CN219526551U - Gasoline component recycling system in catalytic cracking gasoline hydrogenation device - Google Patents
Gasoline component recycling system in catalytic cracking gasoline hydrogenation device Download PDFInfo
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- CN219526551U CN219526551U CN202320274142.1U CN202320274142U CN219526551U CN 219526551 U CN219526551 U CN 219526551U CN 202320274142 U CN202320274142 U CN 202320274142U CN 219526551 U CN219526551 U CN 219526551U
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Abstract
The utility model provides a gasoline component recycling system in a catalytic cracking gasoline hydrogenation device. The utility model comprises a light gasoline fractionating tower, a first reflux tank, a first reflux pump, a prefractionator, a second reflux tank, a second reflux pump, a heavy gasoline pipeline and a light gasoline pipeline; the heavy gasoline pipeline is provided with a delivery pump, the other end of the heavy gasoline pipeline is provided with a first branch pipeline and a second branch pipeline, the other end of the first branch pipeline is connected with a feed pipe of the heavy gasoline selective hydrodesulfurization reaction system, and the other end of the second branch pipeline is connected with a raw material buffer tank of the diesel hydro-upgrading device; the input end of the light gasoline pipeline is arranged between the light gasoline fractionating tower and the first reflux pump, the other end of the light gasoline pipeline is provided with a third branch pipeline and a fourth branch pipeline, and the other end of the fourth branch pipeline is provided with a fifth branch pipeline and a sixth branch pipeline. The utility model has reasonable layout, realizes the full recycling of gasoline components, has reasonable product structure and improves comprehensive economic benefit.
Description
Technical Field
The utility model relates to the technical field of gasoline refining equipment, in particular to a gasoline component recycling system in a catalytic cracking gasoline hydrogenation device.
Background
The gasoline is subjected to hydrogenation treatment to obtain catalytic cracking gasoline, and the catalytic cracking gasoline is cut and separated into light and heavy components or light and medium and heavy components, and the heavy components are subjected to selective hydrodesulfurization. Therefore, the hydrodesulfurization of gasoline is an important technological process of an oil refinery, and is to carry out secondary processing on catalytic gasoline, remove sulfur, nitrogen, oxygen and other impurities in the catalytic gasoline, and produce a gasoline product meeting the national quality standard.
The existing gasoline hydrodesulfurization system sends heavy gasoline at the bottom of a fractionating tower to a desulfurization reaction system for desulfurization, denitrification and deoxidation, wherein partial olefin saturation is accompanied in the process, partial octane number loss is accompanied by olefin saturation, and when an upstream device runs at a low load, the product structure adjustment of a downstream oil refining device is not beneficial to optimization, so that the comprehensive energy consumption of the device is increased, and the material and energy unbalance of the whole plant are inevitably caused, thereby influencing the whole economic benefit of the whole plant.
Disclosure of Invention
The utility model aims to provide a gasoline component recycling system in a catalytic cracking gasoline hydrogenation device, and aims to solve the problems of high octane number loss, high comprehensive energy consumption, difficult product structure adjustment and low economic benefit of a gasoline hydrodesulfurization system in the prior art.
