A proton membrane electrocatalytic flue gas desulfurization and denitrification device

Abstract

The invention discloses a flue gas desulfurization and denitration device utilizing proton membrane electrocatalysis. The device is composed of a catalytic reaction absorption tower and an electrolytic reactor. The electrolytic reactor is communicated with the catalytic reaction absorption tower through a hydrogen gas opening (9) of a guide plate (10). A tower body shell (27) of the catalytic reaction absorption tower is internally provided with a baffle (28), a first desulfurization and denitration catalyst packing layer (2), an upper bearing plate (26), a carbon fixation catalyst packing layer (3), a middle bearing plate (25), a second desulfurization and denitration catalyst packing layer (4), a lower bearing plate (24), a solid-liquid separator (23), a flue gas distributor (6) and a hydrogen gas distributor (7) in sequence from the upper end to the position close to the lower end. The electrolytic reactor is internally provided with an electrolytic reaction chamber. The electrolytic reaction chamber is internally provided with anode plates (14) and cathode plates (12), and the anode plates (14) are separated from the cathode plates (12) through proton membranes (13). The flue gas desulfurization and denitration device has the advantages of being simple in structure, small in occupied area, low in investment and operation cost, high in flue gas purification efficiency and good in product recycling effect.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization and denitrification devices. Specifically relates to a proton membrane electrocatalytic flue gas desulfurization and denitrification device. Background technique [0002] With the continuous acceleration of industrialization and urbanization in our country, industry occupies an increasing proportion in the growth of the national economy, and human demand for energy is also increasing day by day. The consumption of natural resources such as coal, oil, and natural gas is increasing day by day, resulting in air pollution. A few days ago, the smog weather in many cities across the country has challenged the living environment of human beings. Harmful gases in the atmosphere have attracted much attention from all walks of life at home and abroad because of their characteristics of strong toxicity, wide spread and difficulty in control. SO 2 , NO X and CO 2 and other flue gas as th...

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Problems solved by technology

SO 2 , NO X and CO 2 and other flue gas as the main pollutants, among which SO 2 , NO X Acid rain will be formed, and pollution phenomena such as photochemical smog will also be formed, which will not only endanger people's respiratory system, but also destroy the normal growth of vegetation; and a large amount of CO released in the air 2 , seriously affecting climate change and causing the "greenhouse effect", so how to effectively control SO 2 , NO X and CO 2 Harmful smoke has become an imminent environmental issue

[0003] Currently, for flue gas SO X Limestone-gypsum method is mainly used for the removal of the limestone-gypsum method. The limestone-gypsum method has achieved some results in research and environmental protection, but there are problems of complex equipment, large investment, and high operating costs. When the SO in the flue gas 2 When the fluctuation is relatively large, the amount of limestone is difficult to control, and the generated CaSO 3 and CaSO 4 Easy to clog pipes and equipment

For flue gas NO X The removal mainly adopts the catalytic reduction method, and the catalytic reduction method removes the NO in the flue gas X Although the emission concentration can be reduced to a low level, it consumes a large amount of NH 3 , and some also consume fuel gas, resulting in large economic losses

in reducing CO 2 Among the concentration methods, the most studied reduction methods are thermochemical reduction and photocatalytic reduction, among which thermochemical reduction requires high temperature and high pressure, and CO will be generated during the reduction process. 2 ; Although photocatalytic reduction is environmentally friendly and energy-saving, but the yield is low and the speed is slow

[0004] The traditional process is mostly to install a denitrification device behind the desulfurization device or in front of the dust collector to achieve combined desulfurization and denitrification. This hierarchical treatment method has many disadvantages such as large area occupation, high investment and operating costs

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