JP2762362B2 - Separation treatment method for papermaking - Google Patents
Separation treatment method for papermakingInfo
- Publication number
- JP2762362B2 JP2762362B2 JP1052884A JP5288489A JP2762362B2 JP 2762362 B2 JP2762362 B2 JP 2762362B2 JP 1052884 A JP1052884 A JP 1052884A JP 5288489 A JP5288489 A JP 5288489A JP 2762362 B2 JP2762362 B2 JP 2762362B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- foreign matter
- control valve
- screen
- 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.)
- Expired - Fee Related
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、新生パルプ生産処理，損紙処理又は新聞，
雑誌等の故紙処理において、末離解片，異物（金属片，
石，プラスチック片，スチロール片，ビニール片）を含
む製紙用原料から、末離解片を離解し、異物を系外に廃
棄するリジェクト処理用の製紙用スクリーンの製紙用分
離処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a new pulp production treatment, a broke treatment or a newspaper,
In waste paper processing of magazines, etc.
The present invention relates to a papermaking separation method for a papermaking screen for rejection processing in which defibrated pieces are disintegrated from papermaking raw materials including stones, plastic pieces, styrene pieces, and vinyl pieces) and foreign substances are discarded outside the system.
一般に、新生パルプ生産処理・損紙処理・古紙処理な
ど製紙用設備においては原料となる繊維懸濁液中の末離
解片を離解し、かつ石、砂、金属片、樹脂片などの異
物、その他のごみ排除のために多数の丸孔又はスリット
のあるスクリーンプレートで密閉ケーシング内を仕切っ
て区画構成したスクリーン装置が用いられ、このスクリ
ーン装置に組合せてスクリーンテールを離解するため高
速にて回転するインペラを配備した高速離解機が知られ
ている。Generally, papermaking equipment such as new pulp production processing, waste paper processing, waste paper processing, disintegrates the defibrated fragments in the fiber suspension that is the raw material, and removes foreign matter such as stone, sand, metal fragments, resin fragments, etc. In order to eliminate dust, a screen device is used which is formed by partitioning the inside of a closed casing with a screen plate having a large number of round holes or slits, and an impeller which rotates at high speed to disintegrate the screen tail in combination with this screen device. There is known a high-speed disintegrator equipped with.
このスクリーン装置を用いてリジェクト処理する場
合、従来では第５図（Ａ）（Ｂ）に示すようにメインラ
インＡに丸孔スクリーン装置S1とスリットスクリーン装
置S2とを直列に配備し、丸孔スクリーンテールとスリッ
トスクリーンテールとをそれぞれ各別の離解機B,B1で離
解したのち、それぞれをチェストC,C1及びポンプD,D1を
介して丸孔テールスクリーン装置S3とスリットテールス
クリーン装置S4とで処理する（第５図（Ａ））か、或い
は丸孔スクリーン装置S1とスリットスクリーン装置S2と
の両スクリーンテールを一緒に合流してチェストＣ及び
ポンプＤで離解機Ｂに送り離解したのちに、チェストC1
及びポンプD1を経て丸孔テールスクリーン装置S3で粗選
したのちスリットテールスクリーン装置S4で処理するこ
と（第５図（Ｂ））が行われている。If you reject process by using the screen device, conventionally deployed and round hole screen device S 1 and slit screen device S 2 in series to the main line A as shown in FIG. 5 (A) (B), round hole screen tail and slit screen tail and each separate disintegrator respectively B, After macerating at B 1, chest respectively C, C 1 and pump D, a circular hole tail through D 1 screen apparatus S 3 and the slit tail is treated with a screen device S 4 (FIG. 5 (a)) or, alternatively round hole screen device S 1 and joins together both screen tail the slit screen unit S 2 disintegrator at chest C and pump D After sending to B and disaggregating, chest C 1
And treatment with a slit tail screen device S 4 After roughing a round hole tail screen apparatus S 3 via pump D 1 (FIG. 5 (B)) is performed.
