JP4051394B1 - Rotary pressure dehydrator - Google Patents

Rotary pressure dehydrator Download PDF

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JP4051394B1
JP4051394B1 JP2007164032A JP2007164032A JP4051394B1 JP 4051394 B1 JP4051394 B1 JP 4051394B1 JP 2007164032 A JP2007164032 A JP 2007164032A JP 2007164032 A JP2007164032 A JP 2007164032A JP 4051394 B1 JP4051394 B1 JP 4051394B1
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filter plate
spacer
scraper
ring spacer
rotary pressure
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JP2009000627A (en
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志朗 豊久
武男 吉ヶ江
隆英 ▲高▼田
芳夫 土井長
仁志 小久江
朋弘 佐藤
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Shinko Pantec Co Ltd
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Kobelco Eco Solutions Co Ltd
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Abstract

【課題】配設数が少なく、簡単な構成であるにもかかわらず、ろ過板の全幅に亘って確実に接触して、ろ過板の表面に付着した汚泥中の微粒子塊や脱水ケーキ片を掻取ることができる構造が簡単なスクレーパを備えた回転加圧脱水機を提供する。
【解決手段】 回転加圧脱水機1の脱水処理室11内に設けられ、第1ろ過板7と第2ろ過板8の内側面に付着した汚泥中の微粒子塊や脱水ケー片を掻取るスクレーパ11dの一端側を皿小ネジによって外輪スペーサの側面に締結すると共に、他端側を皿小ネジによって、第1ろ過板支持ボスと第2ろ過板支持ボスと共にボス部材3を構成するスペーサ支持ボスに外嵌した内輪スペーサ4の側面に締結して、スクレーパ11dの両端を固定する構成とする。
【選択図】図1
[PROBLEMS] To reduce the number of particles and dehydrated cake pieces in sludge adhered to the surface of the filter plate by reliably contacting the entire width of the filter plate despite the small number of arrangements and the simple configuration. A rotary pressure dehydrator provided with a scraper with a simple structure that can be taken.
A scraper is provided in a dehydration treatment chamber 11 of a rotary pressure dehydrator 1 and scrapes off a fine particle lump and dehydrated cake pieces in sludge adhering to the inner side surfaces of a first filter plate 7 and a second filter plate 8. A spacer support boss that constitutes the boss member 3 together with the first filter plate support boss and the second filter plate support boss by fastening one end side of 11d to the side surface of the outer ring spacer with a countersunk screw and the other end side using a countersunk screw The scraper 11d is fastened to the side surface of the inner ring spacer 4 that is externally fitted to the scraper 11d.
[Selection] Figure 1

Description

本発明は、産業排水汚泥、下水汚泥等の汚泥を、少なくとも幅方向の一方側に、多数の水透過穴が設けられてなるろ過面を有する円盤状のろ過板を備えた脱水処理室内に供給し、汚泥を円盤状のろ過板の回転に追随させて回転させながら、ろ過板によりろ過液をろ過して濃縮脱水する回転加圧脱水機に関するものである。   The present invention supplies sludge such as industrial wastewater sludge and sewage sludge into a dehydration chamber equipped with a disk-shaped filter plate having a filtration surface provided with a large number of water permeation holes on at least one side in the width direction. In addition, the present invention relates to a rotary pressure dehydrator that filters and concentrates and dehydrates the filtrate with a filter plate while rotating the sludge following the rotation of the disk-shaped filter plate.

産業排水汚泥、下水汚泥等の汚泥を濃縮脱水する脱水機の中に、例えば回転加圧脱水機がある。以下、従来例に係る典型的な回転加圧脱水機の2従来例を説明する。先ず、従来例1に係る回転加圧脱水機を、その要部拡大図の図7を参照しながら説明する。この回転加圧脱水機51は、内輪スペーサ53、外輪スペーサ54、スクリーン(以下、ろ過板という)55の他、回転軸(駆動軸に相当する)、隔壁板、外部ケーシング、駆動装置、制御装置等によって構成されている。また、この回転加圧脱水機51の外輪スペーサ54には、多数のスクレーパ64が取付けられており、所定方向(図6中における反時計回り方向の矢印R方向)へ回転するろ過板55の内側面に付着した処理原液中の微粒子塊を掻取るように構成されている。   Among the dehydrators that concentrate and dewater sludge such as industrial wastewater sludge and sewage sludge, for example, there is a rotary pressure dehydrator. Hereinafter, two conventional examples of typical rotary pressure dehydrators according to the conventional example will be described. First, a rotary pressurizing dehydrator according to Conventional Example 1 will be described with reference to FIG. The rotary pressure dehydrator 51 includes an inner ring spacer 53, an outer ring spacer 54, a screen (hereinafter referred to as a filter plate) 55, a rotation shaft (corresponding to a drive shaft), a partition plate, an outer casing, a drive device, and a control device. Etc. are constituted. Further, a large number of scrapers 64 are attached to the outer ring spacer 54 of the rotary pressurizing dehydrator 51, and the inner part of the filter plate 55 that rotates in a predetermined direction (the counterclockwise arrow R direction in FIG. 6). It is comprised so that the fine particle lump in the processing stock solution adhering to the side may be scraped off.

より具体的には、これらスクレーパ64は、その先端部64bが内輪スペーサ53の方を指向するような向きで、基端部64cが外輪スペーサ54の側面に固定されることによって取付けられている。そして、このスクレーパ64のエッジ64aがろ過板55の内側面に対して鋭角的に接触することにより、このろ過板55の表面に付着した処理原液(汚泥)中の微粒子塊や脱水ケーキ片を掻取るように構成されている。   More specifically, the scrapers 64 are attached by fixing the base end portion 64 c to the side surface of the outer ring spacer 54 with the tip end portion 64 b pointing toward the inner ring spacer 53. Then, the edge 64a of the scraper 64 makes an acute contact with the inner surface of the filter plate 55, thereby scraping the fine particle mass and dehydrated cake pieces in the processing stock solution (sludge) adhering to the surface of the filter plate 55. Is configured to take.

前記スクレーパ64は、外輪スペーサ54の二つの側面に、それぞれ12枚ずつ(両側で合計24枚である)取付けられており、しかも初期ろ過ゾーンQ1(原料供給口58から、約120〜140°の範囲のゾーン)の全体に亘って密に(外輪スペーサ54の一方の側面において、隣り合うスクレーパ64,64同士の間隔Sが、一つのスクレーパ64の幅寸法Wより小さくなる程度に)配設されているために、全脱水工程においてろ過板55の表面に付着した脱水ケーキ片を掻取るだけでなく、このろ過板55の表面に付着した処理原液(汚泥)中の微粒子塊をも好適に掻取り、このろ過板55が脱水ケーキ片や微粒子塊によって覆われてしまうという事態を、初期ろ過ゾーンQ1全体において回避することができる(例えば、特許文献1参照。)。   The scraper 64 is attached to each of the two side surfaces of the outer ring spacer 54 by 12 pieces (a total of 24 pieces on both sides), and the initial filtration zone Q1 (about 120 to 140 ° from the raw material supply port 58). (The zone of the range) is densely arranged (so that the interval S between the adjacent scrapers 64 on one side surface of the outer ring spacer 54 is smaller than the width dimension W of one scraper 64). Therefore, not only the dehydrated cake pieces adhering to the surface of the filter plate 55 in the entire dehydration process are scraped, but also the fine particle mass in the processing stock solution (sludge) adhering to the surface of the filter plate 55 is suitably scraped. And the situation where the filter plate 55 is covered with the dehydrated cake pieces and the fine particle lump can be avoided in the entire initial filtration zone Q1 (for example, Patent Literature 1). Reference.).

次に、従来例2に係る回転加圧脱水機を、その内部構造を示す側面図の図8を参照しながら説明する。この従来例2に係る回転加圧脱水機71は、回転軸72、内輪スペーサ73、外輪スペーサ74、ろ過板75a,75b、およびデフレクタ(仕切りスペーサに相当する)76の他に、隔壁板、外部ケーシング、駆動装置、および制御装置等から構成されている。また、この回転加圧脱水機71の外輪スペーサ74の両側面に、ショートスクレーパ85(85a〜85f)がそれぞれ3枚ずつ(両側で合計6枚である)取付けられている。これらショートスクレーパ85のエッジは、ろ過板75の内側面に対して鋭角的に接触するようになっており、所定方向(図7中における反時計回り方向の矢印R方向)へ回転するろ過板75(75a,75b)の内側面に付着した微粒子塊を掻取るように構成されている。   Next, the rotary pressure dehydrator according to Conventional Example 2 will be described with reference to FIG. 8 which is a side view showing the internal structure. The rotary pressure dehydrator 71 according to the conventional example 2 includes a partition plate, an outer ring spacer 72, an inner ring spacer 73, an outer ring spacer 74, filter plates 75a and 75b, and a deflector (corresponding to a partition spacer) 76. It is comprised from a casing, a drive device, a control apparatus, etc. Further, three short scrapers 85 (85a to 85f) are attached to both side surfaces of the outer ring spacer 74 of the rotary pressurizing dehydrator 71 (total of six on both sides). The edges of these short scrapers 85 are in acute contact with the inner surface of the filter plate 75, and the filter plate 75 rotates in a predetermined direction (counterclockwise arrow R direction in FIG. 7). (75a, 75b) is configured to scrape the fine particle lump attached to the inner side surface.

