Lime sludge kiln
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United States of America Patent
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Feb 19, 1991
Issued Date -
N/A
app pub date -
Jun 18, 1990
filing date -
Oct 1, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A kiln for reclaiming quick lime for calcium carbonate sludge formed in the production of cooking liquors in a wood pulping process for the production of paper. The kiln provides increased output with lower energy input due to: measurement and control of oxygen content in the kiln; non-air mixing burner; castable refractory liner with tumbler ribs; a heat transferring chain system; and a variable speed exhaust fan and air flow control. The output of the kiln was increased by more than ten percent along with a forty-five percent improvement in energy efficiency at substantial cost reduction due to its efficient use of energy.
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