REMOVAL OF FINE PARTICLES FROM COAL COMBUSTION WITH CHEMICAL AGGLOMERATION AGENTS

ZHU Hong-tang; SHEN Xian-kun; LI Run-hao; HU Xiu-de; SUN De-shuai; CHEN Zhao-jun

doi:10.13205/j.hjgc.202012017

Volume 38 Issue 12

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(12): 97-102,91

ZHU Hong-tang, SHEN Xian-kun, LI Run-hao, HU Xiu-de, SUN De-shuai, CHEN Zhao-jun. REMOVAL OF FINE PARTICLES FROM COAL COMBUSTION WITH CHEMICAL AGGLOMERATION AGENTS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(12): 97-102,91. doi: 10.13205/j.hjgc.202012017

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ZHU Hong-tang, SHEN Xian-kun, LI Run-hao, HU Xiu-de, SUN De-shuai, CHEN Zhao-jun. REMOVAL OF FINE PARTICLES FROM COAL COMBUSTION WITH CHEMICAL AGGLOMERATION AGENTS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(12): 97-102,91. doi: 10.13205/j.hjgc.202012017

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REMOVAL OF FINE PARTICLES FROM COAL COMBUSTION WITH CHEMICAL AGGLOMERATION AGENTS

doi: 10.13205/j.hjgc.202012017

1. College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China;
2. State Key Laboratory of High-efficiency Utilization of Coal & Green Chemical Engineering, Ningxia University, Yinchuan 750021, China

Received Date: 2019-12-18
Available Online: 2021-04-23

Abstract

Abstract

Fine particles from coal combustion have a serious impact on human health and atmospheric environment. Chemical agglomeration technology could help the agglomeration of fine particles to form large aggregation which were captured easily by conventional precipitator. The constituents of chemical agglomeration agents affected greatly the removal efficiency of fine particles. A multi-components chemical agglomeration agent including surfactant, polymer flocculant and inorganic salt was atomized and ejected into the agglomeration chamber to increase the agglomeration of fine particles. The experimental data showed that the two-component agglomeration agent containing inorganic salt and surfactant or flocculant could increase the removal of fine particles. The maximum efficiency in Tween-80 mixture was 44.1%. The increment of the concentration of agglomeration agents could benefit for the removal of particles, especially for positively charges surfactant or flocculant. However, high concentration of flocculant resulted in high viscosity of solution, consequently forming large spray droplet and decreasing the number of droplet, which could not favor the agglomeration process. For the surfactants, high concentration could result in their remains in emission due to the small molecule structure. The concentration of agglomeration agent should be controlled detailed. The removal efficiency of fine particles could be further improved as the inorganic salt, especially when ammonium chloride was added. And high concentration of slat favored this process. The optimum pH value at which the removal was maximum was in weak acid range. The adhesive force among particles increased by 3.5 times when three-component chemical agents were used to remove particles. Therefore, the mass of fine particles reduced by 45%~49%, and the median diameter increased from 3.5 μm to 7.5~8.6 μm.
- particles,
- agglomeration,
- agglomeration agent,
- removal efficient,
- coal combustion,
- surfactant,
- flocculent,
- inorganic salt

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References(36)

References

国家统计局.中华人民共和国2018年国民经济和社会发展统计公报[EB/OL].[2019-02-28

]. http://www.stats.gov.cn/tjsj/zxfb/201902/t20190228_1651265.html.

王超,刘小伟,徐义书,等.660 MW燃煤锅炉细微颗粒物中次量与痕量元素的分布特性[J].化工学报,2013,64(8):2975-2981.

LV H X, HUANG Y H. The state of particulate matter contamination, particulate matter-bound heavy metals, and persistent organic pollutants (POPs) in megacities, China[J]. Current Opinion in Environmental Science & Health, 2019,8(1):15-22.

GUO Q J, YANG Z N, ZHANG J S, et al. Influence of a combined external field on the agglomeration of inhalable particles from a coal combustion plant[J]. Power Technology, 2012,227(1):67-73.

CHEN D L, WU K, MI J C, et al. Experimental investigation of aerodynamic agglomeration of fine ash particles from a 330 MW PC-fired boiler[J]. Fuel, 2016,165(1):86-93.

杨维,赵文吉,宫兆宁,等.北京城区可吸入颗粒物分布于呼吸系统疾病相关分析[J].环境科学,2013,34(1):237-243.

JAWOREK A, SOBCZYK A T, KRUPA A, et al. Hybrid electrostatic filtration systems for fly ash particles emission control[J]. Separation and Purification Technology, 2019,213(15):283-302.

ZHOU D, LUO Z Y, FANG M X, et al. Numerical calculation of particle movement in sound wave fields and experimental verification through high-speed photography[J]. Applied Energy, 2016,185(Part2):2245-2250.

YAN J P, LIN Q, ZHAO S H, et al. Effect of seed nuclei combined with acoustic field on fine particles removal[J]. Powder Technology, 2018,340(1):8-16.

