In this study, the water recovery performance from flue gas with ceramic membrane tubes of different pore sizes 30, 50, and 200 nm was experimentally studied. The effects of flue gas temperature, flue gas flow rate, water coolant temperature, and water coolant flow rate on the water recovery performance were analyzed. In addition, in the experimental study of SO₂ permeability, the pH of the water coolant inlet and outlet was measured using a pH meter to analyze the SO₂ permeability of ceramic membranes during the water recovery process. The results show that the water recovery performance of the 50 nm pore size ceramic membrane is better than that of the other two types of ceramic membrane in most cases. The maximum amount of reclaimed water and the highest water recovery rate are 4.82 kg/(m²·h) and 80.3%, respectively. Under the same SO₂ concentration condition, the SO₂ permeation flux of the 30 nm pore size ceramic membrane is smallest, and that of the 200 nm membrane is the largest. When the SO₂/N₂ mixed gas flow rate is 6 L/min, the SO₂ permeation flux of the 30 and 200 nm membranes is 0.407 and 0.635 mmol/(m²·h), respectively. The ceramic membrane with smaller pore size can block more SO₂ permeation, while the ceramic membrane with larger pore size can remove SO₂ better.

中文翻译：

---

不同孔径的陶瓷膜的水回收率和SO2渗透性的实验研究

在这项研究中，实验研究了用孔径分别为30、50和200 nm的陶瓷膜管从烟道气中回收水的性能。分析了烟气温度，烟气流量，冷却水温度和冷却水流量对水回收性能的影响。另外，在SO ₂渗透性的实验研究中，使用pH计测量水冷却剂入口和出口的pH以分析SO _2。回收水过程中陶瓷膜的渗透性。结果表明，在大多数情况下，孔径为50 nm的陶瓷膜的水回收性能优于其他两种类型的陶瓷膜。再生水的最大量和最高的水回收率分别为4.82 kg /（m ² ·h）和80.3％。在相同的SO ₂浓度条件下，孔径为30 nm的陶瓷膜的SO ₂渗透通量最小，而孔径为200 nm的陶瓷膜的SO ₂渗透通量最大。当SO ₂ / N ₂混合气体流速为6 L / min时，30和200 nm膜的SO ₂渗透通量为0.407和0.635 mmol /（m ²·h）。孔径较小的陶瓷膜可以阻止更多的SO ₂渗透，而孔径较大的陶瓷膜可以更好地去除SO ₂。