公开(公告)号：US3898124A

公开(公告)日：1975-08-05

申请号：US46806174

申请日：1974-05-07

Applicant: ASEA AB

Inventor： OLSON TORBJORN

IPC: D21C3/22 ,  D21C7/12

CPC classification number: D21C3/228

Abstract: In a continuous digester which has a boiler with a rotatable bottom scraper and a chip and lye inflow at the top as well as a wash inflow into and a pulp outflow from the boiler, the concentration at the pulp outflow is measured and is used to control the rotation of the scraper so as to maintain a constant concentration of the outgoing pulp. A flow meter at the pulp outflow controls a throttle valve to regulate the outflow. The liquid in the top of the digester is measured and is used to control the devices which feed chips to the digester. Measurement of the pressure in the digester is used to control the flow of black liquor at the chip and lye inflow. The chips are fed in by a chip screw which in turn is fed by a segmental wheel, and the speeds of the chip screw and segmental wheel are maintained proportional to each other.

Abstract translation: 在具有可旋转底部刮板的锅炉和顶部的碎屑和碱液流入以及来自锅炉的洗涤流入和纸浆流出的连续蒸煮器中，测量纸浆流出物处的浓度并用于控制 刮刀的旋转以保持输出纸浆的恒定浓度。 纸浆出口处的流量计控制节流阀以调节流出。 测量消化器顶部的液体，并用于控制向消化器供料碎屑的装置。 测量蒸煮器中的压力用于控制芯片中黑液的流动和碱液流入。 芯片由切屑螺丝进给，切屑螺钉又由分段轮进给，切屑螺钉和分段轮的速度保持彼此成比例。