Preparation of a fluidized bed hydrogenation unit for bio-jet fuel

Abstract

This utility model relates to a fluidized bed hydrogenation device for preparing bio-jet kerosene, belonging to the field of bio-jet kerosene preparation technology. It includes a base, with a heating furnace fixedly installed on the top of the base. The beneficial effect of this utility model is that when gas-liquid separator a is operating normally, but internal components of gas-liquid separator b need replacement, the two rotating rods can be rotated via a drive assembly. At this time, the butterfly valve plate near gas-liquid separator a is perpendicular to or open, while the butterfly valve plate near gas-liquid separator b is parallel or closed. This causes the incoming material to be input through the connecting pipe near gas-liquid separator a. This alternation method allows the entire bio-jet kerosene production unit to be shut down without needing to be shut down when maintaining gas-liquid separator a or gas-liquid separator b, thereby improving the production efficiency of jet kerosene.

Description

Technical Field

[0001] This utility model relates to the field of biofuel preparation technology, and in particular to a fluidized bed hydrogenation device for biofuel preparation. Background Technology

[0002] Bio-jet fuel, as a renewable aviation fuel, has advantages such as reducing carbon emissions and decreasing dependence on fossil fuels, which aligns with the global trend of green development in the aviation industry. With the advancement of international aviation carbon reduction policies, the market demand for bio-jet fuel continues to grow. In the production process of bio-jet fuel, fluidized bed hydrogenation technology is an important hydrogenation treatment technology. This technology uses the action of catalysts to hydrogenate biomass feedstocks under high temperature and high pressure, improving their properties (such as reducing viscosity and improving thermal stability), making them more suitable as aviation kerosene. A search revealed a Chinese patent (authorization announcement number CN220887412U) disclosing a fluidized bed hydrogenation device for preparing bio-jet fuel. This device includes a heating furnace, a fresh hydrogen compressor, a hydrogen dissolver, a gas-liquid separator, a fluidized bed hydrogenation reactor, a catalyst storage tank, a high-pressure separator, a low-pressure separator, a distillation column, a circulating hydrogen purifier, and a circulating hydrogen compressor. The fluidized bed hydrogenation reactor has a catalyst inlet, an exhaust outlet, and a liquid outlet at the top, and a material inlet and a catalyst outlet at the bottom. An internal three-phase separation component is also present. The bottom of the catalyst inlet is higher than the bottom of the exhaust outlet. This patented technology improves catalyst utilization, enhances the hydrogenation reaction effect, and increases the stability of the device's operation.

[0003] However, the above-mentioned device still has some drawbacks in actual use. The most obvious one is that in the above-mentioned bio-jet fuel preparation process, the gas-liquid separator plays a key role in the entire production process. However, its internal components, such as filter elements, baffles, and spiral blades, will wear down due to the scouring of particles carried by high-speed fluid, the erosion of corrosive media, and frequent gas-liquid separation operations. In order to ensure the separation effect of the gas-liquid separator, these worn internal components need to be replaced regularly. However, when replacing the internal components, it is often necessary to shut down the entire bio-jet fuel production unit, resulting in production interruption. Frequent shutdowns not only reduce the production efficiency of bio-jet fuel and increase production costs, but may also affect the timely completion of the production plan. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the main objective of this utility model is to provide a fluidized bed hydrogenation device for preparing bio-jet fuel.

[0005] The technical solution of this utility model is as follows: A fluidized bed hydrogenation device for preparing bio-jet fuel includes a base, a heating furnace fixedly installed on the top of the base, and supports fixedly installed on the top of the base and on one side of the heating furnace. A gas-liquid separator b is fixedly installed on the top of one support, and a gas-liquid separator a is fixedly installed on the top of the other support. A separating tank is provided on the outside of the heating furnace. Connecting pipes are fixedly connected to both sides of the separating tank. The ends of the connecting pipes away from the separating tank extend into the interior of gas-liquid separator b and gas-liquid separator a. A butterfly valve plate is rotatably installed inside the connecting pipe. Rotating rods are rotatably installed at both ends inside the separating tank. The bottom of the rotating rods extends into the interior of the connecting pipe and is fixedly connected to the corresponding butterfly valve plate. The two butterfly valve plates are arranged vertically.

[0006] By adopting the above technical solution, the two rotating rods are driven by the drive component to rotate. At this time, the butterfly valve plate near the gas-liquid separator a is in a perpendicular state or in an open state with the gas-liquid separator a, while the butterfly valve plate near the gas-liquid separator b is in a parallel state or in a closed state with the gas-liquid separator b. As a result, the material being transported will be input through the connecting pipe near the gas-liquid separator a.

