Improved pulper vertical pipe

Abstract

The invention relates to an improved standpipe of a refiner, which comprises a hollow cylindrical standpipe body, the upper end of the standpipe body is connected with an upper flange connected with the refiner, and the lower end of the standpipe body is connected with a screw feeder. The lower flange connected to the feeder, the joints between the upper flange and the lower flange and the standpipe body are provided with gaskets, the inner wall of the riser pipe is provided with interlayers, and a spiral arrangement is arranged in the interlayers. The hot water pipe is used for passing in hot water, and the upper end and the lower end of the hot water pipe are respectively provided with a water inlet and a water outlet. In the present invention, a hot water circulation system is arranged on the inner wall of the standpipe of the refiner, and the standpipe of the refiner is insulated with hot water, which prevents the formation of condensed water due to the temperature difference between the inside and outside, thereby solving the problem of fiber falling and affecting the papermaking process.

Description

technical field [0001] The invention relates to the field of papermaking machinery, in particular to an improved standpipe of a refiner. Background technique [0002] The refiner is used to divide, cut, knead and rub the fiber raw material to make a slurry. The standpipe of the refiner is vertically arranged between the refiner and the screw feeder, and the slurry with a temperature of about 80 degrees Celsius enters the screw feeder through the standpipe of the refiner under the action of gravity. Since the temperature in the standpipe of the refiner is much higher than the working environment temperature, the temperature difference between the inside and outside of the standpipe of the paper refiner is large, and a large amount of condensed water will be formed on the inner wall of the standpipe of the refiner, and the fibers splashed during the falling of the slurry will adhere On the inner wall of the refiner standpipe, when the slurry accumulates enough weight to fall ...

AI Technical Summary

Problems solved by technology

Since the temperature in the standpipe of the refiner is much higher than the working environment temperature, the temperature difference between the inside and outside of the standpipe of the paper refiner is large, and a large amount of condensed water will be formed on the inner wall of the standpipe of the refiner, and the fibers splashed during the falling of the slurry will adhere On the inner wall of the refiner standpipe, when the slurry accumulates enough weight on the inner wall of the refiner standpipe, it will fall and accumulate to block the equipment and affect the papermaking process

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