JP7483198B2 - Solid-liquid separation equipment using filter aids - Google Patents
Solid-liquid separation equipment using filter aids Download PDFInfo
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- JP7483198B2 JP7483198B2 JP2020184063A JP2020184063A JP7483198B2 JP 7483198 B2 JP7483198 B2 JP 7483198B2 JP 2020184063 A JP2020184063 A JP 2020184063A JP 2020184063 A JP2020184063 A JP 2020184063A JP 7483198 B2 JP7483198 B2 JP 7483198B2
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- 238000000926 separation method Methods 0.000 title claims description 24
- 239000007788 liquid Substances 0.000 title claims description 17
- 239000007787 solid Substances 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 6
- 239000012466 permeate Substances 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000003475 lamination Methods 0.000 description 5
- 238000011068 loading method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Description
本発明は、生活排水や工場排水などの被処理水に含まれている懸濁物質を分離除去するろ過助材を用いた固液分離装置に関する。 The present invention relates to a solid-liquid separation device using a filter aid for separating and removing suspended solids contained in water to be treated, such as domestic wastewater or industrial wastewater.
従来、被処理水中の微細な懸濁物質を分離除去する固液分離装置として、ドラム表面にろ布を張り、ろ過助材をプリコートしてろ過を行う真空脱水機が知られている。
また、引用文献１には、被処理水に磁性を有する磁性粉を加え、化学反応あるいは凝集剤によって被処理水中の汚濁物を磁性粒子に吸着させて磁性フロックを形成し、磁場発生装置にてドラム外周上のろ過面上に付着させて固液分離を行う技術が開示されている。
2. Description of the Related Art Conventionally, as a solid-liquid separation device for separating and removing fine suspended solids from water to be treated, a vacuum dehydrator is known in which filtration is performed by stretching a filter cloth on the surface of a drum and pre-coating it with a filter aid.
Furthermore, Cited Document 1 discloses a technology in which magnetic powder having magnetic properties is added to the water to be treated, and contaminants in the water to be treated are adsorbed onto the magnetic particles through a chemical reaction or a coagulant to form magnetic flocs, which are then attached to the filtration surface on the outer periphery of a drum using a magnetic field generating device to perform solid-liquid separation.
一般的に、珪藻土等の微細粒子をろ過助材としてプリコートした真空脱水機は、精密ろ過が可能であり、ろ過された被処理水中の懸濁物質はプリコート上に堆積する。掻き取り装置にて懸濁物質を除去する際に、懸濁物質と同時にプリコート層の表層を掻き取るため、回収する固形物量が増加し、固形物を処理する後処理の負担が増大していた。また、プリコート層が掻き取られて脱水性能を満足しないほど薄くなると、被処理水の供給を停止してろ過助材を投入し、プリコート層を新たに所定の厚みになるよう形成し直す必要があった。 Generally, vacuum dehydrators precoated with fine particles such as diatomaceous earth as a filter aid are capable of precision filtration, and suspended solids in the filtered water are deposited on the precoat. When removing suspended solids using a scraping device, the surface layer of the precoat layer is scraped off at the same time as the suspended solids, increasing the amount of solids to be recovered and increasing the burden on post-processing of the solids. Furthermore, when the precoat layer becomes too thin to satisfy dewatering performance, it is necessary to stop the supply of water to be treated, add filter aid, and then re-form the precoat layer to the specified thickness.
特許文献１に記載される固液分離装置は、回収する固形物側に磁性を付与してろ過面上に付着させるものであるが、磁性フロックを形成させるために磁性粉を添加するので、回収固形物量が増加する。回収した固形物が磁性を帯びているので、搬送する際に取扱いに手間を要し、処分方法によっては注意が必要となる。 The solid-liquid separation device described in Patent Document 1 imparts magnetism to the recovered solids so that they adhere to the filtration surface, but because magnetic powder is added to form magnetic flocs, the amount of recovered solids increases. Because the recovered solids are magnetic, they are difficult to handle when transported, and care must be taken depending on the disposal method.
