Diluted alkali recycling system of mercerizing machine

Abstract

The invention relates to a diluted alkali recycling system of a mercerizing machine. The diluted alkali recycling system comprises a diluted alkali tank, a temporary diluted alkali storage container, a stirrer arranged on the temporary diluted alkali storage container, a hydrogen peroxide supply system connected with the temporary diluted alkali storage container, a pneumatic valve, a first filter, a second filter, a concentrated alkali tank, an automatic alkali matching tank, an automatic alkali matching tank control cabinet and a matched alkali liquor storage tank. The diluted alkali tank, the temporary diluted alkali storage container, the first filter and the automatic alkali matching tank are connected through a pipeline in sequence. The concentrated alkali tank, the second filter and the automatic alkali matching tank are connected through a pipeline in sequence. The pneumatic valves are arranged between the concentrated alkali tank and the temporary diluted alkali storage container, between the temporary diluted alkali storage container and the filter and between the concentrated alkali tank and the second filter. The automatic alkali matching tank is connected with the matched alkali liquor storage tank. The diluted alkali recycling system is short in alkali liquor recycling period, the whole system is low in manufacturing cost, and the cost is low in the producing and processing process.

Description

technical field [0001] The invention relates to a light alkali recycling system for a mercerizing machine. Background technique [0002] The mercerizing process of printing and dyeing factories needs to use a large amount of sodium hydroxide solution to treat fabrics. The concentration of sodium hydroxide solution used by each factory is different, but it is generally in the range of 18~25Be 。 (Be 。 is the concentration unit of sodium hydroxide solution), within the scope of the spent lye after use, the concentration has been reduced to 3~5Be due to the dilution of clear water 。 , because the amount of sodium hydroxide solution is quite large, if it is discharged directly, it will cause a sharp increase in cost on the one hand, and on the other hand it will cause great difficulties for subsequent sewage treatment, and additional waste sulfuric acid will be consumed for neutralization. Therefore, currently larger printing and dyeing enterprises have their own light alkali r...

AI Technical Summary

Problems solved by technology

, but the alkali concentration used in processing is lower than 25Be

If there is too much alkali, it needs to be diluted with water and then used for production, which will consume some additional water resources) and return to the machine for repeated use. If the concentration is not reached, it will return to the evaporator through the return pipe to continue evaporation and concentration. This process It needs to consume a lot of steam, evaporate a lot of water, take a long time, and the cost of a whole set of equipment is very expensive

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