A gas-liquid distribution mixer and a multi-row tube fixed bed reactor
By designing a gas-liquid distribution mixer in a multi-line tube fixed bed reactor, the problem of low hydrogenation yield caused by disordered flow of hydrogen and organic liquids is solved, and a more efficient hydrogenation reaction effect is achieved.
Patent Information
- Application Number
- CN202421553131.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-03
AI Technical Summary
In existing multi-line fixed bed reactors, the flow states of hydrogen and organic liquids are disordered, resulting in low hydrogenation yields.
A gas-liquid distribution mixer is designed, and by setting a gas chamber, a liquid chamber and a gas-liquid mixing tube in the reactor, the gas and liquid are fully mixed in the mixing tube before entering the column tube for reaction, thereby improving the hydrogenation yield.
Through the design of the gas-liquid distribution mixer, the gas and liquid are fully mixed before entering the column tube, which significantly improves the hydrogenation yield. At the same time, the design is simple, low-cost, and easy to process and use.
Smart Images
Figure CN222739006U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of organic liquid hydrogen storage, in particular to a gas-liquid distribution mixer and a multi-row tube fixed bed reactor. Background Art
[0002] Organic liquid hydrogen storage is a new type of hydrogen storage technology. Compared with traditional high-pressure hydrogen storage and liquid hydrogen storage technology, it has the advantages of higher energy density, greater safety and reliability, and easier storage and transportation. In the hydrogenation process of organic liquid carriers, hydrogenation catalysts are required, and the process must be carried out at higher temperatures and hydrogen pressures, which places certain requirements on the reactor. In order to be able to mass-produce hydrogen-containing organic liquids, the organic liquid carrier must flow continuously in the reactor and continuously react with hydrogen under the action of the hydrogenation catalyst. At the same time, the organic liquid carrier should have sufficient residence time in the reactor to ensure that the organic liquid carrier has a good hydrogenation yield.
[0003] At present, due to the increase in production capacity and the increase in catalyst loading, the mainstream single-tube fixed-bed reactor can no longer meet the demand. In order to better balance the hydrogen absorption capacity and structural cost, a multi-tube fixed-bed reactor is generally used, that is, multiple tubes are integrated in the same reactor. However, the flow state of hydrogen and organic liquid carriers in the multiple tubes is disordered and chaotic, and they cannot fully react under the action of the hydrogenation catalyst, resulting in low overall hydrogenation yield. Utility Model Content
[0004] The embodiments of the utility model provide a gas-liquid distribution mixer and a multi-row tube fixed bed reactor, which can improve the technical problem of low hydrogenation yield in the existing multi-row tube fixed bed reactor.
[0005] In a first aspect, an embodiment of the utility model provides a gas-liquid distribution mixer, which is applied to a multi-tube fixed bed reactor, wherein the multi-tube fixed bed reactor comprises a shell and a plurality of tubes arranged in the shell, wherein an air inlet pipe and a liquid inlet pipe are arranged on the shell, and the gas-liquid distribution mixer comprises:
[0006] A tube sheet, sleeved on the inlet end of the tube array and clamped in the shell;
[0007] A sealing plate is arranged on a side of the tube sheet away from the tube array and is clamped in the shell. A gas cavity is defined between the side of the sealing plate away from the tube sheet and the shell. The gas cavity is communicated with the air inlet pipe. An air outlet is arranged on the sealing plate. A liquid cavity is defined between the sealing plate, the tube sheet and the shell. The liquid cavity is communicated with the liquid inlet pipe.
[0008] The gas-liquid mixing tube is arranged between the sealing plate and the tube plate, and the two ends of the gas-liquid mixing tube are respectively connected with the gas outlet and the inlet of the tube array, the gas-liquid mixing tube is arranged in the liquid cavity, and the gas-liquid mixing tube is provided with a liquid inlet.
[0009] Beneficial effects of the embodiments of the utility model: the utility model provides a gas cavity, a liquid cavity and a gas-liquid mixing tube before the gas and liquid enter the tube array, so that the gas and liquid are fully mixed in the gas-liquid mixing tube and then enter the tube array for reaction, thereby effectively improving the hydrogenation yield. At the same time, the gas-liquid distribution mixer has a simple structure, low cost, easy processing, assembly and use, and does not require secondary maintenance after installation.