ところが、この従来処理システムでは、各スクリーン
テール中の異物が高速離解機で微細化されやすいし、処
理システムが複雑化して割高となるほか、丸孔テールス
クリーン装置，スリットテールスクリーン装置のハイド
ロフォイル、即ちアジテータに異物がかかり操業トラブ
ルの原因となると共に、再びスクリーン装置に戻った多
くの異物がスクリーンの目詰まりの原因となって望まし
くないし、分離機能も低下するのでポンプ容量を大きく
しなければならず、テールスクリーン装置だけの単独処
理の場合は、末離解片が粕として排出され歩留りが悪く
なって問題があった。However, in this conventional processing system, foreign matter in each screen tail is easily miniaturized by a high-speed disintegrator, and the processing system becomes complicated and expensive. In addition, a round hole tail screen device, a hydrofoil of a slit tail screen device, That is, foreign matter is applied to the agitator, causing operation troubles, and many foreign matter returning to the screen device is also undesirable because it causes clogging of the screen, and the separation function is reduced, so the pump capacity must be increased. On the other hand, in the case of the single treatment using only the tail screen device, there is a problem that the disintegrated fragments are discharged as cake and the yield is deteriorated.
本発明は、これら従来の諸欠点を適確に排除しようと
するもので、有用繊維と異物とを分離する精選処理能力
の増大が可能であり、しかも末離解片の排出が少なく、
高速離解機程異物は砕かれないので製品品質が向上する
と共に、原料中の末離解片の量及び性質によって離解機
能の操作及び運転時間を調節でき、異物破砕程度も調節
できスクリーンテールの処理システムも簡素化でき、有
用繊維の回収を大幅に高められる運転方法を安価な形態
で提供することを目的としたものである。The present invention is intended to properly eliminate these conventional disadvantages, it is possible to increase the processing capacity for selective separation of useful fibers and foreign matter, and furthermore, the discharge of disintegrated fragments is small,
Foreign materials are not crushed as high-speed disintegrators improve the product quality, and the operation and operation time of the disintegration function can be adjusted according to the amount and properties of the defibrated pieces in the raw material, and the degree of foreign matter crushing can also be adjusted. It is an object of the present invention to provide an operation method capable of greatly improving the recovery of useful fibers in an inexpensive form.
本発明は、丸孔スクリーン装置およびスリットスクリ
ーン装置よりのスクリーンテールをスクリーンのある密
閉ケーシングにおいて離解処理する際に、水張り工程及
び原料通し運転工程中に残留未離解片の離解工程を含
み、前記密閉ケーシングへの原料及び洗浄水の供給と粗
大異物，微細異物並びに精選有用繊維の排出との各操作
を各流路に配備される制御弁の開閉によって行うもので
あって、前記原料通し運転工程中にタイマ又は負荷又は
原料の入口，出口の圧力差のいずれか先に作動した検出
を優先して、残留未離解片の離解工程に移し、有用繊維
回収・洗浄工程と粗大異物排出工程及び微細異物排出工
程とを順次行い、各工程をタイマによって所定時分継続
して運転するようにした製紙用分離処理方法において、
前記原料通し運転工程は、原料供給と精選原料排出と、
未離解繊維分を含む排液全量の原料供給路への循環とを
行う制御弁を開とし、他の給排操作は制御弁を閉じて休
止させながら運転を継続するようにし、前記残留未離解
片の離解工程は、微細異物を含む排液の一部を原料供給
路に循環しつつ、精選原料の一部を排出するように制御
弁の絞り開度を調整し、他の給排操作は制御弁を閉じて
休止させながら運転を継続するようにしたことを特徴と
している。The present invention includes a step of disintegrating the remaining undisintegrated pieces during a water filling step and a raw material passing operation step, when disintegrating a screen tail from a round hole screen device and a slit screen device in a closed casing having a screen, Each operation of supplying the raw material and washing water to the casing and discharging the coarse foreign matter, fine foreign matter, and useful fibers for selection is performed by opening and closing a control valve provided in each flow path. Priority is given to the detection of whether the timer or the load or the pressure difference between the inlet and outlet of the raw material has come first, and the process is shifted to the defibration process of the remaining undisintegrated pieces, the useful fiber collection and washing process, the coarse foreign material discharge process, and the fine foreign material And a discharging process are sequentially performed, and each process is continuously operated for a predetermined time by a timer.
