Delayed coking system and delayed coking process

Abstract

The invention provides a delayed coking system. The delayed coking system comprises a coke tower, an oil gas flash tank, a fractionating tower, a first oil gas pipeline and a second oil gas pipeline, wherein the coke tower is communicated with the oil gas flash tank through the first oil gas pipeline; the oil gas flash tank is communicated with the fractionating tower through the second oil gas pipeline; the oil gas flash tank is provided with a quenching system; the quenching system is used for providing quenching oil for the interior of the oil gas flash tank; the quenching oil is used for cooling and washing the oil gas which is generated by the coke tower and enters the oil gas flash tank; the final boiling point of the quenching oil is lower than that of the oil which is introduced into the oil gas flash tank. According to the delayed coking system provided by the invention, the content of coke powder in a coked light product can be effectively reduced, and the quality of the product can be improved. The invention further provides a delayed coking process used by the delayed coking system.

Description

technical field [0001] The invention relates to the technical field of petroleum refining, and in particular to a delayed coking system and a delayed coking process. Background technique [0002] Due to the non-renewable nature of petroleum resources, its efficient utilization has become a common concern of scientific and technological workers. [0003] At present, the delayed coking process has developed into an important means of heavy oil processing due to its mature technology, strong adaptability, thorough decarburization, and simple process. However, with the continuous deterioration of crude oil properties, the heavy oil processed by the delayed coking process also shows a trend of inferior quality, which brings certain challenges to the economical efficiency of heavy oil processed by the delayed coking process and makes the operation of the coking unit difficult. The product quality deteriorates, the yield of low value-added products coke and gas increases, and the ...

AI Technical Summary

Problems solved by technology

The equipment and method can improve the poor quality of wax oil products in the conventional delayed coking process, the heavy wax oil section of the fractionation tower is easy to coke, the coke tower reaction oil gas pipeline is easy to coke, and the device circulation ratio is not easy to adjust. However, the invention is mainly from the fractionation tower. The equipment has been improved, the improvement is more complicated, and the effect of increasing liquid collection is not significant enough

[0010] To sum up, in the prior art, in order to improve the economic benefits of the delayed coking unit, technicians mostly start from the perspectives of increasing material handling equipment, adding liquid increasing or coke suppression additives, improving the heating furnace process, and improving fractionation tower equipment. These methods Both have a certain effect on improving the economy of the delayed coking unit, but there are still certain problems in each

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