In order to solve the technical problems, the technical scheme of the utility model is realized as follows:
the utility model relates to a gasoline component recycling system in a catalytic cracking gasoline hydrogenation device, which comprises a light gasoline fractionating tower, a first reflux tank, a first reflux pump, a prefractionator, a second reflux tank, a second reflux pump, a heavy gasoline pipeline and a light gasoline pipeline; the light gasoline fractionating tower is characterized in that the input end of the light gasoline fractionating tower is connected with a catalytic cracking gasoline hydrogenation device, the top of the light gasoline fractionating tower is connected with the first reflux tank, the output end of the first reflux tank is connected with the first reflux pump, and the output end of the first reflux pump is connected with the light gasoline fractionating tower; the input end of the prefractionator is connected with the bottom of the light gasoline fractionating tower, the top of the prefractionator is connected with the second reflux tank, the output end of the second reflux tank is connected with the second reflux pump, and the output end of the second reflux pump is connected with the prefractionator; one end of the heavy gasoline pipeline is connected with the bottom of the prefractionator, a delivery pump is arranged on the heavy gasoline pipeline, a first branch pipeline and a second branch pipeline are arranged at the other end of the heavy gasoline pipeline, the other end of the first branch pipeline is connected with a feed pipe of a heavy gasoline selective hydrodesulfurization reaction system, and the other end of the second branch pipeline is connected with a raw material buffer tank of a diesel hydro-upgrading device; the input end of the light gasoline pipeline is arranged between the light gasoline fractionating tower and the first reflux pump, a third branch pipeline and a fourth branch pipeline are arranged at the other end of the light gasoline pipeline, the third branch pipeline is used for sending light gasoline outwards, a fifth branch pipeline and a sixth branch pipeline are arranged at the other end of the fourth branch pipeline, a light gasoline etherification pipeline is connected to the other end of the fifth branch pipeline, and a light gasoline sweetening pipeline is connected to the other end of the sixth branch pipeline.
As a preferred embodiment, the second branch line includes a connecting line, a common line, a bypass line, and a connecting line in this order, and the fifth branch line is connected to the light gasoline etherification line through the common line.
As a preferred embodiment, the junction of the bypass line and the connecting line is also connected to a catalytic diesel line at the output of the catalytic cracker.
As a preferred embodiment, the first branch pipe is provided with a first valve, the connecting pipeline is sequentially provided with a second valve and a third valve, the bypass pipeline is provided with a fourth valve, and the connecting pipeline is provided with a fifth valve; the light gasoline etherification pipeline is provided with a tenth valve.
As a preferred embodiment, the transfer pump is connected to a controller, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, and the tenth valve are all solenoid valves, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, and the tenth valve are all connected to the controller.
As a preferred embodiment, the first valve, the fifth valve and the sixth valve are self-regulating control valves.
As a preferred embodiment, the delivery pump is a variable frequency pump.
As a preferred embodiment, the fifth valve is a medium pressure valve, and the pressure level of the fifth valve is PN4.0.
As a preferred embodiment, the second branch line is a seamless steel pipe.
As a preferred embodiment, the second branch line is steel No. 20.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, two branches are arranged on the heavy gasoline pipeline, heavy gasoline is conveyed into a system of the diesel hydro-upgrading device through the second branch pipeline, so that the recycling of heavy gasoline components in the diesel hydro-upgrading device is realized, the diesel hydro-upgrading device produces more naphtha as a raw material of the reforming device, the yield of reformed chemical products is increased, the defect of unbalanced materials and energy of the whole plant caused by low-load operation of the whole plant is overcome, and the comprehensive economic benefit is improved; meanwhile, three branches are arranged on the light gasoline pipeline, one part of light gasoline is used for sending, the other part of light gasoline enters a light gasoline etherification system for etherification, and the other part of light gasoline enters a light gasoline sweetening pipeline for sweetening treatment, so that the full utilization of light gasoline components is realized; the gasoline component recycling system has reasonable layout, ingenious design, convenient control, safety and reliability.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic plan view of an embodiment of a gasoline component recycling system in a catalytic cracking gasoline hydrogenation apparatus according to the present utility model;
