JP2010240574A - Filtration plate of continuous pressure dehydrator - Google Patents
Filtration plate of continuous pressure dehydrator Download PDFInfo
- Publication number
- JP2010240574A JP2010240574A JP2009091899A JP2009091899A JP2010240574A JP 2010240574 A JP2010240574 A JP 2010240574A JP 2009091899 A JP2009091899 A JP 2009091899A JP 2009091899 A JP2009091899 A JP 2009091899A JP 2010240574 A JP2010240574 A JP 2010240574A
- Authority
- JP
- Japan
- Prior art keywords
- screen
- screens
- filter
- filtration
- outer ring
- 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
Landscapes
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
この発明は、産業排水汚泥、下水汚泥などの原液を円環状のろ過室に圧入し、羽根車と原液を供回りさせながら、ろ過板からろ液を排出して濃縮脱水する連続加圧脱水機に関し、詳しくは、連続加圧脱水機のろ過板の改良に関する。 This invention is a continuous pressure dehydrator that presses a raw solution such as industrial wastewater sludge, sewage sludge, etc. into an annular filtration chamber, discharges the filtrate from the filter plate while concentrating the impeller and the raw solution, and concentrates and dehydrates it. Specifically, the present invention relates to an improvement of a filter plate of a continuous pressure dehydrator.
従来、円盤状のろ過板とろ室外環とでろ過室を形成し、このろ過室に回転自在な羽根車を配設した連続加圧脱水機は、ろ過室の中心部から圧入した原液を羽根車で供回りさせながら、ろ過面に積層するケーキと原液との間にせん断摩擦抵抗力を発生させて脱水し、羽根車でろ過面のケーキを掻取りながらろ室外環の排出口からケーキを取出している。
そして、外周部に向かって段階的に微細孔を縮小する分割スクリーンを形成し、分割スクリーンの側縁部を溶接して脱水スクリーンを構成する連続加圧脱水機を、特許文献１でこの発明の出願人が提案している。
また、羽根車を配設したろ過室を並列し、ろ過板の内周端に止着した給液室をろ過板スペーサで連結した連続加圧脱水機も、特許文献２でこの発明の出願人が提案している。
Conventionally, a continuous pressure dehydrator in which a filter chamber is formed by a disk-shaped filter plate and a filter chamber outer ring, and a rotatable impeller is disposed in the filter chamber, the stock solution press-fitted from the center of the filter chamber is impeller. While spinning, a shear friction resistance is generated between the cake laminated on the filtration surface and the stock solution to dehydrate, and the cake is taken out from the outlet of the outer ring of the filtration chamber while scraping the cake on the filtration surface with an impeller. ing.
A continuous pressure dewatering machine that forms a dewatering screen by forming a split screen that gradually reduces the fine holes toward the outer periphery and welds the side edges of the split screen is disclosed in Patent Document 1 of Applicant has proposed.
A continuous pressure dehydrator in which filtration chambers provided with impellers are arranged in parallel and a liquid supply chamber fixed to the inner peripheral end of the filtration plate is connected by a filtration plate spacer is also disclosed in Patent Document 2 by the applicant of the present invention. Has proposed.
従来の連続加圧脱水機は円盤状のろ過面の中心部から外周部に向かって促進するろ過に応じて、微細孔を同心円環状に段階的に縮小するので、過剰な目抜けが防止できるため回収率が向上する。ケーキの含水率も低下して脱水性が向上するが、脱水スクリーンは分割スクリーンの側縁部を溶接してドーナツ状をしており、脱水スクリーンや、羽根車に止着したスクレーパの交換等のメンテナンス作業において、ろ過室を構成するろ過ユニットのろ室外環、ろ材枠、脱水スクリーン、羽根車を分解し、片端から機外に取出す必要がある。そのため、各部品の機外搬出には、吊り上げ装置、脱水機上部の搬出スペースとともに多くの人手が必要となる。また、羽根車を内設してろ過室を複数並列する連続加圧脱水機も原液の大容量処理が可能となるが、ろ過ユニットを複数並列すると、駆動機側のメンテナンスには、並列する他のろ過室の分解搬出も余儀なくされ、大変な作業となる。この発明は、脱水スクリーンを形成する複数の分割スクリーンを溶接などで接合する必要のない連続加圧脱水機のろ過板を提供する。 The conventional continuous pressure dehydrator reduces the micropores in a concentric ring shape step by step according to the filtration promoted from the central part of the disk-shaped filtration surface to the outer peripheral part. Recovery rate is improved. The moisture content of the cake also decreases and the dewaterability improves, but the dewatering screen has a donut shape by welding the side edges of the split screen, such as replacing the dewatering screen and the scraper fixed to the impeller. In the maintenance work, it is necessary to disassemble the filter chamber outer ring, filter media frame, dewatering screen, and impeller of the filtration unit constituting the filter chamber, and take them out of the machine from one end. For this reason, in order to carry out the parts out of the machine, a lot of manpower is required together with the lifting device and the carry-out space above the dehydrator. In addition, a continuous pressure dehydrator with a plurality of filtration chambers installed in parallel with an impeller can process a large volume of the stock solution. However, when a plurality of filtration units are arranged in parallel, the maintenance on the drive side can be performed in parallel. It is necessary to disassemble and carry out the filtration chamber, which is a difficult task. The present invention provides a filter plate of a continuous pressure dehydrator that does not require joining a plurality of divided screens forming a dewatering screen by welding or the like.
