Four-air-flue pulverized coal burner for cement kiln

Abstract

The utility model relates to a four-air-channel pulverized coal burner used in a cement kiln, which mainly provides thermal energy for the firing of cement clinker. The nozzle is connected with the air duct; the nozzle is composed of a swirl wind inner nozzle, a pulverized coal inner nozzle, and an axial flow air outer cylinder, which are coaxially set from the inside to the outside; the air duct consists of a central air duct, The swirl air duct, the coal air duct and the axial air duct are composed of the swirl air inner nozzle, the pulverized coal inner nozzle and the axial air outer cylinder respectively pass through the swirl air duct, the coal air duct and the axial air duct The connecting pipe is axially sealed and connected, and the innermost layer is provided with a central air duct. The invention has high flame thermal strength, strong ejection capacity, long service life of nozzles, excellent adjustment and adaptability, high mixing rate of pulverized coal, swirling air and axial air, and can adapt to fluctuations in certain coal quality, including low-quality coal and high-intensity coal. The combustion of pulverized water and coal is complete, and the flame is complete and powerful.

Description

technical field [0001] The invention relates to the technical field of thermal equipment in the cement industry, in particular to a four-air duct pulverized coal burner for a cement kiln that provides thermal energy for firing cement clinker. Background technique [0002] From the invention of the first generation of burners used in cement rotary kilns to the present, with the change of fuel energy supply and people's gradual emphasis on environmental protection, the problems to be solved by cement kiln burners have changed accordingly. Put forward higher technical requirements. [0003] At present, affected by the current situation of fuel supply, the fuel used in cement kilns has low combustion efficiency, low volatile matter, high water content, large particles, etc., which cannot meet the requirements of comprehensive performance of the burner and the development trend of environmental protection. It is known that the combustion performance and environmental protection ...

AI Technical Summary

Problems solved by technology

The application practice shows that the above two structures have not achieved the expected use effect, the cement burner has a short life, the flame is not strong enough, and the environmental protection performance is not up to standard, and each air duct is equipped with an adjustment device, which makes the adjustment operation of the burner complicated.

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