なお、前記ショートスクレーパ85と原液供給口78との間に、通常の長さのスクレーパ(先端が内輪スペーサ73の直近まで達し、ろ過板75a,75bの内側面に付着した微粒子塊を全幅的に掻取るスクレーパ)を配設した実施の形態に係る回転加圧脱水機や、ショートスクレーパと通常の長さのスクレーパとを交互に配設した実施の形態に係る回転加圧脱水機も開示されている(例えば、特許文献2参照。)。
特開2004−291036号公報 特開2006−341258号公報
It should be noted that a scraper of a normal length (the tip of the scraper 85 reaches the immediate vicinity of the inner ring spacer 73 and the fine particle mass adhering to the inner side surfaces of the filter plates 75a and 75b is completely removed between the short scraper 85 and the stock solution supply port 78. Also disclosed is a rotary pressure dehydrator according to an embodiment in which a scraper is disposed, and a rotary pressure dehydrator according to an embodiment in which short scrapers and normal length scrapers are alternately disposed. (For example, refer to Patent Document 2).
JP 2004-291036 A JP 2006-341258 A

上記従来例に係る回転加圧脱水機によれば、スクレーパによってろ過板の内側面に付着した処理原液中の微粒子塊や脱水ケーキ片を掻取ることができ、良好なろ過効率を維持することができるので、極めて優れていると考えられる。しかしながら、上記のとおり、スクレーパは、その基端側が外輪スペーに固着され、先端側がフリーの片持ち支持構成であって撓むために、ろ過板の回転中心側の表面に付着した処理原液中の微粒子塊や脱水ケーキ片を掻取って完全に除去することが困難で、十分なろ過機能をろ過板の全幅に亘って確保することができない。換言すれば、十分なろ過機能をろ過板の全幅に亘って確保するためには、より多数のスクレーパを設けなければならず、回転加圧脱水機の構造が複雑になる結果、回転加圧脱水機自体が高コストになってしまう。また、より多数のスクレーパを設ける関係上、スクレーパを先細り構成にしなければならず、構成が複雑であるため、スクレーパ自体もまた回転加圧脱水機のコストアップの要因になっている。   According to the rotary pressure dehydrator according to the above conventional example, the lump of fine particles and the dehydrated cake pieces in the processing stock solution adhering to the inner surface of the filter plate can be scraped by the scraper, and good filtration efficiency can be maintained. It can be considered excellent because it is possible. However, as described above, the scraper has a base end side fixed to the outer ring space, and a tip end side is a free cantilever support structure and bends. Therefore, a fine particle lump in the processing stock solution adhered to the surface of the rotation center side of the filter plate. It is difficult to completely remove the dehydrated cake piece by scraping, and a sufficient filtration function cannot be secured over the entire width of the filter plate. In other words, in order to ensure a sufficient filtration function over the entire width of the filter plate, a larger number of scrapers must be provided, and the structure of the rotary pressure dehydrator becomes complicated. The machine itself becomes expensive. In addition, since the scraper has to be tapered in order to provide a larger number of scrapers, the configuration is complicated, so the scraper itself is also a factor in increasing the cost of the rotary pressure dehydrator.

従って、本発明の目的は、配設数が少なく、簡単な構成であるにもかかわらず、ろ過板の全幅に亘って確実に接触して、ろ過板の表面に付着した汚泥中の微粒子塊や脱水ケーキ片を良好に掻取ることができる構造が簡単なスクレーパを備えた回転加圧脱水機を提供することである。   Accordingly, the object of the present invention is to make sure that the number of particles in the sludge adhered to the surface of the filter plate is surely contacted over the entire width of the filter plate despite the fact that the number of arrangements is small and the structure is simple. An object of the present invention is to provide a rotary pressure dehydrator equipped with a scraper having a simple structure capable of scraping off dehydrated cake pieces well.

発明者等は、スクレーパをろ過板の全幅に亘って確実に接触させるためには、スクレーパ両端を固定すれば良い。また、スクレーパをろ過板の全幅に亘って確実に接触させることができれば、スクレーパの配設数を少なくすることができ、スクレーパの配設数が少なければスクレーパの全長に渡る幅寸法を同一にしても、配設に何ら支障が生じるようなことがないと考えて、本発明を具現するに至ったものである。   The inventors only have to fix both ends of the scraper in order to ensure that the scraper contacts the entire width of the filter plate. If the scraper can be reliably contacted over the entire width of the filter plate, the number of scrapers disposed can be reduced. If the number of scrapers disposed is small, the width dimension over the entire length of the scraper is made the same. However, the present invention has been realized by considering that there is no problem in the arrangement.

従って、上記課題を解決するために、本発明の請求項1に係る回転加圧脱水機が採用した手段は、水平な駆動軸により回転され、少なくとも幅方向の一方側に、多数の水透過穴を有し、外端縁付近の側面が外輪スペーサの側面に摺接する円盤状のろ過板を備えた脱水処理室が設けられ、この脱水処理室内に汚泥を供給する汚泥供給部と、脱水ケーキを排出する脱水ケーキ排出部が設けられると共に、前記ろ過板の前記脱水処理室内側の側面に鋭角的に接触するスクレーパが設けられてなる回転加圧脱水機において、前記スクレーパの一端側が前記外輪スペーサ側に固定されると共に、前記駆動軸の外周部に、前記ろ過板の回転中心側の側面が摺接する側面を有し、前記ろ過板の回転を許容する環状の内輪スペーサが設けられ、前記内輪スペーサ側に前記スクレーパの他端側が固定されてなることを特徴とするものである。 Therefore, in order to solve the above-mentioned problem, the means adopted by the rotary pressurization dehydrator according to claim 1 of the present invention is rotated by a horizontal drive shaft and has a plurality of water permeable holes at least on one side in the width direction. A dewatering chamber having a disc-shaped filter plate whose side surface near the outer edge is in sliding contact with the side surface of the outer ring spacer, and a sludge supply section for supplying sludge into the dewatering chamber, and a dehydrated cake. In the rotary pressure dehydrator provided with a dewatering cake discharging unit for discharging, and a scraper that is in acute contact with the side surface of the filter plate on the dehydration processing chamber side, one end side of the scraper is on the outer ring spacer side is fixed to the outer peripheral portion of the drive shaft, have a side that the rotational center side of the side surface of the filter plate is in sliding contact with an annular inner spacer to permit rotation of the filter plate is provided, the inner ring space It is characterized in that the other end of the scraper on the side is fixed.

本発明の請求項2に係る回転加圧脱水機が採用した手段は、請求項1に記載の回転加圧脱水機において、前記駆動軸にボス部材が外嵌され、このボス部材は、前記円盤状のろ過板を回転させるろ過板支持ボスと、前記内輪スペーサが滑り軸受を介して外嵌されるスペーサ支持ボスとが締結手段により一体的に締結されてなることを特徴とするものである。   The rotary pressure dehydrator according to claim 2 of the present invention employs a rotary pressurization dehydrator according to claim 1, wherein a boss member is externally fitted to the drive shaft, and the boss member is the disc. A filter plate support boss for rotating the filter plate and a spacer support boss on which the inner ring spacer is fitted through a slide bearing are integrally fastened by fastening means.

本発明の請求項3に係る回転加圧脱水機が採用した手段は、請求項1または2のうちの何れか一つの項に記載の回転加圧脱水機において、前記汚泥供給部と前記脱水ケーキ排出部とを仕切る仕切りスペーサが設けられ、前記内輪スペーサは、前記仕切りスペーサと一体的に構成されてなることを特徴とするものである。   The rotary pressure dehydrator according to claim 3 of the present invention employs the rotary pressure dehydrator according to any one of claims 1 and 2, wherein the sludge supply unit and the dewatered cake A partition spacer for partitioning the discharge portion is provided, and the inner ring spacer is formed integrally with the partition spacer.

本発明の請求項4に係る回転加圧脱水機が採用した手段は、請求項1乃至3のうちの何れか一つの項に記載の回転加圧脱水機において、前記スクレーパの幅寸法は、全長に亘って同幅寸法に設定されてなることを特徴とするものである。   The rotary pressure dehydrator according to claim 4 of the present invention employs the rotary pressure dehydrator according to any one of claims 1 to 3, wherein the width dimension of the scraper is the total length. It is characterized in that it is set to the same width dimension.

