I. Brief introduction

Manufacturing technology of polypropylene heat exchanger is a complete set of heat exchange equipment manufacturing technology formed by heat exchange in suitable environment according to the characteristics of polypropylene. Polypropylene (PP) has good corrosion resistance to acid and alkali chemical solutions without oxidizing property, but strong oxidizing acids or strong oxidizing liquid medicines such as concentrated nitric acid and concentrated sulfuric acid will corrode PP plastics. PP has good heat resistance and melting point is 164 ~ 170 ℃. It can also be used continuously at 100 ℃ under low load. It has good stress relaxation resistance at 90 ℃. But the low temperature resistance is poor.

Polypropylene heat exchanger belongs to plastic heat exchanger, which can be made into immersion type or shell-and-tube type, and can be used for heating, cooling and condensing acid-alkaline solutions such as hydrochloric acid, hydrofluoric acid and dilute sulfuric acid at normal temperature.

II. Technical features

Manufacturing technology of polypropylene heat exchanger It is a summary of many years' design and manufacturing experience. Including a complete set of relevant documents and standards from material selection, production equipment, scheme design, drawing design, production and manufacturing, quality control, etc. One-time integral welding is adopted between tubesheet and heat exchange tube, which is simple and reliable, and the welding strength of each tube is greater than 15kgf. After welding, the pressure is stabilized for 24 hours under 8kg water pressure without any water seepage