Premium
Odour control from a kraft mill lime kiln using a spouted bed pre‐drier
Author(s) -
Prakash C. B.,
Mathur K. B.,
Murray F. E.
Publication year - 1974
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450520210
Subject(s) - lime , kraft paper , kraft process , calcination , kiln , pulp and paper industry , waste management , environmental science , materials science , metallurgy , chemistry , engineering , biochemistry , catalysis
A study has been conducted on the drying of lime mud and the concurrent oxidation of sodium sulphide in the mud. The experiments were done using a 6″ dia spouted bed of coarse inert particles (cement clinker and limestone; —4 + 10 mesh) with continuous feed of lime mud. A range of inlet gas temperatures, from 260°F to 400°F, was studied. A high degree of sulphide oxidation was achieved by this method over the entire temperature range, sulphide removal being in excess of 80% in all runs and as high as 98% in some. An analysis of the economic feasibility of drying lime mud in a spouted bed indicates that the process has good potential both as a method for drying lime mud prior to calcining and for control of hydrogen sulphide emission from lime kilns operated at kraft pulp mills.