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Heavy oil catalytic cracking method and device

A heavy oil catalysis and catalytic cracking technology, 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, and achieve the goal of increasing the total conversion rate and reducing dry gas and coke The effect of generating and meeting market demand

Inactive Publication Date: 2017-07-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Heavy oil catalytic cracking method and device
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  • Heavy oil catalytic cracking method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0054] Oil and gas separation system, which is equipped with an inlet for oil and gas and catalyst mixture, an oil and gas outlet and a catalyst outlet;

[0055] The main fractionation tower 106 is provided with respective inlets, the upper part is provided with multiple light component outlets, and the lower part is provided with a refining outlet and an oil slurry outlet;

[0056] The catalytic hydrogenation conversion device 201, the catalytic hydrogenation conversion device 201 is provided with a catalytic hydrogenation conversion device inlet and a catalytic hydrogenation conversion device outlet;

[0057] A sub-fractionation tower 202, the sub-fractionation tower 202 is provided with a sub-fractionati...

Embodiment 2

[0075] The heavy oil catalytic cracking method provided in this example is used as figure 2 The device shown. Different from the catalytic cracking unit in Embodiment 1, the unit in this embodiment also includes an extraction tower 301, which has an extraction tower inlet, a deoiled asphalt outlet, and a deasphalted oil outlet. The extraction tower inlet The slurry outlet of the main fractionation tower 106 is connected, and the deasphalted oil outlet is connected to the inlet of the catalytic hydroconversion device 201.

[0076] The method of using the device provided in this embodiment for catalytic cracking of heavy oil is different from the method in Example 1 in that the oil slurry 9 is extracted from the bottom of the main fractionator 106 and used for the extraction of asphaltenes from the slurry. After the solvent 26 is mixed, it enters the extraction tower 301 for deasphalting treatment. The extraction solvent 26 is selected from C3-C6 alkanes or their mixed fractions. ...

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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 in stages and zones, and belongs to the technical field of petroleum processing. Background technique [0002] With the continuous development and progress of the oil refining industry, the catalytic cracking process of heavy oil requires an increase in 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 future refinery, the catalytic device will no longer be a device that directly produces the final product. Gasoline and diesel produced by catalytic cracking must be refined to improve product quality to meet the latest environmental protection requirements. In spite of many challenges, catalytic cracking technology is still innovating and developing, especially when combined with o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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)