本発明の請求項1乃至4に係る回転加圧脱水機では、脱水処理室を構成する円盤状のろ過板の脱水処理室内側の側面に鋭角的に接触するスクレーパの一端側が外輪スペーサ側に固定されている。また、前記スクレーパの他端側が環状の内輪スペーサ側に固定されている。従って、本発明の請求項1乃至4に係る回転加圧脱水機によれば、スクレーパをろ過板の全幅に亘って確実に接触させることができるため、スクリーンに付着した汚泥を確実に掻き取ることができ、脱水効率が向上すると共に、スクレーパの配設数を少なくすることができ、回転加圧脱水機の構成の簡単化とコスト低減とに対して大いに寄与することができる。   In the rotary pressure dehydrator according to the first to fourth aspects of the present invention, one end side of the scraper that is in acute contact with the side surface on the dehydration treatment chamber side of the disc-shaped filter plate constituting the dehydration treatment chamber is fixed to the outer ring spacer side. Has been. The other end side of the scraper is fixed to the annular inner ring spacer side. Therefore, according to the rotary pressure dehydrator according to claims 1 to 4 of the present invention, since the scraper can be reliably brought into contact with the entire width of the filter plate, the sludge adhering to the screen is surely scraped off. Thus, the dewatering efficiency can be improved and the number of scrapers can be reduced, which can greatly contribute to the simplification of the configuration of the rotary pressure dehydrator and the cost reduction.

また、本発明の請求項1乃至4に係る回転加圧脱水機では、一端側が外輪スペーサ側に固定されたスクレーパの他端側が内輪スペーサ側に固定されているから、内輪スペーサは従来例に係る内輪スペーサのように回転するようなことはない。従って、本発明の請求項1乃至4に係る回転加圧脱水機によれば、外輪スペーサの内周面に接触する脱水ケーキと同様に、内輪スペーサの外周面に接触する脱水ケーキはろ過板の回転力により内輪スペーサの外周面を滑って移動するため、汚泥の脱水処理に支障が生じるようなことがない。   In the rotary pressure dehydrator according to claims 1 to 4 of the present invention, since the other end side of the scraper whose one end side is fixed to the outer ring spacer side is fixed to the inner ring spacer side, the inner ring spacer is related to the conventional example. It does not rotate like an inner ring spacer. Therefore, according to the rotary pressure dehydrator according to claims 1 to 4 of the present invention, the dewatering cake that contacts the outer peripheral surface of the inner ring spacer is the filter plate as well as the dewatering cake that contacts the inner peripheral surface of the outer ring spacer. Since the outer ring surface of the inner ring spacer is slid and moved by the rotational force, the sludge dewatering process is not hindered.

本発明の請求項2に係る回転加圧脱水機では、駆動軸に外嵌されるボス部材は、円盤状のろ過板を回転させるろ過板支持ボスと、内輪スペーサが滑り軸受を介して外嵌されるスペーサ支持ボスとが締結手段により一体的に締結されている。従って、本発明の請求項2に係る回転加圧脱水機によれば、スペーサ支持ボスに滑り軸受を介して内輪スペーサを外嵌した後に、締結手段によりろ過板支持ボスとスペーサ支持ボスとを一体的に締結することにより、内輪スペーサを容易に脱水処理室内に位置させることができる。   In the rotary pressure dehydrator according to claim 2 of the present invention, the boss member fitted on the drive shaft includes a filter plate support boss for rotating the disk-shaped filter plate, and an inner ring spacer through the slide bearing. The spacer support boss is integrally fastened by fastening means. Therefore, according to the rotary pressure dehydrator according to claim 2 of the present invention, after the inner ring spacer is externally fitted to the spacer support boss via the slide bearing, the filter plate support boss and the spacer support boss are integrated by the fastening means. The inner ring spacer can be easily positioned in the dehydration processing chamber by fastening in place.

本発明の請求項3に係る回転加圧脱水機によれば、汚泥供給部と前記脱水ケーキ排出部とを仕切る仕切りスペーサが設けられ、内輪スペーサは、仕切りスペーサと一体的に構成されているから、脱水ケーキの移動に伴う内輪スペーサの回転力の一部が仕切りスペーサによって受け持たれるため、スクレーパの強度を上記請求項1の場合よりも低強度にすることができる。従って、スクレーパを安価、かつ容易に製造することができる。   According to the rotary pressure dehydrator according to claim 3 of the present invention, the partition spacer that partitions the sludge supply unit and the dewatered cake discharge unit is provided, and the inner ring spacer is configured integrally with the partition spacer. Since a part of the rotational force of the inner ring spacer accompanying the movement of the dewatered cake is received by the partition spacer, the strength of the scraper can be made lower than that in the case of the first aspect. Therefore, the scraper can be manufactured inexpensively and easily.

本発明の請求項4に係る回転加圧脱水機によれば、スクレーパの幅寸法は、全長に亘って同幅寸法に設定されている。従って、先細りの構成になる従来例のスクレーパよりも構成が簡単で加工工数が少ないから、スクレーパを安価に製造することができる。   According to the rotary pressure dehydrator according to claim 4 of the present invention, the width dimension of the scraper is set to the same width dimension over the entire length. Accordingly, the scraper can be manufactured at a low cost because the configuration is simpler and the number of processing steps is smaller than that of the conventional scraper having a tapered configuration.

以下、本発明の実施の形態1に係る回転加圧脱水機を、添付図面を順次参照しながら説明する。図1は本発明の実施の形態1に係り、カバーの一部を切欠いて示す回転加圧脱水機の概略構成を示す一部省略側面図、図2は図1のA−A線断面図、図3は図2のB部拡大図、図4(a)は外輪スペーサへのスクレーパの取り付け状態説明図、図4(b)は図4(a)のC矢視図である。   Hereinafter, a rotary pressurizing dehydrator according to Embodiment 1 of the present invention will be described with reference to the attached drawings. 1 is a partially omitted side view showing a schematic configuration of a rotary pressurizing dehydrator according to Embodiment 1 of the present invention, with a part of a cover cut away, and FIG. 2 is a sectional view taken along line AA in FIG. 3 is an enlarged view of a portion B in FIG. 2, FIG. 4 (a) is an explanatory view of a state in which the scraper is attached to the outer ring spacer, and FIG.

図に示す符号1は、本発明の実施の形態1に係る回転加圧脱水機である。この回転加圧脱水機1は、図示しない減速機付の駆動装置により0.5〜1.3rpmの回転速度で回転される駆動軸2を備えている。この駆動軸2には、この駆動軸2の回転によりキー2aを介して回転され、後述する第1ろ過板と第2ろ過板とを回転させるボス部材3が嵌着されている。このボス部材3は、第1ろ過板支持ボス31と、第2ろ過板支持ボス32と、これら第1ろ過板支持ボス31と第2ろ過板支持ボス32との間に介装されるスペーサ支持ボス33と、これらを一体的に締結する締結ボルト、ナット、ワッシャとからなる機械的締結手段34とから構成されている。   Reference numeral 1 shown in the figure is a rotary pressure dehydrator according to Embodiment 1 of the present invention. The rotary pressure dehydrator 1 includes a drive shaft 2 that is rotated at a rotational speed of 0.5 to 1.3 rpm by a drive device with a speed reducer (not shown). The drive shaft 2 is fitted with a boss member 3 that is rotated through a key 2a by the rotation of the drive shaft 2 and rotates a first filter plate and a second filter plate, which will be described later. The boss member 3 includes a first filter plate support boss 31, a second filter plate support boss 32, and a spacer support interposed between the first filter plate support boss 31 and the second filter plate support boss 32. The boss 33 is constituted by mechanical fastening means 34 including fastening bolts, nuts, and washers for fastening them together.

より詳しくは、前記ボス部材3を構成する第1ろ過板支持ボス31は、駆動軸2の軸端側に嵌着され、図示しない駆動装置側にフランジ部を備えている。また、前記ボス部材3を構成する第2ろ過板支持ボス32は、駆動軸2の図示しない駆動装置側に嵌着され、この駆動軸2の軸端側に、前記第1ろ過板支持ボス31のフランジ部と同外径のフランジ部を備えている。また、駆動軸2に嵌着された第1ろ過板支持ボス31と、第2ろ過板支持ボス32の間に嵌着される前記ボス部材3を構成するスペーサ支持ボス33は、外径が第1,2ろ過板支持ボス31,32のフランジ部の外径より小径の円板状に形成されている。そして、これらは、第1,2ろ過板支持ボス31,32のフランジ部とスペーサ支持ボス33を貫通する前記機械的締結手段34とにより一体的に締結されている。   More specifically, the first filter plate support boss 31 constituting the boss member 3 is fitted on the shaft end side of the drive shaft 2 and has a flange portion on the drive device side (not shown). The second filter plate support boss 32 constituting the boss member 3 is fitted to the drive device side (not shown) of the drive shaft 2, and the first filter plate support boss 31 is disposed on the shaft end side of the drive shaft 2. A flange portion having the same outer diameter as that of the flange portion is provided. The spacer support boss 33 constituting the boss member 3 fitted between the first filter plate support boss 31 fitted on the drive shaft 2 and the second filter plate support boss 32 has an outer diameter of the first. 1, 2 is formed in a disk shape having a smaller diameter than the outer diameter of the flange portion of the filter plate support bosses 31, 32. These are integrally fastened by the flange portions of the first and second filter plate support bosses 31 and 32 and the mechanical fastening means 34 penetrating the spacer support boss 33.

