Production device and method for preparing biological aviation kerosene by hydrodeoxygenation method

Abstract

The invention discloses a production device and method for preparing biological aviation kerosene through a hydrodeoxygenation method, the production device for preparing the biological aviation kerosene through the hydrodeoxygenation method comprises a reaction kettle, a stirring assembly is arranged in the reaction kettle, and the stirring assembly is used for stirring a reaction mixture; the stirring assembly comprises a hollow square shaft, a plurality of hollow stirring blades and a driving assembly, and the hollow square shaft is rotationally arranged at the bottom in the reaction kettle; the invention further discloses a production method for preparing the biological aviation kerosene through the hydrodeoxygenation method. The production method comprises the steps of S1, raw material pretreatment; s2, hydrodeoxygenation reaction; s3, separating a product; and S4, rectification. According to the device, hydrogen exhausted from the exhaust holes is sprayed out in all directions, so that the contact area between the hydrogen and raw materials can be increased, the hydrogen reaction is more sufficient and complete, waste is reduced, and meanwhile, the preparation efficiency of the biological aviation kerosene is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical engineering, and in particular to a production device and a method for preparing bio-jet kerosene by a hydrodeoxygenation process. Background Art

[0002] With the rapid development of the global aviation industry, the demand for aviation kerosene continues to grow. At the same time, in order to cope with environmental pollution and energy crisis, it is imperative to seek sustainable alternative fuels. Bio-jet kerosene, as a green and renewable energy, has broad application prospects.

[0003] At present, for the method of preparing bio-jet fuel by hydrodeoxygenation, it mainly adds hydrogen to raw materials such as vegetable oil, animal fat or waste oil for hydrodeoxygenation reaction. During the processing, hydrogen can be introduced into the bottom of the reactor through a pipeline assembly so that the hydrogen can pass through the raw materials in the reactor during the rising process. Due to its own buoyancy, hydrogen tends to escape quickly in a straight line upward even if it is affected by stirring during the rising process, and cannot be deeply mixed with the raw materials at all levels for a long time. This leads to a limited contact area between hydrogen and the raw materials, and more hydrogen cannot react fully and completely with the raw materials in time, which not only causes waste, but also leads to low preparation efficiency of bio-jet fuel. In view of this, the present application proposes a production device and method for preparing bio-jet fuel by hydrodeoxygenation. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a production device and method for preparing bio-jet kerosene by a hydrodeoxygenation process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A production device for preparing bio-jet kerosene by a hydrodeoxygenation method, comprising a reactor, a stirring assembly is arranged in the reactor, the stirring assembly is used to stir the reaction mixture, the stirring assembly comprises a hollow square shaft, a plurality of hollow stirring blades and a driving assembly, the hollow square shaft is rotatably arranged at the bottom of the reactor, one end of each of the hollow stirring blades is fixedly connected to a rotating shaft, the other end of the hollow stirring blade is fixedly connected to a connecting pipe, and the end of the connecting pipe away from the hollow stirring blade is rotatably connected to a rotating joint, and one end of the connecting pipe is communicated with the inside of the hollow stirring blade, the other end of the connecting pipe is communicated with the rotating joint, and the rotating joint is rotatably arranged on the inner wall of the hollow square shaft and communicated with the inside of the hollow square shaft, and the side wall of the hollow stirring blade is provided with an exhaust hole; The driving assembly is used to drive the stirring assembly to rotate. The hollow square shaft is equipped with an aeration assembly, which is used to transport gas into the reactor. The reactor is also equipped with a rotating assembly, which is used to make each hollow stirring blade rotate.

[0006] Preferably, the rotating assembly includes a plurality of annular racks fixedly connected to the inner wall of the reactor, and a driving gear is fixedly connected to one end of the rotating shaft away from the hollow stirring blade, the driving gear is meshed with the annular rack, and the driving gear moves along the annular rack.

[0007] Preferably, the driving assembly includes a driving gear, a driven gear and a driving motor, the driven gear is fixedly connected to the hollow square shaft, the driving motor is fixedly installed on the upper end of the reactor, the output shaft of the driving motor is fixedly connected to the driving gear, and the driving gear is meshed with the driven gear.

[0008] Preferably, a plurality of air guide tubes are fixedly connected to the side wall of the hollow square shaft, and the air guide tubes are communicated with the interior of the hollow square shaft, and one end of the air guide tube away from the hollow square shaft is connected to an expansion and contraction ball.

