JP2007289839A - Multi-disc dehydrator - Google Patents

Multi-disc dehydrator Download PDF

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JP2007289839A
JP2007289839A JP2006119569A JP2006119569A JP2007289839A JP 2007289839 A JP2007289839 A JP 2007289839A JP 2006119569 A JP2006119569 A JP 2006119569A JP 2006119569 A JP2006119569 A JP 2006119569A JP 2007289839 A JP2007289839 A JP 2007289839A
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disk
reinforcing
spacer
disc
filter body
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JP4600343B2 (en
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Mitsuhisa Imaeda
満久 今枝
Izumi Kuwabara
泉 桑原
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IHI Corp
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IHI Corp
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Filtration Of Liquid (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-disc dehydrator which can keep performance for a long time by preventing a disc and a spacer of a filter element from being injured, diminish a maintenance service cost, and enhance the operating efficiency. <P>SOLUTION: The filter element 7 is configured to such a shape that the multiple discs 9 are each fitted into a rotary shaft 8 through the interposed spacer of a smaller diameter than the disc 9 and rotatable in one piece. Further, a required number of the discs 9 are connected with each other in the way that they are partially overlapped, and the groups 4 and 5 of the filter elements 7 which make up the multi-disc dehydrator, filtrate a dehydration product from gaps between the overlapped parts of the discs 9. In addition, an assembly of the discs 9 and the spacers forms a filtration part, and a reinforcing disc, which has a thickness equal to the combined thicknesses of at least, the disc 9 and the spacer, and slides in contact with the wall surface of a dehydration tank, is formed on both ends of the filtration part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、下水汚泥、し尿汚泥、その他産廃汚泥等の被脱水処理物に対して濾過処理をして固形分と濾液とを分離する多重円板脱水装置に関するものである。   The present invention relates to a multiple disk dewatering device that separates solids and filtrate by subjecting a material to be dewatered such as sewage sludge, human waste sludge, and other industrial waste sludge to filtration.

下水汚泥、し尿汚泥、その他産廃汚泥等の被脱水処理物に対して濾過処理をして固形分と濾液とを分離する濾過装置の１つに、多重円板脱水装置がある。   A multi-disk dewatering device is one of filtration devices that separates solids and filtrates by subjecting a material to be dewatered such as sewage sludge, human waste sludge, and other industrial waste sludge.

先ず、多重円板脱水装置について、図４〜図６を参照して概略を説明する。   First, the outline of the multiple disk dewatering device will be described with reference to FIGS.

多重円板脱水装置は、主に、多重円板脱水機１及び該多重円板脱水機１に連設された凝集装置２を具備している。   The multiple disk dewatering apparatus mainly includes a multiple disk dewatering machine 1 and an aggregating device 2 connected to the multiple disk dewatering machine 1.

前記多重円板脱水機１は、脱水槽３の内部に上部濾体群４と下部濾体群５とがケーキ搬送路６を形成する様に上下に配設されており、該ケーキ搬送路６は下流側に向って断面積が漸次減少し、下流端が前記脱水槽３の壁面に開口して吐出口１０を形成すると共に前記上部濾体群４の上流側は前記下部濾体群５に対して短くなっており、前記ケーキ搬送路６の上流端部の上面は開放された形状となっている。   In the multiple disk dehydrator 1, an upper filter body group 4 and a lower filter body group 5 are arranged in the dehydration tank 3 so as to form a cake transport path 6. The cake transport path 6 The sectional area gradually decreases toward the downstream side, the downstream end opens on the wall surface of the dehydration tank 3 to form the discharge port 10, and the upstream side of the upper filter group 4 is connected to the lower filter group 5. On the other hand, the upper surface of the upstream end portion of the cake conveying path 6 is open.

前記上部濾体群４、前記下部濾体群５は、それぞれ所要数の濾体７が一部重合する様に連設されて構成されており、該濾体７は前記脱水槽３の両側壁２５，２６に掛渡って回転可能に設けられ、図示しない駆動装置により前記上部濾体群４、前記下部濾体群５の対峙部がそれぞれ下流側に向って回転する様に駆動されている。   The upper filter body group 4 and the lower filter body group 5 are configured so that a required number of filter bodies 7 are partially polymerized, and the filter bodies 7 are formed on both side walls of the dehydration tank 3. 25 and 26 are provided so as to be able to rotate, and are driven so that the opposing portions of the upper filter body group 4 and the lower filter body group 5 rotate toward the downstream side by a driving device (not shown).

前記濾体７は、回転軸８に多数の円板９、スペーサ２０が交互に嵌装された構成となっている。前記円板９は金属製であり、前記スペーサ２０は合成樹脂の成型品が使用されている。尚、図示では分易く、前記スペーサ２０の厚みを円板９と比して大きくしているが、実際には該円板９の板厚に対して僅かに大きくなっている。   The filter body 7 has a configuration in which a large number of discs 9 and spacers 20 are alternately fitted to the rotary shaft 8. The disk 9 is made of metal, and the spacer 20 is a synthetic resin molded product. In addition, although it is easy to understand in the drawing, the thickness of the spacer 20 is made larger than that of the disk 9, but actually, it is slightly larger than the thickness of the disk 9.

