External reformate heat exchange system with bypass added for aromatic hydrocarbon combination unit
By adding a bypass external reforming oil heat exchange system to the aromatics complex, and using the air cooler at the top of the reforming oil tower to exchange heat with the externally supplied reforming oil, the problems of high energy consumption and complicated pipelines caused by the low temperature of the externally supplied reforming oil were solved, and energy consumption was reduced and pipelines were simplified.
Patent Information
- Application Number
- CN202423203241.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In aromatics complexes, the temperature of externally fed reformate is relatively low. When it needs to be heated by a heat exchanger, the pipeline layout is complicated and energy consumption is high, especially when there is a large amount of external feed.
Adding a bypass external reforming oil heat exchange system to the aromatics complex allows for heat exchange between the externally supplied reforming oil and the air cooler at the top of the reforming tower, enabling heat reuse and reducing energy consumption.
By reusing heat, energy consumption is reduced, pipeline layout is simplified, and production efficiency is improved.
Smart Images
Figure CN223774821U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the outside of the supplementary reforming oil heat exchange technical field, especially is aromatic hydrocarbon combined device increases bypass outside of the supplementary reforming oil heat exchange system. BACKGROUND
[0002] Aromatic hydrocarbon combined device production process, because the temperature of the supplementary reforming oil material is lower, needs to be fed after heat exchange of heat exchanger, if the independent heat exchange system is set for the supplementary reforming oil material to heat it, pipeline arrangement is complicated, especially when the supplementary material is more, involves higher energy consumption. CONTENT OF THE UTILITY MODEL
[0003] In view of above problem, the purpose of the present application is to provide aromatic hydrocarbon combined device increases bypass outside of the supplementary reforming oil heat exchange system, makes it heat exchange with the reforming oil tower top air cooler inlet and N7 interface area outside of the supplementary reforming oil, reuses heat, can reach the purpose of energy saving.
[0004] To achieve the above part or all purposes or other purposes, the present application provides the following technical scheme: aromatic hydrocarbon combined device increases bypass outside of the supplementary reforming oil heat exchange system, including reforming oil heat exchange pipeline and reforming oil tower;The reforming oil steam heater and dimethyl benzene deoxidation tower are sequentially connected on the reforming oil heat exchange pipeline, and the reforming oil steam heater inlet is connected with the supplementary reforming oil pipe section;The supplementary reforming oil heat exchanger is connected on the supplementary reforming oil pipe section;The supplementary reforming oil heat exchanger is connected with the reforming oil tower outlet pipeline;The outlet of the reforming oil heat exchange pipeline is connected to the reforming oil tower.
[0005] Further, the supplementary reforming oil heat exchanger is connected on the supplementary reforming oil pipe section through a first pipeline and a second pipeline;Double valves are arranged on the supplementary reforming oil pipe section, the first pipeline is connected in front of the double valves, and the second pipeline is connected behind the double valves;A first valve is arranged on the first pipeline, and a second valve is arranged on the second pipeline;The first pipeline and the second pipeline are connected with the supplementary reforming oil heat exchanger tube.
[0006] Further, the supplementary reforming oil pipe section is connected with an external reforming oil filter in front of the first pipeline inlet;A filter bypass valve is arranged on the supplementary reforming oil pipe section, the external reforming oil filter is connected on the supplementary reforming oil pipe section through a filter inlet pipeline and a filter outlet pipeline, the filter inlet pipeline is connected in front of the filter bypass valve, the filter outlet pipeline is connected behind the filter bypass valve, and the inlet and outlet of the external reforming oil filter are controlled by valves.
