Methylacetylene and propadiene removal device
By using SHP reactor and palladium hydrogenation catalyst in the removal device, the methylacetylene and propylene in the reactor are solved, and the effects of extending the operation cycle and reducing costs are achieved.
Patent Information
- Application Number
- CN202421743325.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-23
AI Technical Summary
Methylacetylene and propidene enter the reactor, causing coking of the dehydrogenation catalyst and causing the internal and external grid of the reactor to be blocked.
A removal device including a SHP reactor is designed, which is filled with a palladium hydrogenation catalyst. By controlling the structure and surface properties of the catalyst, methylacetylene and propylene in the liquid phase product are converted to prevent the catalyst from coking. At the same time, electrochemical sensors, strain gauge pressure sensors, infrared temperature sensors and mass flowmeters are used for real-time monitoring and control to ensure the safe and stable operation of the system.
Effectively prevent dehydrogenation catalyst from coking, avoid blockage of internal and external grid of the reactor, prolong the operation cycle, reduce the frequency of replacement, reduce costs, and ensure production continuity and catalyst regeneration treatment.
Smart Images
Figure CN222855375U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of removal devices, in particular to a removal device for methylacetylene and propadiene. Background Art
[0002] Propane is an organic compound with the chemical formula CH3CH2CH3. It is a colorless and odorless gas, slightly soluble in water, soluble in ethanol and ether, with stable chemical properties and not easy to undergo chemical reactions. It is often used as a refrigerant, internal combustion engine fuel or organic synthesis raw material. In industrial applications, the raw material propane mainly undergoes dehydrogenation reaction at 630°C in the presence of a catalyst to produce propylene and hydrogen as well as a small amount of side reactions.
[0003] At present, the raw materials contain methylacetylene and propadiene, and side reactions occur during the reaction process. Some methylacetylene and propadiene are also present in the reaction products. Methylacetylene and propadiene enter the separation system along with the liquid products and are mixed into the circulating propane again. Therefore, there are the following disadvantages: these substances enter the reactor and cause coking of the dehydrogenation catalyst, thereby causing blockage of the inner and outer nets of the reactor. Utility Model Content
[0004] The utility model aims to provide a device for removing methylacetylene and propadiene, so as to solve the problem that these substances enter into the reactor and cause the dehydrogenation catalyst to coke, thus leading to the blockage of the inner and outer nets of the reactor.
[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a device for removing methylacetylene and propadiene, comprising an SHP reactor, the SHP reactor is arranged on the right side of the outer wall of a separation device, a delivery pipe is connected and fixed between the SHP reactor and the separation device, a PLC controller is fixed on the front side of the separation device, the SHP reactor is electrically connected to the PLC controller, a palladium hydrogenation catalyst is arranged inside the SHP reactor, a connecting pipe is connected and fixed on the right side of the outer wall of the SHP reactor, a first valve is arranged inside the delivery pipe, a PSA device is arranged on the front side of the outer wall of the SHP reactor, the PSA device is electrically connected to the PLC controller, an installation pipe is connected and fixed between the PSA device and the SHP reactor, a second valve is arranged inside the installation pipe, and the second valve is electrically connected to the PLC controller.
[0006] Preferably, a fixing hole is opened on the top surface of the delivery pipe, an electrochemical sensor is fixed inside the fixing hole, and the electrochemical sensor is electrically connected to the PLC controller.
[0007] Preferably, a flow pipe is connected and fixed to the rear side of the outer wall of the SHP reactor, a third valve is provided inside the flow pipe, and the third valve is electrically connected to the PLC controller.
[0008] Preferably, a connection hole is opened on the right side of the outer wall of the SHP reactor, and a strain gauge pressure sensor is fixed inside the connection hole.
[0009] Preferably, a mounting hole is provided on the top surface of the SHP reactor, and an infrared temperature sensor is fixed inside the mounting hole.
[0010] Preferably, a receiving hole is provided on the top surface of the delivery pipe, and a mass flow meter is fixed inside the receiving hole.
