Medium concentration hydraulic double disc stuff grinder

Abstract

The invention discloses a medium concentration hydraulic double disc stuff grinder, comprising a hydraulic adjusting unit and a medium concentration double disc stuff grinder body. The hydraulic adjusting unit consists of a hydraulic cylinder, an electromagnetic direction valve, a pressure retaining valve, a hydraulic pump, an oil pump motor and an oil tank connected orderly by pipelines. The oil tank is further connected with a cooler, a pressure adjusting valve and a pipeline of a pressure gauge; the medium concentration double disc stuff grinder body consists of a double shell and a shell cover, a coupler, a motor, a bearing body suspension and a bearing body, a shaft, a left fixed disc base and left and right fixed discs, left and right rotary discs and a rotary disc base. The hydraulic cylinder is fixed on the shell cover. One end of the piston rod is fixed on the left fixed disc base while the other end is provided with a mechanism limiting fine-adjusting nut. The left fixed disc is fixed on the left fixed disc base and the right fixed disc is fixed on the shell. The left and right rotary discs are fixed respectively at both sides of the rotary disc base. Tangential stock inlets are arranged on the left fixed disc base and the shell. The shell is provided with a stock outlet. The invention adjusts the definitely proportional pressure of the millstone which feeds and discharges through the pressure retaining valve to pulp in medium concentration, thereby improving the pulping quality and efficiency thereof.

Description

Technical field [0001] The invention relates to a continuous grinding and beating equipment applied to the pulp and paper industry, in particular to a refining equipment for hydraulically adjusting the beating pressure, that is, a medium-consistency hydraulic double-disc refiner. Background technique [0002] In the papermaking process, beating is a key link, known as "seven-point beating and three-point papermaking". The beating method is divided into low, medium and high concentration according to the beating concentration. Low-concentration beating mainly relies on the cutting of the fiber by the grinding disc and friction beating. It mainly cuts the fiber and is supplemented by the splitting and brooming. It is suitable for long fiber logs. Pulp beating; medium and high-consistency beating mainly relies on the friction between the fiber and the fiber to make the fiber split and cut less. It is suitable for beating short fiber grass pulp and secondary fiber waste paper pulp. ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect that the existing double-disc mill and conical mill which are adjusted by the worm and gear to advance and retreat are only suitable for 3-6% concentration and low-consistency beating and the shortcomings of low comprehensive refining efficiency of medium- and high-consistency disc mills, the invention provides A continuous refining or beating equipment used in the pulp and paper industry, that is, a medium-concentration hydraulic double-disc refiner, which is suitable for a beating concentration of 6-12%, and the beating specific pressure is adjusted by hydraulic pressure

Images