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JP2004174467A - Vertical continuous solid-liquid separator and recovered plastic separation process - Google Patents

Vertical continuous solid-liquid separator and recovered plastic separation process Download PDF

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Publication number
JP2004174467A
JP2004174467A JP2002347087A JP2002347087A JP2004174467A JP 2004174467 A JP2004174467 A JP 2004174467A JP 2002347087 A JP2002347087 A JP 2002347087A JP 2002347087 A JP2002347087 A JP 2002347087A JP 2004174467 A JP2004174467 A JP 2004174467A
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Japan
Prior art keywords
screen cylinder
solid
communicating
port
plastic
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JP2002347087A
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Japanese (ja)
Inventor
Megumi Tanaka
惠 田中
Toshisuke Tanaka
敏資 田中
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Tanaka Ltd
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Tanaka Ltd
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Priority to JP2002347087A priority Critical patent/JP2004174467A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0286—Cleaning means used for separation
    • B29B2017/0289—Washing the materials in liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/065—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts containing impurities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/008—Wide strips, e.g. films, webs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Cyclones (AREA)
  • Filtration Of Liquid (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently separate a mixture of washing water and recovered plastics in a recycling process of recovered plastics containing film-like thin pieces. <P>SOLUTION: A vertical continuous solid-liquid separator comprises: a cylindrical casing 1; a screen cylinder 2 fixedly provided in the casing 1; a rotor 3 with attached rotary blades 4 and mounted in the screen cylinder 2; a plastics supplying port 5 communicating with the lower part of the screen cylinder 2; a separated plastics taking out port 6 communicating with the upper part of the screen cylinder 2; and a separated washing water discharging port 8 communicating with the lower part of a ring-like space 7 between the casing 1 and the screen cylinder 2. A lower part air-intake port 9 communicating with the lower part of the screen cylinder 2 and an air discharging port 10 communicating with a middle part of a ring-like cross sectional space 7 are provided to make air flow into the casing. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明が属する技術分野】
