JP2008050738A - Screen apparatus - Google Patents

Screen apparatus Download PDF

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Publication number
JP2008050738A
JP2008050738A JP2006260606A JP2006260606A JP2008050738A JP 2008050738 A JP2008050738 A JP 2008050738A JP 2006260606 A JP2006260606 A JP 2006260606A JP 2006260606 A JP2006260606 A JP 2006260606A JP 2008050738 A JP2008050738 A JP 2008050738A
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JP
Japan
Prior art keywords
screen
raw material
convex portion
chamber
papermaking
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.)
Granted
Application number
JP2006260606A
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Japanese (ja)
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JP4909693B2 (en
Inventor
Yoshihiko Aikawa
川 叔 彦 相
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Aikawa Iron Works Co Ltd
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Aikawa Iron Works Co Ltd
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Application filed by Aikawa Iron Works Co Ltd filed Critical Aikawa Iron Works Co Ltd
Priority to JP2006260606A priority Critical patent/JP4909693B2/en
Priority to TW096123256A priority patent/TW200813294A/en
Priority to KR1020070067405A priority patent/KR101297124B1/en
Priority to CA002593807A priority patent/CA2593807A1/en
Priority to US11/826,234 priority patent/US20080017342A1/en
Priority to EP07112515A priority patent/EP1882773B1/en
Priority to ES07112515T priority patent/ES2376903T3/en
Priority to CN2007101370400A priority patent/CN101113579B/en
Publication of JP2008050738A publication Critical patent/JP2008050738A/en
Publication of JP4909693B2 publication Critical patent/JP4909693B2/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D21F1/74—Pulp catching, de-watering, or recovering; Re-use of pulp-water using cylinders

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen apparatus having an improved effect for separating good fibers from foreign matters in a raw material for paper making. <P>SOLUTION: This screen apparatus S includes a closed casing 1 having a paper raw material-supplying port 1a, a purified paper raw material-discharging port 1b placed above the paper raw material-supplying port 1a, and a foreign matter-discharging port 1c placed above the purified paper raw material-discharging port 1b, a screen 2 which divides the inside of the closed casing 1 into the first chamber 1A and the second chamber 1B, separates the foreign matters in the paper raw material, has a cylindrical shape whose both ends are opened, has round hole-like or slit-like openings in the side faces, and is vertically disposed in the closed casing 1 so that the height direction is in a vertical direction, a rotor 7 which is disposed on the inside of the screen 2 in the first chamber 1A and includes a stirring member 7a for stirring the paper raw material in the closed casing 1, and a water supply passage 10 attached to the closed casing 1 so that a water spouting port 10a opposes the top end face 7T of the rotor 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、製紙原料をスクリーンの内側から外側に向かって流入させて精選するスク
リーン装置に係り、特に、製紙原料中の異物と良質繊維の分別効果を向上させたスクリー
ン装置に関する。 The present invention relates to a screen device that carefully selects a papermaking raw material from the inside to the outside of the screen, and more particularly to a screen device that improves the effect of separating foreign substances and high-quality fibers in the papermaking raw material.

従来、スクリーン装置、例えば、製紙原料をスクリーンの内側から外側に向かって流
入させて精選する所謂アウトワード式スクリーン装置（セントリフューガル形）にあって
は、スクリーン内に受け入れた製紙原料をスクリーン内に設けた攪拌部材により攪拌し、
スクリーンを介して製紙原料中の異物を除去して製紙原料を精選している（例えば、特許
文献１参照）。
特開２００４ー１３７６２１号公報（図１） 2. Description of the Related Art Conventionally, in a screen device, for example, a so-called outward type screen device (centrifugal type) in which papermaking raw materials are flown from the inside toward the outside of the screen, the papermaking raw materials received in the screen are contained in the screen. Stirring with the stirring member provided in
A foreign material in the papermaking raw material is removed through a screen to carefully select the papermaking raw material (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2004-137621 (FIG. 1)

しかしながら、上記の「両端部が開口した円筒形状のスクリーンを有したスクリーン
装置」にあっては、スクリーンの開口した端部より下流側には、製紙原料の流れを阻害す
るものがなく、該製紙原料はケーシングの外へとそのまま放出され、スクリーンによる分
別効果の向上を図る点において、改善の余地があるという問題点があった。 However, in the above-mentioned “screen apparatus having a cylindrical screen having both ends open”, there is nothing that obstructs the flow of the papermaking raw material downstream from the open end of the screen. The raw material is discharged out of the casing as it is, and there is a problem that there is room for improvement in terms of improving the separation effect by the screen.

本発明は、上述した問題点を除去するようにしたスクリーン装置を提供することを目
的とする。 An object of the present invention is to provide a screen device that eliminates the above-described problems.

