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Cement clinker preparation method and system

A technology for cement clinker and preparation system, which is applied in the field of building materials, can solve the problems of increasing production heat consumption, affecting clinker calcination, and decreasing fuel combustion efficiency, and achieves the effects of improving combustion efficiency, product quality, and calcination efficiency.

Active Publication Date: 2019-11-15
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction of the secondary air makes the fuel in the rotary kiln unable to burn quickly and fully, and the fuel combustion efficiency decreases, which will inevitably affect the quality and heat consumption of clinker calcination.
[0004] In order to reduce crust clogging, the cost of replacing low-quality raw materials with high content of alkali, chlorine, and sulfur is often very high; in order to increase the ventilation volume in the kiln, simply increasing the air volume of the high-temperature fan will often damage the original material of the kiln. , wind, and coal balance, improper handling will easily increase production heat consumption, and at present, the high-temperature fans of many enterprises have no additional potential for drawing wind; changing the grate plate structure of the grate cooler or replacing the cooling fan has a greater risk, and improper handling may easily lead to mature The cooling efficiency of the material decreases, and the temperature of the second and third air is reduced, which affects the calcination of the clinker

Method used

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  • Cement clinker preparation method and system
  • Cement clinker preparation method and system
  • Cement clinker preparation method and system

Examples

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preparation example Construction

[0036] The embodiment of the present invention provides a method for preparing cement clinker, which is a method of sending cement preheated and pre-decomposed raw meal into a rotary kiln and cooling it through a grate cooler to produce cement clinker. Or add water to the first section of the grate bed of the grate cooler, and the vaporized and decomposed product of the water enters the rotary kiln for burning cement clinker.

[0037] What is to be explained here is: atomized water vaporizes and decomposes rapidly at high temperature, and the vaporization and decomposition products of water can quickly participate in the combustion reaction of fuel and improve the combustion efficiency of fuel, thereby improving the calcination efficiency of clinker in the rotary kiln and improving the product quality. quality.

[0038] The above scheme can realize the preparation of cement clinker and improve the combustion efficiency in the rotary kiln. On this basis, the preferred scheme is...

Embodiment 1

[0070] The embodiment of the present invention provides a cement clinker preparation system, figure 1 It is a schematic structural diagram of the cement clinker preparation system in this embodiment, as figure 1 As shown, the system includes a rotary kiln 1 and a grate cooler 2, the rotary kiln 1 includes a kiln head cover 8, a burner 9 is provided inside the kiln head cover 8, and a water adding device 3 is provided on the side of the kiln head cover 8, which is used Add water to the kiln hood;

[0071] What should be explained here is that there is no limit to what kind of water adding device to choose. The atomization spray gun is preferred. The atomized water vaporizes and decomposes rapidly at high temperature, and the vaporization and decomposition products of water can quickly participate in the combustion reaction of fuel, improving Improve the combustion efficiency of fuel, thereby improving the calcination efficiency of clinker in the rotary kiln and improving produ...

Embodiment 2

[0080] The difference with Embodiment 1 is that the atomizing spray gun of the present embodiment is arranged on the top of a section of the fixed bed of the grate cooler, figure 2 It is a schematic structural diagram of the cement clinker preparation system of this embodiment, as figure 2 As shown, the system includes a rotary kiln 1 and a grate cooler 2. The grate cooler 2 includes a first stage 201 of a grate cooler, a second stage 202 of a grate cooler, and a third stage 203 of a grate cooler. The rotary kiln 1 includes a kiln head cover 8. The inside of the head cover 8 is provided with a burner 9, and an atomizing spray gun 3 is also provided on the fixed bed of the first section of the grate cooler, which is used to add water to the fixed bed;

[0081] It should be explained here that the atomized water vaporizes and decomposes rapidly at high temperature, and the vaporization and decomposition products of water can quickly participate in the combustion reaction of fu...

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Abstract

The invention discloses a preparation method and system for a cement clinker, and belongs to the field of building materials, wherein the preparation method of the cement clinker provided by the invention is a method for delivering a preheated and pre-decomposed cement raw material into a rotary kiln, and cooling the cement raw material by virtue of a grate cooler, so as to generate the cement clinker, water is added into a kiln head hood and / or a section of a grate bed of the grate cooler, and a product of the water after vaporization and decomposition enters the rotary kiln and is used for firing the cement clinker. The preparation method and system for the cement clinker, provided by the invention, can effectively improve the combustion efficiency of the rotary kiln.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method and system for preparing cement clinker. Background technique [0002] Rotary kiln is an important thermal equipment for cement calcination. In the existing new dry process cement technology, about 40% of the fuel is still burned in the rotary kiln, and the final firing process of cement clinker is still completed in the rotary kiln. Therefore, the combustion efficiency of fuel in cement rotary kiln directly affects the output, quality, heat consumption, air pollutant emission and equipment operation rate of cement clinker. [0003] In recent years, with the reduction of high-quality raw materials for cement calcination and the large amount of industrial waste used by enterprises in order to reduce production costs, these low-quality raw materials or industrial waste with high alkali, chlorine, sulfur and other harmful elements have promoted The skinning and clogging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/47C04B7/44
CPCC04B7/4415C04B7/47
Inventor 王俊杰汪澜
Owner CHINA BUILDING MATERIALS ACAD
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