前記第1ろ過板支持ボス31のフランジ部は、軸端側の大径フランジ部31aと、スペーサ支持ボス33側の、このスペーサ支持ボス33の外径より外径が若干小径の小径フランジ部31bとからなっている。そして、前記フランジ部の小径フランジ部31bに、多数の水透過穴7aを備えた円盤状の第1ろ過板7の中心部に設けられた嵌合穴が嵌着されると共に、この第1ろ過板7の嵌合穴側の側面が大径フランジ部31aのスペーサ支持ボス33側の面に当接する状態で固着されている。なお、符号7bは、第1ろ過板7を補強するための補強リブであって、この補強リブ7bは、図示省略しているが、この第1ろ過板7の回転中心Oを中心とする放射状に設けられている。   The flange portion of the first filter plate support boss 31 includes a large-diameter flange portion 31a on the shaft end side and a small-diameter flange portion 31b on the spacer support boss 33 side whose outer diameter is slightly smaller than the outer diameter of the spacer support boss 33. It is made up of. And the fitting hole provided in the center part of the disk-shaped 1st filtration board 7 provided with many water permeable holes 7a is fitted by the small diameter flange part 31b of the said flange part, and this 1st filtration is carried out. The side surface on the fitting hole side of the plate 7 is fixed in a state where it abuts on the surface on the spacer support boss 33 side of the large-diameter flange portion 31a. In addition, the code | symbol 7b is a reinforcement rib for reinforcing the 1st filtration board 7, Comprising: Although this illustration of the reinforcement rib 7b is abbreviate | omitted, it is radial centering on the rotation center O of this 1st filtration board 7. Is provided.

前記第2ろ過板支持ボス32のフランジ部は、図示しない駆動装置側の大径フランジ部32aと、スペーサ支持ボス33側の、このスペーサ支持ボス33の外径より外径が若干小径の小径フランジ部32bとからなっている。そして、前記フランジ部の小径フランジ部32bに、多数の水透過穴8aを備えた円盤状の第2ろ過板8の中心部に設けられた嵌合穴が嵌着されると共に、この第2ろ過板8の嵌合穴側の側面が大径フランジ部32aのスペーサ支持ボス33側の面に当接する状態で固着されている。なお、符号8bは、第2ろ過板8を補強するための補強リブであって、この補強リブ8bは、図示省略しているが、この第2ろ過板8の回転中心を中心とする放射状に設けられている。   The flange portion of the second filter plate support boss 32 includes a large-diameter flange portion 32a on the drive device side (not shown) and a small-diameter flange on the spacer support boss 33 side whose outer diameter is slightly smaller than the outer diameter of the spacer support boss 33. It consists of part 32b. And the fitting hole provided in the center part of the disk-shaped 2nd filtration board 8 provided with many water-permeable holes 8a is fitted by the small diameter flange part 32b of the said flange part, and this 2nd filtration is carried out. The side surface on the fitting hole side of the plate 8 is fixed in a state where it abuts on the surface on the spacer support boss 33 side of the large-diameter flange portion 32a. In addition, the code | symbol 8b is a reinforcement rib for reinforcing the 2nd filtration board 8, Comprising: Although this illustration of the reinforcement rib 8b is abbreviate | omitted, it is radial centering on the rotation center of this 2nd filtration board 8. Is provided.

前記スペーサ支持ボス部33には、嵌合穴に滑り軸受4aが嵌着されてなる環状の内輪スペーサ4が回転可能に外嵌されている。この内輪スペーサ4の幅寸法は、その側面が前記第1ろ過板7と第2ろ過板8との嵌合穴側の内面に摺接し得るように設定されている。
そして、内輪スペーサ4の外側には、この内輪スペーサ4の径中心と同心に外輪スペーサ5が設けられており、この外輪スペーサ5の側面には、前記第1ろ過板7と第2ろ過板8の外端縁付近の側面が摺接するように構成されている。なお、本実施の形態1に係る回転加圧脱水機1の第1ろ過板7および第2ろ過板8は、共に直径0.5mmの水透過穴を有するパンチングメタルである。また、回転加圧脱水機の場合においては、ろ過板の水透過穴への汚泥の目詰まり抑制等の観点から、ろ過板の水透過穴の直径を、0.3〜1.0mmの範囲に設定するのが好ましい。
An annular inner ring spacer 4 having a sliding bearing 4a fitted in a fitting hole is fitted on the spacer support boss portion 33 so as to be rotatable. The width dimension of the inner ring spacer 4 is set so that the side surface thereof can be in sliding contact with the inner surface of the first filter plate 7 and the second filter plate 8 on the fitting hole side.
An outer ring spacer 5 is provided outside the inner ring spacer 4 so as to be concentric with the center of the diameter of the inner ring spacer 4. The first filter plate 7 and the second filter plate 8 are disposed on the side surfaces of the outer ring spacer 5. It is comprised so that the side surface vicinity of the outer end edge may slidably contact. Note that the first filter plate 7 and the second filter plate 8 of the rotary pressurization dehydrator 1 according to the first embodiment are both punching metal having a water permeation hole having a diameter of 0.5 mm. In the case of a rotary pressure dehydrator, the diameter of the water permeation hole of the filter plate is in the range of 0.3 to 1.0 mm from the viewpoint of suppressing clogging of sludge into the water permeation hole of the filter plate. It is preferable to set.

前記外輪スペーサ5には、この外輪スペーサ5の中心側に、前記内輪スペーサ4の外周面に密接する凹曲面を有する仕切りスペーサ6が設けられている。この仕切りスペーサ6は、上部仕切りスペーサ6aと、この上部仕切りスペーサ6aと空間6cを隔てた下方位置の下部仕切りスペーサ6bとからなる二股形状に構成されている。そして、この仕切りスペーサ6の下部仕切りスペーサ6bの下側には、横方向に開口する、後述する構成になる汚泥流入口11aが形成されている。また、この仕切りスペーサ6の上部仕切りスペーサ6aの上側に、横方向に開口する脱水ケーキ排出部10が設けられている。さらに、前記仕切りスペーサ6の前記空間6cには、前記第1,2ろ過板7,8の外面側から洗浄水を噴射して、これら第1,2ろ過板7,8を洗浄するための洗浄水噴射装置(図示省略)が設けられている。   The outer ring spacer 5 is provided with a partition spacer 6 having a concave curved surface in close contact with the outer peripheral surface of the inner ring spacer 4 on the center side of the outer ring spacer 5. The partition spacer 6 is formed in a bifurcated shape including an upper partition spacer 6a and a lower partition spacer 6b at a lower position across the space 6c from the upper partition spacer 6a. And the sludge inflow port 11a which becomes the structure mentioned later opened horizontally is formed under the lower partition spacer 6b of this partition spacer 6. As shown in FIG. In addition, a dehydrated cake discharge portion 10 that opens in the horizontal direction is provided above the upper partition spacer 6 a of the partition spacer 6. Further, cleaning water is sprayed into the space 6 c of the partition spacer 6 from the outer surface side of the first and second filter plates 7 and 8 to clean the first and second filter plates 7 and 8. A water injection device (not shown) is provided.

前記内輪スペーサ4の外周面、前記外輪スペーサ5の内周面、前記第1ろ過板7、および前記第2ろ過板8との間には、前記汚泥流入口11aから前記脱水ケーキ排出部10側に向って順に、前記汚泥流入口11aから流入する、調質された汚泥をろ過するろ過ゾーン11bと、ろ過水が除去された汚泥を圧搾脱水する圧搾脱水ゾーン11cとに区分される脱水処理室11が形成されている。前記汚泥流入口11aには、下側に開口する汚泥入口9a、汚泥流路を介して前記汚泥流入口11aに汚泥を供給する汚泥供給部9が取付けられている。また、前記脱水ケーキ排出部10の排出口10aには、脱水処理室11の圧搾脱水ゾーン11c内の圧搾脱水汚泥に対して背圧を付与するための背圧板15が垂直に設けられている。この背圧板15は、図示しない空気ばねやアクチュエータにより押圧されて排出口10aの幅寸法を狭めるように構成されている。   Between the outer peripheral surface of the inner ring spacer 4, the inner peripheral surface of the outer ring spacer 5, the first filter plate 7, and the second filter plate 8, the sludge inlet 11 a is connected to the dehydrated cake discharge unit 10 side. The dehydration treatment chamber is divided into a filtration zone 11b for filtering the conditioned sludge flowing in from the sludge inlet 11a and a squeezing dehydration zone 11c for squeezing and dewatering the sludge from which filtered water has been removed. 11 is formed. The sludge inlet 11a is attached with a sludge inlet 9a that opens downward, and a sludge supply unit 9 that supplies the sludge to the sludge inlet 11a through a sludge channel. Further, a back pressure plate 15 for applying a back pressure to the squeezed dewatered sludge in the squeezing and dewatering zone 11 c of the dewatering treatment chamber 11 is provided vertically at the discharge port 10 a of the dewatered cake discharge unit 10. The back pressure plate 15 is configured to be pressed by an air spring or actuator (not shown) to narrow the width of the discharge port 10a.

