KR850008114A - Bleaching Method of Wood Pulp - Google Patents

Bleaching Method of Wood Pulp Download PDF

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Publication number
KR850008114A
KR850008114A KR1019840002894A KR840002894A KR850008114A KR 850008114 A KR850008114 A KR 850008114A KR 1019840002894 A KR1019840002894 A KR 1019840002894A KR 840002894 A KR840002894 A KR 840002894A KR 850008114 A KR850008114 A KR 850008114A
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South Korea
Prior art keywords
dilution
oxygen
water
pulp
dilution water
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KR1019840002894A
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Korean (ko)
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KR920007531B1 (en
Inventor
제이 스타위키 로버어트
Original Assignee
래리 아아르 커세트
더 비이오우시이 그루우프 인코포레이팃드
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Priority to KR1019840002894A priority Critical patent/KR920007531B1/en
Publication of KR850008114A publication Critical patent/KR850008114A/en
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Publication of KR920007531B1 publication Critical patent/KR920007531B1/en

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    • 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
    • D21C9/10—Bleaching ; Apparatus therefor

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

내용 없음No content

Description

목재펄프의 표백방법Bleaching Method of Wood Pulp

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도, 4도, 5도는 본 발명의 공정에 의한 펄프표백장치의 부분 유통도임.1, 4 and 5 are partial flow charts of the pulp bleaching apparatus according to the process of the present invention.

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

11 : 추출탑, 15,35 : 세척기, 21,47 : 혼합기, 14 : 희석대, 26 : 노즐, 40 : 벤츄리, 46 : 펌프, 39 : 탱크.11: extraction tower, 15,35: washing machine, 21,47: mixer, 14: diluent, 26: nozzle, 40: venturi, 46: pump, 39: tank.

Claims (9)

펄프가 알카리 단계를 통해 하향으로 통과되고 그 상부는 주위조건에 노출되며 그 하부에 희석대를 갖는 펄프 표백 방법에 있어서, 알카리를 상기 단계에 첨가하고; 상기 단계에서 펄프의 온도를 약 40-80°C로 유지하며, 희석수를 상기 희석대에 도입하고 산소를 희석수에 도입하므로서 펄프의 흐름과 동시에 상기 단계로 도입되는 산소 첨가된 희석수로 상기 물에 산소를 적어도 부분적으로 용해한 다음, 상기 탑을 떠나기전 약 5.0분 이하의 평균 체류시간동안 상기 희석대에 펄프슬러리를 보유하는 단계로 구성된 펄프의 표백방법.A pulp bleaching method in which a pulp is passed downwardly through an alkali stage, the upper portion of which is exposed to ambient conditions and the dilution zone at the bottom thereof, wherein alkali is added to the step; The temperature of the pulp is maintained at about 40-80 ° C. in this step, the dilution water is introduced into the dilution zone and oxygen is introduced into the dilution water while the oxygenated dilution water is introduced into the step simultaneously with the flow of the pulp. At least partially dissolving oxygen in water and then retaining the pulp slurry in the dilution zone for an average residence time of about 5.0 minutes or less prior to leaving the tower. 제1항에 있어서, 세척기에서 상기 단계로부터 제거된 펄프 슬러리를 세척하는 단계와 세척기 여액을 상기 펄프로부터 분리하는 단계를 더 포함하는 것을 특징으로 하는 방법.The method of claim 1 further comprising washing the pulp slurry removed from the step in a washer and separating the washer filtrate from the pulp. 제2항에 있어서, 희석수를 도입하는 단계가 상기 세척기 여액을 상기 희석대로 재순환하는 것을 특징으로 하는 방법.3. The method of claim 2, wherein introducing dilution water recycles the washer filtrate to the dilution stage. 제1항에 있어서, 상기 희석대중 펄프 슬러리의 체류시간이 약 2.5-3.0분 이하인 것을 특징으로 하는 방법.The method of claim 1 wherein the residence time of the pulp slurry in the dilution mass is about 2.5-3.0 minutes or less. 제1항에 있어서, 희석수를 희석대에 도입하는 단계가 물을 희석대에 도입하기전 희석수를 벤츄리로 통과시킨 후 산소를 상기 벤츄리에 주입하여 상기 희석수와 혼합하고 희석수에 적어도 부분적으로 용해하는 단계를 포함하는 것을 특징으로 하는 방법.The method of claim 1 wherein the step of introducing dilution water into the dilution zone passes dilution water through the venturi before introducing the water into the dilution zone and injects oxygen into the venturi to mix with the dilution water and at least partially into the dilution water. Dissolving with a method comprising the. 제1항에 있어서, 산소를 희석수에 도입하는 단계가 산소가스를 상기 희석대에 도입하므로써 산소가스가 희석수에 적어도 용해되는 것을 특징으로 하는 방법.The method of claim 1 wherein introducing oxygen into the dilution water at least dissolves the oxygen gas into the dilution water by introducing oxygen gas into the dilution zone. 제1항에 있어서, 산소를 희석수에 도입하는 단계가 희석대로부터 측류를 제거하고, 산소를 상기 제거된 측류에 주입하므로써 산소가 상기 제거된 측류와 혼합되고 적어도 부분적으로 용해되며 산소첨가된 측류를 상기 희석대에 재순환하는 공정을 포함하는 것을 특징으로 하는 방법.The method of claim 1, wherein the step of introducing oxygen into the dilution water removes side flow from the dilution table and injects oxygen into the removed side stream so that oxygen is mixed with the removed side stream and at least partially dissolved and oxygenated side flow. Recycling the dilution zone to the dilution zone. 제1항에 있어서, 상기 제거된 펄프슬러리를 세척기로 통과시키는 단계를 더 포함하고 산소를 상기 희석수에 도입하는 단계가 세척기에 공급되기전 제거된 펄프 슬러리에 산소를 주입하는 것으로 구성된 것을 특징으로 하는 방법.The method of claim 1, further comprising passing the removed pulp slurry to the washer and introducing oxygen into the dilution water comprises injecting oxygen into the removed pulp slurry before feeding to the washer. How to. 제8항에 있어서, 펄프 슬러리로부터 세척기 여액을 분리하는 단계를 추가로 포함하고 희석수를 도입하는 단계가 세척기 여액을 상기 희석대로 재순환하는 것으로 구성된 것을 특징으로 하는 방법.The method of claim 8, further comprising separating the washer filtrate from the pulp slurry and wherein introducing the dilution water comprises recycling the washer filtrate to the dilution. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019840002894A 1984-05-26 1984-05-26 Method for bleaching wood pulp KR920007531B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019840002894A KR920007531B1 (en) 1984-05-26 1984-05-26 Method for bleaching wood pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019840002894A KR920007531B1 (en) 1984-05-26 1984-05-26 Method for bleaching wood pulp

Publications (2)

Publication Number Publication Date
KR850008114A true KR850008114A (en) 1985-12-13
KR920007531B1 KR920007531B1 (en) 1992-09-05

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KR1019840002894A KR920007531B1 (en) 1984-05-26 1984-05-26 Method for bleaching wood pulp

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