Dangerous waste rotary kiln flue gas dry deacidification device

Abstract

The invention relates to a flue gas dry-process deacidification device for a hazardous waste rotary kiln. The flue gas dry-process deacidification device comprises a deacidification agent spraying device 1, a flue gas static mixing mass transfer device 2, a connecting pipe, an air cannon 3, an ash discharge port 4, a Venturi acceleration device 5 and a deacidification reactor, wherein the deacidification agent spraying device 1 is arranged at a flue gas inlet pipe; the flue gas static mixing mass transfer device 2 is communicated with the venturi acceleration device 5 through a connecting pipe; an air cannon 3 and an ash discharge port 4 are arranged at the bottom of the connecting pipe; and the venturi accelerating device 5 is communicated with the deacidification reactor. The flue gas deacidification device has the beneficial effects that turbulent mixing of flue gas and a deacidification agent at a microscopic level is realized through the flue gas static mixing mass transfer device and the Venturi acceleration device, the contact reaction time of the flue gas and the deacidification agent is prolonged, and the deacidification efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of dry deacidification, more specifically, to a dry deacidification device for flue gas from a hazardous waste rotary kiln. Background technique [0002] Flue gas dry deacidification is a technology that uses powdered or granular solid reactants (such as baking soda, slaked lime) to chemically or physically react with sulfur-containing gaseous pollutants in flue gas to achieve the effect of deacidification. This deacidification technology For the gas-solid reaction, the reaction rate and gas mixing are the main factors restricting the efficiency of dry deacidification. [0003] Conventional dry deacidification devices are usually composed of Venturi tubes, inner and outer cylinders, inlet and outlet flues, etc. The existing Venturi tubes can make the airflow form turbulent flow to collide and rub against each other, so that the gas and solid can be mixed to a certain extent. However, considering the high re...

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Problems solved by technology

[0003] Conventional dry deacidification devices are usually composed of venturi tubes, inner and outer cylinders, inlet and outlet flues, etc. The existing venturi tubes can make the air flow form turbulent flow and collide and rub against each other, so that the gas and solid can be mixed to a certain extent. However, considering the current high requirements for environmental protection and ultra-low emissions, and the fact that it is difficult to increase the height of the deacidification reactor in the hazardous waste industry, the deacidification efficiency of the existing technology is relatively low.

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