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A method for preparing needle coke raw material

A technology for needle coke raw materials and raw materials, which is applied in the field of preparing needle coke raw materials, can solve the problems of application limitation, short residence time, and reduction of needle coke raw material output, etc.

Active Publication Date: 2017-08-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 makes some colloids and asphaltenes unable to fully react and will be carried by oil and gas to the coking wax. On the other hand, if the sulfur content in the raw oil slurry is high, the sulfur content in the coker wax oil is difficult to meet the requirements, so the application of this method is quite limited
In addition, the main reactor of delayed coking is the coke tower, in which the raw materials are converted into oil gas and coke. In the traditional delayed coking process, a large amount of aromatic components are converted into coke before leaving the coke tower, which will reduce the output of needle coke raw materials

Method used

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  • A method for preparing needle coke raw material
  • A method for preparing needle coke raw material
  • A method for preparing needle coke raw material

Examples

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preparation example Construction

[0014] According to the method for preparing needle coke raw material of the present invention, it comprises injecting the mixed raw material heated by the radiant section of the heating furnace into the coke tower for delayed coking reaction, and fractionating the oil and gas produced by the delayed coking reaction to obtain the wax oil component; Wherein, the mixed raw material contains catalytic cracking oil slurry and delayed coking raw material. During the delayed coking reaction process, cooling oil and / or cooling water are injected through pipelines at the top of the coke tower, steam is injected at the bottom of the coke tower, and cooling Oil and / or cooling water pipelines extend into the coke drum, and the sulfur content of the catalytic cracking oil slurry is below 0.7 wt%.

[0015] According to the present invention, the sulfur content of the catalytic cracking oil slurry is less than 0.7% by weight, preferably in the range of 0.1-0.6% by weight, more preferably in ...

Embodiment 1

[0039] This example is used to illustrate the preparation method of the needle coke raw material provided by the present invention.

[0040] This embodiment adopts figure 1 process shown. Coking raw material vacuum residue 1 (relevant parameters are shown in Table 1) and catalytic cracking oil slurry 2 (relevant parameters are shown in Table 1) are mixed in the ratio of 75:25 in mixer 3, and then mixed with coking diesel oil , coking mid-stage oil, coking wax oil, and coking heavy wax oil are heat-exchanged in turn (the heat exchange is not shown in the figure) and enter the convection section 4 of the heating furnace for preheating. In the lower part of the tower, the high-temperature oil gas 12 from the coke tower 6 exchanges heat with the upper feed of raw oil and the coking heavy wax oil 17. The liquid phase stream formed after heat exchange is mixed with the lower feed of the raw oil at the bottom of the fractionation tower to form the bottom oil 8 of the fractionation t...

Embodiment 2

[0046] This example is used to illustrate the preparation method of the needle coke raw material provided by the present invention.

[0047] Adopt the method of embodiment 1 to carry out, difference is: vacuum residue and catalytic cracking oil slurry are mixed according to the ratio of 70:30 in mixer; Heating furnace outlet temperature is 496 ℃; Coke tower pressure is 0.16MPa; The ratio is 0.25:1; the length of the coke tower feed position from the lower end of the cylinder accounts for 9 / 10 of the entire cylinder length; the same amount of the cooling water is used to replace the cooling oil, and the injection amount of the cooling water is the same as The total injection amount of the cooling water and the cooling oil in Example 1 is the same. Table 2 shows the final distribution of products and the properties of the obtained needle coke raw materials.

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Abstract

The invention discloses a method for preparing needle coke raw materials. The method comprises injecting mixed raw materials heated by the radiant section of a heating furnace into a coke tower for delayed coking reaction, and fractionating the oil and gas produced by the delayed coking reaction to obtain wax oil Component; wherein, the mixed raw material contains catalytic cracking oil slurry and delayed coking raw material, during the delayed coking reaction process, inject cooling oil and / or cooling water through pipelines at the top of the coke tower, and inject steam at the bottom of the coke tower, And the pipeline for injecting cooling oil and / or cooling water extends into the coke drum, and the sulfur content of the catalytic cracking oil slurry is less than 0.7% by weight. The method of the invention can effectively utilize catalytic cracking oil slurry and reduce coke in the process, thereby increasing the output of needle coke raw materials.

Description

technical field [0001] The invention relates to a method for preparing needle coke raw materials. 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 should reach 30%-50%, the content of colloids and asphaltenes should be less than 1%, the content of ash should be less than 100ug / g, and the content of sulfur should be less than 0.5%. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/04
Inventor 阎龙申海平王子军范启明刘自宾
Owner CHINA PETROLEUM & CHEM CORP