本発明は、竪型連続固液分離装置及び回収プラスチックのリサイクル工程における回収プラスチックの固液分離方法に関する。本発明に係る竪形連続固液分離装置は、とくにフィルム状薄片プラスチックの含有率が高い分別回収されたプラスチックのリサイクル工程において、水又は洗浄水が混在し、あるいは水又は洗浄水が付着している分別回収プラスチックの薄片を含むプラスチックから水又は洗浄水を分離するのに好適である。
【０００２】
【従来の技術】
竪形連続固液分離装置は、構造が簡単で使いやすく故障が少なく能率が高いために多くの分野で広く用いられている。まず、図１を参照しつつ、従来の竪形連続固液分離装置について簡単に説明する。図１には内部構造を含む固液分離装置の概略が例示されている。
【０００３】
竪形ケーシング１の内側に固液を分離するためのスクリーン筒２が所要の間隔をおいてケーシング１に固定されている。そして、スクリーン筒２の内側に表面に回転羽根４を取付けたローター３が装着され、運転中は、このローター３を高速回転させる。分離しようとする固液を含む混合物をスクリーン筒２下部の供給口５からスクリーン筒２の内側へ供給する。固液は、高速回転するローター３の遠心力でスクリーン筒２の内面に押付けられ、液体はスクリーン２外側へと通り抜け、固体は内側に残されて固体と液体とが分離される。内側に残った固体は、回転羽根４で掻き上げられつつ、スクリーン筒２内をローター３との間隙を通って上方へと送られ、スクリーン筒２上部に連通する固体取出口６から取出される。一方、スクリーン筒２を通り抜けた液体は、スクリーン筒２とケーシング１との間の空間部７を下降し、ケーシング１下部に連通する液体の排出口８から排出される。この形式の固液分離機は、従来から合成繊維原料や成形プラスチック原料ペレット製造工程においてペレットに付着する水を分離する目的で多数使用されていた。
【０００４】
ところで最近、プラスチックのリサイクル利用が次第に実用段階に入ってきた。とくに容器包装に使用されたペットボトルをはじめとする各種の使用済プラスチック類が一般家庭から分別回収され、そのリサイクル利用が図られるようになった。前記の使用済プラスチック類には、金属、ガラス、土砂などの無機物、紙、油脂類、リサイクルの障害となる異種プラスチックなどの有機物が異物として混在し、あるいは付着しているので、リサイクル過程においては所要のプラスチックとこれら異物とを分離する必要がある。
【０００５】
【発明が解決しようとする課題】
大部分が使用済のポリ袋やポリびんなどからなる回収プラスチックは、まずふるい分け、磁気選別や手作業により混在する土砂、鉄類、ガラスびんなどの異物を分離除去した後、残る異物を分離するために適当な大きさに破砕され、順次、付着し混在する汚れや異物が所要のレベル以下になるまで洗浄され、異物から分離される。この過程において回収プラスチックには、何度か脱水あるいは脱液する必要が生じる。そこで手軽で故障の少ないところから、プラスチックペレットの脱水などに実績のある前記の竪形連続固液分離器が、破砕された回収プラスチックの洗浄や混在する水の分離に多く採用されるようになった。
【０００６】
ところが、実際に使用してみると前記固液分離機の脱水能力が当初想定したレベルにまで到達せず、むしろ工程中のネックになることが判った。水などが付着した前記プラスチック薄片の一部が、一時的にスクリーン筒内面にへばり付いてスクリーンを閉塞し液体の通過を妨げ、回転羽根により掻き上げられにくくなって元来発揮できる筈の固液分離能力を低下させるのである。これに代わる遠心脱水、通気乾燥など他の手段を検討し、あるいは試験したがこれに優る適当な手段は見出されなかった。そこで、竪型連続固液分離機を用いて水などの液体と混在するプラスチック薄片から固液分離能力を低下させることなく、液体を分離できる手段の有無をに検討した結果、本発明が完成されたものである。
【０００７】
【課題を解決するための手段】
前記の課題を解決するために本発明は、竪形筒状のケーシング１と、前記ケーシング内に固定されたスクリーン筒２と、スクリーン筒２内に装着された表面に回転羽根４の取付けられている回転ローター３と、スクリーン筒２内の下部に連通して設けた固液を含む被分離物の供給口５と、スクリーン筒２内上部に連通して設けられた分離固体の取出口６と、ケーシング１とスクリーン筒２との間に形成さた断面がリング状の空間７下部に連通する分離液体の排出口８と、を含んで構成された竪形連続固液分離装置において、スクリーン筒２内下部に連通して外部から気体を導入するための下部吸気口９、および前記リング状空間７の中程に連通する排気口１０が設けられていることを特徴とする竪型連続固液分離装置を提供する。
【０００８】
前記の竪型連続固液分離装置は、供給口１６を分離固体の取出口６に連通させて取り付けたサイクロン１２と、吸気側に排気口１０及びサイクロンの排気口１３を接続させた吸気ファン１４とを含めて構成しておくと便利である。また、操作条件によっては、スクリーン筒２上部に連通して、外部から気体を導入するための上部吸気口１１を設けるとよい。そして好ましくは、吸気ファン１４の吸気側と、排気口１０及び前記サイクロンの排気口１３とを接続する２本の配管系に、それぞれ流量調整機構１５を設けておく。
【０００９】
本発明の竪連続固液分離装置は、回収プラスチックのリサイクル工程において、従来からの課題であった水又は洗浄水が混在する回収プラスチックから回収プラスチックを分離するのにきわめて好適である。回収プラスチックのリサイクル工程においては、サイクロン排気口１３からの吸気量に対して排気口１０からの吸気量を０．６〜２倍の範囲内において調整するとよい。
