JP7492927B2 - centrifuge - Google Patents

centrifuge Download PDF

Info

Publication number
JP7492927B2
JP7492927B2 JP2021016991A JP2021016991A JP7492927B2 JP 7492927 B2 JP7492927 B2 JP 7492927B2 JP 2021016991 A JP2021016991 A JP 2021016991A JP 2021016991 A JP2021016991 A JP 2021016991A JP 7492927 B2 JP7492927 B2 JP 7492927B2
Authority
JP
Japan
Prior art keywords
bowl
inner body
section
rotation axis
discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2021016991A
Other languages
Japanese (ja)
Other versions
JP2022120224A (en
Inventor
収二郎 名越
達也 田中
寛幸 松井
章裕 山本
俊哉 北風
宏治 藤嶋
勝也 平野
正士 上刎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Hiroshima Metal and Machinery Co Ltd
Original Assignee
Kubota Corp
Hiroshima Metal and Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp, Hiroshima Metal and Machinery Co Ltd filed Critical Kubota Corp
Priority to JP2021016991A priority Critical patent/JP7492927B2/en
Publication of JP2022120224A publication Critical patent/JP2022120224A/en
Application granted granted Critical
Publication of JP7492927B2 publication Critical patent/JP7492927B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Centrifugal Separators (AREA)
  • Treatment Of Sludge (AREA)

Description

本発明は遠心分離機に関し、ボウル内の保守技術に係るものである。 The present invention relates to a centrifuge and to maintenance technology within the bowl.

従来、例えば下水処理過程で発生する汚泥を処理する装置として、遠心脱水機や遠心濃縮機等の遠心分離機がある。 Conventionally, centrifuges such as centrifugal dehydrators and centrifugal thickeners have been used to treat sludge generated during sewage treatment processes.

遠心脱水機は、汚泥を高速回転させることで、固形分と水分を比重差によって分離し、脱水するものである。例えば特許文献１に記載するものは、直胴型遠心脱水装置であり、ボウルとボウル内に配置するスクリューコンベアを有し、スクリューコンベアの回転胴の外周面が、ストレート部とストレート部から径大方向に傾斜したテーパー部からなり、回転胴のストレート部の内周面に無機凝集剤を供給する無機凝集剤供給経路を設けている。 A centrifugal dehydrator separates solids and water due to the difference in specific gravity by rotating sludge at high speed, and dehydrates it. For example, the one described in Patent Document 1 is a straight-body type centrifugal dehydrator that has a bowl and a screw conveyor placed inside the bowl, and the outer circumferential surface of the rotating body of the screw conveyor consists of a straight section and a tapered section that is inclined in the radial direction from the straight section, and an inorganic flocculant supply path is provided to supply an inorganic flocculant to the inner circumferential surface of the straight section of the rotating body.

ボウルは、一端側に分離液排出口を有し、他端側に脱水ケーキ排出口を有し、回転胴のテーパー部の終端付近から脱水ケーキ排出口まで隘路の隙間排出部を有している。 The bowl has a separated liquid outlet at one end and a dehydrated cake outlet at the other end, and has a narrow gap discharge section from near the end of the tapered part of the rotating drum to the dehydrated cake outlet.

特開２０１７－１３１８４７Patent Publication 2017-131847

上記の遠心脱水機において、下水汚泥のスラリーを無機凝集剤とともに、ボウル内に投入し、高速回転するボウル内で固液分離する。分離した固形物は、スクリューによって脱水ケーキ排出口に向けて搬送する間に脱水し、隙間排出部を通してボウルの外へ排出する。ケーキ層の含水率はボウル内の液深方向において一様ではなく、ボウル内周面側のケーキ層下部に近いほどに含水率が低下する。また、隙間排出部の隘路により与える排出抵抗力が大きいほどに、ケーキ層に加わる圧縮力が強くなる。 In the above centrifugal dehydrator, sewage sludge slurry is placed in the bowl together with an inorganic coagulant, and solid-liquid separation occurs inside the bowl as it rotates at high speed. The separated solids are dehydrated while being transported by the screw toward the dehydrated cake discharge outlet, and are discharged outside the bowl through the gap discharge section. The moisture content of the cake layer is not uniform along the liquid depth direction in the bowl, and the moisture content decreases closer to the bottom of the cake layer on the inner periphery of the bowl. In addition, the greater the discharge resistance provided by the narrow passage in the gap discharge section, the stronger the compressive force applied to the cake layer.