[0011] Compared with the prior art, the device for removing methylacetylene and propadiene using the above technical solution has the following beneficial effects:
[0012] 1. During use, the SHP reactor is loaded with a palladium hydrogenation catalyst to convert methylacetylene and propadiene in the liquid phase product into monoolefins. By controlling the material index at the outlet of the SHP reactor, the dehydrogenation catalyst is prevented from coking, the internal and external nets are prevented from being blocked, the operation cycle is extended, the replacement frequency is reduced, and the purpose of cost saving is achieved;
[0013] 2. During use, the electrochemical sensor facilitates real-time monitoring of hydrogen sulfide. When the hydrogen sulfide at the outlet of the SHP reactor is greater than ppm, it indicates that the catalyst may have failed or its performance has deteriorated. Then the information is transmitted to the PLC controller, and the SHP reactor is cut out for hot hydrogen stripping to ensure timely catalyst regeneration and performance maintenance. During the hot hydrogen stripping, in order to avoid interrupting the production process, the liquid phase product can be temporarily introduced directly into the separation device through the circulation pipe, which not only ensures the continuity of production, but also realizes the regeneration of the catalyst;
[0014] 3. During use, the strain gauge pressure sensor can accurately reflect the pressure changes in the SHP reactor in real time, which helps to detect and deal with abnormal situations in time and ensure the safe and stable operation of the system. The infrared temperature sensor is conducive to detecting the temperature inside the SHP reactor, which helps to maintain the appropriate working temperature in the SHP reactor. Through continuous monitoring, the reaction conditions can be adjusted in time to ensure that the SHP reactor operates at the optimal temperature, thereby improving product quality and yield. The mass flow meter is conducive to the quality of hydrogen inside the delivery pipe, thereby providing accurate flow data, further improving reaction efficiency and reducing raw material consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of an embodiment.
[0016] Figure 2 It is a schematic diagram of an explosion of an embodiment.
[0017] Figure 3It is an exploded schematic diagram of the connecting pipe and the mounting pipe in the embodiment.
[0018] Figure 4 For example Figure 2 Enlarged schematic diagram at point A in the middle.
[0019] In the figure: 1. SHP reactor; 2. separation device; 3. delivery pipe; 4. palladium hydrogenation catalyst; 5. connecting pipe; 6. first valve; 7. PSA device; 8. mounting pipe; 9. second valve; 10. fixing hole; 11. electrochemical sensor; 12. flow pipe; 13. third valve; 14. connecting hole; 15. strain gauge pressure sensor; 16. mounting hole; 17. infrared temperature sensor; 18. receiving hole; 19. mass flow meter. DETAILED DESCRIPTION
[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
[0021] like Figure 1-Figure 4 As shown, a device for removing methylacetylene and propadiene comprises an SHP reactor 1, which is arranged on the right side of the outer wall of a separation device 2, a delivery pipe 3 is connected and fixed between the SHP reactor 1 and the separation device 2, a PLC controller is fixed on the front side of the separation device 2, the SHP reactor 1 is electrically connected to the PLC controller, a palladium hydrogenation catalyst 4 is arranged inside the SHP reactor 1, a connecting pipe 5 is connected and fixed on the right side of the outer wall of the SHP reactor 1, a first valve 6 is arranged inside the delivery pipe 3, a PSA device 7 is arranged on the front side of the outer wall of the SHP reactor 1, the PSA device 7 is electrically connected to the PLC controller, an installation pipe 8 is connected and fixed between the PSA device 7 and the SHP reactor 1, a second valve 9 is arranged inside the installation pipe 8, and the second valve 9 is electrically connected to the PLC controller.
[0022] During use, the SHP reactor 1 is filled with a palladium hydrogenation catalyst 4 to remove methylacetylene and propadiene in the liquid phase product in a targeted manner, and the catalyst performance is improved by adjusting the structure and surface properties of the catalyst. A hot hydrogen stripping process is provided. When the test result shows that the hydrogen sulfide at the outlet of the SHP reactor 1 is greater than 2 ppm, it indicates that the catalyst performance has deteriorated. The SHP reactor 1 can be cut out for hot hydrogen stripping, and the hydrogen used for the hot hydrogen stripping comes from the high-purity hydrogen produced by the PSA device.
[0023] The SHP reactor 1 is filled with a palladium hydrogenation catalyst 4 for converting methylacetylene and propadiene in the liquid product into monoolefins. By controlling the material index at the outlet of the SHP reactor 1, the dehydrogenation catalyst is prevented from coking, the internal and external nets are prevented from being blocked, the operation cycle is extended, the replacement frequency is reduced, and the purpose of cost saving is achieved.
[0024] like Figure 1 and Figure 2 As shown, a fixing hole 10 is opened on the top surface of the delivery pipe 3, and an electrochemical sensor 11 is fixed inside the fixing hole 10. The electrochemical sensor 11 is electrically connected to the PLC controller.
