Abrasion proof, vortex street strong mixing equipment in grille of spraying ammonia

Abstract

An antiwear eddy mixer for the ammonia spraying grate used for denitrating the fume of boiler (or incinerator or diesel engine) by selective catalytic reduction (SCR) method has several ammonia spraying tubes, which is arranged in flue and has a top end connected to the trunk of ammonia-air mixture, a lower blind end, several ammonia spraying holes, and an antiwear vortex element.

Description

technical field [0001] The invention relates to an anti-wear and enhanced disturbance mixing device for an ammonia injection grid used in a selective catalytic reduction (SCR) flue gas denitrification device of a thermal power generation unit boiler, a garbage incineration device, and a diesel engine, which belongs to the technology of environmental protection equipment field. Background technique [0002] Selective catalytic reduction is the most common and effective method for removing nitrogen oxides from boiler tail gas, and is widely used in various industrial devices. The main principle is to use liquid ammonia or ammonia water as a reducing agent, mix it with air and spray it into the flue upstream of the SCR reactor, and react with nitrogen oxides in the flue gas under the action of a catalyst to generate harmless nitrogen and Water drain system. Among them, the mixing and distribution effect of ammonia and nitrogen oxides is one of the key factors affecting the ef...

AI Technical Summary

Problems solved by technology

Since the flue gas contains a considerable concentration of dust, the wear of the ammonia injection grid tube bundle is a problem worthy of attention. In severe cases, it can affect the distribution of ammonia and flue gas and affect the denitrification efficiency

At the same time, purely relying on the spontaneous diffusion of flue gas and ammonia, the disturbance is too weak, the mixing effect is poor, and the required mixing distance is too long

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