The raw material passing operation process, raw material supply and selected raw material discharge,
Opening a control valve that circulates the entire amount of effluent including the undisintegrated fiber to the raw material supply path, and continuing the operation while closing and suspending the control valve for other supply and discharge operations, the residual undisintegration In the piece disintegration process, while circulating a part of the waste liquid containing fine foreign matter to the raw material supply path, adjusting the throttle opening of the control valve so as to discharge a part of the selected raw material, other supply and discharge operations are performed. The operation is continued while the control valve is closed and stopped.
本発明の作用を第１図を参照して説明すると，分離装
置の密閉ケーシング２内に給液された原料は、スクリー
ン１の近接して回転するインペラ５と、これに対向した
離解用攪拌翼８とで前処理室３内において攪乱されスク
リーン１から有用繊維を通過して流し、異物はスクリー
ン１を通過せずに分離されて導出路７から前処理室３外
へ排除されて処理される。スクリーン１の前処理室３側
にはスクリーン面を拭う様に接近させて回転するインペ
ラ５と、このインペラ５の反対側の中心に高速で回転す
る攪拌翼８を設けたものでは、前処理室３へ送り込まれ
た原料はその回転方向の旋回，渦流を与えられ、これに
伴って生ずる遠心力により原料中の粗大異物は前処理室
３の外周壁に飛ばされ、その周壁を旋回しながら導出路
14の制御弁V4の間歇的な開閉により排除され、一方のス
クリーン１を通過した末離解片維分は有用繊維ととも
に、後処理室４の旋回流でスクリーンバケット９で分離
され、排出口10より排出流路16の制御弁V6の開閉で導出
されると共に、必要に応じ一部は循環流路15の制御弁V5
の開閉で原料流路11に戻して再処理される。さらにスク
リーンバケット９を通過した有用繊維は精選原料出口12
1より流路12の制御弁V2の開閉制御で系外に取り出され
次工程にて処理されるものであるが、前記密閉ケーシン
グ２への原料通し運転工程中にタイマ又は負荷又は原料
の入口，出口の圧力差のいずれか先に作動した検出を優
先して、残留末離解片の離解工程に移し、有用繊維回収
・洗浄工程と粗大異物排出工程及び微細異物排出工程と
を順次行い各工程をタイマによって所定時分継続して運
転し離解作用を良好にし、異物の分離機能を高めるほ
か、原料供給用のポンプ容量も小さなもので済みランニ
ングコストも著しく軽減できる装置とすることができ
る。The operation of the present invention will be described with reference to FIG. 1. The raw material supplied into the closed casing 2 of the separating device is composed of an impeller 5 rotating close to the screen 1 and a disintegrating stirring blade facing the impeller 5. In step 8, the fibers are disturbed in the pretreatment chamber 3 and flow through the useful fibers from the screen 1, and the foreign matter is separated without passing through the screen 1, and is removed from the lead-out path 7 to the outside of the pretreatment chamber 3 for processing. . On the pre-processing chamber 3 side of the screen 1, an impeller 5 that rotates while approaching the screen surface to wipe it, and a stirring blade 8 that rotates at a high speed at the center opposite to the impeller 5 are provided. The raw material fed into 3 is given a swirl and a vortex in the direction of rotation, and the resulting centrifugal force causes coarse foreign substances in the raw material to fly to the outer peripheral wall of the pretreatment chamber 3 and to be drawn out while rotating the peripheral wall. Road
Eliminated by intermittent opening and closing of the 14 control valve V 4 of SueHanare Kaihen維分passing through one of the screen 1 with useful fibers are separated by a screen bucket 9 in the swirling flow of the post-processing chamber 4, outlet 10 together they are derived in a more opening and closing of the control valve V 6 of the discharge flow channel 16, a portion necessary control valve V 5 in the circulation flow path 15
Is returned to the raw material flow path 11 for reprocessing. Further, the useful fibers that have passed through the screen bucket 9 are passed through the selected material outlet 12
Although 1 than in off control of the control valve V 2 of the channel 12 is intended to be processed by the retrieved next step out of the system, the raw material through the inlet of the timer or load or starting material during the operation process to the closed casing 2 Priority is given to the detection of the pressure difference at the outlet, whichever comes first, and the process is shifted to the disintegration process of the residual disintegrated fragments, and the useful fiber collection and washing process, the coarse foreign material discharging process and the fine foreign material discharging process are sequentially performed. Can be operated continuously for a predetermined time by a timer to improve the disintegration function, enhance the function of separating foreign substances, and also reduce the pump capacity for supplying the raw material, thereby significantly reducing the running cost.
