Reformed C9 recycling device
By separating and treating the reformed carbon nine and the rich absorption oil in a distillation tower and other devices, the problem of poor performance of reformed carbon nine in the catalytic cracking unit was solved, and efficient utilization and stable gasoline production were achieved.
Patent Information
- Application Number
- CN202422912846.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Reformed C9 is less effective as a terminator in catalytic cracking units, and when it is directly blended with stabilized gasoline and fed into the hydrogenation unit, it affects the life of the catalyst, leading to irreversible losses.
The reformed carbon nine and the rich absorption oil are separated together in a distillation tower, and processed through devices such as a distillation tower, an oil-gas separator, an absorption tower and a desorption tower to achieve the recycling and utilization of the reformed carbon nine, thereby preventing it from entering the catalytic riser reactor or being directly blended.
It effectively removes the colloid in the reformed carbon nine, avoids adverse effects, improves the utilization rate of the reformed carbon nine, and stably produces gasoline for delivery.
Smart Images
Figure CN223422628U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of reforming carbon nine devices, and in particular relates to a reforming carbon nine recycling device. Background Art
[0002] Reformed carbon nine mainly comes from the heavy aromatics produced by the reforming unit in the aromatics complex. After separating carbon ten and above aromatics, the material with carbon nine as the main component includes isopropylbenzene, n-propylbenzene, ethyltoluene, mesitylene, unimaginative trimethylol, o-trimethylol, etc.
[0003] Reformed carbon nine has a high octane number, and its octane number (RON) can reach above 100, and can be used to blend high-octane gasoline. The current common method is to introduce it into the riser reactor of the catalytic cracking unit as a terminator or directly blend it with stable gasoline and then enter the hydrogenation unit for refining.
[0004] Since the composition of reformed carbon nine is mainly aromatic components, the riser reactor of the catalytic cracking unit cannot produce cracking reaction on the aromatic components, and the effect of reformed carbon nine as a terminator is poor; the gum content of reformed carbon nine is high, and directly blending it with stabilized gasoline and entering the hydrogenation unit for refining will also affect the life of the hydrogenation unit catalyst and cause irreversible losses.
[0005] Therefore, it is of great significance to explore a more reasonable reforming carbon nine recycling device and improve the utilization rate of reforming carbon nine. Utility Model Content
[0006] In order to solve the above-mentioned defects of the existing technology, the utility model provides a reformed carbon nine recycling device, which allows the reformed carbon nine and the rich absorption oil to enter the distillation tower for separation, thereby realizing the recycling and utilization of the reformed carbon nine, avoiding the adverse effects caused by the reformed carbon nine entering the catalytic riser reactor or direct blending, and can form a stable gasoline delivery.
[0007] The utility model discloses a reforming carbon nine recycling device, comprising a reforming carbon nine pipeline, the reforming carbon nine pipeline being connected to a distillation tower, the reforming carbon nine pipeline being provided with a flow meter, the distillation tower being connected to an air compressor via an oil and gas pipeline, the air compressor being connected to a rich gas air cooling, the rich gas air cooling being connected to a rich gas water cooling, the rich gas water cooling being connected to an oil and gas separator, the oil and gas separator being connected to an absorption tower, the top of the absorption tower being connected to a reabsorption tower via a pipeline, the bottom of the reabsorption tower being provided with a rich absorption oil pipeline connected to the distillation tower, the oil and gas separator being connected to the analysis tower via a analysis tower feed pump, and the analysis tower being connected to the top of a stabilization tower via three pipelines.
[0008] Preferably, the distillation tower is provided with a liquid level gauge and a reboiler is provided at the bottom of the tower.
[0009] Preferably, the pipeline connecting the feed pump of the analytical tower to the analytical tower enters the analytical tower from the top and the middle of the tower respectively. The top of the tower is provided with a feed ball valve, and the middle of the tower is provided with a feed ball valve and a heat exchanger.
[0010] Preferably, the top of the analysis tower is connected to the rich gas air cooling, the top of the stabilization tower is provided with a liquefied gas delivery pipeline, and the bottom of the stabilization tower is provided with a gasoline product delivery pipeline.
[0011] Preferably, six heat exchangers are provided on the gasoline product delivery pipeline.
[0012] Preferably, the bottom of the absorption tower is connected to the rich gas water cooling via an absorption tower discharge pump.
[0013] Preferably, the top of the reabsorption tower is provided with a dry gas pipeline, and the tower body is provided with a lean absorption oil pipeline.