in the figure: 10-a light gasoline fractionating tower; 11-a first reflux drum; 12-a first reflux pump; 13-light gasoline pipeline;
20-prefractionation column; 21-a second reflux drum; 22-a second reflux pump; 23-heavy gasoline pipeline; 24-a delivery pump;
31-a first branch line; 32-connecting the pipelines; 33-common line; 34-bridging the pipeline; 35-connect line; 36-a third branch line; 37-a fifth branch line; 38-a sixth branch line;
41-a first valve; 42-a second valve; 43-third valve; 44-fourth valve; 45-fifth valve; 46-sixth valve; 47-seventh valve; 48-eighth valve; 49-ninth valve;
50-light petrol etherification pipeline; 51-tenth valve;
60-catalytic diesel line;
70-a raw material tank.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the utility model provides a gasoline component recycling system in a catalytic cracking gasoline hydrogenation device, which comprises a light gasoline fractionating tower 10, a first reflux tank 11, a first reflux pump 12, a prefractionator 20, a second reflux tank 21, a second reflux pump 22, a heavy gasoline pipeline 23 and a light gasoline pipeline 13; the input end of the light gasoline fractionating tower 10 is connected with a catalytic cracking gasoline hydrogenation device, the top of the light gasoline fractionating tower 10 is connected with a first reflux tank 11, the output end of the first reflux tank 11 is connected with a first reflux pump 12, and the output end of the first reflux pump 12 is connected with the light gasoline fractionating tower 10; the light gasoline fractionating tower 10, the first reflux tank 11 and the first reflux pump 12 realize reflux refining of the light gasoline component in the light gasoline fractionating tower 10; the input end of the prefractionator 20 is connected with the bottom of the light gasoline fractionating tower 10, the top of the prefractionator 20 is connected with a second reflux tank 21, the output end of the second reflux tank 21 is connected with a second reflux pump 22, and the output end of the second reflux pump 22 is connected with the prefractionator 20; the prefractionator 20 prefractionates the components at the bottom of the light gasoline fractionating column 10 to obtain heavy gasoline components; the prefractionator 20, the second reflux drum 21 and the second reflux pump 22 realize reflux refining of light components in the prefractionator 20; one end of a heavy gasoline pipeline 23 is connected with the bottom of the prefractionator 20, a delivery pump 24 is arranged on the heavy gasoline pipeline 23, a first branch pipeline 31 and a second branch pipeline are arranged at the other end of the heavy gasoline pipeline 23, the other end of the first branch pipeline 31 is connected with a feed pipe of a heavy gasoline selective hydrodesulfurization reaction system, and the other end of the second branch pipeline is connected with a raw material buffer tank 70 of a diesel hydro-upgrading device; two branches are arranged on the heavy gasoline pipeline 23, heavy gasoline is conveyed into a system of the diesel hydro-upgrading device through a second branch pipeline, so that the recycling of heavy gasoline components in the diesel hydro-upgrading device is realized, naphtha produced by the diesel hydro-upgrading device is used as a raw material of the reforming device, the yield of reformed chemical products is increased, the defect of unbalanced materials and energy of the whole plant caused by low-load operation of the whole plant is overcome, and the comprehensive economic benefit is improved; the input end of the light gasoline pipeline 13 is arranged between the light gasoline fractionating tower 10 and the first reflux pump 12, the other end of the light gasoline pipeline 13 is provided with a third branch pipeline 36 and a fourth branch pipeline, the third branch pipeline 36 is used for delivering light gasoline, the other end of the fourth branch pipeline is provided with a fifth branch pipeline 37 and a sixth branch pipeline 38, the other end of the fifth branch pipeline 37 is connected with a light gasoline etherification pipeline 50, and the other end of the sixth branch pipeline 38 is connected with a light gasoline sweetening pipeline; three branches are arranged on the light gasoline pipeline 13, one part of the light gasoline is used for sending, the other part of the light gasoline enters a light gasoline etherification system for etherification, and the other part of the light gasoline enters a light gasoline sweetening pipeline for sweetening treatment, so that the full utilization of the light gasoline components is realized. The gasoline component recycling system has reasonable layout, ingenious design, convenient control, safety and reliability.