この発明に係る連続加圧脱水機のろ過板の要旨は、一対の円盤状のろ過板に、環状のろ室外環と、内環支持筒を連結してろ過室を形成し、ろ過室に回転自在な羽根車を配設した加圧脱水機において、外環と内環を設けた分割スクリーンの側縁部を曲折し、複数枚の分割スクリーンの側縁部を突合わせて脱水スクリーンを形成すると共に、ろ材枠に配設した脱水スクリーン補強用のパンチングメタルに複数の係合溝を半径方向に穿設し、分割スクリーンの突合わせた側縁部をパンチングメタルの係合溝に挿入させるもので、分割スクリーンの突合わせた側縁部が羽根車に衝接することがなく、脱水スクリーンを形成する分割スクリーンの位置決めと、ろ材枠への着脱が容易となる。 The gist of the filtration plate of the continuous pressure dehydrator according to the present invention is to connect a circular filter chamber outer ring and an inner ring support tube to a pair of disc-shaped filter plates to form a filtration chamber, and to rotate the filtration chamber In a pressure dehydrator provided with a free impeller, the side edges of the split screen provided with the outer ring and the inner ring are bent, and the side edges of the plurality of split screens are butted to form a dewatering screen. At the same time, a plurality of engagement grooves are formed in the punching metal for reinforcing the dewatering screen disposed in the filter medium frame in the radial direction, and the side edges of the divided screens are inserted into the engagement grooves of the punching metal. The side edges of the divided screens that are abutted do not come into contact with the impeller, so that the divided screens that form the dewatering screen can be easily positioned and attached to and removed from the filter medium frame.
ろ過室の構成は、分割スクリーンの外環と内環に設けた挿通孔を、ろ材枠の外環支持枠と内環支持枠のボルト孔に接合し、外環支持枠と内環支持枠をろ室外環と内環支持筒に螺着するもので、脱水スクリーンを形成する分割スクリーンは、外環と内環に設けた挿通孔を、ろ材枠の外環支持枠と内環支持枠のボルト孔に接合し、曲折した側縁部を突合わせるだけでろ材枠に組付けが可能となり、側縁部を溶接して脱水スクリーンを形成する必要がない。メンテナンスにおいては、羽根車、ろ室外環、ろ材枠のろ過ユニットを分解し、機上で横ずらしするだけで脱水スクリーンを形成する分割スクリーンの抜出しが可能となり、スクレーパを取り付けた羽根車では、機上でスクレーパの交換が行える。そして、分割スクリーンを、スクリーンの微細孔を中心部より外周部に向かって順次小孔とした複数枚のスクリーンで構成し、スクリーンの微細孔をろ過室側からろ液排出側に向かって拡開したもので、ろ過の進行に応じた適正な孔径の適合により、過剰な目抜けが防止でき、回収率が向上して、汚泥処理量が増加する。 The structure of the filtration chamber is such that the insertion holes provided in the outer ring and inner ring of the split screen are joined to the outer ring support frame of the filter medium frame and the bolt hole of the inner ring support frame, and the outer ring support frame and the inner ring support frame are joined. The split screen, which is screwed to the outer ring and inner ring support cylinder of the filter chamber, forms a dewatering screen, and has through holes provided in the outer ring and inner ring, and the bolts of the outer ring support frame and inner ring support frame of the filter medium frame It is possible to assemble the filter medium frame simply by joining the holes and butting the bent side edges, and it is not necessary to weld the side edges to form a dewatering screen. In maintenance, disassembling the impeller, the filter outer ring and the filter unit of the filter media frame, it is possible to pull out the split screen that forms the dewatering screen by simply shifting it on the machine. You can replace the scraper above. The split screen is composed of a plurality of screens in which the fine holes of the screen are sequentially made small holes from the center toward the outer periphery, and the fine holes of the screen are expanded from the filtration chamber side toward the filtrate discharge side. Therefore, by fitting the proper pore size according to the progress of filtration, excessive omission can be prevented, the recovery rate is improved, and the amount of sludge treatment is increased.
この発明に係る連続加圧脱水機のろ過板は上記のように構成してあり、分割スクリーンやスクレーパの交換等のメンテナンス作業において、ろ過室を構成するろ過ユニットのろ室外環、ろ材枠、脱水スクリーン、羽根車を機上で分解し、横にずらすだけで分割スクリーンを機外に取外すことができ、機上でのスクレーパの交換と分割スクリーンの取替えが容易となる。ろ過ユニットを片端から機外に取出す必要がないので、各部品の機外搬出の吊り上げ装置、脱水機上部の搬出スペースも必要としない。脱水スクリーンを形成する分割スクリーンの製作も容易となる。 The filtration plate of the continuous pressure dehydrator according to the present invention is configured as described above. In maintenance work such as replacement of a split screen and a scraper, the filter chamber outer ring, the filter medium frame, the dehydration of the filtration unit constituting the filtration chamber The screen and impeller can be disassembled on the machine, and the split screen can be removed from the machine simply by shifting to the side, making it easy to replace the scraper and replace the split screen on the machine. Since it is not necessary to take out the filtration unit from one end, the lifting device for carrying out the parts outside the machine and the carry-out space above the dehydrator are not required. It is also easy to manufacture a split screen that forms a dewatering screen.