[0007] Further, the outer make-up reforming oil heat exchanger is connected to the reforming oil tower outlet pipeline through an outer make-up reforming oil heat exchanger inlet pipeline and an outer make-up reforming oil heat exchanger outlet pipeline, the reforming oil tower outlet pipeline is provided with a reforming oil tower overhead air cooler, the outer make-up reforming oil heat exchanger inlet pipeline is connected to a front route of the reforming oil tower overhead air cooler, the outer make-up reforming oil heat exchanger outlet pipeline is connected to a rear route of the reforming oil tower overhead air cooler, an inlet valve is arranged on the outer make-up reforming oil heat exchanger inlet pipeline, and an outlet valve is arranged on the outer make-up reforming oil heat exchanger outlet pipeline; the outer make-up reforming oil heat exchanger inlet pipeline and the outer make-up reforming oil heat exchanger outlet pipeline are connected to a shell side of the outer make-up reforming oil heat exchanger.
[0008] Further, the reforming oil tower outlet pipeline inlet is connected to a tower top outlet of the reforming oil tower, and the reforming oil tower outlet pipeline outlet is connected to a reforming oil tower reflux tank.
[0009] Further, the reforming oil heat exchange pipeline outlet is connected to a reforming oil tower heat exchanger, and after heat exchange through the reforming oil tower heat exchanger, is connected to the reforming oil tower.
[0010] Further, the xylene deoxidizing tower is provided with a xylene deoxidizing tower heat exchanger, the reforming oil heat exchange pipeline is connected to the xylene deoxidizing tower after heat exchange through the xylene deoxidizing tower heat exchanger; the xylene deoxidizing tower inlet is connected to a tube side of the xylene deoxidizing tower heat exchanger, and the xylene deoxidizing tower outlet is connected to a shell side of the xylene deoxidizing tower heat exchanger.
[0011] Further, a bypass pipeline is arranged on the reforming oil heat exchange pipeline, the bypass pipeline is connected to a second reforming oil tower, and an adjusting valve is arranged on the bypass pipeline.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the aromatics plant aromatics combined device production process, because the temperature of the outer make-up reforming oil material is relatively low, needs to be heated by a reforming oil steam heater and a xylene deoxidizing tower after heat exchange, and then is input into a reforming oil tower, especially when the outer make-up material is relatively large, energy consumption is relatively high. The reforming oil tower overhead air cooler inlet of the reforming oil tower top is heat-exchanged with the N7 boundary area outer make-up reforming oil, heat is reused, and the purpose of saving energy consumption can be achieved. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic view of the utility model;
[0014] In the figure: 1, the outer make-up reforming oil pipe section, 2, the reforming oil steam heater, 3, the xylene deoxidation tower, 4, the outer make-up reforming oil heat exchanger, 5, the cross pipeline, 6, the reforming oil tower, 7, the reforming oil tower outlet pipeline, 8, the outer make-up reforming oil heat exchanger inlet pipeline, 9, the outer make-up reforming oil heat exchanger outlet pipeline, 11, the regulating valve, 12, the inlet valve, 13, the outlet valve, 16, the reforming oil tower top air cooler, 19, the reforming oil tower heat exchanger, 20, the external reforming oil filter, 21, the filter bypass valve, 22, the xylene deoxidation tower heat exchanger, 23, the first pipeline, 24, the second pipeline, 31, the first valve, 32, the second valve, 33, the third valve, 34, the fourth valve; A, the reforming oil tower reflux tank, E, the disproportionation stabilization tower, F, the heavy aromatic tower, G, the de-pentane tower bottom heat exchanger, H, the de-heptane tower, I, the C9 storage tank, J, the mixed aromatic, K, the outer make-up reforming oil (qualified line), L, the off reforming oil line, M, C6 / C7, N, the outer make-up reforming oil (unqualified line). DETAILED DESCRIPTION
[0015] In order to make the structure and function of the utility model more clear, the technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment.
