Spiral plate heat exchanger is a kind of high efficiency heat exchanger equipment, suitable for steam steam, steam - liquid, liquid liquid, the liquid heat transfer. It is suitable for chemical, petroleum, pharmaceutical, food, solvent, light industry, textile, metallurgy, steel rolling, coking industry. According to the structure of the form can be divided into non detachable type (type I) spiral plate and a detachable (II, III) spiral plate heat exchanger.