Carclazyte tower feeding system
By adding a filter unit and a heat exchanger bypass split-range control to the white clay tower feeding system, the problems of impurities and temperature limitations in the white clay tower were solved, and differential pressure control and temperature management of the white clay tower were realized, thus extending the service life of the white clay tower.
Patent Information
- Application Number
- CN202423202112.3
- 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
The presence of many solid impurities in the bleaching tower leads to increased pressure differential and shortened service life. Furthermore, the heat exchanger is limited by the inlet temperature and cannot reach the minimum operating temperature, thus affecting the service life of the bleaching tower.
Design a bleaching tower feeding system, including a filtration unit and a heat exchanger bypass split-range control system. Impurities are removed by adding a filtration unit, and the inlet temperature of the bleaching tower is reduced to 130°C by bypass control.
Effectively control the pressure difference rise in the white clay tower, extend the life of the white clay, reduce the inlet temperature, and improve the efficiency of the white clay tower.
Smart Images
Figure CN223774803U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of chemical technology, especially a clay tower feeding system. BACKGROUND
[0002] The design operation pressure of the clay tower is 1.91MPa, the design upper limit pressure is 3.9MPa, the first cause is that the solid impurities of the material are too much, which leads to the pressure difference of the clay tower to be increased, and the clay to be scrapped in advance; the second cause is that the heat exchanger is limited, and the inlet temperature can only be reduced to 150 DEG C, which cannot reach the minimum initial temperature of 130 DEG C for use, leading to the service life of the clay to be shortened; the above are the main two reasons leading to the service life of the clay to be shortened. CONTENT
[0003] In view of the above problems, the purpose of the present application is to provide a clay tower feeding system, which can prolong the service life of the clay.
[0004] In order to achieve part or all of the above purposes or other purposes, the present application provides the following technical scheme: a clay tower feeding system, comprising a reforming oil tower, a feeding pipeline, a heat exchanger pipeline, a heat exchanger bypass pipeline and a clay tower pipeline; a filtering unit is connected to the feeding pipeline, the inlet of the feeding pipeline is connected to the outlet of the bottom of the reforming oil tower, the outlet of the feeding pipeline is connected to the inlet of the heat exchanger pipeline, the outlet of the heat exchanger pipeline is connected to the inlet of the clay tower pipeline, the outlet of the clay tower pipeline is connected to the inlet of the clay tower, and a first flow control valve and a heat exchanger are connected to the heat exchanger pipeline in sequence; the outlet of the feeding pipeline is also connected to the inlet of the heat exchanger bypass pipeline, the outlet of the heat exchanger bypass pipeline is connected to the inlet of the clay tower pipeline, and a second flow control valve is connected to the heat exchanger bypass pipeline.
[0005] Further, a hot material pipeline is further included, the hot material pipeline is connected to the tube side of the heat exchanger, the inlet of the hot material pipeline is connected to the hot material, and the outlet of the hot material pipeline is connected to a xylene redistillation tower; the heat exchanger pipeline is connected to the shell side of the heat exchanger.
[0006] Further, a third control valve group is connected to the hot material pipeline, and the third control valve group is connected to the rear of the heat exchanger.
[0007] Further, a first flow indication adjustment is arranged between the first flow control valve and the second flow control valve; a second flow indication adjustment and a temperature indication control table are connected to the third control valve group and the clay tower pipeline in sequence; and the first flow indication adjustment and the temperature indication control table are connected.
[0008] Further, a pump is further connected to the feeding pipeline, the pump is connected to the front of the filtering unit; a pump outlet temperature table is connected to the feeding pipeline, and the pump outlet temperature table is connected between the pump and the filtering unit.
[0009] Further, the filter unit comprises a first filter pipeline, a second filter pipeline, a first cross pipeline and a second cross pipeline; the first filter pipeline and the second filter pipeline are arranged in parallel; a first filter is connected on the first filter pipeline, and a second filter is connected on the second filter pipeline; an inlet of the first cross pipeline is connected at a rear way of the first filter, and an outlet of the first cross pipeline is connected at a front way of the second filter; an inlet of the second cross pipeline is connected at a rear way of the second filter, and an outlet of the second cross pipeline is connected at a front way of the first filter.
[0010] Further, two valves are arranged respectively at the front way and the rear way of the first filter on the first filter pipeline, and two valves are arranged respectively at the front way and the rear way of the second filter on the second filter pipeline; the inlet of the first cross pipeline is connected between the two valves at the rear way of the first filter, and the outlet of the first cross pipeline is connected between the two valves at the front way of the second filter; the inlet of the second cross pipeline is connected between the two valves at the rear way of the second filter, and the outlet of the second cross pipeline is connected between the two valves at the front way of the first filter; one valve is arranged respectively near the outlet and the inlet of the first cross pipeline, and one valve is arranged respectively near the outlet and the inlet of the second cross pipeline.
[0011] Further, a first differential pressure indicator is connected between the inlet and the outlet of the first filter, and a second differential pressure indicator is connected between the inlet and the outlet of the second filter.