【００１０】
【発明の実施の形態】
以下に本発明の実施の形態を、図面を参照しつつ、さらに具体的に説明する。図１は、本発明に係る竪型連続固液分離機（以下、固液分離装置と略称する）を例示する説明図である。
【００１１】
本発明は、前記の課題を解決するために前記の固液分離装置を用いて試行錯誤を繰り返した結果、混在するプラスチック薄片の種類や大きさなどの条件や、スクリーンの種類や目開き、ローターの回転数などの設定条件がからまって同じではないものの、スクリーン筒内に大量の気体（通常は空気）を流通させることによってプラスチック薄片のへばり付きが実質的に皆無、もしくは減少し、水や汚れを含んだ洗浄水などの液体からプラスチックを分離する処理能率が高くなることが判った。その理由は確定的ではないが、スクリーン筒内のプラスチック薄片に付着する例えば水が、吸引又は吹き込まれた空気により剥離されあるいは蒸発し、一定量以下になってプラスチック薄片のスクリーン内面へのへばり付きがなくなり、回転羽根により容易に掻き取られ掻き上げられてスクリーン筒内を上昇し、固体取出口の方へと移動しやすくなったものと考えられる。
【００１２】
本発明に係る固液分離装置の構造、作用について詳しく説明する。本発明固液分離装置においては、竪形のスクリーン筒２内に大量の気体（通常は空気）を流通させるために、ケーシング１の底部もしくは下部にスクリーン筒２内下部に連通する下部吸気口９を、ケーシング１中程に新たにケーシング１とスクリーン筒２との間の断面リング状空間７から機外に連通する排気口１０を設ける。
【００１３】
そして、例えば水、洗浄水などの液体、ときには気体が混在する、フィルム状のプラスチック薄片を含む回収プラスチックを、供給口５からスクリーン筒２内に連続的に供給する。その際、気体が同伴することもあるが特別の問題はない。下部吸気口９からスクリーン筒２内に大量の、例えば空気を吸引又は送入する。
【００１４】
供給された回収プラスチック等は、高速回転するローター３により攪拌され洗浄水等によって汚れを分離されながら、遠心力でスクリーン筒２の内面に押付けられ、洗浄水等の液体は汚れと共にスクリーン２外側へと通り抜け、固体の回収プラスチックは内側に残される。残された固体は、回転羽根４で掻き上げられつつ、スクリーン筒２内をローター３との間隙を通って上方へと送られ、スクリーン筒２上部に連通する固体取出口６から取出される。
【００１５】
吸気口９から送入された空気はスクリーン筒２に薄片プラスチック等が付着するのを防止しつつ、その一部は排気口１０から、残りは液体から分離された薄片プラスチック等と共に上部の固体取出口６から系外に排出される。通常、固体取出口６には固気分離用サイクロン１２の供給口１６を接続して、固体取出口６から取り出された薄片を含む回収プラッスチックを空気と共に導入し、回収プラスチックと空気とを分離する。
【００１６】
スクリーン筒２内に供給する空気量は、装置や操作条件によって異なるので、適宜に調整し最適条件を求めて設定するとよい。一例をあげると、標準処理量が１００ｋｇ／ｈｒの固液分離機では、５〜１０ｍ３／ｈｒ程度、標準処理量が１０００ｋｇ／ｈｒの固液分離機では２０〜３０ｍ３／ｈｒ程度（いずれも損失頭約３００ｍｍＡｑ）が適当である。排出口６近辺への付着が多い場合には、別途スクリーン筒２内の上部に連通する上部吸気口１１を設けて適量を通気するとよい。また、固液分離機の吸気口９及び１１には外界からの異物が混入しないように、好ましくはフィルターを取り付ける。
【００１７】
本発明固液分離機の性能を十二分に発揮させるには、通常、分離固体取出口６にこれと連通するする固気分離サイクロン１２を取り付け、排気口６及び前記サイクロンの排気口１３に接続する吸気ファン１４を設けて固液分離機を吸気側で作動させる。そして、望ましくは固液分離機排気口１０及びサイクロンの排気口１３から排出される空気量比を調整する。それぞれの配管系に流量調整機構、例えばダンパー１５を取り付けるとよい。勿論、それぞれの配管系に低静圧、大風量の吸引ブロワー、例えばプレートファンやシロッコファンを取り付けて調整してもよい。本発明においては、必要により本発明の効果を阻害しない限り、前記した以外の機器や部材を組み合わせて利用することができる。
【００１８】
本発明に係る固液分離機は、繰り返し破砕プラスチック薄片を洗浄、脱水する分別回収プラスチックのリサイクル工程において極めて好適に使用できる。前記リサイクル工程に使用する場合、混在する水量などによって異なるが、一般に固サイクロン排気口１３からの吸気量に対し液分離機排気口１０からの吸気量比を０．６〜２倍の範囲内で調整するとよい。
【００１９】
【発明の効果】
本発明の利用によって、ペットボトルや各種の使用済プラスチック類の分別回収工程における破砕プラスチック、プラスチック加工現場における切断屑など、水と混在するプラスチック薄片の脱水が容易になり、これらプラスチックのリサイクル工程での処理課題を解決することができる。
【図面の簡単な説明】
【図１】本発明に係る竪形連続固液分離装置の概略を例示する説明図
【符号の説明】
１：ケーシング ２：スクリーン筒
３：回転ローター ４：回転羽根
５：スクリーン筒内下部に連通する供給口
６：スクリーン筒内上部に連通する分離固体の取出口
７：ケーシングとスクリーン筒との間の断面がリング状の空間
８：断面リング状空間部７下部に連通する分離液体の排出口
９：スクリーン筒内下部に連通する下部吸気口
１０：断面リング状空間部中程に連通する排気口
１１：スクリーン筒内上部に連通する上部吸気口
１２：サイクロン １３：サイクロン排気口
１４：吸気ファン １５：流量調整機構（ダンパー）