[0016] Referring to the drawings Figure 1 The aromatic hydrocarbon combined device increases a bypass outer make-up reforming oil heat exchange system, comprising a reforming oil heat exchange pipeline and a reforming oil tower; the reforming oil heat exchange pipeline is sequentially connected with a reforming oil steam heater 2 and a xylene deoxidation tower 3, and the reforming oil steam heater 2 is connected with an outer make-up reforming oil pipe section 1; the outer make-up reforming oil pipe section 1 is connected with an outer make-up reforming oil heat exchanger 4; the outer make-up reforming oil heat exchanger 4 is connected with a reforming oil tower outlet pipeline 7; and the outlet of the reforming oil heat exchange pipeline is connected to the reforming oil tower 6.
[0017] Based on the above technical scheme, after the outer make-up reforming oil enters the device, it first enters the reforming oil steam heater 2, is heat exchanged, and then enters the xylene deoxidation tower 3.
[0018] Further, the outer make-up reforming oil heat exchanger 4 is connected to the outer make-up reforming oil pipe section 1 through a first pipeline 23 and a second pipeline 24; double valves are arranged on the outer make-up reforming oil pipe section 1, the first pipeline 23 is connected in front of the double valves, and the second pipeline 24 is connected behind the double valves; a first valve 31 is arranged on the first pipeline 23, and a second valve 32 is arranged on the second pipeline 24; the first pipeline 23 and the second pipeline 24 are connected to the pipe passage of the outer make-up reforming oil heat exchanger 4; the double valves comprise a third valve 33 and a fourth valve 34 connected in series, and the third valve 33 is arranged in front of the fourth valve 34.
[0019] Further, the outer supplemental reforming oil pipe section 1 is connected with an external reforming oil filter 20 before the No. 1 pipeline 23, the outer supplemental reforming oil pipe section 1 is provided with a filter bypass valve 21, the external reforming oil filter 20 is connected with the outer supplemental reforming oil pipe section 1 through a filter inlet pipeline and a filter outlet pipeline, the filter inlet pipeline is connected before the filter bypass valve 21, the filter outlet pipeline is connected after the filter bypass valve 21, and the inlet and outlet of the external reforming oil filter 20 are controlled by valves.
[0020] Further, the outer supplemental reforming oil heat exchanger 4 is connected with the reforming oil tower outlet pipeline 7 through an outer supplemental reforming oil heat exchanger inlet pipeline 8 and an outer supplemental reforming oil heat exchanger outlet pipeline 9, the reforming oil tower outlet pipeline 7 is provided with a reforming oil tower overhead cooler 16, the outer supplemental reforming oil heat exchanger inlet pipeline 8 is connected before the reforming oil tower overhead cooler 16, and the outer supplemental reforming oil heat exchanger outlet pipeline 9 is connected after the reforming oil tower overhead cooler 16, the outer supplemental reforming oil heat exchanger inlet pipeline 8 is provided with an inlet valve 12, and the outer supplemental reforming oil heat exchanger outlet pipeline 9 is provided with an outlet valve 13; the outer supplemental reforming oil heat exchanger inlet pipeline 8 and the outer supplemental reforming oil heat exchanger outlet pipeline 9 are connected with the shell side of the outer supplemental reforming oil heat exchanger.
[0021] Further, the reforming oil tower outlet pipeline 7 is connected with the tower top outlet of the reforming oil tower 6, and the outlet of the reforming oil tower outlet pipeline 7 is connected with a reforming oil tower reflux tank.
[0022] Further, the outlet of the reforming oil heat exchange pipeline is connected to the reforming oil tower heat exchanger 19, and after heat exchange through the reforming oil tower heat exchanger, is connected to the reforming oil tower 6.
[0023] Further, the xylene deoxidizing tower 3 is provided with a xylene deoxidizing tower heat exchanger 22, the reforming oil heat exchange pipeline is connected with the xylene deoxidizing tower 3 after heat exchange through the xylene deoxidizing tower heat exchanger 22; the inlet of the xylene deoxidizing tower 3 is connected with the tube side of the xylene deoxidizing tower heat exchanger 22, and the outlet of the xylene deoxidizing tower 3 is connected with the shell side of the xylene deoxidizing tower heat exchanger 22.
