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Catalytic cracking method of heavy oil and device thereof

A technology of catalytic cracking and heavy oil catalysis, which is applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil treatment products, etc., can solve the problems of light harvesting and no advantages of catalytic cracking technology, improve the total conversion rate, meet market demand, and facilitate operation Effect

Inactive Publication Date: 2016-04-20
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, relevant industrial production data show that: in the catalytic cracking products with Daqing vacuum residue as the main raw material (residue ratio 85%), when the conversion rate reaches 76%, the coke yield reaches 11%, and the dry gas, oil The total yield of pulp and coke exceeds 20%. Compared with the coking process, the catalytic cracking technology with high conversion rate has no advantage in light yield
[0006] In summary, there is still room for improvement in the existing catalytic cracking methods for heavy oil. How to increase the conversion rate of heavy oil raw materials while increasing the yield of light oil and liquid yield, and at the same time reduce the low added value of dry gas, liquefied gas and coke as much as possible. Product yield has become an urgent problem to be solved

Method used

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  • Catalytic cracking method of heavy oil and device thereof
  • Catalytic cracking method of heavy oil and device thereof
  • Catalytic cracking method of heavy oil and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The heavy oil catalytic cracking method provided in this example uses such as figure 1 device shown. The device includes at least:

[0053] The first riser 101 and the second riser 304 have a raw material inlet and a catalyst inlet respectively at the bottom, and an outlet at the top;

[0054] An oil-gas separation system, which is provided with an oil-gas and catalyst mixture inlet, an oil-gas outlet, and a catalyst outlet;

[0055] The main fractionation column 106 is provided with inlets respectively, the upper part is provided with a plurality of light component outlets, and the lower part is provided with a return refining oil outlet and an oil slurry outlet;

[0056] Catalytic hydroconversion unit 201, the catalytic hydroconversion unit 201 is provided with a catalytic hydroconversion unit inlet and a catalytic hydroconversion unit outlet;

[0057] A sub-fractionator 202, the sub-fractionator 202 is provided with a sub-fractionator inlet, a catalytically hydrog...

Embodiment 2

[0075] The heavy oil catalytic cracking method provided in this example uses such as figure 2 device shown. Different from the catalytic cracking device in Example 1, the device of this embodiment also includes: an extraction tower 301, the extraction tower 301 has an extraction tower inlet, a deoiled bitumen outlet and a deasphalted oil outlet, and the extraction tower inlet The oil slurry outlet of the main fractionation tower 106 is connected, and the deasphalted oil outlet is connected with the inlet of the catalytic hydroprocessing unit 201 .

[0076] The difference between the method for heavy oil catalytic cracking using the device provided in this example and the method in Example 1 is that after the oil slurry 9 is drawn from the bottom of the main fractionation tower 106, it is used for the extraction of asphaltenes in the oil slurry. After the solvent 26 is mixed, it enters the extraction tower 301 for deasphalting treatment. The extraction solvent 26 is selected ...

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Abstract

The invention provides a catalytic cracking method of heavy oil and a device thereof. A reactor adopted in the method comprises a first riser and a second riser. The method comprises the following steps: a heavy oil raw material and a catalytic cracking catalyst enter the first riser from the lower part and are contacted with each other in the first riser and go upwards to carry out a first catalytic cracking reaction; reaction oil-gas from the first riser undergoes fractionation to obtain cracking gas, gasoline, diesel oil, recycle oil and slurry; the recycle oil undergoes a catalytic hydrogenation reaction at the temperature of 340-380 DEG C, at the volume space velocity of 0.5-2.0 h<-1>, at the hydrogen-to-oil volume ratio of 300-800 and at the reaction pressure of 7-12 MPa, and oil-gas generated by the catalytic hydrogenation reaction undergoes fractionation to obtain cracking gas, gasoline, diesel oil and catalytic hydrogenation heavy oil; and the catalytic hydrogenation heavy oil is introduced into the second riser to carry out a secondary catalytic cracking reaction, and the reaction oil-gas from the second riser and the reaction oil-gas from the first riser are merged to undergo fractionation. According to the invention, maximum yield of light oil products and high value-added chemical materials can be realized, and utilization rate of heavy oil raw material is raised.

Description

technical field [0001] The invention relates to a method and device for catalytic cracking of heavy oil, in particular to a method and device for catalytic cracking of heavy oil raw materials by classification and division, and belongs to the technical field of petroleum processing. Background technique [0002] With the continuous development and progress of the oil refining industry, heavy oil catalytic cracking processing requires increasing the output of high value-added products, while reducing the output of low value-added products such as dry gas, liquefied gas and coke as much as possible. In the refinery of the future, the catalytic unit will no longer be the unit that directly produces the final product. Gasoline and diesel produced by catalytic cracking must be refined to improve product quality in order to meet the latest environmental protection requirements. Despite many challenges, catalytic cracking technology is still innovating and developing, especially t...

Claims

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Application Information

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IPC IPC(8): C10G69/04C10G69/00
CPCC10G69/00C10G69/04C10G2300/1037C10G2300/70C10G2400/02C10G2400/04C10G2400/26
Inventor 高金森王刚王成秀蓝兴英徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)