前記回転軸８には一部が面取りされたキー部８ａが形成され、前記円板９、前記スペーサ２０の前記回転軸８が貫通する嵌合する孔は前記キー部８ａに対応して、キー部９ａ、キー部２０ａが形成され、前記キー部８ａと前記キー部９ａ、前記キー部２０ａとの係合により、前記回転軸８の回転力が前記円板９、前記スペーサ２０に伝達される様になっている。   The rotary shaft 8 is formed with a chamfered key portion 8a, and the hole through which the rotary shaft 8 of the disk 9 and the spacer 20 passes corresponds to the key portion 8a. A portion 9a and a key portion 20a are formed, and the rotational force of the rotary shaft 8 is transmitted to the disk 9 and the spacer 20 by the engagement of the key portion 8a with the key portion 9a and the key portion 20a. It is like.

隣接する前記濾体７，７の円板９，９は前記スペーサ２０が形成する隙間に周辺部が嵌入して一部が重合する様になっており、隣接する前記濾体７，７の円板９，９と前記スペーサ２０，２０間に形成される間隙２１が液を濾過する目となっている。又、前記濾体７には、前記円板９、前記スペーサ２０を軸心方向に貫通する濾液通路１１が形成されている。   The discs 9 and 9 of the adjacent filter bodies 7 and 7 are configured such that a peripheral portion is inserted into a gap formed by the spacer 20 and a part thereof is overlapped, and the circles of the adjacent filter bodies 7 and 7 are overlapped. A gap 21 formed between the plates 9 and 9 and the spacers 20 and 20 serves as an eye for filtering the liquid. Further, a filtrate passage 11 is formed in the filter body 7 so as to penetrate the disk 9 and the spacer 20 in the axial direction.

前記スペーサ２０の所要枚数毎に、例えば５枚毎のスペーサ２０ｂには、該スペーサ２０ｂの外周部に欠切部２２が形成され、該欠切部２２によって前記濾液通路１１が開放状態となっている。従って、濾過された濾液は、前記欠切部２２を通って前記濾液通路１１に漏出し、該濾液通路１１は漏出した濾液を前記濾体７の軸端に導き、前記脱水槽３の仕切壁２７（後述）から排出する様になっている。   For each required number of spacers 20, for example, every five spacers 20b, a notch 22 is formed in the outer periphery of the spacer 20b, and the filtrate passage 11 is opened by the notch 22. Yes. Therefore, the filtered filtrate leaks into the filtrate passage 11 through the notch 22, and the filtrate passage 11 guides the leaked filtrate to the shaft end of the filter body 7, and the partition wall of the dehydration tank 3. 27 (described later).

次に、前記濾体７の端部構造を説明する。図５中、２７は仕切壁を示し、前記側壁２５と前記仕切壁２７間には前記脱水槽３が形成され、前記仕切壁２７と前記側壁２６間には濾液貯留側室２８が形成される。   Next, the end structure of the filter body 7 will be described. In FIG. 5, reference numeral 27 denotes a partition wall, the dehydration tank 3 is formed between the side wall 25 and the partition wall 27, and a filtrate storage side chamber 28 is formed between the partition wall 27 and the side wall 26.

前記側壁２５、前記仕切壁２７、前記側壁２６間に前記回転軸８が掛渡され回転自在に設けられている。前記円板９、前記スペーサ２０により構成される前記濾体７の両端部にはフランジ２９，３０が設けられている。該フランジ２９，３０は、前記濾体７を挾持すると共に前記円板９、又は前記スペーサ２０の補強として機能している。尚、前記フランジ２９，３０には前記スペーサ２０ｂと同様、前記濾液通路１１の一部を形成する欠切部３２が形成されている。   The rotary shaft 8 is spanned between the side wall 25, the partition wall 27, and the side wall 26, and is rotatably provided. Flange 29 and 30 are provided at both ends of the filter body 7 constituted by the disk 9 and the spacer 20. The flanges 29 and 30 hold the filter body 7 and function as a reinforcement for the disk 9 or the spacer 20. The flanges 29 and 30 are formed with notches 32 that form a part of the filtrate passage 11 as in the spacer 20b.

前記濾体７の両端の前記円板９と前記スペーサ２０と前記側壁２５、前記仕切壁２７との間に間隙が生じない様にする為、前記側壁２５、前記仕切壁２７には前記フランジ２９，３０用の逃げ孔が形成されている。   In order to prevent a gap from being formed between the disk 9 at both ends of the filter body 7, the spacer 20, the side wall 25, and the partition wall 27, the side wall 25 and the partition wall 27 are provided with the flange 29. , 30 clearance holes are formed.

前記凝集装置２は凝集槽１２を有し、該凝集槽１２は凝集原液供給口１３によって前記脱水槽３に連設されている。前記凝集槽１２には原液供給ライン１４及び凝集液供給ライン１５が接続され、前記凝集槽１２には前記原液供給ライン１４から原液供給ポンプ１６により原液が供給され、又前記凝集液供給ライン１５からは凝集液供給ポンプ１７により凝集液が供給される様になっている。   The aggregating apparatus 2 has an aggregating tank 12, and the aggregating tank 12 is connected to the dehydrating tank 3 through an aggregating stock solution supply port 13. The coagulation tank 12 is connected to a stock solution supply line 14 and a coagulation liquid supply line 15. The coagulation tank 12 is supplied with a stock solution from the stock solution supply line 14 by a stock solution supply pump 16, and from the aggregate solution supply line 15. The aggregating liquid is supplied from the aggregating liquid supply pump 17.