１６：サイクロン供給口[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a vertical continuous solid-liquid separation device and a method for solid-liquid separation of recovered plastic in a recycling process of recovered plastic. The vertical continuous solid-liquid separation device according to the present invention, especially in the recycling process of the separated and recovered plastic having a high content of film-shaped plastic, mixed with water or washing water, or water or washing water adhered It is suitable for separating water or washing water from plastic containing flakes of fractionated collected plastic.
[0002]
[Prior art]
2. Description of the Related Art Vertical continuous solid-liquid separators are widely used in many fields because they have a simple structure, are easy to use, have few failures, and have high efficiency. First, a conventional vertical continuous solid-liquid separator will be briefly described with reference to FIG. FIG. 1 illustrates an outline of a solid-liquid separation device including an internal structure.
[0003]
A screen cylinder 2 for separating solid and liquid is fixed to the casing 1 at a required interval inside the vertical casing 1. Then, a rotor 3 having a rotating blade 4 attached to the surface thereof is mounted inside the screen cylinder 2, and the rotor 3 is rotated at a high speed during operation. A mixture containing a solid-liquid to be separated is supplied to the inside of the screen cylinder 2 from a supply port 5 at a lower portion of the screen cylinder 2. The solid-liquid is pressed against the inner surface of the screen cylinder 2 by the centrifugal force of the rotor 3 rotating at a high speed, the liquid passes outside the screen 2, and the solid is left inside to separate the solid and the liquid. The solid remaining on the inside is sent upward through the gap between the rotor 3 and the inside of the screen cylinder 2 while being scraped up by the rotating blades 4, and is taken out from the solid outlet 6 communicating with the upper part of the screen cylinder 2. . On the other hand, the liquid that has passed through the screen cylinder 2 descends through the space 7 between the screen cylinder 2 and the casing 1 and is discharged from the liquid discharge port 8 communicating with the lower part of the casing 1. Conventionally, many solid-liquid separators of this type have been used for the purpose of separating water adhering to pellets in a synthetic fiber raw material or molded plastic raw material pellet manufacturing process.
