Cement decomposing furnace and method for accelerating mixing of smoke in furnace by using cement decomposing furnace

Abstract

The invention discloses a cement decomposing furnace. The cement decomposing furnace comprises a furnace body and a ternary wind pipe; and the ternary wind pipe is connected to the furnace body. The cement decomposing furnace further comprises an ejector connected to the furnace body and used for providing mixed gas into the furnace body; the ejector mainly consists of a nozzle, a gas leading chamber, a mixing pipe and a dispersing pipe; a first pipe is connected to the ejector and the ternary wind pipe; a second pipe is connected to the nozzle and used for providing gas to the ejector; the ejector is used for conveying the gas into the furnace body after mixing; and in the vertical direction, the connected position of the ejector with the furnace body is higher than the connected positionof the ternary wind pipe with the furnace body. The invention further provides a method for accelerating mixing of smoke in the furnace by adopting the cement decomposing furnace. The decomposing furnace and the method greatly improve the mixing effect of the smoke in the decomposing furnace, and accelerate the mass transfer, heat transfer and chemical reactions of all components of the smoke.

Description

technical field [0001] The invention relates to a device for a cement industrial kiln, in particular to a cement decomposition furnace and a method for promoting the mixing of flue gas in the furnace by using the same. Background technique [0002] In the production of cement industry, the online calciner is commonly used at present. The flue gas from the kiln tail is sprayed into the calciner from the bottom of the calciner, and the tertiary air introduced from the kiln head enters the furnace through the lower cone of the calciner. After the hot raw material is dispersed, it enters the lower part of the decomposition furnace body through one or more points, and the fuel enters the furnace body through pneumatic conveying. After a series of actions such as dispersion, mixing, combustion, decomposition, and transportation of materials and fuels in the calciner, the decomposed raw meal is discharged from the outlet of the calciner together with the hot flue gas. [0003] Due...

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Problems solved by technology

A large amount of cold air is sprayed into the calciner in the form of high-pressure air blast. Although it will not increase its resistance loss, blowing too much cold air will inevitably reduce the temperature of the calciner and affect the processes of fuel combustion and raw meal decomposition.

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