本発明は、磁性を付与したろ過助材でプリコートし、固形物の回収時にプリコートろ材と懸濁物質を分離し、ろ過助材をプリコートろ材として再利用するろ過助材を用いた固液分離装置を提供する。 The present invention provides a solid-liquid separation device that uses a filter aid that is precoated with a magnetic filter aid, separates the precoated filter medium from suspended solids when recovering solids, and reuses the filter aid as the precoated filter medium .
本発明は、ろ布表面に磁性を付与した不定形ろ過助材を所定の厚さだけ積層し、ろ過・脱水ゾーンにてろ過助材を透過可能な液分をドラム内部に吸引して外部に排出するとともに、ろ過助材を透過できない懸濁物質をろ過助材の表面に堆積させるプリコート式真空脱水機において、プリコート層の表層に近い一部のろ過助材をプリコート層で捕捉した懸濁物質と共に連続的に掻き取る剥離手段と、懸濁物質とろ過助材とを分離する分離手段と、ろ過助材を回収する回収手段と、ろ過助材を真空脱水機の積層手段に送る返送手段と、剥離手段とろ過・脱水ゾーンとの間でドラムに張設したろ布に向かって下方向に傾斜して先端部がプリコート層の設定厚となる位置に設置した積層板上に返送されたろ過助材が連続的にろ布表面に残留するプリコート層上に再積層する積層手段と、を備えるもので、容易にプリコートしたろ過助材を捕捉した懸濁物質から分離・回収し、固液分離装置に返送・再積層することで再利用可能である。 The present invention is a precoat type vacuum dehydrator in which a magnetic amorphous filter aid is laminated to a predetermined thickness on the surface of a filter cloth, and the liquid that can permeate the filter aid in the filtration / dehydration zone is sucked into the drum and discharged to the outside, and suspended matter that cannot permeate the filter aid is deposited on the surface of the filter aid. In this precoat type vacuum dehydrator, a peeling means is provided for continuously scraping off a part of the filter aid near the surface of the precoat layer together with the suspended matter captured by the precoat layer, a separation means for separating the suspended matter and the filter aid, a recovery means for recovering the filter aid, a return means for sending the filter aid to the lamination means of the vacuum dehydrator, and a lamination means for continuously re-laminating the filter aid returned to the lamination plate installed at a position between the peeling means and the filtration / dehydration zone, which is inclined downward toward the filter cloth stretched on the drum and has a tip that is the set thickness of the precoat layer, on the precoat layer that remains on the surface of the filter cloth. The precoated filter aid can be easily separated and recovered from the captured suspended matter, and returned to the solid-liquid separation device and re-laminated, making it possible to reuse the precoated filter aid.
分離手段は、分離槽と攪拌装置と磁気ロールで構成し、磁気ロールは、上ロールと下ロールに掛け回したベルトと、ベルト内周面に付設した磁気板と、ベルトからろ過助材を剥離する掻取装置と、を備えるので、回収固形物からろ過助材と懸濁物質を容易に分離可能であり、懸濁物質の搬送・処分に手間を要しない。 The separation means is composed of a separation tank, a stirring device, and a magnetic roll. The magnetic roll is equipped with a belt wrapped around an upper roll and a lower roll, a magnetic plate attached to the inner surface of the belt, and a scraping device that peels the filter aid from the belt. This makes it easy to separate the filter aid and suspended matter from the recovered solids, and does not require effort in transporting or disposing of the suspended matter.