しかし、汚泥の性状によっては圧縮力が過剰に作用して、低含水率ケーキが隙間排出部に詰まり、脱水ケーキによる閉塞が生じる。 However, depending on the properties of the sludge, excessive compressive force can occur, causing low-moisture content cake to clog the gap discharge section, resulting in blockage by dehydrated cake.

ボウルの内部を保守する場合には、ボウルの分解等を伴う工数の多い作業が必要となり、遠心脱水機の設置現場においてボウルを開放することは困難であり、ボウル内の汚泥堆積状況を視認して把握することができない。 Maintenance of the inside of the bowl requires labor-intensive work such as disassembling the bowl, and it is difficult to open the bowl at the installation site of the centrifugal dehydrator, making it impossible to visually check and grasp the sludge accumulation condition inside the bowl.

遠心脱水機は、通常の運転管理として運転停止時に洗浄工程を実施し、機内を洗浄する。しかし、隙間排出部が低含水率ケーキで閉塞した場合には、通常の洗浄工程を実施しても隙間排出部に詰まった脱水ケーキを洗い出すことは困難である。 As part of normal operational management, a cleaning process is carried out when the centrifugal dehydrator is shut down to clean the inside of the machine. However, if the gap discharge section becomes clogged with low-moisture content cake, it is difficult to wash out the dehydrated cake stuck in the gap discharge section even when the normal cleaning process is carried out.

本発明は上記した課題を解決するものであり、隙間排出部の閉塞解除や清掃等の保守管理を容易に行うことができる遠心分離機を提供することを目的とする。 The present invention aims to solve the above problems and provide a centrifuge that can easily perform maintenance such as unblocking and cleaning of the gap discharge section.

上記課題を解決するために、本発明の遠心分離機は、回転軸心廻りに回転するボウルと、前記ボウルの回転軸心方向で前記ボウルの一端側に設けた分離液排出口と、前記ボウルの回転軸心方向で前記ボウルの他端側に設けた脱水ケーキ排出口と、前記ボウルと同回転軸心廻りに回転するスクリューコンベアを備え、前記ボウルは、内周面が前記ボウルの回転軸心方向に伸びるボウル分離部と、前記ボウル分離部から前記脱水ケーキ排出口に向けて内周面がテーパー状に狭まるボウル排出部を有し、前記スクリューコンベアは、内胴と内胴外周に螺旋状に設けた羽根を有し、前記内胴は、前記ボウル分離部に対応して外周面が前記内胴の回転軸心方向に伸びる内胴分離部と、前記ボウル排出部に対応して前記脱水ケーキ排出口に向けて外周面がテーパー状に狭まる内胴排出部を有し、前記ボウル排出部の内周面と前記内胴排出部の外周面の間に隙間排出部を有し、前記ボウルが前記隙間排出部に臨む位置に保守用開孔を有し、前記保守用開孔を塞ぐプラグを着脱自在に設けたことを特徴とする。 In order to solve the above problems, the centrifuge of the present invention comprises a bowl that rotates around a rotation axis, a separated liquid outlet provided at one end of the bowl in the direction of the rotation axis of the bowl, a dehydrated cake outlet provided at the other end of the bowl in the direction of the rotation axis of the bowl, and a screw conveyor that rotates around the same rotation axis as the bowl, and the bowl has a bowl separation section whose inner circumferential surface extends in the direction of the rotation axis of the bowl, and a bowl discharge section whose inner circumferential surface tapers from the bowl separation section toward the dehydrated cake outlet, The screw conveyor has an inner body and blades arranged in a spiral shape on the outer periphery of the inner body, the inner body has an inner body separation section whose outer periphery extends in the direction of the rotation axis of the inner body corresponding to the bowl separation section, and an inner body discharge section whose outer periphery narrows in a tapered shape toward the dehydrated cake discharge port corresponding to the bowl discharge section, a gap discharge section is provided between the inner periphery of the bowl discharge section and the outer periphery of the inner body discharge section, a maintenance opening is provided at a position where the bowl faces the gap discharge section, and a plug is provided detachably to close the maintenance opening.