[0009] Preferably, the gas filling assembly includes an air injection pipe, a telescopic tube, a tee, a slider, a reciprocating screw and a screw nut. The slider is slidably arranged in a hollow square shaft, the reciprocating screw is arranged inside the hollow square shaft, and the upper end of the reciprocating screw is fixedly connected to the top of the reactor. The screw nut and the reciprocating screw form a screw pair, and the screw nut is fixedly connected to the upper end of the slider. Two air guide grooves are provided on the side wall of the slider, and the two ends of the tee are respectively communicated with the two air guide grooves, the lower end of the tee is communicated with the telescopic tube, and the air injection pipe is communicated with the telescopic tube.

[0010] Preferably, the side wall of the sliding block is tightly fitted with the inner wall of the hollow square shaft.

[0011] Preferably, a plurality of sleeves are fixedly connected to the inner wall of the reactor, a driving rod is slidably provided in the sleeve, a toggle plate is fixedly connected to the driving rod, a disturbance rod is fixedly connected to the side wall of the toggle plate, and the driving rod is telescopically extended by a telescopic device.

[0012] Preferably, the telescopic device includes a spring, a turntable and a plurality of toggle blocks, one end of the spring is fixedly connected to the inner wall of the reactor, the other end of the spring is fixedly connected to the driving rod, the turntable is fixedly connected to the hollow square shaft, the circumferential side wall of the turntable is provided with an annular groove, a plurality of toggle blocks are fixedly distributed around the annular groove at equal intervals, the driving rod is rotatably connected to the end away from the spring, and the roller moves along the annular groove.

[0013] The present invention also discloses a production method for preparing bio-jet fuel by a hydrodeoxygenation method. The production device for preparing bio-jet fuel by a hydrodeoxygenation method is used, and the method comprises the following steps: S1. Raw material pretreatment: Select appropriate biomass raw materials, such as vegetable oil, animal fat or waste oil, and perform impurity removal and dehydration treatment on them to ensure the purity of the raw materials and avoid impurities affecting subsequent reactions; S2, hydrodeoxygenation reaction, the pretreated raw materials are fed into the reactor, and hydrogen is added into the reactor through the gas injection pipe in the gas adding component, and then the catalyst is added into the reactor, and the stirring component in the reactor is also started while starting the reactor, and the hydrodeoxygenation reaction is carried out under certain temperature and pressure conditions; S3, product separation: the product after the hydrodeoxygenation reaction enters the separation equipment, and the bio-jet fuel fraction is separated from the unreacted raw materials, hydrogen and other by-products by distillation, extraction and other methods; S4, distillation, the separated bio-jet fuel fraction is refined, and the hydrogenation refining process is used to further remove impurities such as sulfur and nitrogen, improve product quality, and make its various performance indicators meet the requirements of aviation kerosene standards.

[0014] Preferably, the hollow stirring blade is in a spiral twisted shape, and a one-way stop valve is installed in the connecting pipe.

