Device for removing gas mercury by photo-catalysis and application thereof

Abstract

The invention discloses a device for removing gas mercury by photo-catalysis, which adopts the method for loading nanometer TiO2-SiO2 on fibers of a titanium mesh and installing a UV ultraviolet source on the middle part. The gaseous mercury passing through the fibers of the titanium mesh is oxidized as Hg2+ through arranging multi-branched double-cylinder pipe which can be detached in sections in a gas duct, and then the gaseous mercury can be removed through the lime slurry of equipment for removing sulfur by wet process. The reaction sections of the device for removing the gas mercury by photo-catalysis in the invention are separately connected, so the reaction sections can be conveniently detached and changed, the removing efficiency is over 60%, and the economical efficiency is good. Simultaneously the complete device has the advantages of little taken space and good economical efficiency, and the device can be conveniently detached and changed. The device can be applied to the relative fields of removing the gas mercury from power plants, industrial boilers and coal combustion facilities, and has wide prospect on popularization and application of environmental mercury pollution treatment technology.

Description

technical field [0001] The invention relates to a photocatalytic flue gas mercury removal device and its application in removing mercury from power plant flue gas, industrial boiler flue gas, and coal-fired equipment flue gas, and is mainly used in the field of coal-fired flue gas pollutant control , is a flue gas mercury removal device with high mercury removal efficiency, convenient operation and replacement, and low economic cost. Background technique [0002] Mercury is an element that widely exists in the environment, but it is not a necessary substance for living organisms, and it is highly toxic to higher organisms. What is even more frightening is that mercury and its compounds entering the atmosphere, hydrosphere and soil can be enriched to very high concentrations in organisms through the food chain in most cases. Mercury in the environment transfers and accumulates in animals and plants through the life activities of animals and plants, and finally enters the hu...

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Problems solved by technology

[0010] In the current published patents, the application of photocatalysis is mainly in water purification and air purification. It is mainly aimed at pollutants in the air, and there are few reports on photocatalytic devices and methods for mercury in flue gas.

In the current method specially used for mercury removal from flue gas, the process is relatively complicated and the cost is high. At present, there is no mercury removal technology that can be popularized and applied.

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