Industrial waste salt slag innocent treatment method

Abstract

The invention discloses an industrial waste salt slag innocent treatment method. The industrial waste salt slag innocent treatment method mainly comprises the following steps: a) burdening materials according to types of the industrial waste salt slag, and uniformly mixing the materials; 2) drying the mixture, wherein the drying process at least comprises initial drying and medium microwave drying, the initial drying process can remove the most part of free water, the medium microwave drying can remove the crystal water and gasify a part of organic matters, and the drying temperature is a continuously adjustable stable temperature gradient; c) anaerobic microwave pyrolysis: pyrolyzing the dried mixture at the temperature of 450-500 DEG C and under a nitrogen charged environment for more than 100 minutes, so as to pyrolyze the organic matters to form micromolecules to be gasified, organic salt to be split and gasified and the contained ammonium salt to be decomposed; 3) conducting air cooling to the pyrolyzed waste salt to be put in storage, and then conducting complete innocent treatment to the pyrolyzed waste salt, detecting and then selling the qualified product or reusing the treated waste salt. The industrial waste salt slag innocent treatment method has the characteristics of safety, efficiency, energy conservation and the like, has the obvious advantage in the resource recycling aspect, can greatly slow down the solid waste management stress in the industrial developed area, in particular the chemical engineering petrochemical industry park, is favorable to promote the related sustained development of the park.

Description

technical field [0001] The invention relates to a method for harmless treatment of industrial waste salt slag, in particular to a method for harmless disposal and recycling of industrial waste salt slag, belonging to the technical field of waste slag treatment. Background technique [0002] Industrial waste salt slag refers to inorganic waste salt containing organic matter and other toxic and harmful substances and water produced in the industrial production process; it mainly comes from petrochemical, pesticide, pharmaceutical and fine chemical production solid-liquid separation, solution concentration crystallization and related industries Process wastewater pretreatment and other processes; domestic enterprises currently produce about 300,000-500,000 tons per year, mainly from the Yangtze River Delta and Pearl River Delta regions. [0003] Existing disposal technologies are: [0004] (1), direct thermal incineration method [0005] The method is to directly add the wast...

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Problems solved by technology

[0012] This disposal method is expensive, not only occupies a large amount of land, but also has the risk of secondary environmental damage caused by external factors such as geological disasters

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