この発明に係る連続加圧脱水機のろ過板を図面に基づき詳述すると、図１はこの発明に係る連続加圧脱水機の縦断面図であって、一対の円盤状のろ過板１、１の外周端に環状のろ室外環２が連結してあり、一対のろ過板１、１の間に円環状のろ過室４を形成してある。ろ過板１の内周端から延設した内環支持筒３の内部に給液室７を形成し、内環支持筒３の前後にろ過板スペーサ５、６を連結し、一方のろ過板スペーサ５に支架された原液の給液管８を給液室７に開口し、他方のろ過板スペーサ６に軸受９を止着し、フレーム１０に連結してある。このろ過板スペーサ６の軸受９に軸支された駆動軸１１が給液室７に延設して、ろ過室４に配設した羽根車１２を駆動軸１１に止着してある。フレーム１０に配設した駆動機１３に駆動軸１１を連動連結し、羽根車１２を回転自在としてある。 The filtration plate of the continuous pressure dehydrator according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of the continuous pressure dehydrator according to the present invention. An annular filter chamber outer ring 2 is connected to the outer peripheral end of the filter, and an annular filter chamber 4 is formed between the pair of filter plates 1 and 1. A liquid supply chamber 7 is formed inside the inner ring support tube 3 extending from the inner peripheral end of the filter plate 1, and filter plate spacers 5 and 6 are connected to the front and rear of the inner ring support tube 3, and one filter plate spacer 5 is opened to the liquid supply chamber 7, and a bearing 9 is fixed to the other filter plate spacer 6 and connected to the frame 10. A drive shaft 11 supported by a bearing 9 of the filter plate spacer 6 extends to the liquid supply chamber 7, and an impeller 12 disposed in the filtration chamber 4 is fixed to the drive shaft 11. The drive shaft 11 is interlocked and connected to a drive machine 13 disposed on the frame 10 so that the impeller 12 is rotatable.
図２はろ過板を構成する半円状に分割した分割スクリーンの正面図であって、半円状のスクリーン１４を外環１５と内環１６に止着して分割スクリーン１７を構成してある。半円状の分割スクリーン１７は、ろ過面の微細孔を中心部より外周部に向かって順次小孔とした複数枚のスクリーン１４ａ、１４ｂ、１４ｃで形成し、スクリーン１４の微細孔をろ過室４側からろ液排出側に向かって拡開してある。スクリーン１４を止着した外環１５と内環１６にボルトなどの挿通孔１８、１９・・・を開口して、外環１５の側縁部１５ａに半円状の切欠き２０を設けてある。図３及び図４は、分割スクリーンの側縁部の拡大図と縦断面図であって、側縁部１７ａは複数枚のスクリーン１４ａ、１４ｂ、１４ｃで形成するスクリーンの側縁部１４ｄと、外環１５及び内環１６の側縁部１５ａ、１６ａで構成し、曲折してある。 FIG. 2 is a front view of the semi-circular divided screen constituting the filter plate. The semi-circular screen 14 is fixed to the outer ring 15 and the inner ring 16 to form the divided screen 17. . The semicircular divided screen 17 is formed by a plurality of screens 14 a, 14 b, 14 c in which the fine pores of the filtration surface are sequentially small from the center toward the outer periphery, and the fine pores of the screen 14 are formed in the filtration chamber 4. It is expanded from the side toward the filtrate discharge side. Opening holes 18, 19... Such as bolts are opened in the outer ring 15 and the inner ring 16 to which the screen 14 is fixed, and a semicircular cutout 20 is provided in a side edge 15a of the outer ring 15. . 3 and 4 are an enlarged view and a longitudinal sectional view of the side edge portion of the split screen, and the side edge portion 17a includes a side edge portion 14d of a screen formed by a plurality of screens 14a, 14b, and 14c, and an outer side portion. It is constituted by side edges 15a and 16a of the ring 15 and the inner ring 16, and is bent.
