Heat exchangers are for heat transfer between hot and cold fluids. Heat exchanger is important unit equipment. It is useful in petroleum, chemical industry and machinery. It is important in metallurgy and other engineering fields. Heat exchangers have an important impact on the construction investment.
I. Sorting by Use of Heat Exchangers
(1) Heater: The heater is used to heat the fluid to the required temperature. The heated fluid will not change during the heating process.
(2) Preheater: Preheater is used to preheat fluid and improve the heating efficiency of the whole process device.
(3) Superheater: It is used to heat saturated steam to an overheated state.
(4) Evaporator: It is used to heat liquid and vaporize it.
(5) Reboiler: It is for distillation process. It is used to heat the condensed liquid and make it vaporize.
(6) Cooler: The cooler is used to cool the fluid to the required temperature.
(7) Condenser: The condenser is used to condense saturated steam to release latent heat. It can condense and liquefy.
II. Sorting According to the Shape and Structure of Heat Transfer Surface
(1) Tubular heat exchanger: Tubular heat exchanger conducts heat through the wall of the tube. There are tube heat exchange tubes and sleeve heat exchangers There are snake tube heat exchangers.
(2) Plate heat exchanger: Plate heat exchanger conducts heat through the plate surface. There are flat plate heat exchangers and spiral plate heat exchangers. There are plate-fin heat exchangers and hot plate heat exchangers.
Sorting by Materials
(1) Metal material heat exchanger: Common metal materials include carbon steel and alloy steel. There are copper and copper alloy. There are aluminum and aluminum alloy. Titanium and titanium alloy are useful. The heat transfer efficiency is high. The heat exchangers used in normal production are metal heat exchangers.
(2) Non-metallic material heat exchanger. Common non-gold chip materials include graphite, glass, plastic and ceramics. This kind of heat exchanger is for corrosive materials. Their heat transfer efficiency is low.
It is popular in chemical, petroleum, power and atomic energy industries. Its main function is to ensure the specific temperature. At the same time, it is one of the main equipment to improve energy use rate.
