Pretreatment method of hazardous waste materials

A material and quality technology, applied in chemical instruments and methods, bulk chemical production, other chemical processes, etc., can solve problems such as the difficulty of meeting the fluidity and water solubility of hazardous wastes

Active Publication Date: 2019-08-02
廊坊新奥龙河环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the fluidity and water solubility of the current hazardous waste are difficult to meet the requirements of supercritic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This embodiment provides a pretreatment method for hazardous waste materials.

[0020] The material to be processed is 50kg of waste liquid from Langfang Shenhua Industry and Trade Co., Ltd. The waste liquid has a calorific value of 25MJ / kg and contains more than ten kinds of metal elements, among which the content of iron element is 12000mg / kg, which is difficult to emulsify.

[0021] The waste liquid is fully mixed with 0.5kg sorbitan fatty acid ester at a stirring rate of 600rpm, and when the fluidity of the material changes significantly, 45kg of 30°C water is added to fully mix, and then 1kg of ethoxylated alkyl Sodium sulfate and 0.5kg nonylphenol polyoxyethylene ether NP-7 were mixed at a stirring rate of 400rpm, and finally the calorific value of the material was adjusted to 4.2MJ / kg with water. The waste liquid is smoothly emulsified to form a uniform liquid state with good fluidity and water solubility, which meets the feed requirements of the supercritical wa...

Embodiment 2

[0023] This embodiment provides a pretreatment method for hazardous waste materials.

[0024] The material to be treated is 50kg of waste oil agent from Kangde Composite Materials Co., Ltd., with a calorific value of 46MJ / kg, containing four metal elements.

[0025] Mix the waste oil agent with 1.5kg sorbitan fatty acid ester at a stirring rate of 700rpm. When the apparent color of the material changes significantly, add 55kg of water at 70°C and mix thoroughly, then add 1.5kg of ethoxylated alkanes Sodium sulfate, 1kg nonylphenol polyoxyethylene ether NP-7 and 0.5kg polyvinyl alcohol were mixed at a stirring rate of 500rpm, and finally the calorific value of the material was adjusted to 4.2MJ / kg with water. The waste oil agent is successfully emulsified to form a uniform liquid state with good fluidity and water solubility, which meets the feeding requirements of a supercritical water oxidation treatment system.

Embodiment 3

[0027] This embodiment provides a pretreatment method for hazardous waste materials.

[0028] The material to be processed is the same as in Example 1.

[0029] The waste liquid is fully mixed with 0.5kg sorbitan fatty acid ester at a stirring rate of 600rpm, and when the fluidity of the material changes significantly, then 75kg of 30°C water is added to fully mix, and then 1kg of ethoxylated alkyl Sodium sulfate and 0.5kg nonylphenol polyoxyethylene ether NP-7 were mixed at a stirring rate of 400rpm, and finally the calorific value of the material was adjusted to 4.5MJ / kg with water. The waste liquid is smoothly emulsified to form a uniform liquid state with good fluidity and water solubility, which meets the feed requirements of the supercritical water oxidation treatment system.

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PUM

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Abstract

The invention relates to the technical field of waste liquid treatment, in particular to a pretreatment method of hazardous waste materials. According to the treatment method, to-be-treated materialsand an emulsifier A with HLB (hydrophile-lipophile balance) being 3-5 are sufficiently mixed, water is added, the mixture is sufficiently mixed, an emulsifier B with HLB being 7-8, an emulsifier C with HLB being 11.5-12.5 and a thickening agent are added, the mixture is sufficiently mixed, and finally, the calorific value of the materials is adjusted to be 4.2-4.5 MJ/kg with water. The materials are sequentially mixed with emulsifiers with different HBL values, so that the materials are sufficiently emulsified and have good flowability and water solubility, and the feeding requirements of a supercritical water oxidation treatment system can be met.

Description

technical field [0001] The invention belongs to the technical field of waste liquid treatment, and in particular relates to a pretreatment method for hazardous waste materials. Background technique [0002] Supercritical water oxidation technology is a technology for deep oxidation treatment of organic waste using supercritical water as the medium. It was originally used in the field of national defense, and now it is gradually becoming dominant in the treatment of daily environmental waste and industrial waste. In addition to the research on many model pollutants such as oxygen, nitrogen, heteroatoms, etc., there have been a large number of researches related to supercritical water oxidation technology on the treatment of wastes from chemical synthesis, pharmaceuticals, food processing, and municipal sludge. This technology oxidizes organic waste in sludge and liquid hazardous waste into carbon dioxide, water, nitrogen and other small molecules by injecting oxygen into the ...

Claims

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Application Information

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IPC IPC(8): C09K3/32
CPCC09K3/32Y02P20/54
Inventor 李宁宁宋成才高志远孟郊张帆高申
Owner 廊坊新奥龙河环保科技有限公司
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