図５は分割スクリーンの側縁部を突き合わせた脱水スクリーンの平面図であって、スクリーン１４と、外環１５及び内環１６の側縁部１４ｄ、１５ａ、１６ａを曲折して形成する、半円状の分割スクリーン１７の側縁部１７ａ、１７ａを突合せ、一対の分割スクリーン１７、１７で脱水スクリーン２１を形成してある。図６は突き合わせた分割スクリーンの外環の側縁部であって、外環１５の側縁部１５ａに穿設した半円状の切欠２０、２０でボルトなどの挿通孔を形成してある。脱水スクリーン２１に同心円環状に配列して中心部より外周部に向かって段階的に孔径を縮小する微細孔は、食品排水余剰汚泥等の低濃度の汚泥を対象とする実施例では、スクリーン１４ａ、１４ｂ，１４ｃについて、それぞれ入口濃縮部のスクリーン１４ａをφ０．６ｍｍ、中間ろ過部のスクリーン１４ｂをφ０．４ｍｍ、出口圧搾部のスクリーン１４ｃをφ０．２５ｍｍに配列してある。そして、それぞれのスクリーン１４ａ、１４ｂ，１４ｃの面積比を、中心部より外周部に向かって２：１：１に設定してある。 FIG. 5 is a plan view of the dewatering screen in which the side edges of the split screen are abutted, and is formed by bending the side edges 14d, 15a, and 16a of the screen 14 and the outer ring 15 and the inner ring 16. The side edge portions 17 a and 17 a of the split screen 17 are joined together, and a dewatering screen 21 is formed by the pair of split screens 17 and 17. FIG. 6 shows a side edge portion of the outer ring of the divided screen that is abutted, and through holes such as bolts are formed by semicircular cutouts 20 and 20 formed in the side edge portion 15 a of the outer ring 15. The micropores arranged in a concentric ring shape on the dewatering screen 21 and gradually reducing the hole diameter from the central portion toward the outer peripheral portion are screen 14a, in an embodiment targeting low-concentration sludge such as food waste surplus sludge. 14b and 14c, the screen 14a of the inlet concentrating part is arranged to φ0.6 mm, the screen 14b of the intermediate filtration part is arranged to φ0.4 mm, and the screen 14c of the outlet pressing part is arranged to φ0.25 mm. And the area ratio of each screen 14a, 14b, 14c is set to 2: 1: 1 from the center part toward the outer peripheral part.
図７は脱水スクリーンを構成する分割スクリーンの他の実施例であって、
四片に分割したスクリーン２２・・・を外環２３と内環２４に止着して扇形状の分割スクリーン２５を構成してある。スクリーン２２は、ろ過面の微細孔を中心部より外周部に向かって順次小孔とした複数枚のスクリーン２２ａ、２２ｂ、２２ｃで形成してある。四片に分割した扇形状の分割スクリーン２５・・・が、曲折した側縁部２５ａ、２５ａを突合わせて脱水スクリーン２６を形成してある。図５及び図７に示す脱水スクリーン２１、２６を形成する分割スクリーン１７、２５の外環１５、２３と内環１６、２４に挿通孔１８、２７、１９、２８が開口してある。半円状又は扇形状に分割する分割スクリーン１７、２５は、分割枚数を増加することも可能であり、分割枚数を多くすれば、大口径の脱水スクリーンを構成する分割スクリーンの微細孔の加工が容易となる。
FIG. 7 shows another embodiment of the split screen constituting the dewatering screen,
A screen 22 divided into four pieces is fastened to an outer ring 23 and an inner ring 24 to constitute a fan-shaped divided screen 25. The screen 22 is formed of a plurality of screens 22a, 22b, and 22c in which the fine holes on the filtration surface are small holes sequentially from the center toward the outer periphery. The fan-shaped divided screens 25 divided into four pieces abut the bent side edge portions 25a, 25a to form a dewatering screen 26. Insertion holes 18, 27, 19, and 28 are opened in the outer rings 15 and 23 and the inner rings 16 and 24 of the split screens 17 and 25 that form the dewatering screens 21 and 26 shown in FIGS. The divided screens 17 and 25 that are divided into semicircular or fan shapes can also be increased in the number of divisions. If the number of divisions is increased, the fine holes of the division screen constituting the large-diameter dewatering screen can be processed. It becomes easy.
図８及び図９は、脱水スクリーンの補強用のパンチングメタルを配設したろ材枠の平面図と縦断面図であって、ろ過室４側の脱水スクリーン２１、２６を支持する補強用のパンチングメタル２９が外環支持枠３０と内環支持枠３１に止着してあり、パンチングメタル２９の外方から複数の環状枠３２を止着した支持杆３３をパンチングメタル２９に当接して、外環支持枠３０と内環支持枠３１に連結し、ろ材枠３４を構成してある。パンチングメタル２９を止着した外環支持枠３０と内環支持枠３１に複数のボルト孔３５、３６・・・を穿設してある。図１０は補強用のパンチングメタルを配設したろ材枠のろ過室側の裏面図であって、ろ材枠３４の外環支持枠３０と内環支持枠３１に止着したパンチングメタル２９のろ過室４側に一対の係合溝３７、３７が半径方向に対称に配設してある。 8 and 9 are a plan view and a longitudinal sectional view of a filter medium frame in which punching metal for reinforcing the dewatering screen is disposed, and the punching metal for reinforcing that supports the dewatering screens 21 and 26 on the filtration chamber 4 side. 29 is fixed to the outer ring support frame 30 and the inner ring support frame 31, and a support rod 33 fixed to the plurality of annular frames 32 from the outside of the punching metal 29 is brought into contact with the punching metal 29, so that the outer ring A filter medium frame 34 is configured by being connected to the support frame 30 and the inner ring support frame 31. A plurality of bolt holes 35, 36... Are formed in the outer ring support frame 30 and the inner ring support frame 31 to which the punching metal 29 is fixed. FIG. 10 is a rear view of the filtration medium side of the filter medium frame provided with reinforcing punching metal, and the filtration chamber of the punching metal 29 fixed to the outer ring support frame 30 and the inner ring support frame 31 of the filter medium frame 34. A pair of engagement grooves 37, 37 are arranged symmetrically in the radial direction on the 4 side.
