Air curtain protection L-shaped urea solution spray gun

Abstract

The invention discloses an air curtain protection L-shaped urea solution spray gun. The air curtain protection L-shaped urea solution spray gun comprises a protection air cap, an atomizing nozzle andan L-shaped conveying pipe connected with the atomizing nozzle. The L-shaped conveying pipe comprises a nozzle base, a protection air pipe, an atomization air pipe, a liquid pipe, a protection air channel, an atomization air channel and a liquid channel. The nozzle holder comprises a protective air channel, an atomizing air channel and a liquid channel which are concentrically arranged from outside to inside; the protective hood and the atomizing nozzle are both arranged on the nozzle seat; a protective air transmission channel is arranged between the inner wall of the protective air pipe andthe outer wall of the atomizing air pipe, wherein one end of the protective air transmission channel is communicated with the inner side of the protective air cap; an atomizing air transmission channel is arranged between the inner wall of the atomizing air pipe and the outer wall of the liquid pipe, wherein one end of the atomizing air transmission channel is communicated with a gas inlet of theatomizing nozzle, and one end of the liquid pipe is communicated with a liquid interface of the atomizing nozzle. According to the device, the influence of dust in smoke can be effectively resisted, and pipeline blockage caused by evaporation drying of liquid in the high-temperature environment in the conveying process is prevented.

Description

Technical field[0001]The invention belongs to the field of energy conservation and environmental protection, and relates to a urea solution spray gun, in particular to an air curtain protection L-type urea solution spray gun.Background technique[0002]In the field of SCR flue gas denitrification, the direct injection pyrolysis technology for ammonia production in the urea solution flue is the most energy-saving urea ammonia production method. The main principle is to use the grid method at the original AIG (ammonia injection grid) position of the SCR inlet flue. Arranged multiple spray guns spray the urea solution equally into the flue gas. Due to the high temperature and dusty flue gas environment, and the flue gas flows from bottom to top, the nozzle must be upward when spraying downstream. These restrictions cause many difficulties, and conventional spray guns cannot be used. Because the flow of urea solution at each injection point is extremely small, the urea solution is easy to...

AI Technical Summary

Problems solved by technology

Due to the high temperature and high dust flue gas environment, and the flue gas flows from bottom to top, the nozzle must face upward when spraying along the flow. These restrictions have caused many difficulties, and conventional spray guns cannot be used.

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