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JPH0718111B2 - Fiber suspension flotation equipment - Google Patents

Fiber suspension flotation equipment

Info

Publication number
JPH0718111B2
JPH0718111B2 JP12560986A JP12560986A JPH0718111B2 JP H0718111 B2 JPH0718111 B2 JP H0718111B2 JP 12560986 A JP12560986 A JP 12560986A JP 12560986 A JP12560986 A JP 12560986A JP H0718111 B2 JPH0718111 B2 JP H0718111B2
Authority
JP
Japan
Prior art keywords
suspension
outlet
mixing
section
fiber suspension
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 - Lifetime
Application number
JP12560986A
Other languages
Japanese (ja)
Other versions
JPS61282492A (en
Inventor
ターゲ・フーベルト・グランクヴイスト
ペル・アンデルス・ボヴイン
Original Assignee
シユンドス・デフイブラト−ル・アクテイエボラ−グ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シユンドス・デフイブラト−ル・アクテイエボラ−グ filed Critical シユンドス・デフイブラト−ル・アクテイエボラ−グ
Publication of JPS61282492A publication Critical patent/JPS61282492A/en
Publication of JPH0718111B2 publication Critical patent/JPH0718111B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/08—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/026—Separating fibrous materials from waste
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • 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
    • Y02W30/64—Paper recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Description

【発明の詳細な説明】 発明の分野 本発明は繊維懸濁液から固体粒子の形をした浮遊不純物
を除去するための装置に係わる。Description: FIELD OF THE INVENTION The present invention relates to an apparatus for removing airborne impurities in the form of solid particles from a fiber suspension.

従来の技術 不純物を浮遊させるためにし、懸濁液に気泡を混入して
分散させることにより、気泡が不純物に付着して不純物
を混合した泡が形成されるようにする。その後この泡を
懸濁液から除去すればよい。2. Description of the Related Art In order to suspend impurities and to mix and disperse air bubbles in a suspension, the air bubbles adhere to the impurities to form bubbles in which the impurities are mixed. The foam may then be removed from the suspension.

この種の浮遊方法は古新聞の紙パルプから印刷インキを
除去する方法として周知であり、紙パルプの懸濁液の中
に処理用空気を吹き込んだ後、この懸濁液を浮遊槽の下
部に通す方法が行なわれている。この方法の空気の混合
は、例えばスエーデン特許第7704203-4号明細書に開示
されているような特殊な混合室内で行なうことができ
る。浮遊槽へ導入する前に、懸濁液を薄い層として混合
室内を流し、それと同時に空気をこの層の中に横方向か
ら吹き入れる。所が特に懸濁液の流量が大きい場合は、
気泡を均等に分散するのが困難であることが分かった。
このことは例えば、懸濁液を円筒状の浮遊槽の中に接線
方向で導入する際、槽の中で懸濁液が回転する程の高速
度にする場合に当てはまる。懸濁液を回転状体にさせて
おく目的は、不純物を豊富に含む泡を槽内の懸濁液の表
面から除去し易いようにするためである。This type of flotation method is well known as a method for removing printing ink from old newspaper paper pulp. There is a way to pass. The mixing of air in this way can be carried out in a special mixing chamber as disclosed, for example, in Swedish Patent No. 7704203-4. Before being introduced into the suspension tank, the suspension is flushed through the mixing chamber as a thin layer, while air is blown laterally into this layer. Where the flow rate of the suspension is particularly high,
It has been found difficult to evenly distribute the bubbles.
This is the case, for example, when introducing the suspension tangentially into a cylindrical suspension tank, at such a high speed that the suspension rotates in the tank. The purpose of leaving the suspension in a rotating body is to facilitate removal of bubbles rich in impurities from the surface of the suspension in the bath.

本発明は以上に述べたような欠点を無くした新しい設計
の混合装置に係わる。本発明の特徴は特許請求の範囲か
ら明白な通りである。The present invention relates to a new design of mixing device which eliminates the above-mentioned drawbacks. Features of the invention will be apparent from the appended claims.

次に、本発明の実施態様を示した添付図面を参照しなが
ら、本発明について詳細に説明する。Next, the present invention will be described in detail with reference to the accompanying drawings showing the embodiments of the present invention.

本発明の具体例 図示した混合装置は、パルプ懸濁液の中に空気を１〜２
％の濃度で混合することを目的としている。DETAILED DESCRIPTION OF THE INVENTION The illustrated mixing device has 1-2 air in the pulp suspension.
It is intended to be mixed at a concentration of%.

