Device and method for removing dioxin in hazardous waste incineration flue gas

Abstract

The invention relates to a device and method for removing dioxin in hazardous waste incineration flue gas. The device comprises a device main body, a high-temperature tail gas conveying plate arranged in the device main body and a dust removal mechanism connected with the device main body; the inner wall of the device main body is connected with a plurality of first guide plates and a plurality of second guide plates; the multiple first flow guide plates and the multiple second flow guide plates are alternately distributed up and down; and a plurality of dioxin removal mechanisms are arranged in the device main body. According to the device and method for removing the dioxin in the hazardous waste incineration flue gas, activated clay is adopted to replace activated carbon, and the dioxin is fully and safely removed from high-temperature flue gas through the activated clay and a corresponding cooling and diversion system, so that the situation that the activated carbon is burnt due to the cooling fault of the high-temperature tail gas can be prevented, the burning of a dust collecting cloth bag caused by burning activated carbon and the like can be effectively prevented, stable operation of an incineration system is effectively guaranteed, and abnormal shutdown of the system caused by spontaneous combustion is avoided.

Description

Technical field[0001]The present invention belongs to the field of hazardous waste harmless treatment, and in particular, the removal apparatus and method of dioxin in hazardous waste incineration flue gas.Background technique[0002]With the acceleration of urbanization and improvement in people's living standards, the amount of domestic garbage has grown sharply, and the garbage harmless treatment has become an inevitable choice. At present, domestic waste treatment is a landfill, which has been denied in most areas due to environmental pollution. One is the use of waste incineration mode, which is treated as follows: First, after adding a chelating agent to add a chelating agent, the second is to use the harmful substance in the fly ash by activated carbon to use the harmful substance to industrial use. Such as tiles, pottery, etc. The current garbage incineration technology and process process they have an environmentally friendly problem that cannot be completely resolved, and th...

AI Technical Summary

Problems solved by technology

The current waste incineration technology and process itself have environmental protection problems that cannot be completely solved, causing harm to the environment and residents' lives

There is a certain amount of dioxins in the flue gas; there are harmful heavy metals and dioxins in the fly ash, which are hazardous wastes and cannot be recycled

[0003] In the prior art, activated carbon is used to remove dioxins in the flue gas of hazardous waste incineration. Because activated carbon is flammable at high temperature, activated carbon will burn when the temperature exceeds 500 °C, and once activated carbon burns, it will Directly burn the bag in the subsequent use of the bag filter. Although the high-temperature exhaust gas is rapidly cooled in the prior art, once there is a failure of the cooling system or an operation error by the crew, it will lead to irreversible failure of the entire device. Damaged, easy to cause safety accidents and lead to serious dioxin air pollution incidents, posing a potential major threat to the ecological environment

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