Efficient special SNCR denitration device for petrochemical industry

Abstract

The invention relates to an efficient special SNCR denitration device for the petrochemical industry. The device comprises a flue, a denitrfying agent system, a dilution water system, an air compression system and a cooling water system. Several SNCR denitration spray guns are arranged in the flue. The cooling water system and the air compression system are both connected to the SNCR denitration spray guns through distributors. The denitrfying agent system and the dilution water system are both connected to the SNCR denitration spray guns through a mixer and a denitrfying agent distributor. The SNCR denitration spray guns are penetrating-type, and each of the SNCR denitration spray guns is equipped with multiple nozzles. Thereby, spray cover area can be guaranteed, distribution of the denitrfying agent is uniform, the denitration efficiency is high, ammonia escape amount is less, and corrosion to rear equipment is effectively reduced. The SNCR denitration spray guns and casing pipes are sealingly fixed by a movable buckle method, which facilitates disassembly and assembly of the SNCR denitration spray guns. The casing pipes are filled with a thermal insulation material, thus reducing heat loss at holes of the casing pipes.

Description

technical field [0001] The invention relates to a high-efficiency SNCR denitrification device dedicated to the petrochemical industry, and belongs to the technical field of flue gas denitrification. Background technique [0002] The production process of the petrochemical industry will produce a large amount of nitrogen oxides and flue gas. Nitrogen oxides are very easy to pollute the environment. Nitrogen oxides mainly composed of nitrogen monoxide and nitrogen dioxide are an important reason for the formation of photochemical smog and acid rain. At the same time Nitrogen oxides are also an important source of photochemical smog, which has a characteristic odor, irritates eyes, harms plants, and can reduce atmospheric visibility. In view of the serious harmful effects of nitrogen oxides on the environment and human health, how to effectively eliminate nitrogen oxides is an important issue in environmental protection. At present, most nitrogen oxide treatment methods in the...

AI Technical Summary

Problems solved by technology

At present, most nitrogen oxide treatment methods in the petrochemical industry use SCR denitrification technology. Compared with SNCR denitrification technology, SCR denitrification has high construction and operation costs, and SCR denitrification is prone to produce SO 3 , with excess NH 3 Generate NH 4 HSO 4

NH 4 HSO 4 It is corrosive and viscous, which can cause damage to the tail flue equipment; at present, the domestic SNCR denitrification technology generally has low denitrification efficiency, the denitrification efficiency is lower than 65%, the amount of ammonia escape is large, the distribution of liquid ammonia injection is uneven, and the amount of ammonia escape is large. Follow-up equipment Serious corrosion and other problems

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