混合装置は通路の形をとる入口部１を含んでおり、その
断面は流れの方向に向かって徐々に高さが減少すると共
に幅が拡大して、円形から長方形へと変化している（第
１図、上面図参照）。入口部１が混合部２となり、混合
部２が出口部３へと変わっている。通路の幅は混合部２
と出口部３を通じて変わらないが、その高さ、従って断
面積は出口部３において連続的に増大している。出口部
３の上下隔壁は望ましくは５〜10度、最も望ましくは７
度の一定角度で拡開している（第２図、側面図参照）。The mixing device comprises an inlet part 1 in the form of a passage, the cross-section of which gradually decreases in height and widens in the direction of flow, changing from circular to rectangular (first (See Figure 1, top view). The inlet section 1 becomes a mixing section 2, and the mixing section 2 is changed to an outlet section 3. The width of the passage is the mixing section 2
Although it does not change through the outlet section 3, its height, and thus its cross-sectional area, continuously increases at the outlet section 3. The upper and lower partition walls of the outlet part 3 are preferably 5 to 10 degrees, most preferably 7 degrees.
It spreads out at a constant angle (see Fig. 2, side view).

混合部２の断面は長方形であり、その最も狭い部分の高
さが15〜25mmである。混合部２の２長辺部分の各々に空
気供給装置４が連結されており、この空気供給装置は混
合部２に連通するノズルを有しており、ノズルには0.2
〜0.7mm幅の空隙部５が形成されている。空隙部は出口
部３、即ち繊維懸濁液の流れの方向に向かって開口して
いる。どちらの空隙開口部も、混合部２の最も細くなっ
た部分の直後に出口側に位置している（第３図参照）。
混合部２のこの最も細くなった部分から、続く出口部へ
と通路の高さが増して行く。The cross section of the mixing part 2 is rectangular, and the height of the narrowest part thereof is 15 to 25 mm. An air supply device 4 is connected to each of the two long side portions of the mixing section 2, and this air supply apparatus has a nozzle communicating with the mixing section 2, and the nozzle has a nozzle of
A void portion 5 having a width of up to 0.7 mm is formed. The void portion is open toward the outlet portion 3, that is, in the flow direction of the fiber suspension. Both void openings are located on the outlet side immediately after the narrowest part of the mixing section 2 (see Fig. 3).
The height of the passage increases from this narrowest part of the mixing part 2 to the following outlet part.

空気供給装置４の各々に２つのノズル部分6,7が形成さ
れている。入口側（上流位置）のノズル部分６には出口
側（下流位置）のノズル部分７に向かって延びる舌状片
８が設けられている。この舌状片８が出口側のノズル部
分７と共に空隙部５を形成しており、この空隙の開口幅
は0.2〜0.7mm、適当なものとしては0.4〜0.6mm、望まし
くは約0.5mmである。この様な構成によって、空隙開口
部５が繊維懸濁液の流れの方向に向けられるのである
が、これは特に重要な構成である。またノズル及び舌状
片は、空気流が空隙５を通って流出する直前に少なくと
も90度偏向するような構成とする必要がある。ノズル部
分6,7は混合部２の横方向溝９の中に配置し、バー10に
よって提位置に保持する。バー10とノズル部分6,7の間
にシール材11を設ける。空気は送風管12を介して圧力を
かけずに送る。Two nozzle parts 6, 7 are formed in each of the air supply devices 4. The nozzle portion 6 on the inlet side (upstream position) is provided with a tongue 8 extending toward the nozzle portion 7 on the outlet side (downstream position). This tongue 8 together with the nozzle part 7 on the outlet side forms a cavity 5, the opening width of this cavity being 0.2 to 0.7 mm, suitably 0.4 to 0.6 mm, preferably about 0.5 mm. . With such an arrangement, the void openings 5 are directed in the direction of the fiber suspension flow, which is a particularly important arrangement. Also, the nozzle and tongue should be configured to deflect at least 90 degrees just before the airflow exits through the void 5. The nozzle parts 6, 7 are arranged in the transverse groove 9 of the mixing part 2 and are held in the feeding position by the bar 10. A seal material 11 is provided between the bar 10 and the nozzle portions 6 and 7. The air is sent through the blower pipe 12 without applying pressure.

空隙開口部の構成と配置を以上のようにすることで、懸
濁液が空隙開口部を通過する際に空気が自動吸気式に供
給される。驚くべきことに、この方法で次の浮遊工程に
最適の大きさの気泡が得られることが分かった。この方
法で流れの状体を制御しながら空気を混入した場合、10
〜25％の空気を繊維懸濁液の中に混入することができ
る。最も細い部分を通る流量は７〜11m/秒、望ましくは
約9m/秒とする。By configuring and arranging the void openings as described above, when the suspension passes through the void openings, air is supplied in an automatic intake method. Surprisingly, it has been found that this method results in optimally sized bubbles for the next flotation step. When air is mixed in while controlling the flow condition by this method, 10
~ 25% air can be incorporated into the fiber suspension. The flow rate through the thinnest portion is 7 to 11 m / sec, preferably about 9 m / sec.