本発明のスクリーン装置は、製紙原料供給口、この製紙原料供給口より上に位置する
精選製紙原料排出口、この精選製紙原料排出口より上に位置する異物排出口とを備えた密
閉ケーシングと、この密閉ケーシング内を第１の室と第２の室に区分し、製紙原料中の異
物を分別し、両端部が開口した円筒形状で、側面に丸孔又はスリット状の開口部を有し、
前記高さの方向が垂直方向を向くように前記密閉ケーシング内に立設したスクリーンと、
このスクリーンの開口した両端部は、上方の開口部と下方の開口部があり、前記上方の開
口部は前記異物排出口より下に位置し、前記下方の開口部は前記製紙原料供給口より上に
位置し、前記製紙原料を前記第１の室に下方から供給するように、前記製紙原料供給口に
接続される製紙原料供給通路と、前記第１の室内にあって、前記スクリーンの内側に配置
され、前記密閉ケーシング内の前記製紙原料を攪拌する攪拌部材を外周に備えたロータと
、前記第２の室に連通し、前記スクリーンを介して精選された前記製紙原料を前記密閉
ケーシングの外へ導く、前記精選製紙原料排出口に接続される精選製紙原料排出通路と、
前記第１の室に連通し、前記スクリーンを通過しない前記製紙原料中の異物を前記密閉
ケーシングの外へ導く、前記異物排出口に接続される異物排出通路と、水の噴出口が前記
ロータの上端面に対向するように、前記密閉ケーシングに取り付けられた水供給通路とを
備えたものである。 The screen device of the present invention is a sealed casing provided with a papermaking raw material supply port, a carefully selected papermaking material discharge port located above the papermaking raw material supply port, and a foreign matter discharge port located above the carefully selected papermaking material discharge port; The inside of this sealed casing is divided into a first chamber and a second chamber, separating foreign matter in the papermaking raw material, in a cylindrical shape with both ends open, and having a round hole or a slit-like opening on the side,
A screen erected in the sealed casing such that the direction of the height is in the vertical direction;
The open ends of the screen have an upper opening and a lower opening, the upper opening is located below the foreign material discharge port, and the lower opening is above the papermaking material supply port. The papermaking raw material supply passage is connected to the papermaking raw material supply port so as to supply the papermaking raw material to the first chamber from below, and is located inside the screen. A rotor provided on the outer periphery with a stirring member arranged to stir the papermaking raw material in the sealed casing, and communicated with the second chamber, and the papermaking raw material selected through the screen is placed outside the sealed casing. A carefully selected papermaking material discharge passage connected to the carefully selected papermaking material discharge port,
A foreign matter discharge passage connected to the foreign matter discharge port and leading to the foreign matter in the papermaking raw material that communicates with the first chamber and does not pass through the screen is connected to the foreign matter discharge port. A water supply passage attached to the hermetic casing is provided so as to face the upper end surface.

また、請求項２記載のスクリーン装置は、請求項１記載のスクリーン装置において、
スクリーンの中途にリング部が設けられ、このリング部により前記スクリーンは、上流側スクリーン部と下流側スクリーン部に区画されると共に、前記リング部には、第１の室に希釈水を導入する希釈水導入口が設けられ、この希釈水導入口に連通し、密閉ケーシングを介して設けられた希釈水通路と、前記リング部のロータに面する側に設けられた凹凸部と、この凹凸部の凸部は、前記スクリーンの内壁面より突出するように設けられ、前記凹凸部の前記凸部の先端部と、前記凸部の先端部よりケーシングの垂直方向に対して低い位置にある前記凸部の後端部とを有し、前記ロータの回転方向に対して前記凸部の先端部が前記凸部の後端部より近づくように傾斜しているものである。 The screen device according to claim 2 is the screen device according to claim 1,
A ring portion is provided in the middle of the screen, and the screen is divided into an upstream screen portion and a downstream screen portion by the ring portion, and the ring portion is diluted by introducing dilution water into the first chamber. A water introduction port is provided, communicated with the dilution water introduction port, a dilution water passage provided through a sealed casing, an uneven portion provided on the ring portion facing the rotor, and the uneven portion A convex portion is provided so as to protrude from the inner wall surface of the screen, and the convex portion at the tip of the convex portion of the concave and convex portion and the convex portion at a position lower than the leading end of the convex portion with respect to the vertical direction of the casing And a tip end portion of the convex portion is inclined with respect to the rotation direction of the rotor so as to approach the rear end portion of the convex portion.

また、請求項３記載のスクリーン装置は、請求項１記載のスクリーン装置において、
スクリーンの中途にリング部が設けられ、このリング部により前記スクリーンは、上流側スクリーン部と下流側スクリーン部に区画されると共に、前記リング部には、第１の室に希釈水を導入する希釈水導入口が設けられ、この希釈水導入口に連通し、密閉ケーシングを介して設けられた希釈水通路と、前記リング部のロータに面する側に設けられた凹凸部と、この凹凸部の凸部は、前記スクリーンの内壁面より突出しないように設けられ、前記凹凸部の前記凸部の先端部と、前記凸部の先端部よりケーシングの垂直方向に対して低い位置にある前記凸部の後端部とを有し、前記ロータの回転方向に対して前記凸部の先端部が前記凸部の後端部より近づくように傾斜しているものである。 The screen device according to claim 3 is the screen device according to claim 1,
A ring portion is provided in the middle of the screen, and the screen is divided into an upstream screen portion and a downstream screen portion by the ring portion, and the ring portion is diluted by introducing dilution water into the first chamber. A water introduction port is provided, communicated with the dilution water introduction port, a dilution water passage provided through a sealed casing, an uneven portion provided on the ring portion facing the rotor, and the uneven portion A convex portion is provided so as not to protrude from the inner wall surface of the screen, and the convex portion at the tip of the convex portion of the concave and convex portion and the convex portion at a position lower than the front end of the convex portion with respect to the vertical direction of the casing And a tip end portion of the convex portion is inclined with respect to the rotation direction of the rotor so as to approach the rear end portion of the convex portion.

請求項１記載のスクリーン装置によれば、水の噴出口がロータの上端面に対向するよ
うに、密閉ケーシングに取り付けられた水供給通路を備えているため、ロータの上端面に
衝突した水は、略水平方向に流れて、スクリーンの上方の開口部から精選製紙原料排出口
に向かう製紙原料の流れを阻害するように作用し、つまり、リゼクトシーリングして、異
物排出口側に流出する繊維を第１の室の上流側に押し戻すように作用して、製紙原料中の
異物と良質繊維の分別効果を向上させることができる。 According to the screen device of claim 1, since the water supply passage is attached to the hermetic casing so that the water outlet faces the upper end surface of the rotor, the water colliding with the upper end surface of the rotor is , Which flows in a substantially horizontal direction and acts to inhibit the flow of the papermaking raw material from the opening above the screen toward the carefully selected papermaking raw material discharge port, that is, the fiber that is reject-sealed and flows out to the foreign material discharge port side Can be pushed back to the upstream side of the first chamber to improve the effect of separating foreign substances and high-quality fibers in the papermaking raw material.