Referring to fig. 1, as a preferred embodiment, the second branch line includes a connecting line 32, a common line 33, a bypass line 34, and a connecting line 35 in this order, and the fifth branch line 37 is connected to the light gasoline etherification line 50 through the common line 33; the fifth branch line 37 and the second branch line share the common line 33, which sufficiently improves the utilization ratio of the common line 33, and when heavy gasoline is not recycled, light gasoline enters the light gasoline etherification line 50 from the fifth branch line 37 and the common line 33 for etherification. Preferably, the first branch pipe 31 is provided with a first valve 41, the connecting pipe 32 is provided with a second valve 42 and a third valve 43 in sequence, the bypass pipe 34 is provided with a fourth valve 44, and the connecting pipe 35 is provided with a fifth valve 45; the light gasoline pipeline 13 is provided with a sixth valve 46, the third branch pipeline 36 is provided with a seventh valve 47, the fifth branch pipeline 37 is provided with an eighth valve 48, the sixth branch pipeline 38 is provided with a ninth valve 49, and the light gasoline etherification pipeline 50 is provided with a tenth valve 51. The first valve 41 controls the connection and disconnection of the first branch line 31 and the feed pipe of the heavy gasoline selective hydrodesulfurization reaction system, thereby controlling whether the heavy gasoline enters the heavy gasoline selective hydrodesulfurization reaction system; the connection line 32 is provided with double valves, namely a second valve 42 and a third valve 43, which improves the accuracy of control and reduces the risk of leakage inside the valve. Further, the transfer pump 24 is connected to a controller, and the first valve 41, the second valve 42, the third valve 43, the fourth valve 44, the fifth valve 45, the sixth valve 46, the seventh valve 47, the eighth valve 48, the ninth valve 49 and the tenth valve 51 are all solenoid valves, and the first valve 41, the second valve 42, the third valve 43, the fourth valve 44, the fifth valve 45, the sixth valve 46, the seventh valve 47, the eighth valve 48, the ninth valve 49 and the tenth valve 51 are all connected to the controller. The controller can uniformly control the delivery pump 24, the first valve 41, the second valve 42, the third valve 43, the fourth valve 44, the fifth valve 45, the sixth valve 46, the seventh valve 47, the eighth valve 48, the ninth valve 49 and the tenth valve 51, so that the control is convenient and the operation is convenient. Specifically, the first valve 41, the fifth valve 45 and the sixth valve 46 are all automatic regulating control valves, and the automatic regulating control valves can automatically regulate flow and are easy to operate. The fifth valve 45 is a medium-pressure valve, and the pressure level of the fifth valve 45 is PN4.0, so that the risk of leakage is reduced, and the operation safety and reliability of the whole system are ensured.
Referring to fig. 1, as a preferred embodiment, the transfer pump 24 is a variable frequency pump, which uses variable frequency control to achieve automatic rotational speed adjustment with low power consumption. In addition, the second branch line is preferably a seamless steel pipe, which reduces investment and saves costs. Further, the second branch pipeline is made of No. 20 steel, and the No. 20 steel is safe and reliable. Secondly, preferably, the junction of the bypass pipeline 34 and the connecting pipeline 35 is also connected with the catalytic diesel pipeline 60 at the output end of the catalytic cracking device, the connecting pipeline 35 is also the pipeline of the catalytic diesel pipeline 60 at the output end of the original catalytic cracking device, which enters the raw material tank 70 of the diesel hydro-upgrading device, the design fully utilizes the pipeline available in the original essential original flow, and meanwhile, the necessary conveying pipeline and valve are added, so that the purpose that heavy gasoline is directly sent to the diesel hydro-upgrading device to recycle and produce naphtha is realized, raw materials are provided for the downstream device, and the comprehensive economic benefit of oil refining chemical products is effectively improved.
