LOW-RESIDENT HIGH-TEMPERATURE HIGH-SPEED CHIP REFINING

• Main Author: SABOURIN, MARC J
• Format: Patent
• Language: English; Korean
• Published: 15.09.1999
• Edition: 6
• Subjects: APPARATUS THEREFOR; BLASTING; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; OVENS; PAPER-MAKING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; RETORTS; TEXTILES; TRANSPORTING; TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE; WEAPONS

본발명은 1차 정제기, 바람직하게는 디스크 정제기(32)에서 리그노셀룰로스 함유 재료를 펄프로 정제하는 방법을 제공한다. 재료는 재료내 리그닌의 유리전이온도보다 더 큰 온도로 예열된다(20, 22, 24). 재료는 1분 이하, 바람직하게는 10내지 30초 범위의 시간 간격동안 이 온도에서 유지된다. 그 다음 가열된 재료는 정제기에서 고강도 정제를 행하여 펄프를 생성한다. 얻어진 펄프는 2차 정제(44)에서 큰 가요성을 제공하는 고품질을 가진다. 예열 체류간격은 총 비에너지 감소(도 2), 또는 강도성질의 증가(도 3 및 4)와 같은 상이한 목적을 강조하기 위해 조절될 수 있다. A method for refining lignocellulose-containing material into pulp in a disc refiner comprises preheating the material to a temperature greater than the glass transition temperature of lignin in the material, and holding this temperature for under one minute. The heated material is then subject to high speed refining in a disc refiner to produce pulp. The resulting pulp may then be subject to secondary refining steps to produce paper quality pulp. The preheat retention time is preferably in the range of 5-30 seconds, and can be controlled as a process variable to optimize energy savings, pulp strength, and optical qualities. High quality pulp can be obtained with preheat at high temperature and low retention time, followed by primary refining at disc speed of at least 2300 rpm.