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A method for preparing needle coke raw material

A technology for needle coke raw materials and raw materials, which can be applied to coking carbon-containing materials, coke ovens, petroleum industry, etc., can solve problems such as affecting the quality of needle coke, difficulty in needle coke products, and large investment.

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires a separate filter and vacuum distillation device, which requires a large investment, and the needle coke raw material obtained by this method still contains a certain amount of colloid, which will affect the quality of needle coke and produce high-grade needle coke products. more difficult

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

Experimental program
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Effect test

preparation example Construction

[0017] According to the method for preparing needle coke raw material of the present invention, the method comprises injecting part of the delayed coking raw material and catalytic cracking oil slurry into the lower part of the coking fractionation tower, and injecting the fractionation tower bottom containing the partial delayed coking raw material and catalytic cracking oil slurry into The oil is injected into the upper part of the coke tower, and another part of the delayed coking raw material is injected into the bottom of the coke tower after being heated by the radiant section of the heating furnace, and the delayed coking reaction is carried out, and the oil and gas produced by the delayed coking reaction are fractionated to obtain the wax oil component, and the obtained The wax oil component is steam stripped to obtain needle coke raw materials; wherein, during the delayed coking reaction process, cooling oil and / or cooling water are injected into the top of the coke tow...

Embodiment 1

[0052] This example is used to illustrate the preparation method of the needle coke raw material provided by the present invention.

[0053] This embodiment adopts figure 1 process shown. The ratio of vacuum residue 1 (i.e. delayed coking raw material, whose relevant parameters are shown in Table 1) to catalytic cracking oil slurry 9 (related parameters are shown in Table 1) is 75:25; in addition, the vacuum residue 1 Based on the total weight of the heating furnace, the convection section 4 and the radiation section 5 are heated successively, and then the consumption of the vacuum residue 1 entering the bottom of the coke drum is 90% by weight.

[0054] After heat exchange between delayed coking raw material 1 and coker diesel oil, coker wax oil and coker heavy wax oil ( figure 1 (not marked in ) is divided into two paths, one path passes through the convection section 4 and the radiation section 5 of the heating furnace in turn to be heated to 500°C, and then enters the bo...

Embodiment 2

[0060] This example is used to illustrate the preparation method of the needle coke raw material provided by the present invention.

[0061] Adopt the method of embodiment 1 to carry out, difference is: the ratio of vacuum residue oil and catalytic cracking oil slurry is 70:30; 501°C; the pressure of the coke tower is 0.16MPa; the sum of the non-catalytic cracking oil slurry and delayed coking raw material components in the fractionation tower bottom oil and the catalytic cracking oil slurry and delayed coking raw material components contained in the fractionation tower bottom oil The weight ratio is 0.25: 1; the length of the feed position on the coke drum from the lower end of the cylinder accounts for 9 / 10 of the entire cylinder length; replace the cooling oil with the same amount of cooling water (the same amount of cooling water contains desulfurization and denitrification catalysts in the same amount as the cooling oil), so that the weight ratio of the total amount of co...

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Abstract

The invention discloses a method for preparing a needle coke raw material. The method comprises pouring a part of a delayed coking raw material and catalytic cracking oil slurry into the lower part of a coking fractionating tower, feeding the fractionating tower bottom oil containing the part of delayed coking raw material and the catalytic cracking oil slurry into the upper part of a coke tower, heating the other part of the delayed coking raw material through a heating furnace radiation section, feeding the heated delayed coking raw material into the bottom of the coke tower, carrying out delayed coking, carrying out fractionation on the oil gas produced by the delayed coking reaction to obtain a wax oil component, and carrying out steam stripping on the wax oil component to obtain the needle coke raw material, wherein in the delayed coking reaction, cooling oil and / or cooling water is fed into the top of the coke tower through pipes, steam is injected into the bottom of the coke tower, the pipes for feeding the cooling oil and / or cooling water stretch into the coke tower and the cooling oil and / or cooling water contains desulfuration and denitrification catalysts.

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, and it can be widely used as ultra-high-power graphite electrodes for electric furnace steelmaking, supercapacitors for electric vehicles, and lithium-ion electrodes for communication batteries. 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%. A lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00
Inventor 阎龙申海平刘自宾范启明
Owner CHINA PETROLEUM & CHEM CORP