rotated in opposite directions. The outer screen 2 and the inner screen 3 may be rotated during the filtration operation, or may be rotated only at the time of cleaning the filtration surface, and can be appropriately selected depending on the properties of the stock solution.

図２に示すように、内側スクリュー５の駆動軸１３に原液供給路２７が設けてあり、駆動軸１３の下端部に複数の原液通路孔２８・・・を開口してある。原液を駆動軸１３の原液供給路２７から内側スクリーン３の上部壁と内側スクリュー５の上部壁の間に圧入し、内側ろ過室９に供給する。そして、外側スクリュー４と内側スクリーン３の上端部に複数の原液通路孔２９、３０・・・が開口してあり、外側スクリュー４の内周面に延設し、摺接させた内側スクリーン３の上部壁と、内側スクリーン３の上方外周部に立設した背圧板３１で給液路３２を形成してある。内側ろ過室９に圧入した原液の略半分を給液路３２から外側ろ過室８に流入させる。２層式縦型スクリュープレス１は、ろ過室を外側ろ過室８と内側ろ過室９の二重に組合せて、原液の大量処理を可能とする。   As shown in FIG. 2, a stock solution supply path 27 is provided in the drive shaft 13 of the inner screw 5, and a plurality of stock solution passage holes 28 are opened at the lower end portion of the drive shaft 13. The stock solution is press-fitted between the upper wall of the inner screen 3 and the upper wall of the inner screw 5 from the raw solution supply path 27 of the drive shaft 13 and is supplied to the inner filtration chamber 9. A plurality of stock solution passage holes 29, 30... Are opened at the upper end portions of the outer screw 4 and the inner screen 3, extend to the inner peripheral surface of the outer screw 4, and are slidably contacted. A liquid supply path 32 is formed by an upper wall and a back pressure plate 31 erected on the upper outer peripheral portion of the inner screen 3. Approximately half of the stock solution press-fitted into the inner filtration chamber 9 is allowed to flow into the outer filtration chamber 8 from the liquid supply path 32. The two-layer type vertical screw press 1 allows a large amount of the stock solution to be processed by combining the filtration chamber with the outer filtration chamber 8 and the inner filtration chamber 9.

原液を原液供給路２７から内側ろ過室９と外側ろ過室１１に圧入して、外側スクリーン２と内側スクリーン３を同方向に、外側スクリュー４と内側スクリュー５を反対方向に差速回転させると、外側スクリュー４と内側スクリュー５のスクリュー羽根６、７の搬送圧と垂直姿勢の重力で外側スクリーン２と内側スクリーン３のろ過面からろ液が分離される。逆方向の差速回転により、原液の供給量を増加させることができる。ろ液は外側ろ液室１１と内側ろ液室１２に排出されて、原液は濃縮されながら下方に移送される。この濃縮原液は、上方の原液重量による押圧力と、スクリュー羽根６、７の搬送力の相乗作用により高圧搾されて、さらにろ過面からろ液を分離して、ケーキ状となる。同時に、固液分離によりケーキ層が形成された外側スクリーン２と内側スクリーン３のろ過面を、外側スクリュー４と内側スクリュー５が摺接してケーキ層を掻き取り、ろ過面を再生し、連続運転を可能とする。   When the stock solution is press-fitted from the stock solution supply path 27 into the inner filtration chamber 9 and the outer filtration chamber 11, the outer screen 2 and the inner screen 3 are rotated in the same direction, and the outer screw 4 and the inner screw 5 are rotated in the opposite direction. The filtrate is separated from the filtration surfaces of the outer screen 2 and the inner screen 3 by the conveying pressure of the screw blades 6 and 7 of the outer screw 4 and the inner screw 5 and the vertical gravity. The supply amount of the stock solution can be increased by the differential speed rotation in the reverse direction. The filtrate is discharged to the outer filtrate chamber 11 and the inner filtrate chamber 12, and the stock solution is transferred downward while being concentrated. This concentrated stock solution is squeezed by high pressure due to the synergistic action of the pressing force due to the weight of the stock solution above and the conveying force of the screw blades 6 and 7, and further the filtrate is separated from the filtration surface to form a cake. At the same time, the outer screw 4 and the inner screw 5 are in sliding contact with the filtration surface of the outer screen 2 and the inner screen 3 on which the cake layer is formed by solid-liquid separation, scraping the cake layer, regenerating the filtration surface, and performing continuous operation. Make it possible.