[0024] Further, the reforming oil heat exchange pipeline is provided with a cross pipeline 5, the cross pipeline 5 is connected to a No. 2 reforming oil tower, and the cross pipeline 5 is provided with an adjusting valve 11.
[0025] Based on the above technical scheme, the reforming oil tower and the No. 2 reforming oil tower are not the same reaction tower, the system is operated in two devices, the flow processes of the two devices are basically the same, but both have a flow direction to the No. 2 reforming oil tower and the reforming oil tower, and the No. 2 reforming oil tower connected by the cross pipeline belongs to another device.
[0026] Further, a temperature detection device is connected to the outlet pipeline of the reforming oil tower overhead cooler 16 close to the reforming oil tower overhead cooler 16.
[0027] Working principle: as shown in the attached Figure 1 , according to the reforming oil tower 6 tower top reforming oil tower top air cooler 16 temperature is high, about 103 ℃, and the temperature is stable, the current reforming oil tower top air cooler 16 cold temperature setting 69 ℃, can be added bypass heat exchanger reforming oil tower top air cooler 16 and the outside of the heat exchange with the reforming oil, while the frequency air cooling can stabilize the cold temperature, according to the reforming oil tower top air cooler 16 cold temperature stop using air cooling, to achieve the purpose of saving electricity.
[0028] Working process: confirm that the newly added bypass heat exchanger and related valves and pipelines have been put into normal use.
[0029] Process: from the outside of the reforming oil → external reforming oil filter 20 → newly added heat exchanger tube → reforming oil steam heater 2 → xylene deoxidizing tower heat exchanger 22 (tube) → xylene deoxidizing tower 3 → xylene deoxidizing tower heat exchanger 22 (shell) → regulating valve group → reforming oil tower heat exchanger 19 (shell) → reforming oil tower 6.
[0030] According to the reforming oil tower 6 top temperature 103 ℃ or so and stable, when the outside of the reforming oil is introduced into the "newly added heat exchanger tube" heat exchange, enters the xylene deoxidizing tower, when using, slowly open the bypass valve No. 1 valve and No. 2 valve (use No. 1 valve card), then slowly close the main road No. 3 valve until full close, full close No. 4 valve, observe the reforming oil tower top air cooler 16 cold temperature and frequency change, ensure the cold temperature control 69 ℃.
[0031] Advantages of the transformation: according to the heat exchange temperature, the heat exchange temperature increases, then enters the xylene deoxidizing tower 3, so that the feed temperature of the reforming oil tower 6 increases, saving the use of fuel gas. The reforming oil tower top air cooler 16 cold temperature heat exchange frequency will drop, can be appropriately disabled air cooling, saving the power consumption.
[0032] The above disclosure is only the preferred embodiment of the present application, of course, cannot be limited by the scope of the application, therefore, the equivalent changes made according to the claims of the present application, still belongs to the scope covered by the present application.
Claims
1. An aromatics complex adds a bypass external reforming oil heat exchange system, characterized in that: It includes a reforming oil heat exchange pipeline and a reforming oil tower; a reforming oil steam heater (2) and a xylene deoxygenation tower (3) are connected in sequence on the reforming oil heat exchange pipeline, and the inlet of the reforming oil steam heater (2) is connected to an externally supplied reforming oil pipeline section (1); an externally supplied reforming oil heat exchanger (4) is connected to the externally supplied reforming oil pipeline section (1); the externally supplied reforming oil heat exchanger (4) is connected to the outlet pipeline (7) of the reforming oil tower; and the outlet of the reforming oil heat exchange pipeline is connected to the reforming oil tower (6).
