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A method for producing needle coke with combined process

A combined process and needle coke technology, which is applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of high thermal expansion system, unstable needle coke streamlined texture, etc., and achieve stable and reduced feed amount The effect of isotropic coke production and product quality improvement

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The needle coke prepared by the above method has shortcomings such as unstable streamlined texture and high thermal expansion system, and the comprehensive performance of needle coke needs to be further improved

Method used

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  • A method for producing needle coke with combined process
  • A method for producing needle coke with combined process
  • A method for producing needle coke with combined process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Catalytic oil slurry from a refinery was used as raw material, and the specific properties of the oil slurry are shown in Table 1. The temperature of the 10% distillation point of the light distillate oil on the 2nd column of the vacuum distillation unit is 220°C, the temperature of the 90% distillation point is 460°C, the temperature of the 10% distillation point of the heavy distillate oil at the bottom of the tower is 470°C, and the partial decompression light fraction The oil enters the hydrotreating unit 6 from the pipeline 4, and the catalyst bed of the hydrotreating unit is filled as follows: a total of four reactors in the unit are respectively filled with a protective agent, a metal removal agent, a desulfurizer and a denitrification agent, and the filling volume ratio is 5: 40:30:25, the hydrotreating process conditions are shown in Table 2; the liquid phase stream obtained after hydrotreating enters the hydrogenation fractionation tower 8 through the pipeline 7...

Embodiment 2

[0031] Catalytic oil slurry from a refinery was used as raw material, and the specific properties of the oil slurry are shown in Table 1. The temperature of the 10% distillation point of the light distillate on the 2nd column of the vacuum distillation unit is 300°C, the temperature of the 90% distillation point is 480°C, the temperature of the 10% distillation point of the heavy distillate at the bottom of the tower is 490°C, and part of the decompression light fraction The oil enters the hydrotreating unit 6 from the pipeline 4, and the catalyst bed of the hydrotreating unit is filled as follows: a total of four reactors in the unit are respectively filled with a protective agent, a metal removal agent, a desulfurizer and a denitrification agent, and the filling volume ratio is 5: 40:30:25, the hydrotreating process conditions are shown in Table 2; the liquid phase stream obtained after hydrotreating enters the hydrogenation fractionation tower 8 through the pipeline 7, separ...

Embodiment 3

[0033] Catalytic oil slurry from a refinery was used as raw material, and the specific properties of the oil slurry are shown in Table 1. The temperature of the 10% distillation point of the light distillate oil on the 2nd column of the vacuum distillation unit is 340°C, the temperature of the 90% distillation point is 500°C, the temperature of the 10% distillation point of the heavy distillate oil at the bottom of the tower is 510°C, and the partial decompression light fraction The oil enters the hydrotreating unit 6 from the pipeline 4, and the catalyst bed of the hydrotreating unit is filled as follows: a total of four reactors in the unit are respectively filled with a protective agent, a metal removal agent, a desulfurizer and a denitrification agent, and the filling volume ratio is 5: 40:30:25, the hydrotreating process conditions are shown in Table 2; the liquid phase stream obtained after hydrotreating enters the hydrogenation fractionation tower 8 through the pipeline ...

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Abstract

The invention discloses a method for producing needle coke with a combined process. The content of the method is as follows: light distillate oil and heavy distillate oil are fractionated from raw oil through a vacuum distillation device, and the heavy distillate oil goes out of the device. Hydrogen treatment device, the liquid phase product obtained after hydroprocessing passes through the fractionation device to at least separate hydrogenated light distillate oil and hydrogenated heavy distillate oil, and the hydrogenated heavy distillate oil is used as the material for forming the mesophase to be heated by the heating furnace a and then enters the coke tower , the coking gas generated by the coke tower passes through the coking fractionation tower to obtain coker wax oil, which is mixed with hydrogenated light distillate oil as a coke pulling material, heated by heating furnace b, and then enters the coke tower, and the coke tower completes the stages of mesophase formation and Needle focus is obtained after the focus pull stage. The method can continuously produce high-quality needle coke with stable performance.

Description

technical field [0001] The invention relates to a method for producing needle coke with a combined process, in particular to a method for continuously producing high-end needle coke with a combined process. Background technique [0002] Needle coke is mainly used to produce high-power and ultra-high-power graphite electrodes. With the development of the steel age, the output of steel scrap has gradually increased, which has promoted the development of electric furnace steel, and will inevitably increase the amount of graphite electrodes, especially high-power and ultra-high-power electrodes, and the demand for needle coke will also continue to increase. [0003] CN200810017110.3 discloses a method for preparing needle coke. The fraction or residual oil rich in aromatics is subjected to a delayed coking treatment with a certain temperature rise program, and then the obtained green coke is calcined to obtain a needle-shaped coke with a high mesophase content. Needle coke with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
CPCC10G69/00
Inventor 初人庆郭丹方向晨乔凯
Owner CHINA PETROLEUM & CHEM CORP
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