図１及び図２に示すように、外側ろ液室１１と内側ろ液室１２に外側洗浄管３３と内側洗浄管３４がそれぞれ立設してある。外側洗浄管３３と内側洗浄管３４の下端部は、２層式縦型スクリュープレス１の外部の洗浄水管３５に連結してある。外側スクリーン２と内側スクリーン３のろ過面が目詰まりしてろ過性が悪くなった時には、原液の圧入を停止させ、あるいはろ過運転を行ないながら、適宜外側スクリーン２と内側スクリーン３に外側洗浄管３３と内側洗浄管３４から洗浄水を噴射して、外側スクリーン２と内側スクリーン３の目詰まり物を洗い流してろ過面が再生できる。この洗浄排水は、外側ろ液室１１と内側ろ液室１２を流下してろ液排出管４３から排出される。外側ろ過室８の排出側で固形化したケーキが外側スクリュー４と供回りしようとしても、洗浄水を噴射すれば、ケーキを軟化させて供回りを防止させることもできる。   As shown in FIGS. 1 and 2, an outer washing tube 33 and an inner washing tube 34 are provided upright in the outer filtrate chamber 11 and the inner filtrate chamber 12, respectively. The lower ends of the outer cleaning pipe 33 and the inner cleaning pipe 34 are connected to a cleaning water pipe 35 outside the two-layer vertical screw press 1. When the filtration surfaces of the outer screen 2 and the inner screen 3 are clogged and the filterability is deteriorated, the outer washing pipe 33 is appropriately attached to the outer screen 2 and the inner screen 3 while stopping the press-fitting of the stock solution or performing the filtration operation. Then, the cleaning water is sprayed from the inner cleaning pipe 34, and the clogging of the outer screen 2 and the inner screen 3 is washed away, so that the filtration surface can be regenerated. The washing waste water flows down the outer filtrate chamber 11 and the inner filtrate chamber 12 and is discharged from the filtrate discharge pipe 43. Even if the cake solidified on the discharge side of the outer filtration chamber 8 tries to be brought together with the outer screw 4, if the washing water is sprayed, the cake can be softened to prevent the delivery.

図４は２層式縦型スクリュープレスの下端部の排出室の平面図であって、背圧板２２の下部に円環状の排出室３６を形成し、排出室３６に羽根駆動軸３７に嵌着したナタ爪状の掻出羽根３８が回転自在に配設してある。図５は背圧板の平面図であって、背圧板２２に、外側ろ過室８及び内側ろ過室９と排出室３６に連通する複数の円弧状の外側ろ過室通路３９・・・と内側ろ過室通路４０・・・を設けてある。背圧板２２の背圧と外筒スクリュー４と内筒スクリュー５の搬送圧で圧密脱水されて、低含水率のケーキが、外側ろ過室８と内側ろ過室９の底部に設けた背圧板２２の外側ろ過室通路３９と内側ろ過室通路４０から円環状の排出室３６に押出される。   FIG. 4 is a plan view of the discharge chamber at the lower end of the two-layer vertical screw press. An annular discharge chamber 36 is formed in the lower portion of the back pressure plate 22, and the blade drive shaft 37 is fitted in the discharge chamber 36. The claw-shaped scraping blade 38 is rotatably arranged. FIG. 5 is a plan view of the back pressure plate. The back pressure plate 22 is connected to the outer filtration chamber 8, the inner filtration chamber 9, and the discharge chamber 36, and a plurality of arc-shaped outer filtration chamber passages 39. A passage 40 is provided. The back pressure plate 22 provided at the bottoms of the outer filtration chamber 8 and the inner filtration chamber 9 is formed by dehydration by the back pressure of the back pressure plate 22 and the conveying pressure of the outer cylinder screw 4 and the inner cylinder screw 5. It is extruded from the outer filtration chamber passage 39 and the inner filtration chamber passage 40 to the annular discharge chamber 36.

