Recycling treatment technology of high-concentration organic waste alkaline liquor

Abstract

The invention belongs to the field of treatment of hazardous waste, and particularly relates to a recycling treatment technology of high-concentration organic waste alkaline liquor. The recycling treatment technology comprises the following steps of 1, adding acid to neutralize the high-concentration organic waste alkaline liquor; 2, after neutralizing, conducting oxidation, evaporation and crystallization on the solution to obtain waste salt; 3, after the waste salt is subjected to high-temperature prolysis, and conducting dissolution and filtering; 4, conducting catalytic oxidation and impurity removal on a filtrate prepared through dissolution and filtering; 5, conducting evaporative crystallization on an inorganic salt solution obtained after catalytic oxidation and impurity removal; 6, conducting thermal desorption on a crystal obtained through crystallization. According to the recycling treatment technology, the treatment cost is reduced, the treatment condition is lowered, a high-pressure environment is not needed, and more importantly, recycling of waste liquor is achieved.

Description

technical field [0001] The invention belongs to the field of hazardous waste treatment, and in particular relates to a resource disposal process of high-concentration organic waste lye. Background technique [0002] Waste lye is mainly alkaline wastewater with high pH, ​​and its source is mainly produced in the desulfurization process in oil refining process and petrochemical process. COD has peculiar smell and threatens human life and health; therefore, it is very necessary to treat this kind of special waste liquid before it is discharged into the environment. [0003] The neutralization method is to add acidic substances to this kind of waste liquid, but this cannot solve the problem of high COD; the limitation of the incineration method is that the waste liquid is large in volume, its calorific value is not high, and additional fuel is required, which consumes a lot of energy. The wet air oxidation method uses oxygen in the air as an oxidant under high temperature and h...

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Problems solved by technology

[0003] The neutralization method is to add acidic substances to this kind of waste liquid, but this cannot solve the problem of high COD; the limitation of the incineration method is that the waste liquid is large in volume, its calorific value is not high, and additional fuel is required, which consumes a lot of energy. The wet air oxidation method uses oxygen in the air as an oxidant under high temperature and high pressure to oxidize organic matter into carbon dioxide, water and small molecules in the liquid phase. Its disadvantages are high requirements for equipment, large investment, and large energy consumption. ; There are also biological methods, but the salinity itself has an impact on the growth of microorganisms, and it is difficult to handle this type of waste liquid

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