Device for removing bromine index of desorption agent redistillation tower bottom material
By modifying the desorbent redistillation column bottom material flow process and utilizing a water cooler and clay processor, the problem of high bromine index in the desorbent redistillation column bottom material was solved, enabling the recovery and reuse of the desorbent and reducing losses.
Patent Information
- Application Number
- CN202423249840.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The high bromine index in the bottom product of the desorbent re-distillation tower in aromatics plants prevents the desorbent from being recovered and reused, resulting in losses.
By modifying the process of collecting the bottom material from the desorbent redistillation tower, introducing a water cooler and a clay processor, and combining the operation of control valves and pumps, material recycling is achieved, reducing the bromine index and recovering the desorbent.
It effectively removes the bromine index from the bottom material of the desorbent re-distillation column, enabling the recovery and reuse of the desorbent and reducing losses.
Smart Images
Figure CN223774340U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a device for removing the bromine index of the bottom material of a desorbent redistillation tower, which is suitable for adsorption devices in aromatic hydrocarbon plants and belongs to the chemical industry. Background Technology
[0002] The purpose of the desorbent redistillation column in an aromatics plant is to remove C10+ components from the desorbent. Because the C10+ component is relatively small in the system, over 70% of the material at the bottom of the redistillation column is the desorbent. The material at the bottom of the redistillation column is discharged weekly; over time, the accumulated bromine index in the material becomes very high, making it unrecoverable and resulting in desorbent loss. Utility Model Content
[0003] In view of the technical problem of desorbent loss due to the high cumulative bromine index of the bottom material of the desorbent redistillation column, which cannot be recovered and reused over a long period of time, the purpose of this utility model is to provide a device for removing the bromine index of the bottom material of the desorbent redistillation column, thereby modifying the bottom product process of the redistillation column and solving the technical problem of desorbent loss due to the high bromine index in the bottom material of the desorbent redistillation column.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a device for removing the bromine index of the bottom material of a desorbent redistillation tower, comprising: a desorbent redistillation tower, a desorbent redistillation tower outflow line, a clay processor, a water cooler, and a cross-line process; the front end of the water cooler is connected to a first pipeline; the desorbent redistillation tower outflow line includes a bottom outflow line; the cross-line process is led out from the bottom outflow line and connected to the first pipeline in front of the water cooler; the clay processor is located above the water cooler and connected to the clay processor via a pipeline; the bottom of the clay processor is connected to the feed pipeline of the desorbent redistillation tower via its discharge pipeline; and the top of the desorbent redistillation tower is connected to the evaporator tower via a pipeline.
[0005] The first pipeline originates from the heptane removal column feed / bottom heat exchanger E704;
[0006] Furthermore, the top of the clay processor is equipped with a feed pipeline from the tank area, and a heat exchanger E615 is installed on the feed pipeline. A first regulating valve is installed at the front end of the heat exchanger, and a temperature gauge is installed at the rear end of the heat exchanger.
[0007] Furthermore, the rear end of the water cooler is connected to the inlet pipe at the top and the outlet pipe at the bottom of the clay processor via branch lines; control valves are respectively installed on the branch lines connecting the inlet pipe and the outlet pipe of the clay processor, namely the first control valve and the second control valve in sequence.
[0008] Furthermore, the feed line of the desorbent re-distillation tower is connected to the C602 evaporator / C604 raffinate tower and a second regulating valve is installed on the line.
[0009] Furthermore, the bottom of the desorbent redistillation column is connected to the tank area via a collection pump and a collection valve; the collection valve is located behind the collection pump.
[0010] Furthermore, the cross-line process includes: a cross-line, a third control valve, a fourth control valve, and a fifth control valve; the third control valve is located on the bottom outlet line of the desorbent redistillation column and is located downstream of the outlet valve; the fourth control valve is located on the first pipeline from E704; the cross-line is connected from the outlet valve of the bottom outlet line of the desorbent redistillation column and the third control valve to the rear end of the fourth control valve of the first pipeline via a tee; the cross-line is equipped with a fifth control valve;
[0011] Furthermore, the third, fourth, and fifth control valves are all gate valves, and the third and fourth control valves have the same specifications; the fifth control valve has a larger specification than the third and fourth control valves.
[0012] Furthermore, the cross-line uses a DN40 pipeline;
[0013] Furthermore, a reboiler for the desorbent redistillation tower is also installed on one side of the bottom of the desorbent redistillation tower via a pipeline.
