Recent Patents on Pressurization and Dedusting for Pneumatic Conveying

Background: The pneumatic conveying system has some advantages such as simple structure, easy loading and unloading, and low environmental pollution, but there are also problems such as pipe wear, blockage and limitation of the transmission distance. Objective: To relieve pipe blockage, reduce in-pipe dust and remove in-pipe blockage, this paper introduces three recent patents of pneumatic conveying systems and methods. Methods: The precision supercharging system and method can produce a more reasonable supercharged flow field; the in-pipe dedusting system and method can offer a satisfying spray effect; the reverse impacting system and method can rapidly form a reverse impact flow field to breakup blockage. Results: The precision supercharging system and method can not only satisfy the demand of local or whole supercharging but also prevent the material breakage and energy loss caused by excessive supercharging; the in-pipe dedusting system and method can not only satisfy the demands of local or whole dedusting but also avoid problems such as clogged pipes and dust explosion; the reverse impacting system and method can not only satisfy the demand of local or whole supercharging but also eliminate the blockage in pipeline. Conclusion: These three recent patents of pneumatic conveying devices have important guiding significance for the development of the pneumatic conveying industry.