粒径对活性焦固定床和气流床吸附 SO2 过程的影响

华电技术 ›› 2020, Vol. 42 ›› Issue (10): 22-27.

粒径对活性焦固定床和气流床吸附 SO₂ 过程的影响

1. 山东大学能源与动力工程学院，燃煤污染物减排国家工程实验室，环境热工技术教育部工程研究中心，山东省
能源碳减排技术与资源化利用重点实验室，济南，250061；2. 西安热工研究院有限公司，西安 710054

出版日期:2020-10-25

Effect of activated coke diameter on SO₂ adsorption in fixed-bed and entrained-flow reactors

1.National Engineering Laboratory for Reducing Emissions from Coal Combustion，Engineering Research Center of Environmental Thermal Technology of Ministry of Education，Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization，School of Energy and Power Engineering，Shandong University，Jinan 250061，China；2. Xi'an Thermal Power Research Institute Company Limited，Xi'an 710054，China

Published:2020-10-25

摘要/Abstract

摘要： 活性焦脱硫是一种非常有潜力的资源化脱硫技术，粒径较小的粉末活性焦相较于大粒径活性焦在成本和
吸附传质方面具有优势。通过不同粒径活性焦的固定床和气流床试验，证明了活性焦在固定床和气流床中吸附
SO2 的速率均随着活性焦粒径的降低而增加，小粒径活性焦相比于大粒径具有更低的传质阻力。同样粒径的活性
焦在气流床中的吸附速率比固定床中的表观吸附速率高 2 个数量级。同一活性焦破碎成小粒径活性焦后，总比孔
容和总比表面积都大幅提高，且增加的比表面积以中大孔（孔径>2 nm）比表面积为主，中大孔的增多通过改善 SO2
在活性焦表面和内部的扩散及吸附过程副产物的迁移和赋存，提高活性焦的吸附速率。

关键词: 活性焦粒径, 固定床, 气流床, 吸附 SO2, 脱硫技术, 传质阻力, 吸附速率, 近零排放

Abstract: Flue gas desulfurization（FGD）by activated coke（AC）is of great potential in the recycling technology. AC
particles with smaller diameter are superior to the one with larger diameter in cost and absorptive mass transfer. Proven by
the tests on AC with different particle diameters，the SO2 adsorption rate of AC increased with the decrease of AC's particle
size both in the fixed-bed and entrained-flow reactors，since the mass transfer resistance of AC with smaller diameter is
lower than that with larger diameter.Taking AC with the same particle size，the adsorption rate of AC in the entrained-flow
reactor was higher than AC in the fixed-bed reactor by two orders of magnitude. Broken into smaller particles，the total
specific pore volume and total specific surface area of AC is greatly increased. The increased specific surface area is mainly
brought by the additional medium and large pores（pore diameter > 2 nm），who improve the diffusion of SO2 on the surface
and inside of AC.The pores also facilitate the migration and storage of the by-products from adsorption process and raise the
adsorption rate of AC.

Key words: activated coke diameter, fixed-bed reactor, entrained-flow reactor, SO2 adsorption, desulfurization technology,
mass transfer resistance, adsorption rate, near-zero emission

张梦泽, 刘志, 张立强, 李阳, 周滨选, 马春元, 董勇 . 粒径对活性焦固定床和气流床吸附 SO₂ 过程的影响[J]. 华电技术, 2020, 42(10): 22-27.

ZHANG Mengze, LIU Zhi, ZHANG Liqiang, LI Yang, ZHOU Binxuan, MA Chunyuan, DONG Yong. Effect of activated coke diameter on SO₂ adsorption in fixed-bed and entrained-flow reactors[J]. Huadian Technology, 2020, 42(10): 22-27.

[1]	赵保华1，高然2，温佳琪2，易祖耀1，韩征飞1. 常温喷雾蒸发处理含盐水蒸发特性研究[J]. 华电技术, 2018, 40(5): 1-7.
[2]	李玲燕1，高鹏2. 某330MW机组脱硫增效改造方案对比分析[J]. 华电技术, 2016, 38(4): 48-50.
[3]	尹鹏飞. 国产600MW超临界燃煤发电机组“近零排放”改造[J]. 华电技术, 2016, 38(1): 54-58.
[4]	陈建军. 烟囱运行工况分析及防腐改造方案[J]. 华电技术, 2010, 32(12): 78-80.

粒径对活性焦固定床和气流床吸附 SO₂ 过程的影响

Effect of activated coke diameter on SO₂ adsorption in fixed-bed and entrained-flow reactors

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 4

编辑推荐

Metrics

本文评价