本発明の実施例を第１〜４図例で説明すると、製紙原
料のメインラインＡにある丸孔スクリーン装置S1及びス
リットスクリーン装置S2よりのスクリーンテールをチェ
ストＣ及びポンプＤを経てスクリーン１のある密閉ケー
シング２に導入する。即ち、制御弁V1のある原料流路11
に連通する製紙用原料入口６から導入される原料を有用
繊維分と不純物の異物分とに分離するためのスクリーン
１を密閉ケーシング２中に室内を前処理室３と後処理室
４とに仕切った区画状態で配備し、このスクリーン１に
近接して回転インペラ５を前処理室３内に設けた分離機
構と、該分離機構で分離した粗大異物の排出口７に連結
した導出流路14とを配備した装置において、前記前処理
室３中に生ずる旋回流，渦流を攪乱させる離解用攪拌翼
８を前記回転インペラ５に対向して前処理室３内に配備
し、回転インペラで旋回流・渦巻を攪拌すると共に、後
処理室４に制御弁V2，V6のある流路12,16にそれぞれ連
通された精選原料出口121と微細異物排出口10とを形成
し、かつ前記前処理室３に制御弁V3のある洗浄水供給流
路13を連通配備して製紙用分離装置としてある。To illustrate embodiments of the present invention in the first to fourth illustrated example, the screen 1 of the screen tail than round hole screen device S 1 and slit screen device S 2 on the main line A of the papermaking material through the chest C and pump D Into the closed casing 2 having a gap. That is, the raw material flow path 11 with a control valve V 1
The screen 1 for separating the raw material introduced from the papermaking raw material inlet 6 into useful fibers and foreign matter of impurities is divided into a pre-processing chamber 3 and a post-processing chamber 4 in a closed casing 2. A separation mechanism in which a rotary impeller 5 is provided in the pre-processing chamber 3 in the vicinity of the screen 1 and an outlet channel 14 connected to a discharge port 7 for the large foreign matter separated by the separation mechanism. In the apparatus provided with the above, a disintegrating agitating blade 8 for disturbing the swirl flow and the vortex generated in the pretreatment chamber 3 is disposed in the pretreatment chamber 3 so as to face the rotary impeller 5, and the swirl flow with stirring the spiral, to form a selective material outlet 12 1 and the fine foreign matter discharge port 10 which communicates respectively with the flow paths 12, 16 with a control valve V 2, V 6 to the post-processing chamber 4, and the pretreatment paper cleaning water supply channel 13 with a control valve V 3 to the chamber 3 deployed communication There is a separation device.
