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Oily material suitable for producing needle coke as well as preparation method and system thereof

A technology of needle coke and oil quality, which is applied in the petroleum industry and the treatment of hydrocarbon oil, etc. It can solve the problems of short residence time, application limitations, difficulty in meeting the requirements of sulfur content in coking wax oil, etc., and achieve the effect of retaining content and reducing concentration

Active Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, since the oil slurry does not pass through the radiant section of the heating furnace, the temperature is relatively low and all the oil slurry is fed from the middle and upper parts, and the residence time is short, which prevents some colloids and asphaltenes from fully reacting and will be carried by oil and gas to coking The quality of the obtained needle coke raw material is affected in the wax oil; moreover, if the sulfur content in the catalytic cracking oil slurry is high, the sulfur content in the coker wax oil obtained is difficult to meet the requirements, so the application of this method is subject to considerable limits

Method used

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  • Oily material suitable for producing needle coke as well as preparation method and system thereof
  • Oily material suitable for producing needle coke as well as preparation method and system thereof
  • Oily material suitable for producing needle coke as well as preparation method and system thereof

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preparation example Construction

[0023] The first aspect of the present invention provides a method for preparing an oily material suitable for producing needle coke, the method comprising:

[0024] 1) Send the raw oil 1 to the fractionation tower 2 for fractionation treatment to obtain the crude wax oil component 5 and the fractionation tower bottom heavy oil component 6;

[0025] 2) The crude wax oil component 5 and the first steam 7 are sent to the first stripper 8 for the first stripping treatment to obtain the first stripped light components 9 and the first stripper bottom oil 10;

[0026] 3) The fractionation tower bottoms heavy oil component 6, the first stripper bottom oil 10 and the second steam 13 are sent to the second stripper 12 for the second stripping treatment to obtain the second stripped light group Point 15 and the second stripper bottom oil 14;

[0027] 4) The first stripping light component 9 and the second stripping light component 15 are separated into wax oil light component 19 rich ...

Embodiment 1

[0078] This example is used to illustrate the preparation method of the oily material suitable for producing needle coke according to the present invention.

[0079] use figure 1 The system shown performs the manufacturing process described below.

[0080] (1) Feedstock oil 1 is sent in fractionating tower 2, and fractionating condition is: fractionating tower top temperature is 126 ℃, and fractionating tower top pressure is 0.15MPa, and fractionating tower bottom temperature is 332 ℃ to carry out fractionation treatment, and Separate and obtain gasoline 3, diesel oil 4, crude wax oil component 5 (that is, distillate oil with a distillation range of 350-450° C.) and fractionation tower bottom heavy oil component 6;

[0081] (2) The fourth stripper bottom oil 27 that the crude wax oil component 5 and the tower bottom of the fourth stripper 24 is discharged merges to obtain mixed oil 28 and is sent to the first stripper 8 and enters the first The steam 7 is subjected to the fi...

Embodiment 2

[0088] This example is used to illustrate the preparation method of the oily material suitable for producing needle coke according to the present invention.

[0089] According to the method described in embodiment 1, the difference is:

[0090] In step (2), the conditions for the first stripping treatment include: the temperature is 330°C, the gauge pressure is 0.15MPa, and the residence time is 1.5h; the crude wax oil component 5, the fourth stripper bottom oil 27 and The weight ratio of the amount of the first steam 7 is 100:10:5;

[0091] In step (3), the conditions of the second stripping treatment include: the temperature is 350°C, the gauge pressure is 0.15MPa, and the residence time is 1h; The weight ratio is 100:5;

[0092] In step (4), the conditions for the third stripping treatment include: the temperature is 300°C, the gauge pressure is 0.12MPa, and the residence time is 1h; the weight ratio of the mixed oil 16 and the third steam 17 is 100:10;

[0093] In step ...

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Abstract

The invention relates to the field of needle coke preparation, in particular to an oily material suitable for producing needle coke and a preparation method and a system of the oily material. The method comprises the following steps: feeding raw oil into a fractionating tower for fractionating to obtain a crude wax oil component and a fractionating tower bottom heavy oil component; sending the crude wax oil component and steam into a stripping tower for first stripping treatment to obtain a first stripped light component and first stripping tower bottom oil; sending the fractionating tower bottom heavy oil component, the first stripping tower bottom oil and steam into a stripping tower for second stripping treatment to obtain a second stripping light component and second stripping tower bottom oil; separating the first stripping light component and the second stripping light component into a wax oil light component and a wax oil heavy component; and carrying out a condensation reaction on the wax oil light component to obtain a liquid-phase component rich in tricyclic and tetracyclic aromatic hydrocarbons. The method provided by the invention can effectively remove components which are not beneficial to production of needle coke in the raw oil, also can retain the content of aromatic hydrocarbon to the maximum extent, and can further reduce the concentration of aromatic hydrocarbon of more than five rings.

Description

technical field [0001] The invention relates to the field of needle coke preparation, in particular to an oily material suitable for producing needle coke and a preparation method and system thereof. Background technique [0002] Needle coke is the main raw material for producing high-power and ultra-high-power graphite electrodes. The price of high-quality needle coke is relatively high. It can be used as ultra-high-power graphite electrodes for electric furnace steelmaking, supercapacitors for electric vehicles, and lithium-ion electrodes for communication batteries. is widely used. The most critical influencing factor in the production of needle coke is the property of the raw material, the better the property of the raw material, the higher the grade of the needle coke product. It is generally required that the content of aromatics in the raw materials for the production of needle coke reaches 30-50% by weight, the content of colloids and asphaltenes is less than 1% by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G57/00
CPCC10G57/00C10G2300/1037
Inventor 阎龙申海平范启明刘自宾涂志强
Owner CHINA PETROLEUM & CHEM CORP