前記脱水処理室11内には、第1ろ過板7と第2ろ過板8との相対する面(内側面)のそれぞれにエッジが鋭角的に接触して、第1ろ過板7と第2ろ過板8との相対する内側面のそれぞれに付着する汚泥中の微粒子塊や脱水ケーキを掻取るスクレーパ11dが3枚ずつ(両側で6枚である)設けられている。これらスクレーパ11dの幅は、その全長に亘って同一幅寸法(例えば、32mm)に設定されている。   In the dehydration chamber 11, the edges are in acute contact with the opposing surfaces (inner surfaces) of the first filter plate 7 and the second filter plate 8, so that the first filter plate 7 and the second filter plate 11 are in contact with each other. Three scrapers 11d (six on both sides) are provided for scraping off the lump of fine particles in the sludge and the dehydrated cake adhering to each of the inner surfaces facing the plate 8. The width of these scrapers 11d is set to the same width dimension (for example, 32 mm) over the entire length.

なお、第1ろ過板7側に設けられるスクレーパ11dと第2ろ過板8側に設けられるスクレーパ11dとによって、脱水処理室の流路幅を極力狭めない(即ち、図1において、スクレーパ11d同士が極力重ならない)ように、スクレーパ11dを設けることが、汚泥をスムーズに排出口10aの方に移動させる観点から好ましい。また、スクレーパの一端側の外輪スペーサ側の位置は、他端側の内輪スペーサ側(駆動軸側)の位置よりもろ過板の回転先側になるよう設けられている。このような方向に設けることにより、スクレーパによって掻取られた脱水ケーキ片は外輪スペーサの方向向きの作用力を受けるため、ろ過板の回転中心から離れた位置の脱水ケーキの密度の低下の程度を軽減することができるので、ろ過板のろ過面の全幅に亘る圧搾力分布が均等化されるので、ろ過面の全幅に亘るろ過機能が改善されるので、好ましい。   The flow path width of the dehydration chamber is not reduced as much as possible by the scraper 11d provided on the first filter plate 7 side and the scraper 11d provided on the second filter plate 8 side (that is, the scrapers 11d in FIG. It is preferable to provide the scraper 11d from the viewpoint of smoothly moving the sludge toward the discharge port 10a. Further, the position on the outer ring spacer side on one end side of the scraper is provided so as to be closer to the rotation destination side of the filter plate than the position on the inner ring spacer side (drive shaft side) on the other end side. By providing in such a direction, the dewatered cake piece scraped by the scraper receives an acting force in the direction of the outer ring spacer, so the degree of decrease in the density of the dewatered cake at a position away from the rotation center of the filter plate is reduced. Since it can reduce, since the squeezing force distribution over the full width of the filtration surface of a filter plate is equalized, the filtration function over the full width of a filtration surface is improved, and it is preferable.

そして、これらスクレーパ11dのそれぞれは、一端側が外輪スペーサ5の側面に、また他端側が内輪スペーサ4の側面に、それぞれ2本ずつの締結手段である皿小ネジにより締結、即ち固定されている。以下、スクレーパ11dの一端側の外輪スペーサ5の側面への締結状態と、他端側の内輪スペーサ4の側面への締結状態は全く同構成であるので、図4(a),(b)を参照しながら、スクレーパ11dの外輪スペーサ5の側面への締結を例として説明する。即ち、これらスクレーパ11dのそれぞれの一端側が外輪スペーサ5の側面に設けた取付け用の切欠きに2本の皿小ネジ11eにより締結されている。従って、本発明の実施の形態1に係る回転加圧脱水機1の内輪スペーサ4は、従来例に係る回転加圧脱水機の内輪スペーサのように駆動軸2により回転されるように構成されていない。しかしながら、外輪スペーサ5の内周面に接触する脱水ケーキと同様に、脱水ケーキは第1,2ろ過板7,8の回転に伴って内輪スペーサ4の外周面を滑って移動するため、汚泥の脱水処理に支障が生じるようなことがない。   Each of these scrapers 11d is fastened, that is, fixed to the side surface of the outer ring spacer 5 on one end side and to the side surface of the inner ring spacer 4 on the other end side by two countersunk screws as fastening means. Hereinafter, since the fastening state to the side surface of the outer ring spacer 5 on one end side of the scraper 11d and the fastening state to the side surface of the inner ring spacer 4 on the other end side are completely the same, FIG. 4 (a) and FIG. The fastening to the side surface of the outer ring spacer 5 of the scraper 11d will be described as an example with reference. That is, one end of each of the scrapers 11d is fastened to the mounting notch provided on the side surface of the outer ring spacer 5 by two countersunk screws 11e. Therefore, the inner ring spacer 4 of the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention is configured to be rotated by the drive shaft 2 like the inner ring spacer of the rotary pressure dehydrator according to the conventional example. Absent. However, since the dewatered cake slides on the outer peripheral surface of the inner ring spacer 4 as the first and second filter plates 7 and 8 rotate in the same manner as the dehydrated cake that contacts the inner peripheral surface of the outer ring spacer 5, There is no problem with the dehydration process.

前記第1ろ過板7の外側には第1カバー12が配設され、この第1カバー12はフランジ部が前記外輪スペーサ5の側面に固着されている。また、前記第2ろ過板8の外側には第2カバー13が配設され、この第2カバー13はフランジ部が前記外輪スペーサ5の側面に固着されている。これら第1カバー12、第2カバー13それぞれの下部には、下方に突出するドレン管14が設けられており、前記汚泥供給部9、汚泥入口9aを経て脱水処理室11内に供給され、前記第1,2ろ過板7,8に設けられた多数の水透過穴7a,8aを介して、前記第1カバー12内、前記第2カバー13内に排出された汚泥中の水分は、前記ドレン管14から機外に排水されるようになっている。   A first cover 12 is disposed outside the first filter plate 7, and a flange portion of the first cover 12 is fixed to a side surface of the outer ring spacer 5. A second cover 13 is disposed outside the second filter plate 8, and a flange portion of the second cover 13 is fixed to a side surface of the outer ring spacer 5. A drain pipe 14 projecting downward is provided at the lower part of each of the first cover 12 and the second cover 13, and is supplied into the dehydration treatment chamber 11 through the sludge supply unit 9 and the sludge inlet 9 a, The water in the sludge discharged into the first cover 12 and the second cover 13 through the many water-permeable holes 7a, 8a provided in the first and second filter plates 7, 8 is the drainage. The pipe 14 is drained out of the machine.

以下、本発明の実施の形態1に係る回転加圧脱水機1の作用態様を説明する。即ち、本発明の実施の形態1に係る回転加圧脱水機1によれば、高分子凝集剤の添加・混合により調質された汚泥が、汚泥圧入ポンプ(図示省略)により最大100kPa(約1.0kgf/cm)に加圧される。加圧された汚泥が前記汚泥供給部9の下側に開口する汚泥入口9a、汚泥流路、および汚泥流入口11aを介して0.5〜1.3rpmのゆっくりした速度で回転されている脱水処理室11の下側のろ過ゾーン11bに連続供給され続け、能率よく脱水される。そして、脱水処理室11の下側のろ過ゾーン11bに供給された汚泥は、このろ過ゾーン11bでろ過され、徐々に流動性が失われる。 Hereinafter, an operation mode of the rotary pressure dehydrator 1 according to the first embodiment of the present invention will be described. That is, according to the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention, the sludge conditioned by the addition / mixing of the polymer flocculant is converted to a maximum of 100 kPa (about 1) by a sludge press-fitting pump (not shown). To 0.0 kgf / cm 2 ). The dewatering in which the pressurized sludge is rotated at a slow speed of 0.5 to 1.3 rpm via the sludge inlet 9a, the sludge flow path, and the sludge inlet 11a that open to the lower side of the sludge supply section 9. Continuously supplied to the filtration zone 11b below the processing chamber 11 and efficiently dehydrated. And the sludge supplied to the lower filtration zone 11b of the dehydration processing chamber 11 is filtered in the filtration zone 11b, and the fluidity is gradually lost.

前記ろ過ゾーン11bにおけるろ過により流動性が低下した汚泥は、多数の水透過穴が設けられた円盤状の第1ろ過板7、および第2ろ過板8の表面にケーキ層を徐々に形成しながら、これら第1ろ過板7、第2ろ過板8の回転により圧搾脱水ゾーン11c側に移動する。これら第1ろ過板7、第2ろ過板8の表面に形成されたケーキ層により固形物の捕捉が向上するために、ろ液は清浄になる。   Sludge whose fluidity has been reduced by filtration in the filtration zone 11b is gradually forming a cake layer on the surfaces of the disk-shaped first filter plate 7 and the second filter plate 8 provided with a large number of water permeation holes. The first filter plate 7 and the second filter plate 8 are rotated to move toward the squeezing and dehydrating zone 11c. Since the trapping of the solid matter is improved by the cake layer formed on the surfaces of the first filter plate 7 and the second filter plate 8, the filtrate is cleaned.

