Abstract
High-temperature gas purification technique is of great significance for environmental protection. Moving bed filtration is considered a promising technique. In this study, the moving granular bed filter with the gas-solid counter flow was proposed. The pressure drop and the collection efficiency were investigated with respect to the superficial gas velocity, the mass flow rate of the filtration granules and the dust inlet concentrations. In addition, the dust concentrations at different bed heights were measured with isokinetic sampling. The experimental results indicate that an increasing filter gas velocity or a decreasing mass flow rate of the granule leads to a decrease in dust collection efficiency. An empirical equation was given by combining the single particle filtration analysis with the measured dust concentration distribution along the vertical height of the filter to calculate the moving bed filtration efficiency.
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