Abstract:

The heating furnace of delayed coker in SINOPEC Luoyang Co. consisted of two heating chamber with four feeding inlet. To meet the fuel and petrochemical market volatility, according to the benefit of priority, the original structure of the furnace was first changed to a single heating chamber furnace. This change caused some problems: coking at the outlet of the heating furnace was occurred, more compressor surge was happened, the pump was damaged, the operation difficulty of the fractionation tower was increased and the quality of gasoline and diesel was adversely impacted. Several measures were adopted: injecting steam into furnace tube, extending the coking cycle, controlling the oil flow rate and recycling light hydrocarbon fractions, to ensure the safe and stable operation of the device. At the same time, the raw material was fed into the catalytic cracking unit. The benefit of about 5.4 million Yuan per month was obtained.

Key words: delayed coking, furnace, single heating chamber furnace, coking, operation difficulty