掻出羽根３８はそのケーキを掻き取りながら、掻出羽根３８の回転クサビ作用とケーキを半径方向に湾曲移動させる力が増大し、ケーキに大きな剪断力が加えられ、ケーキ中の水分を均一化させる。背圧板２２から押し出されるケーキを掻出羽根３８が掻き取るので、背圧板２２で背圧を加えながらも背圧板２２の外側ろ過室通路３９と内側ろ過室通路４０を閉塞させることがない。排出室３６に仕切弁４１を有するケーキ排出管４２が連結してあり、排出室３６に脱水ケーキが充満してきた時に、仕切弁４１を開放すれば、排出室３６の脱水ケーキを連続して取出すことができる。脱水性能を低下せずに、原液の大量処理が可能となる。   While scraping blade 38 scrapes off the cake, the rotational wedge action of scraping blade 38 and the force to move the cake in the radial direction increase, and a large shearing force is applied to the cake, making the moisture in the cake uniform. Let Since the scraping blade 38 scrapes off the cake pushed out from the back pressure plate 22, the back filtration plate 22 does not block the outer filtration chamber passage 39 and the inner filtration chamber passage 40 while applying back pressure. A cake discharge pipe 42 having a gate valve 41 is connected to the discharge chamber 36, and when the drain valve 36 is opened when the drain chamber 36 is filled with the dehydrated cake, the dehydrated cake in the discharge chamber 36 is continuously taken out. be able to. A large amount of the stock solution can be processed without degrading the dewatering performance.

図３に示すように、外側ろ液室１１の底部にろ液排出管４３が連結してあり、ろ液排出管４３からろ液と洗浄排水を排出するようにしてあり、ろ液排出管４３の排水経路を外部配管上の切替弁で切替えて、ろ液と洗浄排水を分離する。また、背圧板２２に内側ろ液室１２と外側ろ液室１１の底部に連通する複数の内側ろ液通路４４・・・が設けてある。この内側ろ液通路４４は、背圧板２２の表面に内側ろ液室１２の底部に連通する複数の円弧状の凹溝４４ａと、凹溝に開口して傾斜状の貫通孔４４ｂを外側ろ液室１１の底部に連通させた構造としてある。背圧板２２を利用して内側ろ液室１２のろ液と洗浄排水を外側ろ液室１１の底部に排出するので、排出路の構造が簡単となり、差速回転する外側スクリーン２、内側スクリーン３、外側スクリュー４及び内側スクリュー５の邪魔となることもない。   As shown in FIG. 3, a filtrate discharge pipe 43 is connected to the bottom of the outer filtrate chamber 11, and filtrate and washing waste water are discharged from the filtrate discharge pipe 43. The drainage route is switched by a switching valve on the external pipe to separate the filtrate and washing wastewater. The back pressure plate 22 is provided with a plurality of inner filtrate passages 44 communicating with the bottoms of the inner filtrate chamber 12 and the outer filtrate chamber 11. The inner filtrate passage 44 includes a plurality of arc-shaped concave grooves 44 a communicating with the bottom of the inner filtrate chamber 12 on the surface of the back pressure plate 22, and an inclined through hole 44 b that opens to the outer groove to form the outer filtrate. The structure communicates with the bottom of the chamber 11. Since the back pressure plate 22 is used to discharge the filtrate and washing waste water in the inner filtrate chamber 12 to the bottom of the outer filtrate chamber 11, the structure of the discharge path is simplified, and the outer screen 2 and the inner screen 3 that rotate at different speeds. The outer screw 4 and the inner screw 5 are not disturbed.

縦型のスクリュープレスが設置面積を小さくし、背圧板と排出室が高圧搾を可能とする。そして、スクリュープレスのろ過室を内側ろ過室と外側ろ過室の二重に組合せ、スクリューとスクリーンを反対方向に回転させるので、脱水性能を低下せずに、原液の大量処理が可能となる。濃度の低い大容量の処理を必要とする下水汚泥や産業排水等の脱水に適したスクリュープレスとなる。   The vertical screw press reduces the installation area, and the back pressure plate and discharge chamber enable high-pressure squeezing. And since the filtration chamber of a screw press is combined with an inner filtration chamber and an outer filtration chamber doubly, and a screw and a screen are rotated in the opposite direction, mass processing of the undiluted | stock solution becomes possible, without reducing dehydration performance. The screw press is suitable for dewatering sewage sludge, industrial wastewater, etc. that require a large volume treatment with a low concentration.

この発明に係る２層式縦型スクリュープレスの縦断面図である。1 is a longitudinal sectional view of a two-layer vertical screw press according to the present invention. ２層式縦型スクリュープレスの上部の拡大図である。It is an enlarged view of the upper part of a two-layer type vertical screw press. ２層式縦型スクリュープレスの下部の拡大図であるIt is an enlarged view of the lower part of a two-layer type vertical screw press. 同じく、排出室の平面図である。Similarly, it is a top view of a discharge chamber. 同じく、背圧板の平面図である。Similarly, it is a top view of a back pressure plate.

