Pretreatment device for printing and dyeing production line and printing and dyeing production

Abstract

A pretreatment device for a printing and dyeing production line is used for performing desizing, refining and bleaching and comprises a pool, fabric stretching rollers and a power device, wherein the pool is made of an insulating material, a NaCl solution is injected into the pool, two fabric stretching rollers are arranged in the pool, fabric to be desized, refined and bleached is stretched between the two fabric stretching rollers, the fabric stretching rollers are immersed in the NaCl solution, surfaces of the fabric stretching rollers are made of an electrochemically inert electric conductive material, and the two fabric stretching rollers are connected with a cathode and an anode of a power supply respectively; the power device is in transmission connection with the fabric stretching rollers and used for driving the fabric stretching rollers to rotate. The NaCl solution is electrolyzed through the anode and the cathode, NaOH and oxide are generated, and accordingly, charging and production processes are simplified. Meanwhile, biochemical indexes of sewage produced by the production line in the overall operation process are remarkably lower than those of sewage produced by an existing production line, so that the sewage treatment cost is greatly reduced.

Description

technical field [0001] The invention relates to a production line for textile industry production, in particular to a desizing, scouring and bleaching production line for textile printing and dyeing pretreatment, and pretreatment equipment for printing and dyeing production. Background technique [0002] The printing and dyeing industry is the main industry with the largest scale, good foundation and long history in my country's textile industry. It has a development history of nearly a hundred years in my country. The types and quantities of dyes and chemicals used in the printing and dyeing industry are the largest. Since a large number of natural impurities contained in printing and dyeing varieties will affect the subsequent processing and product quality, chemical methods need to be used to remove them. [0003] In the prior art, the scouring and bleaching process of textile dyeing and printing includes three processes of desizing, scouring and bleaching. [0004] Dur...

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Problems solved by technology

The disadvantages of this process are: complex procedures, long equipment assembly line, high energy consumption, long working time, working liquid contains a large amount of caustic soda, bleaching agent, stabilizer, etc., high toxicity of discharged wastewater, serious environmental pollution, and high difficulty in treatment

[0008] At present, there are a small number of production lines that combine the three processes of desizing, scouring and bleaching. The combination of desizing, scouring and bleaching reduces processing links, saves energy and water, saves labor and labor, and improves processing efficiency. However, because the working fluid also contains A large amount of caustic soda, bleaching agent, stabilizer, and there are also cases where the discharged wastewater is highly toxic and pollutes the environment seriously

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