What are the advantages and disadvantages of graphite heat exchanger blocks and tubes

Block graphite heat exchanger and tube graphite heat exchanger are mainly used in chlor-alkali chemical industry, petrochemical industry, fluoride salt, titanium dioxide, zirconium industry, chloroacetic acid, chlorinated paraffin, monocrystalline silicon fluorine chemical and other production industries. The main differences are summarized as follows:

The round-hole type graphite heat exchanger has advanced technology. It consists of a cylindrical graphite block impregnated by a special process, a graphite head and a sealing gasket between them, and is stacked into the heat exchange body through metal cover plates, tie rods and springs. It has the advantages of high structural strength, strong temperature and pressure resistance, good impact resistance, high volume utilization, high heat transfer effect, long service life and easy maintenance. If there is leakage, the heat exchange block can be replaced without affecting the heat exchange area. , High temperature resistance, high pressure resistance, excellent impact resistance, small size, high utilization rate, easy to overhaul, can be used as evaporator, heater, cooler, condenser, reboiler, etc., especially as heater, reboiler, etc. The effect of boiler and condenser is more ideal. Disadvantages: Once leakage occurs, it must be returned to the factory for repair. The column tube is not used.

Tubular graphite heat exchangers have the advantages of easy inspection of all seals, reduced pressure, large product specifications, and low prices. In the operating temperature, the limit temperature of the tubular graphite heat exchanger is generally 130 degrees, while the round block The hole type graphite heat exchanger can reach 165 degrees. If there is a leakage, the tubular graphite heat exchanger is mostly repaired by plugging. If the plugging exceeds a certain number, the heat exchange area and effect will be affected.