この場合、前記離解用攪拌翼８としては、前記回転イ
ンペラ５より小径例えば1/3の寸法で高速度例えば1000
〜3000r.p.m.の速度で逆回転又は同回転若しくは間歇的
に逆回転される駆動機構、例えばモータ18を備えて、全
工程連続又は末離解片離解工程のみなどに選択運転すれ
ばよく、前記後処理室４には円筒形のスクリーンバケッ
ト９を設けて精選原料回収室19と微細異物回収室20とに
区画し、該円筒形スクリーンバケット９に沿って移動す
るアジテータホイル21を備えてある。In this case, the agitating blade 8 for disaggregation has a smaller diameter, for example, 1/3 of the diameter of the rotary impeller 5, and a higher speed, for example, 1000 m.
A driving mechanism that is reversely rotated at the speed of ~ 3000 rpm or the same rotation or intermittently reversely rotated, for example, provided with a motor 18, may be selectively operated only for the entire process continuous or only for the final disintegration fragment disintegration process, and the like. The processing chamber 4 is provided with a cylindrical screen bucket 9, which is divided into a selected raw material collecting chamber 19 and a fine foreign matter collecting chamber 20, and is provided with an agitator wheel 21 which moves along the cylindrical screen bucket 9.
なお、前記密閉ケーシング２内に装備されるスクリー
ン１が、丸孔ストレーナを用い、スクリーンバスケット
９はスリットスクリーンとして組合せた構成とするダブ
ルセパレータ型式とするのがよい。The screen 1 provided in the closed casing 2 is preferably of a double separator type in which a round hole strainer is used and the screen basket 9 is combined as a slit screen.
さらに製紙用原料としては、密閉ケーシング２に接線
方向から供給されて旋回流を生ずるようにし、この原料
及び洗浄水の供給と粗大異物，微細異物並びに精選原料
の排出との各操作を各流路11,12,13,14,15,16に配備さ
れる制御弁V1〜V6の開閉によって行うもので、前記密閉
ケーシング２にはエア抜き弁V7のある排気流路17を備え
ると共に、流路11,12に手動弁V8，V9を付設してあり、
各制御弁V1〜V7は第１表のように開閉操作を繰り返し、
分離処理が行われる。Further, the papermaking raw material is supplied to the closed casing 2 from the tangential direction to generate a swirling flow, and the operations of supplying the raw material and the washing water and discharging the coarse foreign matter, the fine foreign matter, and the selected raw material are performed in each flow path. This is performed by opening and closing control valves V 1 to V 6 provided in 11, 12, 13, 14, 15, and 16 , and the closed casing 2 is provided with an exhaust passage 17 having an air release valve V 7 , Manual valves V 8 and V 9 are attached to the flow paths 11 and 12,
The control valves V 1 ~V 7 repeats the opening and closing operation as in the first table,
Separation processing is performed.
即ち、スクリーン水張り後に原料通し運転工程に入
り、継続して有用繊維を流路12から導出するが、タイマ
又は負荷又は原料の入口，出口の圧力差のいずれか先に
作動した検出を優先して、残留末離解片の離解工程のの
ち、有用繊維の精選原料回収・洗浄工程と粗大異物排出
工程及び末離解片維分を含む微細異物排出工程とを順次
行い、各工程をタイマによって所定時分継続して運転す
る。 That is, the raw material passing operation process is started after the screen is filled with water, and the useful fiber is continuously drawn out from the flow channel 12. However, the timer or the load or the pressure difference between the inlet and the outlet of the raw material, whichever comes first, is detected with priority. After the disintegration process of the residual powder, the process of collecting and washing the selected raw materials for the useful fiber, the process of discharging the coarse foreign particles, and the process of discharging the fine foreign particles including the finely separated fragments are sequentially performed. Continue driving.