そして、前記圧搾脱水ゾーン11c領域中における汚泥は、前記脱水ケーキ排出部10の排出口10aに設けられた背圧板15の押圧力制御(空気ばね、アクチュエータの空気圧力制御)により背圧が最大600kPa(約6.0kgf/cm)の一定圧力(調整可能である)に保持され続ける。流動性を失った汚泥は、これら第1ろ過板7、第2ろ過板8によるせん断力と、背圧板15による発生する背圧により圧搾脱水される。そして、圧搾脱水された低含水率になった脱水ケーキは、背圧板15を押し退けて脱水ケーキ排出部10から機外へ排出される。 The sludge in the compressed dewatering zone 11c region has a maximum back pressure of 600 kPa by pressing force control of the back pressure plate 15 (air spring, actuator air pressure control) provided at the discharge port 10a of the dewatered cake discharge unit 10. It is kept at a constant pressure (adjustable) of (about 6.0 kgf / cm 2 ). The sludge that has lost its fluidity is squeezed and dehydrated by the shear force generated by the first filter plate 7 and the second filter plate 8 and the back pressure generated by the back pressure plate 15. Then, the dehydrated cake having a low water content that has been squeezed and dehydrated is pushed out of the back pressure plate 15 and discharged from the dehydrated cake discharge unit 10 to the outside of the machine.

上記のような汚泥の脱水工程において、本発明の実施の形態1に係る回転加圧脱水機1では、一端側が外輪スペーサ5の側面に、他端側が内輪スペーサ4の側面に締結されたスクレーパ11dによって第1ろ過板7と第2ろ過板8の相対する内側面のそれぞれに付着する汚泥中の微粒子塊や脱水ケーキが掻取られる。従って、本発明の実施の形態1に係る回転加圧脱水機1によれば、第1ろ過板7と第2ろ過板8の水透過穴7a,8aの目詰まりが防止され、汚泥を能率良く脱水処理することができるため、汚泥の処理能率の向上に対して大いに寄与することができる。   In the sludge dewatering step as described above, in the rotary pressure dewatering machine 1 according to Embodiment 1 of the present invention, the scraper 11d having one end fastened to the side of the outer ring spacer 5 and the other end fastened to the side of the inner ring spacer 4. As a result, the lump of fine particles and the dehydrated cake in the sludge adhering to each of the opposing inner surfaces of the first filter plate 7 and the second filter plate 8 are scraped off. Therefore, according to the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention, clogging of the water permeation holes 7a and 8a of the first filter plate 7 and the second filter plate 8 is prevented, and sludge is efficiently obtained. Since it can be dehydrated, it can greatly contribute to the improvement of sludge treatment efficiency.

本発明の実施の形態1に係る回転加圧脱水機1の汚泥脱水能力を確認するために、本発明の実施の形態1に係る回転加圧脱水機1と、スクレーパ11dの他端側を内輪スペーサ4の側面に締結する皿小ネジを取外した、一端側だけが外輪スペーサ5に締結され、かつスクレーパの他端側の内輪スペーサ側の位置を、一端側の外輪スペーサ側の位置よりもろ過板の回転先側にした回転加圧脱水機(以下、従来型の回転加圧脱水機という)とについて、汚泥の脱水試験を行った。   In order to confirm the sludge dewatering capacity of the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention, the other end of the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention and the scraper 11d is connected to the inner ring. The countersunk machine screw fastened to the side surface of the spacer 4 is removed, only one end side is fastened to the outer ring spacer 5, and the position on the inner ring spacer side on the other end side of the scraper is filtered more than the position on the outer ring spacer side on one end side. A sludge dewatering test was performed on a rotary pressure dehydrator (hereinafter referred to as a conventional rotary pressure dehydrator) on the plate rotation destination side.

その結果、従来型の回転加圧脱水機の場合は、固形物処理量(汚泥供給量)は116kg−DS/m/時で、脱水で得られた脱水ケーキの含水率は82.5%(薬注率(対固形物比)は、約0.9%)であった。一方、本発明の実施の形態1に係る回転加圧脱水機1の場合は、固形物処理量(汚泥供給量)は136kg−DS/m/時で、脱水で得られた脱水ケーキの含水率は79.6%(薬注率(対固形物比)は、従来型の場合と同等の約0.9%)であった。従って、本発明の実施の形態1に係る回転加圧脱水機1によれば、従来型の回転加圧脱水機よりも固形物処理量を15%以上増加させることができ、脱水ケーキの含水率を約3%以上低減させることができる。また、固形物回収率は、何れも95%以上であった。なお、脱水処理するために、従来型の回転加圧脱水機の汚泥流入口と、本発明の実施の形態1に係る回転加圧脱水機1の汚泥流入口11aに供給した汚泥の含水率は約96%(固形物濃度約4%)であり、またこの脱水試験に使用した凝集剤はカチオン系高分子凝集剤である。 As a result, in the case of the conventional rotary pressure dehydrator, the solids processing amount (sludge supply amount) is 116 kg-DS / m 2 / hour, and the moisture content of the dehydrated cake obtained by dehydration is 82.5%. (Chemical injection rate (ratio of solids) was about 0.9%). On the other hand, in the case of the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention, the amount of solids processed (sludge supply amount) is 136 kg-DS / m 2 / hour, and the water content of the dehydrated cake obtained by dehydration The rate was 79.6% (the chemical injection rate (solids ratio) was about 0.9%, which was the same as in the conventional type). Therefore, according to the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention, the solids throughput can be increased by 15% or more compared to the conventional rotary pressure dehydrator, and the moisture content of the dehydrated cake can be increased. Can be reduced by about 3% or more. In addition, the solids recovery rate was 95% or more. The water content of the sludge supplied to the sludge inlet of the conventional rotary pressure dehydrator and the sludge inlet 11a of the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention for the dehydration treatment is The coagulant used in this dehydration test is a cationic polymer coagulant.

また、本発明の実施の形態1に係る回転加圧脱水機1では、上記のとおり、スクレーパ11dの一端側が2本の皿小ネジ11eにより外輪スペーサ5の側面に締結され、他端側が2本の皿小ネジ11eにより内輪スペーサ4の側面に締結されている。そのため、従来例に係る回転加圧脱水機のスクレーパのように端部側が撓むようなことがないから、それぞれのスクレーパ11dを第1,2ろ過板7,8の内側面の全幅に亘って確実に接触させることができる。   Moreover, in the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention, as described above, one end side of the scraper 11d is fastened to the side surface of the outer ring spacer 5 by the two countersunk screws 11e, and the other end side is two. It is fastened to the side surface of the inner ring spacer 4 by a countersunk machine screw 11e. Therefore, since the end side does not bend like the scraper of the rotary pressure dehydrator according to the conventional example, each scraper 11d is surely secured over the entire inner surface of the first and second filter plates 7 and 8. Can be contacted.

従って、本発明の実施の形態1に係る回転加圧脱水機1によれば、従来例に係る回転加圧脱水機よりもスクレーパ11dの配設数を少なくすることができ、回転加圧脱水機1の構成の簡単化およびコスト低減に対して大いに寄与することができる。また、本実施の形態1に係る回転加圧脱水機1では、スクレーパ11dの幅寸法は、全長に亘って同幅寸法に設定されている。従って、先細りの構成になる従来例のスクレーパよりも構成が簡単で加工工数が少なく,スクレーパ11dを安価に製造することができるから、回転加圧脱水機1のコスト低減に対しても寄与することができる。   Therefore, according to the rotary pressure dehydrator 1 according to Embodiment 1 of the present invention, the number of scrapers 11d can be reduced as compared with the rotary pressure dehydrator according to the conventional example, and the rotary pressure dehydrator can be reduced. This can greatly contribute to the simplification and cost reduction of the one configuration. Moreover, in the rotary pressurization dehydrator 1 according to the first embodiment, the width dimension of the scraper 11d is set to the same width dimension over the entire length. Therefore, the configuration is simpler than the conventional scraper having a tapered configuration, the number of processing steps is small, and the scraper 11d can be manufactured at a low cost, which contributes to the cost reduction of the rotary pressure dehydrator 1. Can do.

本発明の実施の形態2に係る回転加圧脱水機を、カバーの一部を切欠いて示す回転加圧脱水機の概略構成を示す一部省略側面図の図5を参照しながら説明する。なお、本発明の実施の形態2に係る回転加圧脱水機が、上記実施の形態1に係る回転加圧脱水機と相違するところは、仕切りスペーサと内輪スペーサとの構成の相違にあり、この相違以外は全く同構成であるから、同一のもの並びに同一機能を有するものに、同一符号を付してその相違する点について説明する。   A rotary pressurizing dehydrator according to Embodiment 2 of the present invention will be described with reference to FIG. 5 which is a partially omitted side view showing a schematic configuration of a rotary pressurizing dehydrator with a part of a cover cut away. The difference between the rotary pressure dehydrator according to the second embodiment of the present invention and the rotary pressure dehydrator according to the first embodiment is the difference in configuration between the partition spacer and the inner ring spacer. Since the configuration is the same except for the differences, the same components and the components having the same functions are denoted by the same reference numerals, and different points will be described.

