Industrial organic waste salt treatment process

Abstract

The invention discloses an industrial organic waste salt treatment process which comprises the following steps: adding a certain amount of waste salt solution into a reactor; then adding sulfuric acidto stir for a warming reaction, and after the reaction, continuously adding a certain amount of waste salt solution; sucking hydrogen chloride gas in a resultant of reaction in a negative pressure condition into an absorption tower to be absorbed by water to be finally converted into a by-product hydrochloric acid; and carrying out cooling, crystallizing, filtering, filter cake washing, neutralizing, adsorbing, filtering and drying on another resultant sodium sulfate to finally prepare a product sodium sulfate. According to the process, waste salt is recycled, and organic matters can be removed in a normal temperature condition without high temperature incineration, so that the energy source is saved, the investment and operating cost are reduced, and the produced sodium sulfate is recycled, so that a purpose of turning waste into wealth is achieved.

Description

technical field [0001] The invention relates to a process for treating industrial organic waste salt, which belongs to the field of environmental protection. Background technique [0002] In the fields of pesticides, pharmaceuticals, fine chemicals, organic chemicals, dyestuffs, coal chemicals and other chemical industries, a large amount of industrial waste salt is produced in industrial production. Traditional stacking or landfill methods not only occupy a large amount of land resources, but also require high processing costs. Improper use will also cause serious pollution of land and groundwater resources, posing a great threat to human life and the living environment. With the improvement of people's awareness of the hazards of industrial waste, the strengthening of the state's efforts to remediate industrial hazardous waste, and the development of related technical means, the harmless treatment and methods of industrial waste salt have attracted people's attention. At ...

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Problems solved by technology

High-temperature incineration method: high-temperature incineration of industrial waste salt to achieve the purpose of removing organic matter in waste salt; due to the high-temperature treatment method, affected by factors such as temperature and technology, waste salt is prone to melting or softening and agglomeration, and sticks to the equipment In this process, the equipment will be severely corroded or obstructed, making the equipment unable to operate continuously; therefore, it is difficult to apply it to industrial production technology

In addition, due to the high temperature treatment method, the energy consumption is large, and the investment and operation costs are high

Washing method: Wash the industrial waste salt with water and chemical detergent, neutralize and wash away the organic matter and impurities in the waste salt. This method can be used for industrial waste salt with a single organic component, low value, and fixed content. For industrial waste salt with many types of organic matter, high value and unstable content, it is difficult to moderately and reasonably control the amount of detergent, and it is difficult to completely remove organic matter in waste salt; in addition, after using this method to treat industrial waste salt, In the liquid, toxic and harmful organic substances or secondary pollutants may remain, and they still need to be treated harmlessly, and the treatment process becomes more and more complicated; therefore, it is not suitable for promotion and use in industrial production

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