Graphite heat exchanger according to their structure can be divided into block-hole ,shell and tube and plate 3 types. The high cost of graphite heat exchangers, bulky, not much use. It is mainly used for hydrochloric acid, sulfuric acid, acetic acid and phosphoric acid and other corrosive medium heat, such as acetic acid and acetic anhydride, the condenser and so on. Mainly used in the chlor-alkali chemical, petrochemical, fluoride salt, titanium dioxide, zirconium industry, acid, chlorinated paraffin, silicon and other production industries.