Discussing the materials used for catalytic cracking towers and heat exchange equipment in the petrochemical industry
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Towers and other equipment: The towers and other equipment in a catalytic cracking unit mainly include fractionation towers, top reflux tanks, light cycle oil stripping towers, heavy cycle oil stripping towers, absorption towers, and desorption towers. Their shells are generally made of carbon steel + 0Cr13Al (0Cr13) composite plates, while the trays are made of 0Cr13, 12AlMoV, or aluminized carbon steel. Heat exchanger, catalyst cooler (external heat extractor): The shell is made of carbon steel with a heat-insulating and wear-resistant lining; the evaporation tubes are typically made of 15CrMo, while the superheating tubes are made of 12Cr1MoV or 1Cr5Mo. The internal components are made of 0Cr18Ni9. Recirculation oil heat exchanger: medium temperature
In the towers and heat exchange equipment of petrochemical catalytic cracking units, the selection of materials is crucial. The casings of major equipment such as distillation towers, reflux tanks, and absorption towers are typically made of carbon steel and 0Cr13Al composite plates to improve corrosion resistance and strength. For trays, 0Cr13, 12AlMoV, or aluminized carbon steel are commonly used to meet the requirements of high temperature resistance and wear resistance. For heat exchangers, the shell of the catalyst cooler is typically made of carbon steel and equipped with a heat-insulating and wear-resistant lining to ensure good thermal conductivity. Evaporation tubes are usually made of 15CrMo, while superheater tubes are made of 12Cr1MoV or 1Cr5Mo; these alloy materials can withstand high temperature and pressure conditions. The internal components are usually made of 0Cr18Ni9, which not only offers excellent corrosion resistance but also ensures long-term stable operation. Taking everything into account, the material chosen must not only meet the requirements regarding temperature and pressure but also possess good corrosion resistance and mechanical strength to ensure the safety and efficiency of the equipment. .