An Improved Delayed Coking Process

A delayed coking and process technology, which is applied in the field of improved delayed coking process, can solve the problems of insufficient effect of increasing liquid recovery, increase of coke and gas yield, and difficult operation of coking unit, so as to reduce coke powder content and reduce oil and gas load , the effect of reducing reaction pressure

Active Publication Date: 2018-02-16
SINOPEC ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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. Increased yield of low value-added products coke and gas, lower liquid yield
In the prior art, in order to improve the economic benefits of the delayed coking unit, technicians mostly start from the perspectives of adding liquid increasing or coke suppressing additives, improving the heating furnace process, improving the fractionation tower equipment, etc. These methods are beneficial to improving the economic efficiency of the delayed coking unit It has a certain effect, but its effect of increasing liquid collection is not significant enough

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  • An Improved Delayed Coking Process
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Examples

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Effect test

Embodiment 1

[0044] The outlet temperature of the heating furnace 101 , circulation ratio and coke generation period of the embodiment of the present invention and the comparative example are consistent with those of the comparative example.

[0045] The steps of the improved delayed coking process mainly include: the raw material oil 201 is heated by the heating furnace 101 to a coking temperature of 498°C, and then enters the first coke tower 102 for coking reaction, the second coke tower 103 is to be produced, and the top of the first coke tower 102 The absolute pressure in the oil-gas buffer tank 104 is 120Kpa. The raw material oil 201 undergoes coking reaction in the first coke tower 102, and the oil gas 202 generated after the reaction enters the oil-gas buffer tank 104 through the oil transfer line. The absolute pressure in the oil-gas buffer tank 104 is 102Kpa. The cooling medium 203 is passed into the tank 104. In this embodiment, the cooling medium 203 is preferably coked diesel o...

Embodiment 2

[0048] The steps of the improved delayed coking process mainly include: the raw material oil 201 is heated by the heating furnace 101 to a coking temperature of 498°C, and then enters the first coke tower 102 for coking reaction, the second coke tower 103 is to be produced, and the top of the first coke tower 102 The absolute pressure in the oil-gas buffer tank 104 is 150Kpa. The raw material oil 201 undergoes coking reaction in the first coke tower 102, and the oil gas 202 generated after the reaction enters the oil-gas buffer tank 104 through the oil transfer line. The absolute pressure in the oil-gas buffer tank 104 is 133Kpa. Pass into cooling medium 203 in the tank, preferably cooling medium 203 is coking wax oil in the present embodiment, the temperature of coking wax oil is 120 ℃, and the amount of coking wax oil accounts for 15% of the mass percent of raw material oil 201, and coking wax oil is to The generated oil gas 202 entering the oil-gas buffer tank 104 is cooled,...

Embodiment 3

[0051] The steps of the improved delayed coking process mainly include: the raw material oil 201 is heated by the heating furnace 101 to a coking temperature of 498°C, and then enters the first coke tower 102 for coking reaction, the second coke tower 103 is to be produced, and the top of the first coke tower 102 The absolute pressure in the oil-gas buffer tank 104 is 170Kpa. The raw material oil 201 undergoes coking reaction in the first coke tower 102, and the oil gas 202 generated after the reaction enters the oil-gas buffer tank 104 through the oil transfer line. The absolute pressure in the oil-gas buffer tank 104 is 152Kpa. The cooling medium 203 is passed into the pipe. In this embodiment, the cooling medium 203 is preferably a mixture of coker gasoline, coker diesel oil and coker wax oil. The temperature of the mixture is 110° C., and the amount of coker wax oil accounts for 19% of the mass percentage of the raw material oil 201. , the mixture cools the generated oil ga...

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Abstract

The invention provides an improved delayed coking technology, and belongs to the field of petroleum refining. The improved delayed coking technology comprises the following steps: firstly, a heating step: pumping raw oil into a heating furnace, and heating the raw oil to coking temperature; secondly, a coking step: pumping the heated raw oil into a coke chamber for carrying out a coking reaction, and generating oil gas through the coking reaction; thirdly, a cooling step: pumping the generated oil gas into an oil gas buffer tank and cooling, thus obtaining a cooled material; finally, a fractionating step: dividing the cooled material into an upper branch and a lower branch, and fractionating by enabling the upper branch and the lower branch of the cooled material to enter a fractionating tower, thus obtaining a coking product. According to the improved delayed coking technology provided by the embodiment of the invention, the liquid yield of a delayed coking device can be remarkably increased; meanwhile, the pressure drop of the fractionating tower can be effectively reduced, and the separating efficiency of the fractionating tower is increased.

Description

technical field [0001] The invention relates to the field of petroleum refining, in particular to an improved 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. 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 yield of low value-added products coke and gas is increased, and the yield of liquid is decreased. In the prior art, in order to improve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/04
CPCC10G55/04
Inventor 王洪彬黄新龙韩海波李节江莉刘淑芳王少锋张瑞风胡艳芳陈章淼
Owner SINOPEC ENG GRP CO LTD
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