符号の説明Explanation of symbols

２ 外側スクリーン
３ 内側スクリーン
４ 外側スクリュー
５ 内側スクリュー
８ 外側ろ過室
９ 内側ろ過室
１０ カバー
１１ 外側ろ液室
１２ 内側ろ液室
１３ 駆動軸
２２ 背圧板
２７ 原液供給路
３３ 外側洗浄管
３４ 内側洗浄管
３６ 排出室
３８ 掻出羽根
３９ 外側ろ過室通路
４０ 内側ろ過室通路
４３ ろ液排出管
４４ 内側ろ液通路 2 outer screen 3 inner screen 4 outer screw 5 inner screw 8 outer filtration chamber 9 inner filtration chamber 10 cover 11 outer filtrate chamber 12 inner filtrate chamber 13 drive shaft 22 back pressure plate 27 stock solution supply path 33 outer cleaning tube 34 inner cleaning tube 36 discharge chamber 38 scraping blade 39 outer filtration chamber passage 40 inner filtration chamber passage 43 filtrate discharge pipe 44 inner filtrate passage

Claims (3)

同心状に立設した外側スクリーン（２）と内側スクリーン（３）に、外側スクリュー（４）と内側スクリュー（５）を配設して外側ろ過室（８）と内側ろ過室（９）を形成し、内側スクリュー（５）の上部に連結した駆動軸（１３）に原液供給路（２７）を設け、この原液供給路（２７）を外側ろ過室（８）と内側ろ過室（９）に連通させると共に、外側ろ過室（８）と内側ろ過室（９）の下端部を支架する背圧板（２２）に外側ろ過室通路（３９）と内側ろ過室通路（４０）を設け、この背圧板（２２）の下部に円環状の排出室（３６）を形成し、排出室（３６）に回転自在な掻出羽根（３８）を配設したことを特徴とする２層式縦型スクリュープレス。 An outer screw (4) and an inner screw (5) are arranged on the outer screen (2) and the inner screen (3) standing concentrically to form an outer filtration chamber (8) and an inner filtration chamber (9). Then, a stock solution supply path (27) is provided in the drive shaft (13) connected to the upper part of the inner screw (5), and this stock solution supply path (27) communicates with the outer filtration chamber (8) and the inner filtration chamber (9). In addition, an outer filtration chamber passage (39) and an inner filtration chamber passage (40) are provided on the back pressure plate (22) that supports the lower ends of the outer filtration chamber (8) and the inner filtration chamber (9). 22) A two-layer vertical screw press characterized in that an annular discharge chamber (36) is formed at the bottom of 22), and a rotatable scraping blade (38) is disposed in the discharge chamber (36). 上記外側スクリーン（２）と内側スクリーン（３）を回転自在に配設し、外側スクリーン（２）の外周部にカバー（１０）を配設して外側ろ液室（１１）を形成して、外側ろ液室（１１）に外側洗浄管（３３）を立設すると共に、外側スクリュー（４）と内側スクリーン（３）の間に内側ろ液室（１２）を形成して、内側ろ液室（１２）に内側洗浄管（３４）を立設したことを特徴とする２層式縦型スクリュープレス。 The outer screen (2) and the inner screen (3) are rotatably disposed, a cover (10) is disposed on the outer periphery of the outer screen (2) to form an outer filtrate chamber (11), An outer washing tube (33) is erected in the outer filtrate chamber (11), and an inner filtrate chamber (12) is formed between the outer screw (4) and the inner screen (3) to form an inner filtrate chamber. A double-layer vertical screw press characterized in that an inner cleaning pipe (34) is erected on (12). 上記背圧板（２２）に内側ろ液室（１２）と外側ろ液室（１１）の底部に連通する複数の内側ろ液通路（４４・・・）を設け、外側ろ液室（１１）の底部にろ液排出管（４３）を連結して、ろ液排出管（４３）から外側ろ液室（１１）と内側ろ液室（１２）のろ液と洗浄排水を排出することを特徴とする２層式縦型スクリュープレス。 The back pressure plate (22) is provided with a plurality of inner filtrate passages (44...) Communicating with the bottoms of the inner filtrate chamber (12) and the outer filtrate chamber (11), and the outer filtrate chamber (11). The filtrate discharge pipe (43) is connected to the bottom, and the filtrate and washing waste water in the outer filtrate chamber (11) and the inner filtrate chamber (12) are discharged from the filtrate discharge pipe (43). Two-layer vertical screw press.
JP2003287440A 2003-08-06 2003-08-06 Two-layer vertical screw press Expired - Fee Related JP4066912B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003287440A JP4066912B2 (en) 2003-08-06 2003-08-06 Two-layer vertical screw press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003287440A JP4066912B2 (en) 2003-08-06 2003-08-06 Two-layer vertical screw press