本発明の遠心分離機において、前記内胴は、前記内胴分離部から前記内胴排出部に向けて外周面がテーパー状に広がる内胴圧縮部を有することを特徴とする。 In the centrifuge of the present invention, the inner body has an inner body compression section whose outer circumferential surface tapers from the inner body separation section toward the inner body discharge section.

本発明の遠心分離機において、前記保守用開孔および前記プラグは、前記ボウルの周方向の複数個所に設けたことを特徴とする。 The centrifuge of the present invention is characterized in that the maintenance holes and plugs are provided at multiple locations around the circumference of the bowl.

本発明の遠心分離機において、前記保守用開孔および前記プラグは、前記ボウル分離部と前記ボウル排出部の境の近傍に位置することを特徴とする。 In the centrifuge of the present invention, the maintenance hole and the plug are located near the boundary between the bowl separation section and the bowl discharge section.

本発明の実施の形態における遠心分離機を示す断面図FIG. 1 is a cross-sectional view showing a centrifuge according to an embodiment of the present invention. 同実施の形態における保守用開孔およびプラグを示すボウル軸心方向の断面図FIG. 2 is a cross-sectional view of the bowl axis showing the maintenance hole and the plug in the embodiment. 同実施の形態における保守用開孔およびプラグを示すボウル径方向の断面図FIG. 2 is a radial cross-sectional view of the bowl showing the maintenance hole and the plug in the embodiment. 同実施の形態における保守用開孔およびプラグを示すボウル軸心方向の断面図FIG. 2 is a cross-sectional view of the bowl axis showing the maintenance hole and the plug in the embodiment. 同実施の形態における保守用開孔およびプラグを示すボウル径方向の断面図FIG. 2 is a radial cross-sectional view of the bowl showing the maintenance hole and the plug in the embodiment; 本発明の他の実施の形態における遠心分離機を示す断面図FIG. 11 is a cross-sectional view showing a centrifuge according to another embodiment of the present invention.

本発明の実施の形態に係る遠心分離機を図面に基づいて説明する。
（構造）
図１において、遠心分離機１００は、円筒直胴状のボウル１０６とボウル１０６の内部に配置する内胴１０７とを同心状に有し、ボウル１０６が軸受け部１０５ａ、１０５ｂを介して内胴１０７の回転軸心方向の両端の回転軸部１０７ａ、１０７ｂを回転可能に支持しており、同心状に配置されたボウル１０６と内胴１０７は同じ回転軸心廻りに回転可能であり、油圧モータ（図示省略）により内胴１０７がボウル１０６に対して所定の差速で回転する。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A centrifuge according to an embodiment of the present invention will be described with reference to the drawings.
(structure)
In FIG. 1, centrifuge 100 has a cylindrical bowl 106 and an inner body 107 arranged inside bowl 106, which are concentrically arranged. Bowl 106 rotatably supports rotating shaft portions 107a, 107b at both ends in the direction of the rotation axis of inner body 107 via bearing portions 105a, 105b. Bowl 106 and inner body 107, which are arranged concentrically, can rotate around the same rotation axis, and inner body 107 rotates at a predetermined differential speed relative to bowl 106 by a hydraulic motor (not shown).

内胴１０７は内胴外周に回転軸心の周りに螺旋状に設けた羽根１０８を有してスクリューコンベア１０９を構成している。 The inner barrel 107 has blades 108 arranged spirally around the rotation axis on the outer periphery of the inner barrel, forming a screw conveyor 109.

ボウル１０６は、回転軸心方向の一端側に分離液排出口１１２を有し、他端側に脱水ケーキ排出口１１３を有しており、内周面が回転軸心方向に伸びる円筒直胴状のボウル分離部１３０と、ボウル分離部１３０から脱水ケーキ排出口１１３に向けて内周面がテーパー状に狭まるボウル排出部１４０を有している。 The bowl 106 has a separated liquid outlet 112 at one end in the direction of the rotation axis and a dehydrated cake outlet 113 at the other end. It also has a bowl separation section 130 with a cylindrical straight body shape whose inner circumferential surface extends in the direction of the rotation axis, and a bowl discharge section 140 whose inner circumferential surface tapers from the bowl separation section 130 toward the dehydrated cake outlet 113.

