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Abstract
Polyformaldehyde (POM) is a modern engineering plastic with excellent characteristics and there is a huge demand for it in China and the world. An industrial plate dryer process with nitrogen protection was newly developed to meet the emerging needs for big-scale and energy-efficient dryers in the production of POM. The plate dryer developed has a production capacity of 43 tons/day POM powder and a thermal efficiency of 78%. A field test report shows that the dryer allows a reliable and smooth operation and meets the quality specifications for POM powders.