Abstract
In this paper we present the problem of electrostatic phenomena in powder pneumatic conveying, which includes the dilute phase transport and dense phase conveying. It is certified that the dust explosion of polyolefin silo in the past is related to the electrostatic discharge in the silo. By analyzing the data from the field, it is revealed that the statics of dense phase conveying and dilute phase conveying are in the same order of magnitude. However, it is more difficult for dense phase to be controlled due to the absolute value of the amplitude fluctuation. The data of field survey and basic experiments show that polyolefin silo dust explosion is closely related to the failure of controlling gas and dust during the preparation. Finally, the result of experiments by the non-equilibrium bipolar ion wind electrostatic eliminator is introduced, including the effect when its application is expanded.
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