Industrial C10 crude aromatic hydrocarbon tower bottom waste heat recovery control system
By adding a heat exchanger to the disproportionating clay feed line, heat exchange is carried out between the bottom liquid of the industrial C10 crude aromatics tower and the disproportionating clay feed line, solving the problem of energy waste during the cooling process of the bottom product of the C10 crude aromatics tower, and realizing the recovery of waste heat and energy saving.
Patent Information
- Application Number
- CN202423249841.4
- 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 bottom product of the industrial C10 crude aromatics tower has a temperature difference of nearly 200°C during the cooling process, resulting in power consumption and energy waste. Existing technologies have failed to effectively recover the waste heat.
Add a heat exchanger to the disproportionating clay feed line to exchange heat between the bottom liquid of the industrial C10 crude aromatics tower and the disproportionating clay feed line. After the heat exchange, the material is returned to the air cooler inlet to achieve waste heat recovery.
It saves electricity to the air cooler and steam at the inlet of the disproportionated clay processor, increases the temperature of the feed/discharge heat exchanger, and reduces energy consumption.
Smart Images
Figure CN223780189U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower, specifically applied to the recovery and utilization of waste heat from the bottom product of the industrial C10 crude aromatics tower to the storage tank, belonging to the field of chemical technology. Background Technology
[0002] Because the bottom product of the industrial C10 crude aromatics tower needs to be cooled to the required temperature by the industrial C10 crude aromatics air cooler before being sent into the product tank in the tank area, the temperature difference before and after the cooling operation by the air cooler is nearly 200°C, resulting in power consumption and energy waste. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a waste heat recovery control system for the bottom of an industrial C10 crude aromatics tower. By adding a heat exchanger to the disproportionating clay feed line, the bottom liquid of the industrial C10 crude aromatics tower exchanges heat with the newly added heat exchanger on the disproportionating clay feed line through a pipeline. After heat exchange, the material returns to the inlet of the industrial C10 crude aromatics air cooler, thereby recovering the waste heat of the bottom liquid phase. At the same time, it saves the power consumption of the air cooler, the amount of steam at the inlet of the disproportionating clay processor, and increases the tube-side temperature of the feed / discharge heat exchanger of the disproportionating clay processor, thus saving energy consumption in the downstream path.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waste heat recovery control system for the bottom of an industrial C10 crude aromatics tower, comprising: an industrial C10 crude aromatics tower, a bottom outlet line, a bottom outlet pump, an air cooler, a disproportionating clay treatment unit, and a heat exchanger process; the bottom of the industrial C10 crude aromatics tower is connected to the bottom outlet line, a bottom outlet pump is installed on the bottom outlet line, the bottom outlet line is led out from the outlet of the bottom outlet pump and connected to the air cooler, and then led out from the air cooler and connected to the industrial C10 crude aromatics tank; one side of the industrial C10 crude aromatics tower is connected to the disproportionating clay treatment unit through the heat exchanger process for feed heat exchange, and the disproportionating clay treatment unit is connected to the benzene tower;
[0005] The above technical solution involves setting up a heat exchanger process in the feed of the disproportionated clay treatment unit, thereby exchanging heat between the bottom liquid of the industrial C10 crude aromatics tower and the heat exchanger through pipelines, and then returning it to the air cooler inlet of the bottom product line of the industrial C10 crude aromatics tower, thus achieving the recovery of waste heat in the bottom liquid phase.
[0006] Furthermore, the heat exchanger process includes: a heat exchanger, wherein the shell-side inlet of the heat exchanger is connected to a shell-side inlet pipeline, and the shell-side outlet of the heat exchanger is connected to a shell-side outlet pipeline; the shell-side inlet pipeline and the shell-side outlet pipeline are respectively connected to the disproportionated clay treatment unit; the tube-side inlet of the heat exchanger is connected to a tube-side inlet pipeline, one end of which is connected to the inlet of the tube side of the heat exchanger, and the other end is connected to the bottom production line of the tower; a tube-side inlet isolation valve and a drain valve are installed at the contact point of the tube-side inlet pipeline near the bottom production line of the tower; and the tube-side outlet of the heat exchanger is connected to a tube-side outlet pipeline, one end of which is connected to the outlet of the tube side of the heat exchanger, and the other end is connected to the bottom production line of the tower and near the air cooler inlet; a tube-side outlet isolation valve and a drain valve are installed at the contact point of the tube-side outlet pipeline near the bottom production line of the tower.
[0007] Furthermore, a bypass valve for the heat exchanger tubes is installed on the bottom extraction line between the inlet pipeline and the outlet pipeline of the heat exchanger tubes.