[0004]
By the way, recently, the recycling use of plastic has gradually entered the practical stage. In particular, various types of used plastics, including PET bottles used for containers and packaging, have been separated and collected from ordinary households, and recycled. In the above-mentioned used plastics, metals, glass, inorganic substances such as earth and sand, paper, oils and fats, and organic substances such as dissimilar plastics which are obstacles for recycling are mixed or adhered as foreign substances. It is necessary to separate the required plastic from these foreign substances.
[0005]
[Problems to be solved by the invention]
Recovered plastics, which are mostly used plastic bags and bottles, are first sieved, magnetically separated or manually separated to remove contaminants such as sediment, iron, and glass bottles, and then the remaining contaminants are separated. For this purpose, the particles are crushed to an appropriate size, sequentially washed until the adhered and mixed dirt and foreign substances are reduced to a required level or less, and separated from the foreign substances. In this process, the collected plastic needs to be dehydrated or drained several times. Therefore, the above-mentioned vertical continuous solid-liquid separator, which has a proven track record in dewatering plastic pellets, has been widely adopted for washing crushed recovered plastics and separating mixed water, since it is simple and has few failures. Was.
[0006]
However, when it was actually used, it was found that the dewatering capacity of the solid-liquid separator did not reach the initially assumed level, but rather became a bottleneck in the process. Part of the plastic flakes to which water or the like has adhered temporarily sticks to the inner surface of the screen cylinder and closes the screen, hinders the passage of liquid, and is difficult to be lifted up by the rotating blades, so that the solid flakes that can be originally exhibited It reduces the liquid separation capacity. Alternative means such as centrifugal dehydration and through-flow drying were examined or tested, but no suitable means was found to be better. Therefore, the present invention was completed as a result of examining whether or not there is a means capable of separating a liquid from a plastic flake mixed with a liquid such as water using a vertical continuous solid-liquid separator without deteriorating the solid-liquid separation ability. It is a thing.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a vertical cylindrical casing 1, a screen cylinder 2 fixed in the casing, and a rotating blade 4 mounted on a surface mounted in the screen cylinder 2. A rotating rotor 3, a supply port 5 for a solid-liquid separated object provided in communication with a lower part in the screen cylinder 2, and a separation solid outlet 6 provided in communication with an upper part in the screen cylinder 2. And a discharge port 8 for a separated liquid having a cross-section formed between the casing 1 and the screen cylinder 2 and having a cross section communicating with a lower portion of the ring-shaped space 7. 2. A vertical continuous solid-liquid having a lower intake port 9 communicating with the inner and lower portions for introducing gas from the outside, and an exhaust port 10 communicating in the middle of the ring-shaped space 7. Provide a separation device.
[0008]
The above vertical continuous solid-liquid separator comprises a cyclone 12 having a supply port 16 connected to an outlet 6 for separated solids, and an intake fan 14 having an exhaust port 10 and an exhaust port 13 of the cyclone connected to the intake side. It is convenient to configure it including Depending on the operation conditions, an upper intake port 11 for introducing gas from the outside may be provided in communication with the upper portion of the screen cylinder 2. Preferably, a flow control mechanism 15 is provided in each of two pipe systems connecting the intake side of the intake fan 14, the exhaust port 10 and the exhaust port 13 of the cyclone.
[0009]
INDUSTRIAL APPLICABILITY The vertical continuous solid-liquid separation device of the present invention is extremely suitable for separating recovered plastic from recovered plastic mixed with water or washing water, which has been a problem in the past, in the recycled plastic recycling process. In the recycling process of the collected plastic, the amount of intake air from the exhaust port 10 may be adjusted to be 0.6 to 2 times the amount of intake air from the cyclone exhaust port 13.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings. FIG. 1 is an explanatory view illustrating a vertical continuous solid-liquid separator (hereinafter, abbreviated as a solid-liquid separator) according to the present invention.