例えば、原料中の異物はスクリーン１を通過出来ず次
第にケーシング２内に濃縮され、出口への良質原料通過
が妨げられてくる。タイマ又はモータの負荷、若しくは
出入口の差圧が予め設定された状態となると入口弁の制
御弁V1が閉じられ、洗浄水がケーシング２内に導入さ
れ、ケーシング２内に残留する良質繊維を出口側に回収
する。良質繊維が回収された後、ケーシング内は水と異
物のみとなりリジェクトバルブの弁V6を全開することに
より系外へ異物を排棄する。これら全ての動作は自動的
にコントロールされ、無人運転される。For example, foreign substances in the raw material cannot be passed through the screen 1 and are gradually concentrated in the casing 2, so that the passage of the high quality raw material to the outlet is hindered. Load the timer or a motor, or the differential pressure of the doorway is being preset control valve V 1 of the inlet valve is closed, the washing water is introduced into the casing 2, the outlet quality fibers remaining in the casing 2 Collect on the side. After being collected good quality fiber, the casing is Hai棄foreign matter out of the system by fully opening the valve V 6 of the reject valve becomes only water and foreign objects. All these actions are automatically controlled and unmanned.
なお、前記残留末離解片の離解工程においては、末離
解片維分を含む排液の一部を原料供給流路11を経て、又
は前処理室３に直接循環しつつ、精選原料の一部を排出
する制御弁V2，V5の絞り開度とし、他の給排操作は制御
弁V1，V3，V4，V6，V7を閉じて休止させて運転継続した
り、前記原料通し運転工程において、原料供給と精選原
料排出と微異物を含む排液全量の原料供給路への循環と
を行う制御弁V1，V2，V5を開とし、他の給排操作は制御
弁V3，V4，V6，V7を閉じて休止させて連続運転すればよ
い。In the step of disaggregating the residual disintegrated fragments, a part of the waste liquid containing the residual disintegrated fragments is passed through the raw material supply flow path 11 or directly circulated to the pretreatment chamber 3 while a part of the selected raw material is disintegrated. a throttle opening degree of the control valve V 2, V 5 for discharging the other supply and discharge operation or continuous operation by rest closes the control valve V 1, V 3, V 4 , V 6, V 7, wherein In the raw material passing operation process, the control valves V 1 , V 2 , and V 5 for supplying the raw material, discharging the selected raw material, and circulating the entire amount of the waste liquid including the fine foreign substance to the raw material supply path are opened. The control valves V 3 , V 4 , V 6 , and V 7 may be closed and stopped for continuous operation.
また、前記アジテータフォイル21は、回転インペラ５
と共に回転軸22及びプリー23を介してモータ24で前記モ
ータ18の回転に対してコントロールされつつ例えば300
〜800r.p.m.で駆動されるように構成してあるが、単一
モータで変速又は増速機構乃至クラッチ機構を介して連
動する形態としてもよく、さらに各制御弁V1〜V7及び各
検出器，タイマはデータ処理部のコンピュータユニット
（図示せず）に連絡され、制御回路を構成してあって、
原料処理量，原料種類，原料濃度，出入口圧力差，負荷
など離解条件のデータをアナログ信号として入力してデ
ジタル信号に変換するA/Dコンバータ及びD/Aコンバータ
を含む前記コンピュータユニットで内部固定データと入
力データとを比較処理して前記回転インペラ５及び攪拌
翼８を駆動するモータを制御し、かつ制御弁V1〜V7の開
閉を制御し、連続的に表示部にデジタル表示させながら
運転するようにするのがよい。Further, the agitator foil 21 is provided with a rotating impeller 5.
Along with the rotation of the motor 18 controlled by the motor 24 via the rotation shaft 22 and the pulley 23, for example, 300
Although it is configured to be driven at ~ 800 rpm, it may be linked by a single motor via a speed change or speed increasing mechanism or a clutch mechanism, and furthermore, each control valve V 1 to V 7 and each detection The unit and the timer are communicated to a computer unit (not shown) of the data processing unit to form a control circuit.
Internally fixed data in the computer unit including A / D converter and D / A converter that inputs the data of disintegration conditions such as raw material processing amount, raw material concentration, raw material concentration, inlet / outlet pressure difference, load, etc. as analog signals and converts them into digital signals the input data comparison process and controls the motor for driving the rotating impeller 5 and the stirring blade 8, and controls the opening and closing of the control valve V 1 ~V 7 and, operating while the digital display continuously display unit It is better to do it.
