关键词: 催化裂化装置, 开工, 不放火炬, 干气充压, 提升管喷汽油, 提升管喷原料油, 气压机启动

Abstract: During the fuel injection stage of the FCC unit, the connection between the reaction and the compressor is very important, which is the key to ensure the control of reaction pressure and the operation of the compressor inlet without flaring. Due to many interference factors and unstable operation during the start-up fuel injection process, it is necessary to discharge flares at the compressor inlet several times to control the reaction pressure, resulting in a large amount of rich gas components being discharged to the flare system for combustion. Through practical exploration of the start-up process, combined with the performance parameters of the compressor, several start-up methods without flaring were compared, and the shortest way of using dry gas + injecting feedstock oil was finally chosen for the unit start-up. By formulating detailed start-up plans and operating principles, and optimizing processes, accurate control of start-up pressurized dry gas, reaction injection amount, compressor speed, compressor anti-surge amount and other parameters can be carried out in the actual start-up process. The goal of no flaring during the start-up process is achieved, effectively reducing environmental pollution, avoiding material loss during the start-up process, and realizing a green and environmentally friendly start-up.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">FCC unit, start-up, without flaring, dry gas pressurization, spray gasoline on the riser, spray feedstock oil on the riser, pneumatic compressor start