[0014] The operating procedure of the device using the above structure is as follows:
[0015] External operator closes the second, third, and fourth control valves; internal operator closes the first regulating valve on the bleaching clay processor feed line.
[0016] The operator opens the first control valve on the branch pipeline at the rear end of the water cooler and the fifth control valve across the pipeline to confirm that the flow is unobstructed;
[0017] The internal operator will set the valve position to 5%;
[0018] The operator starts the extraction pump and slowly opens the pump outlet valve.
[0019] The internal control adjusts the flow rate through the outlet valve. The material from the desorbent redistillation tower flows from the outlet pump to the outlet valve, then through a cross-line to the first pipeline, reaching the water cooler. The material is cooled to 100°C by the water cooler and enters the clay processor for processing through a branch line connected to the first control valve. After processing by the clay processor, the material enters the feed line of the desorbent redistillation tower through the discharge line at its bottom, thus forming a cycle. This cycle achieves the purpose of removing the bromine index from the desorbent, and the desorbent is recovered to the evaporator.
[0020] The beneficial effects of this utility model's device for removing the bromine index of the bottom material from a desorbent redistillation column are:
[0021] The material collected from the desorbent redistillation tower of this device is cooled by water and then enters the processing flow of the clay processor; after being processed by the desorbent redistillation tower, the desorbent is recovered by the downstream raffinate tower, thereby achieving the removal of the bromine index of the material at the bottom of the desorbent redistillation tower. Attached Figure Description
[0022] Figure 1 This is a structural diagram of the present invention.
[0023] In the diagram, 1. Desorbent redistillation tower, 2. Bleaching clay processor, 3. Water cooler, 4. First pipeline, 5. Bottom of tower outflow line, 6. Feed pipeline of desorbent redistillation tower, 7. Feed pipeline from tank farm, 8. Heat exchanger E615, 9. First regulating valve, 10. Branch pipeline, 11. First control valve, 12. Second control valve, 13. Second regulating valve, 14. Outflow pump, 15. Outflow valve, 16. Crossover line, 17. Third control valve, 18. Fourth control valve, 19. Fifth control valve. Detailed Implementation
[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0025] like Figure 1 The apparatus shown is for removing the bromine index of the bottom material of a desorbent redistillation tower, comprising: a desorbent redistillation tower 1, a desorbent redistillation tower outflow line, a clay processor 2, a water cooler 3, and a cross-line flow; the front end of the water cooler 3 is connected to a first pipeline 4 from E704; the desorbent redistillation tower outflow line includes a bottom outflow line 5; the cross-line flow is led out from the bottom outflow line 5 and connected to the first pipeline 4 before the water cooler 3; located above the water cooler 3, it is connected to the clay processor 2 via a pipeline; the bottom of the clay processor 2 is connected to the feed pipeline 6 of the desorbent redistillation tower via its discharge pipeline; and the top of the desorbent redistillation tower 1 is connected to the evaporator tower via a pipeline.
[0026] Furthermore, the top of the clay processor 2 is provided with a feed pipeline 7 from the tank area, a heat exchanger 8 is provided on the feed pipeline 7, a first regulating valve 9 is provided at the front end of the heat exchanger 8, and a temperature gauge is installed at the rear end of the heat exchanger 8.
[0027] Furthermore, the rear end of the water cooler 3 is connected to the feed line at the top and the discharge line at the bottom of the clay processor via two branch lines 10 respectively; control valves are respectively installed on the branch lines connecting the feed line and the discharge line of the clay processor, namely the first control valve 11 and the second control valve 12.
[0028] Furthermore, the feed line 7 of the desorbent re-distillation tower is connected to the C602 evaporator / C604 raffinate tower, and a second regulating valve 12 is provided on the line.
[0029] Furthermore, the bottom outlet line 5 of the desorbent redistillation column 1 is connected to the tank area via an outlet pump 14 and an outlet valve 15; the outlet valve 15 is located behind the outlet pump 14.
