Steam stripping feeding system of reforming device
By designing a pre-hydrogenation unit heat exchanger and heating furnace in the reforming device, the liquid phase separated from the high-temperature hot material and the high-component gas-liquid liquid are heat exchanged, and the stripping tower bottom reboiler in the prior art is solved. The problem of large steam consumption has achieved the effect of reducing steam consumption and reducing electricity consumption, achieving the purpose of saving energy and reducing consumption.
Patent Information
- Application Number
- CN202323589614.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-27
AI Technical Summary
The reboiler at the bottom of the stripping tower in the existing reforming device is heated by 3.5MPa steam, resulting in high energy consumption of heat sources and increased production costs.
A reforming device stripping feed system is designed, and the liquid phase separated from high-temperature hot materials and high-component gas-liquid liquid is exchanged through a pre-hydrogenation unit heat exchanger, increasing the heat of the stripping tower feed, and reducing steam and provide a heat source through a heating furnace and a hydrogenation reactor.
The steam consumption of the stripping tower bottom reboiler is reduced, the electricity consumption is reduced, and the energy saving and consumption reduction effect is achieved.
Smart Images
Figure CN222173140U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of reforming devices in aromatics plants, and in particular relates to a stripping feeding system for a reforming device. Background Art
[0002] The reforming unit is a petrochemical equipment that uses naphtha as raw material to produce chemical raw materials or high-quality gasoline. There are multiple distillation towers in the reforming unit. Different products are separated at the top and bottom of the distillation tower according to the different boiling points of different components under the same pressure.
[0003] A reboiler is provided at the bottom of the stripping tower in the reforming device to heat the stripping tower. At present, the reboiler at the bottom of the stripping tower in the existing reforming device is heated by an external heat source heated by 3.5MPa steam. However, the stripping tower needs to be heated continuously, and the heat source required for heating by the external heat source used in the reboiler is high in energy consumption, and the steam consumption is relatively high, resulting in an increase in production costs. Summary of the invention
[0004] In view of the defects of the prior art mentioned above, the purpose of the utility model is to provide a stripping feed system for a reforming unit to reduce the amount of 3.5MPa steam used in the reboiler at the bottom of the stripping tower, thereby achieving the effect of energy saving and emission reduction.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a reforming device stripping feed system, including a stripping tower and a reforming device pre-hydrogenation unit heat exchanger, the material outlet of the reforming device pre-hydrogenation unit heat exchanger is connected to a thermal high-separation system through a pipeline, the tank top gas phase outlet of the thermal high-separation system is connected to an air cooler and a high-separation gas-liquid separation tank in sequence through a gas outlet pipeline, the liquid phase outlet of the high-separation gas-liquid separation tank is connected to the stripping tower feed pipeline, and the stripping tower feed pipeline is connected to the stripping tower inlet after heat exchange by a heat exchange group; the tank bottom liquid phase outlet of the thermal high-separation system is connected to the stripping tower feed pipeline through a liquid outlet pipeline, the outlet end of the liquid outlet pipeline is connected to the front road of the heat exchange group, and a first flow control valve group is arranged on the liquid outlet pipeline.
[0006] Furthermore, a first valve is provided at the inlet of the liquid outlet pipeline.
[0007] Furthermore, a second valve and a second flow control valve group are sequentially arranged on the stripping tower feed pipeline, and the second valve and the second flow control valve group are connected to the front path of the outlet end of the liquid outlet pipeline.
[0008] Furthermore, the heat exchange group includes a first feed heat exchanger and a second feed heat exchanger.
[0009] Furthermore, the gas phase outlet of the high-precision gas-liquid separation tank is connected to a fuel gas system and a flare system.
[0010] Furthermore, a reforming device stripping feed system also includes a hydrogenation reactor and a heating furnace. The heating furnace heats the material and is then connected to the hydrogenation reactor. The outlet of the hydrogenation reactor is connected to the material inlet of the pre-hydrogenation unit heat exchanger of the reforming device.
