—— Welding technology of fluoroplastic heat exchanger ——
I. Fluoroplastic heat exchanger welding technology Introduction
Fluoroplastics have excellent corrosion resistance and high and low temperature resistance, including in various concentrations of strong acids, strong bases and strong oxidants. Fluoroplastic materials commonly used in heat exchangers include polytetrafluoroethylene PTFE (Teflon, Teflon), PFA, FEP and PVDF, among which PTFE is made of PTFE heat exchanger (also known as Teflon heat exchanger or Teflon heat exchanger) is a corrosion-resistant fluoroplastic heat exchanger with extremely high cost performance. Fluoroplastic heat exchanger is used for heating, cooling or condensing in many corrosive occasions such as chemical industry, pharmaceutical industry, electric power, electroplating, iron and steel pickling, boiler flue gas waste heat recovery, flue gas desulfurization and whitening, etc. Fluoroplastic welding technology between tube sheet and tube bundle is very critical in the manufacturing process of fluoroplastic heat exchanger , and Fluoroplastic welding technology directly determines the final quality of fluoroplastic heat exchanger.
II, Fluoroplastics heat exchanger welding technology Features
Fluoroplastics welding technology Applied to PTFE, FEP and other fluoroplastics heat exchanger welding, has experienced 50 years of development in China, has been very mature. Among them, PTFE welding is the most difficult welding in fluoroplastics. This technology adopts advanced high-temperature one-time welding method, and through this fluoroplastic welding method , the tubesheet and hundreds or even thousands of fluoroplastic tube bundles can be welded into a whole at one time. After welding, the fluoroplastic heat exchanger is stabilized under 8kg water pressure or air pressure for 24 hours without any water or gas seepage, and the welding strength of a single piece exceeds 15kg/cm2.
III, Fluoroplastic Heat Exchanger Welding Technology Data
Fluoroplastic Welding Technology Including detailed welding process, method, related equipment drawings, related tooling drawings, withstand pressure test methods and technical requirements for fluoroplastic tubesheet and tube bundle, etc. It has excellent operability.