[0010] In one embodiment, a gas distribution pipe is provided on the sealing plate, the gas distribution pipe is provided in the gas cavity, and the outlet end of the gas distribution pipe is clamped in the gas outlet hole.
[0011] Beneficial effects of the embodiments of the utility model: by providing a gas distribution pipe, the gas can be evenly distributed to different tube arrays, thereby improving the hydrogenation yield.
[0012] In one embodiment, a plurality of the gas-liquid mixing tubes are provided, and the gas-liquid mixing tubes correspond one-to-one to the tube arrays. A plurality of the gas distribution tubes are provided, and the gas distribution tubes correspond one-to-one to the tube arrays.
[0013] The beneficial effects of the embodiments of the utility model are as follows: by making the gas-liquid mixing tubes and the gas distribution tubes correspond to the tube arrays one by one, the liquid and the gas can be evenly distributed to different gas-liquid mixing tubes and tube arrays, thereby improving the hydrogenation yield.
[0014] In one embodiment, a one-way valve is provided on the gas distribution pipe.
[0015] Beneficial effects of the embodiments of the utility model: by arranging a one-way valve on the gas distribution pipe, it is possible to prevent liquid from flowing back into the gas cavity, thereby affecting the gas distribution.
[0016] In one embodiment, the end of the gas-liquid mixing tube close to the tube array is inserted into the inlet of the tube array, the end of the gas-liquid mixing tube away from the tube array is abutted against the sealing plate, and the gas outlet is arranged opposite to the end of the gas-liquid mixing tube away from the tube array.
[0017] The beneficial effects of the embodiments of the utility model are as follows: by inserting the end of the gas-liquid mixing tube close to the array tube into the inlet of the array tube, the gas and liquid in the gas-liquid mixing tube can be effectively transported into the array tube, and the end of the gas-liquid mixing tube close to the array tube can be fixed. By contacting the end of the gas-liquid mixing tube away from the array tube with the sealing plate, the end of the gas-liquid mixing tube away from the array tube can be fixed.
[0018] In a second aspect, an embodiment of the present utility model provides a multi-row tube fixed bed reactor, comprising:
[0019] A shell, wherein a plurality of tubes are arranged in the shell, and an air inlet pipe and a liquid inlet pipe are arranged on the shell;
[0020] The gas-liquid distributing mixer is arranged in the shell.
[0021] In one embodiment, a filter support net is further included, and the filter support net is arranged at the outlet end of the array of tubes and is clamped in the shell.
[0022] The beneficial effects of the embodiments of the utility model are as follows: by providing a filter support net, support can be provided for the catalyst loaded in the tubes, while blocking the catalyst particles.
[0023] In one embodiment, an outlet gas-liquid mixing chamber is defined between an end of the filter support mesh facing away from the array of tubes and the shell.
[0024] In one embodiment, it further includes a gas-liquid outlet, the gas inlet pipe and the liquid inlet pipe are arranged on the top of the shell, the gas-liquid outlet is arranged at the bottom of the shell, and the gas-liquid outlet is communicated with the outlet gas-liquid mixing chamber.
[0025] In one embodiment, a heat transfer oil inlet and a heat transfer oil outlet are further provided on the shell, and a tube array accommodating cavity is defined between the side of the tube plate away from the liquid cavity and the shell, and the heat transfer oil inlet and the heat transfer oil outlet are in communication with the tube array accommodating cavity.
[0026] Beneficial effects of the embodiments of the utility model: the heat transfer oil inlet and the heat transfer oil outlet are used to feed and discharge the heat transfer oil into the tube array accommodating cavity, so as to control the temperature of the reaction in the tube array. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 It is a structural schematic diagram of a gas-liquid distribution mixer provided in an embodiment of the utility model (the tube sheet 1 is not shown);
[0029] Figure 2 is a side view of a gas-liquid distributing mixer provided by an embodiment of the utility model (the tube sheet 1 is not shown);
[0030] Figure 3 It is a cross-sectional view of a multi-row tube fixed bed reactor provided in an embodiment of the utility model.