図中、Ｔはタイマ、Hpは負荷、Δｐは差圧、25は基台
である。In the figure, T is a timer, Hp is a load, Δp is a differential pressure, and 25 is a base.
本発明は、原料通し運転工程において、原料供給と精
選原料排出と、未離解繊維分を含む排液全量の原料供給
路への循環とを行う制御弁を開とし、他の給排操作は制
御弁を閉じて休止させながら運転を継続するようにし、
残留未離解片の離解工程において、微細異物を含む排液
の一部を原料供給路に循環しつつ、精選原料の一部を排
出するように制御弁の絞り開度を調整し、他の給排操作
は制御弁を閉じて休止させながら運転を継続するように
したので、有用繊維の回収率を大幅に高めることができ
ると共に、異物破砕程度も調整でき、製品品質を向上す
ることができた。また、粗大異物はもちろん、細かいご
みをも的確に分離することができるので、離解能力も大
きくなり、有用繊維と異物とを分離する精選処理能力が
向上し、原料中に混入する金属片，石，その他の異物等
を的確に効率よく分離することができる。しかも、原料
中の未離解片の量及び性質によって離解機能の操作及び
運転時間を調節でき、異物破砕程度も調節できるので、
スクリーンテールの処理システムを簡素化でき、効率の
よいスクリーン作業を実現することができる。According to the present invention, in a raw material passing operation step, a control valve for supplying a raw material, discharging a selected raw material, and circulating a whole amount of a waste liquid including an undisintegrated fiber to a raw material supply path is opened, and other supply and discharge operations are controlled. Close the valve and keep it running while continuing to stop,
In the disintegration process of the remaining undisintegrated pieces, while circulating a part of the waste liquid containing fine foreign matter to the raw material supply path, adjusting the throttle opening of the control valve so as to discharge a part of the selected raw material, Since the discharge operation was continued while the control valve was closed and stopped, the recovery rate of useful fibers could be greatly increased, the degree of foreign matter crushing could be adjusted, and the product quality could be improved. . In addition, since it is possible to accurately separate not only coarse foreign matter but also fine refuse, the defibration ability is increased, the selective processing capacity for separating useful fibers and foreign matter is improved, and metal fragments and stones mixed in the raw material are improved. , Other foreign matter, etc. can be accurately and efficiently separated. In addition, the operation and operation time of the disintegration function can be adjusted according to the amount and properties of the undisintegrated pieces in the raw material, and the degree of foreign matter crushing can also be adjusted.
The screen tail processing system can be simplified, and efficient screen work can be realized.
第１図は本発明の実施例の縦断側面図、第２図は第１図
のＩ−Ｉ線の切断平面図、第３図は使用状態の系統図、
第４図は処理工程のフローシート、第５図Ａ・Ｂは従来
例一使用状態の系統図である。 １……スクリーン、２……ケーシング、３……前処理
室、４……後処理室、５……インペラ、６……入口、７
……異物出口、８……攪拌翼、９……スクリーンバケッ
ト、10……排出口、11,12,13,14,15,16,17……流路、1
8,24……モータ、V1〜V7……制御弁。1 is a longitudinal side view of an embodiment of the present invention, FIG. 2 is a sectional plan view taken along line II of FIG. 1, FIG.
FIG. 4 is a flow chart of a processing step, and FIGS. 5A and 5B are system diagrams of a conventional example in use. DESCRIPTION OF SYMBOLS 1 ... Screen, 2 ... Casing, 3 ... Pre-processing chamber, 4 ... Post-processing chamber, 5 ... Impeller, 6 ... Inlet, 7
... Foreign matter outlet, 8 ... stirring blade, 9 ... screen bucket, 10 ... discharge port, 11, 12, 13, 14, 15, 16, 17 ... flow path, 1
8,24 ...... motor, V 1 ~V 7 ...... control valve.