また、請求項２記載のスクリーン装置によれば、上述した請求項１記載の発明の効果
に加え、希釈水導入口よりの希釈水により、下流側に向かう製紙原料の流れを阻害するよ
うに作用し、製紙原料中の異物と良質繊維の分別効果を向上させ、しかも、製紙原料が上
流側でスクリーンを通過し、濃度が高くなった製紙原料を希釈水により希釈し、良質繊維
の分別効果を向上させ、更に、リング部のロータに面する側に設けられた凹凸部の凸部は、ロータの回転方向に対して前記凸部の先端部が前記凸部の後端部より近づくように傾斜しているため、前記凸部に衝突した製紙原料中の未溶解片は、離解すると共に、製紙原料の上流側に戻されるように作用して、製紙原料中の異物と良質繊維の分別効果をより向上させることができる。 Moreover, according to the screen apparatus of Claim 2, in addition to the effect of invention of Claim 1 mentioned above, it acts so that the flow of the papermaking raw material which goes downstream may be inhibited with the dilution water from a dilution water inlet. In addition, it improves the separation effect of foreign substances and good quality fibers in the papermaking raw material, and the papermaking raw material passes through the screen on the upstream side, and the concentrated papermaking raw material is diluted with diluting water. Further, the convex portion of the concave and convex portion provided on the side of the ring portion facing the rotor is inclined so that the tip end portion of the convex portion is closer to the rear end portion of the convex portion with respect to the rotation direction of the rotor. Therefore, the undissolved pieces in the papermaking raw material that collided with the projections are separated and act so as to be returned to the upstream side of the papermaking raw material. It can be improved further.

また、請求項３記載のスクリーン装置によれば、上述した請求項１記載の発明の効果
に加え、希釈水導入口よりの希釈水により、下流側に向かう製紙原料の流れを阻害するよ
うに作用し、製紙原料中の異物と良質繊維の分別効果を向上させ、しかも、製紙原料が上
流側でスクリーンを通過し、濃度が高くなった製紙原料を希釈水により希釈し、良質繊維
の分別効果を向上させ、更に、リング部のロータに面する側に設けられた凹凸部の凸部は
、ロータの回転方向に対して前記凸部の先端部が前記凸部の後端部より近づくように傾斜しているため、前記凸部に衝突した製紙原料中の未溶解片は、離解すると共に、製紙原料の上流側に戻されるように作用して、製紙原料中の異物と良質繊維の分別効果をより向上させることができる。 Moreover, according to the screen apparatus of Claim 3, in addition to the effect of invention of Claim 1 mentioned above, it acts so that the flow of the papermaking raw material which goes downstream may be inhibited with the dilution water from a dilution water inlet. In addition, it improves the separation effect of foreign substances and good quality fibers in the papermaking raw material, and the papermaking raw material passes through the screen on the upstream side, and the concentrated papermaking raw material is diluted with diluting water. Further, the convex portion of the concave and convex portion provided on the side of the ring portion facing the rotor is inclined so that the tip end portion of the convex portion is closer to the rear end portion of the convex portion with respect to the rotation direction of the rotor. Therefore, the undissolved pieces in the papermaking raw material that collided with the projections are separated and act so as to be returned to the upstream side of the papermaking raw material. It can be improved further.

本発明のスクリーン装置の一実施例を図面を参照して説明する。
図１〜図５において、Ｓはスクリーン装置で、スクリーン装置Ｓは、製紙原料供給口
１ａ、この製紙原料供給口１ａより上に位置する精選製紙原料排出口１ｂ、この精選製紙
原料排出口１ｂより上に位置する異物排出口１ｃ、製紙原料供給口１ａより下に位置する
重量異物排出口１ｄとを備えた密閉ケーシング１を有している。
このスクリーン装置Ｓは、製紙原料をスクリーン２の内側から外側に向かって流入さ
せて精選する所謂アウトワード式スクリーン装置（セントリフューガル形）で、製紙原料
（例えば、新聞古紙、段ボール古紙等）中に含まれる異物（例えば、プラスチック等）を
取り除いて精選する装置である。 An embodiment of the screen device of the present invention will be described with reference to the drawings.
1 to 5, S is a screen device. The screen device S includes a papermaking material supply port 1a, a carefully selected papermaking material discharge port 1b located above the papermaking material supply port 1a, and a carefully selected papermaking material discharge port 1b. It has a sealed casing 1 provided with a foreign matter discharge port 1c located above and a heavy foreign matter discharge port 1d located below the papermaking material supply port 1a.
This screen device S is a so-called outward type screen device (centrifugal type) that selectively feeds papermaking raw materials from the inside to the outside of the screen 2, and is used in papermaking raw materials (for example, used newspaper, corrugated paper, etc.). Is a device that removes foreign matters (for example, plastics, etc.) contained in the product and carefully selects them.