[0031] Description of the drawings: tube sheet-1, gas cavity-2, gas distribution pipe-3, one-way valve-4, sealing plate-5, liquid cavity-6, gas-liquid mixing tube-7, liquid inlet hole-8, shell-9, tube array-10, air inlet pipe-11, liquid inlet pipe-12, gas-liquid outlet-13, filter support net-14, outlet gas-liquid mixing cavity-15, tube array accommodating cavity-16, heat transfer oil inlet-17, heat transfer oil outlet-18. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.
[0033] See also Figures 1 to 3 The embodiment of the present application provides a gas-liquid distribution mixer, which is applied to a multi-row tube fixed bed reactor. The multi-row tube fixed bed reactor includes a shell 9 and a plurality of tubes 10 arranged in the shell 9, and the shell 9 is provided with an air inlet pipe 11 and a liquid inlet pipe 12. The gas-liquid distribution mixer includes a tube sheet 1, a sealing plate 5 and a gas-liquid mixing pipe 7. The tube sheet 1 and the sealing plate 5 are sequentially arranged in the shell 9.
[0034] The tube sheet 1 is sleeved on the inlet end of the tube array 10 and clamped in the shell 9, and the tube sheet 1 is fixedly connected to the shell 9. The sealing plate 5, the tube sheet 1 and the shell 9 together define a liquid cavity 6, and the outlet of the liquid inlet pipe 12 is arranged in the liquid cavity 6 to transport liquid into the liquid cavity 6. The liquid inlet pipe 12 is connected to a liquid pump.
[0035] The sealing plate 5 is arranged on the side of the tube sheet 1 away from the tube array 10, and is clamped in the shell 9. A sealing ring is arranged between the sealing plate 5 and the shell 9, and they are fixedly connected. The side of the sealing plate 5 away from the tube sheet 1 and the shell 9 together define a gas cavity 2. The outlet of the air inlet pipe 11 is arranged in the gas cavity 2 to transport gas into the gas cavity 2. The sealing plate 5 is provided with a gas outlet hole to transport gas to the gas-liquid mixing pipe 7. The sealing plate 5 is evenly provided with gas distribution pipes 3, which are arranged in the gas cavity 2, and the outlet end of the gas distribution pipe 3 is clamped in the gas outlet hole. A plurality of gas distribution pipes 3 are provided, and the gas distribution pipes 3 correspond to the tube array 10 one by one.
[0036] The gas-liquid mixing tube 7 is arranged between the sealing plate 5 and the tube plate 1, and is arranged in the liquid cavity 6. The gas-liquid mixing tube 7 is provided with a liquid inlet hole 8 to transport liquid from the liquid cavity 6 to the gas-liquid mixing tube 7. The two ends of the gas-liquid mixing tube 7 are respectively connected with the gas outlet hole and the inlet of the tube array 10. A plurality of gas-liquid mixing tubes 7 are provided, and the gas-liquid mixing tubes 7 correspond to the tube array 10 one by one. A one-way valve 4 is provided on the gas distribution pipe 3 to prevent the liquid from flowing back into the gas cavity 2. The end of the gas-liquid mixing tube 7 close to the tube array 10 is inserted into the inlet of the tube array 10, and the end of the gas-liquid mixing tube 7 away from the tube array 10 is abutted against the sealing plate 5, and the gas outlet hole is arranged opposite to the end of the gas-liquid mixing tube 7 away from the tube array 10.
[0037] See also Figures 1 to 3 The embodiment of the present application also provides a multi-tube fixed bed reactor, including a shell 9 and the above-mentioned gas-liquid distribution mixer. A plurality of tubes 10 are arranged in the shell 9, an air inlet pipe 11 and a liquid inlet pipe 12 are arranged at the top of the shell 9, a gas-liquid outlet 13 is arranged at the bottom of the shell 9, and the gas-liquid distribution mixer is arranged in the shell 9. A filter support net 14 is arranged at the outlet end of the tube 10, and the two are abutted against each other, and the filter support net 14 is clamped in the shell 9. The end of the filter support net 14 away from the tube 10 and the shell 9 jointly define an outlet gas-liquid mixing chamber 15. The gas-liquid outlet 13 is connected to the outlet gas-liquid mixing chamber 15.
[0038] The shell 9 is also provided with a heat transfer oil inlet 17 and a heat transfer oil outlet 18. The side of the tube sheet 1 facing away from the liquid chamber 6 and the shell 9 together define a tube array accommodating chamber 16. The heat transfer oil inlet 17 and the heat transfer oil outlet 18 are connected to the tube array accommodating chamber 16 to control the temperature of the tube array 10.