前記凝集槽１２には攪拌機１８が設けられ、該攪拌機１８により原液と凝集液が攪拌されることで、原液中の固形分の凝集が促進される。   The agglomeration tank 12 is provided with a stirrer 18, and the agitation liquid is agitated by the agitator 18, thereby aggregating solids in the undiluted liquid.

前記原液供給ライン１４から原液、前記凝集液供給ライン１５から凝集液を供給することで、凝集原液１９が前記凝集原液供給口１３からオーバフローして前記脱水槽３に供給される。前記凝集原液１９の供給量は、前記ケーキ搬送路６の上流端部開放部に自由液面２３を形成する様に調整される。   By supplying the stock solution from the stock solution supply line 14 and the aggregate solution from the aggregate solution supply line 15, the aggregate stock solution 19 overflows from the aggregate stock solution supply port 13 and is supplied to the dehydration tank 3. The supply amount of the agglomerated stock solution 19 is adjusted so as to form a free liquid level 23 in the upstream end opening portion of the cake transport path 6.

前記ケーキ搬送路６に供給された前記凝集原液１９は、前記ケーキ搬送路６の上流部では重力による濾過により、濾液が分離され、分離された濾液の大部分は前記円板９，９間の目より落下し、残りの一部は前記濾液通路１１に漏出し、該濾液通路１１を通って前記脱水槽３から前記濾液貯留側室２８に排出される。   The agglomerated stock solution 19 supplied to the cake transport path 6 is separated into filtrates by gravity filtration at the upstream portion of the cake transport path 6, and most of the separated filtrate is between the disks 9, 9. It falls from the eyes, and the remaining part leaks into the filtrate passage 11, passes through the filtrate passage 11, and is discharged from the dehydration tank 3 to the filtrate storage side chamber 28.

又、分離された凝集フロックは、前記下部濾体群５上に着床し、前記上部濾体群４、前記下部濾体群５の回転によって下流側に搬送される。又、凝集フロックは、搬送過程で上下の前記上部濾体群４、前記下部濾体群５により圧搾され、濾液が分離されてケーキとなる。即ち、前記ケーキ搬送路６の上流部は重力脱水部、下流部は圧搾脱水部が形成される。   The separated flocs that have been separated land on the lower filter body group 5 and are conveyed downstream by the rotation of the upper filter body group 4 and the lower filter body group 5. In addition, the aggregated floc is squeezed by the upper and lower upper filter body groups 4 and the lower filter body group 5 in the conveying process, and the filtrate is separated into a cake. That is, a gravity dewatering part is formed in the upstream part of the cake conveyance path 6, and a pressing dewatering part is formed in the downstream part.

圧搾によって、分離した濾液の大半は前記円板９，９間の目を通って落下し、前記下部濾体群５の下方に落下し、残部は前記濾液通路１１に漏出し、該濾液通路１１を通って前記脱水槽３の前記側壁２５、前記仕切壁２７から排出される。   Most of the filtrate separated by the pressure falls through the eyes between the discs 9 and 9, falls below the lower filter body group 5, and the remainder leaks into the filtrate passage 11, and the filtrate passage 11 It is discharged from the side wall 25 and the partition wall 27 of the dehydration tank 3.

又、脱水されたケーキは、前記上部濾体群４、前記下部濾体群５の搬送作用により前記吐出口１０より吐出される。   Further, the dehydrated cake is discharged from the discharge port 10 by the conveying action of the upper filter body group 4 and the lower filter body group 5.

前記濾体７の回転による前記凝集原液１９の脱水が行われる場合、前記濾体７には大きな回転負荷が作用し、前記回転軸８と前記円板９、前記スペーサ２０間で前記キー部８ａ、前記キー部９ａ、前記キー部２０ａを介した大きなトルク伝達が行われる。   When the aggregation stock solution 19 is dehydrated by the rotation of the filter body 7, a large rotational load acts on the filter body 7, and the key portion 8 a is interposed between the rotating shaft 8, the disk 9, and the spacer 20. A large torque is transmitted through the key portion 9a and the key portion 20a.

前記濾体７の端に位置する前記円板９、前記スペーサ２０は、前記側壁２５、前記仕切壁２７に対して周辺部のＸ部分が摺動しつつ回転する為、摩擦により特に大きな回転負荷を受ける。   Since the disk 9 and the spacer 20 positioned at the end of the filter body 7 rotate while the peripheral X portion slides relative to the side wall 25 and the partition wall 27, a particularly large rotational load is caused by friction. Receive.

一方で前記スペーサ２０の厚みは、間隙２１の大きさを決定する。この為細かな固形分をできる限り捕捉し、濾液清澄度を向上させる為には前記スペーサ２０は可及的に薄板であることが要求される。   On the other hand, the thickness of the spacer 20 determines the size of the gap 21. Therefore, the spacer 20 is required to be as thin as possible in order to capture the fine solids as much as possible and improve the filtrate clarity.