[0008] Furthermore, the disproportionated clay treatment unit includes: a disproportionated clay processor, a disproportionated clay processor feed line, a disproportionated clay processor feed / discharge heat exchanger, and a disproportionated clay processor heater; the disproportionated clay processor feed line is connected to the disproportionated clay processor feed / discharge heat exchanger, a pipeline leading out from the disproportionated clay processor feed / discharge heat exchanger is connected to the disproportionated clay processor heater, a pipeline leading out from the disproportionated clay processor heater is connected to the top of the disproportionated clay processor, the bottom of the disproportionated clay processor is connected to the disproportionated clay processor feed / discharge heat exchanger via a pipeline, and a pipeline leading out from the disproportionated clay processor feed / discharge heat exchanger is connected to the benzene tower via a regulating valve group;
[0009] Furthermore, the feed line of the disproportionating clay processor includes branch feeds from the mixed aromatics storage tank and the toluene storage tank, and each of the two branch feeds is equipped with a control valve group, a blind flange and a drain valve.
[0010] Furthermore, one end of the heat exchanger shell-side inlet pipeline is connected to the heat exchanger shell-side inlet, and the other end is connected to the disproportionating clay processor feed line. A heat exchanger shell-side inlet isolation valve and a drain valve are installed at the junction of the heat exchanger shell-side inlet pipeline and the disproportionating clay processor feed line. One end of the heat exchanger shell-side outlet pipeline is connected to the heat exchanger shell-side outlet, and the other end is connected to the disproportionating clay processor feed line. A heat exchanger shell-side outlet isolation valve and a drain valve are installed at the junction of the heat exchanger shell-side outlet pipeline and the disproportionating clay processor feed line.
[0011] Furthermore, a heat exchanger shell-side bypass valve is installed on the feed line of the disproportionated clay processor located between the inlet pipeline and the outlet pipeline of the heat exchanger shell side.
[0012] Furthermore, a temperature measuring instrument is also installed on the bottom extraction line of the tower downstream of the air cooler.
[0013] The beneficial effects of adopting this scheme for the waste heat recovery control system at the bottom of the industrial C10 crude aromatics tower are:
[0014] By installing a heat exchanger process on the bottom of the industrial C10 crude aromatics tower, heat exchange is conducted with the heat exchanger, increasing the feed temperature of the disproportionated clay treatment unit, thereby saving steam consumption of the disproportionated clay processor heater; adding a heat exchanger process can reduce the heat load of the air cooler at the bottom of the industrial C10 crude aromatics tower, saving air cooling power; by adding a heat exchanger process, the tube-side outlet temperature of the disproportionated clay processor feed / discharge heat exchanger is correspondingly increased, saving subsequent energy consumption. Attached Figure Description
[0015] Figure 1 This is a structural diagram of the present invention.
[0016] In the diagram, 1. Industrial C10 crude aromatics tower; 2. Bottom of tower feed line; 3. Bottom of tower feed pump; 4. Air cooler; 5. Heat exchanger; 6. Heat exchanger shell-side inlet pipeline; 7. Heat exchanger shell-side outlet pipeline; 8. Heat exchanger tube-side inlet pipeline; 9. Heat exchanger tube-side inlet isolation valve; 10. Heat exchanger tube-side inlet drain valve; 11. Heat exchanger tube-side outlet pipeline; 12. Heat exchanger tube-side outlet isolation valve; 13. Heat exchanger tube-side outlet. 14. Tube-side bypass valve of heat exchanger, 15. Disproportionated clay processor, 16. Disproportionated clay processor feed line, 17. Disproportionated clay processor feed / discharge heat exchanger, 18. Disproportionated clay processor heater, 19. Shell-side inlet isolation valve of heat exchanger, 20. Shell-side inlet drain valve of heat exchanger, 21. Shell-side outlet isolation valve of heat exchanger, 22. Shell-side outlet drain valve of heat exchanger, 23. Shell-side bypass valve of heat exchanger. Detailed Implementation
[0017] 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.
[0018] See Figure 1The control system for waste heat recovery at the bottom of an industrial C10 crude aromatics tower, as shown, includes: an industrial C10 crude aromatics tower 1, a bottom outlet line 2, a bottom outlet pump 3, an air cooler 4, a disproportionating clay treatment unit, and a heat exchanger process; the bottom of the industrial C10 crude aromatics tower 1 is connected to the bottom outlet line 2, the bottom outlet pump 3 is installed on the bottom outlet line 2, the bottom outlet line 2 is led out from the outlet of the bottom outlet pump 3 and connected to the air cooler 4, and then led out from the air cooler 4 and connected to the industrial C10 crude aromatics tank; one side of the industrial C10 crude aromatics tower is connected to the disproportionating clay treatment unit through the heat exchanger process for feed heat exchange; the disproportionating clay treatment unit is connected to the benzene tower.
