湿法除尘技术进展及变温多相流脱除PM2.5的新方法

doi:10.3969/j.issn.0438-1157.2013.01.018

化工学报 ›› 2013, Vol. 64 ›› Issue (1): 155-164.DOI: 10.3969/j.issn.0438-1157.2013.01.018

湿法除尘技术进展及变温多相流脱除PM_2.5的新方法

朱家骅¹, 夏素兰¹, 魏文韫¹, 余徽¹, W. Höflinger²

1. 四川大学化工学院,四川成都 610065;
2. 维也纳技术大学,A-1060 Vienna,Austria

收稿日期:2012-06-21 修回日期:2012-08-09 出版日期:2013-01-05 发布日期:2013-01-05
通讯作者: 朱家骅
作者简介:朱家骅(1953—),男,教授,博士生导师。
基金资助:
国家自然科学基金项目(21276161);中央高校基本科研专项(2010SCU22008)。

PM_2.5 removal—advances in wet collection technologies and a novel approach through temperature swing multi-phase flow

ZHU Jiahua¹, XIA Sulan¹, WEI Wenyun¹, YU Hui¹, W. Höflinger²

1. School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China;
2. Vienna University of Technology, A-1060 Vienna, Austria

Received:2012-06-21 Revised:2012-08-09 Online:2013-01-05 Published:2013-01-05
Supported by:
supported by the National Natural Science Foundation of China (21276161) and Central University Fundamentals Research Plan (2010SCU22008).

摘要/Abstract

摘要： 分析对比了工业化国家应对工业增长控制PM_2.5排放的策略与技术措施,特别是荷兰在充分的技术经济性研究基础上制定50% PM减排目标、相当于9 mg·m^-3工业尾气颗粒物允许排放浓度标准,值得我国借鉴。工业源颗粒物排放占比前5的冶金、石油加工、化工、建材和食品加工业颗粒排放物呈现PM_1.0的粒度分布峰值特征,应首选湿法静电沉降类(Wet-ESP)减排技术,但其经济性未必适合我国大规模基础工业发展阶段。提出废气-废水多相交叉流阵列变温脱除PM_2.5的新方法,利用气流横掠液柱传热传质产生的速度场、温度场和浓度场推动微粒向气液界面运动,使所有单液柱均成为独立的PM_2.5分离单元,其串-并联组合结构使阵列具有很高的PM_2.5分离总效率。模型预测单元数n=200的交叉流阵列用于810kW大功率钻井柴油机(排气量4906 kg·h^-1干气)尾气碳烟PM_2.5减排的效率为91.4%,现场模型试验实测值略大于80%,理论与实践均表明该方法以废治废、经济可行。

关键词: PM_2.5减排, 湿法除尘, 技术进展, 变温多相流, 交叉流阵列

Abstract: Comparative analyses were made on the strategies and technologies adopted by the industrialized countries for PM_2.5 emissions control during industrial development period.It is particularly recommended for China to take the experiences of 50% PM emission reduction as the target set by the Netherlands based on sufficient investigations of cost-effective strategies, corresponding to a concentration limitation of 9 mg穖^-3 waste gas from industrial sources.The emitted particulate matters, from the five highest emitting sectors of basic metal, refineries, chemicals, building materials and food processing, present the peak characteristics of PM_1.0 size distribution.Correspondingly the prior technologies for emission reduction are considered to be wet electrostatic precipitators or Wet-ESP alike.However they may not be a cost-effective option for China presently during the stage of basic industrial development in large scale.A novel approach of PM_2.5 removal through a temperature swing array of waste-gas and waste-water multi-phase cross-flow was proposed, employing fields of velocity, temperature and concentration generated in gas phase by heat and mass transfer crossing water columns to drive micron-particle moving towards gas-liquid interfaces.Each single water column became an independent PM_2.5 collection unit, which was regularly arranged in a series-parallel structure possessing high total efficiency of PM_2.5 collection.An experiment set-up, consisting of a cross-flow array with unit number n=200, was examined in site of a drilling rig to collect soot PM_2.5 from exhausts (4906 kg穐^-1 dry mass) of a 810 kW heavy duty diesel.The total collection efficiency was 91.4% as the model predicted, while the measured efficiency was slightly over 80%.It was proven, both by theory and practice, this approach of "waste-employed waste treatment" is highly cost-effective.

Key words: PM_2.5 emission reduction, wet collection, technology advances, temperature swing multi-phase flow, cross-flow array

中图分类号:

朱家骅, 夏素兰, 魏文韫, 余徽, W. Höflinger. 湿法除尘技术进展及变温多相流脱除PM_2.5的新方法[J]. 化工学报, 2013, 64(1): 155-164.

ZHU Jiahua, XIA Sulan, WEI Wenyun, YU Hui, W. Höflinger. PM_2.5 removal—advances in wet collection technologies and a novel approach through temperature swing multi-phase flow[J]. CIESC Journal, 2013, 64(1): 155-164.

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湿法除尘技术进展及变温多相流脱除PM_2.5的新方法

PM_2.5 removal—advances in wet collection technologies and a novel approach through temperature swing multi-phase flow

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湿法除尘技术进展及变温多相流脱除PM2.5的新方法

PM2.5 removal—advances in wet collection technologies and a novel approach through temperature swing multi-phase flow

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湿法除尘技术进展及变温多相流脱除PM_2.5的新方法

PM_2.5 removal—advances in wet collection technologies and a novel approach through temperature swing multi-phase flow