Vertical hydrapulper with drum groove body and spiral backflow plates

Abstract

The invention discloses a vertical hydrapulper with a drum groove body and spiral backflow plates. The vertical hydrapulper comprises the groove body and a rotor installed at the bottom of the groove body. The groove body is in a drum shape and comprises an upper ellipsoid part and a lower inverted cone part. The inner wall of the groove body is provided with the backflow plates arranged in an ascending spiral line mode. The rotating direction of the backflow plates is opposite to that of the rotor. Due to the groove body structure, the vertical hydrapulper has the good circulating, stirring, shearing and gathering functions on paper in the pulping process, and has the advantages of being small in energy loss, high in pulping efficiency, stable in operation and the like.

Description

technical field [0001] The invention relates to a pulper for mechanically processing papermaking fiber raw materials, in particular to a vertical hydraulic pulper with a drum groove body and a spiral backflow plate. Background technique [0002] The basic function of the hydropulper is to break pulp board, waste paper (cardboard), etc. into pulp under the condition of soaking in water through hydraulic and mechanical forces. The purpose of shredding is to disintegrate pulp board or waste paper (cardboard) into pulp fiber suspension, even if the fiber layer that was originally interwoven into paper sheets is dissociated into single fibers or fiber bundles to the greatest extent while maintaining The original shape and strength of the fiber. The crushing operation can separate heavy and large impurities from fibers. When processing waste paper that needs to be deinked, add a certain amount of deinking chemicals and heat it with steam to separate the fibers from the ink. [...

AI Technical Summary

Problems solved by technology

[0007] 2. Pulping

[0010] 2. In terms of the setting of the slurry baffle, there is a design to set a vertical △-shaped baffle on the inner wall of the tank, which can block the circumferential flow of the slurry, and only rely on the △-shaped baffle to play part of the loose material and partially The material is guided horizontally to the central area, and cannot be guided to the bottom of the center, so that the material is easy to float on the surface of the pulp tank and reduce the contact with the rotor, which eventually leads to low pulping efficiency

Its shortcoming is that the deflectors arranged along the vortex movement direction of the paper material only play the role of diversion and upflow for the paper material, but cannot directly generate power to make the paper material gather to the bottom of the central groove, and the pulping efficiency is high. low

[0012] 4. In terms of the overall structure of the tank, the tank wall of the traditional hydropulper is perpendicular to the bottom of the tank. This structure makes the volume of the hydraulic pulper fully utilized; And turbulence, just do a single horizontal vortex movement, the friction between the fibers is reduced, thus affecting the crushing efficiency

The disadvantage is that this asymmetric structure makes the tank body stressed unevenly, resulting in vibration and noise; in addition, the rotor (including the bearing) is asymmetrically stressed, which causes easy damage to equipment components and increases maintenance costs

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