Claims (1)
ーン装置よりのスクリーンテールをスクリーンのある密
閉ケーシングにおいて離解処理する際に、水張り工程及
び原料通し運転工程中に残留未離解片の離解工程を含
み、前記密閉ケーシングへの原料及び洗浄水の供給と粗
大異物，微細異物並びに精選有用繊維の排出との各操作
を各流路に配備される制御弁の開閉によって行うもので
あって、前記原料通し運転工程中にタイマ又は負荷又は
原料の入口，出口の圧力差のいずれか先に作動した検出
を優先して、残留未離解片の離解工程に移し、有用繊維
回収・洗浄工程と粗大異物排出工程及び微細異物排出工
程とを順次行い、各工程をタイマによって所定時分継続
して運転するようにした製紙用分離処理方法において、 前記原料通し運転工程は、原料供給と精選原料排出と、
未離解繊維分を含む排液全量の原料供給路への循環とを
行う制御弁を開とし、他の給排操作は制御弁を閉じて休
止させながら運転を継続するようにし、 前記残留未離解片の離解工程は、微細異物を含む排液の
一部を原料供給路に循環しつつ、精選原料の一部を排出
するように制御弁の絞り開度を調整し、他の給排操作は
制御弁を閉じて休止させながら運転を継続するようにし
たことを特徴とする製紙用分離処理方法。When the screen tail from a round hole screen device and a slit screen device is defibrated in a closed casing having a screen, the method includes a defibration step of remaining undisintegrated pieces during a water filling step and a raw material passing operation step, Each operation of supplying the raw material and the washing water to the closed casing and discharging the coarse foreign matter, the fine foreign matter, and the selected useful fiber is performed by opening and closing a control valve provided in each flow path. Priority is given to the detection of whether the timer or the load or the pressure difference between the inlet and outlet of the raw material has come first, and the process is shifted to the defibration process of the remaining undisintegrated pieces, the useful fiber collection / cleaning process, the coarse foreign matter discharge process and the fine And a foreign matter discharging step. The method for separating paper for papermaking, in which each step is continuously performed by a timer for a predetermined time, In the process, raw material supply and selected raw material discharge,
Opening a control valve that circulates the entire amount of drainage including the undisintegrated fiber to the raw material supply path, and continuing the other supply and discharge operations while closing and suspending the control valve to continue the operation. In the piece disintegration process, while circulating a part of the waste liquid containing fine foreign matter to the raw material supply path, adjusting the throttle opening of the control valve so as to discharge a part of the selected raw material, other supply and discharge operations are performed. A separation method for papermaking, wherein the operation is continued while the control valve is closed and stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1052884A JP2762362B2 (en) | 1989-03-07 | 1989-03-07 | Separation treatment method for papermaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1052884A JP2762362B2 (en) | 1989-03-07 | 1989-03-07 | Separation treatment method for papermaking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02234992A JPH02234992A (en) | 1990-09-18 |
| JP2762362B2 true JP2762362B2 (en) | 1998-06-04 |
Family
ID=12927305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1052884A Expired - Fee Related JP2762362B2 (en) | 1989-03-07 | 1989-03-07 | Separation treatment method for papermaking |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2762362B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950000040Y1 (en) * | 1990-02-21 | 1995-01-07 | 가부시기가이샤 사토미 세이사쿠쇼 | Screening-apparatus of paper stock |
| JP5912684B2 (en) * | 2012-03-08 | 2016-04-27 | 日本車輌製造株式会社 | Disc type filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932594B2 (en) * | 1979-12-27 | 1984-08-09 | 相川鉄工株式会社 | Pressure type composite screen for paper manufacturing |
| JPS61266687A (en) * | 1985-05-16 | 1986-11-26 | 株式会社 サトミ製作所 | Apparatus for treating hardly dissociable old paper |
-
1989
- 1989-03-07 JP JP1052884A patent/JP2762362B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02234992A (en) | 1990-09-18 |
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