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Delay coking process able to flexibly regulate recirculating ratio

A technology of delayed coking and recycle ratio, applied in the field of delayed coking process, can solve the problems of coking, poor quality of coking wax oil, etc., and achieve the effect of improving the total liquid yield, reducing the severity, saving investment and long-term operating costs

Inactive Publication Date: 2005-02-16
SINOPEC LUOYANG PETROCHEM ENG CORP
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Problems solved by technology

[0006] The purpose of the present invention is to develop a process flow that can flexibly adjust the cycle ratio to overcome the defects of the existing delayed coking process and provide The production provides a flexible, safe and reliable delayed coking process that can meet the requirements of long-term production

Method used

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  • Delay coking process able to flexibly regulate recirculating ratio
  • Delay coking process able to flexibly regulate recirculating ratio

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Embodiment Construction

[0026] As shown in the figure: the coking raw material from the pipeline 1 enters the raw material buffer tank 2, after being boosted by the raw material pump 3, it enters the heat exchange system 4, and after exchanging heat to 200-350°C, it enters the coking heating furnace feed buffer tank 5. Coking heating furnace feed 6 is pumped out by radiation feed pump 7 to coking heating furnace 8 and heated to 495-505°C and enters coke tower 9, reaction oil gas 11 enters coking fractionation tower 12, and circulating oil 18 is transferred from coking fractionation tower 12 by circulating oil pump 13 The bottom is extracted, and the withdrawn circulating oil 18 is cooled by the cooler 14 and then divided into three routes: one is the reflux 19 back to the lower part of the coking fractionation tower 12, the other is the coking circulating oil 17 mixed with the coking raw material 1, and the other is the product 20 out of the device. In the figure, the reflux 19 is divided into two rou...

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Abstract

A delay coking process able to flexible regulate the circualting ratio operation features that part of the circulating oil in reaction oil vapour of coking tower is separated out by the coking fractionation tower and then proportionally mixed with the raw material of coking tower. Its advantages are flexible regulation, high total liquid output, and high quality of coker wax oil.

Description

Technical field: [0001] The invention belongs to the field of petroleum refining, in particular to a delayed coking process which can flexibly adjust the cycle ratio operation. Background technique: [0002] Delayed coking unit is a deep non-catalytic cracking thermal cracking process, which converts heavy oil into dry gas, liquefied petroleum gas, coker gasoline, coker diesel oil, coker wax oil, and heavy wax oil is returned to the coke tower as circulating oil for further cracking. The circulation ratio is an important operating parameter of the delayed coking unit, and the change of the circulation ratio has a great influence on the product yield and product quality of the coking unit. [0003] The conventional process of adjusting the circulation ratio of the delayed coking unit adopts the direct heat exchange between the reaction oil gas and the coking raw material in the feed section of the fractionation tower, and controls the condensation of the heavy components in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/14C10G9/16
Inventor 徐江华甘丽琳李和杰张立新
Owner SINOPEC LUOYANG PETROCHEM ENG CORP
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