[0007] In a preferred embodiment, a drive assembly is provided on the top of the dispensing tank. The drive assembly includes fixed blocks that are fixedly connected to both ends of the top of the dispensing tank, and a worm gear is rotatably installed between the two fixed blocks.

[0008] By adopting the above technical solution, the rotation of the worm gear can drive the worm wheel to rotate, which in turn drives the rotating rod to rotate, thereby achieving the purpose of flexibly adjusting the opening of the butterfly valve plate.

[0009] In a preferred embodiment, each of the rotating rods is fixedly connected to a worm gear at its top, and the worm gears are meshed with the worm. Each of the butterfly valve plates is fixedly connected to a fluororubber stationary ring at its edge.

[0010] By adopting the above technical solution and setting the fluororubber stationary ring, a reliable sealing structure can be formed, which can effectively prevent the leakage of hydrogen and materials under high temperature and high pressure, and avoid raw material waste and safety hazards.

[0011] In a preferred embodiment, a drive motor is fixedly installed on the outside of the separator, the output shaft of the drive motor is fixedly connected to the worm gear, and the fluororubber stationary rings are all in contact with the inner wall of the connecting pipe.

[0012] By adopting the above technical solution, the rotation of the output shaft of the drive motor can drive the worm gear to rotate, thereby realizing the transmission of power.

[0013] In a preferred embodiment, the top of the base is provided with a disassembly assembly, which includes a fixed pipe fixedly connected to the outside of the heating furnace. A connecting flange b is provided between the fixed pipe and the dispensing tank, and the fixed pipe and the dispensing tank are connected by the connecting flange b.

[0014] By adopting the above technical solution and setting up connecting flange b and connecting flange a, rapid assembly and disassembly can be achieved between the fluidized bed hydrogenation reactor, the gas-liquid separator and the liquid separator.

[0015] In a preferred embodiment, a fluidized bed hydrogenation reactor is fixedly installed on the top of the base, and each gas-liquid separator a is fixedly connected to a liquid outlet pipe on the side near the fluidized bed hydrogenation reactor. Each liquid outlet pipe is fixedly installed with a solenoid valve.

[0016] By adopting the above technical solution and setting up solenoid valves, gas-liquid separator b and gas-liquid separator a can work alternately.

[0017] In a preferred embodiment, the two outlet pipes are joined together at one end, and a connecting flange a is provided between the input end of the fluidized bed hydrogenation reactor and the outlet pipe. The outlet pipe is connected to the input end of the fluidized bed hydrogenation reactor via the connecting flange a.

[0018] By adopting the above technical solution and setting the connecting flange a, it is convenient to disassemble the gas-liquid separator and the fluidized bed hydrogenation reactor.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, when gas-liquid separator a is operating normally, but the internal components of gas-liquid separator b need to be replaced, the two rotating rods can be driven to rotate by the drive component. At this time, the butterfly valve plate on the side closer to gas-liquid separator a is in a perpendicular state or an open state, while the butterfly valve plate on the side closer to gas-liquid separator b is in a parallel state or a closed state. As a result, the material being transported will be input through the connecting pipe on the side closer to gas-liquid separator a. This alternation method allows the entire bio-jet fuel production device to be shut down when maintaining gas-liquid separator a or gas-liquid separator b, thereby improving the production efficiency of jet fuel.

[0020] 2. In this utility model, the setting of the fluororubber stationary ring can form a reliable sealing structure, effectively preventing the leakage of hydrogen and materials under high temperature and high pressure, avoiding raw material waste and safety hazards, and providing a guarantee for the stable progress of the fluidized bed hydrogenation reaction. Attached Figure Description

[0021] Figure 1This utility model provides an overall perspective view of a fluidized bed hydrogenation device for preparing bio-jet fuel; Figure 2 This utility model provides a half-sectional view of the separatory tank of a fluidized bed hydrogenation device for preparing bio-jet fuel; Figure 3 A side view of a fluidized bed hydrogenation apparatus for preparing bio-jet fuel is provided in this utility model. Figure 4 This invention provides a partial schematic diagram of a fluidized bed hydrogenation device for preparing bio-jet fuel.

