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A kind of treatment method of catalytic cracking diesel oil

A technology of catalytic cracking diesel oil and treatment method, which is applied in the field of catalytic cracking diesel oil treatment, which can solve the problems of low initial boiling point of diesel oil, large overlapping degree of gasoline and diesel oil, and low extraction temperature, so as to improve gasoline yield and overlapping degree of gasoline and diesel oil Reduce, reduce the effect of diesel-gas ratio

Active Publication Date: 2021-11-09
SHANDONG CHAMBROAD PETROCHEMICALS CO LTD
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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 pipeline, then the rich absorption oil obtained in step (1) is mixed with the gas oil with a flow rate of 18t / h as 29t / h, and the mixing temperature of the 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

[0043] ...

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 for catalytic cracking diesel oil, comprising the following steps: a) mixing diesel oil with rich absorption oil to obtain blended diesel oil; b) stripping the blended diesel oil obtained in step a) to obtain diesel product and gas phase components; c) separating the gas phase components obtained in step b) from gasoline and diesel oil to obtain diesel oil and gasoline products; the diesel oil repeats the process of step a). Compared with the prior art, the treatment method provided by the present invention no longer transports the rich absorption oil from the top of the fractionation tower to the fractionation tower, but mixes it with the diesel oil extracted from the fractionation tower for the production of diesel products, thereby improving both The nature of diesel oil is conducive to the generation of diesel products, and it also prevents the low-temperature rich absorption oil from lowering the initial boiling point of diesel oil in the fractionating tower, which increases the overlapping degree of gasoline and diesel oil; it can be reduced under the premise of ensuring that diesel products are qualified. The overlapping degree of gasoline and diesel will reduce the diesel-gasoline ratio and increase the output of high value-added products.

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 Patents(China)
IPC IPC(8): C10G53/00
CPCC10G53/00C10G2400/02C10G2400/04
Inventor 付明义马庆鲁栾波
Owner SHANDONG CHAMBROAD PETROCHEMICALS CO LTD
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