[0039] When the multi-tube fixed bed reactor of the present application is used for the organic liquid hydrogen storage reaction, the gas transported is high-pressure hydrogen, the liquid transported is an organic liquid, and the tubes 10 are filled with a hydrogenation catalyst. During the reaction, the hydrogen flow rate is faster than the liquid flow rate, and when the hydrogen enters the gas-liquid mixing tube 7, a differential pressure is formed with the liquid cavity 6, so that the hydrogen drives the organic liquid to form turbulence in the tubes 10, thereby enhancing the mixed flow of gas, liquid and catalyst, and further improving the efficiency of the hydrogenation reaction.
[0040] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for technicians in this field, according to the idea of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.
Claims
1. A gas-liquid distribution mixer, applied to a multi-tube fixed bed reactor, the multi-tube fixed bed reactor comprising a shell and a plurality of tubes arranged in the shell, the shell being provided with an air inlet pipe and a liquid inlet pipe, characterized in that: The gas-liquid distributing mixer comprises: A tube sheet, sleeved on the inlet end of the tube array and clamped in the shell; A sealing plate is arranged on a side of the tube sheet away from the tube array and is clamped in the shell. A gas cavity is defined between the side of the sealing plate away from the tube sheet and the shell. The gas cavity is communicated with the air inlet pipe. An air outlet is arranged on the sealing plate. A liquid cavity is defined between the sealing plate, the tube sheet and the shell. The liquid cavity is communicated with the liquid inlet pipe. The gas-liquid mixing tube is arranged between the sealing plate and the tube plate, and the two ends of the gas-liquid mixing tube are respectively connected with the gas outlet and the inlet of the tube array, the gas-liquid mixing tube is arranged in the liquid cavity, and the gas-liquid mixing tube is provided with a liquid inlet.
2. The gas-liquid distributing mixer according to claim 1, characterized in that: The sealing plate is provided with a gas distribution pipe, the gas distribution pipe is arranged in the gas cavity, and the outlet end of the gas distribution pipe is clamped in the gas outlet hole.
3. The gas-liquid distributing mixer according to claim 2, characterized in that: A plurality of the gas-liquid mixing tubes are provided, and the gas-liquid mixing tubes correspond one-to-one to the tube arrays. A plurality of the gas distribution tubes are provided, and the gas distribution tubes correspond one-to-one to the tube arrays.
4. The gas-liquid distributing mixer according to claim 2, characterized in that: A one-way valve is arranged on the gas distribution pipe.
5. The gas-liquid distributing mixer according to claim 1, characterized in that: The end of the gas-liquid mixing tube close to the tube array is inserted into the inlet of the tube array, the end of the gas-liquid mixing tube away from the tube array is abutted against the sealing plate, and the gas outlet is arranged opposite to the end of the gas-liquid mixing tube away from the tube array.
6. A multi-row tube fixed bed reactor, characterized in that: include: A shell, wherein a plurality of tubes are arranged in the shell, and an air inlet pipe and a liquid inlet pipe are arranged on the shell; The gas-liquid distributing mixer as described in any one of claims 1 to 5 is arranged in the shell.
7. The multi-row tube fixed bed reactor according to claim 6, characterized in that: It also includes a filter support net, which is arranged at the outlet end of the tube array and is clamped in the shell.
8. The multi-row tube fixed bed reactor according to claim 7, characterized in that: An outlet gas-liquid mixing chamber is defined between the end of the filter support net facing away from the tube array and the shell.
9. The multi-row tube fixed bed reactor according to claim 8, characterized in that: It also includes a gas-liquid outlet, the gas inlet pipe and the liquid inlet pipe are arranged on the top of the shell, the gas-liquid outlet is arranged at the bottom of the shell, and the gas-liquid outlet is communicated with the outlet gas-liquid mixing chamber.
10. The multi-row tube fixed bed reactor according to claim 6, characterized in that: The shell is also provided with a heat transfer oil inlet and a heat transfer oil outlet. The side of the tube sheet facing away from the liquid cavity and the shell together define a tube array accommodating cavity. The heat transfer oil inlet and the heat transfer oil outlet are in communication with the tube array accommodating cavity.