ボウル分離部１３０は、回転軸心方向の一端側が主として分離した水分の分離液が滞留する分離液領域部１１０であり、回転軸心方向の他端側が主として分離した固形分の脱水ケーキを移送する脱水ケーキ領域部１１１である。 The bowl separation section 130 has a separated liquid area 110 on one end side in the direction of the rotation axis where the separated liquid, which is mainly water, accumulates, and a dehydrated cake area 111 on the other end side in the direction of the rotation axis where the dehydrated cake, which is mainly the separated solid content, is transported.

分離液排出口１１２は、ボウル１０６の回転軸心方向の一端側の端部壁の複数個所に設けており、回転軸心から等距離の位置に、かつ回転軸心廻りに所定間隔で配置している。各分離液排出口１１２には越流堰をなすダムプレート（図示省略）が各分離液排出口の開口の一部を覆って装着されている。 The separated liquid discharge ports 112 are provided at multiple locations on the end wall on one end side of the rotation axis direction of the bowl 106, and are arranged at equal distances from the rotation axis and at predetermined intervals around the rotation axis. A dam plate (not shown) forming an overflow weir is attached to each separated liquid discharge port 112, covering part of the opening of each separated liquid discharge port.

ダムプレートは、ボウル１０６のボウル径方向における位置を調整することにより、分離液の上限水位となる分離液排出口１１２での堰高さを設定する。脱水ケーキ排出口１１３は回転軸心を中心とする放射状の複数個所に、かつ回転軸心廻りに所定間隔で配置されている。 The dam plate adjusts the radial position of the bowl 106 to set the dam height at the separated liquid outlet 112, which is the upper limit of the separated liquid level. The dehydrated cake outlets 113 are arranged at multiple locations radially around the rotation axis and at predetermined intervals around the rotation axis.

内胴１０７は、外周面が回転軸心方向に伸びる内胴分離部１５０と、外周面がボウルの他端側に向けてテーパー状に広がる内胴圧縮部１６０と、内胴圧縮部１６０から脱水ケーキ排出口１１３に向けて外周面がテーパー状に狭まる内胴排出部１７０を有する。 The inner body 107 has an inner body separation section 150 whose outer circumferential surface extends in the direction of the rotation axis, an inner body compression section 160 whose outer circumferential surface tapers toward the other end of the bowl, and an inner body discharge section 170 whose outer circumferential surface tapers from the inner body compression section 160 toward the dehydrated cake discharge port 113.

ボウル排出部１４０の内周面と内胴排出部１７０の外周面の間が隘路の隙間排出部１８０をなし、隙間排出部１８０により脱水ケーキ領域部１１１と脱水ケーキ排出口１１３が連通している。 The gap discharge section 180 is a narrow passage between the inner peripheral surface of the bowl discharge section 140 and the outer peripheral surface of the inner body discharge section 170, and the gap discharge section 180 connects the dehydrated cake area section 111 to the dehydrated cake discharge port 113.

ボウル１０６は、隙間排出部１８０に臨む位置、ここではボウル分離部１３０とボウル排出部１４０の境の近傍の位置に、保守用開孔１９０を有しており、保守用開孔１９０にプラグ２００を着脱自在に設けている。保守用開孔１９０およびプラグ２００は、ボウル１０６の周方向の複数個所に設けている。 The bowl 106 has a maintenance opening 190 at a position facing the gap discharge section 180, in this case near the boundary between the bowl separation section 130 and the bowl discharge section 140, and a plug 200 is provided in the maintenance opening 190 so that it can be easily attached and detached. The maintenance openings 190 and plugs 200 are provided at multiple locations around the circumference of the bowl 106.