[0011]
The present invention, as a result of repeating trial and error using the solid-liquid separation device to solve the above-described problems, as a result, conditions such as the type and size of the mixed plastic flakes, the type and aperture of the screen, and the rotor Although the setting conditions such as the number of rotations are not the same due to the tangling, the flow of a large amount of gas (usually air) through the screen cylinder substantially eliminates or reduces the sticking of the plastic flakes, It was found that the processing efficiency of separating plastic from liquid such as washing water containing dirt and dirt was increased. Although the reason is not definite, for example, water adhering to the plastic flakes in the screen cylinder is peeled off or evaporated by the sucked or blown air, and becomes less than a certain amount, and the plastic flakes stick to the inner surface of the screen. It is considered that the sticking disappeared, and the blade was easily scraped off and lifted up by the rotating blades, moved up in the screen cylinder, and easily moved to the solid outlet.
[0012]
The structure and operation of the solid-liquid separation device according to the present invention will be described in detail. In the solid-liquid separation device of the present invention, in order to allow a large amount of gas (usually air) to flow through the vertical screen cylinder 2, a lower intake port 9 communicating with the lower part of the screen cylinder 2 is provided at the bottom or lower part of the casing 1. Is newly provided in the middle of the casing 1 from the ring-shaped space 7 between the casing 1 and the screen tube 2 to the outside of the machine.
[0013]
Then, for example, a recovered plastic containing a film-shaped plastic flake in which a liquid such as water or washing water, sometimes a gas is mixed, is continuously supplied from the supply port 5 into the screen cylinder 2. At that time, gas may be entrained, but there is no particular problem. A large amount of air, for example, air is sucked or fed into the screen tube 2 from the lower intake port 9.
[0014]
The supplied collected plastic and the like are pressed by the centrifugal force against the inner surface of the screen tube 2 while being stirred by the rotor 3 rotating at a high speed and separating dirt by washing water and the like. And the solid recovered plastic is left inside. The remaining solid is sent upward through the gap between the rotor 3 and the inside of the screen cylinder 2 while being lifted up by the rotating blades 4, and is taken out from the solid outlet 6 communicating with the upper part of the screen cylinder 2.
[0015]
The air supplied from the intake port 9 prevents the flake plastic or the like from adhering to the screen tube 2, and a part of the air is removed from the exhaust port 10, and the rest is collected with the flake plastic separated from the liquid. It is discharged out of the system from the outlet 6. Usually, the supply port 16 of the cyclone 12 for solid-gas separation is connected to the solid outlet 6, and the collected plastic including the flakes taken out of the solid outlet 6 is introduced together with the air to separate the collected plastic from the air. .
[0016]
Since the amount of air supplied into the screen cylinder 2 varies depending on the device and operating conditions, it is preferable to appropriately adjust and set the optimum conditions. As an example, in the solid-liquid separator of standard processing amount 100kg / hr, 5~10m 3 / hr approximately, 20 to 30 m 3 / hr about the solid-liquid separator of standard processing amount 1000 kg / hr (none A head loss of about 300 mmAq) is appropriate. When there is a large amount of adhesion to the vicinity of the discharge port 6, it is preferable to separately provide an upper intake port 11 communicating with the upper part in the screen tube 2 and to ventilate an appropriate amount. In addition, a filter is preferably attached to the inlets 9 and 11 of the solid-liquid separator so that foreign matter from the outside does not enter.
[0017]
In order to sufficiently exhibit the performance of the solid-liquid separator of the present invention, a solid-gas separation cyclone 12 communicating with the solid-solid separation port 6 is usually attached to the separation solid take-out port 6, and the exhaust port 6 and the exhaust port 13 of the cyclone are provided. A connected intake fan 14 is provided to operate the solid-liquid separator on the intake side. Then, preferably, the ratio of the amount of air discharged from the solid-liquid separator exhaust port 10 and the cyclone exhaust port 13 is adjusted. It is preferable to attach a flow rate adjusting mechanism, for example, a damper 15 to each piping system. Of course, adjustment may be made by attaching a suction blower having a low static pressure and a large air flow, such as a plate fan or a sirocco fan, to each piping system. In the present invention, devices and members other than those described above can be used in combination as long as the effects of the present invention are not impaired as necessary.
