Pulverized coal fired boiler with wall-attachment secondary air and grid overfire air

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United States of America Patent

PATENT NO 9719677
APP PUB NO 20140308620A1
SERIAL NO

14357733

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Abstract

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The present invention relates to a pulverized coal fired boiler with wall-attachment secondary air and grid overfire air. Primary burners including primary air spouts, secondary air spouts and close coupled overfire air spouts arranged at intervals along the height direction of a hearth are arranged on four corners of the hearth. Two-way wall-attachment secondary air spouts and one-way wall-attachment secondary air spouts are arranged from bottom to top in a primary combustion zone where the primary burners are located. One-way wall-attachment secondary air spouts are arranged in a reduction zone between the primary burners and the top overfire air spouts, and grid overfire air spouts are arranged in a burnout zone where the overfire air is supplied. By adopting the pulverized coal fired boiler with wall-attachment secondary air and grid overfire air according to the present invention, the NO amount generated in the hearth is reduced, the NO reduction rate along a flame is improved, the coke burnout rate is improved, less coke which is not burnt out enters into the burnout zone, slagging on the water-cooled wall is reduced, and ultralow emission of NOx may be realized on the premise that the combustion efficiency is not reduced, slag is not agglomerated in the hearth and the flue gas temperature deviation is small.

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Patent Owner(s)

Patent OwnerAddress
YANTAI LONGYUAN POWER TECHNOLOGY CO LTD264006 NO 2 BAIYUNSHAN ROAD YANTAI ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE SHANDONG PROVINCE YANTAI CITY SHANDONG PROVINCE 264006

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cui, Jinlei Yan Tai, CN 1 2
Deng, Yuankai Yan Tai, CN 1 2
Hou, Bo Yan Tai, CN 11 27
Li, Lei Yan Tai, CN 645 4033
Li, Ming Yan Tai, CN 1285 14101
Rong, Weiguo Yan Tai, CN 1 2
Wei, Tanrong Yan Tai, CN 1 2
Xu, Guofeng Yan Tai, CN 105 1004
Zhang, Yonghe Yan-Tai, CN 4 3

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