Abstract:

In order to study the desulphurization properties of seawater with jet bubbling reactor, experimental researches on SO₂ removal from simulated marine waste gas were investigated in a self-designed jet bubbling reactor. The parameters influencing desulphurization efficiency, such as waste gas flow, seawater temperature, immersion depth, inlet concentration of SO₂ and O₂, were examined. Results showed that the absorption capacity of seawater scrubbing SO₂ was up to 3.682 mmol·L^-1 about 3.92 times that of deionized water. The desulphurization efficiency decreased with the increase in waste gas flow, seawater temperature and inlet SO₂ concentration while it increased with increasing immersion depth and inlet O₂ concentration. Desulphurization efficiency reduced linearly over desulphurization time. Increasing waste gas flow can increase total liquid phase mass transfer coefficient by 3.16%, which was less than that of seawater temperature. The absorption capacity increased significantly with increasing inlet O₂ concentration. It increased from 3.682 mmol·L^-1 to 7.463 mmol·L^-1 as the inlet O₂ concentration increased from 0% to 12%.

Key words: seawater, jet bubbling reactor, mass transfer, reaction kinetics, bubble, desulphurization efficiency

摘要：

为探究以海水作为脱硫剂在喷射鼓泡塔上的脱硫特性,通过改变废气流量、海水温度、浸液深度、SO₂进口浓度和O₂浓度等操作参数,在自主设计和搭建的喷射鼓泡塔实验平台上进行了船舶模拟废气的脱硫实验。实验结果表明:在喷射鼓泡塔上,海水对SO₂的吸收容量为3.682 mmol·L^-1,约是去离子水的3.92倍;脱硫效率随废气流量、海水温度和SO₂进口浓度的升高而降低,随浸液深度和O₂浓度的升高而升高,与脱硫时间呈线性下降关系。液相总传质系数随废气流量和海水温度的增加而增加,其中废气流量的影响幅度较小,仅为3.16%。增加O₂浓度可显著提高海水对SO₂的吸收容量,O₂浓度从0%增至12%时,海水的吸收容量从3.682 mmol·L^-1增至7.463 mmol·L^-1。

关键词: 海水, 喷射鼓泡塔, 传质, 反应动力学, 气泡, 脱硫效率