この為、トルクの伝達部である前記キー部９ａ、前記キー部２０ａが、大きな荷重に耐えられず変形することがある。   For this reason, the key part 9a and the key part 20a, which are torque transmission parts, may not withstand a large load and may be deformed.

前記キー部９ａ、前記キー部２０ａが変形し、トルク伝達部としての機能を消滅した場合は、前記円板９、前記スペーサ２０が前記回転軸８に対して自由に回転する状態（即ち回転しない状態）となり、或は前記キー部２０ａが変形した場合は、変形した部分から割れが発生し、前記スペーサ２０が脱落する。   When the key portion 9a and the key portion 20a are deformed and the function as the torque transmitting portion disappears, the disk 9 and the spacer 20 are freely rotated with respect to the rotating shaft 8 (that is, do not rotate). When the key portion 20a is deformed, a crack is generated from the deformed portion, and the spacer 20 falls off.

前記キー部９ａ、前記キー部２０ａの変形の現象は、濾体軸方向の内側に向って伝播する可能性があり、又、前記キー部９ａ、前記キー部２０ａの回転が停止し、或は前記スペーサ２０が脱落した場合、多重円板脱水装置としての性能が低下するので、交換の為の保守作業が必要となる。特に、前記スペーサ２０を合成樹脂製とした場合は、前記キー部２０ａの変形、前記スペーサ２０の割れが起易く、保守作業の間隔が短くなり、保守費が掛ると共に多重円板脱水装置の稼働率低下の原因となる。   The deformation phenomenon of the key portion 9a and the key portion 20a may propagate inward in the filter body axis direction, and the rotation of the key portion 9a and the key portion 20a stops, or When the spacer 20 is dropped, the performance as a multiple disk dewatering device is lowered, so that maintenance work for replacement is required. In particular, when the spacer 20 is made of synthetic resin, the key portion 20a is easily deformed and the spacer 20 is easily cracked, the maintenance work interval is shortened, maintenance costs are increased, and the multiple disk dewatering device is operated. It causes the rate to decrease.

特開２００５−７３２７号公報JP 2005-7327 A

本発明は斯かる実情に鑑み、多重円板脱水装置の濾体に於ける円板、スペーサの損傷を防止し、多重円板脱水装置の性能を長期に維持し、保守費の軽減、稼働率の向上を図るものであり、又円板、スペーサのトルク伝達部に変形が生じない様に、円板、スペーサの停止、脱落を防止し、多重円板脱水装置の性能を長期に維持し、保守費の軽減、稼働率の向上を図るものである。   In view of such circumstances, the present invention prevents damage to the discs and spacers in the filter body of the multiple disk dewatering device, maintains the performance of the multiple disk dewatering device for a long period of time, reduces maintenance costs, and operates. In order to prevent the torque transmission part of the disk and spacer from being deformed, the disk and spacer are prevented from stopping and dropping off, and the performance of the multiple disk dewatering device is maintained for a long time. It is intended to reduce maintenance costs and improve operating rates.

本発明は、回転可能な回転軸に円板を、該円板より小径のスペーサを介在させ多重に嵌設して一体に回転される様構成した濾体を、前記円板の一部が重合する様所要数連設し、被脱水処理物を前記円板の重合部分の隙間から濾過する様にした濾体群を具備する多重円板脱水装置に於いて、前記濾体の前記円板、前記スペーサの集合体は濾過部を形成し、該濾過部の両端に少なくとも前記円板と前記スペーサとの厚みを加算した厚みを有し、脱水槽壁面に摺接する補強円板を設けた多重円板脱水装置に係るものである。   According to the present invention, a filter is constructed in which a disk is arranged on a rotatable rotating shaft, and a plurality of spacers having a smaller diameter than the disk are interposed so as to be rotated in an integrated manner. In a multiple disk dewatering apparatus comprising a filter body group that is provided in a required number so that the material to be dewatered is filtered from the gap between the overlapping portions of the disk, the disk of the filter body, The assembly of the spacers forms a filtration part, and has a thickness obtained by adding at least the thicknesses of the disk and the spacers at both ends of the filtration part, and a multiple circle provided with a reinforcing disk that is in sliding contact with the dehydration tank wall surface. This relates to a plate dewatering device.

又本発明は、前記補強円板の周面形状を、隣接する前記濾体の補強円板間に屈曲した間隙が形成される様にした多重円板脱水装置に係り、更に又隣接する前記濾体の補強円板の直径を異ならせた多重円板脱水装置に係るものである。   The present invention also relates to a multiple disk dewatering device in which the circumferential shape of the reinforcing disk is formed so that a bent gap is formed between the reinforcing disks of the adjacent filter bodies. The present invention relates to a multiple disk dewatering device in which the diameter of the reinforcing disk of the body is made different.

