Coking at the inlet of large gas line to fractionator has been effectively prevented by setting up steam circle pipes under appropriate operation conditions.
控制合适的操作条件，在大油气管线进分馏塔入口处增加蒸汽环管，可以有效防止结焦。
2
The fractionator, coke tower, wet gas compressor and the heat exchangers were transformed correspondently.
分馏塔、焦炭塔、富气压缩机及换热设备也作了相应的技术改造。
3
The main problem in design of gasoline fractionator is how to prevent blocking of gas phase polymer and coke pellets in packing and gas distributor.