Oxygen-enriched combustion process for improving cement kiln clinker calcining temperature and apparatus thereof

A technology of oxygen-enriched combustion and clinker calcination, which is applied in the field of oxygen-enriched combustion technology and its device to increase the calcination temperature of cement kiln clinker, which can solve the problems of affecting the quality of cement clinker and unstable temperature, so as to save coal consumption and reduce Labor cost, to ensure the effect of visualization
CN101407381AInactive Publication Date: 2009-04-15昆明阳光基业股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
昆明阳光基业股份有限公司
Publication Date
2009-04-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an oxygen-enriched combustion technical method for improving heating power of a cement kiln and a device thereof. During the process of cement clinker calcination, the invention is characterized in that: 1) a pure oxygen (over 90 percent) feeding device is added at a coal dust combustion zone of the cement kiln so as to lead the combustion zone to form a local thermonuclear area, and with the gradual diffusion of high temperature at the thermonuclear area, the heating power of the whole cement kiln is further improved and stably controlled; and 2) an oxygen feeding device is added at a combustion area of the cement kiln so as to improve and stably control the oxygen content in combustion air within the range of 21.8-33 percent at the combustion area. In a coal supplying system and an air supplying system of the cement kiln, an oxygen-enriched combustion system is formed by arranging at least one high temperature resistance oxygen jet, a pipeline for transmitting oxygen, an oxygen generation device, an oxygen supply-quantity regulating device, a DCS control device and the like inside each independent combustion area of the cement kiln. The invention has the advantages of improving combustion efficiency of faulty coal and the heating power of the cement kiln, and stabilizing thermal regulation of the kiln so as to enhance the quality of the cement and prolong the service life of various heating equipment of the cement kiln.
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Description

Technical field

[0001] The invention relates to a process method and a device for applying oxygen-enriched combustion technology to a cement kiln firing system. technical background

[0002] my country's cement output has ranked first in the world. In 2007, my country's cement output reached 1.354 billion tons, accounting for about 50% of global output, and new dry-process cement accounted for 53% of total cement output. New dry-process cement kilns have higher requirements for coal quality. Generally, the low-level calorific value of coal is required to be above 20934kj / kg, but my country's high-quality coal reserves are limited. There are fewer high-quality coal reserves in southern my country. Most of the coal has a low calorific value below 20934kj / kg. Increasing the excess air can not make it fully burned. On the contrary, it reduces the combustion temperature and fails to meet the requirements for calcination of cement clinker. By adopting oxyfuel combustion technology, low...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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