2. The aromatics complex with added bypass external reforming oil heat exchange system according to claim 1, characterized in that: The externally supplied reforming oil heat exchanger (4) is connected to the externally supplied reforming oil pipeline section (1) via pipeline No. 1 (23) and pipeline No. 2 (24). The externally supplied reforming oil pipeline section (1) is equipped with two valves, with pipeline No. 1 (23) connected to the front of the two valves and pipeline No. 2 (24) connected to the rear of the two valves. Pipeline No. 1 (31) is installed on pipeline No. 1 (23), and pipeline No. 2 (32) is installed on pipeline No. 2 (24). Pipeline No. 1 (23) and pipeline No. 2 (24) are connected to the tube side of the externally supplied reforming oil heat exchanger (4). The two valves include valve No. 3 (33) and valve No. 4 (34) connected in series, with valve No. 3 (33) installed in front of valve No. 4 (34).
3. The aromatics complex according to claim 2, characterized in that: The external reforming oil pipeline section (1) is connected to the external reforming oil filter (20) before the inlet of pipeline No. 1 (23). The external reforming oil pipeline section (1) is equipped with a filter bypass valve (21). The external reforming oil filter (20) is connected to the external reforming oil pipeline section (1) through the filter inlet pipeline and the filter outlet pipeline. The filter inlet pipeline is connected before the filter bypass valve (21), and the filter outlet pipeline is connected after the filter bypass valve (21). The inlet and outlet of the external reforming oil filter (20) are both controlled by valves.
4. The aromatics complex with added bypass external reforming oil heat exchange system according to claim 1, characterized in that: The externally supplied reforming oil heat exchanger (4) is connected to the reforming oil tower outlet pipeline (7) via an externally supplied reforming oil heat exchanger inlet pipeline (8) and an externally supplied reforming oil heat exchanger outlet pipeline (9). A reforming oil tower top air cooler (16) is installed on the reforming oil tower outlet pipeline (7). The externally supplied reforming oil heat exchanger inlet pipeline (8) is connected to the front of the reforming oil tower top air cooler (16), and the externally supplied reforming oil heat exchanger outlet pipeline (9) is connected to the rear of the reforming oil tower top air cooler (16). An inlet valve (12) is installed on the externally supplied reforming oil heat exchanger inlet pipeline (8), and an outlet valve (13) is installed on the externally supplied reforming oil heat exchanger outlet pipeline (9). The externally supplied reforming oil heat exchanger inlet pipeline (8) and the externally supplied reforming oil heat exchanger outlet pipeline (9) are connected to the shell side of the externally supplied reforming oil heat exchanger.
5. The aromatics complex according to claim 1, characterized in that: The inlet of the reforming oil tower outlet pipeline (7) is connected to the top outlet of the reforming oil tower (6), and the outlet of the reforming oil tower outlet pipeline (7) is connected to the reforming oil tower reflux tank.
6. The aromatics complex according to claim 1, characterized in that: The outlet of the reforming oil heat exchange pipeline is connected to the reforming oil tower heat exchanger (19), and after heat exchange in the reforming oil tower heat exchanger, it is connected to the reforming oil tower (6).
7. The aromatics complex with added bypass external reforming oil heat exchange system according to claim 1, characterized in that: The xylene deoxygenation tower (3) is equipped with a xylene deoxygenation tower heat exchanger (22). The reforming oil heat exchange pipeline is connected to the xylene deoxygenation tower (3) after heat exchange through the xylene deoxygenation tower heat exchanger (22). The inlet of the xylene deoxygenation tower (3) is connected to the tube side of the xylene deoxygenation tower heat exchanger (22), and the outlet of the xylene deoxygenation tower (3) is connected to the shell side of the xylene deoxygenation tower heat exchanger (22).
8. The aromatics complex with added bypass external reforming oil heat exchange system according to claim 1, characterized in that: A bypass pipeline (5) is provided on the reforming oil heat exchange pipeline. The bypass pipeline (5) is connected to the No. 2 reforming oil tower. A regulating valve (11) is provided on the bypass pipeline (5).