Eddy-current opposite-impacting type gas mixer arranged in gas passage

Abstract

The invention discloses an eddy-current opposite-impacting type gas mixer arranged in a gas passage. The eddy-current opposite-impacting type gas mixer is characterized by comprising a flow guide device, a nozzle, a pipeline, a flue gas turbulence device and a support device, wherein the pipeline penetrates through the side wall of a gas duct and continuously extends; the nozzle is arranged at one end of the pipeline in the extending direction; jet ejected out from the nozzle is sprayed on the flow guide device; the flue gas turbulence device is arranged at the upstream position of a flue gas flow of the flow guide device, and works with the flow guide device to enable the flue gas flow to form a horseshoe-shaped eddy current to wrap an airflow formed by the flow guide of the flow guide device after the flue gas flow passes the flue gas turbulence device. According to the mixer, a special structure of the mixed components is utilized to disorder a fluid field, the flue gas flow passes through a surface plate to form the horseshoe-shaped eddy current on the back of the surface plate, a reducing agent is ejected out from the nozzle to form the jet, the jet and the horseshoe-shaped eddy of the flue gas flow form opposite compact after the jet is guided by a reducing agent flow guide part, and the horseshoe-shaped eddy wraps the reduced gas flow from up to bottom to form the mixing of the horseshoe-shaped eddy and the gas flow.

Description

technical field [0001] The invention relates to a vortex counter-type gas mixer arranged in a gas channel, which belongs to the field of gas static mixers. Background technique [0002] Selective catalytic reduction (SCR) is currently the most important denitrification technology in industry. It is widely used in ships, motor vehicles, thermal power plants and other fields. The combustion of engines or boilers produces nitrogen oxides NO x , These gases discharged into the atmosphere will bring acid rain, photochemical smog, ozone layer depletion and other hazards, affecting human life. In recent years, the emission standards of air pollutants have become increasingly stringent. In terms of thermal power plants, the country requires the transformation of active units without denitrification equipment, that is, to install SCR systems between the economizer and the air preheater. Due to the limitations of the renovation space and site, the renovation will cause insufficient ...

AI Technical Summary

Problems solved by technology

With efficient mixing, the pressure drop of the system will also increase, resulting in an increase in the power consumption of the induced draft fan. Therefore, it is an important issue to design an efficient mixer and reasonably balance economical and environmental issues.

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