本発明によれば、回転可能な回転軸に円板を、該円板より小径のスペーサを介在させ多重に嵌設して一体に回転される様構成した濾体を、前記円板の一部が重合する様所要数連設し、被脱水処理物を前記円板の重合部分の隙間から濾過する様にした濾体群を具備する多重円板脱水装置に於いて、前記濾体の前記円板、前記スペーサの集合体は濾過部を形成し、該濾過部の両端に少なくとも前記円板と前記スペーサとの厚みを加算した厚みを有し、脱水槽壁面に摺接する補強円板を設けたので、濾過部の両端が壁面に摺接することにより生じる抵抗により前記円板、前記スペーサの損傷が防止され、円板、スペーサの交換作業を行う為の保守作業が軽減され、保守費の軽減、多重円板脱水装置の稼働率の向上が図れる。   According to the present invention, a filter body configured to be rotated integrally by inserting a disc on a rotatable rotating shaft and interposing a spacer having a smaller diameter than the disc so as to be integrally rotated is a part of the disc. In a multiple disk dewatering device comprising a filter body group in which a required number is continuously provided so as to be polymerized, and a material to be dewatered is filtered from a gap between the polymerized portions of the disk, the circle of the filter body The assembly of the plate and the spacer forms a filtration part, and has a thickness obtained by adding at least the thickness of the disk and the spacer at both ends of the filtration part, and a reinforcing disk that is in sliding contact with the wall surface of the dehydration tank is provided. Therefore, the resistance caused by sliding both ends of the filtration part against the wall surface prevents the disk and the spacer from being damaged, the maintenance work for exchanging the disk and the spacer is reduced, the maintenance cost is reduced, The operating rate of the multiple disk dewatering device can be improved.

又本発明によれば、前記補強円板の周面形状を、隣接する前記濾体の補強円板間に屈曲した間隙が形成される様にしたので、前記補強板の板厚を厚くした場合でも、補強板周面間で濾過が行われ、多重円板脱水装置の脱水濾過性能が損われない。   According to the present invention, since the circumferential shape of the reinforcing disk is formed so that a bent gap is formed between the reinforcing disks of the adjacent filter bodies, the thickness of the reinforcing plate is increased. However, filtration is performed between the reinforcing plate peripheral surfaces, and the dewatering filtration performance of the multiple disk dewatering device is not impaired.

更に又本発明によれば、隣接する前記濾体の補強円板の直径を異ならせたので、隣接する補強円板の周速度が異なり、周面間を通過する濾過液に剪断力が作用し、周面に固形部が付着することが防止される等の優れた効果を発揮する。   Furthermore, according to the present invention, since the diameters of the reinforcing discs of the adjacent filter bodies are made different, the peripheral speeds of the adjacent reinforcing discs are different, and a shearing force acts on the filtrate passing between the peripheral surfaces. It exhibits excellent effects such as preventing the solid part from adhering to the peripheral surface.

以下、図面を参照しつつ本発明を実施する為の最良の形態を説明する。   The best mode for carrying out the present invention will be described below with reference to the drawings.

尚、本発明に係る多重円板脱水装置の基本的な構造、濾過作用、脱水作用については図４で示される多重円板脱水装置と同様であるので、図４を参照し、同等の部分については説明を省略する。   The basic structure, filtering action, and dehydrating action of the multiple disk dewatering apparatus according to the present invention are the same as those of the multiple disk dewatering apparatus shown in FIG. 4, so refer to FIG. Will not be described.

図１は本発明に係る下部濾体群５の濾体７を示している。   FIG. 1 shows a filter body 7 of a lower filter body group 5 according to the present invention.

回転軸８に円板９と、スペーサ２０とが交互に嵌装され、前記濾体７が構成され、又前記円板９と前記スペーサ２０とが交互に配設された集合体は濾過部７ａとなっている。該濾過部７ａの両端に補強円板３５，３６が嵌装され、更にフランジ２９，３０が嵌合固着されている。前記濾過部７ａは、前記補強円板３５，３６を介して前記フランジ２９，３０によって挾持されている。   Disks 9 and spacers 20 are alternately fitted to the rotary shaft 8 to form the filter body 7, and an assembly in which the disks 9 and the spacers 20 are alternately arranged is a filter part 7 a. It has become. Reinforcing discs 35 and 36 are fitted to both ends of the filtration part 7a, and flanges 29 and 30 are fitted and fixed. The filtration part 7a is held by the flanges 29, 30 via the reinforcing disks 35, 36.

前記円板９は金属製であり、例えばステンレス鋼板から加工され、又前記スペーサ２０は、例えば合成樹脂成型品とすることで、厚み精度が保証され、又コストが低減する。前記補強円板３５，３６は金属製、例えばステンレス鋼製であり、該補強円板３５，３６の厚みは、前記円板９の厚みと前記スペーサ２０の厚みを加算した値と同じとなっている。   The disk 9 is made of metal and is processed from, for example, a stainless steel plate, and the spacer 20 is made of, for example, a synthetic resin molded product, so that the thickness accuracy is guaranteed and the cost is reduced. The reinforcing disks 35 and 36 are made of metal, for example, stainless steel, and the thickness of the reinforcing disks 35 and 36 is the same as the sum of the thickness of the disk 9 and the thickness of the spacer 20. Yes.

