Study On Pressure Drop And Absorption Efficiency Of Gas-liquid Cocurrent In Packed Column

A gas-liquid co-current operation in an ordinary glass absorption column of ID 72mm is studied on in this paper. Tap water is as absorbent, while gas SO₂ as a solute carried by air. A kind of structured packing of 250X and Dg16 plastic Cascade Mini Ring (CMR) random packing are respectively used for two typical mass transfer. The Flue gas analyzer KANE 940 is adopted for measuring series of necessary experimental data. Comparing with the absorption experiment of gas-liquid counter-current operation is to analyze the co-current process.It is intended to study on how the absorption efficiency with gas-liquid co-current contact is affected by the changes of liquid-gas ratio L/V and how overall pressure drop and absorption efficiency of SO₂ removal are affected by gas F factor. The gas-liquid counter-current operation is compared with and analyzed, to find out the advantages of gas-liquid co-current operation and provide further optimization basis and theoretical guidance for future practical applications in process engineering design.The results show that: The L/V gives effect on the desulfurization efficiency. When L/V is more than 8, the desulfurization efficiency with gas-liquid co-current operation is more than 90%. When L/V increases to a certain extent, the desulfurization efficiency shows a little difference between two operations, It is slightly larger in the counter-current contact. With the increase of the specific liquid load (m3/m2 h), the pressure drop increases. With the increase of gas F factor, pressure drop shows exponential growth in gas-liquid co-current operation with structured or random packing and it is slightly larger in the counter-current operation. The corresponding correlation equation of pressure drop is obtained by data processing. Specific liquid load and relative velocity between gas-liquid two-phases are the main influence factors on desulfurization efficiency. And there is no flooding phenomenon appearing in gas-liquid co-current operation at large gas velocity. In engineering design, the column diameter can be minified, the costs be lower and the investment be saved. which has positive implications for green chemical industry...