[0019] Furthermore, the heat exchanger process includes: a heat exchanger 5, the shell-side inlet of which is connected to a heat exchanger shell-side inlet pipeline 6, and the shell-side outlet of which is connected to a heat exchanger shell-side outlet pipeline 7; the heat exchanger shell-side inlet pipeline 6 and the heat exchanger shell-side outlet pipeline 7 are respectively connected to the disproportionated clay treatment unit; the tube-side inlet of the heat exchanger 5 is connected to a heat exchanger tube-side inlet pipeline 8, one end of which is connected to the inlet of the tube side of the heat exchanger 5, and the other end is connected to the bottom production line 2. A heat exchanger tube-side inlet valve 9 and a drain valve 10 are installed at the contact point of the heat exchanger tube-side inlet line 8 near the bottom of the tower outlet line 2; a heat exchanger tube-side outlet line 11 is connected to the tube-side outlet of the heat exchanger 5, one end of the heat exchanger tube-side outlet line 11 is connected to the outlet of the tube side of the heat exchanger 5, and the other end is connected to the bottom of the tower outlet line 2 and is close to the inlet of the air cooler 4. A heat exchanger tube-side outlet valve 12 and a drain valve 13 are installed at the contact point of the heat exchanger tube-side outlet line 11 near the bottom of the tower outlet line 2.
[0020] Furthermore, a heat exchanger tube bypass valve 14 is installed on the bottom extraction line 2 located between the heat exchanger tube inlet line 8 and the heat exchanger tube outlet line 11.
[0021] Furthermore, the disproportionated clay treatment unit includes: a disproportionated clay processor 15, a disproportionated clay processor feed line 16, a disproportionated clay processor feed / discharge heat exchanger 17, and a disproportionated clay processor heater 18; the disproportionated clay processor feed line 16 is connected to the disproportionated clay processor feed / discharge heat exchanger, a pipeline leading out from the disproportionated clay processor feed / discharge heat exchanger is connected to the disproportionated clay processor heater 18, a pipeline leading out from the disproportionated clay processor heater 18 is connected to the top of the disproportionated clay processor 15, the bottom of the disproportionated clay processor 15 is connected to the disproportionated clay processor feed / discharge heat exchanger via a pipeline, and a pipeline leading out from the disproportionated clay processor feed / discharge heat exchanger is connected to the benzene tower via a regulating valve group;
[0022] Furthermore, the disproportionating clay processor feed line 16 includes branch feeds from the mixed aromatics storage tank and the toluene storage tank, and each of the two branch feeds is equipped with a control valve group, a blind flange and a drain valve.
[0023] Furthermore, one end of the heat exchanger shell-side inlet pipeline 6 is connected to the shell-side inlet of heat exchanger 5, and the other end is connected to the disproportionating clay processor feed line 16. A heat exchanger shell-side inlet isolation valve 19 and a drain valve 20 are installed at the junction of the heat exchanger shell-side inlet pipeline 6 and the disproportionating clay processor feed line 16. One end of the heat exchanger shell-side outlet pipeline 7 is connected to the shell-side outlet of heat exchanger 5, and the other end is connected to the disproportionating clay processor feed line 16. A heat exchanger shell-side outlet isolation valve 21 and a drain valve 22 are installed at the junction of the heat exchanger shell-side outlet pipeline 7 and the disproportionating clay processor feed line 16.
[0024] Furthermore, a heat exchanger shell-side bypass valve 23 is installed on the disproportionation clay processor feed line 16 located between the heat exchanger shell-side inlet pipeline 6 and the heat exchanger shell-side outlet pipeline 7.
[0025] Under normal conditions, the waste heat recovery control system of this scheme allows the bottom product of the industrial C10 crude aromatics tower 1 to enter the storage tank after reaching the required temperature through the air cooler 4. When the heat exchanger process is in operation, the bottom material of the industrial C10 crude aromatics tower 1 returns to the inlet of the air cooler 4 after being heated by the heat exchanger 5 as the feed for the disproportionating clay processor. The remaining temperature is controlled to meet the control requirements through air cooling. The mixture of aromatics and toluene in the feed of the disproportionating clay processor enters the heat exchanger 5 for heat exchange and then returns to the original pipeline to enter the feed heat exchanger of the disproportionating clay processor.