前記補強円板３５，３６は図２に見られる様に通路孔３７が穿設され、該通路孔３７は濾液通路１１の一部を構成し、又前記補強円板３５は直径Ｄ1 を有し、前記補強円板３６は直径Ｄ2 を有し、外径以外は同形状となっている。   As shown in FIG. 2, the reinforcing discs 35 and 36 have a passage hole 37 formed therein, and the passage hole 37 constitutes a part of the filtrate passage 11, and the reinforcing disc 35 has a diameter D1. The reinforcing disc 36 has a diameter D2 and has the same shape except for the outer diameter.

尚、図示では分易く、前記スペーサ２０の厚みを前記円板９と比して大きくしているが、実際には該円板９の板厚に対して僅かに大きくなっている。   In addition, although it is easy to understand in the drawing, the thickness of the spacer 20 is made larger than that of the disk 9, but in practice it is slightly larger than the thickness of the disk 9.

前記回転軸８には一部が面取りされたキー部８ａが形成され（図６参照）、前記円板９、前記スペーサ２０、前記補強円板３５，３６には前記回転軸８と嵌合する孔が穿設され、該孔には前記キー部８ａに対応して、キー部９ａ、キー部２０ａ（図６参照）、キー部３５ａが形成され、前記キー部８ａと前記キー部９ａ、前記キー部２０ａ、前記キー部３５ａを介して前記回転軸８の回転力が前記円板９、前記スペーサ２０、前記補強円板３５，３６に伝達される様になっている。   The rotary shaft 8 is formed with a chamfered key portion 8a (see FIG. 6), and the disc 9, the spacer 20, and the reinforcing discs 35 and 36 are fitted with the rotary shaft 8. A hole is formed, and a key portion 9a, a key portion 20a (see FIG. 6), and a key portion 35a are formed in the hole corresponding to the key portion 8a. The key portion 8a, the key portion 9a, The rotational force of the rotary shaft 8 is transmitted to the disk 9, the spacer 20, and the reinforcing disks 35 and 36 through the key part 20a and the key part 35a.

隣接する前記濾体７，７の円板９，９は前記スペーサ２０が形成する隙間に周辺部が嵌入して一部が重合する様になっており、隣接する前記濾体７，７の円板９，９と前記スペーサ２０，２０間に形成される間隙２１が液を濾過する目となっている。又、前記濾体７には、前記円板９、前記スペーサ２０を軸心方向に貫通する前記濾液通路１１が形成されている。   The discs 9 and 9 of the adjacent filter bodies 7 and 7 are configured such that a peripheral portion is inserted into a gap formed by the spacer 20 and a part thereof is overlapped, and the circles of the adjacent filter bodies 7 and 7 are overlapped. A gap 21 formed between the plates 9 and 9 and the spacers 20 and 20 serves as an eye for filtering the liquid. Further, the filtrate passage 11 is formed in the filter body 7 so as to penetrate the disk 9 and the spacer 20 in the axial direction.

前記補強円板３５，３６は隣接する前記濾体７，７に反対勝手に嵌装され、同じ端部では前記補強円板３５と前記補強円板３６とが対向する様になっており、前記補強円板３５の周面と前記補強円板３６の周面との間には間隙ｇが形成される様になっている。   The reinforcing discs 35 and 36 are fitted to the adjacent filter bodies 7 and 7 in the opposite direction, and the reinforcing disc 35 and the reinforcing disc 36 are opposed to each other at the same end, A gap g is formed between the peripheral surface of the reinforcing disc 35 and the peripheral surface of the reinforcing disc 36.

従って、隣接する前記濾体７，７間の軸間距離をＷとすると、ｇ＝Ｗ−（Ｄ1 ＋Ｄ2 ）／２となっている。又、前記間隙ｇは前記間隙２１と同一又は同等の値となっており、前記補強円板３５，３６の間でも濾過作用を有する。   Accordingly, if the inter-axis distance between the adjacent filter bodies 7 and 7 is W, g = W− (D1 + D2) / 2. The gap g has the same or equivalent value as the gap 21 and has a filtering action between the reinforcing disks 35 and 36.

尚、前記補強円板３５，３６の直径について、Ｄ1 ＝Ｄ2 であっても、Ｄ1 ≠Ｄ2 であってもよい。又、Ｄ1 ≠Ｄ2 とした場合は、前記前記補強円板３５，３６の周速度が異なり、前記間隙ｇを通過する濾過液に剪断力が作用し、液中の固体分が前記補強円板３５，３６の表面に付着することが抑制される。   The diameters of the reinforcing disks 35 and 36 may be D1 = D2 or D1 ≠ D2. Further, when D1 ≠ D2, the peripheral speeds of the reinforcing disks 35 and 36 are different, a shearing force acts on the filtrate passing through the gap g, and the solid content in the liquid becomes the reinforcing disk 35. , 36 is prevented from adhering to the surface.

