Cotton brei pulp preparation and pollution treatment method

Abstract

The invention relates to a cotton brei pulp preparation and pollution treatment method, belonging to the pulp making paper making or textile field. The method specifically includes the following steps: cotton brei pulp is obtained by deep purification, preimpregnating, steaming and cooking, pulping, bleaching and drying of cotton linter, steaming and cooking thick waste liquid is cooled and filtered to separate a composite surfactant mainly including sodium pectate, sodium cotton alcohol, sodium stearate and oligosaccharides and the like, then the steaming and cooking thick waste liquid is recycled for steaming and cooking, the separated composite surfactant can be used in cement to play the role of water reducing, retarding and dispersing and enhancement, the pulping and bleaching and washing wastewater is treated by a wastewater treatment system for up-to standard discharging. The advantage of the cotton brei pulp preparation and pollution treatment method is that: thick waste liquid and washing water in the process of cotton brei pulp preparation are treated alone, organic matters and residual alkali in the thick waste liquid are effectively used, the operation load of the waste water treatment system is greatly reduced, and stable and standard treatment can be achieved.

Description

technical field [0001] The invention relates to a method for preparing cotton pulp and its pollution control. It belongs to the field of pulping, papermaking or textile. Background technique [0002] my country's cotton production accounts for about 24% of the world's total cotton production, ranking first in the world. The corresponding amount of cotton linters is also relatively large. The cellulose content of cotton linters is as high as more than 90%. In addition, it also contains a small amount of pectin ( About 1%), wax (about 2%), lignin (2% to 3%), ash (1%) and other substances are high-quality fiber raw materials for man-made fibers and papermaking industries. Cotton linter pulp can be used to produce banknote paper, military map paper, marine paper, watercolor paper, special number printing paper, special white decorative paper, steel paper base paper, three filter base paper, qualitative filter paper, wool spinning special base paper and pulp (production of viscos...

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the relatively low concentration of waste liquid after cotton linters cooking, the consumption of enriched combustion needs to be large and combined with the middle water for treatment, which will greatly increase the load of the water treatment system, and it is difficult to meet the discharge standard; high residual alkali discharge will cause waste of caustic soda, etc. question

The invention provides a treatment method for cotton linter pulping and its pollutants, which simultaneously solves the problems of cotton linter pulping and pollution, realizes the effective utilization of cotton linter fibers and simultaneously obtains pollutants produced in the pulping process. effective use and governance

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