Publications (3)

Publication Number Publication Date
JP2005052870A true JP2005052870A (en) 2005-03-03
JP2005052870A5 JP2005052870A5 (en) 2005-09-29
JP4066912B2 JP4066912B2 (en) 2008-03-26

Family

ID=34366416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003287440A Expired - Fee Related JP4066912B2 (en) 2003-08-06 2003-08-06 Two-layer vertical screw press

Country Status (1)

Country Link
JP (1) JP4066912B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015052983A1 (en) * 2013-10-10 2015-04-16 月島機械株式会社 Vertical screw press-type filtration device
WO2015064176A1 (en) * 2013-10-31 2015-05-07 月島機械株式会社 Vertical screw-press filtration device
JP2015093210A (en) * 2013-11-08 2015-05-18 月島機械株式会社 Vertical screw press type filter device
JP2015100845A (en) * 2013-11-28 2015-06-04 月島機械株式会社 Vertical screw press type filter device
JP2015100741A (en) * 2013-11-25 2015-06-04 月島機械株式会社 Vertical screw press type filtration apparatus
CN108928028A (en) * 2018-08-20 2018-12-04 遵义福泰豪再生资源有限公司 A kind of solid waste recovery and rinsing compression forming equipment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015052983A1 (en) * 2013-10-10 2015-04-16 月島機械株式会社 Vertical screw press-type filtration device
JP2015073957A (en) * 2013-10-10 2015-04-20 月島機械株式会社 Vertical screw-press-type filtration device
WO2015064176A1 (en) * 2013-10-31 2015-05-07 月島機械株式会社 Vertical screw-press filtration device
JP2015085269A (en) * 2013-10-31 2015-05-07 月島機械株式会社 Vertical screw press type filtration apparatus
JP2015093210A (en) * 2013-11-08 2015-05-18 月島機械株式会社 Vertical screw press type filter device
JP2015100741A (en) * 2013-11-25 2015-06-04 月島機械株式会社 Vertical screw press type filtration apparatus
JP2015100845A (en) * 2013-11-28 2015-06-04 月島機械株式会社 Vertical screw press type filter device
CN108928028A (en) * 2018-08-20 2018-12-04 遵义福泰豪再生资源有限公司 A kind of solid waste recovery and rinsing compression forming equipment
CN108928028B (en) * 2018-08-20 2024-01-23 河津市恒泰科技有限公司 Solid waste recycling, cleaning, compressing and forming equipment

Also Published As

Publication number Publication date
JP4066912B2 (en) 2008-03-26

Similar Documents

Publication Publication Date Title
US6634508B1 (en) Screw press
US3695173A (en) Sludge dewatering
JP6498139B2 (en) Solid-liquid separation device and solid-liquid separation system
JP2004130274A (en) Screw-extruding dewatering-equipment and its operation method
KR101495906B1 (en) Impurities disposer improved dehydration performance
JP3903070B1 (en) Sludge dewatering device and sludge dewatering method using sludge dewatering device
JP4066912B2 (en) Two-layer vertical screw press
JP4072685B2 (en) Vertical screw press and its operating method
JP4702358B2 (en) Screw press with concentration mechanism
JP3775232B2 (en) Screw press with concentration function
JP3903069B1 (en) Sludge dewatering method using rotary pressure dehydrator and rotary pressure dehydrator
JP2010110661A (en) Screw press
JP2001058107A (en) Filter press
JP4487908B2 (en) Concentrator for sludge
JP2002001589A (en) Continuous pressure dehydrator
JP4152179B2 (en) Screw press and dewatering method
JPH02151397A (en) Sludge concentrating and dehydrating device
JP2008221044A (en) Rotary pressure dehydrator
JP4081759B2 (en) Screw press
JP2011020080A (en) Apparatus for separating and dehydrating sewage sludge
JP6625255B2 (en) Solid-liquid separation device and solid-liquid separation system
JP2008149272A (en) Sludge concentration apparatus and its washing method
JP3779236B2 (en) Screw type filter dehydrator
JP5143623B2 (en) How to operate the residue separator dehydrator
JP4302240B2 (en) Filtration dehydrator with a washing device

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050720

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050720

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20071214

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20071218

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20071231

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110118

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120118

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130118

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140118

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees