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Method and system for preparing petroleum coke from catalytic oil slurry and ethylene tar

A technology for ethylene tar and catalytic oil slurry, which is used in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc. Deep condensed to avoid the effect of producing soft focus

Active Publication Date: 2022-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after ethylene tar is distilled, the residual oil at >350°C is often solid or gelatinous, which is difficult to further process; moreover, when the extracted oil is heated to above 480°C in a heating furnace, violent reactions will occur, causing furnace tube Severe coking is not conducive to long-term operation of the device

Method used

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  • Method and system for preparing petroleum coke from catalytic oil slurry and ethylene tar
  • Method and system for preparing petroleum coke from catalytic oil slurry and ethylene tar
  • Method and system for preparing petroleum coke from catalytic oil slurry and ethylene tar

Examples

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Effect test

Embodiment 1

[0039] Embodiment 1 adopts the technological process of the present invention, and the catalytic oil slurry and the vacuum residue are mixed at the bottom of the vacuum distillation tower with a mass ratio of 3:1, and the 95% distillation temperature of the obtained extracted oil is 501 ° C; The hydrogen is mixed and sent to the hydrogenation reaction unit to obtain the hydrogenated heavy distillate oil; the hydrogenated heavy distillate oil and the ethylene tar are sent to the delayed coking unit according to the mass ratio of 1:0.15, and the outlet temperature of the hydrogenated heavy distillate oil heating furnace is 493 ℃ , the outlet temperature of the ethylene tar heating furnace is 298 ℃, when the feeding time reaches 30% of the reaction cycle, the feeding of ethylene tar is stopped, and the hydrogenated heavy distillate oil is separately fed into the delayed coking tower, and the delayed coking reaction adopts a constant pressure operation process; The oil and gas are ...

Embodiment 2

[0041] Embodiment 2 adopts the technological process of the present invention, and the difference from Example 1 is: the hydrogenated heavy distillate oil and the ethylene tar are sent to the delayed coking unit together according to the mass ratio of 1:0.2, and the hydrogenated heavy distillate oil heating furnace outlet The temperature is 495°C, and the outlet temperature of the ethylene tar heating furnace is 320°C. When the feeding time reaches 25% of the reaction period, the feeding of ethylene tar is stopped, and the hydrogenated heavy distillate oil is separately fed into the delayed coking tower. The delayed coking reaction adopts the pressure swing operation process. , when the feeding time reaches 50% of the reaction cycle, the coke drum pressure is released at a rate of 0.5MPa / h. The specific reaction conditions are shown in Table 2. The product distribution and coke sulfur content analysis results are shown in Table 3.

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Abstract

The invention discloses a method and system for preparing petroleum coke from catalytic oil slurry and ethylene tar. The method includes the following contents: the catalytic oil slurry is desolidified to obtain extraction oil and tail oil, and the extraction oil is subjected to hydrogenation treatment , the reaction product is separated and the hydrogenated heavy distillate oil and ethylene tar are respectively heated and then sent to the delayed coking unit for reaction. When the reaction time reaches 1% to 50% of the entire reaction cycle, the ethylene tar feed is stopped and the coking reaction product Gas, light oil and heavy oil are obtained after separation; the light oil is polymerized, mixed with hydrogenated heavy distillate oil, heated and then sent to the delayed coking unit for reaction, and the heavy oil is recycled back to be mixed with catalytic oil slurry for desolidification treatment. The method can produce low-sulfur petroleum coke in a maximum amount by organically combining the two raw materials, and the production device can run stably for a long period.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing, in particular to a method for preparing low-sulfur petroleum coke. Background technique [0002] Catalytic oil slurry and ethylene tar have high aromatic carbon rate. When they are used as raw materials to produce fuel oil, the obtained fuel oil is of poor quality and difficult to refine. However, they are rich in a large number of condensed aromatic hydrocarbons that are easily polycondensed to form coke through thermal reaction, which is a high-quality raw material for producing petroleum coke. With the de-capacity of my country's steel industry and the development of new energy vehicles and other industries, the demand for low-sulfur petroleum coke is increasing. [0003] CN103789028A, CN104560152A and the like disclose methods for producing needle coke using catalytic oil slurry, and needle coke belongs to special low-sulfur petroleum coke. Compared with needle coke, ordinary l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
CPCC10G69/00C10G2300/70
Inventor 陈天佐郭丹初人庆乔凯
Owner CHINA PETROLEUM & CHEM CORP
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