Research On Key Problems In Large Cannula Heat Exchanger

Alumina high-pressure stripping section in the in lOmpa pressure, the original slurry from 90℃final heating to 290℃. Process accounting, the heat exchanger heat transfer area of 3000m2, the heating medium has been on the rise from 170℃to 400℃, The study shows that:due to the large amount of linear expansion, high thermal stress, the traditional fixed at two ends of the model of heat exchange equipment can not meet the requirements of Now in Chalco Henan Branch to break through the traditional limitations of the model at one end clamped at one end simply supported, independent research and development connected independent of the outer tube heat exchanger tube called the large pipe heat exchanger.This thesis is divided into a large pipe heat exchanger structure design, production and site welding equipment and selection of three main chapters. Structural design section, this article discusses the structural design of the thermal compensation allows the calculation of the span within the pipe bearing between the transformation between the two adjacent steam inlet of heat exchanger design and finite element analysis of block board. Which blocking plate finite element analysis section, the simulation method, concluded that the edge of the blocking plate is the weakest stress. Here the structure of slotted processing, and succeeded in reducing the local stress concentration, and lay the foundation for the next welding. The overall manufacturing uses parts shop manufacturing and site welding method of combining completion of the production of complex equipment. The choice of material, the Practice has proved that the selection of low-alloy steel welding heat treatment process than the selection of the welding of high alloy steel with a high level of welding and heat treatment process is more suitable for China’s national conditions.The successful design has withstood the test of aluminum high-pressure stripping section in production practices, I plant to lay the foundation for the design of large pipe heat exchanger.