図１１はパンチングメタルの係合溝に分割スクリーンの側縁部を挿入させる概念図であって、ろ材枠３４に設けたパンチングメタル２９に係合溝３７が半径方向に穿設してあり、図２に示す外環１５と内環１６に支持された分割スクリーン１７の曲折した側縁部１７ａ、１７ａを突合わせ、パンチングメタル２９に穿設した係合溝３７に挿入させてろ過板１を構成する。この発明の実施例では、分割スクリーン１７は図４に示すように、スクリーン１４と外環１５及び内環１６で構成する分割スクリーン１７の略５ｍｍの側縁部１７ａを略１０度に曲折してあり、パンチングメタル２９の係合溝３７は、図１１に示すようにパンチングメタル２９の板厚が略４ｍｍ、係合溝３７の溝幅を略１３ｍｍ、溝深さ略０．８ｍｍに設定してある。 FIG. 11 is a conceptual diagram in which the side edge of the split screen is inserted into the engagement groove of the punching metal, and the engagement groove 37 is formed in the punching metal 29 provided in the filter medium frame 34 in the radial direction. The bent side edge portions 17a and 17a of the split screen 17 supported by the outer ring 15 and the inner ring 16 shown in FIG. 2 are brought into contact with each other and inserted into the engaging groove 37 formed in the punching metal 29 to constitute the filter plate 1 To do. In the embodiment of the present invention, as shown in FIG. 4, the divided screen 17 is formed by bending a side edge portion 17a of about 5 mm of the divided screen 17 constituted by the screen 14, the outer ring 15 and the inner ring 16 to about 10 degrees. Yes, the engagement groove 37 of the punching metal 29 is set so that the plate thickness of the punching metal 29 is approximately 4 mm, the groove width of the engagement groove 37 is approximately 13 mm, and the groove depth is approximately 0.8 mm, as shown in FIG. is there.
図７に示す脱水スクリーン２６を形成する四分割した分割スクリーン２５は、パンチングメタル２９に設ける係合溝３７を四方向に配設し、分割スクリーン２５の側縁部２５ａをパンチングメタル２９の係合溝３７に挿入させればろ過板１を構成できる。分割スクリーン１７、２５の曲折した側縁部１７ａ、２５ａを突合わせて脱水スクリーン２１、２６を形成し、分割スクリーン１７、２５の突合わせた側縁部１７ａ、２５ａをろ材枠３４に配設したパンチングメタル２９の係合溝３７に挿入させるので、分割スクリーン１７、２５の突合わせた側縁部１７ａ、２５ａが羽根車１２に衝接することがなく、脱水スクリーン２１、２６を形成する分割スクリーン１７、２５・・・の位置決めと、ろ材枠３４への着脱が容易となる。半円状又は扇形状に分割する分割スクリーン１７、２５の分割枚数を増加する時には、二方向又は四方向に配設するパンチングメタル２９の係合溝３７を増やせばろ材枠３４に脱水スクリーン２１、２６を張設できる。大口径の脱水スクリーンを構成する分割スクリーンの枚数を増やせば、分割スクリーンの微細孔の加工が容易となる。 In the divided screen 25 divided into four parts forming the dewatering screen 26 shown in FIG. 7, engagement grooves 37 provided in the punching metal 29 are arranged in four directions, and the side edges 25 a of the divided screen 25 are engaged with the punching metal 29. If it inserts in the groove | channel 37, the filter plate 1 can be comprised. The dewatering screens 21 and 26 are formed by abutting the bent side edges 17a and 25a of the split screens 17 and 25, and the side edges 17a and 25a of the split screens 17 and 25 are disposed in the filter medium frame 34. Since it is inserted into the engaging groove 37 of the punching metal 29, the side edges 17a, 25a of the divided screens 17, 25 abutting against the impeller 12 do not come into contact with each other, and the divided screens 17 that form the dewatering screens 21, 26 are formed. , 25... And attachment / detachment to / from the filter medium frame 34 are facilitated. When the number of divided screens 17 and 25 to be divided into a semicircular shape or a fan shape is increased, the number of engagement grooves 37 of the punching metal 29 disposed in two or four directions is increased, and the dewatering screen 21 or 26 can be stretched. If the number of divided screens constituting the large-diameter dewatering screen is increased, the fine holes of the divided screen can be easily processed.
