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Design and system developments of pulping and paper making equipment for reduction of energy consumption

Abstract

Due to unprecedented price rise of energy, acute shortages and uncertainties in securing new and reliable energy sources, continuous technological developments have been taking place in equipment and system design in the field of pulp and paper industry. The possibility of energy reduction in areas of pulping, bleaching and cleaning of pulp, black liquor evaporation, approach flow system and drying of paper are analyzed. Specific energy consumption in terms of both heat and electricity can be considerably reduced by adopting continuous pulping methods, incorporating new concepts of counter-current impregnation, cooking high heat diffusion washing and displacement bleaching. Use of cleaners based on improved design can reduce electric energy use considerably by cleaning pulp at higher consistency and at reduced reject rates without impairing cleaning efficiency. Pre-evaporation of spent liquor in vapor recompression evaporators and use of falling film evaporation for scale forming black liquors can reduce steam demand in evaporation. Specific steam demand in paper drying can be reduced by 6 to 10% using thermo-rings or by modifications of dryer inner surface. Effects of energy consumption by integration of pulp and paper mills and by implementation of effluent treatment program are indicated.
Authors:
Publication Date:
Mar 15, 1980
Product Type:
Conference
Report Number:
CONF-800381-
Reference Number:
EDB-80-089861
Resource Relation:
Conference: Indian Pulp and Paper Technical Association annual general meeting and seminar on utilization of agricultural residues for paper and board and capacity utilisation and energy conservation, New Delhi (India), 29-30 Mar 1980; Related Information: In: Annual general meeting and seminar on (I) Utilization of agricultural residues for paper and board; (II) Capacity utilization and energy conservation.
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PAPER INDUSTRY; ENERGY CONSERVATION; DESIGN; INDIA; MACHINERY; OPERATION; ASIA; DEVELOPING COUNTRIES; INDUSTRY; WOOD PRODUCTS INDUSTRY; 320303* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Equipment & Processes
OSTI ID:
8498979
Research Organizations:
Hindustan Paper Corp. Ltd., Calcutta (India)
Country of Origin:
India
Language:
English
Submitting Site:
TIC
Size:
Pages: 24p, Paper 6
Announcement Date:
Aug 01, 1980

Citation Formats

Panda, A. Design and system developments of pulping and paper making equipment for reduction of energy consumption. India: N. p., 1980. Web.
Panda, A. Design and system developments of pulping and paper making equipment for reduction of energy consumption. India.
Panda, A. 1980. "Design and system developments of pulping and paper making equipment for reduction of energy consumption." India.
@misc{etde_8498979,
title = {Design and system developments of pulping and paper making equipment for reduction of energy consumption}
author = {Panda, A.}
abstractNote = {Due to unprecedented price rise of energy, acute shortages and uncertainties in securing new and reliable energy sources, continuous technological developments have been taking place in equipment and system design in the field of pulp and paper industry. The possibility of energy reduction in areas of pulping, bleaching and cleaning of pulp, black liquor evaporation, approach flow system and drying of paper are analyzed. Specific energy consumption in terms of both heat and electricity can be considerably reduced by adopting continuous pulping methods, incorporating new concepts of counter-current impregnation, cooking high heat diffusion washing and displacement bleaching. Use of cleaners based on improved design can reduce electric energy use considerably by cleaning pulp at higher consistency and at reduced reject rates without impairing cleaning efficiency. Pre-evaporation of spent liquor in vapor recompression evaporators and use of falling film evaporation for scale forming black liquors can reduce steam demand in evaporation. Specific steam demand in paper drying can be reduced by 6 to 10% using thermo-rings or by modifications of dryer inner surface. Effects of energy consumption by integration of pulp and paper mills and by implementation of effluent treatment program are indicated.}
place = {India}
year = {1980}
month = {Mar}
}