又、従来の多重円板脱水装置と同様、前記スペーサ２０の所要枚数毎に、例えば５枚毎のスペーサ２０ｂには、該スペーサ２０ｂの外周部に欠切部２２が形成され（図６参照）、該欠切部２２によって前記濾液通路１１が開放状態となっている。従って、濾過された濾液は、前記欠切部２２を通って前記濾液通路１１に漏出し、該濾液通路１１は漏出した濾液を前記濾体７の軸端に導き、前記脱水槽３の仕切壁２７（後述）から排出する様になっている。   Similarly to the conventional multiple disk dewatering device, for each required number of spacers 20, for example, every five spacers 20b, a notch 22 is formed on the outer periphery of the spacer 20b (see FIG. 6). The filtrate passage 11 is opened by the notch 22. Therefore, the filtered filtrate leaks into the filtrate passage 11 through the notch 22, and the filtrate passage 11 guides the leaked filtrate to the shaft end of the filter body 7, and the partition wall of the dehydration tank 3. 27 (described later).

前記濾過部７ａの両端部に前記補強円板３５，３６を設けることで、側壁２５、仕切壁２７には、金属製の前記補強円板３５，３６が摺接することになる。該補強円板３５，３６は前記円板９の厚みと前記スペーサ２０の厚みを加算した厚みを持っており、前記補強円板３５，３６の前記キー部３５ａの強度は、前記円板９の前記キー部９ａ、前記スペーサ２０の前記キー部２０ａに比べ大幅に大きく、前記補強円板３５，３６と前記側壁２５、前記仕切壁２７との摩擦により生ずる回転負荷によって前記キー部３５ａが変形することが防止される。   By providing the reinforcing disks 35 and 36 at both ends of the filtering part 7a, the metal reinforcing disks 35 and 36 are in sliding contact with the side wall 25 and the partition wall 27. The reinforcing discs 35 and 36 have a thickness obtained by adding the thickness of the disc 9 and the thickness of the spacer 20. The strength of the key portion 35 a of the reinforcing discs 35 and 36 is determined by the strength of the disc 9. The key portion 35a is significantly larger than the key portion 20a of the spacer 9 and the key portion 35a is deformed by a rotational load generated by friction between the reinforcing disks 35 and 36 and the side wall 25 and the partition wall 27. It is prevented.

又、前記補強円板３５，３６は金属製であるので、前記側壁２５、前記仕切壁２７との摺接による欠け、割れが防止され、前記補強円板３５，３６の脱落が防止される。   Further, since the reinforcing disks 35 and 36 are made of metal, chipping and cracking due to sliding contact with the side wall 25 and the partition wall 27 are prevented, and the reinforcing disks 35 and 36 are prevented from falling off.

次に、前記補強円板３５と前記側壁２５、前記補強円板３６と前記仕切壁２７との間隙は回転に支障ない程度に接触していることが望まれるが、多数の前記円板９、前記スペーサ２０が嵌装されることで、誤差が累積され、端部の間隙の誤差となって現れる。   Next, it is desirable that the gaps between the reinforcing disk 35 and the side wall 25 and between the reinforcing disk 36 and the partition wall 27 are in contact with each other so as not to interfere with the rotation. When the spacer 20 is fitted, errors are accumulated and appear as gap errors at the ends.

前記補強円板３５，３６の厚みを調整することで、該補強円板３５，３６端面と前記側壁２５、前記仕切壁２７との間に間隙を設けることができる。これにより、前記補強円板３５，３６端面と前記側壁２５、前記仕切壁２７との間に生じる摩擦抵抗を少なくできるので、前記補強円板３５，３６のトルク伝達部（キー部）の耐久性は更に向上する。   By adjusting the thickness of the reinforcing disks 35 and 36, a gap can be provided between the end faces of the reinforcing disks 35 and 36 and the side wall 25 and the partition wall 27. As a result, the frictional resistance generated between the end faces of the reinforcing disks 35 and 36 and the side walls 25 and the partition walls 27 can be reduced, so that the torque transmission part (key part) of the reinforcing disks 35 and 36 is durable. Is further improved.

又、前記補強円板３５，３６は、前記円板９、前記スペーサ２０よりも厚みがあるので、例えば切削、研磨等の機械加工によって厚み調整を実行でき、前記補強円板３５，３６端面と前記側壁２５、前記仕切壁２７との間に、間隙を設け、且つその間隙を限りなく小さくできるので、該間隙から前記脱水槽３内の原液が流出することなく、適切な間隙を精度よく設けることができる。   Further, since the reinforcing discs 35 and 36 are thicker than the disc 9 and the spacer 20, the thickness can be adjusted by machining such as cutting and polishing, and the end surfaces of the reinforcing discs 35 and 36 can be adjusted. Since a gap is provided between the side wall 25 and the partition wall 27 and the gap can be made as small as possible, an appropriate gap can be provided with high accuracy without causing the stock solution in the dehydration tank 3 to flow out of the gap. be able to.

尚、前記補強円板３５，３６の厚みは、前記円板９の厚みと前記スペーサ２０の厚みを加算した厚みより大きくてもよい。   The thickness of the reinforcing discs 35 and 36 may be larger than the sum of the thickness of the disc 9 and the thickness of the spacer 20.

