Method for treatment of mixed wastewater produced during production of rubber accelerator NS\CZ\DZ

Abstract

The present invention provides a method for treatment of mixed wastewater produced during production of a rubber accelerator NS\CZ\DZ. The mixed waste water is cooled to 50 to 70 DEG C, resin is precipitated by primary precipitation, so that 20-30 percents of resin is removed, and unprecipitated resin is filtered by filter cotton; hydrochloride is added to filtered water for acid-adjusting treatment, and pH of the water is adjusted to 3-5; stirring and precipitating are conducted, the obtained sediment is released from the bottom of a tank, then a liquid alkali is added to the water for alkali-adjusting treatment, and pH of the water is adjusted to 8-9; hydrogen peroxide with the usage amount being 0.3-0.8 percent of the water is added for oxidation treatment; and stirring is performed, a supernatant is filtered by a close bag, and an obtained filtrate is subjected to one-effect and two-effect evaporation in MVR distillation equipment. Simple methods of acid-base regulation and oxidation are used to recycle organic components in the waste water and the purposes of consumption reduction, waste reduction and environmental protection are achieved by evaporating to separate inorganic salts from the waste water. COD of the wastewater is reduced to 700 or below, mechanical application of return water is fully achieved, and the method is easily-operated, economical and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of accelerator sewage treatment, in particular to three rubber accelerators NS (N-tert-butyl-2-benzothiazole sulfenamide) / CZ (N-cyclohexyl-2-benzothiazole sulfenamide) / DZ (N, N-dicyclohexyl-2-benzothiazole sulfenamide) three kinds of mixed wastewater treatment methods Background technique [0002] With the development of China's rubber industry, my country's rubber additives industry has also been rapidly developed and expanded, and is marching towards scale and intensification. After leap-forward development in recent years, the industrial scale and product quality have reached or even exceeded the international level, but traditional craftsmanship still occupies a dominant position. Lack of innovative green cleaning technology, lack of technical property rights support, the concept of sustainable development and circular economy needs to be further strengthened. Especially in the wastewater treatment industry, th...

AI Technical Summary

Problems solved by technology

These treatment processes have high investment and operating costs, large floor space, and harsh operating conditions, which are not conducive to large-scale implementation.

[0005] In the traditional process, these treatment processes are relatively simple. In terms of simple distillation, the sewage contains a large amount of organic matter, so desalination methods such as direct distillation cannot be adopted, because the organic matter will cause pipeline blockage and make it impossible to operate; other methods have no effect on sewage treatment. Very stable, and the operating cost is high, so the treatment of mixed wastewater production wastewater is very difficult

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