即ち、本発明の実施の形態2に係る回転加圧脱水機の仕切りスペーサ6は、上記従来例1の場合と同様に、空間6cを隔てた上部側の上部仕切りスペーサ6aと、下部側の下部仕切りスペーサ6bとから構成されているが、この仕切りスペーサ6は内輪スペーサ4と一体的に構成されている。そして、上記実施の形態1に係る回転加圧脱水機1の場合と同様に、前記内輪スペーサ4の中心に設けられた嵌合穴に滑り軸受4aが嵌着されると共に、全長に亘って同一幅寸法に設定されたスクレーパ11dの一端側が2本の皿小ネジにより外輪スペーサ5の側面に締結されると共に、他端側が2本の皿小ネジにより内輪スペーサ4の側面に締結されている。   That is, the partition spacer 6 of the rotary pressurizing dehydrator according to Embodiment 2 of the present invention is similar to the conventional example 1 in that the upper partition spacer 6a on the upper side across the space 6c and the lower partition on the lower side. The partition spacer 6 is configured integrally with the inner ring spacer 4. As in the case of the rotary pressurization dehydrator 1 according to the first embodiment, the sliding bearing 4a is fitted in the fitting hole provided in the center of the inner ring spacer 4, and the same over the entire length. One end side of the scraper 11d set to the width dimension is fastened to the side surface of the outer ring spacer 5 by two countersunk screws, and the other end side is fastened to the side surface of the inner ring spacer 4 by two countersunk screws.

本発明の実施の形態2に係る回転加圧脱水機は、仕切りスペーサ6と内輪スペーサ4とが一体的に構成されている点以外の構成は、上記実施の形態1に係る回転加圧脱水機1と同構成であるから、上記実施の形態1に係る回転加圧脱水機1と同等の効果を得ることができる。また、本発明の実施の形態2に係る回転加圧脱水機の場合には、第1ろ過板7と第2ろ過板8との回転による汚泥の移動に伴う内輪スペーサ4の回転力の一部が仕切りスペーサ6によって受け持たれる。従って、スクレーパ11dの強度を上記実施の形態1に係る回転加圧脱水機1の場合よりも低強度にすることができる。   The rotary pressure dehydrator according to Embodiment 2 of the present invention is the same as the rotary pressure dehydrator according to Embodiment 1 except that the partition spacer 6 and the inner ring spacer 4 are integrally configured. 1 has the same configuration as that of the rotary pressurizing dehydrator 1 according to the first embodiment. In the case of the rotary pressure dehydrator according to Embodiment 2 of the present invention, part of the rotational force of the inner ring spacer 4 accompanying the movement of sludge by the rotation of the first filter plate 7 and the second filter plate 8. Is held by the partition spacer 6. Therefore, the strength of the scraper 11d can be made lower than that of the rotary pressurization dehydrator 1 according to the first embodiment.

本発明の実施の形態3に係る回転加圧脱水機を、その内輪スペーサと、外輪スペーサと、仕切りスペーサの位置関係状態説明図の図6を参照しながら説明する。なお、本発明の実施の形態3に係る回転加圧脱水機が、上記実施の形態1に係る回転加圧脱水機と相違するところは、外輪スペーサの構成の相違にあり、この相違以外は全く同構成であるから、同一のもの並びに同一機能を有するものに同一符号を付して、その相違する点について説明する。   A rotary pressurizing dehydrator according to Embodiment 3 of the present invention will be described with reference to FIG. 6 of the positional relation state explanatory diagram of the inner ring spacer, the outer ring spacer, and the partition spacer. The difference between the rotary pressure dehydrator according to the third embodiment of the present invention and the rotary pressure dehydrator according to the first embodiment is the difference in the configuration of the outer ring spacer. Since it is the same structure, the same code | symbol is attached | subjected to what has the same function and the same function, and the difference is demonstrated.

本発明の実施の形態3に係る回転加圧脱水機1の場合、回転中心Oを通る水平線よりも下側では、回転中心Oと外輪スペーサ5の内周面までの寸法は同一であるが、回転中心Oを通る水平線よりも上側では、上側になるに連れて回転中心Oと外輪スペーサ5の内周面までの寸法が次第に小寸法になるように設定されている。より具体的には、回転中心Oを通る水平線よりも下側では、回転中心Oを通る直線と内輪スペーサ4の外周面と外輪スペーサ5の内周面との交点間の間隔Wは上記実施の形態1と同様であるが、回転中心Oを通る水平線よりも上側では、水平位置における間隔WはWより小さく、Wより上方のW,さらに上方のWになるに連れて次第に小さくなるように、つまり次第にろ過面積が減少するように設定されている。 In the case of the rotary pressurization dehydrator 1 according to Embodiment 3 of the present invention, the dimension from the rotation center O to the inner peripheral surface of the outer ring spacer 5 is the same below the horizontal line passing through the rotation center O. Above the horizontal line passing through the rotation center O, the dimension from the rotation center O to the inner peripheral surface of the outer ring spacer 5 is set to gradually become smaller as it goes upward. More specifically, below the horizontal line passing through the rotation center O, the interval W 0 between the intersections of the straight line passing through the rotation center O, the outer peripheral surface of the inner ring spacer 4 and the inner peripheral surface of the outer ring spacer 5 is However, as the distance W 1 at the horizontal position is smaller than W 0 above the horizontal line passing through the center of rotation O, it becomes W 2 above W 1 and W 3 further above W 1. It is set so that the filtration area gradually decreases, that is, the filtration area gradually decreases.

従って、本発明の実施の形態3に係る回転加圧脱水機1によれば、圧搾脱水ゾーン11cにおいて、脱水ケーキ排出部10側に向かうに連れて圧搾作用が高まるので、汚泥の脱水率が向上するという効果を得ることができる。なお、本発明の実施の形態3では、内輪スペーサ4と仕切りスペーサ6とは分離構成になっているが、上記実施の形態2のように内輪スペーサ4と仕切りスペーサ6とは一体的に構成されていても良い。   Therefore, according to the rotary pressure dehydrator 1 according to Embodiment 3 of the present invention, in the squeeze dehydration zone 11c, the squeezing action increases toward the dehydrated cake discharger 10 side, so the sludge dewatering rate is improved. The effect of doing can be obtained. In the third embodiment of the present invention, the inner ring spacer 4 and the partition spacer 6 are separated from each other. However, as in the second embodiment, the inner ring spacer 4 and the partition spacer 6 are integrally configured. May be.

ところで、上記実施の形態では、スクレーパ11dは、外輪スペーサ5および内輪スペーサ4に皿小ネジにより固定されている回転加圧脱水機を例に説明したが、これに限定されるものではなく、外輪スペーサ5及び内輪スペーサ4にそれぞれ溝を設け、スクレーパ11d端部をそれぞれの溝に挿入することにより固定してもよい。また、脱水処理室11の幅方向の両側に多数の水透過穴が設けられてなるろ過面を有する円盤状のろ過板が配設されている回転加圧脱水機を例として説明した。しかしながら、例えば脱水処理室の幅方向の何れか一方に円盤状のろ過板が配設されていれば、それなりの効果を得ることができる。また、脱水処理する汚泥を下側の汚泥供給部から供給して上側の脱水ケーキ排出部から脱水ケーキを排出する回転加圧脱水機を例として説明した。しかしながら、汚泥を上側の汚泥供給部から供給して、下側の脱水ケーキ排出部から脱水ケーキを排出する構成の従来例に係る回転加圧脱水機に対しても本発明の技術的思想を適用することができる。さらに、ろ過板にパンチングメタルを用いた回転加圧脱水機を例として説明した。しかしながら、ウエッジワイヤースクリーン等、汚泥と水分を分離することができる部材であれば利用可能であるから、特にパンチングメタルに限るものではない。   By the way, in the said embodiment, although the scraper 11d demonstrated the rotary pressurization dehydrator fixed to the outer ring spacer 5 and the inner ring spacer 4 with the countersunk screw as an example, it is not limited to this. A groove may be provided in each of the spacer 5 and the inner ring spacer 4, and the end portion of the scraper 11d may be fixed by being inserted into each groove. Further, the rotary pressure dehydrator in which a disk-shaped filter plate having a filtration surface in which a large number of water permeation holes are provided on both sides in the width direction of the dehydration treatment chamber 11 has been described as an example. However, for example, if a disc-shaped filter plate is disposed in any one of the width directions of the dehydration chamber, a certain effect can be obtained. Further, the rotary pressure dehydrator that supplies the sludge to be dehydrated from the lower sludge supply unit and discharges the dehydrated cake from the upper dehydrated cake discharge unit has been described as an example. However, the technical idea of the present invention is also applied to the rotary pressure dehydrator according to the conventional example in which the sludge is supplied from the upper sludge supply section and the dehydrated cake discharge section is discharged from the lower dewatered cake discharge section. can do. Furthermore, the rotary pressurization dehydrator which used the punching metal for the filter plate was demonstrated as an example. However, any member that can separate sludge and moisture, such as a wedge wire screen, can be used, and is not particularly limited to punching metal.