[0030] Furthermore, the cross-line process includes: cross-line 16, third control valve 17, fourth control valve 18, and fifth control valve 19; the third control valve 17 is located on the bottom outlet line 5 of the desorbent redistillation column 1 and is located after the outlet valve 15; the fourth control valve 18 is located on the first pipeline 4 from E704; the cross-line 16 is connected from the outlet valve 15 and the third control valve 17 of the bottom outlet line 5 of the desorbent redistillation column 1 to the rear end of the fourth control valve 18 of the first pipeline 4 via a tee; the fifth control valve 19 is provided on the cross-line 16;
[0031] Furthermore, the third control valve 17, the fourth control valve 18, and the fifth control valve 19 are all gate valves, and the third control valve 17 and the fourth control valve 18 have the same specifications; the fifth control valve 19 has a larger specification than the third control valve 17 and the fourth control valve 18.
[0032] Furthermore, the cross-line 16 uses a DN40 pipeline;
[0033] The operating procedure of the device with the above structure is as follows:
[0034] External operator closes the second control valve 12, the third control valve 17 and the fourth control valve 18; internal operator closes the first regulating valve 9 on the feed pipeline of the clay processor 2.
[0035] The operator opens the first control valve 11 on the rear branch pipeline 10 of the water cooler 3 and the fifth control valve 19 on the cross line 16 to confirm that the flow is unobstructed.
[0036] The internal operator will set the valve position of valve 15 to 5%;
[0037] The operator starts the extraction pump 14 and slowly opens the pump outlet valve;
[0038] The internal control valve 15 is used to adjust the flow rate. The material from the desorbent redistillation tower 1 flows from the outlet of the pump 14 to the valve 15, and then through the cross line 16 to the first pipeline 4, reaching the water cooler 3. The material is cooled to 100°C by the water cooler 3 and enters the clay processor 2 for processing through the branch pipeline 10 connected to the first control valve 11. After being processed by the clay processor 2, it enters the feed pipeline 7 of the desorbent redistillation tower through the discharge pipeline at its bottom, and then enters the desorbent redistillation tower 1, thus forming a cycle. This cycle achieves the purpose of removing the bromine index from the desorbent, and the desorbent is recovered to the evaporator.
[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
Claims
1. An apparatus for removing bromine index from a desorbent rerun column bottoms material, characterized by, It comprises: a desorbent redistillation column, a desorbent redistillation column effluent line, a clay treater, a water cooler and a cross line; the water cooler is connected to a first pipeline at its front end; the desorbent redistillation column effluent line comprises a column bottom effluent line; the cross line is drawn from the column bottom effluent line and connected to the first pipeline in front of the water cooler; a pipeline is connected to the clay treater above the water cooler, and the bottom of the clay treater is connected to the desorbent redistillation column through its discharge pipeline; the top of the desorbent redistillation column is connected to the raffinate column through a pipeline.
2. The apparatus for removing bromine index from redistilled column bottoms of a desorbent according to claim 1, characterized in that: The top of the clay treater is provided with a feed pipeline from the tank farm, and a heat exchanger is arranged on the feed pipeline; a first regulating valve is arranged at the front end of the heat exchanger, and a temperature gauge is arranged at the rear end of the heat exchanger.
3. The apparatus of claim 1 wherein: The rear end of the water cooler is connected to the feed pipeline and the discharge pipeline at the top and bottom of the clay treater through two branch pipelines respectively; a control valve is arranged on each of the branch pipeline connected to the feed pipeline and the discharge pipeline of the clay treater, and the control valves are sequentially a first control valve and a second control valve.
4. The apparatus of claim 1 wherein: The feed pipeline of the desorbent redistillation column is connected to the C602 extract column / C604 raffinate column, and a second regulating valve is arranged on the pipeline.
5. The apparatus of claim 1 wherein: The column bottom effluent line of the desorbent redistillation column is connected to the tank farm through a discharge pump and a discharge valve; the discharge valve is located at a position behind the discharge pump.
6. The apparatus of claim 1 wherein: The cross line comprises a cross line, a third control valve, a fourth control valve and a fifth control valve; the third control valve is located on the column bottom effluent line of the desorbent redistillation column and behind the discharge valve; the fourth control valve is located on the first pipeline from E704; the cross line is connected to the rear end of the fourth control valve of the first pipeline through a tee joint at a position between the discharge valve and the third control valve of the column bottom effluent line of the desorbent redistillation column; and the fifth control valve is arranged on the cross line.
7. The apparatus of claim 6 wherein: The third control valve, the fourth control valve and the fifth control valve are all gate valves, and the third control valve and the fourth control valve have the same specifications; the fifth control valve has a larger specification than the third control valve and the fourth control valve.
8. The apparatus of claim 6 wherein: The cross line adopts a DN40 pipeline.