FIELD: process engineering.
SUBSTANCE: proposed process comprises the steps that follow. Thin 6 mm deep (maximum) chips are fed into bin. White (boiling) lye is added thereto or in chits transfer tube extending from said bin to continuous boiling digester top inlet. Medium-pressure steam or other heated fluid is forced to digester top area to up the boiling temperature to at least 130°C. Chips are boiled in digester downstream without extraction from or addition to digester boiling area of lye. Flushing fluid is forced to digester bottom area. Flushing fluid is discharged from digester bottom area through the sieve. Digested thin chips are discharged from boiler bottom area.
EFFECT: perfected method.
17 cl, 1 dwg
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