FIELD: textiles, paper.
SUBSTANCE: continuous cooking system comprises one generally vertically oriented vessel of atmospheric pressure, comprising an upper part and a lower part for receiving the ground cellulosic fibrous raw material. In the tank, the steaming, suspending, impregnation and digestion of fibrous material is carried out prior to discharge of boiled fibrous material from the lower part of the tank. The tank comprises: the measuring means for continuous feeding of the fibrous raw material in the tank from its upper part, the means for generating the first level of fibrous raw material in the tank, the means for creating a pressure in the upper part of the reservoir corresponding to the substantially atmospheric pressure in the range of +0.5 bar to -0.5 bar, means for creating a second liquid level in the tank, where the second level is located lower than the first level, to form this way the volume of the fibrous raw material in a pile over the total volume of liquid in the tank, the means for supplying the impregnating liquid to the first end of the first upper liquid volume in the total volume of the liquid, the means for feeding cooking liquor to the first end of the second lower liquid volume in the total volume of the liquid, the means for heating the cooking liquid in the second lower liquid volume in the total volume of the liquid, the means for removal the exhaust cooking liquor from the other end of the second lower liquid volume, the means for continuous discharge of the suspension of the boiled fibrous raw material from the area near the lower part of the tank and supply of the suspension in the systems subsequent after cooking. Atmospheric pressure tank, being a single tank for processing, where the fibrous raw material is impregnated and boiled to such an extent that the boiled fibrous raw material reaches the kappa number magnitude of 100.
EFFECT: continuous cooking system is greatly simplified by the use of a single vertical tank of atmospheric pressure, replacing conventional hopper for chips, a steaming reservoir, a gutter for chips, a high-pressure pump or flushing feeders, impregnating boilers and an upper separator.
11 cl, 5 dwg
