Design And Numerical Simulation On Equipment Of Coke Dry Quenching Dust Removal System In Anshan Iron And Steel Corporation

To alleviate dust pollution of the plant and the outstanding maintenance problems, the coke dry quenching (CDQ) dust removal system in Anshan Iron and Steel Cooperation was investigated. The improvement of the dust removal system and the simulation calculation were done in this research, to improve the working conditions and to eliminate the potential safety problems.The operating principles and the equipment composition of the CDQ and its dust removal system were investigated comprehensively. The whole design scheme was considered to be reasonable, but the dust can not be collected because of the irrational structure of gas-collecting hood. The computational fluid dynamics (CFD) software FLUENT was used to simulate the gas phase flow field in the gas-collecting hood. From the gas phase streamline and the velocity distribution of the gas-collecting hood, it was obviously found that the eddy of the streamline was serious and the velocity distribution was fluctuant, which affected the dust collection efficiency directly.The position of vent was changed from the side of the gas-collecting hood to the above. The inflow velocity distribution at the different heights of the gas-collecting hood was discussed. The optimized height of the hood was 1012 mm. The dust collection effects of the particles with different sizes were simulated. The particle trajectory graphs before and after the improvement were obtained. The modification scheme was proposed, so the dust collection efficiencies of the gas-collecting hood will be improved greatly.Under the same exhaust volume, the optimized gas-collecting hood made the air-inhalation velocity more uniform. The relative root mean squareσvalue of monitoring points on the opening of gas-collecting hood reduced to 0.19 from the original 0.47, and the minimum inflow velocity increased to 0.81 m/s from the original 0.54 m/s. The control area of the dust particles with the size of 50 μm and 70μm, was increased about 35% using the improved gas-collecting hood. The research will offer a technological support for the innovation of the CDQ dust removal system, and it will also provide an experience for the further research of the gas-collecting hood and the dust removal system.