Taking the active pressure swing hydrogenation adsorption tower as an example,based on actual use and inspection,a summary and analysis of the structural design,manufacturing process,and inspection and acceptance of tower pressure vessels were conducted.On the traditional adsorption tower structure,the tower top suspension column was eliminated and the welding size between the head and skirt was optimized,which improved the safety performance of the tower equipment during service and reduces the amount of weld overlay.Based on the traceability of three defects during the acceptance process,the technical difficulties in assembly and welding processes were summarized:grinding the weld seam alignment of the cylinder,clarifying the welding process of the tower internals,and grinding and removing the lifting ears of the tower,which could effectively avoid cracks and prevent leakage.The inspection and acceptance criteria were summarized to control the quality of the tower,and ultimately the tower passed the inspection and was put into actual production.
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