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Refined cotton production and pollutant treatment method

A technology for pollutants and refined cotton, applied in pulping, papermaking or textile fields, can solve the problems of biochemical water treatment system impact, treatment efficiency discount, difficulty in emission standards, etc. Effect

Active Publication Date: 2015-09-02
CHINA NAT PULP & PAPER RES INST CO LTD
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the relatively small scale of refined cotton enterprises, the production is intermittent, and the intermittent discharge of waste liquid will have an impact on the biochemical water treatment system, greatly reducing its treatment efficiency, and it is very difficult to meet the current discharge standards.
Combining source prevention and end treatment to solve the comprehensive utilization and treatment of refined cotton preparation and process pollutants

Method used

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  • Refined cotton production and pollutant treatment method

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Effect test

Embodiment

[0026] A method for preparing refined cotton and its pollutant treatment

[0027] (1) Deep purification of cotton linters

[0028]Using a mechanical disintegrator, the cotton linters, cottonseed husks, cotton boll shells, sand and dust are peeled off from each other, screened by a vibrating screen with a sieve hole of 0.5 cm, and the heavy impurities with a particle size of less than 0.5 cm are screened and removed. It is sent to the vibrating corrugated conveyor belt with a wind hood. The corrugated depth of the corrugated conveyor belt is 1cm, the width is 0.5cm, and the amplitude is 2-3cm; the cottonseed husk, boll shell and sand that have not been removed by the vibrating screen will gather in The corrugated material of the corrugated conveyor belt is sent to the heavy miscellaneous collection bin, and the dust will be collected by the upper wind hood during the vibration process.

[0029] It can effectively reduce the ash content of cotton linters, cotton seed hulls and ...

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Abstract

The invention relates to a refined cotton production and pollutant treatment method and belongs to the field of pulping and papermaking or spinning. The method specifically includes the following steps that cotton linter is subjected to deep purification, preimpregnation, cooking, pulping, bleaching and drying prior to obtaining refined cotton, waste liquid is lower than 100mg / L in COD concentration after secondary physicochemical treatment, and sludge generated in the waste liquid treatment process is produced into compound fertilizer via aerobic composting. The method has the advantages that consumption of fresh water in the refined cotton production process is low, waste liquid generation amount is small, the waste liquid treatment process is high in flexibility, and treated secondary pollutants are utilized comprehensively.

Description

technical field [0001] The invention relates to a method for preparing refined cotton and treating pollutants thereof. It belongs to the field of pulping, papermaking or textile. Background technique [0002] Refined cotton is a non-toxic, odorless, uniform and loose white floc that is easy to absorb water. It is the main material for the manufacture of ether cellulose, nitrocellulose and cellulose acetate. The general formula of refined cotton: (C6H1005)n. n represents the polymerization degree of cellulose, which is widely used in many fields such as food, medicine, daily chemicals, plastics, electronics, papermaking, metallurgy, aerospace, etc., and is known as "special industrial monosodium glutamate". [0003] Refined cotton can be used to make ether cellulose, mainly to produce various additives and thickeners, such as product additives, which can be added to food and beverages as anti-sedimentation agents and thickeners, and can also extend the shelf life; used in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/02D21C1/00D21C3/02D21C9/18D21C9/14D21C11/00D21C11/04C05G1/00C05F7/00
CPCC05F7/005C05G1/00D21B1/02D21C1/00D21C3/022D21C9/14D21C9/18D21C11/0042D21C11/04Y02A40/20
Inventor 苏振华冯文英张羽刘文
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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