[0022] Legend: 1. Base; 2. Support; 3. Gas-liquid separator a; 4. Gas-liquid separator b; 5. Liquid outlet pipe; 6. Connecting flange a; 7. Fluidized bed hydrogenation reactor; 8. Connecting pipe; 9. Separating tank; 10. Rotating rod; 11. Drive motor; 12. Worm gear; 13. Worm wheel; 14. Butterfly valve plate; 15. Heating furnace; 16. Fixing block; 17. Connecting flange b; 18. Fluororubber stationary ring. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] Reference Figure 1-4A fluidized bed hydrogenation device for preparing bio-jet fuel includes a base 1, a heating furnace 15 fixedly mounted on the top of the base 1, and supports 2 fixedly mounted on the top of the base 1 and on one side of the heating furnace 15. A gas-liquid separator b4 is fixedly mounted on the top of one support 2, and a gas-liquid separator a3 is fixedly mounted on the top of the other support 2. A separating tank 9 is arranged outside the heating furnace 15, and connecting pipes 8 are fixedly connected to both sides of the separating tank 9. The ends of the connecting pipes 8 away from the separating tank 9 extend into the interiors of the gas-liquid separators b4 and a3. Butterfly valve plates 14 are rotatably mounted inside the connecting pipes 8. Rotating rods 10 are rotatably mounted at both ends inside the separating tank 9, with the bottoms of the rotating rods 10 extending into the interiors of the connecting pipes 8 and corresponding to the butterfly valve plates 14. The two butterfly valve plates 14 are fixedly connected and vertically arranged. When the gas-liquid separator a3 is operating normally, but the internal components of the gas-liquid separator b4 need to be replaced, the two rotating rods 10 can be rotated by the drive component. At this time, the butterfly valve plate 14 on the side closer to the gas-liquid separator a3 is in a vertical state or an open state, while the butterfly valve plate 14 on the side closer to the gas-liquid separator b4 is in a parallel state or a closed state. As a result, the material being transported will be input through the connecting pipe 8 on the side closer to the gas-liquid separator a3. This alternation method allows the entire bio-jet fuel production unit to be shut down when maintaining the gas-liquid separator a3 or gas-liquid separator b4, thereby improving the production efficiency of jet fuel.

[0025] Specifically, a drive assembly is provided on the top of the separatory tank 9. The drive assembly includes fixed blocks 16 fixedly connected to both ends of the top of the separatory tank 9. The rotation of the worm gear 12 drives the worm wheel 13 to rotate, which in turn drives the rotating rod 10 to rotate, thereby achieving the purpose of flexibly adjusting the opening of the butterfly valve plate 14. The worm gear 12 is rotatably installed between the two fixed blocks 16. The top of each rotating rod 10 is fixedly connected to the worm wheel 13, which meshes with the worm gear 12. Fluororubber stationary rings 1 are fixedly connected to the edges of the butterfly valve plate 14. 8. The fluororubber stationary ring 18 forms a reliable sealing structure, effectively preventing the leakage of hydrogen and materials under high temperature and high pressure, avoiding raw material waste and safety hazards, and ensuring the stable operation of the fluidized bed hydrogenation reaction. A drive motor 11 is fixedly installed on the outside of the separatory tank 9. The output shaft of the drive motor 11 is fixedly connected to the worm gear 12. The rotation of the output shaft of the drive motor 11 can drive the worm gear 12 to rotate, thereby realizing the transmission of power. The fluororubber stationary ring 18 is in contact with the inner wall of the connecting pipe 8.

[0026] Specifically, a disassembly assembly is provided on the top of the base 1. The disassembly assembly includes a fixed pipe that is fixedly connected to the outside of the heating furnace 15. A connecting flange b17 is provided between the fixed pipe and the dispensing tank 9. The fixed pipe and the dispensing tank 9 are connected through the connecting flange b17, and the connecting flange b17 is connected to the connecting flange a6. The configuration allows for quick assembly and disassembly of the fluidized bed hydrogenation reactor 7, gas-liquid separator, and separator tank 9. The fluidized bed hydrogenation reactor 7 is fixedly installed on the top of the base 1. Each gas-liquid separator a3 has an outlet pipe 5 fixedly connected to the side closest to the fluidized bed hydrogenation reactor 7, facilitating the sequential entry of the hydrogen-dissolved liquid phase into the fluidized bed hydrogenation reactor 7. Solenoid valves are fixedly installed inside each outlet pipe 5 to allow for alternating operation with gas-liquid separator b4 and gas-liquid separator a3. The two outlet pipes 5 are connected at one end to form a single pipe. A connecting flange a6 is provided between the input end of the fluidized bed hydrogenation reactor 7 and the outlet pipe 5. The connecting flange a6 facilitates the disassembly of the gas-liquid separator and the fluidized bed hydrogenation reactor 7. The outlet pipe 5 is connected to the input end of the fluidized bed hydrogenation reactor 7 via the connecting flange a6.

