JP2006144148A - Method for accelerating separation of impurity in waste paper pulp - Google Patents

Method for accelerating separation of impurity in waste paper pulp Download PDF

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JP2006144148A
JP2006144148A JP2004333253A JP2004333253A JP2006144148A JP 2006144148 A JP2006144148 A JP 2006144148A JP 2004333253 A JP2004333253 A JP 2004333253A JP 2004333253 A JP2004333253 A JP 2004333253A JP 2006144148 A JP2006144148 A JP 2006144148A
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pulp
concentration
waste paper
dehydrator
dehydrating
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Kyuichiro Sasaki
久一郎 佐々木
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FUKOKU KOGYO KK
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FUKOKU KOGYO KK
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    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To enable a chemical preparation to take effects well by enabling a pulp to be continuously dehydrated to about 30% pulp concentration without difficulty, and to enable a strong ink, an ash content or the like to be removed. <P>SOLUTION: The method for accelerating the separation of impurities in the waste paper pulp comprises cleaning and concentrating a disaggregated pulp so as to have about 6-7% concentration by a cooking pot 11, dehydrating the resultant pulp to about 20% concentration by a net-type dehydrator 13 of a first-step dehydration step, dehydrating the resultant pulp to about 30% concentration by a screw-type dehydrator 14 of a second-step dehydrating step, kneading the dehydrated pulp by adding the chemical preparation by a kneader 15, and aging the kneaded pulp in an aging tower 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、古紙パルプの処理工程において、不純物の分離を効率良く促進させる古紙パルプの不純物分離促進方法に関するものである。   The present invention relates to a method for promoting impurity separation of waste paper pulp, which efficiently promotes the separation of impurities in the waste paper pulp processing step.

近年の古紙の再生処理の分野では、紙、インクの多様化によって再生に供される古紙の状態が悪くなってきており、付着性が強いインクを除去し難い、表面処理剤のコート分である灰分が多く白色度を上げ難い等々が、古紙を原料として紙を抄紙する場合の大きな問題になっている。   In the field of used paper recycling treatment in recent years, the condition of used paper used for recycling has become worse due to the diversification of paper and ink, and it is difficult to remove highly adherent ink, and it is a coat of surface treatment agent. The amount of ash content and difficulty in increasing the whiteness is a big problem when paper is made from waste paper.

換言すれば、古紙を原料として製品にするためには、問題となる強いインク、灰分を除去しなくては、きれいな紙を造ることは困難である。   In other words, in order to make waste paper as a raw material, it is difficult to produce clean paper unless strong ink and ash that are problematic are removed.

古紙は水と薬品を加えて高温で蒸すことにより溶かしてしまう方法、或いは加水された古紙を回転ブレードによって溶かしてしまう方法などにより離解される。その後に、ごみ等を除去してワイヤメッシュやワイヤスリットを付けてあるドラムにより脱水され、コンベヤによってニーダやディスパーザに送られ、ここでニーディングされて熟成タワーに溜められるか、又は脱水されたままで熟成タワーに溜められて熟成される。   Waste paper is disaggregated by the method of melting by adding water and chemicals and steaming at a high temperature, or the method of melting the used waste paper by a rotating blade. After that, debris is removed and dewatered by a drum with a wire mesh or wire slit, sent to a kneader or disperser by a conveyor, where it is kneaded and stored in an aging tower, or left dehydrated. Aged in the aging tower.

離解以後においては、最近では図２に示すように、エキスト、ディスクエキスト、サンクションフィルタウオッシャ等の濃縮洗浄機１により洗浄又は濃縮された後に、バキュームフィルタ、ツインシックナ、シリンダプレス、ダブルワイヤ等の網系の脱水機２により脱水され、次いでコンベヤによりニーダ３に送られて、ここでインク粒子を剥離して除去し、引き続き熟成タワー４により熟成されて、白色度が上げられる。ただし、この熟成タワー４については、網系の脱水機２の直後に置かれることもある。   After the disaggregation, recently, as shown in FIG. 2, after being washed or concentrated by a concentration washing machine 1 such as an extract, a disk extract or a suction filter washer, a network such as a vacuum filter, a twin thickener, a cylinder press, or a double wire is used. The ink is dehydrated by the system dehydrator 2 and then sent to the kneader 3 by the conveyor, where the ink particles are peeled off and removed, followed by aging by the aging tower 4 to increase the whiteness. However, the aging tower 4 may be placed immediately after the net-type dehydrator 2.