[0012] Compared with the prior art, the beneficial effects of the utility model are that the filter unit is added to filter impurities, the differential pressure of the clay tower is effectively controlled, the bypass control system of the heat exchanger is added, the inlet temperature of the clay tower is reduced to 130 DEG C, and the service life of the clay is effectively prolonged through the above modification. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 The flow chart of the utility model;
[0014] Fig. 2 The flow chart before the filter unit and the bypass of the heat exchanger are added;
[0015] In the figure: 1, reforming oil tower, 2, filter unit, 3, No. 1 flow control valve, 4, heat exchanger, 5, white clay tower, 6, No. 2 flow control valve, 7, xylene redistillation tower, 8, No. 3 control valve group, 9, No. 1 filter, 10, No. 2 filter, 11, pump, 21, feed line, 22, heat exchanger line, 23, heat exchanger bypass line, 24, white clay tower line, 25, hot material line, 26, first filter line, 27, second filter line, 28, first cross line, 29, second cross line, 31, No. 1 differential pressure indicator, 32, No. 2 differential pressure indicator, 33, No. 1 flow indicator adjustment, 34, No. 2 flow indicator adjustment, 35, temperature indicator control table, 36, pump outlet temperature table. DETAILED DESCRIPTION
[0016] 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 in combination with the drawings in the utility model embodiment.
[0017] Referring to the drawings Figs. 1-2 A white clay tower feed system, comprising a reforming oil tower 1, a feed line 21, a heat exchanger line 22, a heat exchanger bypass line 23 and a white clay tower line 24; the feed line 21 is connected with a filter unit 2, the inlet of the feed line 21 is connected with the outlet at the bottom of the reforming oil tower 1, the outlet of the feed line 21 is connected with the inlet of the heat exchanger line 22, the outlet of the heat exchanger line 22 is connected with the inlet of the white clay tower line 24, the outlet of the white clay tower line 24 is connected with the inlet of the white clay tower 5, the heat exchanger line 22 is sequentially connected with a No. 1 flow control valve 3 and a heat exchanger 4; the outlet of the feed line 21 is also connected with the inlet of the heat exchanger bypass line 23, the outlet of the heat exchanger bypass line 23 is connected with the inlet of the white clay tower line 24, and the heat exchanger bypass line 23 is connected with a No. 2 flow control valve 6.
[0018] Based on the above technical scheme, a heat exchanger bypass split-range control system is added, and the white clay tower inlet temperature is reduced to 130 DEG C.
[0019] It also comprises a hot material line 25, the hot material line 25 is connected with the tube side of the heat exchanger 4, the inlet of the hot material line 25 is connected with hot material, and the outlet of the hot material line 25 is connected with the xylene redistillation tower 7; the heat exchanger line 22 is connected with the shell side of the heat exchanger 4.
[0020] The hot material line 25 is connected with a No. 3 control valve group 8, and the No. 3 control valve group 8 is connected to the back way of the tube side of the heat exchanger 4.
[0021] The first flow control valve 3 and the second flow control valve 6 are provided with a first flow indication adjustment 33, and the main flow is controlled by the first flow indication adjustment 33; the third control valve group 8 and the white soil tower pipeline 24 are sequentially connected with a second flow indication adjustment 34 and a temperature indication control table 35; the first flow indication adjustment 33 and the temperature indication control table 35 are connected; and the third flow control valve 8 is set to a low limit of 10% valve position to prevent the heat exchanger 4 from being damaged.
[0022] The feed pipeline 21 is also connected with a pump 11, and the pump 11 is connected in the front way of the filtering unit 2; the feed pipeline 21 is connected with a pump outlet temperature table 36, and the pump outlet temperature table 36 is connected between the pump 11 and the filtering unit 2.
[0023] The filtering unit 2 comprises a first filtering pipeline 26, a second filtering pipeline 27, a first cross pipeline 28 and a second cross pipeline 29; the first filtering pipeline 26 and the second filtering pipeline 27 are provided in parallel; the first filtering pipeline 26 is connected with a first filter 9, and the second filtering pipeline 27 is provided with a second filter 10; the inlet of the first cross pipeline 28 is connected in the rear way of the first filter 9, and the outlet of the first cross pipeline 28 is connected in the front way of the second filter 10; the inlet of the second cross pipeline 29 is connected in the rear way of the second filter 10, and the outlet of the second cross pipeline 29 is connected in the front way of the first filter 9.
[0024] The front way and the rear way of the first filter 9 on the first filtering pipeline 26 are respectively provided with two valves, and the front way and the rear way of the second filter 10 on the second filtering pipeline 27 are respectively provided with two valves; the inlet of the first cross pipeline 28 is connected between the two valves in the rear way of the first filter 9, and the outlet of the first cross pipeline 28 is connected between the two valves in the front way of the second filter 10; the inlet of the second cross pipeline 29 is connected between the two valves in the rear way of the second filter 10, and the outlet of the second cross pipeline 29 is connected between the two valves in the front way of the first filter 9; one valve is respectively arranged near the inlet and the outlet of the first cross pipeline 28, and one valve is respectively arranged near the inlet and the outlet of the second cross pipeline 29.
