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Treatment method of catalytic cracking diesel oil

A technology for catalytically cracked diesel oil and a treatment method, which is applied to the treatment field of catalytically cracked diesel oil, can solve the problems of large overlap of gasoline and diesel, low initial boiling point of diesel, low extraction temperature, etc., so as to reduce the overlap of gasoline and diesel and improve gasoline production. rate, the effect of reducing the diesel-gasoline ratio

Active Publication Date: 2019-09-17
SHANDONG JINGBO PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the rich absorption oil exchanges heat with the outgoing diesel product, so the extraction temperature of diesel oil is still lower than that of diesel oil, which results in a large overlap of gasoline and diesel oil in the fractionation tower, and a relatively low initial boiling point of diesel oil, resulting in high value-added products. gasoline as diesel product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Divide the catalytic cracking diesel oil into two pipelines after being extracted from the fractionation tower, one is a diesel pipeline, which is used to send the gas oil to the diesel stripper for stripping; After separation, the obtained rich absorbent oil enters the rich absorbent oil pipeline.

[0041] (2) the rich absorption oil pipeline is merged into the diesel oil pipeline, then the rich absorption oil obtained in step (1) is mixed with the gas oil that the flow rate of 18t / h is 29t / h, and the mixing temperature of the described rich absorption oil is 143°C to 148°C to obtain mixed diesel, and then send the mixed diesel to a diesel stripper at a flow rate of 47t / h for stripping at 170°C and 0.13MPa to obtain diesel products and gas phase components respectively; wherein, Described diesel product is sent out, and its property is shown in table 1;

[0042] The property data of the diesel product that table 1 embodiment of the present invention 1 generates

...

Embodiment 2

[0052] (1) Divide the catalytic cracking diesel oil into two pipelines after being extracted from the fractionation tower, one is a diesel pipeline, which is used to send the gas oil to the diesel stripper for stripping; After separation, the obtained rich absorbent oil enters the rich absorbent oil pipeline.

[0053] (2) The rich absorption oil pipeline is merged into the diesel pipeline, then the rich absorption oil obtained in step (1) is mixed with the gas oil of 22t / h with a flow rate of 18t / h, and the mixing temperature of the rich absorption oil is 145°C to 148°C to obtain mixed diesel, and then send the mixed diesel to a diesel stripper at a flow rate of 40t / h for stripping at 165°C and 0.13MPa to obtain diesel products and gas phase components respectively; wherein, Described diesel product is sent out, and its property is shown in table 2;

[0054] The property data of the diesel product that table 2 embodiment of the present invention 1 generates

[0055] ...

Embodiment 3

[0064] (1) Divide the catalytic cracking diesel oil into two pipelines after being extracted from the fractionation tower, one is a diesel pipeline, which is used to send the gas oil to the diesel stripper for stripping; After separation, the obtained rich absorbent oil enters the rich absorbent oil pipeline.

[0065] (2) The rich absorption oil pipeline is merged into the diesel pipeline, then the rich absorption oil obtained in step (1) is mixed with the gas oil with a flow rate of 18t / h and a flow rate of 41.5t / h, and the mixing temperature of the rich absorption oil is 146°C to 148°C to obtain blended diesel oil, and then send the blended diesel oil to a diesel stripper at a flow rate of 59.5t / h for stripping at 174°C and 0.13MPa to obtain diesel product and gas phase components respectively; Wherein, the diesel product is delivered, and its properties are shown in Table 3;

[0066] The property data of the diesel product that table 3 embodiment of the present invention 1...

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Abstract

The invention provides a treatment method of catalytic cracking diesel oil. The treatment method comprises the following steps: a) mixing diesel oil with rich absorption oil so as to obtain mixed diesel oil; b) carrying out steam stripping on the mixed diesel oil obtained in the step a) so as to respectively obtain a diesel oil product and a gas phase component; and c) carrying out gasoline-diesel oil separation on the gas phase component obtained in the step b) so as to obtain diesel oil and a gasoline product, and repeating the step a) on the diesel oil. Compared with the prior art, the treatment method provided by the invention has the operation that the rich absorption oil is not conveyed back into a fractionating tower from the top of the fractionating tower any longer, but is mixed with diesel oil which is sucked out from the fractionating tower and used for producing a diesel oil product instead, so that the property of the diesel oil is improved, generation of the diesel oil product is facilitated, and the situation that the initial boiling point of the diesel oil is reduced and the overlapping degree of gasoline-diesel oil is increased as the absorption rich oil of a low temperature is retained in the fractionating tower is avoided; and on premise that the diesel oil product is qualified, the overlapping degree of the gasoline-diesel oil is reduced, the ratio of diesel oil to gasoline is reduced, and the yield of a high additional value product is increased.

Description

technical field [0001] The invention relates to the technical field of petroleum refining and processing, and more specifically relates to a treatment method for catalytic cracking diesel oil. Background technique [0002] Conventional catalytic cracking units generally use diesel oil as a reabsorbent, mainly using the similar miscibility principle of the two substances to absorb the gasoline components carried by the lean gas from the top of the absorption tower with the help of diesel oil, and the diesel oil that absorbs gasoline components (commonly known as rich absorption oil) is discharged from the bottom of the tower and returned to the fractionating tower from the top of the fractionating tower, and then the re-separation of gasoline and diesel is realized in the fractionating tower. [0003] However, the rich absorption oil exchanges heat with the outgoing diesel product, so the extraction temperature of diesel oil is still lower than that of diesel oil, which resul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/00
CPCC10G53/00C10G2400/02C10G2400/04
Inventor 付明义马庆鲁栾波
Owner SHANDONG JINGBO PETROCHEM
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