[0014] Specifically, in the reformed carbon nine recycling device described in the present invention, the reformed carbon nine and the rich absorption oil enter the upper part of the distillation tower through the reformed carbon nine pipeline and the rich absorption oil pipeline respectively. A liquid level meter and a reboiler are set in the distillation tower to ensure the efficiency of distillation. After distillation, the oil and gas are distilled out from the top of the distillation tower, and after heat exchange with the heat medium water, they enter the rich gas air cooling device and the rich gas water cooling device to be cooled to 40°C, and then enter the oil and gas separator for separation; the gas separated by the oil and gas separator enters the absorption tower for absorption, and the lean gas after absorption is sent to the reabsorption tower, and the reabsorption tower is provided with a lean absorption oil pipeline, and the lean absorption oil is used as an absorbent for further absorption. The dry gas is transported to the next device through the dry gas pipeline at the top of the reabsorption tower, and rich absorption oil is generated at the bottom of the reabsorption tower. The absorption oil is transported to the distillation tower through a pipeline for recycling, and the heavy components separated by the absorption tower are circulated to the rich gas water cooling device through the absorption tower discharge pump to continue to be recycled; the oil in the oil-gas separator is extracted by the analysis tower feed pump and divided into two paths: one path is heated through the feed ball valve and heat exchanger to enter the tenth layer of the analysis tower, and the other path is directly entered into the top of the analysis tower through the feed ball valve, and the heat source is provided by the bottom of the analysis tower to desorb the ≤C2 components in the condensed oil; light aromatics are extracted from the bottom of the analysis tower and transported to different layers of the stabilization tower through 3 pipelines for multi-component fractionation, liquefied gas is distilled from the top of the stabilization tower, and transported to the next device through the liquefied gas delivery pipeline. The stabilized gasoline is extracted from the bottom of the stabilization tower, heat exchanged 6 times, cooled to 40℃, and delivered through the gasoline product delivery pipeline.
[0015] Compared with the existing technology, the utility model has the following beneficial effects: by separating and absorbing the reformed carbon nine and the rich absorption oil, and recycling the reformed carbon nine, the colloid in the reformed carbon nine is effectively removed, and the adverse effects caused by the reformed carbon nine entering the catalytic riser reactor or being directly blended are avoided. Combined with the use of flow meters and liquid level meters for comprehensive control, the overall device is simple to operate and can stably produce gasoline for delivery. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic structural diagram of the reforming carbon nine recycling device in the present utility model.
[0017] In the figure: 1. Reforming carbon nine pipeline; 2. Flow meter; 3. Rich absorption oil pipeline; 4. Distillation tower; 5. Liquid level meter; 6. Oil and gas pipeline; 7. Air compressor; 8. Rich gas air cooling; 9. Rich gas water cooling; 10. Oil and gas separator; 11. Desorption tower feed pump; 12. Absorption tower discharge pump; 13. Absorption tower; 14. Reabsorption tower; 15. Dry gas pipeline; 16. Lean absorption oil pipeline; 17. Desorption tower; 18. Feed ball valve; 19. Heat exchanger; 20. Stabilization tower; 21. Liquefied gas delivery pipeline; 22. Gasoline product delivery pipeline; 401. Reboiler. DETAILED DESCRIPTION
[0018] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0019] like Figure 1 As shown, the reforming carbon nine recycling device described in the utility model includes a reforming carbon nine pipeline 1, the reforming carbon nine pipeline 1 is connected to the distillation tower 4, the top of the distillation tower 4 is connected to the air compressor 7 through the oil and gas pipeline 6, the air compressor 7 is connected to the rich gas air cooling 8, the rich gas air cooling 8 is connected to the rich gas water cooling 9, the rich gas water cooling 9 is connected to the oil and gas separator 10, the oil and gas separator 10 is connected to the absorption tower 13, the top of the absorption tower 13 is connected to the reabsorption tower 14 through a pipeline, the bottom of the reabsorption tower 14 is provided with a rich absorption oil pipeline 3 connected to the distillation tower 4, the oil and gas separator 10 is connected to the analysis tower 17 through the analysis tower feed pump 11, and the analysis tower 17 is connected to the stabilization tower 20.
[0020] The reforming carbon nine pipeline 1 is provided with a flow meter 2 .
[0021] The fractionating tower 4 is provided with a liquid level gauge 5 and the bottom of the tower is provided with a reboiler 401 .
[0022] The pipeline connecting the analytical tower feed pump 11 and the analytical tower 17 enters the analytical tower 17 in two ways, one way is provided with a feed ball valve 18, and the other way is provided with a feed ball valve 18 and a heat exchanger 19.
[0023] The top of the analysis tower 17 is connected to the rich gas air cooling 8, the top of the stabilization tower 20 is provided with a liquefied gas delivery pipeline 21, and the bottom of the stabilization tower 20 is provided with a gasoline product delivery pipeline 22.
[0024] Six heat exchangers 19 are provided on the gasoline product delivery pipeline 22 .
[0025] The bottom of the absorption tower 13 is connected to the rich gas water cooling 9 through the absorption tower discharge pump 12.
