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Co-processing technology of organic hazardous wastes in cement kiln

A hazardous waste and co-processing technology, applied in the combustion method, combustion type, incinerator, etc., can solve the problems of increasing greenhouse gas emissions, large ash and slag production, secondary pollution, etc., and achieve reduction and treatment capacity. The effect of large and saving coal consumption

Inactive Publication Date: 2012-06-27
郑慧
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Problems solved by technology

However, the simple incineration disposal has the following disadvantages: ①The amount of ash produced is large, up to 20%, and the ash is identified as hazardous waste, the disposal is not thorough, and there is a possibility of secondary pollution; ②It causes waste of heat energy and does not realize resource utilization Utilization; ③Increased emissions of greenhouse gases

Method used

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  • Co-processing technology of organic hazardous wastes in cement kiln
  • Co-processing technology of organic hazardous wastes in cement kiln

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Embodiment 1

[0029] In the distillation residue produced by a tannery, the content of C element is 41.51%, and the content of H, N, S, Cl and O are 6.45%, 3.31%, 1.30%, 0.17% and 29.43%, respectively, accounting for 40% of the total 82.17%.

[0030] Add water to each batch of rectification residue for liquefaction, the addition amount is 15%, so that the rectification residue changes from a viscous semi-solid state to a less viscous flow state. The liquefied distillation residue was precipitated for 2 hours and then filtered. Add a flash point enhancer to the filtered rectification raffinate for stabilization, and the addition amount is 0.03%. The rectification raffinate produced after pretreatment is sprayed into the cement kiln at a rate of 1.8 tons per hour through the kiln inlet system to replace part of the fuel.

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Abstract

The invention provides a co-processing technology of organic hazardous wastes in a cement kiln. The co-processing technology comprises the following steps of: (a) liquefying the organic hazardous wastes with a solvent for reducing the viscosity of the organic hazardous wastes; (b) filtering the organic hazardous wastes after precipitation; (c) adding a stabilizer into the organic hazardous wastes after filtering for stabilization; and (d) spraying the organic hazardous wastes after pretreatment into the cement kiln via a kiln entry system for replacing part of fuel. Waste gas produced in the step (d) can achieve the emission standard after treatment. The co-processing technology disclosed by the invention is low in energy consumption, the organic hazardous wastes can be effectively disposed, the production of clinker during the incineration process is avoided, the coal consumption during the cement production process is saved, and the organic hazardous wastes can truly realize reduction, harmlessness and resource disposal.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment in the field of environmental protection, and in particular relates to a process for co-processing organic hazardous waste generated in industrial production processes by using cement kilns after pretreatment. Background technique [0002] With the development of my country's industry, the amount of organic hazardous waste is increasing. Organic hazardous waste mainly includes organic solvent waste, waste mineral oil, refining (distillation) residue, waste organic solvent, etc., which are not only difficult to biodegrade, but also have toxic effects such as carcinogenic, teratogenic, and mutagenic to organisms and humans. Proper disposal can pose a serious threat to human health. According to reports, 80% to 90% of human cancers are related to environmental factors, and 80% of the discovered carcinogenic chemicals are organic pollutants. Therefore, effective treatment of organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/00
Inventor 郑慧
Owner 郑慧
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