关键词: 延迟焦化, 加热炉, 结焦

Abstract: Analysis on the variations of SARA content and metal content of the feedstock in delayed coking unit, and comparison of the operation parameters prior and post to coking on tube in radiation zone was carried out. It was found that residue feedstock high in saturated hydrocarbon, resin and asphaltene contents, low in aromatic content exhibited high coking tendency. Measures, such as using high recycle ratio to increase the ratio of aromatics to asphaltene and to speed up the flow rate of cold oil in radiation zone tubes, adjusting the wall temperature of furnace tube to suppress coking, monitoring the quality of the feedstock were adopted in operation to reduce coking on furnace tubes.

Key words: delayed coking, furnace, coking