Therefore, compared with the prior art, the utility model has the beneficial effects that: according to the utility model, two branches are arranged on the heavy gasoline pipeline 23, heavy gasoline is conveyed into a system of the diesel hydro-upgrading device through the second branch pipeline, so that the recycling of heavy gasoline components in the diesel hydro-upgrading device is realized, naphtha produced by the diesel hydro-upgrading device is used as a raw material of the reforming device, the yield of reformed chemical products is increased, the defect of unbalanced materials and energy of the whole plant caused by low-load operation of the whole plant is overcome, and the comprehensive economic benefit is improved; meanwhile, three branches are arranged on the light gasoline pipeline 13, one part of light gasoline is used for sending, the other part of light gasoline enters a light gasoline etherification system for etherification, and the other part of light gasoline enters a light gasoline sweetening pipeline for sweetening treatment, so that the full utilization of light gasoline components is realized; the gasoline component recycling system has reasonable layout, ingenious design, convenient control, safety and reliability.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A gasoline component recycling system in a catalytic cracking gasoline hydrogenation device is characterized in that: the device comprises a light gasoline fractionating tower, a first reflux tank, a first reflux pump, a prefractionator, a second reflux tank, a second reflux pump, a heavy gasoline pipeline and a light gasoline pipeline;
the light gasoline fractionating tower is characterized in that the input end of the light gasoline fractionating tower is connected with a catalytic cracking gasoline hydrogenation device, the top of the light gasoline fractionating tower is connected with the first reflux tank, the output end of the first reflux tank is connected with the first reflux pump, and the output end of the first reflux pump is connected with the light gasoline fractionating tower;
the input end of the prefractionator is connected with the bottom of the light gasoline fractionating tower, the top of the prefractionator is connected with the second reflux tank, the output end of the second reflux tank is connected with the second reflux pump, and the output end of the second reflux pump is connected with the prefractionator;
one end of the heavy gasoline pipeline is connected with the bottom of the prefractionator, a delivery pump is arranged on the heavy gasoline pipeline, a first branch pipeline and a second branch pipeline are arranged at the other end of the heavy gasoline pipeline, the other end of the first branch pipeline is connected with a feed pipe of a heavy gasoline selective hydrodesulfurization reaction system, and the other end of the second branch pipeline is connected with a raw material buffer tank of a diesel hydro-upgrading device;
the input end of the light gasoline pipeline is arranged between the light gasoline fractionating tower and the first reflux pump, a third branch pipeline and a fourth branch pipeline are arranged at the other end of the light gasoline pipeline, the third branch pipeline is used for sending light gasoline outwards, a fifth branch pipeline and a sixth branch pipeline are arranged at the other end of the fourth branch pipeline, a light gasoline etherification pipeline is connected to the other end of the fifth branch pipeline, and a light gasoline sweetening pipeline is connected to the other end of the sixth branch pipeline.
2. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation apparatus according to claim 1, characterized in that:
the second branch pipeline sequentially comprises a connecting pipeline, a shared pipeline, a bypass pipeline and a connecting pipeline, and the fifth branch pipeline is connected with the light gasoline etherification pipeline through the shared pipeline.
3. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation apparatus according to claim 2, characterized in that:
and the joint of the bypass pipeline and the connecting pipeline is also connected with a catalytic diesel pipeline at the output end of the catalytic cracking device.
4. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation apparatus according to claim 2, characterized in that:
the first branch pipe is provided with a first valve, the connecting pipeline is provided with a second valve and a third valve in sequence, the bypass pipeline is provided with a fourth valve, and the bypass pipeline is provided with a fifth valve;
the light gasoline etherification pipeline is provided with a tenth valve.
5. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation unit according to claim 4, wherein:
the delivery pump is connected with a controller, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve are all solenoid valves, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve are all connected with the controller.
6. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation unit according to claim 5, wherein:
the first valve, the fifth valve and the sixth valve are all automatic adjusting control valves.
7. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation apparatus according to any one of claims 1 to 6, characterized in that:
the conveying pump is a variable frequency pump.
8. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation unit according to claim 6, characterized in that:
the fifth valve is a medium-pressure valve, and the pressure level of the fifth valve is PN4.0.
9. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation apparatus according to claim 1, characterized in that:
the second branch pipeline is a seamless steel pipe.
10. The gasoline component recycling system in a catalytic cracking gasoline hydrogenation apparatus according to claim 9, characterized in that:
the second branch pipeline is made of No. 20 steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320274142.1U CN219526551U (en) | 2023-02-22 | 2023-02-22 | Gasoline component recycling system in catalytic cracking gasoline hydrogenation device |
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| CN202320274142.1U CN219526551U (en) | 2023-02-22 | 2023-02-22 | Gasoline component recycling system in catalytic cracking gasoline hydrogenation device |
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| CN219526551U true CN219526551U (en) | 2023-08-15 |
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