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A high-salt and high-cod chemical hazardous waste treatment and resource recovery method

A resourceful and chemical technology, applied in chemical instruments and methods, separation methods, petroleum industry, etc., can solve the problems of restricting the popularization and application of incineration and landfill methods, high project cost, high COD, etc., and avoid catalyst deactivation As well as the effect of safety accidents, small footprint, and reduced operating costs

Active Publication Date: 2020-05-01
NANJING UNIV-INT RES INST OF ENVIRONMENTAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, rigid landfills are required to deal with high-salt and high-COD chemical hazardous waste, which makes the project cost very high
At the same time, there are also problems such as occupying a large amount of land and producing a large amount of high-COD and high-salt leachate.
These defects limit the popularization and application of incineration and landfill to a certain extent.

Method used

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  • A high-salt and high-cod chemical hazardous waste treatment and resource recovery method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] see figure 1 , a high-salt and high-COD chemical hazardous waste treatment and recycling method, the method comprises the following steps:

[0027] (1) Pretreat the high-salt and high-COD chemical hazardous waste; during the pre-treatment, the high-salt and high-COD chemical hazardous waste is transported to the metering storage tank through the conveying device, and then an appropriate amount of water is added to prepare the material slurry , and preheating and stirring the material slurry; the concentration of the material slurry is 15-35wt%;

[0028] (2) The pretreated material slurry is subjected to thermal hydrolysis treatment to generate high-concentration brine and mixed gas; the thermal hydrolysis treatment is carried out in a thermal hydrolysis reactor, using batch operation or continuous mode operation, in Pressurization and decompression devices are installed before and after the thermal hydrolysis reactor; the thermal hydrolysis treatment is carried out at ...

Embodiment 2

[0037] see figure 1 , a high-salt and high-COD chemical hazardous waste treatment and recycling method, the method comprises the following steps:

[0038] (1) Pretreat the high-salt and high-COD chemical hazardous waste; during the pre-treatment, the high-salt and high-COD chemical hazardous waste is transported to the metering storage tank through the conveying device, and then an appropriate amount of water is added to prepare the material slurry , and preheating and stirring the material slurry; the concentration of the material slurry is 15-35wt%;

[0039] (2) The pretreated material slurry is subjected to thermal hydrolysis treatment to generate high-concentration brine and mixed gas; the thermal hydrolysis treatment is carried out in a thermal hydrolysis reactor, using batch operation or continuous mode operation, in Pressurization and decompression devices are installed before and after the thermal hydrolysis reactor; the thermal hydrolysis treatment is carried out at ...

Embodiment 3

[0048] see figure 1 , a high-salt and high-COD chemical hazardous waste treatment and recycling method, the method comprises the following steps:

[0049] (1) Pretreat the high-salt and high-COD chemical hazardous waste; during the pre-treatment, the high-salt and high-COD chemical hazardous waste is transported to the metering storage tank through the conveying device, and then an appropriate amount of water is added to prepare the material slurry , and preheating and stirring the material slurry; the concentration of the material slurry is 15-35wt%;

[0050] (2) The pretreated material slurry is subjected to thermal hydrolysis treatment to generate high-concentration brine and mixed gas; the thermal hydrolysis treatment is carried out in a thermal hydrolysis reactor, using batch operation or continuous mode operation, in Pressurization and decompression devices are installed before and after the thermal hydrolysis reactor; the thermal hydrolysis treatment is carried out at ...

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Abstract

The invention relates to a high salt high COD chemical hazardous waste treating and recycling method which comprises the following steps: (1) pre-treating high salt high COD chemical hazardous wastes;(2) carrying out pyrohydrolysis on the pre-treated material slurry to generate high concentration saline and mixed gas; and (3) recovering salt substances from the high concentration saline by meansof an evaporating technique, and converting the mixed gas into methane by means of a catalytic reforming technique to obtain a clean energy source. The method has the advantages of being high in organic matter removal rate, high in salt recovery rate, and free of toxic and side products, generating the clean energy source and the like, and can achieve an aim of integrating efficient treatment andrecycling of the high salt high COD chemical hazardous waste.

Description

technical field [0001] The invention belongs to the technical field of chemical hazardous waste treatment, and in particular relates to a high-salt and high-COD chemical hazardous waste treatment and resource recovery method. Background technique [0002] In recent years, the vigorous development of my country's chemical industry has brought huge economic benefits to the society, but also brought environmental problems. In the production process of many chemical industries, a large amount of solid, semi-solid or slurry waste is produced. These wastes are physically, chemically or biologically hazardous, and are harmful or potentially harmful to humans or other living organisms. Especially for the high-salt and high-COD chemical hazardous waste produced in the chemical industry such as pharmaceuticals or pesticides, the hazards are more significant. Therefore, in order to reduce the impact of these hazardous wastes on humans and the environment, they must be properly dispose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10L3/08C10L3/10B01D53/28
CPCY02P20/151
Inventor 吕路王林平黄前霖徐敬生张炜铭潘丙才
Owner NANJING UNIV-INT RES INST OF ENVIRONMENTAL IND
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