本発明は、粒径の小さいろ過助材に磁性を付与してプリコートするため、安定した精密ろ過運転が可能となる。また、ろ過助材に磁性を付与させているため、回収固形物からろ過助材と懸濁物質との分離が容易であり、回収固形物量が増加することなく、懸濁物質の搬送・処分に手間が掛からない。さらに、ろ過助材をプリコートろ材として再利用可能である。真空脱水機に適用すると被処理液のろ過運転だけでなく、ろ過助材の分離・回収・再利用が連続的に実現できる。 The present invention makes it possible to perform stable precision filtration operation by imparting magnetism to small particle size filter aids and pre-coating them. In addition, because the filter aids are made magnetic, the filter aids and suspended matter can be easily separated from the recovered solids, and the amount of recovered solids does not increase, making it easy to transport and dispose of the suspended matter. Furthermore, the filter aids can be reused as pre-coated filter media. When applied to a vacuum dehydrator, not only can the filter operation of the treated liquid be performed, but the separation, recovery, and reuse of the filter aids can also be continuously achieved.
図１は、本発明に係る真空脱水機を用いたシステム図であり、図２は真空脱水機の要部詳細図である。
原液を満たした原液槽１と、原液槽１に下側を浸漬させて回転自在に支架している円筒体のドラム２とを備えている。ドラム２の円周面は多孔性の支持床３で構成してあり、その上にろ布４を張設している。ドラム２の内部には吸引管５を連通させており、真空ポンプ６により吸引管５を介してドラム２内を減圧させている。
FIG. 1 is a system diagram using a vacuum dehydrator according to the present invention, and FIG. 2 is a detailed view of the main parts of the vacuum dehydrator.
The apparatus comprises a stock solution tank 1 filled with stock solution, and a
ろ布４の表面には粒状のろ過助材７により所定の厚さだけプリコート層８を形成してあり、原液槽１に供給された原液はドラム２内の減圧によりドラム２に向かって吸引される。プリコート層８を透過可能な液分はドラム２内部に吸引されて外部に排出するとともに、プリコート層８を透過できない懸濁物質はプリコート層８の表面に堆積する。
A precoat layer 8 is formed on the surface of the
＜剥離手段＞
ドラム２は所定の回転数にて矢印方向に回転しており、原液槽１内でプリコート層８の表面に堆積した懸濁物質は大気下で自重による重力分離を経た後、剥離手段Ｓ１によって掻き取られる。この時、プリコート層８の表層に近い一部のろ過助材７が懸濁物質とともに剥離手段Ｓ１によって掻き取られ、後段の分離槽１０に排出される。本実施例では剥離手段Ｓ１としてスクレーパ９を用いているが、他の手段を適用してもよい。
<Removal Means>
The
＜ろ過助材＞
プリコート層８を形成する粒状のろ過助材７には、フェライト法、共沈型担磁法、高分子添加型担磁法、マグネタイト担磁法、表面収着型担磁法等の公知の手段にて磁性を付与している。
<Filtering aid>
The granular filter aid 7 forming the precoat layer 8 is made magnetic by known means such as the ferrite method, co-precipitation type magnetic loading method, polymer additive type magnetic loading method, magnetite magnetic loading method, surface adsorption type magnetic loading method, etc.
ろ過助材７としては、例えば、灰石膏、パーライト、活性炭、ビーズ等、種々の材質が使用可能であるが、粒径が１００μｍ以下で多孔質な珪藻土を使用することが望ましい。 Various materials can be used as the filter aid 7, such as gypsum, perlite, activated carbon, beads, etc., but it is preferable to use porous diatomaceous earth with a particle size of 100 μm or less.
＜分離手段＞
剥離手段Ｓ１によって掻き取られた懸濁物質とプリコート層８の一部のろ過助材７は後段の分離手段Ｓ２にて懸濁物質とろ過助材７とに分離される。
<Separation Means>
The suspended matter and a part of the filter aid 7 of the precoat layer 8 scraped off by the peeling means S1 are separated into the suspended matter and the filter aid 7 by the separating means S2 in the subsequent stage.
