Title:
【発明の名称】環境への悪影響を最小限にしたパルプ製造装置
Document Type and Number:
Japanese Patent JPH09501992
Kind Code:
A
Abstract:
Effluents are minimized from a cellulose pulp mill having a recovery boiler by concentrating liquid effluents from the bleach plant and/or liquid spills from process streams, incinerating the concentrated effluents in the recovery boiler, removing particles present in the flue gases from the recovery boiler to produce an ash including salts containing potassium and chloride, and sulfur compounds, and removing the potassium and chloride from the ash while returning the sulfur containing compounds to the recovery loop, so as to balance the sulfur, chloride and potassium levels in the mill. The sulfur is typically returned directly to a stream of black liquor just before entry into the recovery boiler. Green liquor is produced from the melt, which preferably is treated to remove metals from it prior to caustization (e.g. by sedimentation and/or filtration), and prior to green liquor crystallization to produce sodium hydroxide.
Inventors:
Nikanen Tsuomo
Greenwood Brian F.
Gricksen Johann
Kisukira Erukki
Mattel Maki Esco
Philips Joseph Earl.
Richard Sen Jean Tea.
Riiham Rolf
Soderman Jarmo
Wicklund Karl Gee.
Greenwood Brian F.
Gricksen Johann
Kisukira Erukki
Mattel Maki Esco
Philips Joseph Earl.
Richard Sen Jean Tea.
Riiham Rolf
Soderman Jarmo
Wicklund Karl Gee.
Application Number:
JP50811495A
Publication Date:
February 25, 1997
Filing Date:
July 27, 1994
Export Citation:
Assignee:
Kamiya Incorporated
International Classes:
C01B7/01; C01D1/04; C01D3/04; C01D5/00; C01D7/00; D21C11/00; D21C11/06; D21C11/10; D21C11/12; (IPC1-7): D21C11/00
Attorney, Agent or Firm:
Shizuo Nakamura (2 outside)