[0025] During use, the electrochemical sensor 11 is used to monitor hydrogen sulfide in real time. When the hydrogen sulfide at the outlet of the SHP reactor 1 is greater than 2 ppm, it indicates that the catalyst may have failed or its performance has deteriorated. The information is then transmitted to the PLC controller, and the SHP reactor 1 is cut out for hot hydrogen stripping to ensure timely catalyst regeneration and performance maintenance.
[0026] like Figure 1-Figure 4 As shown, a flow pipe 12 is connected and fixed to the rear side of the outer wall of the SHP reactor 1, a third valve 13 is arranged inside the flow pipe 12, and the third valve 13 is electrically connected to the PLC controller. A connecting hole 14 is opened on the right side of the outer wall of the SHP reactor 1, and a strain gauge pressure sensor 15 is fixed inside the connecting hole 14.
[0027] In use, during the hot hydrogen stripping, in order to avoid interrupting the production process, the liquid phase product can be temporarily introduced directly into the separation device 2 through the circulation pipe 12, which not only ensures the continuity of production, but also realizes the regeneration of the catalyst. The strain gauge pressure sensor 15 can accurately reflect the pressure change in the SHP reactor 1 in real time, which helps to timely discover and handle abnormal situations and ensure the safe and stable operation of the system.
[0028] like Figure 1-Figure 4 As shown, a mounting hole 16 is provided on the top surface of the SHP reactor 1, an infrared temperature sensor 17 is fixed inside the mounting hole 16, and a receiving hole 18 is provided on the top surface of the delivery pipe 3, a mass flow meter 19 is fixed inside the receiving hole 18.
[0029] In use, the infrared temperature sensor 17 is used to detect the temperature inside the SHP reactor 1, which helps to maintain a suitable operating temperature inside the SHP reactor 1. Through continuous monitoring, the reaction conditions can be adjusted in time to ensure that the SHP reactor 1 operates at an optimal temperature, thereby improving product quality and yield. The mass flow meter 19 is used to monitor the quality of hydrogen inside the delivery pipe 3, thereby providing accurate flow data, further improving reaction efficiency, and reducing raw material consumption.
[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A device for removing methylacetylene and propadiene, comprising a SHP reactor (1), wherein the SHP reactor (1) is arranged on the right side of the outer wall of a separation device (2), characterized in that: A delivery pipe (3) is connected and fixed between the SHP reactor (1) and the separation device (2), a PLC controller is fixed on the front side of the separation device (2), the SHP reactor (1) is electrically connected to the PLC controller, a palladium hydrogenation catalyst (4) is arranged inside the SHP reactor (1), a connecting pipe (5) is connected and fixed on the right side of the outer wall of the SHP reactor (1), a first valve (6) is arranged inside the delivery pipe (3), a PSA device (7) is arranged on the front side of the outer wall of the SHP reactor (1), the PSA device (7) is electrically connected to the PLC controller, a mounting pipe (8) is connected and fixed between the PSA device (7) and the SHP reactor (1), a second valve (9) is arranged inside the mounting pipe (8), and the second valve (9) is electrically connected to the PLC controller.
2. The device for removing methylacetylene and propadiene according to claim 1, characterized in that: A fixing hole (10) is provided on the top surface of the delivery pipe (3), an electrochemical sensor (11) is fixed inside the fixing hole (10), and the electrochemical sensor (11) is electrically connected to a PLC controller.
3. A device for removing methylacetylene and propadiene according to claim 2, characterized in that: A flow pipe (12) is connected and fixed to the rear side of the outer wall of the SHP reactor (1), a third valve (13) is arranged inside the flow pipe (12), and the third valve (13) is electrically connected to the PLC controller.
4. The device for removing methylacetylene and propadiene according to claim 1, characterized in that: A connection hole (14) is provided on the right side of the outer wall of the SHP reactor (1), and a strain gauge pressure sensor (15) is fixed inside the connection hole (14).
5. A device for removing methylacetylene and propadiene according to claim 4, characterized in that: The top surface of the SHP reactor (1) is provided with a mounting hole (16), and an infrared temperature sensor (17) is fixed inside the mounting hole (16).
6. A device for removing methylacetylene and propadiene according to claim 5, characterized in that: The top surface of the delivery pipe (3) is provided with a receiving hole (18), and a mass flow meter (19) is fixed inside the receiving hole (18).