Flue gas denitrification treatment system and method based on ozone low-temperature oxidation

Abstract

The invention discloses a flue gas denitrification treatment system based on ozone low-temperature oxidation. The flue gas denitrification treatment system comprises an ozone preparation unit and a denitrification treatment unit, wherein the ozone preparation unit comprises an ozone machine set which is connected with an external gas source and a cooling unit which is connected with the coolant inlet of the ozone machine set; the denitrification treatment unit comprises a mixing reactor and a scrubbing tower; the inlet of the mixing reactor is connected with the ozone outlet and a flue gas inlet of the ozone machine set; the outlet of the mixing reactor is connected with the scrubbing tower. The invention further discloses a treatment method of the flue gas denitrification treatment system. The treatment method comprises the following steps: 1) performing a mixing oxidation reaction on a flue gas and ozone prepared by the ozone preparation unit in the mixing reactor; 2) feeding the flue gas oxidized with ozone into the scrubbing tower for spraying scrubbing, discharging out a clean flue gas after scrubbing, and discharging and recycling a waste liquid. The treatment system and the treatment method, disclosed by the invention, are stable and reliable to operate, high in treatment efficiency and low in energy consumption.

Description

technical field [0001] The invention relates to a treatment system for desulfurization and denitrification of flue gas and flue gas pollutants by using ozone and a corresponding treatment method, belonging to the technical field of environmental protection. Background technique [0002] The main source of flue gas pollutants is the combustion of fuels, including coal, coke, heavy oil, diesel, gas, natural gas, etc. The harmful substances produced with fuel combustion, such as: sulfur dioxide (SO 2 ), nitrogen oxides (NO x ), heavy metal mercury (Hg), etc., whose total amount is very large, if not treated, it will cause serious air pollution and environmental pollution, and endanger human health. [0003] Flue gas treatment is a complex process. From the perspective of technical economy and efficiency, the combined removal (purification) technology of multiple technologies is the future development direction. The use of low-temperature plasma technology to remove nitrogen ...

AI Technical Summary

Problems solved by technology

However, the cost of the ozone generator, the stability and reliability of the system, and the cost of producing ozone have restricted the further promotion of the process.

For example, most of the existing ozone-based denitrification systems use traditional tubular ozone generators. Due to their much-criticized drawbacks, this type of treatment system is basically an expensive, extensive, and unreliable system. does not meet practical needs

However, the ozone low-temperature oxidation denitrification process proposed by LoTOX mentioned above is difficult to meet the actual needs due to the complexity of the treatment objects (pollutants) and the differences between treatment methods (processes)

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