脱水スクリーン２１とろ材枠３４で構成するろ過板１の組立ては、図２に示す半円状の分割スクリーン１７の曲折した側縁部１７ａ、１７ａを突合わせて、一対の分割スクリーン１７の側縁部１７ａ、１７ａを、図１０に示すパンチングメタル２９の係合溝３７、３７にそれぞれ挿入させれば、図５に示す脱水スクリーン２１を形成できる。図２に示す分割スクリーン１７の外環１５と内環１６に設けた挿通孔１８、１９と、図１０に示すろ材枠３４の外環支持枠３０と内環支持枠３１のボルト孔３５、３６の位置は対応しているので、それぞれの孔１８、３５及び１９、３６にボルトを螺合して、図１に示すろ室外環２と内環支持筒３に螺着すれば、連続加圧脱水機のろ過室４を構成できる。図７に示す脱水スクリーン２６を形成する扇形状の分割スクリーン２５も同様に連続加圧脱水機のろ過室４を構成できる。図１２は羽根車を配設したろ過室の正面図であって、羽根車１２の側縁をろ過板１の脱水スクリーン２１、２６に摺設させ、羽根１２ａの先端部をろ室外環２に接近させてある。この発明の実施例では、羽根車１２の羽根１２ａを折り曲げて回転方向後方に後退させてある。羽根車１２の回転方向背面の羽根１２ａに複数の補強リブ３７・・・が止着してあり、図１に示す、補強リブ３７・・・を止着した羽根車１２の基端部に原液の供給路が設けてある。原液を給液管８から給液室７に圧入して、円周方向のろ過室４に羽根車１２の補強リブ３７の基端部から流入させる。 The filter plate 1 constituted by the dewatering screen 21 and the filter medium frame 34 is assembled by abutting the bent side edges 17a and 17a of the semicircular divided screen 17 shown in FIG. If the portions 17a and 17a are inserted into the engagement grooves 37 and 37 of the punching metal 29 shown in FIG. 10, respectively, the dewatering screen 21 shown in FIG. 5 can be formed. The through holes 18 and 19 provided in the outer ring 15 and the inner ring 16 of the split screen 17 shown in FIG. 2, and the bolt holes 35 and 36 of the outer ring support frame 30 and the inner ring support frame 31 of the filter medium frame 34 shown in FIG. Therefore, if the bolts are screwed into the respective holes 18, 35 and 19, 36 and screwed into the outer ring 2 and the inner ring support cylinder 3 shown in FIG. The filtration chamber 4 of the dehydrator can be configured. The fan-shaped divided screen 25 forming the dewatering screen 26 shown in FIG. 7 can similarly constitute the filtration chamber 4 of the continuous pressure dehydrator. FIG. 12 is a front view of the filtration chamber in which the impeller is arranged. The side edge of the impeller 12 is slid on the dewatering screens 21 and 26 of the filter plate 1, and the tip of the blade 12 a is attached to the filter chamber outer ring 2. It is approached. In the embodiment of the present invention, the blade 12a of the impeller 12 is bent and moved backward in the rotational direction. A plurality of reinforcing ribs 37 are fixed to the blades 12a on the rear surface in the rotational direction of the impeller 12, and the stock solution is provided at the base end portion of the impeller 12 with the reinforcing ribs 37 fixed as shown in FIG. Supply paths are provided. The stock solution is press-fitted into the liquid supply chamber 7 from the liquid supply pipe 8 and flows into the circumferential filtration chamber 4 from the base end portion of the reinforcing rib 37 of the impeller 12.
図１及び図１１において、中心部から圧入された汚泥を後退させた基端部の羽根１２ａで外周方向に押し出し、羽根１２ａと脱水スクリーン２１、２６に囲まれたくさび状のエリアに押し込むことで圧搾作用を発生させ、脱水スクリーン２１、２６の微細孔からろ液を分離して濃縮脱水する。羽根車１２の羽根１２ａに止着したスクレーパが脱水スクリーン２１、２６に摺接しながら回転し、脱水スクリーン２１、２６に形成したケーキ層を掻取り、ケーキを搬送しながら脱水スクリーン２１、２６のろ過面を再生する。ろ過室４のろ室外環２の近傍では、羽根１２ａの回転クサビ作用とケーキを半径方向へ湾曲流動させる力が増大し、ケーキに大きなせん断力が加えられ、ケーキの含水率が低下する。図１２に示すように、ろ室外環２に設けたケーキの排出口３８が下側横向きに配設してあり、排出口３８には、エアーシリンダー３９で開閉させるフラップ弁４０が設けてあり、ろ過室４の排出口３８の開度を調整して、ろ過室４における原液に対する加圧力を発生させる。 In FIG. 1 and FIG. 11, the sludge that is press-fitted from the central portion is pushed outward by the blade 12 a at the proximal end, and pushed into the wedge-shaped area surrounded by the blade 12 a and the dewatering screens 21 and 26. A pressing action is generated, and the filtrate is separated from the fine holes of the dewatering screens 21 and 26 and concentrated and dehydrated. The scraper fixed to the blade 12a of the impeller 12 rotates while sliding on the dewatering screens 21 and 26, scrapes the cake layer formed on the dewatering screens 21 and 26, and filters the dewatering screens 21 and 26 while conveying the cake. Play the face. In the vicinity of the outer ring 2 of the filtration chamber 4, the rotational wedge action of the blades 12 a and the force that causes the cake to bend and flow in the radial direction increase, a large shearing force is applied to the cake, and the moisture content of the cake decreases. As shown in FIG. 12, a cake discharge port 38 provided in the outer ring 2 of the filter chamber is disposed laterally downward, and a flap valve 40 that is opened and closed by an air cylinder 39 is provided in the discharge port 38. The opening of the discharge port 38 of the filtration chamber 4 is adjusted to generate a pressure applied to the stock solution in the filtration chamber 4.
