Heat exchanger of sulfuric acid plant and its structure
2024-05-07
According to the process, the heat exchanger of the sulfuric acid plant can be divided into high temperature superheater, low temperature superheater, economizer, cold and hot heat exchanger, hot and hot heat exchanger, etc.
（12) High temperature heat exchanger and low temperature superheater are shell and tube heat exchanger, The heat exchange tube is a serpentine finned tube. Its structure is: the shell side is converted into flue gas, the tube side is steam, the equipment body adopts a fully welded structure, and the serpentine heat exchange tube and the tube plate are not welded, so that the serpentine fin heat exchange tube can expand freely.
（22) The cold and hot heat exchangers and the hot and hot heat exchangers are shell-and-tube heat exchangers, and the heat exchange tubes are tubular heat exchangers, which are used for heat exchange between high-temperature furnace gas and low-temperature furnace gas. The cold and hot heat exchanger and the hot and hot heat exchanger are equipped with high-temperature furnace gas auxiliary line and low-temperature furnace gas auxiliary line, which can be adjusted mutually according to process requirements. High-temperature furnace gas is circulated by the tube pass, low-temperature furnace gas is circulated by the shell pass, and both the tube pass and the shell pass are provided. Acid drainage pipe, regular artificial blowdown of the condensed acid in the equipment. The whole equipment adopts a fully welded structure, and the smoke pipe adopts the manufacturing process of first expansion and then welding.
（32) The economizer is a shell-and-tube heat exchanger, and the heat exchange tube is a serpentine finned tube. Its working principle is that the boiler feed water enters the boiler drum through the economizer, The heated water enters the lower drum through the down pipe, and the steam-water mixture generated by the water in the drum heated by the high-temperature flue gas enters the drum through the up pipe above the drum to form a circulation loop. The shell side is flue gas, the tube side is boiler water, equipment The whole adopts a fully welded structure, and an expansion plate is arranged on one side of the box body.
（44) The acid cooler is a shell-and-tube heat exchanger, and the heat exchange tube is a tube type. Its working principle is that circulating water is used in the tube side to cool the acid in the shell side to meet the requirements of storage and transportation.
（5) The industrial water heat exchanger is a plate heat exchanger. Its working principle is that thin rectangular channels are formed between the plates, and the fluid moves between the plates to form heat exchange.
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