Device and method for desulfuration, denitration and demercuration by using microwave induction and catalysis jointly

Abstract

The invention discloses a device and a method for desulfuration, denitration and demercuration by using microwave induction and catalysis jointly. The device comprises a reactor and a microwave transmission and control device and further comprises at least three single mode microwave sources, at least three reaction cavities with microwave feedback ports are arranged in the reactor, and the reaction cavities are respectively communicated with the single mode microwave sources through the microwave transmission and control device. A short-circuit plunger opposite to positions of the microwave feedback ports of the single mode microwave sources is further arranged in each reaction cavity, and separation walls used for smoke to smoothly pass through and being capable of effectively avoiding mutual interference between single mode microwave in adjacent cavities are arranged among the reaction cavities. A catalytic agent / catalyst carrier for mainly conducting redox reaction on sulfur dioxide, nitric oxide and simple substance mercury in the smoke is respectively arranged in the reaction cavities. The device is high in joint desorption efficiency of smoke pollutant of the smoke of a plant, low in cost and small in equipment occupation space.

Description

technical field [0001] The invention belongs to the field of comprehensive treatment of flue gas in coal-fired power plants, and in particular relates to a microwave-induced catalytic combined desulfurization, denitration and demercuration device and a method thereof. Background technique [0002] Compared with most countries in the world, my country is a big energy consumer with "rich coal, poor oil, and little gas". At present, coal accounts for about 70% of primary energy production and consumption. In the next 30 to 50 years, my country's coal-based energy structure will not undergo fundamental changes. By the end of 2010, my country's thermal power installed capacity accounted for 73.7% of the total installed capacity of power generation, and the installed capacity of power generation capacity was about 700 million kilowatts. Coal-fired power plants also emit a large amount of pollutants while producing electricity, mainly including SO 2 , NOx and other gas pollutants...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the desulfurization, denitrification and demercuration devices in the prior art are: the redox reaction of a type of desulfurization, denitrification and demercuration device in the prior art is completed in one reaction chamber, and the same catalyst is used, which easily causes SO 2 One or more of , NOx and Hg are not fully removed, and the combined removal efficiency is low; another type of desulfurization, denitrification and mercury removal device in the prior art uses multiple reaction equipment, respectively for SO 2 , NOx and Hg are set to remove catalysts individually, resulting in high cost and large equipment footprint

[0006] The disadvantages of the existing desulfurization, denitrification and mercury removal methods are: most of the existing technologies are concentrated in the research of desulfurization and denitrification methods, using electric energy, ultrasonic waves, etc. The efficiency is low, and the desulfurization, denitration and demercuration in one reaction chamber is easy to cause SO 2 One or more of , NOx and Hg is not fully removed, and the combined removal efficiency is low

In the existing published patents, magazines and academic journals, the research on the method of microwave desulfurization and denitrification basically uses multi-mode microwave as the heat source, and there is no research on the method of using single-mode microwave-induced catalysis combined with desulfurization, denitrification and denitrification. Compared with single-mode microwave, multi-mode microwave has lower power and poor uniformity

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