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Contact cracking method and apparatus for heavy oil

A technology for contact cracking and heavy oil, applied in chemical instruments and methods, petroleum industry, chemical/physical processes, etc., can solve the problems of unsuitable processing, difficult cracking of inferior heavy oil, etc., to shorten the residence time, avoid cracking, and improve yield Effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a new heavy oil contact cracking method and a heavy oil contact cracking device implementing the method in order to overcome the defects that the traditional catalytic cracking process is difficult to crack inferior heavy oil and the traditional riser device is not suitable for processing inferior heavy oil

Method used

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  • Contact cracking method and apparatus for heavy oil
  • Contact cracking method and apparatus for heavy oil
  • Contact cracking method and apparatus for heavy oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] This example is used to illustrate the heavy oil contact cracking method of the present invention.

[0088] The heavy oil contact cracking unit used in this example is as follows: figure 1 As shown, in the heavy oil contact cracking unit, the bed reaction section is provided with two layers of feed nozzles 6, and each layer is provided with 6 feed nozzles, which are evenly distributed along the radial circumference of the reactor wall. The first layer of nozzles is located in the bed In the upper middle of the expanded diameter section between the layer reaction section 2 and the pre-lift section 1, the second layer of nozzles is located at the lower third of the bed layer reaction section 2, and the radial cross-sectional projection positions of the upper and lower layers of nozzles are evenly distributed; The height-to-diameter ratio of bed reaction section 2 is 3; the diameter ratio of bed reaction section 2 to riser reaction section 3 is 3:1; the diameter ratio of b...

Embodiment 2

[0098] This example is used to illustrate the heavy oil contact cracking method of the present invention.

[0099] The heavy oil contact cracking unit used in this example is as follows: figure 1 As shown, in the heavy oil contact cracking unit, the bed reaction section is provided with two layers of feed nozzles 6, and each layer is provided with 6 feed nozzles, which are evenly distributed along the radial circumference of the reactor wall. The first layer of nozzles is located in the bed In the upper middle of the expanded diameter section between the layer reaction section 2 and the pre-lift section 1, the second layer of nozzles is located at the lower third of the bed layer reaction section 2, and the radial cross-sectional projection positions of the upper and lower layers of nozzles are evenly distributed; The height-to-diameter ratio of bed reaction section 2 is 3; the diameter ratio of bed reaction section 2 to riser reaction section 3 is 5:1; the diameter ratio of b...

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Abstract

The invention relates to a contact cracking method for heavy oil, and the method is implemented in a heavy oil contact cracking apparatus which comprises a cracking case, a gasifier and a decoking method. The cracking case comprises pre-lifting section, a bed layer reaction section, a lifting pipe reaction section, a settling section and a steam stripping section. The method comprises the following steps: a contact agent is added into the pre-lifting section, and the contact agent enters into the bed layer reaction section through the pre-lifting section, and heavy oil and the contact agent are reacted by the cracking reaction in the bed layer reaction section and the lifting pipe reaction section in order, wherein, the moving speed of the contact agent in the pre-lifting section is faster than the moving speed of the contact agent in the bed layer reaction section. The moving speed of the material in the lifting pipe reaction section is faster than the moving speed of the material in the bed layer reaction section. The invention also relates to a heavy oil contact cracking apparatus for implementing the method. Using the heavy oil contact cracking apparatus and the contact cracking method for heavy oil provided by the invention can realize cracking processing of heavy oil, and mitigate reactor coking and improve light oil product yield.

Description

technical field [0001] The invention relates to a heavy oil contact cracking method and a heavy oil contact cracking device for implementing the heavy oil contact cracking method. Background technique [0002] my country is a country that is poor in oil and rich in coal. Crude oil is becoming increasingly heavy and inferior. Some heavy components in crude oil have high residual carbon and metal content. It is difficult to comprehensively utilize them efficiently by traditional processing methods. At present, the commonly used process for processing heavy oil is delayed coking. The reactor is a coking tower, and high-temperature heavy oil enters the reactor. Under the conditions of high reaction temperature and long reaction time, the heavy oil undergoes deep thermal conversion reaction to generate coking gas, Coker gasoline, coker diesel oil, heavy distillates (coker gas oil) and petroleum coke. There are three phases of gas, liquid and solid during the reaction in the reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/04C10J3/46C10J3/84B01J8/08
Inventor 朱丙田侯栓弟王子军张书红汪燮卿
Owner CHINA PETROLEUM & CHEM CORP