ここでは、保守用開孔１９０に座繰り部１９１とネジ穴１９２を形成し、プラグ２００に座繰り部１９１に埋まる頭部２０１とネジ穴１９２に螺合するネジ軸２０２を形成し、プラグ２００が保守用開孔１９０に螺合結合している。 Here, a countersunk portion 191 and a screw hole 192 are formed in the maintenance opening 190, a head portion 201 that fits into the countersunk portion 191 and a screw shaft 202 that screws into the screw hole 192 are formed in the plug 200, and the plug 200 is screwed into the maintenance opening 190.

また、保守用開孔１９０とプラグ２００は、図４および図５に示す構成とすることも可能である。すなわち、保守用開孔１９０に座繰り部１９１と貫通孔１９３を形成し、プラグ２００に座繰り部１９１に埋まる頭部２０１と貫通孔１９３に挿入する軸部２０３を形成し、プラグ２００を保守用開孔１９０に挿入する。そして、頭部２０１に形成した通し孔２０４に固定ネジ２０５を挿入し、ボウル１０６に形成した通しネジ孔２０６に固定ネジ２０５を螺合させて、プラグ２００をボウル１０６にネジ固定している。 The maintenance opening 190 and the plug 200 can also be configured as shown in Figures 4 and 5. That is, a countersunk portion 191 and a through hole 193 are formed in the maintenance opening 190, a head portion 201 that fits into the countersunk portion 191 and a shaft portion 203 that is inserted into the through hole 193 are formed in the plug 200, and the plug 200 is inserted into the maintenance opening 190. Then, a fixing screw 205 is inserted into a through hole 204 formed in the head 201, and the fixing screw 205 is screwed into a through screw hole 206 formed in the bowl 106, thereby fixing the plug 200 to the bowl 106.

汚泥供給管１２０は、分離液領域部１１０の側の回転軸部１０６ａを貫通して内胴１０７の内部に挿入されており、先端開口１２０ａが内胴１０７の汚泥投入部１２１に連通している。薬剤供給管１２２は、汚泥供給管１２０の外側に二重管状に配置しており、先端開口１２２ａが内胴１０７の汚泥投入部１２１に連通している。 The sludge supply pipe 120 is inserted into the inner body 107 through the rotating shaft 106a on the side of the separation liquid region 110, and the tip opening 120a is connected to the sludge input section 121 of the inner body 107. The chemical supply pipe 122 is arranged in a double pipe shape on the outside of the sludge supply pipe 120, and the tip opening 122a is connected to the sludge input section 121 of the inner body 107.

内胴１０７の汚泥投入部１２１に対応する周壁には、分離液領域部１１０の内部に向けて開口する複数の汚泥投入口１２１ａが回転軸心を中心とする放射状の位置に、かつ回転軸心廻りに所定間隔で配置されている。
（運転）
以上の構成においては、原汚泥を、汚泥供給管１２０を通して高速回転する内胴１０７の汚泥投入部１２１に供給するとともに、高分子凝集剤を、薬剤供給管１２２を通して高速回転する内胴１０７の汚泥投入部１２１に供給して混合し、原汚泥と高分子凝集剤の混合汚泥（スラリー）を汚泥投入部１２１の汚泥投入口１２１ａから高速回転するボウル１０６の内部に投入する。 On the peripheral wall corresponding to the sludge inlet section 121 of the inner body 107, a plurality of sludge inlet ports 121a opening toward the inside of the separation liquid area section 110 are arranged in radial positions around the rotation axis and at predetermined intervals around the rotation axis.
(driving)
In the above configuration, raw sludge is supplied through sludge supply pipe 120 to sludge input section 121 of the inner body 107, which rotates at high speed, and polymer coagulant is supplied through chemical supply pipe 122 to the sludge input section 121 of the inner body 107, which rotates at high speed, and mixed, and the mixed sludge (slurry) of raw sludge and polymer coagulant is fed into the inside of the bowl 106, which rotates at high speed, from the sludge input port 121a of the sludge input section 121.

