Experimental study on electrostatic removal of high-carbon particle in high temperature coal pyrolysis gas
Experimental study on electrostatic removal of high-carbon particle in high temperature coal pyrolysis gas
复制标题
静电去除高温煤热解气中高碳颗粒的实验研究
DOI：
10.1016/j.proci.2018.06.192
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发表时间：
2019
影响因子：
3.4
通讯作者：
Gao Xiang
中科院分区：
文献类型：
--
作者：
Zheng Chenghang;Liu Xintao;Xu Xi;Yan Pei;Chang Qianyun;Wang Yi;Gao Xiang
高温静电除尘器（ESP）是一种很好的热气体净化解决方案，它可以在高于焦油露点的温度下从热解气体中去除飞灰。本文研究了空气和模拟煤热解气中的负直流电晕放电特性。在300 ~ 900 K温度范围内，对煤热解炉飞灰（A灰）和燃煤电厂飞灰（B灰）在电除尘器中的脱除效果进行了对比研究。在相同放电电压和不同温度下，模拟气体的电流密度均高于空气。与空气相比，模拟气体具有更高的火花电压和更低的起始电压。在高温下，对于直径大于0.1 µm的颗粒，灰烬A的分级收集效率低于灰烬B。与空气相比，对于直径小于0.1 µm的颗粒，在模拟气体中获得较低的收集效率。模拟气体中亚微米颗粒的捕集效率通常高于空气中的捕集效率，尤其是对粒径小于0.04 µm的颗粒。在模拟气体中，灰A的总体捕集效率明显低于灰B，特别是在高温下。在300 ~ 700 K温度范围内，两种灰样的捕集效率均在93%以上，但在900 K温度范围内，模拟气体中灰A的捕集效率下降到78.7%。
A high-temperature electrostatic precipitator (ESP) presents a good solution for hot gas cleaning, which can remove fly ash from pyrolysis gas at temperatures higher than the tar dew point. In this paper, the characteristics of negative DC corona discharge in air and simulated coal pyrolysis gas were studied. The removal of coal pyrolysis furnace fly ash (ash A) was investigated and compared with that of coal-fired power plant fly ash (ash B) in ESP with a temperature ranging from 300 K to 900 K. The current density of simulated gas was higher than that of air under the same discharge voltage and at different temperatures. The simulated gas also had a higher spark voltage and a lower onset voltage compared with air. The fractional collection efficiency of ash A was lower for particles with diameters of larger than 0.1 µm at high temperature, compared with ash B. A lower collection efficiency in simulated gas was obtained for particles with diameters of less than 0.1 µm compared with air. The collection efficiency of submicron particles in simulated gas was usually higher than it in air, especially for particles with diameters of less than 0.04 µm. In simulated gas, the overall collection efficiency of ash A was obviously lower than that of ash B, especially at high temperature. From 300 K to 700 K, the collection efficiencies of both ash samples were as high as above 93%, but the collection efficiency of ash A in simulated gas decreased to 78.7% at 900 K.
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影响因子：
8.6
作者：
Yan, Pei;Zheng, Chenghang;Cen, Kefa
通讯作者：
Cen, Kefa
影响因子：
7.4
作者：
E. Shin;M. Hajaligol;F. Rasouli
通讯作者：
E. Shin;M. Hajaligol;F. Rasouli
热解气氛和温度对煤焦特性和气化反应活性的影响
影响因子：
3.8
作者：
Qinhui Wang;Rui Zhang;Zhongyang Luo;Mengxiang Fang;Kefa Cen
通讯作者：
Kefa Cen
DOI：
10.1016/j.proci.2012.07.080
发表时间：
2013
期刊：
--
影响因子：
--
作者：
Chang Wen;Minghou Xu;Dunxi Yu;C. Sheng;Hongwei Wu;Ping’an Zhang;Y. Qiao;H. Yao
通讯作者：
Chang Wen;Minghou Xu;Dunxi Yu;C. Sheng;Hongwei Wu;Ping’an Zhang;Y. Qiao;H. Yao
影响因子：
6
作者：
S. Bengtsson
通讯作者：
S. Bengtsson