Production device of reclaimed white cotton from coloured cotton fabric an dits technology

Abstract

The invention discloses a device for producing regenerated white cotton of colored cotton textile and its process, where there are two parallel reaction cylinders, there are top and bottom crosswise communicating tail gas pipes on the two reaction cylinders, and each tail gas pipe is installed with a valve, a flow meter and a vacuum pump; there is a UV lamp arranged in each reaction cylinder; another flow meter is installed on each air inlet pipe, and a pressure meter and another vacuum pump are installed on each air outlet pipe; the production process is: firstly humidifying the colored cotton textile to be processed, by steam, to make the water content of the colored cotton textile at 10-25%; making prophase decoloring treatment on the humidified cotton textile by ozone at a concentration of 5-25%; synchronously performing late UV decoloring treatment on the treated cotton textile in an ozone-containing environment to make the cotton textile turn white; and finally making cotton opening treatment on the white cotton textile to make the regenerated white cotton. The invention has the characters of simple process, high production efficiency, no pollution, no damage to cotton spinning material, saving water resources, and safety and reliability in production.

Description

technical field [0001] The present invention relates to a recycling device and technology of cotton textiles, more specifically to a production device and technology for regenerated white cotton from colored cotton textiles, which is suitable for decolorization and recycling of colored cotton spinning scraps. Background technique [0002] my country's cotton textile industry plays a pivotal role in the national economy. However, the self-sufficiency of cotton production as a textile raw material is relatively insufficient, resulting in a shortage of cotton supply, which requires a large amount of imported supplies. However, every year, the domestic garment processing industry produces a large amount of cotton spinning waste with good texture. If it can be regenerated into usable white cotton, it will not only alleviate the shortage of domestic cotton supply, but also avoid waste cotton spinning. Pollution to the environment, reducing the expenditure on disposal of waste cott...

AI Technical Summary

Problems solved by technology

However, at present, the decolorization of colored cotton fabrics is usually to put colored cotton fabrics into high-concentration sodium hypochlorite solution and soak for 10-20 hours, then add a large amount of concentrated sulfuric acid in the soaking solution to corrode and decolorize colored cotton fabrics, in order to obtain Satisfactory decolorization effect, this method has the following disadvantages: because the treatment solution contains high concentration sodium hypochlorite, chloride ions seriously exceed the standard, and there is concentrated sulfuric acid in it, it can cause permanent damage to the environment after direct discharge; the cotton fabric after decolorization A large amount of clear water rinsing is also required, which seriously wastes water resources; and because the treatment process adopts long-time soaking and adds a large amount of concentrated sulfuric acid, the cotton fiber itself of the cotton fabric is also damaged to a certain extent during decolorization, making The strength and elasticity of cotton fibers are reduced, which directly affects the quality of regenerated white cotton and cannot produce high value-added products

At the same time, the required sodium hypochlorite is obtained by passing liquid chlorine into sodium chloride solution, and liquid chlorine is a dangerous product, which is not suitable for transportation. Casualties and accidents caused by the transportation of liquid chlorine occur from time to time. Regeneration of colored cotton spinning scraps White cotton brings hidden dangers

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