[0026] The top of the reabsorption tower 14 is provided with a dry gas pipeline 15 , and the tower body is provided with a lean absorption oil pipeline 16 .
[0027] Specifically, in the reformed carbon nine recycling device described in the present invention, the reformed carbon nine and the rich absorption oil enter the upper part of the distillation tower 4 through the reformed carbon nine pipeline 1 and the rich absorption oil pipeline 3 respectively. The distillation tower 4 is provided with a liquid level meter 5 and a reboiler 401 to ensure the efficiency of distillation. After distillation, the oil and gas are distilled out from the top of the distillation tower 4, and after heat exchange with the heat medium water, they enter the rich gas air cooling 8 device and the rich gas water cooling 9 device to be cooled to 40°C, and then enter the oil and gas separator 10 for separation; the gas separated by the oil and gas separator 10 enters the absorption tower 13 for absorption, and the lean gas after absorption is sent to the reabsorption tower 14, and the reabsorption tower 14 is provided with a lean absorption oil pipeline 16, and the lean absorption oil is used as an absorbent for further absorption. The dry gas is transported to the next device through the dry gas pipeline 15 at the top of the reabsorption tower 14, and rich absorption oil is generated at the bottom of the reabsorption tower 14. The rich absorption oil pipeline 3 is transported to the distillation tower 4 for recycling, and the heavy components separated by the absorption tower 13 are circulated to the rich gas water cooling device 9 through the absorption tower discharge pump 12 for continued recycling; the oil in the oil-gas separator 10 is extracted by the desorption tower feed pump 11 and divided into two paths: one path passes through the feed ball valve 18 and the heat exchanger 19 to enter the tenth layer of the desorption tower 17 for heating, and the other path passes through the feed ball valve 18 directly into the top of the desorption tower 17, and the heat source is provided by the bottom of the desorption tower 17 to desorb the ≤C2 components in the condensed oil; light aromatics are extracted from the bottom of the desorption tower 17 and transported to the stabilization tower 20 for multi-component fractionation, and the liquefied gas is distilled from the top of the stabilization tower 20 and transported to the next device through the liquefied gas delivery pipeline 21. The stabilized gasoline is extracted from the bottom of the stabilization tower 20, heat exchanged 6 times, cooled to 40°C, and delivered through the gasoline product delivery pipeline 22.
Claims
1. A reforming carbon nine recycling device, characterized in that: The invention comprises a reforming carbon nine pipeline (1), wherein the reforming carbon nine pipeline (1) is connected to a fractionating tower (4), the top of the fractionating tower (4) is connected to an air compressor (7) via an oil and gas pipeline (6), the air compressor (7) is connected to a rich gas air cooling (8), the rich gas air cooling (8) is connected to a rich gas water cooling (9), the rich gas water cooling (9) is connected to an oil and gas separator (10), the oil and gas separator (10) is connected to an absorption tower (13), the top of the absorption tower (13) is connected to a reabsorption tower (14) via a pipeline, the bottom of the reabsorption tower (14) is provided with a rich absorption oil pipeline (3) connected to the fractionating tower (4), the oil and gas separator (10) is connected to a desorption tower (17) via a desorption tower feed pump (11), and the desorption tower (17) is connected to a stabilization tower (20).
2. The reforming carbon nine recycling device according to claim 1, characterized in that: The reforming carbon nine pipeline (1) is provided with a flow meter (2).
3. The reforming carbon nine recycling device according to claim 1, characterized in that: The fractionation tower (4) is provided with a liquid level gauge (5), and a reboiler (401) is provided at the bottom of the tower.
4. The reforming carbon nine recycling device according to claim 1, characterized in that: The desorption tower feed pump (11) is connected to the desorption tower (17) through two pipelines at the top and in the tower. A feed ball valve (18) is provided on the pipeline for feeding the desorption tower (17) at the top, and a feed ball valve (18) and a heat exchanger (19) are provided on the pipeline for feeding the desorption tower (17) in the tower.
5. The reforming carbon nine recycling device according to claim 1, characterized in that: The top of the analysis tower (17) is connected to the rich gas air cooling (8), the top of the stabilization tower (20) is provided with a liquefied gas delivery pipeline (21), and the bottom of the stabilization tower (20) is provided with a gasoline product delivery pipeline (22).
6. The reforming carbon nine recycling device according to claim 5, characterized in that: Six heat exchangers (19) are provided on the gasoline product delivery pipeline (22).
7. The reforming carbon nine recycling device according to claim 1, characterized in that: The bottom of the absorption tower (13) is connected to the rich gas water cooling (9) through the absorption tower discharge pump (12).
8. The reforming carbon nine recycling device according to claim 1, characterized in that: The top of the reabsorption tower (14) is provided with a dry gas pipeline (15), and the tower body is provided with a lean absorption oil pipeline (16).