Circumferential grinding head, multi-screw extrusion kneading machine, and pulping method

Abstract

The invention relates to a circumferential grinding head, a multi-screw extrusion kneader and a pulping method. The circumferential grinding head adopts a new circumferential grinding mode, so that fibers can pass through a gap between moving grinding teeth in the circumferential direction of a moving grinding head and static grinding teeth inwards arranged in the circumferential direction of a lining tile. Under the condition that the length of the fibers is not influenced, the quantity of beam-like fibers in slurry can be greatly reduced, the fibers are dissociated in a high-efficient mode, and therefore the beating degree can be increased (the beating degree is increased by 3-8 degrees in the first section of pulping) and the quality of the slurry cannot be changed. The multi-screw extrusion kneader (including a double-screw extrusion kneader) adopts the circumferential grinding head to replace the traditional disc mill. Under the condition that the power equipment and the equipment cost are not increased, the content of the beam-like fibers can be effectively reduced, and the fiber resolution rate is over 70 percent. Therefore, the subsequent process of a high-consistency refiner is not needed, and the equipment cost and the energy consumption are saved.

Description

technical field [0001] The invention relates to a circumferential grinding head, in particular to a circumferential grinding head used in the pulping industry, a twin-screw extruding kneading machine and a pulping method using the circumferential grinding head. Background technique [0002] Multi-screw extrusion kneading machine, such as twin-screw extrusion kneading machine, originated from the twin-screw extruder in the plastics and food industry, is a high-yield product developed by using the engineering principle of plastic extrusion and modern paper pulping theory. , multi-functional, energy-saving clean mechanical pulping equipment, mainly used in the preparation of mechanical pulp and chemical mechanical pulp in the paper industry. It uses two parallel, interlocking and co-rotating screws and a screw element with a special structure to dynamically squeeze the fiber slurry while being conveyed, relying on the kneading between the fibers under high concentration and hig...

AI Technical Summary

Problems solved by technology

However, the equipment of the high-consistency refiner is complicated, the cost is high, and the power consumption is large, which is not conducive to energy saving and increases the cost.

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