W形火焰锅炉粉量均匀性优化特性研究

华电技术 ›› 2018, Vol. 40 ›› Issue (1): 5-9.

W形火焰锅炉粉量均匀性优化特性研究

中国大唐集团科学技术研究院有限公司西北分公司，西安〓710065

出版日期:2018-01-25 发布日期:2018-02-07

Study on characteristics of uniformity optimization on pulverized coal flow in a Wflame boiler

China Datang Corporation Science and Technology Research Institute Northwest Branch, Xi’an 710065, China

Online:2018-01-25 Published:2018-02-07

摘要/Abstract

摘要：

研究了指爪挡板对一次风管粉量的调节特性，通过调整指爪挡板，优化粉量均匀性，降低粉量偏差后，炉膛中心温度下降了近40℃，省煤器出口烟道中间区域烟温偏差下降了10.67℃，省煤器出口氧量偏差下降了1.16%，NOx体积浓度下降了16.79μL/L。同时，解决了再热器管壁超温问题，所有燃烧器喷嘴能够正常投运。粉量均匀优化后有利于减轻火焰偏斜、炉膛热负荷和汽温偏差，降低高温腐蚀和爆管的可能。炉膛中心温度的降低，以及沿炉膛宽度方向各燃烧器燃烧更加均匀，使得风粉配合更加合理，有利于降低NOx生成，改善了炉内(尤其是炉膛中部)的燃烧状况。

关键词:

">">W形火焰, 锅炉, 挡板, 粉量分配器, 一次风管, 粉量均匀性, 省煤器, 再热器

Abstract:

It explored the regulating characteristics of baffle plate to pulverized coal flow in primary air pipe. By adjusting the baffle plate, the deviation of pulverized coal flow decreased and uniformity of pulverized coal flow was optimized. The temperature of furnace center reduced nearly 40 degrees Celsius, the temperature deviation in the middle region of economizer outlet reduced 10.67 degrees Celsius, the oxygen deviation at economizer outlet reduced 1.16%, the emissions of NOx reduced 16.79μL/L. All burners was running smoothly and over temperature problem on reheater tube was solved. It showed that uniformity optimization of pulverized coal flow was good for reducing deviation of flame, furnace heat load and steam temperature and possibility of high temperature corrosion and cracking accidents. Reducing temperature at furnace center and stable combustion made reasonable air supply and stable combustion along the furnace width will make the cooperation of wind and powder more reasonable, which can reduce NOx generation and improves the combustion condition of the furnace (especially in the middle of the furnace)

Key words:

Wflame, boiler, baffle plate, powder distributor, primary air pipe, uniformity on pulverized coal flow, economizer, reheater

武岳. W形火焰锅炉粉量均匀性优化特性研究[J]. 华电技术, 2018, 40(1): 5-9.

WU Yue.

Study on characteristics of uniformity optimization on pulverized coal flow in a Wflame boiler

[J]. Huadian Technology, 2018, 40(1): 5-9.

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