Four-air-flue pulverized coal burner for cement kiln

Abstract

A four-air-flue pulverized coal burner for a cement kiln is mainly used for supplying heat energy for firing of cement clinker. A spray head is connected with an air hose; the spray head is composed of a swirling wind internal spray head body, a pulverized coal internal spray head body and an axial-flow wind external cylinder which are installed coaxially in a sleeved mode from inside to outside;the air hose is composed of a center wind air hose body, a swirling wind air hose body, a coal wind air hose body and an axial-flow wind air hose body which are coaxially mounted in a sleeved mode from inside to outside; and the swirling wind internal spray head body, the pulverized coal internal spray head body and the axial-flow wind external cylinder are in axial and sealed connection with theswirling wind air hose body, the coal wind air hose body and the axial-flow wind air hose body through connection pipes, the center wind air hose body is arranged in the innermost layer, and four airflues of an axial-flow wind air flue, a coal wind air flue, a swirling wind air flue and a center wind air flue are formed correspondingly after sleeved installation layer by layer. The four-air-fluepulverized coal burner is high in flame heating power intensity and high in material jacking capability, the service life of the spray head is long, the adjusting adaptability is excellent, the ratioof mixing of the pulverized coal and the swirling wind and the axial-flow wind is high, fluctuation of the certain coal quality can be adapted, burning of fault coal and high internal water pulverizedcoal is included, burning is conducted sufficiently, 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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