従って、上記実施の形態1,2に係る回転加圧脱水機は、本発明の具体例に過ぎないものであり、そして本発明の技術的思想を逸脱しない範囲内における設計変更等は自由自在であるから、回転加圧脱水機の形態は上記実施の形態1,2に係る回転加圧脱水機の形態に限定されるものではない。   Therefore, the rotary pressurization dehydrator according to Embodiments 1 and 2 is only a specific example of the present invention, and design changes and the like can be freely made without departing from the technical idea of the present invention. Therefore, the form of the rotary pressure dehydrator is not limited to the form of the rotary pressure dehydrator according to the first and second embodiments.

本発明の実施の形態1に係り、カバーの一部を切欠いて示す回転加圧脱水機の概略構成を示す一部省略側面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially omitted side view showing a schematic configuration of a rotary pressurizing dehydrator according to Embodiment 1 of the present invention, with a part of a cover cut away. 図1のA−A線断面図である。It is the sectional view on the AA line of FIG. 図2のB部拡大図である。It is the B section enlarged view of FIG. 本発明の実施の形態1に係り、図4(a)は外輪スペーサへのスクレーパの取り付け状態説明図であり、図4(b)は図4(a)のC矢視図である。FIG. 4 (a) is an explanatory diagram of the state of attachment of the scraper to the outer ring spacer, and FIG. 4 (b) is a view as seen from the arrow C in FIG. 4 (a), according to the first embodiment of the present invention. 本発明の実施の形態2に係り、カバーの一部を切欠いて示す回転加圧脱水機の概略構成を示す一部省略側面図である。FIG. 6 is a partially omitted side view showing a schematic configuration of a rotary pressurizing dehydrator according to Embodiment 2 of the present invention, with a part of a cover cut away. 本発明の実施の形態3に係り、回転加圧脱水機の内輪スペーサと、外輪スペーサと、仕切りスペーサの位置関係状態説明図である。FIG. 10 is an explanatory diagram showing a positional relationship between an inner ring spacer, an outer ring spacer, and a partition spacer of a rotary pressurizing dehydrator according to Embodiment 3 of the present invention. 従来例1に係る回転加圧脱水機の要部拡大図である。It is a principal part enlarged view of the rotary pressurization dehydrator which concerns on the prior art example 1. FIG. 従来例2に係る回転加圧脱水機の内部構造を示す側面図である。It is a side view which shows the internal structure of the rotary pressurization dehydrator which concerns on the prior art example 2.

符号の説明Explanation of symbols

1…回転加圧脱水機
2…駆動軸,2a…キー
3…ボス部材,31…第1ろ過板支持ボス,31a…大径フランジ部,31b…小径フランジ部,32…第2ろ過板支持ボス,32a…大径フランジ部,32b…小径フランジ部,33…スペーサ支持ボス,34…締結手段
4…内輪スペーサ,4a…滑り軸受
5…外輪スペーサ
6…仕切りスペーサ,6a…上部仕切りスペーサ,6b…下部仕切りスペーサ,6c…空間
7…第1ろ過板,7a…水透過穴,7b…補強リブ
8…第2ろ過板,8a…水透過穴,8b…補強リブ
9…汚泥供給部,9a…汚泥入口
10…脱水ケーキ排出部,10a…排出口
11…脱水処理室,11a…汚泥流入口,11b…ろ過ゾーン,11c…圧搾脱水ゾーン,11d…スクレーパ,11e…皿小ネジ
12…第1カバー
13…第2カバー
14…ドレン管
15…背圧板
O…ろ過板(駆動軸)の回転中心
DESCRIPTION OF SYMBOLS 1 ... Rotary pressure dehydrator 2 ... Drive shaft, 2a ... Key 3 ... Boss member, 31 ... 1st filter plate support boss, 31a ... Large diameter flange part, 31b ... Small diameter flange part, 32 ... 2nd filter plate support boss 32a ... large diameter flange portion, 32b ... small diameter flange portion, 33 ... spacer support boss, 34 ... fastening means 4 ... inner ring spacer, 4a ... slide bearing 5 ... outer ring spacer 6 ... partition spacer, 6a ... upper partition spacer, 6b ... Lower partition spacer, 6c ... space 7 ... first filter plate, 7a ... water permeation hole, 7b ... reinforcement rib 8 ... second filter plate, 8a ... water permeation hole, 8b ... reinforcement rib 9 ... sludge supply section, 9a ... sludge Inlet 10: Dehydrated cake discharge part, 10a ... Discharge port 11 ... Dehydration treatment chamber, 11a ... Sludge inlet, 11b ... Filtration zone, 11c ... Squeeze dewatering zone, 11d ... Scraper, 11e ... Countersunk screw 12 ... First Rotational center of the bar 13 ... second cover 14 ... drain pipe 15 ... back plate O ... filtration plate (drive shaft)

Claims (4)

水平な駆動軸により回転され、少なくとも幅方向の一方側に、多数の水透過穴を有し、外端縁付近の側面が外輪スペーサの側面に摺接する円盤状のろ過板を備えた脱水処理室が設けられ、この脱水処理室内に汚泥を供給する汚泥供給部と、脱水ケーキを排出する脱水ケーキ排出部が設けられると共に、前記ろ過板の前記脱水処理室内側の側面に鋭角的に接触するスクレーパが設けられてなる回転加圧脱水機において、前記スクレーパの一端側が前記外輪スペーサ側に固定されると共に、前記駆動軸の外周部に、前記ろ過板の回転中心側の側面が摺接する側面を有し、前記ろ過板の回転を許容する環状の内輪スペーサが設けられ、前記内輪スペーサ側に前記スクレーパの他端側が固定されてなることを特徴とする回転加圧脱水機。 A dehydration processing chamber provided with a disk-shaped filter plate that is rotated by a horizontal drive shaft, has a large number of water-permeable holes on at least one side in the width direction, and has a side surface in the vicinity of the outer edge slidably in contact with the side surface of the outer ring spacer And a sludge supply section for supplying sludge into the dehydration chamber, a dewatering cake discharge section for discharging the dehydrated cake, and a scraper that makes acute contact with the side surface of the filter plate on the dehydration chamber side. In the rotary pressurizing and dehydrating machine provided with one end side of the scraper is fixed to the outer ring spacer side, and the outer peripheral portion of the drive shaft has a side surface on which the side surface on the rotation center side of the filter plate is in sliding contact. An annular inner ring spacer that allows rotation of the filter plate is provided, and the other end side of the scraper is fixed to the inner ring spacer side. 前記駆動軸にボス部材が外嵌され、このボス部材は、前記円盤状のろ過板を回転させるろ過板支持ボスと、前記内輪スペーサが滑り軸受を介して外嵌されるスペーサ支持ボスとが締結手段により一体的に締結されてなることを特徴とする請求項1に記載の回転加圧脱水機。   A boss member is externally fitted to the drive shaft, and the boss member is fastened to a filter plate support boss that rotates the disk-shaped filter plate and a spacer support boss to which the inner ring spacer is externally fitted via a slide bearing. The rotary pressure dehydrator according to claim 1, wherein the rotary pressure dehydrator is integrally fastened by means. 前記汚泥供給部と前記脱水ケーキ排出部とを仕切る仕切りスペーサが設けられ、前記内輪スペーサは、前記仕切りスペーサと一体的に構成されてなることを特徴とする請求項1または2のうちの何れか一つの項に記載の回転加圧脱水機。   The partition spacer which partitions off the said sludge supply part and the said dewatering cake discharge | emission part is provided, The said inner ring spacer is comprised integrally with the said partition spacer, Either of Claim 1 or 2 characterized by the above-mentioned. The rotary pressure dehydrator according to one item. 前記スクレーパの幅寸法は、全長に亘って同幅寸法に設定されてなることを特徴とする請求項1乃至3のうちの何れか一つの項に記載の回転加圧脱水機。   The rotary pressure dehydrator according to any one of claims 1 to 3, wherein the width dimension of the scraper is set to the same width dimension over the entire length.
JP2007164032A 2007-06-21 2007-06-21 Rotary pressure dehydrator Expired - Fee Related JP4051394B1 (en)

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CN109019922A (en) * 2018-08-23 2018-12-18 周云香 A kind of sewage disposal device
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CN108905356A (en) * 2018-08-09 2018-11-30 浙江荟美食品饮料有限公司 A kind of fruit juice filter
CN108905356B (en) * 2018-08-09 2023-10-27 浙江荟美食品饮料有限公司 Fruit juice filtering device
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CN109847438A (en) * 2019-02-20 2019-06-07 洛阳矿山机械工程设计研究院有限责任公司 A kind of fixed device in the conical surface plug-in type unilateral side of disk filter filter plate
CN109847438B (en) * 2019-02-20 2023-12-12 洛阳矿山机械工程设计研究院有限责任公司 Conical surface inserted single-side fixing device of disc filter plate

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