Novel two-stage and four-section grit removal process

Abstract

The invention relates to the field of cotton linter processing processes, and provides a novel two-stage and four-section grit removal process for solving the problems that in an existing cotton linter processing process, the content of hard impurities is large, and the loss of raw materials is large. The process is characterized in that tailings generated by a first-stage grit removal device and a second-stage grit removal device are collected in a centralized mode, are diluted and then enter a multi-section tailing grit removal device to be treated, and tailings generated by the multi-section tailing grit removal device are discharged into a microfiltration machine; the microfiltration machine collects the fiber-containing four-section tailings coming along with water, unrecyclable visible foreign matter is manually sorted out, and the tailings are weighed and measured and then are pumped into a spherical digester to be subjected to digestion retreatment along with raw materials. According to the process, hard impurities in raw material fibers are removed through a physical method, the dosage of chemicals in previous in-sphere digestion is reduced, process conditions are simplified, and it is guaranteed that the inherent quality of the raw materials is not influenced; the tailings of the grit removal devices are subjected to multi-level retreatment, so that the fiber loss is reduced, and the raw material yield is increased; the physical impurity removal effect of the grit removal process is improved, yellow bark and other dust on the surface of a cotton pulp plate are reduced, and product quality is improved.

Description

technical field [0001] The invention belongs to the field of cotton linter processing technology, in particular to a new two-stage four-stage sand removal process for cotton linters. Background technique [0002] Such as figure 1 Shown is the traditional cotton linters processing process, which has the following drawbacks: [0003] 1. After the raw cotton linters are cooked, there are still hard impurities such as cotton seed hulls and cotton stalks that cannot be boiled; [0004] 2. The original desanding process is simple, and the tailings are not treated, but directly discharged, resulting in a large loss of raw materials; [0005] 3. The desanding process is simple and cannot achieve good physical impurity removal effect. We can only increase the amount of chemicals used in the previous cooking process and improve the process conditions, resulting in a decrease in the internal quality and strength of raw materials. Contents of the invention [0006] The purpose of t...

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Problems solved by technology

[0003] 1. After the raw cotton linters are cooked, there are still hard impurities such as cotton seed hulls and cotton stalks that cannot be boiled;

[0004] 2. The original desanding process is simple, and the tailings are not treated, but directly discharged, resulting in a large loss of raw materials;

[0005] 3. The desanding process is simple and cannot achieve a good physical impurity removal effect. We can only increase the amount of chemicals used in the previous cooking process and improve the process conditions, resulting in a decline in the intrinsic quality and strength of raw materials.

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