Study On Performance And Application Of Micro-gas-liquid Cyclone

Acid regeneration off-gas pollution has become an urgent problem in the metallurgical industry. The method was proposed that the smoke was cooled first and then the droplets were separated. New cyclone was design to solve the problem.Experimental method was used to test the cyclone's pressure drop and separation efficiency under different operating conditions. The optimal process parameters were obtained. When the inlet droplet concentration was 5g/m3 and the average droplets size was 6.S?m, the highest separation efficiency was 95.8%, and the corresponding pressure drop was 1.65KPa, flow rate was 40m3/h.Reynolds Stress Model and Discrete Phase Model were used to simulate the influence of structure parameters on cyclone performance. The principle was obtained that the effects of inlet size, overflow size and total height on cyclone's pressure drop and cut-off diameter. At the same time, the particle trajectory, concentration distribution and the fractional efficiency were acquired through the discrete phase simulation.The best separation performance of the cyclone was achieved when underflow drain pipe effective length was 0.35m. That meant the minimum pressure drop and the maximum separation efficiency. The pressure drop increased after the anti reentrainment cone was installed. When the cross section area ratio was 70%, the separation efficiency and pressure drop reached the maximum. The liquid seal height was simulated using the Eulerian-Eulerian model. And the simulation results were in good accordance with the experimental results.Finally, the smoke physical properties of acid regeneration were analyzed. The separation performance of cyclone was tested under different cooling temperature. Preliminary engineering calculation was executed for the application.