Experimental study on lean oxygen combustion performance of lignite semi char in a cyclone chamber

LIU Yinhe; YUAN Chuntian; FAN Qiang; XU Shijin; CHE Defu; ZHANG Yong; ZHANG Yubin; YANG Tianliang; LI Gengda; LIU Hanqiang; GUO Hua

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Experimental study on lean oxygen combustion performance of lignite semi char in a cyclone chamber

Thermal Power Generation Vol. 46, Issue 1, Pages: 49-55(2017)

更新时间：2025-09-28

- Experimental study on lean oxygen combustion performance of lignite semi char in a cyclone chamber
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院
  2. 烟台龙源电力技术股份有限公司
  3. 国电新能源技术研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ534
- Published：2017
- 稿件说明：
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LIU Yinhe, YUAN Chuntian, FAN Qiang, et al. Experimental study on lean oxygen combustion performance of lignite semi char in a cyclone chamber[J]. Thermal Power Generation, 2017, 46(1): 49-55.
DOI：

LIU Yinhe, YUAN Chuntian, FAN Qiang, et al. Experimental study on lean oxygen combustion performance of lignite semi char in a cyclone chamber[J]. Thermal Power Generation, 2017, 46(1): 49-55. DOI：

摘要

在实验室规模的小型立式旋风筒中

对工业制备的内蒙古锡林浩特褐煤半焦的贫氧旋风燃烧特性进行了试验研究。结果表明:在过量空气系数为0.5~0.9时

贫氧燃烧产物的热值在1 500~3 500kJ/m3之间

且随着过量空气系数的增加而降低;随着过量空气系数增加

半焦燃烧碳转化率增高

当过量空气系数0.6时

半焦燃烧碳转化率97%

炉内燃烧区温度升高

在过量空气系数为0.7时

燃烧区温度可达1 280℃

高于灰熔点

这对保证液态排渣非常关键;给料量增加对半焦燃烧特性影响不大

表明旋风筒燃烧室对燃烧褐煤半焦具有良好的负荷调节特性;贫氧燃烧条件下

旋风筒NO的排放质量浓度较低

随着过量空气系数和给料量的增加

旋风筒NO的排放质量浓度提高。

Abstract

The combustion characteristics of semi char made from Xilinhaote lignite were experimentally studied in a cyclone chamber in lean oxygen atmosphere.The influencing factors such as excess air coefficient and burning load were studied.The results show that

the calorific value of the combustion products was 1.5 MJ/m3 to 3.5MJ/m3 with excess air coefficient from 0.5to 0.9

and it decreased with the increasing excess air coefficient.The carbon conversion of the semi char increased with the excess air coefficient

it reached up to 97% when the excess air coefficient was higher than 0.6.The temperature at main burning zone rose with the excess air coefficient

it reached 1 280 ℃ when the excess air coefficient was 0.7

which was higher than the fluid temperature of the semi char ash

this can ensure the liquid slag discharge.The feeding rate had little influence on combustion characteristics of the semi char

indicating the cyclone chamber had a good performance of load regulation.Under lean oxygen conditions

the NO emission from cyclone combustor was low and it increased with both the excess air coefficient and the char feeding rate.

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