Design Optimization and Manufacturing Points of Large Diameter External Diversion Tube Heat Exchanger
Take the second stage of the aftercooler of a cracking gas compressor in a million-ton ethylene plant of a project contracted by our company as an example,From the main components of pipe box,shell,tube bundle structural design optimization.For the first time,The TI heat exchange tube was used in the equipment,The concept of TI class tube bundle is introduced.The processing technology of tubesheet of TI grade tube bundle was formulated.Reduce the gap between the heat exchange tube and the tube hole to 0.05～0.35 mm,Verify the feasibility of the process by actual manufacturing.The material selection,field spraying and inspection of anticorrosive coating for tube bundle are introduced,Save the transport cost of tube bundle and shorten the anticorrosion cycle.From the manufacturing difficulties analysis and control of this aspect,In the processing of the shell,the processing of the sidewall of the diversion cylinder,the welding of the shell group,the processing of the tube bundle parts and the corrosion protection of these key processes,Combined with the key technologies summarized in the actual production process of our company,respectively,to bring reference to similar products.The main points of design and manufacture of large diameter external diversion tube heat exchanger for long period and stable operation are summarized.
Large diameter heat exchangerExternal diversion cylinderDesign optimizationManufactureLong period operation
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