关键词: 炼油厂, PSA, 氢提纯, 吸附剂粉碎, 均压压差, 阀检报警, 程控阀故障, 泄漏

Abstract:

Through the actual production situation of the PSA unit in a large refinery's hydrogen production unit, it was found that the problems that occurred during the operation of the PSA unit were mainly concentrated in two aspects: Adsorbent crushing and program control valve failure. After analysis, it is believed that the main reasons for the crushing of adsorbent are the pressure difference and gas flow rate during the pressure equalization process, the influence of the adsorbent pressure network and pressure plate on the top of the adsorption tower, the presence of water in the feedstock gas, and the failure of the programmable valve, which mainly includes valve inspection alarm, electromagnetic valve failure, damage to the valve core sealing surface, leakage of the packing gland, cracking of the valve plate shaft sleeve, and breakage of the valve pin breakage, etc. Based on long-term practical experience, summarize and list the basis for judging faults, analyze the causes of various faults, and develop effective measures such as refining equipment installation inspections, strengthening daily maintenance, optimizing operating parameter settings, and upgrading relevant accessory materials. This can eliminate common faults in the PSA unit and ensure its long-term stable operation.

Key words: refinery, PSA, hydrogen purification, crushing of adsorbent, pressure difference during pressure equalization process, valve inspection alarm, program control valve malfunction, leak