SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment

Abstract

The invention discloses an SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment, comprising a spray gun spray pipe, a sleeve which is sheathed on the spray gun spray pipe and a reducing agent inlet pipe, wherein the spray gun spray pipe is communicated with the reducing agent inlet pipe. The SNCR denitration automatic anti-blocking spray atomization spray gun device for smoke environment is characterized in that a ring-shaped dustproof plate is arranged between the sleeve and the spray gun spray pipe; the ring-shaped dustproof plate is located at a nozzle end of the spray gun spray pipe; a plurality of air holes are arranged on the ring-shaped dustproof plate; an air inlet pipe which is used for introducing compressed air from an air source is arranged on the sleeve; and the air holes are arranged on the ring-shaped dustproof plate in a circumferential equal manner. The SNCR denitration automatic anti-blocking spray atomization spray gun device for smoke environment is good in anti-blocking effect, simple in structure and easy for implementation.

Description

technical field [0001] The invention belongs to the technical field of flue gas nitrogen oxide emission reduction (denitration) and relates to an SNCR denitrification automatic anti-blocking injection atomization spray gun device used in a smoke and dust environment. Background technique [0002] The Selective Non-Catalytic Reduction (SNCR) denitrification process is a world-recognized mature technology for high-temperature flue gas denitrification. It has been introduced from abroad in recent years and has been widely used in high-temperature flue gas denitrification projects such as power plant boilers and cement plants. The key technology is to install a spray gun at a specific position on the furnace wall of the boiler (kiln), and spray the denitrification reducing agent into the furnace and the nitrogen oxides (NO and NO) in the flue gas. 2 ) for selective non-catalytic reduction reaction, NO and NO 2 converted to N 2 and H 2 O. The decisive factor of the reaction i...

AI Technical Summary

Problems solved by technology

After using this device for a period of time, it is very easy to accumulate dust in the casing. The dusty airflow in the furnace will bring the material dust into the casing and deposit it. Moreover, the larger particle materials will easily enter the casing with the airflow and get stuck between the spray gun and the casing. In the annular gap between, the plugging of the casing is faster

The clogging and hardening will continue to increase, which will hinder and eventually lead to nozzle clogging, reduce the quality of atomization, and affect the mixing effect of reducing agent and flue gas, thereby reducing the denitrification efficiency

Moreover, after the inner casing is hardened, it is difficult to pull out the spray gun, and it is difficult to carry out inspection and maintenance, which affects long-term stable operation

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