Semi-dry flue gas purification system and method based on carbon material oxidative denitration

Abstract

The invention discloses a semi-dry flue gas purification system and method based on carbon material oxidative denitration. The semi-dry flue gas purification system based on the carbon material oxidative denitration includes a desulfurization reactor, a dust removal unit, a spent absorbent storage, activation and humidification unit, and a denitration reactor; the outlet of the desulfurization reactor and the dust removal unit are connected; the flue gas outlet of the dust removal unit is connected with the denitrification reactor; the outlet of the denitration reactor is connected in turn with an induced draft fan and a chimney; the outlet of a dust hopper of the dust removal unit is connected with the spent absorbent storage, activation and humidification unit. The semi-dry flue gas purification system realizes the coupling of denitrification, desulfurization and dust removal technologies, and has the advantages of compact equipment and small floor area. A semi-dry method is used, water consumption is small, and the final product is solid. Waste water is not needed. The process is simple and can be widely used in the process of industrial flue gas treatment.

Description

technical field [0001] The invention relates to a flue gas purification device and method thereof, in particular to a semi-dry flue gas purification system and method based on oxidation and denitrification of carbon materials. Background technique [0002] At present, SCR is the most widely used flue gas denitrification technology in the industry. The reaction temperature of high-temperature catalysts is required to be around 350°C, and it needs to be arranged before dust removal and desulfurization. High-sulfur and high-dust flue gas has a great negative effect on the activity and service life of the catalyst. The low-temperature SCR process puts denitrification after desulfurization and dust removal, but the reaction temperature is generally above 150°C, and the temperature of the flue gas after desulfurization is generally below 70°C, which requires that the flue gas needs to be reheated before denitrification. In addition, the SCR denitrification method uses NH 3 As a r...

AI Technical Summary

Problems solved by technology

In addition, the SCR denitrification method uses NH 3 As a reducing agent, ammonia gas is a dangerous product, and there are certain safety hazards in the process of transportation and storage, and there is also NH in the process of denitrification. 3 escape problem

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