密閉ケーシング１内は、スクリーン２により、第１の室１Ａと第２の室１Ｂに区分さ
れている。
このスクリーン２は、製紙原料中の異物を分別し、両端部が開口した円筒形状で、側
面に丸孔又はスリット状の開口部を有し、高さの方向が垂直方向を向くように密閉ケーシ
ング１内に立設している。そして、スクリーン２の開口した両端部は、上方の開口部２Ａ
と下方の開口部２Ｂがあって、上方の開口部２Ａは、図１に示すように、異物排出口１ｃ
より下に位置し、下方の開口部２Ｂは製紙原料供給口１ａより上に位置している。
また、図１〜図５に示すＲは、スクリーン２の中途に設けられたリング部で、このリ
ング部Ｒによりスクリーン２は、上流側スクリーン部２１と下流側スクリーン部２２に区
画されると共に、リング部Ｒには、第１の室１Ａに希釈水を導入する希釈水導入口Ｒ１（
例えば、複数）が設けられている。
２０は、希釈水導入口Ｒ１に連通し、密閉ケーシング１を介して設けられた希釈水を
導入する希釈水通路である。リング部Ｒのロータ７に面する側には、スクリーン２の面よ
り突出するように設けられた凸部ＲＴ又は凹部ＲＯが設けられている（図３及び図５参照
）。 The sealed casing 1 is divided into a first chamber 1A and a second chamber 1B by a screen 2.
This screen 2 separates foreign matters in the papermaking raw material, has a cylindrical shape with both ends open, has a round hole or a slit-like opening on the side surface, and a sealed casing so that the height direction is in the vertical direction. 1 is standing up. And the both ends which the screen 2 opened are upper opening 2A.
And the lower opening 2B, and the upper opening 2A has a foreign matter discharge port 1c as shown in FIG.
The lower opening 2B is located above the papermaking material supply port 1a.
Moreover, R shown in FIGS. 1-5 is a ring part provided in the middle of the screen 2, and the screen 2 is divided into the upstream screen part 21 and the downstream screen part 22 by this ring part R, The ring portion R has a dilution water inlet R1 (introducing dilution water into the first chamber 1A).
For example, a plurality of) are provided.
A dilution water passage 20 communicates with the dilution water introduction port R1 and introduces dilution water provided via the sealed casing 1. On the side of the ring portion R facing the rotor 7, a convex portion RT or a concave portion RO provided so as to protrude from the surface of the screen 2 is provided (see FIGS. 3 and 5).

なお、リング部Rのロータ７に面する側にスクリーン２の面より突出するように設けられた凸部ＲＴは、図３に示すように、凸部の先端部Xと、この凸部の先端部Xよりケーシング１の垂直方向に対して低い位置にある凸部の後端部Yとを有し、ロータ７の回転方向（図３に示す矢印方向参照）に対して凸部の先端部Xが凸部の後端部Yより近づくように傾斜している。傾斜の角度は、例えば、３°〜４５°である。
これは、凸部ＲＴに衝突した製紙原料中の未溶解片が、離解すると共に、製紙原料の
上流側に戻されるように作用を受けて、製紙原料中の異物と良質繊維の分別効果をより向
上させるようにするためである。
また、上述した凸部ＲＴと凹部ＲＯを、言い換えれば、凸部ＲＴと凹部ＲＯは、リング部Ｒのロータ７に面する側に設けられた凹凸部であり、この凹凸部の凸部ＲＴは、スクリーン２の内壁面より突出するように設けられ、前記凹凸部の凸部ＲＴの先端部Ｘと、凸部ＲＴの先端部よりケーシング１の垂直方向に対して低い位置にある凸部ＲＴの後端部Ｙとを有し、ロータ７の回転方向（図３に示す矢印方向参照）に対して凸部ＲＴの先端部Ｘが凸部ＲＴの後端部Ｙより近づくように傾斜している。 Note that the convex portion RT provided so as to protrude from the surface of the screen 2 on the side facing the rotor 7 of the ring portion R includes a leading end portion X of the convex portion and a leading end of the convex portion as shown in FIG. And a rear end portion Y of the convex portion located at a position lower than the vertical direction of the casing 1 relative to the portion X, and the front end portion X of the convex portion with respect to the rotation direction of the rotor 7 (see the arrow direction shown in FIG. 3). Is inclined so as to approach the rear end Y of the convex portion. The inclination angle is, for example, 3 ° to 45 °.
This is because the undissolved pieces in the papermaking raw material that collided with the convex part RT are disaggregated and returned to the upstream side of the papermaking raw material. It is for improving.
Further, the convex portion RT and the concave portion RO described above, in other words, the convex portion RT and the concave portion RO are concave and convex portions provided on the side of the ring portion R facing the rotor 7, and the convex portion RT of the concave and convex portion is The protrusion 2 is provided so as to protrude from the inner wall surface of the screen 2, and the protrusion X of the protrusion RT of the uneven portion and the protrusion RT at a position lower than the tip of the protrusion RT in the vertical direction of the casing 1. And a rear end Y, and the tip X of the convex portion RT is inclined with respect to the rotational direction of the rotor 7 (see the arrow direction shown in FIG. 3) so as to approach the rear end Y of the convex portion RT. .

図１に示す３は、製紙原料を第１の室１Ａに下方から供給するように、製紙原料供給
口１ａに接続される製紙原料供給通路で、４は、第２の室１Ｂに連通し、スクリーン２を
介して精選された製紙原料を密閉ケーシング１の外へ導く、精選製紙原料排出口１ｂに接
続される精選製紙原料排出通路で、５は、第１の室１Ａに連通し、スクリーン２を通過し
ない製紙原料中の異物（例えば、比較的軽い軽量な異物）を密閉ケーシング１の外へ導く
、異物排出口１ｃに接続される異物排出通路で、６は、第１の室１Ａに連通し、スクリー
ン２を通過しない製紙原料中の比較的重い重量異物を密閉ケーシング１の外へ導く、重量
異物排出口１ｄに接続される重量異物排出通路である。 1 is a papermaking raw material supply passage connected to the papermaking raw material supply port 1a so that the papermaking raw material is supplied to the first chamber 1A from below, and 4 is in communication with the second chamber 1B. A carefully selected papermaking material discharge passage connected to the carefully selected papermaking material discharge port 1b for guiding the carefully selected papermaking material to the outside of the hermetic casing 1 through the screen 2 is connected to the first chamber 1A. A foreign matter discharge passage connected to the foreign matter discharge port 1c that guides foreign matter (for example, relatively light and lightweight foreign matter) in the papermaking raw material that does not pass through the sealed casing 1, and 6 communicates with the first chamber 1A. The heavy foreign matter discharge passage is connected to the heavy foreign matter discharge port 1 d for guiding relatively heavy heavy foreign matter in the papermaking raw material that does not pass through the screen 2 to the outside of the sealed casing 1.

