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Hydrogen-supplied delayed coking method for high-acid feedstock oil

A delayed coking method and raw oil technology, applied in the treatment of hydrogen-generating compounds, etc., can solve problems such as increasing investment costs, and achieve the effects of increasing processing capacity, reducing acid value, and reducing free radical concentration

Active Publication Date: 2015-08-19
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above process does not change the process conditions of the delayed coking unit itself, and the liquid yield and coke yield of the coking unit do not change; moreover, due to the use of hydrogenation to increase the delayed coking liquid yield, the investment cost is greatly increased

Method used

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  • Hydrogen-supplied delayed coking method for high-acid feedstock oil
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  • Hydrogen-supplied delayed coking method for high-acid feedstock oil

Examples

Experimental program
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Effect test

Embodiment 1

[0029]The high-acid vacuum residue is mixed with a hydrogen-donating agent for delayed coking processing. The amount of hydrogen-donating agent added is 8.0% of the weight of the vacuum residue raw material. The coking reaction conditions are: reaction temperature 510°C, coke tower The top pressure is 0.18MPa, and the circulation ratio is 0. Results The product yields obtained were: coke yield 25.71%, coking gas yield 7.21%, coking liquid yield 67.08% (including coking gasoline 20.66%, coking diesel oil 22.18%, coking wax oil 24.24%).

[0030] After one year of continuous operation of the delayed coking equipment, the corrosion amount was tested according to the method on pages 13-16, Volume 35, Phase 4, 2006 of Shandong Chemical Industry. 0.01 mm, the corrosion amount of the upper and lower parts of the coke tower is 0.01 mm and 0.02 mm respectively.

Embodiment 2

[0032] The high-acid vacuum residue is mixed with a hydrogen-donating agent for delayed coking process. The hydrogen-donating agent is added in an amount of 25.0% of the weight of the coking raw material. The coking reaction conditions are the same as in Example 1. Results The product yields obtained were: coke yield 24.95%, coking gas yield 6.23%, coking liquid yield 68.82% (of which coking gasoline 19.92%, coking diesel oil 22.05%, coking wax oil 26.85%).

[0033] After one year of continuous operation of the delayed coking equipment, the corrosion amount was tested according to the method on pages 13-16, Volume 35, Phase 4, 2006 of Shandong Chemical Industry. 0.01 mm, the corrosion amount of the upper and lower parts of the coke tower is 0.01 mm and 0.02 mm respectively.

Embodiment 3

[0035] The high-acid vacuum residue is mixed with a hydrogen donor to carry out delayed coking process. The hydrogen donor is added in an amount of 48.0% of the weight of the coking raw material. The coking reaction conditions are the same as in Example 1. Results The product yields obtained were: coke yield 24.68%, coking gas yield 5.96%, coking liquid yield 69.36% (including coking gasoline 19.71%, coking diesel oil 21.83%, coking wax oil 27.82%).

[0036] After one year of continuous operation of the delayed coking equipment, the corrosion amount was tested according to the method on pages 13-16, Volume 35, Phase 4, 2006 of Shandong Chemical Industry. 0.01 mm, the corrosion amount of the upper and lower parts of the coke drum is 0.01 mm and 0.01 mm respectively.

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Abstract

The invention relates to a high-acid-content raw material oil hydrogen-donating delayed coking method which is characterized in that a hydrogen donor is added into the conventional high-acid-content coking raw material as a mixed raw material to perform the hydrogen-donating delayed coking reaction; the mixed raw material exchanges heat with oil gas on the top of the coke tower, is heated by a heating furnace and enters the coke tower to react; the generated coke stays in the coke tower; and the oil gas extracted from the top of the coke tower is cooled by the heat exchange with the coking raw material, and separated to obtain coking gas, coker gasoline, coking diesel and coker gas oil, wherein the recycle ratio is 0 in the coking process. By adopting the coking unit zero-recycle technical process, the method enhances the treatment capacity of the coking unit, reduces the corrosion of the high-acid-value raw material on the delayed coking unit, maximally enhances the liquid product yield, reduces the yield of the coking gas and coke, lowers the coking tendency of the furnace tube, prolongs the operating cycle of the heating furnace, and achieves the goals of optimizing the process and enhancing the economic benefit of the unit.

Description

technical field [0001] The invention relates to the technical field of petroleum refining, and relates to a hydrogen-supply delayed coking method for high-acid feed oil, in particular to a method for increasing the yield of coking liquid and reducing the Methods of coking gas and coke yield. Background technique [0002] Crude oil is a non-renewable energy source. With the rapid development of the world economy, people's dependence on crude oil continues to increase. After years of rapid exploitation, crude oil continues to show a trend of heavy and poor quality. In 2007, the output of high-acid crude oil in the world accounted for 10% of the total output of crude oil, and showed an increasing trend year by year. During the processing of crude oil, the level of acid content is an important factor that cannot be ignored. The research on the corrosion and anticorrosion of petroleum acid to production and refining equipment shows that when the total acid value in petroleum e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G49/20
Inventor 张景成于海斌南军张玉婷耿姗张国辉朱金剑肖寒隋芝宇刘红光李孝国赵训志孙国方赵甲高鹏
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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