本実施例では、分離槽１０と攪拌装置１１と磁気ロール１２で分離手段Ｓ２を構成している。具体的には、分離槽１０に排出されたろ過助材７と懸濁物質は公知の攪拌装置１１により攪拌しつつ、磁性体を有する磁気ロール１２にてろ過助材７を吸着して懸濁物質と分離している。 In this embodiment, the separation means S2 is composed of a separation tank 10, an agitator 11, and a magnetic roll 12. Specifically, the filter aid 7 and suspended matter discharged into the separation tank 10 are agitated by a known agitator 11, while the filter aid 7 is adsorbed by a magnetic roll 12 having a magnetic body and separated from the suspended matter.
図３は磁気ロール１２の縦断面図であって、磁気ロール１２は上ロール１３と下ロール１４に掛け回した無端状のベルト１５で構成した磁気ロール１２であり、少なくとも一方のロールを駆動することでベルト１５を周回させている。上ロール１３から下ロール１４に亘ってベルト１５内周面に磁気板１６を付設してあり、磁気板１６の磁力によりベルト１５の外周面にろ過助材７を吸着させる。ろ過助材７はベルト１５の外周面に吸着した状態で上ロール１３側に搬送され、掻取装置１７によりベルト１５表面から剥離する。必要に応じて各ロールに磁力を付与してもよい。 Figure 3 is a vertical cross-sectional view of the magnetic roll 12, which is composed of an endless belt 15 wound around an upper roll 13 and a lower roll 14, and the belt 15 is rotated by driving at least one of the rolls. A magnetic plate 16 is attached to the inner surface of the belt 15 from the upper roll 13 to the lower roll 14, and the filter aid 7 is attracted to the outer surface of the belt 15 by the magnetic force of the magnetic plate 16. The filter aid 7 is transported to the upper roll 13 while being attracted to the outer surface of the belt 15, and is peeled off from the surface of the belt 15 by a scraping device 17. Magnetic force may be applied to each roll as necessary.
攪拌装置１１は羽根車を機械的に回転させるパドル式攪拌やエアーを供給して攪拌する空気式撹拌式等、公知の攪拌装置を使用できる。また、必要に応じて攪拌時に希釈水を供給してもよい。 The stirring device 11 may be a known stirring device such as a paddle type stirring device that mechanically rotates an impeller or an air type stirring device that stirs by supplying air. Dilution water may be supplied during stirring as necessary.
懸濁物質は分離槽１０の下方に設けた排出管から外部に排出される。外部に排出する際に、磁性体によりろ過助材７を回収してもよい。 The suspended solids are discharged to the outside through a discharge pipe provided below the separation tank 10. When the suspended solids are discharged to the outside, the filter aid 7 may be recovered by a magnetic body.
＜回収手段＞
分離手段Ｓ２にて分離されたろ過助材７は回収手段Ｓ３に搬送される。本実施例では、回収手段Ｓ３を回収槽１８で構成しており分離したろ過助材７を貯留している。回収槽１８では必要に応じて洗浄、殺菌を行ってもよい。本実施例では回収手段Ｓ３として独立設置した回収槽１８を用いているが、ろ過助材７の回収量が少量の場合は、搬送用のポンプ１９等に連設するシュートを回収槽１８としてもよい。
<Collection methods>
The filter aid 7 separated by the separation means S2 is transported to the recovery means S3. In this embodiment, the recovery means S3 is configured with a recovery tank 18, which stores the separated filter aid 7. The recovery tank 18 may be cleaned or sterilized as necessary. In this embodiment, an independently installed recovery tank 18 is used as the recovery means S3, but when the amount of recovered filter aid 7 is small, a chute connected to a
＜返送手段＞
回収手段Ｓ３にて回収されたろ過助材７は、返送手段Ｓ４にて真空脱水機に返送される。本実施例では、返送手段Ｓ４をポンプ１９と返送管２０にて構成している。回収槽１８内のろ過助材７をポンプ１９にて圧送し、返送管２０を介して搬送する。本実施例では返送手段Ｓ４としてポンプ１９および返送管２０を用いているが、ベルトコンベア等の公知の返送手段Ｓ４を適用してもよい。
