Treatment method of waste containing organic phosphorus chlorinated hydrocarbon

Abstract

The invention discloses a treatment method of waste containing organic phosphorus chlorinated hydrocarbon, which comprises the following steps: (1) continuously introducing the waste containing organic phosphorus chlorinated hydrocarbon and a calcium-containing compound into a thermal cracking reactor for thermal cracking reaction to obtain a thermal cracking material and a first gas-phase product; and (2) continuously introducing the thermal cracking material obtained in the step (1) and oxygen-containing gas into a decarburization reactor, carrying out a decarburization reaction to obtain chlorine-containing phosphorus slag and a second gas-phase product, continuously introducing the second gas-phase product, the first gas-phase product obtained in the step (1) and a combustion improver into a combustion reactor, carrying out combustion, treating tail gas obtained by combustion, and carrying out up-to-standard emission, and (3) dissolving the chlorine-containing phosphorus slag obtained in the step (2) with deionized water, adjusting the pH value of the solution, filtering, separating, and drying to obtain a calcium chloride aqueous solution and calcium phosphate. The method is simple in process, harmlessness and recycling of organic phosphorus chlorinated hydrocarbon waste treatment are achieved, secondary waste difficult to treat cannot be generated in the whole treatment process, and the green and environment-friendly requirements are met.

Description

technical field [0001] The invention relates to the technical field of hazardous waste treatment, in particular to a treatment method for organic phosphorus chlorinated hydrocarbon waste. Background technique [0002] In the production process of chemical, pesticide and other industries, organic waste liquid containing phosphorus and chlorinated hydrocarbons will be produced. Organic waste liquid contains high levels of phosphorus, which will not only cause great harm to the environment, but also directly endanger human health; while chlorinated hydrocarbons have "three causes" (carcinogenic, teratogenic, mutagenic) effects or suspicious "three causes" Chlorinated hydrocarbon hazardous waste poses a serious threat to the ecological environment and human life, and seriously restricts economic development. With the country's increasing emphasis on environmental protection and people's pursuit of a better living environment, how to safely, stably and reliably dispose of phosph...

AI Technical Summary

Problems solved by technology

[0004] ① Organochlorine has an inhibitory effect on combustion, resulting in unreasonable organization of the combustion process, poor combustion stability, and incomplete combustion

The traditional single combustion chamber furnace is difficult to effectively deal with the contradiction between coking, combustion temperature control and incineration efficiency when dealing with hazardous waste. Sufficient and other issues

[0005] ② It is difficult to control the combustion temperature to meet the requirements of hazardous waste incineration

Generally, the incineration temperature of municipal waste incinerators (such as grate furnace or fluidized bed boiler) is 800-900°C, but for chlorinated hydrocarbon hazardous waste, the incineration temperature is required to be above 1100°C, and the residence time of flue gas is greater than 2 seconds, so Traditional waste incinerators cannot meet the incineration requirements of chlorinated hydrocarbon hazardous waste

Although the combustion temperature of industrial kilns can reach above 1100°C, there is a serious problem of coking in some combustion areas due to the high temperature

[0006] ③The flue gas produced after combustion is easy to cause secondary pollution

However, once the chlorinated hydrocarbons contain organic phosphorus and other impurities, it will be more difficult to control the treatment temperature, which will affect the treatment efficiency.

Moreover, chlorinated hydrocarbons and organic phosphorus with high calorific value, which can inhibit combustion, will cause uneven temperature and coking of materials in the combustion furnace, which will lead to problems such as temperature control of the processing device, material freeze, and sudden stop, which will affect the processing effect.

[0008] In summary, the existing treatment methods for organic phosphorus-containing chlorohydrocarbon wastes have problems such as difficult operation control, low and unstable treatment efficiency, and easy to produce secondary pollution. Therefore, it is necessary to develop a safer and more economical treatment method. A method for efficiently treating organic phosphorus chlorohydrocarbon wastes, realizing harmless and resourceful treatment of organic phosphorus chlorohydrocarbon wastes

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