図１に示す７はロータで、ロータ７は、第１の室１Ａ内にあって、スクリーン２の内
側に配置され、密閉ケーシング１内の製紙原料を攪拌する攪拌部材７ａを外周に備えてい
る。ロータ７は、上流側が上流部７０、下流側が下流部７１となるように形成され、上流
部７０及び下流部７１の外周に設けられる攪拌部材７ａは、傾斜しており、該傾斜は、攪
拌部材７ａの略直線状部の下部７Ａが上部７Ｂよりロータ７の回転方向に向かうようにな
っている。ロータ７は、図示しないモータからの回転をベルト８、回転軸９を介して伝達
され、回転するようになっている。
また、図１に示す１０は、水の噴出口１０ａがロータ７の上端面７Ｔに対向（より望
ましくは、水の噴出口１０ａがロータ７の上端面７Ｔの中央に対向）するように、密閉ケ
ーシング１に取り付けられた水供給通路である。 1 is a rotor, and the rotor 7 is disposed in the first chamber 1A and is disposed inside the screen 2 and includes a stirring member 7a that stirs the papermaking raw material in the sealed casing 1 on the outer periphery. . The rotor 7 is formed so that the upstream side is the upstream portion 70 and the downstream side is the downstream portion 71, and the stirring member 7 a provided on the outer periphery of the upstream portion 70 and the downstream portion 71 is inclined, and the inclination is the stirring member. The lower part 7A of the substantially linear part 7a is directed in the rotational direction of the rotor 7 from the upper part 7B. The rotor 7 is rotated by transmitting rotation from a motor (not shown) via a belt 8 and a rotating shaft 9.
Further, 10 shown in FIG. 1 is hermetically sealed such that the water jet 10a faces the upper end surface 7T of the rotor 7 (more preferably, the water jet 10a faces the center of the upper end surface 7T of the rotor 7). A water supply passage attached to the casing 1.

従って、製紙原料が製紙原料供給通路３により密閉ケーシング１内に供給され、図示
しないモータからの回転をベルト８、回転軸９を介して伝達され、ロータ７が回転すると
、製紙原料中の異物は、スクリーン２を通過できず、第１の室内１Ａ内に貯留し、スクリ
ーン２を通過した製紙原料は、第２の室１Ｂ、精選製紙原料排出通路４を介して密閉ケー
シング１外へと導かれる。
なお、スクリーン２の中途においては、希釈水導入口Ｒ１よりの希釈水により、下流
側に向かう製紙原料の流れは阻害されるように作用を受けるため、製紙原料中の異物と良
質繊維の分別効果を向上させ、しかも、製紙原料が上流側でスクリーン２を通過し、濃度
が高くなった製紙原料は希釈水により希釈され、良質繊維の分別効果が向上し、更に、リ
ング部Ｒのロータ７に面する側に設けられ凸部ＲＴに衝突した製紙原料中の未溶解片は、
製紙原料の上流側に戻されるように作用を受けて、製紙原料中の異物と良質繊維の分別効
果をより向上させることができる。
また、第１の室内１Ａ内のスクリーン２の下流側においては、密閉ケーシング１に取
り付けられた第１の水供給通路１０の水の噴出口１０ａはロータ７の上端面７Ｔに対向す
るため、ロータ７の上端面７Ｔの中央に衝突した水は、略水平方向に流れて、スクリーン
２の上方の開口部２Ａから異物排出口１ｃに向かう製紙原料の流れを阻害するように作用
し、つまり、リゼクトシーリングして、異物排出口１ｃ側に流出する繊維を第１の室１Ａ
の上流側に押し戻すように作用して、製紙原料中の異物と良質繊維の分別効果を向上させ
る。
なお、異物排出通路５、重量異物排出通路６には、図示しない通路内を開閉するバル
ブにより、その開度を調整したり、又は、適宜開閉調整することにより、第１の室内１Ａ
内に貯留した異物を密閉ケーシング１の外へと導くようにしている。 Therefore, when the papermaking raw material is supplied into the sealed casing 1 through the papermaking raw material supply passage 3, rotation from a motor (not shown) is transmitted via the belt 8 and the rotating shaft 9, and when the rotor 7 rotates, foreign matter in the papermaking raw material is removed. The papermaking raw material that cannot pass through the screen 2 but is stored in the first chamber 1A and passes through the screen 2 is guided to the outside of the sealed casing 1 through the second chamber 1B and the carefully selected papermaking material discharge passage 4. .
In the middle of the screen 2, the diluting water from the diluting water introduction port R1 is affected so that the flow of the papermaking raw material toward the downstream side is obstructed. In addition, the papermaking raw material passes through the screen 2 on the upstream side, and the papermaking raw material having a high concentration is diluted with diluting water, so that the effect of separating high-quality fibers is improved. Undissolved pieces in the papermaking raw material that are provided on the facing side and collide with the convex portion RT are
By receiving the action so as to be returned to the upstream side of the papermaking raw material, it is possible to further improve the effect of separating foreign substances and high-quality fibers in the papermaking raw material.
Further, on the downstream side of the screen 2 in the first room 1A, the water jet 10a of the first water supply passage 10 attached to the hermetic casing 1 faces the upper end surface 7T of the rotor 7, so that the rotor The water colliding with the center of the upper end surface 7T of FIG. 7 flows in a substantially horizontal direction and acts to inhibit the flow of the papermaking raw material from the opening 2A above the screen 2 toward the foreign matter discharge port 1c. The first chamber 1 </ b> A allows the fibers to flow toward the foreign matter discharge port 1 c after performing seal sealing.
It acts to push back to the upstream side of the paper to improve the effect of separating foreign substances and good quality fibers in the papermaking raw material.
It should be noted that the foreign matter discharge passage 5 and the heavy foreign matter discharge passage 6 are adjusted by a valve for opening and closing a passage (not shown) or by appropriately opening and closing the first room 1A.
The foreign matter stored inside is guided out of the sealed casing 1.