ボウル１０６の内部で凝集した汚泥フロックを含む混合汚泥は、遠心力を受けて比重差により分離液と脱水ケーキとに固液分離される。ボウル１０６と回転数差（差速）をもつスクリューコンベア１０９が脱水ケーキを分離液領域部１１２から脱水ケーキ領域部１１１に移送する。脱水ケーキは、内胴圧縮部１６０を移動する間に圧縮されて含水率がさらに低下し、隙間排出部１８０を通って脱水ケーキ排出口１１３からボウル１０６の外部へ排出される。 The mixed sludge containing the aggregated sludge flocs inside the bowl 106 is subjected to centrifugal force and separated into separated liquid and dehydrated cake due to the difference in specific gravity. A screw conveyor 109, which has a rotational speed difference (differential speed) with the bowl 106, transports the dehydrated cake from the separated liquid area 112 to the dehydrated cake area 111. The dehydrated cake is compressed while moving through the inner body compression section 160, further reducing its moisture content, and is discharged from the gap discharge section 180 to the outside of the bowl 106 through the dehydrated cake discharge outlet 113.

分離液は、ボウル１０６の分離液排出口１１２からダムプレートを越流してボウル１０６の外部へ排出される。
（保守管理）
隙間排出部１８０が閉塞した場合等の保守管理時には、プラグ２００を外して保守用開孔１９０を開放する。保守用開孔１９０は、ボウル１０６の隙間排出部１８０に臨む位置にあるので、保守用開孔１９０を通して隙間排出部１８０の脱水ケーキの堆積状態を視認し、把握することができる。そして、隙間排出部１８０に詰まった脱水ケーキを洗い流す洗浄作業を保守用開孔から行うことができ、機体の分解作業等を行うことなく保守管理を実施できる。 The separated liquid flows through separated liquid discharge port 112 of bowl 106 , over the dam plate, and is discharged to the outside of bowl 106 .
(Maintenance management)
During maintenance, such as when the gap discharge portion 180 becomes clogged, the plug 200 is removed to open the maintenance opening 190. Since the maintenance opening 190 is located facing the gap discharge portion 180 of the bowl 106, the accumulated state of dehydrated cake in the gap discharge portion 180 can be visually confirmed and understood through the maintenance opening 190. Furthermore, a cleaning operation for washing out the dehydrated cake clogged in the gap discharge portion 180 can be performed through the maintenance opening, and maintenance can be performed without disassembling the machine.

図６は、本発明の他の実施の形態を示すものであり、先の実施の形態と同様の作用を行う部材には同符号を付して説明を省略する。 Figure 6 shows another embodiment of the present invention, in which the same reference numerals are used to designate components that perform the same functions as those in the previous embodiment, and their explanations are omitted.

本実施の形態では、先の実施の形態における内胴圧縮部１６０が存在せず、内胴１０７は、ボウル分離部１３０に対応して外周面が回転軸心方向に伸びる内胴分離部１５０と、ボウル排出部１４０に対応して脱水ケーキ排出口１１３に向けて外周面がテーパー状に狭まる内胴排出部１７０からなる。内胴分離部１５０は内胴排出部１７０に続く終端において外径が内胴排出部１７０の最大外径にまで拡がっている。 In this embodiment, the inner body compression section 160 of the previous embodiment does not exist, and the inner body 107 is composed of an inner body separation section 150 whose outer circumferential surface extends in the direction of the rotation axis corresponding to the bowl separation section 130, and an inner body discharge section 170 whose outer circumferential surface tapers toward the dehydrated cake discharge port 113 corresponding to the bowl discharge section 140. The outer diameter of the inner body separation section 150 expands to the maximum outer diameter of the inner body discharge section 170 at the end following the inner body discharge section 170.