磨耗した脱水スクリーン２１、２６や羽根車１２に止着したスクレーパを交換する時には、ろ材枠３４の外環支持枠３０と内環支持枠３１のボルト孔３５、３６からボルトを抜き出して、図１に示すろ室外環２と内環支持筒３からろ材枠３４と脱水スクリーン２１、２６を解離して、内環支持筒３とろ過板スペーサ５に摺接させながら横にずらせれば、脱水スクリーン２１、２６を形成する分割スクリーン１７、２５の抜出しが可能となり、羽根車に取り付けたスクレーパの交換が機上で行える。脱水スクリーンを形成する分割スクリーンは、ろ過面の微細孔を中心部より外周部に向かって順次小孔とした複数枚のスクリーンで構成し、スクリーンの微細孔をろ過室側からろ液排出側に向かって拡開したので、ろ過の進行に応じた適正な孔径の適合により、過剰な目抜けが防止でき、回収率が向上して、汚泥処理量が増加する。ろ過室４を構成するろ室外環２、ろ材枠３４、脱水スクリーン２１、２６及び羽根車１２のろ過ユニットを機上で分解することが可能となり、片端から機外に取出す必要がなく、各部品の機外搬出の吊り上げ装置、脱水機上部の搬出スペースも必要としない。 When the worn dewatering screens 21 and 26 and the scraper fixed to the impeller 12 are replaced, bolts are extracted from the outer ring support frame 30 of the filter medium frame 34 and the bolt holes 35 and 36 of the inner ring support frame 31, as shown in FIG. The filter medium frame 34 and the dewatering screens 21 and 26 are dissociated from the outer ring 2 and the inner ring support cylinder 3 shown in FIG. The split screens 17 and 25 that form 21 and 26 can be extracted, and the scraper attached to the impeller can be replaced on the machine. The split screen that forms the dewatering screen is composed of a plurality of screens in which the fine pores of the filtration surface are made small in order from the center to the outer periphery, and the fine pores of the screen are moved from the filtration chamber side to the filtrate discharge side. Since it has expanded toward the top, by adapting the appropriate pore size according to the progress of the filtration, it is possible to prevent excessive voids, improve the recovery rate, and increase the amount of sludge treatment. It is possible to disassemble the filtration unit of the filter chamber outer ring 2, the filter medium frame 34, the dewatering screens 21 and 26 and the impeller 12 constituting the filtration chamber 4 on the machine, and it is not necessary to take out from one end of the machine. There is no need for a lifting device for carrying out the machine and a carrying-out space above the dehydrator.
本発明に係わる連続加圧脱水機のろ過板は、脱水スクリーンを形成する分割スクリーンの曲折した側縁部を突合わせ、ろ材枠の係合溝に穿設した係合溝に挿入させるだけで、側縁部を溶接して脱水スクリーンを形成する必要がなく、ろ過ユニットのろ室外環、ろ材枠、脱水スクリーン、羽根車を機上で分解して横にずらすだけで分割スクリーンの抜出しが可能となる。各部品の機外搬出の吊り上げ装置、脱水機上部の搬出スペースも必要とせず、分割スクリーンの製作も容易となる。そして、脱水スクリーンの微細孔を同心円環状に配列し、中心部より外周部に向かって孔径を縮小したので、過剰な目抜けが防止できるため回収率が向上する。ケーキの含水率も低下して脱水性が向上する。従って、この発明に係る連続加圧脱水機のろ過板は、下水汚泥や食品排水余剰汚泥、し尿汚泥等を濃縮加圧脱水する連続加圧脱水機に最適となる。 The filtration plate of the continuous pressure dehydrator according to the present invention is such that the bent side edge portion of the split screen forming the dewatering screen is abutted and inserted into the engagement groove formed in the engagement groove of the filter medium frame. There is no need to form a dewatering screen by welding the side edges, and the split screen can be removed simply by disassembling the filter unit outer ring, filter media frame, dewatering screen, and impeller on the machine and shifting them sideways. Become. A lifting device for unloading each part and an unloading space at the top of the dehydrator are not required, and a split screen can be easily manufactured. Since the fine holes of the dewatering screen are arranged concentrically and the hole diameter is reduced from the central part toward the outer peripheral part, excessive voids can be prevented and the recovery rate is improved. The moisture content of the cake is also reduced and the dewaterability is improved. Therefore, the filter plate of the continuous pressure dehydrator according to the present invention is optimal for a continuous pressure dehydrator that concentrates and dehydrates sewage sludge, food waste surplus sludge, human waste sludge and the like.