[0026] When putting it into operation, first open the shell-side inlet isolation valve 19 and the shell-side outlet isolation valve 21 of the heat exchanger. After stabilization, close the shell-side bypass valve 23. After the shell side is put into operation, open the tube-side inlet isolation valve 9 and the tube-side outlet isolation valve 12 of the heat exchanger in sequence, and close the tube-side bypass valve 14. After heat exchange, observe the temperature change of the temperature measuring instrument at the temperature measuring point after the air cooler 4. If the temperature is higher than the normal control, adjust the air cooler frequency converter to control the temperature to the control value. If the temperature is lower than or close to the normal control, the air cooler 4 can be completely shut down.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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. A waste heat recovery control system for the bottom of an industrial C10 crude aromatics tower, characterized in that, include: The process includes an industrial C10 crude aromatics tower, a bottom outflow line, a bottom outflow pump, an air cooler, a disproportionating clay treatment unit, and a heat exchanger. The bottom of the industrial C10 crude aromatics tower is connected to the bottom outflow line, which is equipped with a bottom outflow pump. The bottom outflow line is led out from the outlet of the bottom outflow pump and connected to the air cooler, and then led out from the air cooler and connected to the industrial C10 crude aromatics tank. A heat exchanger is located on one side of the industrial C10 crude aromatics tower and connected to the disproportionating clay treatment unit, which is connected to the benzene tower.
2. The waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower according to claim 1, characterized in that: The heat exchanger process includes: a heat exchanger, wherein the shell-side inlet of the heat exchanger is connected to a shell-side inlet pipeline, and the shell-side outlet of the heat exchanger is connected to a shell-side outlet pipeline; the shell-side inlet pipeline and the shell-side outlet pipeline are respectively connected to the disproportionated clay treatment unit; the tube-side inlet of the heat exchanger is connected to a tube-side inlet pipeline, one end of which is connected to the inlet of the tube side of the heat exchanger, and the other end is connected to the bottom production line of the tower; a tube-side inlet isolation valve and a drain valve are installed at the contact point of the tube-side inlet pipeline near the bottom production line of the tower; the tube-side outlet of the heat exchanger is connected to a tube-side outlet pipeline, one end of which is connected to the outlet of the tube side of the heat exchanger, and the other end is connected to the bottom production line of the tower and near the air cooler inlet; a tube-side outlet isolation valve and a drain valve are installed at the contact point of the tube-side outlet pipeline near the bottom production line of the tower.
3. The waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower according to claim 2, characterized in that: A bypass valve for the heat exchanger tubes is installed on the bottom extraction line between the inlet pipeline and the outlet pipeline of the heat exchanger tubes.
4. The waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower according to claim 2, characterized in that: The disproportionated clay treatment unit includes: a disproportionated clay processor, a disproportionated clay processor feed line, a disproportionated clay processor feed / discharge heat exchanger, and a disproportionated clay processor heater; the disproportionated clay processor feed line is connected to the disproportionated clay processor feed / discharge heat exchanger, a pipeline leading out from the disproportionated clay processor feed / discharge heat exchanger is connected to the disproportionated clay processor heater, a pipeline leading out from the disproportionated clay processor heater is connected to the top of the disproportionated clay processor, the bottom of the disproportionated clay processor is connected to the disproportionated clay processor feed / discharge heat exchanger via a pipeline, and a pipeline leading out from the disproportionated clay processor feed / discharge heat exchanger is connected to the benzene tower via a regulating valve group.
5. The waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower according to claim 4, characterized in that: The disproportionating clay processor feed line includes branch feeds from a mixed aromatics storage tank and a toluene storage tank. Each of the two branch feeds is equipped with a control valve group, a blind flange, and a drain valve.
6. The waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower according to claim 4, characterized in that: One end of the heat exchanger shell-side inlet pipeline is connected to the heat exchanger shell-side inlet, and the other end is connected to the disproportionating clay processor feed line. A heat exchanger shell-side inlet isolation valve and a drain valve are installed at the junction of the heat exchanger shell-side inlet pipeline and the disproportionating clay processor feed line. One end of the heat exchanger shell-side outlet pipeline is connected to the heat exchanger shell-side outlet, and the other end is connected to the disproportionating clay processor feed line. A heat exchanger shell-side outlet isolation valve and a drain valve are installed at the junction of the heat exchanger shell-side outlet pipeline and the disproportionating clay processor feed line.
7. The waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower according to claim 6, characterized in that: A shell-side bypass valve is installed on the feed line of the disproportionated clay processor located between the shell-side inlet pipeline and the shell-side outlet pipeline of the heat exchanger.
8. The waste heat recovery control system at the bottom of an industrial C10 crude aromatics tower according to claim 1, characterized in that: A temperature measuring instrument is also installed on the bottom extraction line of the tower downstream of the air cooler.