<Return method>
The filter aid 7 recovered by the recovery means S3 is returned to the vacuum dehydrator by the return means S4. In this embodiment, the return means S4 is composed of a
＜積層手段＞
ろ過助材７は返送手段Ｓ４を介して積層手段Ｓ５に搬送される。積層手段Ｓ５は真空脱水機に設けてあり、真空脱水機のプリコート層８にろ過助材７を連続的に積層している。具体的には、真空脱水機の剥離手段Ｓ１（スクレーパ９）とろ過・脱水ゾーンとの間に設置してあり、プリコート層８から懸濁物質を剥離する際に設定厚より薄くなったプリコート層８を再積層するものである。
<Lamination Means>
The filter aid 7 is transported to the laminating means S5 via the return means S4. The laminating means S5 is provided in the vacuum dehydrator and continuously laminates the filter aid 7 on the precoat layer 8 of the vacuum dehydrator. Specifically, it is installed between the peeling means S1 (scraper 9) of the vacuum dehydrator and the filtration/dehydration zone, and re-laminates the precoat layer 8 that has become thinner than the set thickness when suspended solids are peeled off from the precoat layer 8 .
図４に示すように、本実施例では、積層板２１上にろ過助材７を返送し、傾斜した積層板２１上をろ過助材７が自重で移動することにより連続的にプリコート層８に再吸着させている。 As shown in Figure 4, in this embodiment, the filter aid 7 is returned onto the laminate plate 21, and the filter aid 7 moves by its own weight on the inclined laminate plate 21, so that it is continuously re-adsorbed onto the precoat layer 8.
積層板２１はプリコート層８に向かって下方向に傾斜しており、先端部がプリコート層８の設定厚となる位置に設置している。剥離手段Ｓ１により薄くなったプリコート層８に、磁力と吸引力により分離・回収したろ過助材７を連続的に吸着させるとともに、プリコート層８の厚みが設定厚以上にならないよう積層板２１の先端部にて調整する。 The laminate plate 21 is inclined downward toward the precoat layer 8, and is positioned so that its tip is at the set thickness of the precoat layer 8. The filter aid 7 separated and recovered by magnetic and suction forces is continuously attracted to the precoat layer 8, which has been thinned by the peeling means S1, and the thickness of the precoat layer 8 is adjusted at the tip of the laminate plate 21 so that it does not exceed the set thickness.
常時、新しいプリコート層８を原液に浸漬させることで安定した連続ろ過が可能となり、清澄度の高い処理水が得られる。 By constantly immersing a new precoat layer 8 in the raw solution, stable continuous filtration is possible, resulting in highly clear treated water.
本実施例では、磁性を付与したろ過助材７を真空脱水機のプリコート層８として用いているが、例えば、キャンドルフィルター、リーフフィルター、フィルタープレス等の固液分離装置のプリコート材として適用可能である。 In this embodiment, the magnetic filter aid 7 is used as the precoat layer 8 of a vacuum dehydrator, but it can also be used as a precoat material for solid-liquid separation devices such as candle filters, leaf filters, and filter presses.
本発明は、食品・医薬品・化学薬品・石油産業等、粒径の小さい懸濁物質を含む被処理水を固液分離する精密ろ過を必要とする産業に適用でき、プリコート材の再利用による廃棄物の低減が可能で、環境配慮型の固液分離装置となるものである。 The present invention can be applied to industries that require precision filtration to separate solids and liquids from treated water that contains small suspended solids, such as the food, pharmaceutical, chemical, and petroleum industries, and can reduce waste by reusing precoat materials, making it an environmentally friendly solid-liquid separation device.