なお、上述した実施例においては、下流側の攪拌部材７ａの下部７Ａの端部を希釈水
導入口Ｒ１に対向する位置まで、延ばしたが（図1参照）、本発明にあっては、これに限
らず、図６に示すように、希釈水導入口Ｒ１と対向する攪拌部材７ａの部位を削除するよ
うにしても良い。
また、ロータ７の上端面７Ｔは、平坦面としたが（図１参照）、本発明にあっては、
これに限らず、図６〜図８に示すように、突起（かき羽根）７Ｚを設け、突起（かき羽根
）７Ｚによる遠心力を利用して、水の噴出口１０ａからの水を水平方向に流れの向きを変
え、上述したリゼクトシーリングの効果を更に高めるようにしても良い。なお、図７に示
す矢印は、ロータ７の回転方向を示している。
また、図９に示すように、水の噴出口１０ａよりの水を突起（かき羽根）７Ｚに近接
するように、水の噴出口１０ａよりの水を案内するガイドＧを水の噴出口１０ａの周囲に
設け、ガイドＧの面とロータ７の上端面７Ｔと対向させるようにしても良い。
また、図５に示す凹部ＲOのリング部Ｒの円周方向の開口幅Ｗを凸部ＲTのリング部Ｒの円周方向の平坦面の長さＬより小さくしたが、本発明にあっては、これに限らず、図１０に示すように、逆に、凹部ＲOのリング部Ｒの円周方向の開口幅Ｗを凸部ＲTのリング部Ｒの円周方向の平坦面の長さＬより大きくするようにしても良い。 In the embodiment described above, the end of the lower portion 7A of the downstream stirring member 7a is extended to a position facing the dilution water inlet R1 (see FIG. 1). However, as shown in FIG. 6, the part of the stirring member 7a facing the dilution water inlet R1 may be deleted.
The upper end surface 7T of the rotor 7 is a flat surface (see FIG. 1).
Not limited to this, as shown in FIGS. 6 to 8, a protrusion (shaving blade) 7 </ b> Z is provided, and the water from the water outlet 10 a is horizontally applied by utilizing the centrifugal force generated by the protrusion (shaving blade) 7 </ b> Z. The direction of the flow may be changed to further enhance the effect of the above-described reject sealing. Note that the arrows shown in FIG. 7 indicate the rotation direction of the rotor 7.
Moreover, as shown in FIG. 9, the guide G which guides the water from the water jet 10a is used for the water jet 10a so that the water from the water jet 10a is close to the protrusion (scraper blade) 7Z. It may be provided in the periphery so as to face the surface of the guide G and the upper end surface 7T of the rotor 7.
Further, the opening width W in the circumferential direction of the ring portion R of the concave portion RO shown in FIG. 5 is smaller than the length L of the flat surface in the circumferential direction of the ring portion R of the convex portion RT. Not limited to this, as shown in FIG. 10, conversely, the opening width W in the circumferential direction of the ring portion R of the concave portion RO is larger than the length L of the flat surface in the circumferential direction of the ring portion R of the convex portion RT. You may make it enlarge.

なお、上述した実施例においては、リング部Rのロータ７に面する側にスクリーン２の面より突出するように凸部ＲＴを設けたが、本発明にあっては、これに限らず、図１１及び図１２に示すように、リング部Ｒのロータ７に面する側に凹凸部の凸部ＲＴは、スクリーン２の内壁面より突出しないように設けらるようにしても良い。図１１及び図１２に記載のものは、凸部ＲＴがスクリーン２の面（内壁）より突出しないことを除けば、図３〜図５に記載のものと同一であるため、図１１及び図１２に記載のものに、図３〜図５に記載のものと同一部分に同一符号を付して説明を一部省略する。
即ち、凹凸部の凸部ＲＴの先端部Ｘと、凸部ＲＴの先端部Ｘよりケーシング１の垂直方向に対して低い位置にある凸部ＲＴの後端部Ｙとを有し、ロータ７の回転方向［図１２（ｂ）に示す矢印方向参照］に対して凸部ＲＴの先端部Ｘが凸部ＲＴの後端部Ｙより近づくように傾斜している。
なお、隣接する凸部ＲＴの間に凹部ＲＯが位置し、凸部ＲＴ及び凹部ＲＯは、それぞれリング部Ｒに複数設けられている。
この図１１及び図１２に記載の凸部ＲＴは、図３〜図５に記載の凸部ＲＴと同様に、凸部ＲＴに衝突した製紙原料中の未溶解片は、離解すると共に、製紙原料の上流側に戻されるように作用して、製紙原料中の異物と良質繊維の分別効果をより向上させることができる。 In the embodiment described above, the convex portion RT is provided on the side of the ring portion R facing the rotor 7 so as to protrude from the surface of the screen 2. However, the present invention is not limited to this. As shown in FIGS. 11 and 12, the convex portion RT of the concavo-convex portion may be provided on the side of the ring portion R facing the rotor 7 so as not to protrude from the inner wall surface of the screen 2. 11 and 12 is the same as that shown in FIGS. 3 to 5 except that the convex portion RT does not protrude from the surface (inner wall) of the screen 2, and therefore FIGS. 11 and 12. The same reference numerals are given to the same parts as those shown in FIGS. 3 to 5 and the description thereof is partially omitted.
That is, it has a front end portion X of the convex portion RT of the concavo-convex portion and a rear end portion Y of the convex portion RT that is lower than the front end portion X of the convex portion RT with respect to the vertical direction of the casing 1. The tip portion X of the convex portion RT is inclined so as to approach the rear end portion Y of the convex portion RT with respect to the rotation direction [see the arrow direction shown in FIG.
In addition, the recessed part RO is located between adjacent convex part RT, and the convex part RT and the recessed part RO are provided with two or more by the ring part R, respectively.
11 and 12 is similar to the convex portion RT described in FIGS. 3 to 5, the undissolved pieces in the papermaking raw material colliding with the convex portion RT are disaggregated and the papermaking raw material is separated. Thus, the effect of separating foreign substances in the papermaking raw material from high-quality fibers can be further improved.