しかし、このような網系の脱水機２によって、濃度２０％内外に脱水されただけでは、パルプ濃度が低いためにニーディング効果が少ない。従って、インク等の機械的分離除去が困難であり、添加する化学薬品についても離解パルプへの吸着率が低く、化学薬品を多く添加しないと効果がなく、大量の化学薬品を必要とする。   However, if the net-type dehydrator 2 is only dewatered in and out of a concentration of 20%, the kneading effect is small because the pulp concentration is low. Therefore, mechanical separation and removal of ink or the like is difficult, and the chemicals to be added have a low adsorption rate to the disaggregated pulp. If a large amount of chemicals are not added, there is no effect, and a large amount of chemicals is required.

本発明の目的は、上述の問題点を解決し、古紙パルプを十分に脱水し、ニーディング効果を確実なものにし、使用する化学薬品を節約して、強いインク等の除去を可能にする古紙パルプの不純物分離促進方法を提供することにある。   The object of the present invention is to solve the above-mentioned problems, sufficiently dewatering waste paper pulp, ensuring a kneading effect, saving chemicals used, and enabling removal of strong ink and the like. It is to provide a method for promoting impurity separation of pulp.

上記目的を達成するための本発明に係る古紙パルプの不純物分離促進方法の技術的特徴は、離解パルプを濃縮過程において６〜７％程度の濃度に濃縮した後に、低濃度脱水機により濃度２０％内外に脱水する第１段脱水工程と、更に高濃度脱水機により濃度３０％程度に脱水する第２段脱水工程と、該第２段脱水工程で脱水した前記パルプに化学薬品を投入して化学反応処理を行う化学反応処理工程と、前記パルプを熟成させる熟成工程とを備えたことにある。   The technical feature of the method for promoting impurity separation of waste paper pulp according to the present invention for achieving the above object is that after the disaggregated pulp is concentrated to a concentration of about 6 to 7% in the concentration process, the concentration is 20% by a low concentration dehydrator. A first-stage dewatering process that dehydrates inside and outside, a second-stage dewatering process that dehydrates to a concentration of about 30% with a high-concentration dehydrator, and chemicals that are added to the pulp dehydrated in the second-stage dewatering process. There is a chemical reaction treatment step for performing a reaction treatment and an aging step for aging the pulp.

本願発明にかかる古紙パルプの不純物分離促進方法によれば、古紙パルプを第１段脱水工程により濃度を或る程度に脱水し、重ねて第２段脱水工程の高濃度脱水機により更に脱水するので、的確に高脱水パルプが得られてパルプ濃度を格段に高くでき、大きなニーディング効果が望める。   According to the method for promoting impurity separation of waste paper pulp according to the present invention, waste paper pulp is dehydrated to a certain degree by the first stage dewatering step, and further dehydrated by the high concentration dehydrator in the second stage dewatering step. Highly dehydrated pulp can be obtained accurately and the pulp concentration can be remarkably increased, and a great kneading effect can be expected.

本願発明を図示の実施例に基づいて詳細に説明する。
図１は本発明の古紙パルプの処理工程に適用した不純物分離促進方法の実施例を示している。古紙等を蒸煮釜１１において蒸煮し、どろどろになった古紙の離解パルプを洗浄又は濃縮し、パルパ１２により大きなごみ等を除去すると共に、濃度つまり含水率を６〜７％程度濃縮して、第１段脱水工程の網系脱水機１３に送る。 The present invention will be described in detail based on the embodiments shown in the drawings.
FIG. 1 shows an embodiment of an impurity separation promoting method applied to the waste paper pulp processing step of the present invention. The used paper is cooked in the steaming pot 11, and the sludge disintegrated pulp is washed or concentrated, and the pulp 12 removes large debris etc., and the concentration, that is, the water content is concentrated by about 6 to 7%. This is sent to the network dehydrator 13 in the first stage dewatering process.

