Active coke combined desulfurization and denitrification system and method based on pre-oxidation

Abstract

The invention provides an active coke combined desulfurization and denitrification system and method based on pre-oxidation. The system comprises a pre-oxidation system arranged on a flue, an absorption system and a chimney, wherein the absorption system and the chimney are sequentially arranged at an outlet of the flue; wherein the pre-oxidation system comprises an H2O2 storage tank and an ultrasonic atomizer which are connected in sequence, and a compressed gas tank connected with an inlet of the ultrasonic atomizer, and an outlet of the ultrasonic atomizer is connected into the flue; the absorption system comprises an absorption tower; wherein the absorption tower adopts a sectional cross-flow flue gas purification adsorption tower, and comprises a gas outlet chamber and a gas inlet chamber which are isolated up and down, and a middle gas chamber communicating with the gas outlet chamber and the gas inlet chamber from the middle; active coke is arranged in the adsorbent layer forming the middle gas chamber, the lower section corresponding to the gas inlet chamber is a desulfurization section, the upper section corresponding to the gas outlet chamber is a denitration section, andan ammonia spraying device is arranged in the middle gas chamber; a gas inlet chamber of the absorption tower is connected with a flue outlet and the gas outlet chamber of the absorption tower is connected with the chimney.

Description

Technical field [0001] The invention relates to the field of flue gas purification for comprehensive treatment of waste gas from industries such as coal-fired power plants, steel sintering machines, industrial boilers, biomass power plants, garbage incineration plants, etc., and specifically relates to an activated coke combined desulfurization and denitration system based on pre-oxidation and method. Background technique [0002] More than 95% of large-scale coal-fired units in my country have achieved ultra-low emissions, but the treatment process is single, the operating cost is high, and they are facing urgent transformation needs. Integrated removal and resource utilization are the direction of future development. Compared with the pollution control of the power industry, the non-electric industry has a wide distribution of pollutant emissions, small flue gas volume, complex flue gas conditions, and difficult treatment. Integrated removal and low-temperature denitrification ...

AI Technical Summary

Problems solved by technology

But in H 2 o 2 In the NO oxidation process, compressed atomization is often used to spray NO into the flue to oxidize NO. The oxidation efficiency of this process is low, generally less than 60%.

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