出口部３の長さは、懸濁液が出口部を出て、次の浮遊槽
（不図示）へ流入する時の所要速度に合わせて調節す
る。出口部３の長さとして適当なのは、最も細い部分と
出口部の端部の面積比が1:4〜1:6となるようなものであ
る。出口部をこのように構成する目的は、懸濁液の流れ
の平衡をとると共に、懸濁液中に気泡を均等に分散する
ようにすることにより、次の浮遊工程を容易にすること
にある。The length of the outlet 3 is adjusted according to the required speed when the suspension exits the outlet and flows into the next floating tank (not shown). A suitable length of the outlet 3 is such that the area ratio of the thinnest part to the end of the outlet is 1: 4 to 1: 6. The purpose of configuring the outlet part in this way is to balance the flow of the suspension and to evenly disperse the air bubbles in the suspension to facilitate the next floating step. .

本発明は上述の実施態様に限定されるものではなく、発
明の趣旨の範囲内で変更することができる。The present invention is not limited to the above-mentioned embodiments, but can be modified within the scope of the invention.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明による装置の上面図、体２図は同じ装置
の側面図、第３図は第１図のIII−III線に沿って取った
混合部の垂直縦断面図である。 １……入口部、２……混合部、３……出口部、４……空
気供給装置、５……空隙部、6,7……ノズル部分。1 is a top view of the device according to the invention, FIG. 2 is a side view of the same device, and FIG. 3 is a vertical longitudinal sectional view of the mixing section taken along the line III-III in FIG. 1 ... inlet part, 2 ... mixing part, 3 ... exit part, 4 ... air supply device, 5 ... void part, 6,7 ... nozzle part.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】繊維懸濁液の中に気泡を混入して前記繊維
懸濁液から不純物を除去できるような浮遊を起こすため
の装置であって、入口部と、断面が長方形の混合物と、
前記混合部から拡開している出口部とを備えた通路と、
前記混合部の２つの長辺部分に夫々連通するノズルを有
する空気供給装置とを含んで成り、前記空気供給装置の
各ノズルは0.2〜0.7mm幅の空隙開口部を有しており、前
記ノズルは、高さ15〜25mmの混合部の最も細い部分の直
後に出口側に配置されていると共に、空気流が前記空隙
開口部を通って混合部に流出する直前に、少なくとも90
°偏向させる舌状片を有しており、前記出口部が角度５
〜10度で拡開していることを特徴とする装置。1. An apparatus for causing suspension so that air bubbles can be mixed into a fiber suspension to remove impurities from the fiber suspension, the inlet section and the mixture having a rectangular cross section,
A passageway with an outlet opening from the mixing section,
An air supply device having nozzles that respectively communicate with two long side portions of the mixing portion, each nozzle of the air supply device having a void opening of 0.2 to 0.7 mm in width. Is located on the outlet side immediately after the thinnest part of the mixing section with a height of 15-25 mm and at least 90% immediately before the airflow exits the mixing section through the void opening.
It has a tongue that deflects the
A device characterized by being expanded at ~ 10 degrees. 【請求項２】前記通路の最も細い部分と出口部端部の面
積比が1:4〜1:6であることを特徴とする、特許請求の範
囲第１項に記載の装置。2. The device according to claim 1, wherein the area ratio of the narrowest portion of the passage to the end of the outlet is 1: 4 to 1: 6.
JP12560986A 1985-05-31 1986-05-30 Fiber suspension flotation equipment Expired - Lifetime JPH0718111B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8502696-1 1985-05-31
SE8502696A SE8502696L (en) 1985-05-31 1985-05-31 DEVICE FOR FLOTATION OF FIBER SUSPENSIONS

Publications (2)

Publication Number Publication Date
JPS61282492A JPS61282492A (en) 1986-12-12
JPH0718111B2 true JPH0718111B2 (en) 1995-03-01

Family

ID=20360410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12560986A Expired - Lifetime JPH0718111B2 (en) 1985-05-31 1986-05-30 Fiber suspension flotation equipment

Country Status (5)

Country Link
JP (1) JPH0718111B2 (en)
KR (1) KR860009188A (en)
ES (1) ES296649Y (en)
FI (1) FI862302L (en)
SE (1) SE8502696L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5236090A (en) * 1990-05-30 1993-08-17 Sulzer-Escher Wyss Gmbh Flotation-deinking-device
ZA919256B (en) * 1990-11-23 1992-11-25 Atomaer Pty Ltd Gas particle formation
FR2727441B1 (en) * 1994-11-28 1997-01-31 Lamort E & M IMPROVEMENTS ON AIR INJECTION DEVICES IN A PULP OF PAPER TO DE-INK THEM
EP1958697A4 (en) * 2005-12-07 2013-06-26 Taiheiyo Cement Corp Apparatus for removing of unburned carbon from fly ash and relevant removing method

Also Published As

Publication number Publication date
FI862302A7 (en) 1986-12-01
FI862302L (en) 1986-12-01
FI862302A0 (en) 1986-05-30
ES296649U (en) 1987-12-01
KR860009188A (en) 1986-12-20
SE8502696L (en) 1986-12-18
ES296649Y (en) 1988-05-16
SE8502696D0 (en) 1985-05-31
JPS61282492A (en) 1986-12-12

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