Multi-medium multi-channel discrete low-NOx pulverized coal burner for rotary cement kiln

A pulverized coal burner and cement rotary kiln technology, which is applied in the direction of burners, lighting and heating equipment, etc., can solve the problem that NOx is difficult to meet environmental protection requirements, and achieve the requirements of reducing NOx generation, less primary air volume, and low NOx emissions Effect

Inactive Publication Date: 2009-10-14
SINOMA INT ENG
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the burners of the above three foreign companies can reduce NOx emissions, their NOx emissions are also difficult to meet the increasingly stringent environmental protection requirements

Method used

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  • Multi-medium multi-channel discrete low-NOx pulverized coal burner for rotary cement kiln
  • Multi-medium multi-channel discrete low-NOx pulverized coal burner for rotary cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] figure 1 , 2 Middle, 1-axial air duct; 2-swirling air duct; 3-coal air duct; 4-central air duct; 5-coal water slurry pipeline; 6-Rafal tube supersonic nozzle; 7-coal water slurry nozzle ;8-central wind distribution board

[0018] The cement rotary kiln low NOx pulverized coal burner is a multi-media multi-channel pulverized coal burner, which is composed of four concentric annular channels, which are axial flow air channel 1, swirl air channel 2, coal air channel 3 and A central wind passage 4, a coal water slurry pipeline 5 is set in the center, and a coal water slurry burner 7 is set at the outlet of the coal water slurry pipeline 5 . An air distribution plate 8 having 10 air outlet holes (circular holes) is arranged at the outlet of the central air passage.

[0019] The outermost axial-flow air duct has 10 to 40 Lafal tube supersonic nozzles 6 evenly distributed in the circumferential direction at its air outlet, which are discretely arranged at a certain angle wi...

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Abstract

The invention provides a low-NOx pulverized coal burner for a rotary cement kiln, which is characterized by effectively controllable NOx emission, low primary air volume, reasonable flame shape, flexible and convenient operation, wide regulation scope, strong coal quality adaptability, etc. The pulverized coal burner consists of four ring-shaped channels, namely an axial flow air channel (1), a rotational flow air channel (2), a coal air channel (3) and a central air channel (4) from outside to inside; the center of the burner is provided with a water-coal-slurry pipeline (5) and the outlet of the water-coal-slurry pipeline (5) is provided with a water-coal-slurry burner nozzle (7).

Description

technical field [0001] The invention relates to a low-NOx pulverized coal burner applied to a cement rotary kiln, which can effectively control the emission of NOx during the combustion of coal powder in the cement rotary kiln, and belongs to the technical field of special combustion equipment for the cement rotary kiln. technical background [0002] Pulverized coal combustion system is an indispensable key component in the production of new dry process cement industry, thermal power generation, metallurgy and other industries. During the combustion of pulverized coal, pollutant gases will be generated, among which nitrogen oxides (NOx for short) are the main pollutants. One of them, according to the statistical data in 2008, the total amount of NOx emissions in my country is about 20 million tons, of which the NOx emissions from the cement industry account for about 6%. With the continuous expansion of my country's economy, the NOx emissions are still With a growing trend, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D11/00F23D11/10F23D11/38
Inventor 丁苏东蔡玉良孙德群卢仁红潘浻朱忠民嵇磊吴建军宁建根于洋
Owner SINOMA INT ENG
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