１０５ａ、１０５ｂ 軸受け部
１０６ ボウル
１０６ａ、１０６ｂ 回転軸部
１０７ 内胴
１０７ａ、１０７ｂ 回転軸部
１０８ 羽根
１０９ スクリューコンベア
１１０ 分離液領域部
１１１ 脱水ケーキ領域部
１１２ 分離液排出口
１１３ 脱水ケーキ排出口
１２０ 汚泥供給管
１２０ａ 先端開口
１２１ 汚泥投入部
１２１ａ 汚泥投入口
１２２ 薬剤供給管
１２２ａ 先端開口
１３０ ボウル分離部
１４０ ボウル排出部
１５０ 内胴分離部
１６０ 内胴圧縮部
１７０ 内胴排出部
１８０ 隙間排出部
１９０ 保守用開孔
１９１ 座繰り部
１９２ ネジ穴
１９３ 貫通孔
２００ プラグ
２０１ 頭部
２０２ ネジ軸
２０３ 軸部
２０４ 通し孔
２０５ 固定ネジ
２０６ ネジ孔 105a, 105b Bearing section 106 Bowl 106a, 106b Rotating shaft section 107 Inner body 107a, 107b Rotating shaft section 108 Blade 109 Screw conveyor 110 Separated liquid area section 111 Dehydrated cake area section 112 Separated liquid discharge outlet 113 Dehydrated cake discharge outlet 120 Sludge supply pipe 120a Tip opening 121 Sludge input section 121a Sludge input port 122 Chemical supply pipe 122a Tip opening 130 Bowl separation section 140 Bowl discharge section 150 Inner body separation section 160 Inner body compression section 170 Inner body discharge section 180 Gap discharge section 190 Maintenance opening 191 Counterbore section 192 Screw hole 193 Through hole 200 Plug 201 Head section 202 Screw shaft 203 Shaft section 204 Through hole 205 Fixing screw 206 Screw hole

Claims (4)

回転軸心廻りに回転するボウルと、前記ボウルの回転軸心方向で前記ボウルの一端側に設けた分離液排出口と、前記ボウルの回転軸心方向で前記ボウルの他端側に設けた脱水ケーキ排出口と、前記ボウルと同回転軸心廻りに回転するスクリューコンベアを備え、
前記ボウルは、内周面が前記ボウルの回転軸心方向に伸びるボウル分離部と、前記ボウル分離部から前記脱水ケーキ排出口に向けて内周面がテーパー状に狭まるボウル排出部を有し、
前記スクリューコンベアは、内胴と内胴外周に螺旋状に設けた羽根を有し、
前記内胴は、前記ボウル分離部に対応して外周面が前記内胴の回転軸心方向に伸びる内胴分離部と、前記ボウル排出部に対応して前記脱水ケーキ排出口に向けて外周面がテーパー状に狭まる内胴排出部を有し、
前記ボウル排出部の内周面と前記内胴排出部の外周面の間に隙間排出部を有し、
前記ボウルが前記隙間排出部に臨む位置に保守用開孔を有し、前記保守用開孔を塞ぐプラグを着脱自在に設けたことを特徴とする遠心分離機。 the separating apparatus comprises a bowl that rotates about a rotation axis, a separated liquid discharge outlet provided at one end of the bowl in the direction of the rotation axis of the bowl, a dehydrated cake discharge outlet provided at the other end of the bowl in the direction of the rotation axis of the bowl, and a screw conveyor that rotates about the same rotation axis as the bowl,
The bowl has a bowl separation portion whose inner circumferential surface extends in a direction of a rotation axis of the bowl, and a bowl discharge portion whose inner circumferential surface tapers from the bowl separation portion toward the dehydrated cake discharge port,
The screw conveyor has an inner body and a blade provided in a spiral shape on the outer periphery of the inner body,
the inner body has an inner body separation portion having an outer peripheral surface extending in a direction of a rotation axis of the inner body corresponding to the bowl separation portion, and an inner body discharge portion having an outer peripheral surface tapered toward the dehydrated cake discharge port corresponding to the bowl discharge portion,
A gap discharge portion is provided between the inner peripheral surface of the bowl discharge portion and the outer peripheral surface of the inner body discharge portion,
a maintenance hole is provided at a position where the bowl faces the clearance discharge portion, and a plug is detachably provided for closing the maintenance hole. 前記内胴は、前記内胴分離部から前記内胴排出部に向けて外周面がテーパー状に広がる内胴圧縮部を有することを特徴とする請求項１に記載の遠心分離機。 The centrifuge according to claim 1, characterized in that the inner body has an inner body compression section whose outer circumferential surface tapers from the inner body separation section toward the inner body discharge section. 前記保守用開孔および前記プラグは、前記ボウルの周方向の複数個所に設けたことを特徴とする請求項１または２に記載の遠心分離機。 The centrifuge according to claim 1 or 2, characterized in that the maintenance holes and the plugs are provided at multiple locations around the circumference of the bowl. 前記保守用開孔および前記プラグは、前記ボウル分離部と前記ボウル排出部の境の近傍に位置することを特徴とする請求項１から３の何れか１項に記載の遠心分離機。 The centrifuge according to any one of claims 1 to 3, characterized in that the maintenance hole and the plug are located near the boundary between the bowl separation section and the bowl discharge section.
JP2021016991A 2021-02-05 2021-02-05 centrifuge Active JP7492927B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021016991A JP7492927B2 (en) 2021-02-05 2021-02-05 centrifuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021016991A JP7492927B2 (en) 2021-02-05 2021-02-05 centrifuge

