1.安徽工业大学能源与环境学院,安徽 马鞍山 243002
2.冶金减排与资源综合利用教育部重点实验室,安徽工业大学,安徽 马鞍山 243002
3.山东爱亿普环保科技有限公司,山东 淄博 256400
贾勇(1981—),男,博士,副教授,jiayong2000@163.com
收稿:2018-11-15,
修回:2019-01-09,
网络首发:2020-06-15,
纸质出版:2019-04-12
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贾勇, 蒋进, 赵忍, 荣卫龙, 殷李国, 顾明言, 龙红明. 氨法烟气脱硫SO2吸收传质系数研究[J]. 化工学报, 2019, 70(4): 1367-1374 DOI: 10.11949/j.issn.0438-1157.20181328.
JIA Yong, JIANG Jin, ZHAO Ren, RONG Weilong, YIN Liguo, GU Mingyan, LONG Hongming. Investigation of mass transfer coefficient of absorption of sulfur dioxide by ammonia[J]. CIESC Journal, 2019, 70(4): 1367-1374
贾勇, 蒋进, 赵忍, 荣卫龙, 殷李国, 顾明言, 龙红明. 氨法烟气脱硫SO2吸收传质系数研究[J]. 化工学报, 2019, 70(4): 1367-1374 DOI: 10.11949/j.issn.0438-1157.20181328. DOI:
JIA Yong, JIANG Jin, ZHAO Ren, RONG Weilong, YIN Liguo, GU Mingyan, LONG Hongming. Investigation of mass transfer coefficient of absorption of sulfur dioxide by ammonia[J]. CIESC Journal, 2019, 70(4): 1367-1374 DOI: 10.11949/j.issn.0438-1157.20181328.
喷淋塔氨法脱硫技术被广泛应用于净化烟气的SO
2
,传质系数是喷淋吸收塔重要的设计和运行参数,但目前文献中有关氨法脱硫传质系数的报道很少,还有待进一步研究。在喷淋塔中对氨法脱硫SO
2
吸收传质过程进行了实验研究,结合对液滴和塔壁液膜运动的计算,得到不同实验条件下SO
2
的吸收传质速率,并建立了氨法脱硫SO
2
吸收传质系数表达式。该传质系数包含浆液pH、烟气流速
u
g
和液气比L/G等主要参数,能够反映不同pH、
u
g
和L/G条件下SO
2
在单位气液接触面积上的传质速率。对比验证结果表明,该传质系数计算得到的SO
2
吸收传质速率与实验值之间的相对误差小于±12%,二者能够较好地吻合。建立的传质系数表达式能够为喷淋塔氨法脱硫的优化设计和运行提供理论参考。
The ammonia-based flue gas desulfurization (FGD) using spray scrubber is widely used for removing SO
2
from flue gas. However
the reports about mass transfer coefficient of SO
2
in the ammonia-based desulphurization process are little in the literature and a further investigation is needed
even though the mass transfer coefficient of SO
2
is much needed for optimizing the design and operation of the absorption tower of ammonia-based FGD system. On basis of experiments of absorbing SO
2
with ammonia in a lab-scale spray scrubber
the mass transfer rate per unit gas-liquid interfacial area was investigated by calculating the motion of droplets and liquid membrane. The co
rrelation to predict the mass transfer coefficient of SO
2
absorption by ammonia was also proposed
including parameters pH
u
g
and L/G. The yielding correlation could be used for quantitatively predicting the mass transfer rate per unit gas-liquid interfacial area under different operating conditions such as pH
gas flow rate and liquid-to-gas ratio. The comparison results show that the calculated SO
2
mass transfer rate agrees well with the measured data. The relative error between the calculated mass transfer rate and the measured data is within ±12%. The established mass transfer coefficient expression can provide a theoretical reference for the optimal design and operation of spray tower ammonia desulfurization.
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