Industrial waste salt slag innocent treatment method

A technology for harmless treatment and industrial waste salt, which is applied in the fields of harmless treatment of industrial waste salt residue, harmless disposal of industrial waste salt residue and resource utilization, which can solve the problem of occupying large land, secondary environmental hazards and high cost. and other issues to achieve the effect of promoting sustainable development

Active Publication Date: 2015-02-11
ZHEJIANG DONGTIANHONG ENVIRONMENTAL PROTECTION ENG CO LTD
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  • Application Information

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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

Method used

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  • Industrial waste salt slag innocent treatment method

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Embodiment

[0054] Embodiment: First, make a judgment on the source of the waste salt slag (the place of origin is firstly classified), and carry out batch detection in the warehouse, and mix the ingredients according to the source and category, and strive to mix the materials evenly. First, coarse granulation, then initial drying to remove most of the free water, and then moderate microwave drying under reduced pressure (vacuum), trying to remove crystal water and gasify part of the organic matter, after moderate microwave drying, then anaerobic Microwave cracking unit, control the temperature at 450-500 degrees, and crack for more than 100 minutes in a nitrogen-filled environment. Organic matter is cracked into small molecules and then gasified, organic salts are decomposed and gasified, and ammonium salts are decomposed. The waste salt after cracking is completely recovered. It is harmless and stored in the warehouse after air cooling. After passing the test, it is sold for reuse. The p...

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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...

Claims

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Application Information

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IPC IPC(8): F23G7/00
CPCF23G7/02F23G2209/00
Inventor 项贤富李康
Owner ZHEJIANG DONGTIANHONG ENVIRONMENTAL PROTECTION ENG CO LTD
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