Publications (2)

Publication Number Publication Date
JP2022120224A JP2022120224A (en) 2022-08-18
JP7492927B2 true JP7492927B2 (en) 2024-05-30

Family

ID=82849101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021016991A Active JP7492927B2 (en) 2021-02-05 2021-02-05 centrifuge

Country Status (1)

Country Link
JP (1) JP7492927B2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000350948A (en) 1999-06-09 2000-12-19 Tomoe Engineering Co Ltd Method for cleaning rotary cylinder of horizontal shaft tubular type centrifugal separator
JP2002239416A (en) 2001-02-21 2002-08-27 Kubota Corp Centrifugal separator
JP2017131847A (en) 2016-01-29 2017-08-03 株式会社クボタ Centrifugal separator
JP2020097027A (en) 2019-11-13 2020-06-25 株式会社クボタ centrifuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000350948A (en) 1999-06-09 2000-12-19 Tomoe Engineering Co Ltd Method for cleaning rotary cylinder of horizontal shaft tubular type centrifugal separator
JP2002239416A (en) 2001-02-21 2002-08-27 Kubota Corp Centrifugal separator
JP2017131847A (en) 2016-01-29 2017-08-03 株式会社クボタ Centrifugal separator
JP2020097027A (en) 2019-11-13 2020-06-25 株式会社クボタ centrifuge

Also Published As

Publication number Publication date
JP2022120224A (en) 2022-08-18

Similar Documents

Publication Publication Date Title
JP5191565B2 (en) Centrifugal dehydration method and centrifugal dehydration apparatus
CA2090644C (en) Decanter centrifuge having discontinuous flights in the beach area
US4267035A (en) Pressurized rotary screening apparatus
JP6619247B2 (en) centrifuge
JP6814865B2 (en) centrifuge
KR19990072358A (en) Dehydrating concentrator
KR200392737Y1 (en) Decanter centrifuge
JP6751564B2 (en) centrifuge
EP0839226B1 (en) Method and device for treating a pulp suspension
KR100968113B1 (en) the liquid and the solid separator of a sludge with a continuous scraper in a separate scraper room
JP7492927B2 (en) centrifuge
JP2009142791A (en) Screw press with concentration function
RU2004139021A (en) SCREW CENTRIFUGE WITH A CONTINUOUS ROTOR, CONTAINING A CUTTING DISC, AND METHOD OF OPERATING IT
FI65766B (en) CENTRIFUG MED TVAO CONCENTRATE TRUMMOR FOR AVVATTNING AV SLAM
JP4669217B2 (en) Solid-liquid separator
JP6230240B2 (en) centrifuge
JP6700934B2 (en) Centrifugal dehydrator and operating method
KR20190124878A (en) Oil spill system for automobile parts cleaning wastewater
US20220234053A1 (en) Solid bowl screw centrifuge
Alt Centrifuges for sludge treatment
JP2700522B2 (en) Decanter for sludge dewatering
US20190375178A1 (en) Device for continuously pressing liquid out of a suspension
RU2458744C2 (en) Auger centrifuge
KR101982628B1 (en) Energy-saving centrifuge using efficient filtrate output
JP2002331395A (en) Screw press type dehydration device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230607

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20240326

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

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20240423

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20240520

R150 Certificate of patent or registration of utility model

Ref document number: 7492927

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150