[0018]
INDUSTRIAL APPLICABILITY The solid-liquid separator according to the present invention can be extremely suitably used in a recycling process of a separately collected plastic in which crushed plastic flakes are repeatedly washed and dehydrated. When used in the recycle step, the ratio of the amount of intake from the liquid separator exhaust port 10 to the amount of intake from the solid cyclone exhaust port 13 is generally within a range of 0.6 to 2 times, although it depends on the amount of water mixed in. Adjust it.
[0019]
【The invention's effect】
The use of the present invention facilitates the dehydration of plastic flakes mixed with water, such as crushed plastic in the separation and recovery process of plastic bottles and various used plastics, and cutting waste at plastic processing sites. Can be solved.
[Brief description of the drawings]
FIG. 1 is an explanatory view schematically illustrating a vertical continuous solid-liquid separation device according to the present invention.
1: Casing 2: Screen cylinder 3: Rotating rotor 4: Rotating blade 5: Supply port 6 communicating with the lower part inside the screen cylinder 6: Separated solids outlet communicating with the upper part inside the screen cylinder 7: Between the casing and the screen cylinder Ring-shaped space 8: Separated liquid discharge port 9 communicating with the lower part of ring-shaped cross section 7: Lower intake port 10 communicating with the lower part inside the screen cylinder 10: Exhaust port 11 communicating with the middle of the ring-shaped cross section : Upper intake port communicating with the upper part inside the screen cylinder 12: Cyclone 13: Cyclone exhaust port 14: Intake fan 15: Flow rate adjusting mechanism (damper)
16: Cyclone supply port

Claims (6)

竪形筒状のケーシング（１）と、前記ケーシング内に固定されたスクリーン筒（２）と、前記スクリーン筒内に装着された表面に回転羽根（４）の取付けられている回転ローター（３）と、前記スクリーン筒内の下部に連通して設けた固液を含む被分離物の供給口（５）と、前記スクリーン筒内上部に連通して設けられた分離固体の取出口（６）と、前記ケーシングとスクリーン筒との間に形成さた断面がリング状の空間（７）下部に連通する分離液体の排出口（８）とを含んで構成された竪形連続固液分離装置において、前記スクリーン筒内下部に連通して外部から気体を導入するための下部吸気口（９）、および前記リング状空間部の中程に連通する排気口（１０）が設けられていることを特徴とする竪型連続固液分離装置。A vertical cylindrical casing (1), a screen cylinder (2) fixed in the casing, and a rotary rotor (3) having a rotating blade (4) mounted on a surface mounted in the screen cylinder; A supply port (5) for a solid-liquid separated object provided in communication with a lower portion in the screen cylinder, and a separation solid outlet (6) provided in communication with an upper portion in the screen cylinder. A vertical continuous solid-liquid separation device comprising a separation liquid discharge port (8) having a cross section formed between the casing and the screen cylinder and communicating with a lower part of a ring-shaped space (7). A lower intake port (9) communicating with a lower portion inside the screen cylinder for introducing a gas from the outside and an exhaust port (10) communicating in the middle of the ring-shaped space portion are provided. Vertical solid-liquid separator. 供給口（１６）を分離固体の取出口（６）に連通して取り付けたサイクロン（１２）と、吸気側に排気口（１０）及び前記サイクロンの排気口（１３）を接続させた吸気ファン（１４）とを含んでなることを特徴とする請求項１記載の竪形連続固液分離装置。A cyclone (12) having a supply port (16) connected to an outlet (6) for separating solids, and an intake fan (10) connected to an exhaust port (10) and an exhaust port (13) of the cyclone on an intake side. 14. The vertical continuous solid-liquid separation device according to claim 1, comprising: さらに、スクリーン筒上部に連通して外部から気体を導入するための上部吸気口（１１）が設けられていることを特徴とする請求項１又は２記載の竪型連続固液分離装置。