[0025] A first differential pressure indication table 31 is connected between the inlet and the outlet of the first filter 9, and a second differential pressure indication table 32 is connected between the inlet and the outlet of the second filter 10.
[0026] Based on the above technical scheme, there are 12 front and rear gate valves of the first filter 9 and the second filter 10 in the filtering unit, which form a single tower cross pipeline and can also be operated in series.
[0027] Operation requirements:
[0028] 1. Before using the first filter 9 and after using the second filter 10, use them in series through the cross-line process to realize series operation; when the pressure difference of the current filter reaches pressure difference > 0.1 MPa, remove and clean the first filter 9, and in the next cycle, use the second filter 10 before the first filter 9.
[0029] 2. Use the first flow control valve 3 and the second flow control valve 6 to control the system in stages, and the condition loop is that when the temperature indicating control table 35 controls 130℃, and the valve position of the third control valve group 8 is as low as 10%, trigger the temperature indicating control table 35→the first flow indicating adjustment 33→the first flow control valve 3 and the second flow control valve 6, 0-100% control in stages.
[0030] The above only discloses the preferred embodiments of the present application, of course, cannot limit the scope of the rights of the present 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. A clay tower feed system characterized by: The application relates to a xylene rectification system, which comprises a reforming oil tower (1), a feed pipeline (21), a heat exchanger pipeline (22), a heat exchanger bypass pipeline (23) and a clay tower pipeline (24); a filtering unit (2) is connected to the feed pipeline (21); the inlet of the feed pipeline (21) is connected to the outlet of the bottom of the reforming oil tower (1); the outlet of the feed pipeline (21) is connected to the inlet of the heat exchanger pipeline (22); the outlet of the heat exchanger pipeline (22) is connected to the inlet of the clay tower pipeline (24); the outlet of the clay tower pipeline (24) is connected to the inlet of a clay tower (5); a first flow control valve (3) and a heat exchanger (4) are connected to the heat exchanger pipeline (22) in sequence; the outlet of the feed pipeline (21) is also connected to the inlet of the heat exchanger bypass pipeline (23); the outlet of the heat exchanger bypass pipeline (23) is connected to the inlet of the clay tower pipeline (24); a second flow control valve (6) is connected to the heat exchanger bypass pipeline (23).
2. A clay tower feed system according to claim 1 wherein: The system further comprises a hot material pipeline (25), which is connected to the tube side of the heat exchanger (4); the inlet of the hot material pipeline (25) is connected to hot material; the outlet of the hot material pipeline (25) is connected to a xylene redistillation tower (7); the heat exchanger pipeline (22) is connected to the shell side of the heat exchanger (4).
3. A clay tower feed system according to claim 2, characterised in that: A third control valve group (8) is connected to the hot material pipeline (25) and is connected to the rear side of the heat exchanger (4).
4. A clay tower feed system according to claim 3, wherein: A first flow indication adjustment (33) is arranged between the first flow control valve (3) and the second flow control valve (6); a second flow indication adjustment (34) and a temperature indication control table (35) are connected between the third control valve group (8) and the clay tower pipeline (24) in sequence; the first flow indication adjustment (33) and the temperature indication control table (35) are connected.
5. A clay tower feed system according to claim 1 wherein: A pump (11) is further connected to the feed pipeline (21) and is connected to the front side of the filtering unit (2); a pump outlet temperature table (36) is connected to the feed pipeline (21) and is connected between the pump (11) and the filtering unit (2).
6. A clay tower feed system according to claim 1 wherein: The filtering unit (2) comprises a first filtering pipeline (26), a second filtering pipeline (27), a first cross pipeline (28) and a second cross pipeline (29); the first filtering pipeline (26) and the second filtering pipeline (27) are arranged in parallel; a first filter (9) is connected to the first filtering pipeline (26); a second filter (10) is connected to the second filtering pipeline (27); the inlet of the first cross pipeline (28) is connected to the rear side of the first filter (9); the outlet of the first cross pipeline (28) is connected to the front side of the second filter (10); the inlet of the second cross pipeline (29) is connected to the rear side of the second filter (10); the outlet of the second cross pipeline (29) is connected to the front side of the first filter (9).
7. A clay tower feed system according to claim 6, characterised in that: The first filter pipeline (26) is provided with two valves in front and back of the first filter (9), and the second filter pipeline (27) is provided with two valves in front and back of the second filter (10); the inlet of the first cross pipeline (28) is connected between the two valves in back of the first filter (9), and the outlet of the first cross pipeline (28) is connected between the two valves in front of the second filter (10); the inlet of the second cross pipeline (29) is connected between the two valves in back of the second filter (10), and the outlet of the second cross pipeline (29) is connected between the two valves in front of the first filter (9); one valve is arranged on the first cross pipeline (28) near the outlet and the inlet, and one valve is arranged on the second cross pipeline (29) near the outlet and the inlet.
8. A clay tower feed system according to claim 7, characterised in that: A first differential pressure indicator (31) is connected between the inlet and the outlet of the first filter (9), and a second differential pressure indicator (32) is connected between the inlet and the outlet of the second filter (10).