７ ろ過助材
８ プリコート層
１０ 分離槽
１１ 撹拌装置
１２ 磁気ロール
１３ 上ロール
１４ 下ロール
１５ ベルト
１６ 磁気板
１７ 掻取装置
Ｓ１ 剥離手段
Ｓ２ 分離手段
Ｓ３ 回収手段
Ｓ４ 返送手段
Ｓ５ 積層手段
7: filter aid 8: precoat layer 10: separation tank 11: agitator 12: magnetic roll 13: upper roll 14: lower roll 15: belt 16: magnetic plate 17: scraper S1: peeling means S2: separation means S3: recovery means S4: return means S5: lamination means
Claims (2)
プリコート層の表層に近い一部のろ過助材（７）をプリコート層（８）で捕捉した懸濁物質と共に連続的に掻き取る剥離手段（Ｓ１）と、
懸濁物質とろ過助材（７）とを分離する分離手段（Ｓ２）と、
ろ過助材（７）を回収する回収手段（Ｓ３）と、
ろ過助材（７）を真空脱水機の積層手段（Ｓ５）に送る返送手段（Ｓ４）と、
剥離手段（Ｓ１）とろ過・脱水ゾーンとの間でドラムに張設したろ布に向かって下方向に傾斜して先端部がプリコート層（８）の設定厚となる位置に設置した積層板（２１）上に返送されたろ過助材（７）が連続的にろ布表面に残留するプリコート層（８）上に再積層する積層手段（Ｓ５）と、を備える
ことを特徴とする真空脱水機。 In a precoat type vacuum dehydrator, a magnetic amorphous filter aid (7) is laminated to a predetermined thickness on the surface of a filter cloth , and in a filtration and dehydration zone, liquid that can permeate the filter aid (7) is sucked into a drum (2) and discharged to the outside, while suspended solids that cannot permeate the filter aid (7) are deposited on the surface of the filter aid (7) ,
A peeling means (S1) for continuously scraping off a part of the filter aid (7) near the surface of the precoat layer together with the suspended matter captured by the precoat layer (8);
A separation means (S2) for separating the suspended matter and the filter aid (7);
A recovery means (S3) for recovering the filter aid (7);
A return means (S4) for sending the filter aid (7) to a stacking means (S5) of a vacuum dehydrator;
and a laminating means (S5) for continuously re-laminating the filter aid (7) returned onto a laminating plate (21) disposed between the peeling means (S1) and the filtration/dehydration zone at a position inclined downward toward a filter cloth stretched on a drum so that its tip portion corresponds to a set thickness of the precoat layer (8), on the precoat layer (8) remaining on the surface of the filter cloth.
分離槽（１０）と攪拌装置（１１）と磁気ロール（１２）で構成し、
磁気ロール（１２）は、
上ロール（１３）と下ロール（１４）に掛け回したベルト（１５）と、
ベルト（１５）内周面に付設した磁気板（１６）と、
ベルト（１５）からろ過助材（７）を剥離する掻取装置（１７）と、を備える
ことを特徴とする請求項１に記載の真空脱水機。 The separating means (S2)
The apparatus is composed of a separation tank (10), a stirring device (11), and a magnetic roll (12),
The magnetic roll (12) is
A belt (15) wound around the upper roll (13) and the lower roll (14);
A magnetic plate (16) attached to the inner peripheral surface of the belt (15);
2. The vacuum dehydrator according to claim 1, further comprising a scraping device (17) for peeling off the filter aid (7) from the belt (15).
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| JP2013146717A (en) | 2012-01-23 | 2013-08-01 | Toshiba Corp | Water treatment method and water treatment apparatus |
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| JP2005058959A (en) | 2003-08-19 | 2005-03-10 | Sony Corp | Dust collector |
| JP2006231291A (en) | 2005-02-28 | 2006-09-07 | Akihiko No | Magnet filter |
| JP2013146717A (en) | 2012-01-23 | 2013-08-01 | Toshiba Corp | Water treatment method and water treatment apparatus |
| JP2018085938A (en) | 2016-11-28 | 2018-06-07 | 清水建設株式会社 | Algae-containing liquid concentration method, algae recovery method, algae concentration system and algae recovery system |
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