Medium-consistency beating feeding device and feeding method for stabilizing beating strength

Abstract

The invention discloses a medium-concentration pulping feeding device with stable pulping intensity and a feeding method thereof. The medium-concentration pulping feeding device comprises a flow rate control system, a pulp inlet pipe, a buffer pipe and an overflow pipe, wherein the feeding end of the buffer pipe is connected with a discharging opening of a medium-concentration pulp pump through the pulp inlet pipe, the discharging end of the buffer pipe is connected with a feeding opening of a medium-concentration disc grinding machine, the feeding end of the buffer pipe is an expansion opening with the inner diameter changed from the small size to great size, the discharging end of the buffer pipe is a contraction opening with the inner diameter changed from the great size to small size, an included angle between the skew wall of the expansion opening of the feeding end and a center shaft of the buffer pipe is 15 degrees to 45 degrees, and an included angle between the skew wall of the contraction opening of the discharging end and the center shaft of the buffer pipe is 15 degrees to 45 degrees. According to the method, the pulping intensity is calculated in real time through the flow rate control system according to the work power of the medium-concentration disc grinding machine and the real-time detected paper pulp flow rate passing through the disc grinding machine, and the ratio value of the real-time pulping intensity to the set pulping intensity is controlled to be 95 to 105 percent. The medium-concentration pulping feeding device and the feeding method have the advantages that the disc grinding machine is enabled to carry out pulping at stable pulping intensity, and the stable pulping effect is obtained.

Description

technical field [0001] The invention relates to a medium-consistency beating feeding device, in particular to a medium-consistency beating feeding device with stable beating strength and a feeding method thereof, belonging to the technical field of pulping and papermaking. Background technique [0002] The grinding zone is formed between the movable grinding disc and the fixed grinding disc of the disc refiner used in beating. When the pulp fibers pass through the grinding zone, they are subjected to mechanical forces such as extrusion and shearing, and the fiber morphology changes to obtain the required characteristics to meet Requirements for the papermaking performance of the paper machine and the performance of the paper produced. The ideal beating process is to subject the fiber raw materials to a constant beating intensity during the beating process, so as to obtain uniform and stable pulp fibers and ensure the stable physical properties of the paper to be made. When ...

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Problems solved by technology

In addition, during the medium consistency beating process, the power of the disc refiner will also fluctuate

The above factors make the beating intensity of the pulp fluctuate when it passes through the disc refiner, which affects the stability of the beating effect.

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