図１は、本発明の一実施例のスクリーン装置の概略的断面図である。FIG. 1 is a schematic cross-sectional view of a screen device according to an embodiment of the present invention. 図２は、図１の２−２線による概略的断面図である。FIG. 2 is a schematic cross-sectional view taken along line 2-2 of FIG. 図３は、図１のスクリーンの内部よりリング部付近のスクリーンを見た概略的図である。FIG. 3 is a schematic view of the screen near the ring portion as seen from the inside of the screen of FIG. 図４は、図１の一部を拡大して示す概略的一部拡大断面図である。FIG. 4 is a schematic partially enlarged sectional view showing a part of FIG. 1 in an enlarged manner. 図５は、図４の５−５線による概略的断面図である。FIG. 5 is a schematic cross-sectional view taken along line 5-5 of FIG. 図６は、図１と異なる他の実施例のスクリーン装置の概略的断面図である。FIG. 6 is a schematic cross-sectional view of a screen device of another embodiment different from FIG. 図７は、図６のロータの概略的平面図である。FIG. 7 is a schematic plan view of the rotor of FIG. 図８は、図６の一部を拡大して示す概略的一部拡大断面図である。FIG. 8 is a schematic partially enlarged sectional view showing a part of FIG. 6 in an enlarged manner. 図９は、図８と異なる他の実施例のスクリーン装置の概略的一部断面図である。FIG. 9 is a schematic partial sectional view of a screen device of another embodiment different from FIG. 図１０は、図５と異なる他の実施例のスクリーン装置の概略的一部断面図である。FIG. 10 is a schematic partial sectional view of a screen device of another embodiment different from FIG. 図１１は、図４と異なる他の実施例のスクリーン装置の概略的一部断面図である。FIG. 11 is a schematic partial sectional view of a screen device of another embodiment different from FIG. 図１２（ａ）は、図１１の１２−１２線による概略的断面図であり、図１２（ｂａ）は、図１２（ａ）のリング部をスクリーンの内側から概略的に見た図である。12A is a schematic cross-sectional view taken along line 12-12 of FIG. 11, and FIG. 12BA is a schematic view of the ring portion of FIG. 12A viewed from the inside of the screen. .

符号の説明Explanation of symbols

Ｓ スクリーン装置
１ 密閉ケーシング
１ａ 製紙原料供給口
１ｂ 精選製紙原料排出口
１ｃ 異物排出口
１Ａ 第１の室
１Ｂ 第２の室
２ スクリーン
７ ロータ
７ａ 攪拌部材
７Ｔ 上端面
１０ 水供給通路
１０ａ 水の噴出口 DESCRIPTION OF SYMBOLS S Screen apparatus 1 Airtight casing 1a Papermaking raw material supply port 1b Finely selected papermaking raw material discharge port 1c Foreign material discharge port 1A 1st chamber 1B 2nd chamber 2 Screen 7 Rotor 7a Stirring member 7T Upper end surface 10 Water supply passage 10a Water jet

Claims (3)

