Process for removing and washing dregs from green liquor in a kraft pulp mill

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专利权人:

KVAERNER PULPING TECHNOLOGIES AB

发明人:

ANGEVINE, PETER A.

申请号：

US19940260327

公开号：

US5705031(A)

申请日:

1994.06.15

申请国别(地区):

美国

年份:

1998

代理人:

摘要：

In a kraft pulp mill, a process and apparatus for removing and washing dregs from green liquor so that the pH of the dregs is below "hazardous waste" levels. Specifically, green liquor clarifier underflow is filtered using a simple non-precoat cassette filter to form a first dregs cake. The dregs cake is diluted, preferably with water. The diluted dregs cake is then filtered in a precoat dregs filter to produce a dregs cake that is at least 50% solid and has a pH of about 12.0 or less.

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