網系脱水機１３はバキュームフィルタ、ツインシックナ、シリンダプレス、ダブルワイヤ等から成り、濃縮パルプを２０％程度にまで脱水して、スクリーンにより金物や小さなごみを取り除き、コンベヤにより第２段脱水工程のスクリュ系脱水機１４に送る。   The net-type dehydrator 13 comprises a vacuum filter, twin thickener, cylinder press, double wire, etc., dehydrates the concentrated pulp to about 20%, removes hardware and small debris with a screen, and performs the second stage dewatering process with a conveyor. Send to screw dehydrator 14.

スクリュ系脱水機１４はスクリュプレスから成り、先の２０％程度の脱水を更に３０％にまで高めてニーダ（ディスパーザ）１５に送る。ニーダ１５は３０％程度に脱水パルプを化学薬品を加えてニーディングし、付着性の強いインク、灰分等の不純物を引き剥がして除去し、次の熟成タワー１６に送る。熟成タワー１６では、ニーディングされたパルプを引き続き熟成させて次亜塩素酸ナトリウムなどの化学薬品を加えて白色度を上げ、次工程へと送る。   The screw-type dehydrator 14 comprises a screw press, and further increases the previous dehydration of about 20% to 30% and sends it to a kneader (disperser) 15. The kneader 15 kneads the dehydrated pulp by adding chemicals to about 30%, peels off and removes impurities such as highly adhesive ink and ash, and sends them to the next aging tower 16. In the aging tower 16, the kneaded pulp is continuously ripened, and chemicals such as sodium hypochlorite are added to increase the whiteness, which is sent to the next process.

このような工程を経ることにより、強いインク、灰分等の剥離効果を大きく促進させることができ、不純物の除去を大幅に改善でき、また化学薬品を添加して処理するにもパルプの水分が少ないので、パルプへの薬品の吸着率が高くなり、薬品の効きの良さが向上して、化学薬品の反応時間が速くなり、その使用量を節約でき経済性を改善できる。   By going through these steps, it is possible to greatly promote the peeling effect of strong ink, ash, etc., greatly improve the removal of impurities, and there is little moisture in the pulp even when processing with chemicals added Therefore, the rate of chemical adsorption to the pulp is increased, the effectiveness of the chemical is improved, the reaction time of the chemical is increased, the amount used can be saved, and the economic efficiency can be improved.

しかも、パルプ内の灰分等が抜け易くなり、洗浄水が不要となるために排水に負担が少なくて済む。   In addition, the ash and the like in the pulp can be easily removed, and no washing water is required, so that the burden on the drainage can be reduced.

また、第１段脱水工程の網系脱水機１３の前に濃縮洗浄機を配して、６〜７％程度の濃度に洗浄又は濃縮しているので、離解パルプの濃度が２％程度の低濃度のものであったとしても、その濃縮に支障はなく、第２段脱水工程にスクリュ系脱水機１４を使用してもその脱水の歩留に悪影響がでるようなことはない。   In addition, a concentration washer is disposed in front of the net-type dehydrator 13 in the first stage dewatering step, and the concentration or concentration is about 6 to 7%. Even if it has a concentration, there is no hindrance to the concentration, and even if the screw-type dehydrator 14 is used in the second stage dewatering process, the dewatering yield is not adversely affected.

加えて、第２段脱水工程に機械的強度の大きいスクリュ系脱水機１４を用いているので、脱水度を３０％程度にしても機械的に支障が生ずるようなことはなく、このように脱水度を３０％にしても通常のメンテナンスで足り、機械の維持費が嵩むようなことはない。   In addition, since the screw-type dehydrator 14 having high mechanical strength is used in the second stage dewatering step, there is no mechanical problem even if the dewatering degree is about 30%. Even if the degree is 30%, normal maintenance is sufficient, and the maintenance cost of the machine does not increase.

