Unformatted text preview: es sometimes used as dilution water, in brown stock washing, etc. Non-condensable gases often diverted to the lime kiln for combustion
6 Knotter Screen
Knotter- coarse screening equipment Rejects portion (knots) not sufficiently delignified to liberate Rejects in kraft pulping are repulped Shorter fibers (hardwoods) screen more easily than softwoods Pulp screened prior to washing for improved washing efficiency After washing, pulps screened to remove shivers, dirt, contaminants
The cooked pulp is separated from the residual liquor in a carefully controlled process known as brown stock washing. The most co...
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- Fall '08
- lignin, Pulp and paper industry, Papermaking, Kraft process, Brown Stock Washing