製紙原料供給口、この製紙原料供給口より上に位置する精選製紙原料排出口、この精
選製紙原料排出口より上に位置する異物排出口とを備えた密閉ケーシングと、
この密閉ケーシング内を第１の室と第２の室に区分し、製紙原料中の異物を分別し、
両端部が開口した円筒形状で、側面に丸孔又はスリット状の開口部を有し、前記高さの方
向が垂直方向を向くように前記密閉ケーシング内に立設したスクリーンと、
このスクリーンの開口した両端部は、上方の開口部と下方の開口部があり、
前記上方の開口部は前記異物排出口より下に位置し、前記下方の開口部は前記製紙原
料供給口より上に位置し、
前記製紙原料を前記第１の室に下方から供給するように、前記製紙原料供給口に接続
される製紙原料供給通路と、
前記第１の室内にあって、前記スクリーンの内側に配置され、前記密閉ケーシング内
の前記製紙原料を攪拌する攪拌部材を外周に備えたロータと、
前記第２の室に連通し、前記スクリーンを介して精選された前記製紙原料を前記密閉
ケーシングの外へ導く、前記精選製紙原料排出口に接続される精選製紙原料排出通路と、
前記第１の室に連通し、前記スクリーンを通過しない前記製紙原料中の異物を前記密
閉ケーシングの外へ導く、前記異物排出口に接続される異物排出通路と、
水の噴出口が前記ロータの上端面に対向するように、前記密閉ケーシングに取り付け
られた水供給通路とを備えたことを特徴とするスクリーン装置。 A sealed casing comprising a papermaking raw material supply port, a carefully selected papermaking material discharge port located above the papermaking raw material supply port, and a foreign matter discharge port located above the carefully selected papermaking material discharge port;
The inside of the sealed casing is divided into a first chamber and a second chamber, and foreign matters in the papermaking raw material are separated.
A cylindrical shape having both ends opened, a screen having a round hole or a slit-like opening on the side surface, and standing in the sealed casing so that the height direction faces the vertical direction;
The open ends of this screen have an upper opening and a lower opening,
The upper opening is located below the foreign matter discharge port, and the lower opening is located above the papermaking material supply port,
A papermaking raw material supply passage connected to the papermaking raw material supply port so as to supply the papermaking raw material to the first chamber from below;
A rotor provided in an outer periphery of the first chamber and disposed on the inner side of the screen and provided with an agitating member for agitating the papermaking raw material in the sealed casing;
A selected papermaking material discharge passage connected to the selected papermaking material discharge port, which communicates with the second chamber and guides the papermaking material selected through the screen to the outside of the sealed casing;
A foreign matter discharge passage connected to the foreign matter discharge port that communicates with the first chamber and guides foreign matter in the papermaking raw material that does not pass through the screen to the outside of the sealed casing;
A screen device comprising: a water supply passage attached to the hermetic casing so that a water jet port faces an upper end surface of the rotor. スクリーンの中途にリング部が設けられ、このリング部により前記スクリーンは、上
流側スクリーン部と下流側スクリーン部に区画されると共に、前記リング部には、第１の
室に希釈水を導入する希釈水導入口が設けられ、
この希釈水導入口に連通し、密閉ケーシングを介して設けられた希釈水通路と、
前記リング部のロータに面する側に設けられた凹凸部と、
この凹凸部の凸部は、前記スクリーンの内壁面より突出するように設けられ、
前記凹凸部の前記凸部の先端部と、前記凸部の先端部よりケーシングの垂直方向に対して低い位置にある前記凸部の後端部とを有し、前記ロータの回転方向に対して前記凸部の先端部が前記凸部の後端部より近づくように傾斜していることを特徴とする請求項１記載のスクリーン装置。 A ring portion is provided in the middle of the screen, and the screen is divided into an upstream screen portion and a downstream screen portion by the ring portion, and the ring portion is diluted by introducing dilution water into the first chamber. A water inlet is provided,
A dilution water passage that communicates with the dilution water inlet and is provided via a sealed casing;
An uneven portion provided on the side of the ring portion facing the rotor;
The convex part of the uneven part is provided so as to protrude from the inner wall surface of the screen,
A front end portion of the convex portion of the concavo-convex portion, and a rear end portion of the convex portion at a position lower than a front end portion of the convex portion with respect to the vertical direction of the casing, and with respect to the rotation direction of the rotor The screen apparatus according to claim 1, wherein the front end portion of the convex portion is inclined so as to approach the rear end portion of the convex portion. スクリーンの中途にリング部が設けられ、このリング部により前記スクリーンは、上
流側スクリーン部と下流側スクリーン部に区画されると共に、前記リング部には、第１の
室に希釈水を導入する希釈水導入口が設けられ、
この希釈水導入口に連通し、密閉ケーシングを介して設けられた希釈水通路と、
前記リング部のロータに面する側に設けられた凹凸部と、
この凹凸部の凸部は、前記スクリーンの内壁面より突出しないように設けられ、
前記凹凸部の前記凸部の先端部と、前記凸部の先端部よりケーシングの垂直方向に対して低い位置にある前記凸部の後端部とを有し、前記ロータの回転方向に対して前記凸部の先端部が前記凸部の後端部より近づくように傾斜していることを特徴とする請求項１記載のスクリーン装置。 A ring portion is provided in the middle of the screen, and the screen is divided into an upstream screen portion and a downstream screen portion by the ring portion, and the ring portion is diluted by introducing dilution water into the first chamber. A water inlet is provided,
A dilution water passage that communicates with the dilution water inlet and is provided via a sealed casing;
An uneven portion provided on the side of the ring portion facing the rotor;
The convex part of the uneven part is provided so as not to protrude from the inner wall surface of the screen,
A front end portion of the convex portion of the concavo-convex portion, and a rear end portion of the convex portion at a position lower than a front end portion of the convex portion with respect to the vertical direction of the casing, and with respect to the rotation direction of the rotor The screen apparatus according to claim 1, wherein the front end portion of the convex portion is inclined so as to approach the rear end portion of the convex portion.
JP2006260606A 2006-07-24 2006-09-26 Screen device Active JP4909693B2 (en)

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TW096123256A TW200813294A (en) 2006-07-24 2007-06-27 Screen apparatus
KR1020070067405A KR101297124B1 (en) 2006-07-24 2007-07-05 Screen apparatus
US11/826,234 US20080017342A1 (en) 2006-07-24 2007-07-13 Screen apparatus
CA002593807A CA2593807A1 (en) 2006-07-24 2007-07-13 Screen apparatus
EP07112515A EP1882773B1 (en) 2006-07-24 2007-07-16 Screen apparatus
ES07112515T ES2376903T3 (en) 2006-07-24 2007-07-16 Sieve apparatus
CN2007101370400A CN101113579B (en) 2006-07-24 2007-07-19 Screen apparatus

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CA2895789A1 (en) 2014-11-21 2016-05-21 Aikawa Iron Works Co., Ltd. Papermaking strainer, foreign material separation apparatus for papermaking, and manufacturing method of papermaking strainer
CN107427794B (en) * 2015-03-24 2021-05-07 M技术株式会社 Mixer
JP6517675B2 (en) * 2015-12-02 2019-05-22 相川鉄工株式会社 Paper screen device
KR101771371B1 (en) 2016-12-26 2017-08-24 나성주 screening machine for screening paper material, casing body for screening machine and screening basket

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KR101297124B1 (en) 2013-08-21
US20080017342A1 (en) 2008-01-24
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ES2376903T3 (en) 2012-03-20
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EP1882773A1 (en) 2008-01-30

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