Main application fields: drying, pyrolysis, calcination, cooling, reaction, sublimation. (I) Organic chemical products: Polyvinyl chloride resin, Polytetrafluoroethylene resin, Maleic anhydride, Anthraquinone, Nitroanthraquinone, p-Aminophenol, Melamine, Cyanuric acid, p-Aminobenzenesulfonic acid.