Pressure stabilizing method and its device for beating of disc mill

Abstract

The present invention provides a kind of beating pressure stabilizing device for disc refiner. The beating pressure stabilizing device set in front of the disc refiner is connected to the inlet of the disc refiner and is constituted by pulp inlet pipe, pressure stabilizing tower, overflow pipe, control valve, and pulp outlet pipe. The beating pressure stabilizing device has the pressure controlled via the height inside the pressure stabilizing tower or the opening of the overflow port. The present invention makes the disc refiner operate in relatively stable flow rate and pressure conditions to obtain stable beating quality and reduced power consumption. The present invention has production cost much lower than available dynamic control system.

Description

technical field [0001] The invention relates to a papermaking beating technology, in particular to a disc refiner beating and pressure stabilizing method and a device thereof. Background technique [0002] Medium-consistency beating has been more and more widely used in China's paper industry in recent years; since pulp is a suspension, when the concentration increases, its flow stability is easily disturbed; in addition, due to various reasons, in beating In the working section, the flow and pressure of the slurry will fluctuate. When the slurry pump is used to supply the slurry, the slurry pump cannot reduce this fluctuation, and even amplifies this fluctuation. In this case, the disc refiner works in an unstable state. Under the condition of flow rate and pressure, beating under the condition of medium consistency, the pressure obviously affects the beating effect, because under the condition of medium concentration, the friction between fibers and fiber flocs contributes...

AI Technical Summary

Problems solved by technology

[0002] Medium-consistency beating has been more and more widely used in China's paper industry in recent years; since pulp is a suspension, when the concentration increases, its flow stability is easily disturbed; in addition, due to various reasons, in beating In the working section, the flow and pressure of the slurry will fluctuate. When the slurry pump is used to supply the slurry, the slurry pump cannot reduce this fluctuation, and even amplifies this fluctuation. In this case, the disc refiner works in an unstable state. Under the condition of flow rate and pressure, beating under the condition of medium consistency, the pressure obviously affects the beating effect, because under the condition of medium concentration, the friction between fibers and fiber flocs contributes more to the beating effect, and the shearing effect of the knife on the fiber increases. The cutting effect is relatively weakened, and the beating pressure directly affects the friction effect, so the instability of the pressure directly affects the stability of the beating quality, and in this fluctuation process, it causes a lot of waste of energy consumption; another pulp supply method It is to use the pumping function of the disc refiner (the pumping capacity is determined by the shape and inclination angle of the grinding teeth), through the self-priming device, self-priming slurry supply, this slurry supply method is relatively stable, but it needs to be pumped before the disc refiner. There is a feeding tower, when the slurry level and flow in the tower fluctuate, the same problem as the previous method will also occur

Images