Title:
【発明の名称】精砕製紙原料の製造における制御方法および装置
Document Type and Number:
Japanese Patent JPH0665791
Kind Code:
B2
Abstract:
PCT No. PCT/FI88/00118 Sec. 371 Date Jan. 10, 1990 Sec. 102(e) Date Jan. 10, 1990 PCT Filed Jul. 15, 1988 PCT Pub. No. WO89/00624 PCT Pub. Date Jan. 26, 1989.Method and an apparatus for controlling the production of thermomechanical pulp meter chips by metering elements (9, 10) into a feed chest (2), and by feed elements (3, 7) connected to the feed chest feeds chips for refinement between thermomechanical pulp refining discs (5). Water is added to the chips prior to feeding the chips between the discs (5). Moisture content of the thermomechanical pulp is measured after the thermomechanical pulp refiner at least in a semicontinuous fashion by at least one measurement device (21, 22, 23, 24) operating on-line, and on the basis of measured moisture content, the quantity of chips and water to be metered is controlled so as to regulate the moisture content to a desired level of having a constant value by, e.g., increasing the volume of metered chips and simultaneously decreasing the quantity of fed water for an increasing trend of moisture content, and correspondingly, applying an opposite strategy to counter a decreasing trend of moisture content. The implementation provides for a consistent quality of thermomechanical pulp.
Inventors:
PIIETSUINEN PERUTEI
SABONJIOSHI ASURAKU
SABONJIOSHI ASURAKU
Application Number:
JP50621288A
Publication Date:
August 24, 1994
Filing Date:
July 15, 1988
Export Citation:
Assignee:
PIIETSUINEN PERUTEI
SABONJIOSHI ASURAKU
SABONJIOSHI ASURAKU
International Classes:
B02C7/00; D21B1/14; B02C7/11; D21D1/00; D21D1/02; D21D1/20; D21F1/04; G05D11/00; D21D; (IPC1-7): D21B1/14; B02C7/11; D21D1/20
Domestic Patent References:
| JP5932592B2 |
Other References:
【文献】米国特許2437715(US,A)
【文献】国際公開86106770(WO,A)
【文献】国際公開86106770(WO,A)
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)
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