烟气参数对细颗粒湍流聚并的影响

陈冬林; 杨陈好; 吴康; 刘经

doi:10.12030/j.cjee.201609226

环境工程学报

烟气参数对细颗粒湍流聚并的影响

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陈冬林, 杨陈好, 吴康, 刘经. 烟气参数对细颗粒湍流聚并的影响[J]. 环境工程学报, 2017, 11(9): 5084-5090. doi: 10.12030/j.cjee.201609226

引用本文:

陈冬林, 杨陈好, 吴康, 刘经. 烟气参数对细颗粒湍流聚并的影响[J]. 环境工程学报, 2017, 11(9): 5084-5090. doi: 10.12030/j.cjee.201609226

CHEN Donglin, YANG Chenhao, WU Kang, LIU Jing. Influences of turbulent agglomeration of fine particles under flue gas parameters[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5084-5090. doi: 10.12030/j.cjee.201609226

Citation:

CHEN Donglin, YANG Chenhao, WU Kang, LIU Jing. Influences of turbulent agglomeration of fine particles under flue gas parameters[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5084-5090. doi: 10.12030/j.cjee.201609226

烟气参数对细颗粒湍流聚并的影响

1.
长沙理工大学能源与动力工程学院, 能源高效清洁利用湖南省重点实验室, 长沙 410076
基金项目:
长沙市能源局重点扶持项目（3050402/2049）

长沙市工信委重点项目（3050402/2082）
中图分类号: X513

Influences of turbulent agglomeration of fine particles under flue gas parameters

1.
Key Laboratory of Efficient and Clean Energy Utilization of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410076, China
Fund Project:

摘要: 细颗粒湍流聚并技术是控制燃煤烟气中细颗粒排放的有效措施之一。为了研究烟气参数对湍流聚并效果的影响，在一种细颗粒湍流聚并器中分别对烟气流速、烟气温度、颗粒物浓度以及烟气含湿量进行实验测试。结果表明：烟气流速能显著增大聚并器内湍流强度，提高飞灰颗粒的聚并效率，烟气流速为16 m·s-1时，PM2.5聚并效率为44.51%；烟气温度在酸露点以上时，其对飞灰颗粒聚并效率的促进作用有限；颗粒物浓度越大，则烟道内单位体积的颗粒物数量越多，从而增加了颗粒间的碰撞概率，飞灰颗粒聚并效率明显提高，颗粒物浓度为35 mg·L-1时，PM2.5的聚并效率达到52.48%；烟气含湿量较低时对飞灰颗粒聚并过程影响不大。
- 细颗粒 /
- 湍流聚并 /
- 烟气流速 /
- 烟气温度 /
- 颗粒物浓度 /
- 烟气含湿量 /
- 粒径分布
Abstract: The turbulent agglomeration of fine particles is an effective method in the control of emissions of fine particles from coal-fired flue gas. The agglomeration of fine particles was studied with different flue gas parameters, including velocity, temperature, particle concentration and moisture content of the flue gas. The results show that turbulent intensity is significantly improved by increasing flue gas velocity, promoting the agglomeration rate of fly ash particles. When the flue gas velocity was 16 m·s-1, the agglomeration rate of PM2.5 was 44.51%. The flue gas temperature has a limited effect on the agglomeration rate of fine particles above the acid dew point. The higher concentration of particles, the greater number of particles per unit volume in flue. This increases the probability of collisions between particles, and improves the agglomeration rate of fly ash. With a particle concentration of 35 mg·L-1, the agglomeration rate of PM2.5 increased to 52.48%. The lower moisture content of flue gas has little effect on the agglomeration process of fly ash particles.
- fine particles /
- turbluent agglomeration /
- flue gas velocity /
- flue gas temperature /
- particle concentration /
- moisture content of flue gas /
- particle size distribution

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陈冬林, 杨陈好, 吴康, 刘经. 烟气参数对细颗粒湍流聚并的影响[J]. 环境工程学报, 2017, 11(9): 5084-5090. doi: 10.12030/j.cjee.201609226

引用本文:

陈冬林, 杨陈好, 吴康, 刘经. 烟气参数对细颗粒湍流聚并的影响[J]. 环境工程学报, 2017, 11(9): 5084-5090. doi: 10.12030/j.cjee.201609226

Citation:

烟气参数对细颗粒湍流聚并的影响

1. 长沙理工大学能源与动力工程学院, 能源高效清洁利用湖南省重点实验室, 长沙 410076

收稿日期: 2017-03-07

基金项目:

长沙市能源局重点扶持项目（3050402/2049）

长沙市工信委重点项目（3050402/2082）

关键词:

摘要: 细颗粒湍流聚并技术是控制燃煤烟气中细颗粒排放的有效措施之一。为了研究烟气参数对湍流聚并效果的影响，在一种细颗粒湍流聚并器中分别对烟气流速、烟气温度、颗粒物浓度以及烟气含湿量进行实验测试。结果表明：烟气流速能显著增大聚并器内湍流强度，提高飞灰颗粒的聚并效率，烟气流速为16 m·s-1时，PM2.5聚并效率为44.51%；烟气温度在酸露点以上时，其对飞灰颗粒聚并效率的促进作用有限；颗粒物浓度越大，则烟道内单位体积的颗粒物数量越多，从而增加了颗粒间的碰撞概率，飞灰颗粒聚并效率明显提高，颗粒物浓度为35 mg·L-1时，PM2.5的聚并效率达到52.48%；烟气含湿量较低时对飞灰颗粒聚并过程影响不大。

English Abstract

Influences of turbulent agglomeration of fine particles under flue gas parameters

1. Key Laboratory of Efficient and Clean Energy Utilization of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410076, China

Received Date: 2017-03-07

Fund Project:

Keywords:

Abstract: The turbulent agglomeration of fine particles is an effective method in the control of emissions of fine particles from coal-fired flue gas. The agglomeration of fine particles was studied with different flue gas parameters, including velocity, temperature, particle concentration and moisture content of the flue gas. The results show that turbulent intensity is significantly improved by increasing flue gas velocity, promoting the agglomeration rate of fly ash particles. When the flue gas velocity was 16 m·s-1, the agglomeration rate of PM2.5 was 44.51%. The flue gas temperature has a limited effect on the agglomeration rate of fine particles above the acid dew point. The higher concentration of particles, the greater number of particles per unit volume in flue. This increases the probability of collisions between particles, and improves the agglomeration rate of fly ash. With a particle concentration of 35 mg·L-1, the agglomeration rate of PM2.5 increased to 52.48%. The lower moisture content of flue gas has little effect on the agglomeration process of fly ash particles.