[0011] The beneficial effects of the utility model are as follows: the high-temperature hot material at the outlet of the tube side of the heat exchanger of the pre-hydrogenation unit of the reforming device is directly merged with the liquid phase separated by the high-fraction gas-liquid separation tank into the heat exchange group for heat exchange, the heat of the feed components of the stripping tower is increased, the temperature of the stripping tower system is increased, the 3.5MPa steam consumption of the reboiler at the bottom of the stripping tower is reduced, the load is reduced and the electricity consumption is reduced, thereby achieving the purpose of energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a process flow chart of the stripping feed system of the reforming device of the utility model;
[0013] In the figure: 1. stripping tower, 2. reforming unit pre-hydrogenation unit heat exchanger, 3. hot high-pressure separation system, 4. gas outlet pipeline, 5. air cooler, 6. high-pressure separation gas-liquid separation tank, 7. stripping tower feed pipeline, 8. first feed heat exchanger, 9. second feed heat exchanger, 10. liquid outlet pipeline, 11. first valve, 12. first flow control valve group, 13. second valve, 14. second flow control valve group, 15. fuel gas system, 16. flare system, 17. hydrogenation reactor, 18. heating furnace. DETAILED DESCRIPTION
[0014] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0015] See attached Figure 1A reforming device stripping feed system comprises a stripping tower 1 and a reforming device pre-hydrogenation unit heat exchanger 2, the material outlet of the reforming device pre-hydrogenation unit heat exchanger 2 is connected to a thermal high separation system 3 through a pipeline, the tank top gas phase outlet of the thermal high separation system 3 is connected to an air cooler 5 and a high separation gas-liquid separation tank 6 in sequence through a gas outlet pipeline 4, the gas phase outlet of the high separation gas-liquid separation tank 6 is connected to a fuel gas system 15 and a flare system 16, the liquid phase outlet of the high separation gas-liquid separation tank 6 is connected to a stripping tower feed pipeline 7, and the stripping tower feed pipeline 7 passes through a first feed heat exchanger 8 and The second feed heat exchanger 9 is connected to the inlet of the stripping tower 1 after heat exchange; the tank bottom liquid phase outlet of the thermal high separation system 3 is connected to the stripping tower feed pipeline 7 through the liquid outlet pipeline 10, and the outlet end of the liquid outlet pipeline 10 is connected to the front of the first feed heat exchanger 8, and the first valve 11 and the first flow control valve group 12 are arranged on the liquid outlet pipeline 10 in sequence; the stripping tower feed pipeline 7 is sequentially provided with a second valve 13 and a second flow control valve group 14, and the second valve 13 and the second flow control valve group 14 are connected to the front of the outlet end of the liquid outlet pipeline. The heat source of the reforming device pre-hydrogenation unit heat exchanger 2 is provided by the heating furnace 18, and the heating furnace 18 is heated to 290°C and connected to the hydrogenation reactor 17, and the outlet of the hydrogenation reactor is connected to the pipe inlet of the reforming device pre-hydrogenation unit heat exchanger 2.
[0016] Based on the above technical solution, the outlet component of the tube side of the reforming unit pre-hydrogenation unit heat exchanger 2 is the naphtha after the hydrogenation reaction, the liquid phase outlet of the hot high-separation system 3 tank bottom is the naphtha after the hydrogenation reaction, and the gas phase outlet of the tank top is the oil and gas component containing hydrocarbons. The liquid phase outlet of the high-separation gas-liquid separation tank 6 tank bottom is the naphtha after the hydrogenation reaction, and the gas phase outlet of the tank top is the fuel gas component.
[0017] The outlet temperature of the pre-hydrogenation unit heat exchanger 2 of the reforming unit of the aromatics plant reforming unit is relatively high at 120°C. After cooling to 40°C by the air cooler 5, it enters the high-separation gas-liquid separation tank 6. Then, the gas-liquid separation liquid phase enters the first feed heat exchanger 8 shell side heat exchange and then enters the second feed heat exchanger 9 shell side, and finally the liquid phase oil product reaches the stripping tower 1. If the hot high-separation system 3 is added, the high-temperature hot material at the outlet of the pre-hydrogenation unit heat exchanger 2 of the reforming unit is directly merged with the liquid phase separated by the high-separation gas-liquid separation tank 6 to the first feed heat exchanger 8 shell side heat exchange, and the first feed heat exchanger 8 shell side heat exchanged by the second feed heat exchanger 9 shell side, and finally reaches the stripping tower 1. The heat of the feed component increases, the temperature of the stripping tower system increases, the steam consumption of the main heat source reboiler at the bottom of the stripping tower decreases, and the gaseous component separated by the hot high-separation system to the air cooler is reduced compared with the previous high-temperature hot material, the load is reduced, and the power consumption is reduced, thereby achieving the purpose of energy saving and consumption reduction.
[0018] The present invention does not disclose some common knowledge in the art.
[0019] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0020] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.
Claims
1. A stripping feed system for a reforming unit, Features: It includes a stripping tower and a reforming device pre-hydrogenation unit heat exchanger, the material outlet of the reforming device pre-hydrogenation unit heat exchanger is connected to a thermal high-resolution system through a pipeline, the tank top gas phase outlet of the thermal high-resolution system is connected in sequence to an air cooler and a high-resolution gas-liquid separation tank through a gas outlet pipeline, the liquid phase outlet of the high-resolution gas-liquid separation tank is connected to a stripping tower feed pipeline, and the stripping tower feed pipeline is connected to a stripping tower inlet after heat exchange by a heat exchange group; the tank bottom liquid phase outlet of the thermal high-resolution system is connected to a stripping tower feed pipeline through a liquid outlet pipeline, the outlet end of the liquid outlet pipeline is connected to the front road of the heat exchange group, and a first flow control valve group is arranged on the liquid outlet pipeline.
2. A reforming device stripping feed system according to claim 1, Features: A first valve is arranged at the inlet of the liquid outlet pipeline.
3. A reforming device stripping feed system according to claim 1, Features: The stripping tower feed pipeline is provided with a second valve and a second flow control valve group in sequence, and the second valve and the second flow control valve group are connected to the front path of the outlet end of the liquid outlet pipeline.
4. A reforming device stripping feed system according to claim 1, Features: The heat exchange group includes a first feed heat exchanger and a second feed heat exchanger.
5. A reforming device stripping feed system according to claim 1, Features: The gas phase outlet of the high-precision gas-liquid separation tank is connected to the fuel gas system and the flare system.
6. A reforming device stripping feed system according to claim 1, Features: It also includes a hydrogenation reactor and a heating furnace. The heating furnace heats the material and is then connected to the hydrogenation reactor. The outlet of the hydrogenation reactor is connected to the material inlet of the pre-hydrogenation unit heat exchanger of the reforming device.