又、前記補強円板３５，３６の周面は図３（Ａ）の様に傾斜してもよい。更に図３（Ｂ）、図３（Ｃ）は、前記補強円板３５，３６の周面の形状を変更し、前記補強円板３５の周面と前記補強円板３６の周面とが間隙を介在して相互に出入りする様になっている。   The peripheral surfaces of the reinforcing disks 35 and 36 may be inclined as shown in FIG. Further, in FIGS. 3B and 3C, the shape of the peripheral surfaces of the reinforcing disks 35 and 36 is changed so that the peripheral surface of the reinforcing disk 35 and the peripheral surface of the reinforcing disk 36 are spaced apart. It is designed to go in and out of each other.

図３（Ｂ）に示す、前記補強円板３５，３６では周面の形状を相互に、反対勝手の段差形状とし、前記補強円板３５と前記補強円板３６間でクランク状に屈曲した間隙３８が形成される様にしたものであり、前記補強円板３５，３６間でも濾過が行える様にしたものである。   In the reinforcing disks 35 and 36 shown in FIG. 3 (B), the circumferential surfaces have mutually opposite steps, and a gap bent in a crank shape between the reinforcing disk 35 and the reinforcing disk 36. 38 is formed, and filtration can be performed between the reinforcing disks 35 and 36.

又図３（Ｃ）に示す、前記補強円板３５，３６では前記補強円板３５の周面に凹溝３９を形成し、前記補強円板３６の周面に前記凹溝３９に入込む突条４０を形成したものである。更に、前記凹溝３９、前記突条４０を複数形成し、ジグザク状の間隙４１が形成される様にしてもよい。   Further, in the reinforcing disks 35 and 36 shown in FIG. 3C, a groove 39 is formed on the peripheral surface of the reinforcing disk 35, and the protrusion that enters the concave groove 39 on the peripheral surface of the reinforcing disk 36. The article 40 is formed. Further, a plurality of the concave grooves 39 and the protrusions 40 may be formed so that a zigzag gap 41 is formed.

本発明の実施の形態の要部を示す一部断面した平面図である。It is the top view which carried out the partial cross section which shows the principal part of embodiment of this invention. 該実施の形態に用いられる補強円板の正面図である。It is a front view of the reinforcement disc used for this embodiment. （Ａ）（Ｂ）（Ｃ）は該補強円板の周面形状の変更例を示す説明図である。(A) (B) (C) is explanatory drawing which shows the example of a change of the surrounding surface shape of this reinforcement disc. 多重円板脱水装置の一例を示す概略斜視図である。It is a schematic perspective view which shows an example of a multiple disc dehydrator. 該多重円板脱水装置の下部濾体群の一部を示す平面図である。It is a top view which shows a part of lower filter body group of this multiple disc dehydrator. 図５のＡ−Ａ矢視図である。It is an AA arrow line view of FIG.

符号の説明Explanation of symbols

１ 多重円板脱水機
５ 下部濾体群
７ 濾体
７ａ 濾過部
８ 回転軸
９ 円板
９ａ キー部
１１ 濾液通路
２０ スペーサ
２０ａ キー部
２１ 間隙
３５ 補強円板
３５ａ キー部
３６ 補強円板
３７ 通路孔 DESCRIPTION OF SYMBOLS 1 Multiple disk dehydrator 5 Lower filter body group 7 Filter body 7a Filter part 8 Rotating shaft 9 Disk 9a Key part 11 Filtrate passage 20 Spacer 20a Key part 21 Gap 35 Reinforcement disk 35a Key part 36 Reinforcement disk 37 Passage hole

Claims (3)

回転可能な回転軸に円板を、該円板より小径のスペーサを介在させ多重に嵌設して一体に回転される様構成した濾体を、前記円板の一部が重合する様所要数連設し、被脱水処理物を前記円板の重合部分の隙間から濾過する様にした濾体群を具備する多重円板脱水装置に於いて、前記濾体の前記円板、前記スペーサの集合体は濾過部を形成し、該濾過部の両端に少なくとも前記円板と前記スペーサとの厚みを加算した厚みを有し、脱水槽壁面に摺接する補強円板を設けたことを特徴とする多重円板脱水装置。   A filter body configured to be rotated integrally by inserting a disk on a rotatable rotating shaft and interposing multiple spacers with a spacer having a smaller diameter than the disk is required so that a part of the disk overlaps. In a multiple disk dewatering apparatus comprising a filter body group that is continuously provided and filters a material to be dewatered from a gap between overlapping portions of the disk, the disk of the filter body, a set of the spacers The body forms a filtration part, and has a thickness obtained by adding at least the thickness of the disk and the spacer at both ends of the filtration part, and a reinforcing disk that is in sliding contact with the wall surface of the dehydration tank is provided. Disc dehydrator. 前記補強円板の周面形状を、隣接する前記濾体の補強円板間に屈曲した間隙が形成される様にした請求項１の多重円板脱水装置。   The multiple disk dewatering device according to claim 1, wherein a circumferential space of the reinforcing disk is formed such that a bent gap is formed between the reinforcing disks of the adjacent filter bodies. 隣接する前記濾体の補強円板の直径を異ならせた請求項１又は請求項２の多重円板脱水装置。   The multiple disk dewatering device according to claim 1 or 2, wherein the diameters of the reinforcing disks of the adjacent filter bodies are different.
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