１ ろ過板
２ ろ室外環
３ 内環支持筒
４ ろ過室
１２ 羽根車
１４ａ、１４ｂ、１４ｃ、２２ａ、２２ｂ、２２ｃ スクリーン
１５、２３ 外環
１６、２４ 内環
１７、２５ 分割スクリーン
１７ａ、２５ａ 側縁部
１８、１９、２７、２８ 挿通孔
２１、２６ 脱水スクリーン
２９ パンチングメタル
３０ 外環支持枠
３１ 内環支持枠
３４ ろ材枠
３５、３６ ボルト孔
３７ 係合溝
DESCRIPTION OF SYMBOLS 1 Filter plate 2 Filter chamber outer ring 3 Inner ring support cylinder 4 Filtration chamber 12 Impeller 14a, 14b, 14c, 22a, 22b, 22c Screen 15, 23 Outer ring 16, 24 Inner ring 17, 25 Split screen 17a, 25a Side edge Portions 18, 19, 27, 28 Insertion holes 21, 26 Dewatering screen 29 Punching metal 30 Outer ring support frame 31 Inner ring support frame 34 Filter medium frame 35, 36 Bolt hole 37 Engagement groove
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009091899A JP5013221B2 (en) | 2009-04-06 | 2009-04-06 | Continuous pressure dehydrator filter plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009091899A JP5013221B2 (en) | 2009-04-06 | 2009-04-06 | Continuous pressure dehydrator filter plate |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2010240574A true JP2010240574A (en) | 2010-10-28 |
| JP2010240574A5 JP2010240574A5 (en) | 2011-05-19 |
| JP5013221B2 JP5013221B2 (en) | 2012-08-29 |
Family
ID=43094245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009091899A Expired - Fee Related JP5013221B2 (en) | 2009-04-06 | 2009-04-06 | Continuous pressure dehydrator filter plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5013221B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103432800A (en) * | 2013-08-20 | 2013-12-11 | 翟志国 | Filtering screen type filter element |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004167543A (en) * | 2002-11-20 | 2004-06-17 | Ishigaki Co Ltd | Continuous pressure dehydrator |
| JP2006346530A (en) * | 2005-06-14 | 2006-12-28 | Ishigaki Co Ltd | Sheet metal filter medium for solid-liquid separation and continuous pressure dehydrator using it |
| JP2008104951A (en) * | 2006-10-25 | 2008-05-08 | Kobelco Eco-Solutions Co Ltd | Rotary pressure dehydrator and dehydration method of sludge by the same |
| JP2009000718A (en) * | 2007-06-21 | 2009-01-08 | Kobelco Eco-Solutions Co Ltd | Rotary pressure dehydrator |
-
2009
- 2009-04-06 JP JP2009091899A patent/JP5013221B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004167543A (en) * | 2002-11-20 | 2004-06-17 | Ishigaki Co Ltd | Continuous pressure dehydrator |
| JP2006346530A (en) * | 2005-06-14 | 2006-12-28 | Ishigaki Co Ltd | Sheet metal filter medium for solid-liquid separation and continuous pressure dehydrator using it |
| JP2008104951A (en) * | 2006-10-25 | 2008-05-08 | Kobelco Eco-Solutions Co Ltd | Rotary pressure dehydrator and dehydration method of sludge by the same |
| JP2009000718A (en) * | 2007-06-21 | 2009-01-08 | Kobelco Eco-Solutions Co Ltd | Rotary pressure dehydrator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103432800A (en) * | 2013-08-20 | 2013-12-11 | 翟志国 | Filtering screen type filter element |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5013221B2 (en) | 2012-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4702607B2 (en) | Continuous pressure dehydrator using sheet metal filter media | |
| JP6708975B2 (en) | Clogging prevention device for screw press | |
| JP4051395B1 (en) | Rotary pressure dehydrator | |
| JP4953089B2 (en) | Continuous dehydration filtration equipment | |
| JP5013221B2 (en) | Continuous pressure dehydrator filter plate | |
| JP4702358B2 (en) | Screw press with concentration mechanism | |
| JP2010058028A (en) | Screw press and method of exchanging screen of screw press | |
| JP6271069B1 (en) | Solid-liquid separator | |
| JP4687896B2 (en) | Sludge concentrator | |
| JP2010240574A5 (en) | ||
| CN201250164Y (en) | Screw extrusion type sludge dewatering equipment | |
| JP2012035285A (en) | Device and method of fixing divided outer cylinder screen in screw press | |
| JP2008104951A (en) | Rotary pressure dehydrator and dehydration method of sludge by the same | |
| JP5318555B2 (en) | Rotating pressure dehydrator and sludge dewatering method using rotating pressure dehydrator | |
| JP5071820B2 (en) | Rotary concentrator outer cylinder screen | |
| JP6618554B2 (en) | Sector with progressive thickness | |
| JP4493030B2 (en) | Filtration device | |
| JP4370772B2 (en) | Continuous pressure dehydrator | |
| JP4820784B2 (en) | Rotating pressure dehydrator and sludge dewatering method using rotating pressure dehydrator | |
| JP2012176411A (en) | Screw press | |
| JP4623667B2 (en) | Filtration device | |
| JP4546954B2 (en) | High dehydration type rotary pressure dehydrator | |
| JP2020011188A (en) | Method for use of solid-liquid separator and solid-liquid separator | |
| CN213446767U (en) | Novel dehydration assembly of sludge dehydrator | |
| JP2019076933A (en) | Screen of screw press |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110401 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110401 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20111024 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20111102 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20111117 |
|
| 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: 20120510 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120523 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150615 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |