A nozzle device for ozone flue gas mixing system

Abstract

The invention discloses a spray nozzle device for an ozone and flue gas mixing system, which comprises a mixing main pipe and a plurality of spray nozzle components arranged on the mixing main pipe, wherein each spray nozzle component comprises an ozone spraying straight pipe, two upper ozone spraying inclined pipes and two lower ozone spraying inclined pipes; the axial line of the ozone spraying straight pipe is perpendicular to the axial line of the mixing main pipe; the end head of the ozone spraying straight pipe is provided with a center spray nozzle; the two upper ozone spraying inclined pipes are symmetrically arranged on the two sides of the ozone spraying straight pipe; the lower end of each upper ozone spraying inclined pipe is communicated with the ozone spraying straight pipe; the end head of the upper end of each upper ozone spraying inclined pipe is provided with a spray nozzle; the two lower ozone spraying inclined pipes are symmetrically arranged on the two sides of the ozone spraying straight pipe; the lower end of each lower ozone spraying inclined pipe is communicated with the ozone spraying straight pipe; the end head of the upper end of each lower ozone spraying inclined pipe is provided with a spray nozzle. In the spray nozzle device, the ozone pressure is stable; the spraying speed is uniform; ozone is sprayed into an outside space through five spraying pipes with different angles, so that the ozone is uniformly distributed in the outside space; the oxidation rate of nitrogen oxide of the ozone and flue gas mixing system is improved; the utilization rate of the ozone is improved.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a nozzle device used in an ozone flue gas mixing system. Background technique [0002] Based on China's severe air pollution situation and strict air pollutant emission standards, flue gas denitrification has become a necessary means of air pollutant control. Flue gas denitrification methods mainly include selective catalytic reduction (SCR) technology, selective non-catalytic reduction (SNCR) technology, SNCR / SCR combined flue gas denitrification technology, activated carbon absorption method, electron beam irradiation method and low temperature oxidation absorption method, etc. Among them, because the low-temperature oxidation absorption method has the characteristics of strong technical controllability, suitable for low-temperature industrial boilers, and high emission standards, the process has a good market prospect. The main principle of the low-temperature oxi...

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Problems solved by technology

[0005] Generally, the nozzle structure is simple, the injection angle is single, and it is sprayed directly from the top of the straight ozone spraying pipe. The speed of ozone spraying fluctuates greatly, and the disturbance effect on the flue gas is poor. The distribution of ozone after it is sprayed into the flue and the mixing with the flue gas It is not uniform, the velocity distribution deviation and the ozone concentration distribution deviation are relatively large, resulting in an unsatisfactory oxidation rate of nitrogen oxides and insufficient utilization of ozone

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