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A kind of heavy oil coking method

A technology for heavy oil and coking raw materials, applied in the field of heavy oil coking, can solve the problem of not being able to improve the coking performance of heating furnace tubes at the same time, and achieve the effects of reducing processing steps and processing difficulty, eliminating coke cleaning steps, and increasing contact area.

Active Publication Date: 2017-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a new heavy oil coking method in order to overcome the defects that the existing delayed coking method cannot simultaneously improve the coking performance of the heating furnace tube and increase the liquid yield

Method used

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  • A kind of heavy oil coking method
  • A kind of heavy oil coking method
  • A kind of heavy oil coking method

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Experimental program
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Embodiment approach

[0045] The present invention does not specifically limit the source and introduction method of the heavy oil coking raw material, for example, the heavy oil coking raw material can be various existing heavy oil raw materials that can be used for coking, and the heavy oil coking raw material can be passed through a heating furnace After being heated to 50-400°C, it is introduced into the spray coking tower c. According to a preferred embodiment of the present invention, the heavy oil coking method further includes introducing feedstock oil into the fractionation tower e from a feedstock inlet e1 arranged below the side of the fractionation tower e, and the feedstock oil and the The bottom reflux oil is mixed at the bottom of the fractionation tower e and introduced as coking raw material 17 into the spray coking tower c for atomization, heat exchange and coking reaction. Therefore, the coking problem in the furnace tube of the heating furnace can be completely avoided, and beca...

Embodiment 1-3

[0053] Examples 1-3 are used to illustrate the heavy oil coking method provided by the present invention.

[0054] The feedstock oil is introduced into the fractionation tower e from the feedstock inlet e1 of the fractionation tower e for preheating, and the feedstock oil obtained after preheating is introduced into the spray coking tower c through the feedstock inlet c25 and atomized through the atomizing nozzle c18 to obtain Atomized small droplets with a liquid size of 20-500 μm, the regenerated flue gas 3 is deoxidized through the coke reactor b, and the deoxygenated deoxygenated flue gas 4 (wherein the oxygen content is 0.1 volume %) passes through the top of the spray coking tower c The hot air inlet c24 is introduced into the spray coking tower c and contacts with the above-mentioned atomized small liquid droplets to make it reach the coking temperature and carry out the coking reaction. The bottom of the lower cone collection area c22 is collected, and the mixture 6 of...

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Abstract

The invention provides a heavy oil coking method including the steps of: 1) atomizing a heavy oil coking raw material at 50-400 DEG C; 2) contacting the atomized heavy oil coking raw material with deoxidized flue gas at 490-750 DEG C to enable the atomized heavy oil coking raw material to reach a coking temperature, so that a coking reaction can be carried out; 3) separating coke coarse powder, coke fine powder and oil gas from a coking reaction product; and 4) performing fraction separation to the oil gas. The heavy oil coking method not only reduces, even completely avoids coking in a furnace tube of a heating furnace and increases liquid yield, but also is free of steps of desulfurization, denitrification and dust removal to the flue gas, so that the method is free of a large quantity of decoking waste water generated in coking and has a great industrial application prospect.

Description

technical field [0001] The invention relates to a heavy oil coking method. Background technique [0002] At present, the trend of heavy crude oil, low quality and high price is becoming more and more obvious. The global demand for light clean fuel oil is growing rapidly. Coupled with increasingly stringent environmental protection requirements, heavy oil deep processing technology has become the development of the world's oil refining industry. the key of. In particular, inferior heavy oil has the characteristics of high density, high viscosity, high heavy metal content, high sulfur content, high nitrogen content, high colloid and asphaltene content, which brings great challenges to the processing of crude oil (especially the secondary processing of heavy oil). difficulty. At present, the value-added technologies to increase the conversion depth of heavy oil and increase the output of light oil products still mainly rely on coking, catalytic cracking of residual oil and hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/04
Inventor 吕庐峰张翊王子军侯栓弟张久顺张哲民何金龙李学锋田志鸿刘亚林马力
Owner CHINA PETROLEUM & CHEM CORP
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