[0027] Working principle: First, the raw material enters the heating furnace 15 for heating and is mixed with hydrogen. The mixture then enters the gas-liquid separator. When gas-liquid separator a3 is operating normally, but internal components of gas-liquid separator b4 need replacement, the operator can control the drive motor 11 via an external controller to start, which in turn drives the worm gear 12 to rotate. This, in turn, drives the worm wheel 13 to rotate, and simultaneously drives the rotating rod 10 to rotate. This allows for flexible adjustment of the butterfly valve plate 14's opening. At this time, the butterfly valve plate 14 near gas-liquid separator a3 is either perpendicular to or open, while the butterfly valve plate 14 near gas-liquid separator b4 is in contact with the gas-liquid separator. When separator b4 is in a parallel or closed state, the incoming material is fed in through the connecting pipe 8 near the gas-liquid separator a3. At the same time, the solenoid valve near gas-liquid separator b4 is closed, while the solenoid valve near gas-liquid separator a3 is opened. Then, the liquid phase containing dissolved hydrogen from gas-liquid separator a3 enters the fluidized bed hydrogenation reactor 7 sequentially, allowing subsequent production steps to continue. This alternation method eliminates the need to shut down the entire bio-jet fuel production unit when maintaining gas-liquid separator a3 or gas-liquid separator b4, thereby improving the production efficiency of jet fuel.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fluidized bed hydrogenation apparatus for preparing bio-jet fuel, comprising a base (1), characterized in that: A heating furnace (15) is fixedly installed on the top of the base (1). A bracket (2) is fixedly installed on the top of the base (1) and on one side of the heating furnace (15). A gas-liquid separator b (4) is fixedly installed on the top of one of the brackets (2), and a gas-liquid separator a (3) is fixedly installed on the top of the other bracket (2). A liquid separator tank (9) is provided on the outside of the heating furnace (15). A connecting pipe (8) is fixedly connected to both sides of the liquid separator tank (9). The end of the connecting pipe (8) away from the liquid separator tank (9) extends into the interior of the gas-liquid separator b (4) and the gas-liquid separator a (3). A butterfly valve plate (14) is rotatably installed inside the connecting pipe (8). A rotating rod (10) is rotatably installed at both ends inside the liquid separator tank (9). The bottom of the rotating rod (10) extends into the interior of the connecting pipe (8) and is fixedly connected to the corresponding butterfly valve plate (14). The two butterfly valve plates (14) are arranged vertically.

2. The fluidized bed hydrogenation apparatus for preparing bio-jet fuel according to claim 1, characterized in that: The top of the dispensing tank (9) is provided with a driving assembly, which includes fixed blocks (16) fixedly connected to both ends of the top of the dispensing tank (9), and a worm gear (12) is rotatably installed between the two fixed blocks (16).

3. The fluidized bed hydrogenation apparatus for preparing bio-jet fuel according to claim 2, characterized in that: The top of each rotating rod (10) is fixedly connected to a worm gear (13), and the worm gear (13) is meshed with the worm (12). The edge of each butterfly valve plate (14) is fixedly connected to a fluororubber stationary ring (18).

4. The fluidized bed hydrogenation apparatus for preparing bio-jet fuel according to claim 3, characterized in that: A drive motor (11) is fixedly installed on the outside of the liquid separator (9). The output shaft of the drive motor (11) is fixedly connected to the worm gear (12). The fluororubber stationary rings (18) are all in contact with the inner wall of the connecting pipe (8).

5. The fluidized bed hydrogenation apparatus for preparing bio-jet fuel according to claim 1, characterized in that: The base (1) is provided with a disassembly assembly on its top. The disassembly assembly includes a fixed pipe that is fixedly connected to the outside of the heating furnace (15). A connecting flange b (17) is provided between the fixed pipe and the liquid separator (9). The fixed pipe and the liquid separator (9) are connected by the connecting flange b (17).

6. The fluidized bed hydrogenation apparatus for preparing bio-jet fuel according to claim 1, characterized in that: The top of the base (1) is fixedly installed with a fluidized bed hydrogenation reactor (7), and the gas-liquid separator a (3) is fixedly connected to a liquid outlet pipe (5) on the side near the fluidized bed hydrogenation reactor (7). The inside of the liquid outlet pipe (5) is fixedly installed with a solenoid valve.

7. The fluidized bed hydrogenation apparatus for preparing bio-jet fuel according to claim 6, characterized in that: The two outlet pipes (5) are connected at one end to form a single pipe. A connecting flange a (6) is provided between the input end of the fluidized bed hydrogenation reactor (7) and the outlet pipe (5). The outlet pipe (5) and the input end of the fluidized bed hydrogenation reactor (7) are connected by the connecting flange a (6).

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