The vertical continuous solid-liquid separation device according to claim 1 or 2, further comprising an upper intake port (11) communicating with an upper portion of the screen cylinder for introducing a gas from outside. 吸気ファン（１４）の吸気側と、排気口（１０）及び前記サイクロンの排気口（１３）とを接続する２本の配管系に、それぞれ流量調整機構（１５）が設けられているを特徴とする請求項２又は３に記載の竪連続固液分離装置。A flow control mechanism (15) is provided in each of two pipe systems connecting the intake side of the intake fan (14), the exhaust port (10), and the exhaust port (13) of the cyclone. The vertical continuous solid-liquid separation device according to claim 2 or 3, wherein 回収プラスチックのリサイクル工程において、水又は洗浄水が混在する回収プラスチックから回収プラスチックを分離するために、請求項１〜４のいずれかに記載の竪形連続固液分離装置を用いることを特徴とする回収プラスチックの固液分離方法。In the recycling process of the collected plastic, the vertical continuous solid-liquid separation device according to any one of claims 1 to 4 is used for separating the collected plastic from the collected plastic in which water or washing water is mixed. Solid-liquid separation method for recovered plastic. 回収プラスチックのリサイクル工程において、水又は洗浄水が混在する回収プラスチックから水又は洗浄水を分離するために、請求項２、３又は４に記載の竪形連続固液分離装置を用い、かつ、サイクロン排気口（１３）からの吸気量に対して、排気口（１０）からの吸気量を０．６〜２倍の範囲内において調整することを特徴とする回収プラスチックの固液分離方法。In the recycling process of the recovered plastic, the vertical continuous solid-liquid separation device according to claim 2, 3 or 4 is used for separating water or cleaning water from the recovered plastic mixed with water or cleaning water, and using a cyclone. A solid-liquid separation method for recovered plastics, wherein the amount of intake air from the exhaust port (10) is adjusted within a range of 0.6 to 2 times the amount of intake air from the exhaust port (13).
JP2002347087A 2002-11-29 2002-11-29 Vertical continuous solid-liquid separator and recovered plastic separation process Pending JP2004174467A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2910355A1 (en) * 2014-02-21 2015-08-26 STF Maschinen- & Anlagenbau GmbH Device for washing bulk material
CN108285476A (en) * 2018-04-17 2018-07-17 河南工业大学 A kind of eddy flow extrusion separator
CN109808215A (en) * 2019-03-06 2019-05-28 无锡唐古环保设备有限公司 A kind of kitchen, fruits and vegetables rubbish vertical solid-liquid separator
CN116334387A (en) * 2023-03-30 2023-06-27 湖北大江环保科技股份有限公司 Processing equipment for reducing unit consumption of secondary zinc oxide

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2910355A1 (en) * 2014-02-21 2015-08-26 STF Maschinen- & Anlagenbau GmbH Device for washing bulk material
CN108285476A (en) * 2018-04-17 2018-07-17 河南工业大学 A kind of eddy flow extrusion separator
CN109808215A (en) * 2019-03-06 2019-05-28 无锡唐古环保设备有限公司 A kind of kitchen, fruits and vegetables rubbish vertical solid-liquid separator
CN109808215B (en) * 2019-03-06 2024-02-20 无锡唐古环保设备有限公司 Vertical solid-liquid separator for kitchen and fruit and vegetable garbage
CN116334387A (en) * 2023-03-30 2023-06-27 湖北大江环保科技股份有限公司 Processing equipment for reducing unit consumption of secondary zinc oxide
CN116334387B (en) * 2023-03-30 2024-01-09 湖北大江环保科技股份有限公司 Processing equipment for reducing unit consumption of secondary zinc oxide

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