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Swirl pulverized coal burner

A pulverized coal burner and pulverized coal technology are used in burners, burners for burning powder fuel, combustion methods, etc., which can solve problems such as unstable coal quality, achieve enhanced ignition stability, wide application range, and reduce oxygen. effect of concentration

Active Publication Date: 2014-03-12
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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Problems solved by technology

In addition, with the increasingly wide range of coal sources in power plants, the quality of coal is becoming more and more unstable, and the existing double-air swirl pulverized coal burners still need to be further improved in terms of stable combustion

Method used

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  • Swirl pulverized coal burner

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[0019] The present invention will be further described below in conjunction with specific examples.

[0020] All features disclosed in this specification, or steps in all disclosed methods or processes, except for mutually exclusive characteristics and / or steps, can be combined in any way, unless otherwise stated, they can be used by other equivalent or similar Instead, each feature is intended to be replaced by alternative features, that is, each feature is only one embodiment of a series of equivalent or similar features unless stated otherwise.

[0021] Such as figure 1 As shown, the swirl pulverized coal burner of the present invention includes a central air passage 10, a primary air passage 11, a secondary air passage 12 and a tertiary air passage 13 arranged in sequence from inside to outside, and is arranged along the central axis in the central air passage 10 An oil gun tube 1 with an oil nozzle, and a combustion stabilization cover 2 is provided at the air outlet of ...

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Abstract

The invention discloses a swirl pulverized coal burner which comprises a central wind channel, a primary wind channel, a secondary wind channel and a tertiary wind channel. An oil gun pipe with an oil nozzle is arranged in the central wind channel, a combustion stabilizing cover is arranged on the wind outlet of the central wind channel, a pulverized coal inspissator is arranged in the primary wind channel, and secondary wind swirl vanes are arranged in the secondary wind channel. A secondary wind separating layer is arranged between the secondary wind channel and the primary wind channel. Primary wind blocking blocks dividing pulverized coal airflow into multiple channels to be sprayed out are evenly distributed on the wind outlet of the primary wind channel in the peripheral direction, secondary wind blocking blocks with guide rods are evenly distributed on the wind outlet of the secondary wind channel in the circumferential direction, and tertiary wind blocking blocks with guide rods are evenly distributed on the wind outlet of the tertiary wind channel in the circumferential direction. The swirl pulverized coal burner can reduce the discharge value of combustion pollutants (NOx), improve adaptability on changes of types of coal, and enhance combustion stability, and the application range of the swirl pulverized coal burner is wide.

Description

technical field [0001] The invention relates to a burner, in particular to a swirl pulverized coal burner, and belongs to the technical field of boiler burners. [0002] Background technique [0003] The swirl burner is a device for burning pulverized coal that is widely used in power plant boilers and industrial boilers. At present, the main form of the swirl burner is the double-air swirl pulverized coal burner. The dual air swirl pulverized coal burner is mainly composed of central air, primary air, secondary air and tertiary air. With the continuous improvement of environmental protection requirements in recent years, it has become more and more urgent to reduce the emission of nitrogen oxides from pulverized coal burners. The existing double-air swirl pulverized coal burners still need to improve the emission of nitrogen oxides. In addition, with the increasingly wide range of coal sources in power plants, the quality of coal is becoming more and more unstable, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D1/02F23L9/00
Inventor 刘泰生杨章宁谢佳张山鹰但家瑜李季梅
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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