Carbon-based catalyst desulfurization and denitrification system and method

Abstract

The invention provides a carbon-based catalyst desulfurization and denitrification system and method. The carbon-based catalyst desulfurization and denitrification system comprises a fume system (A), a desulfuration adsorption system (B), a denitrification adsorption system (C), a carbon-based catalyst conveyer system (E), a nitrogen system (F), an ammonia gasification dilution system (G), a cooling water system (I), a carbon-based catalyst regeneration system (D) and an air heating system (H), wherein all the systems are connected through a pipeline. Boiler fume enters a chimney to be discharged after reaching the standard by being processed through the carbon-based catalyst desulfurization and denitrification system, the adsorbed carbon-based catalyst is heated, desorbed and regenerated and then returns to an adsorption tower, and high-concentration SO2 obtained through desorption is used for resource recovery. According to the system, SO2 and NOx are removed through two-stage movement adsorption, adaptability to the fume condition characterized in high sulfur content, variable sulfur content and large fume amount change is high, and the foundation can be laid for large-scale application and popularization of the carbon-based catalyst fume purification technique in the thermal power industry.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a boiler flue gas combined desulfurization and denitrification system and method using a carbon-based catalyst as an adsorbent and a catalyst. Background technique [0002] The principle of carbon-based catalyst flue gas desulfurization and denitrification technology is: under the adsorption and catalytic action of flue gas on carbon-based catalyst, the SO in flue gas 2 and O 2 and H 2 0 reacts to form H 2 SO 4 , H 2 SO 4 Adsorbed on the surface of the carbon-based catalyst; at the same time, using the catalytic performance of the carbon-based catalyst, NOx in the flue gas undergoes a catalytic reduction reaction with ammonia to form N 2 , to achieve desulfurization and denitrification of flue gas. The carbon-based catalyst after the adsorption catalytic reaction is regenerated and recycled. [0003] There are many systematic methods for flue gas des...

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Problems solved by technology

[0004] 1. The existing carbon-based catalyst (such as activated coke) desulfurization and denitrification systems are mostly designed for flue gas conditions with relatively specific flow and concentration, and the adjustment of carbon-based catalyst materials when the flue gas flow and pollutant concentration changes greatly or quickly It is difficult or the material is prone to greater wear

[0005] 2. When SO 2 When the concentration of NOx and NOx is high, the low-concentration emission of the two pollutants cannot be achieved by using a single tower arrangement

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