LUO Z Y, HAO C, TAO W, et al. Agglomeration and capture of fine particles in the coupling effect of pulsed corona discharge and acoustic wave enhanced by spray droplets[J]. Powder Technology, 2017,312(1):21-28.

LI Y W, ZHAO C S, WU X, et al. Experimental investigation on agglomeration of coal-fired PM₁₀ in uniform magnetic field[C]. 2007,914(1):593-599.

CHEN D L, WU K, MI J C, et al. Experimental investigation of aerodynamic agglomeration of fine ash particles from a 330 MW PC-fired boiler[J]. Fuel, 2016,165(1):86-93.

SUN D S, ZHANG X D, ZHANG Z Y, et al. Removal of inhalable particles from coal and refuse combustion by agglomeration with solid nuclei[J]. Particuology, 2018,37(2):127-133.

郭沂权,张军营,赵永椿,等. 50 MW燃煤电站锅炉细颗粒物化学团聚示范工程试验研究[J].中国电机工程学报,2016,36(1):87-94.

ZHANG G X, ZHANG L L, WANG J, et al. Improving acoustic agglomeration efficiency by addition of sprayed liquid droplets[J]. Powder Technology, 2017,317(1):181-188.

RAJNIAK P, MANCINELLI C, CHERN R T, et al. Experimental study of wet granulation in fluidized bed:impact of the binder properties on the granule morphology[J]. International Journal of Pharmaceutics, 2007,334(2):92-102.

盘思伟,张凯,郭沂权,等.燃煤飞灰化学团聚促进机制研究[J]. 热力发电,2016,45(6):19-25.

赵汶,刘勇,鲍静静,等.化学团聚促进燃煤细颗粒物脱除的试验研究[J].中国电机工程学报,2013,33(20):52-58.

刘勇,赵汶,刘瑞,等.化学团聚促进电除尘脱除PM_2.5的实验研究[J].化工学报,2014,65(9):3609-3616.

张光学,朱颖杰,周涛涛,等.喷雾对促进细颗粒物声波团聚的影响[J].化工学报,2017,68(3):864-869.

SUN Z K, YANG L J, SHEN A, et al. Improving the removal of fine particles from coal combustion in the effect of turbulent agglomeration enhanced by chemical spray[J]. Fuel, 2018,234(15):558-566.

于洋,孙德帅,颜培玲,等.湍流与化学团聚耦合促进燃煤细颗粒物的清除[J].环境工程学报,2017,11(11):5949-5955.

GUO Y Q, ZHAO Y C, WANG S L, et al. Relationship between the zeta potential and the chemical agglomeration efficiency of fine particles in flue gas during coal combustion[J]. Fuel, 2018, 215(3):756-765.

赵永椿,张军营,魏凤, 等. 燃煤超细颗粒物团聚促进机制的实验研究[J]. 化工学报, 2007,58(11):2876-2881.

AN Z, GONG M, ZHANG L, et al. Experimental research and numerical simulation on fine particles matter removal by foam agglomeration method[J]. Energy & Fuels, 2017, 31(9):10205-10211.

GUO Y Q, ZHANG J Y, ZHAO Y C, et al. Chemical agglomeration of fine particles in coal combustion flue gas: experimental evaluation[J]. Fuel,2017,203(9): 557-569.

SUN Z K, YANG L J, WU H, et al. Effect of turbulent flow field properties on improving the removal of coal-fired fine particles in chemical-turbulent agglomeration[J].Advanced Powder Technology, 2020, 31(1):158-168.

洪迪昆,刘亮,郭欣,等.无机盐离子对团聚剂溶液性质的影响机制[J].中国电机工程学报,2016,,36(16):4363-4368.

申贤坤,孙德帅,刘亚丽,等.化学团聚剂作用下燃煤颗粒物团聚脱除[J].环境科学与技术,2017,40(10):111-116.

唐小珊,许玖龙,王振书,等.检测水中残存微量吐温80的方法探索[J].化学工程与装备,2011,1(6):1844-185.

LEI Z, WU C, HAO W, et al. Investigation on the relationship of droplet atomization performance and fine particle abatement during the chemical agglomeration process[J]. Fuel, 2019,245(1):65-77.

孙德帅,朱童,胡晓静,等.不同燃烧源飞灰细颗粒物理化学特性与润湿性[J].环境科学与技术,2015,38(8):6-10

,43.

洪迪昆,刘亮,郭欣,等.温度对聚丙烯酰胺稀溶液黏度影响的分子动力学模拟[J].中国电机工程学报,2015,35(23):6099-6104.

SHANTHAKUMAR S, SINGH D N, PHADKE R C, et al. Influence of flue gas conditioning on fly ash characteristics[J]. Fuel, 2008,87(15/16):3216-3222.

杨晓媛,肖立春,张萌,等.化学团聚对燃煤细颗粒物的脱除[J].环境工程,2018,36(11):58-63.

GUO Y Q, ZHANG J Y, ZHAO Y C, et al. Chemical agglomeration of fine particles in coal combustion flue gas: experimental evaluation[J]. Fuel, 2017,203(1):557-569.

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