System and method for heat treating air dispersible feedstocks

By introducing a hot gas flow into the duct and adding fuel and oxygen-enriched gas in the processing area, and by using an open-loop/closed-loop control system to regulate the amount of oxygen and fuel, the problem of heat output fluctuation in the calcining furnace was solved, and stable operation and efficient combustion of the calcining furnace were achieved.

CN116888086BActive Publication Date: 2026-07-10THYSSENKRUPP POLYTHEUS GMBH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THYSSENKRUPP POLYTHEUS GMBH
Filing Date
2022-02-04
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing technologies, the heat output of calcining furnaces fluctuates greatly, resulting in limited effectiveness of the calcining furnaces and difficulty in effectively controlling combustion and heat output.

Method used

By introducing a hot gas flow into the duct and adding fuel and oxygen-enriched gas in the processing area, the amount of oxygen and fuel is regulated by an open-loop/closed-loop control system to stabilize the heat output of the calcining furnace.

Benefits of technology

It has achieved stable heat output of the calcining furnace, expanded the operating range of the calcining furnace, and improved the accuracy of combustion and heat control.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a method for heat-treating an air-dispersible raw material (48), in particular cement raw meal and / or mineral products, wherein the raw material (48) is introduced into a duct (32) through which a hot gas flows and subjected to heat treatment by the hot gas (52) and / or radiation heat in the duct (32), at least part of the fuel (36) is converted in a treatment zone (28), and the heat generated in the treatment zone (28) is at least partially supplied to the duct (32), and an oxygen-rich gas (68) is introduced into the treatment zone (28), wherein the oxygen content and / or the gas temperature in the hot gas (52) is determined, and the amount of oxygen introduced into the treatment zone (28) is controlled / regulated in dependence on the determined temperature and / or oxygen content.
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