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Crude oil blending three-tank circulation process and its equipment

A crude oil and blending technology, applied in the field of blending process, can solve the problems of increased time and power consumption cost, increased crude oil emulsification, increased difficulty in dehydration, etc., to achieve the effects of increased equipment fluctuation, sufficient dehydration time, and avoidance of re-layering

Active Publication Date: 2017-06-20
中国石油天然气股份有限公司广西石化分公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, some large refineries in China (Dalian Petrochemical, Zhenhai Refining, Jinling Petrochemical, etc.) have different applications of crude oil blending technology, but due to the differences in their basic technical conditions, there are differences in the specific process. There are big differences, such as crude oil storage in principle, mixing measures, dehydration methods, etc., so there are also some problems: 1. Crude oil is blended first and then dehydrated, which increases the emulsification of crude oil and increases the difficulty of subsequent dehydration; 2. Due to process restrictions Secondary transfer, resulting in the need for secondary blending, resulting in increased time and power consumption costs; 3. A large number of storage tanks is required; 4. The continuity of production, the blending process will affect the unloading and tank dumping of crude oil

Method used

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  • Crude oil blending three-tank circulation process and its equipment

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Experimental program
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Effect test

Embodiment 1

[0036] exist figure 1 Among them, 3 target tanks: No. 1 target tank 1, No. 2 target tank 2, No. 3 target tank 3 are used for crude oil blending, 5 crude oil tanks: No. 1 crude oil tank 4, No. 2 crude oil tank 5, 3 Crude oil tank No. 6, No. 4 crude oil tank 7, and No. 5 crude oil tank 8 respectively store Dal Oil, Saudi Arabian Oil, Oman Oil, Iranian Light Oil and Saudi Light Oil, and their densities are: 890.0, 868.4, 866.8, 857.4 and 854.6kg / m 3 (20°C). The blending order, blending ratio and liquid level drop value of the five crude oils are as follows:

[0037] harmonic order 1 2 3 4 5 Crude Oil Varieties Dahl oil oil in sand Oman oil Iranian light oil Sand Light Oil Harmony ratio, wt 5.6％ 20.2％ 43.8％ 3.4％ 27.0％ Tank tag No. 1 crude oil tank No. 2 crude oil tank No. 3 crude oil tank No. 4 crude oil tank No. 5 crude oil tank Liquid level drop value, m 0.86 2.05 6.93 0.54 2.78

[0038] The total blending v...

Embodiment 2

[0048] exist figure 1 Among them, 3 target tanks: No. 1 target tank 1, No. 2 target tank 2, No. 3 target tank 3 are used for crude oil blending, 5 crude oil tanks: No. 1 crude oil tank 4, No. 2 crude oil tank 5, 3 Crude oil tank No. 6, No. 4 crude oil tank 7, and No. 5 crude oil tank 8 respectively store Dal Oil, Sand Oil, Oman Oil, Sand Light Oil and Upper Zakum Oil, and their densities are: 890.0, 868.4, 866.8, 854.6 and 850.9kg / m 3 (20°C). The blending order, blending ratio and liquid level drop value of the five crude oils are as follows:

[0049] harmonic order 1 2 3 4 5 Crude Oil Varieties Dahl oil oil in sand Oman oil Sand Light Oil Upper Zakum Oil Harmony ratio, wt 5.6％ 15.7％ 46.1％ 20.2％ 12.4％ Tank tag No. 1 crude oil tank No. 2 crude oil tank No. 3 crude oil tank No. 4 crude oil tank No. 5 crude oil tank Liquid level drop value, m 0.86 1.60 4.68 2.08 1.99

[0050] The total blending volume is 69,4...

Embodiment 3

[0060] exist figure 1 Among them, 3 target tanks: No. 1 target tank 1, No. 2 target tank 2, No. 3 target tank 3 are used for crude oil blending, 5 crude oil tanks: No. 1 crude oil tank 4, No. 2 crude oil tank 5, 3 Crude oil tank No. 6, No. 4 crude oil tank 7, and No. 5 crude oil tank 8 store Perinis, cocoa butter, Nile oil, Cabinda oil and Sahara oil respectively, and their densities are: 923.0, 872.5, 872.0 , 866.0 and 812.0kg / m 3 (20°C). The blending order, blending ratio and liquid level drop value of the five crude oils are as follows:

[0061] harmonic order 1 2 3 4 5 Crude Oil Varieties Pyrene oil cocoa butter nile oil cabinda oil sahara oil Harmony ratio, wt 18.0％ 14.6％ 12.4％ 21.3％ 33.7％ Tank tag No. 1 crude oil tank No. 2 crude oil tank No. 3 crude oil tank No. 4 crude oil tank No. 5 crude oil tank Liquid level drop value, m 2.68 2.28 1.94 2.17 4.78

[0062] The total blending volume is 69,420 tons...

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Abstract

The invention discloses a crude oil blending three-tank circulation process and its equipment. Three target tanks are selected, and each target tank independently completes the three crude oil blending steps of blending of crude oil, static settlement and feeding; according to the downstream device The processing volume needs to control the crude oil blending speed, so that the three target tanks are alternately in the state of blending, static settlement and feeding, and the static sedimentation time is 60-70 hours, so as to realize the three-tank cycle of crude oil blending; crude oil blending The steps are as follows: blending, static settlement, and feeding. The invention sends the dehydrated crude oil into the target tank from the lower part of the target tank in order of density from large to small, and uses the density difference characteristics of crude oil to continuously float the crude oil with low density to realize the effect of automatic sedimentation and mixing, so that The crude oil blends more evenly.

Description

technical field [0001] The invention relates to a blending process before crude oil processing in an oil refinery, in particular to a crude oil blending three-tank circulation process and equipment thereof. Background technique [0002] In recent years, with the increase in crude oil consumption, China's crude oil imports have also increased year by year, and the types of crude oil processed by refineries have gradually increased, ranging from a few to dozens of types. The diversification of crude oil types has broken the single crude oil processing technology. Requirements, it is required to be blended evenly before entering the device for processing, so as to ensure the stability of crude oil properties, so as to realize the safety, stability and maximum economic benefits of the processing process. However, since not all refineries have designed crude oil blending facilities at the beginning, it is difficult and expensive to carry out transformation on this basis. Whether ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F15/02B01F15/04C10G33/06C10G33/08
Inventor 胡于中戴琴荣张巍松杨旭李德新才德权周雪山平海宏王东韩兰生张建国
Owner 中国石油天然气股份有限公司广西石化分公司
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