実施例の構成図である。It is a block diagram of an Example. 従来例の工程図である。It is process drawing of a prior art example.

符号の説明Explanation of symbols

１１ 蒸煮釜
１２ パルパ
１３ 第１段脱水工程の網系脱水機
１４ 第２段脱水工程のスクリュ系脱水機
１５ ニーダ
１６ 熟成タワー DESCRIPTION OF SYMBOLS 11 Steamer 12 Pulpa 13 Net system dehydrator of the 1st stage dehydration process 14 Screw system dehydrator of the 2nd stage dehydration process 15 Kneader 16 Aging tower

Claims (2)

離解パルプを濃縮過程において６〜７％程度の濃度に濃縮した後に、低濃度脱水機により濃度２０％内外に脱水する第１段脱水工程と、更に高濃度脱水機により濃度３０％程度に脱水する第２段脱水工程と、該第２段脱水工程で脱水した前記パルプに化学薬品を投入して化学反応処理を行う化学反応処理工程と、前記パルプを熟成させる熟成工程とを備えたことを特徴とする古紙パルプの不純物分離促進方法。   After the disintegrated pulp is concentrated to a concentration of about 6 to 7% in the concentration process, it is dewatered to a concentration of about 30% by a high concentration dehydrator, and a first stage dewatering step of dehydrating to a concentration of about 20% with a low concentration dehydrator. A second-stage dehydration step, a chemical reaction treatment step in which a chemical is added to the pulp dehydrated in the second-stage dehydration step, and a ripening step for aging the pulp. A method for promoting the separation of impurities in waste paper pulp. 前記第２段脱水工程にスクリュプレスを用いる請求項１に記載の古紙パルプの不純物分離促進方法。   The method for promoting impurity separation of waste paper pulp according to claim 1, wherein a screw press is used in the second stage dewatering step.
JP2004333253A 2004-11-17 2004-11-17 Method for accelerating separation of impurity in waste paper pulp Pending JP2006144148A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04214483A (en) * 1990-01-19 1992-08-05 Ciba Geigy Ag Stabilization of polyamide fiber dyed material
JPH0523262A (en) * 1991-07-25 1993-02-02 Oji Paper Co Ltd Softened pulp and tissue paper made from softened pulp
JPH05125679A (en) * 1991-10-30 1993-05-21 Mitsubishi Paper Mills Ltd Method for reclaiming pulp from magnetic recording old paper
JPH08309228A (en) * 1995-05-14 1996-11-26 Daizen:Kk Concentrating washer
JPH11158789A (en) * 1997-12-01 1999-06-15 Mitsubishi Gas Chem Co Inc Bleaching of woodfree or mechanical waste paper pulp in high whiteness degree
JP2000515205A (en) * 1996-07-25 2000-11-14 セルウッド マシナリー エービー In particular, a method and apparatus for bleaching wood pulp containing waste paper
JP2003171889A (en) * 2001-12-11 2003-06-20 Mitsubishi Paper Mills Ltd Regenerated pulp using magnetic recording waste paper as raw material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04214483A (en) * 1990-01-19 1992-08-05 Ciba Geigy Ag Stabilization of polyamide fiber dyed material
JPH0523262A (en) * 1991-07-25 1993-02-02 Oji Paper Co Ltd Softened pulp and tissue paper made from softened pulp
JPH05125679A (en) * 1991-10-30 1993-05-21 Mitsubishi Paper Mills Ltd Method for reclaiming pulp from magnetic recording old paper
JPH08309228A (en) * 1995-05-14 1996-11-26 Daizen:Kk Concentrating washer
JP2000515205A (en) * 1996-07-25 2000-11-14 セルウッド マシナリー エービー In particular, a method and apparatus for bleaching wood pulp containing waste paper
JPH11158789A (en) * 1997-12-01 1999-06-15 Mitsubishi Gas Chem Co Inc Bleaching of woodfree or mechanical waste paper pulp in high whiteness degree
JP2003171889A (en) * 2001-12-11 2003-06-20 Mitsubishi Paper Mills Ltd Regenerated pulp using magnetic recording waste paper as raw material

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