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Based on the characteristics of particle plug valve (PPV) [Powder Technol. 115 (1), (2001) 8], a series connection of PPVs, which is used in a positive dilute gas-conveying system for feeding Geldart-D powder periodically from a low-pressurized vessel into a high-pressurized vessel is presented, and four modes of operation have been discussed and tested by experiments.
In this paper, experiments are carried out for three Geldart-D powders in three conical fluidized beds and the hopper-standpipe system. Based on these experimental data, the hopper-standpipe system, which is used to maintain the large pressure drop without the motion of particles when the flow of particles is cut off, is called ''particle plug valve (PPV)'' and the method for predicting the maximum...
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