High-pressure converter maintenance of hydrogenation unit (multiple images)

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This post was last edited by Zhizhi Ming on 2024-5-12 at 11:28. The major maintenance has begun; it involves the maintenance of the threaded lock ring heat exchanger in the hydrogenation unit, which is a type of U-tube heat exchanger. The steps are as follows: preparation work → making marks on the shell and head assembly → measuring the distance from the end face of the threaded lock ring to the cover plate of the tube box, as well as the distance from it to the end face of the shell → removing the clamping bolts on the head assembly → recording the residual torque → installing clamping plates and counterweights → removing components such as the threaded lock ring from the head assembly → removing the inner and outer pressure rings → removing the sealing disc → removing the gasket on the tube side → removing the inner sleeve and support ring → making marks on the end faces of the inner flange assembly and the partition box → measuring the distance from the triple-ring assembly to the end face of the partition box → removing the bolts of the inner flange → recording the residual torque → removing the triple-ring assembly → removing the inner flange → removing the upper cover plate and gaskets of the tube box, as well as the packing and packing cover → removing the partition box → removing the tube bundle, cleaning it, conducting physical and chemical tests, and performing pressure testing → removing the gasket on the shell side, checking the sealing surfaces → cleaning → conducting physical and chemical tests inside the shell.