[0015] The present invention has the following beneficial effects: 1. By providing a hollow stirring blade with an exhaust hole, when hydrogen is injected into the reactor through the aeration component, the hydrogen can be discharged through the exhaust hole on the side wall of the hollow stirring blade. At the same time, under the action of the rotating component, the hollow stirring blade will rotate while rotating with the hollow square shaft, so that the hydrogen discharged from the exhaust hole can be sprayed in all directions, which can increase and extend the contact area between hydrogen and raw materials, making the hydrogen reaction more complete, reducing waste and improving the preparation efficiency of bio-jet fuel; 2. By setting up a gas injection assembly consisting of a gas injection pipe, a telescopic pipe, a tee pipe, a slider, a reciprocating screw and a screw nut, the screw nut can rotate around the reciprocating screw and move up and down during the process of hydrogen injection into the gas injection assembly, and the screw nut can drive the slider to move up and down synchronously, so that hydrogen can be input into the hollow stirring blades at different heights, so that hydrogen can be discharged from different heights, so that hydrogen and raw materials can be mixed more fully and evenly, and the preparation efficiency of bio-jet fuel can be further improved; 3. By setting the expansion and contraction ball, when the slider moves up and down along the hollow square shaft, hydrogen can be injected into the expansion and contraction ball through each gas guide tube, causing the expansion and contraction ball to expand. When the slider leaves, the expansion and contraction ball contracts, and the hydrogen in the expansion and contraction ball is discharged back into the hollow square shaft. Whenever the expansion and contraction ball contracts, a "cavity" area can be formed near the ball. The liquid in the reactor quickly flows into this area under the action of pressure difference, forming a strong local convection, which can entrain the surrounding hydrogen bubbles, effectively prolong the residence time of hydrogen in the raw material, and promote the complete reaction of hydrogen; Whenever the ball expands, it will push out the raw material liquid and hydrogen gathered around it during the previous contraction stage, forming a flow field radiating outward, which makes the material flow more intense, further improves the mixing efficiency, and makes the gas-liquid mixing more uniform. 4. By setting up a telescopic device to drive the driving rod to extend and retract, the toggle plate on the upper side of the driving rod can be moved radially, so that the disturbance rod can continuously poke the floating hydrogen bubbles, and the hydrogen bubbles can be broken into a large number of small bubbles, further increasing the contact area between hydrogen and liquid raw materials, and promoting a full and complete reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the internal cross-sectional structure of a production device for preparing bio-jet kerosene by a hydrodeoxygenation method proposed in the present invention; Figure 2 It is a schematic diagram of the internal cross-section of the reactor and the connection structure of the annular rack in the present invention; Figure 3 for Figure 1 A schematic diagram of the structure enlargement at point A; Figure 4 It is a schematic diagram of the connection structure of the stirring assembly, the telescopic device, the air guide tube, the expansion and contraction ball and other components in the present invention; Figure 5 It is a schematic diagram of the internal cross-section of the hollow square shaft of the present invention and the connection structure of the air guide tube, the expansion and contraction ball, the hollow stirring blade, the aeration assembly and other components; Figure 6 It is a schematic diagram of the connection structure of the sleeve, the driving rod, the spring, the toggle plate and the disturbance rod in the present invention; Figure 7 for Figure 5 Schematic diagram of the enlarged structure at point B in FIG.

[0017] In the figure: 1 reactor, 2 driving motor, 3 hollow square shaft, 4 hollow stirring blade, 5 turntable, 6 air guide tube, 7 expansion and contraction ball, 8 annular rack, 9 sleeve, 10 toggle plate, 11 driven gear, 12 driving gear, 13 air injection tube, 14 reciprocating screw, 15 toggle block, 16 driving gear, 17 rotating shaft, 18 exhaust hole, 19 connecting pipe, 20 annular groove, 21 roller, 22 disturbance rod, 23 driving rod, 24 spring, 25 telescopic tube, 26 tee pipe, 27 screw nut, 28 slider, 29 through hole, 30 rotary joint, 31 air guide groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Embodiment 1: Reference Figure 1-5 as well as Figure 7 A production device for preparing bio-jet kerosene by hydrodeoxygenation method includes a reactor 1. It should be noted that the structure of the reactor 1 is basically the same as that of the existing chemical reactor. Raw materials and catalysts can be added into the reactor 1 through relevant feeding structures, and certain environmental parameters such as temperature and pressure can be set.

[0020] A stirring assembly is provided in the reactor 1, and the stirring assembly is used to stir the reaction mixture. The stirring assembly includes a hollow square shaft 3, a plurality of hollow stirring blades 4 and a driving assembly. The hollow square shaft 3 is rotatably arranged at the bottom of the reactor 1, one end of each hollow stirring blade 4 is fixedly connected to a rotating shaft 17, and the other end of the hollow stirring blade 4 is fixedly connected to a connecting pipe 19, and the end of the connecting pipe 19 away from the hollow stirring blade 4 is rotatably connected to a rotary joint 30, and one end of the connecting pipe 19 is communicated with the interior of the hollow stirring blade 4, and the other end of the connecting pipe 19 is communicated with the rotary joint 30, and the rotary joint 30 is rotatably arranged on the inner wall of the hollow square shaft 3 and communicated with the interior of the hollow square shaft 3, and the side wall of the hollow stirring blade is provided with an exhaust hole 18; specifically, by setting the rotary joint 30, the connecting pipe 19 can be communicated with the interior of the hollow square shaft 3, and the rotary joint 30 can also rotate freely to cooperate with the rotation of the hollow stirring blade 4.

[0021] The driving assembly is used to drive the stirring assembly to rotate. A gas adding assembly is installed on the hollow square shaft 3, and the gas adding assembly is used to transport gas into the reactor 1. A rotating assembly is also installed in the reactor 1, and the rotating assembly is used to make each hollow stirring blade 4 rotate.

[0022] The rotating assembly includes a plurality of annular racks 8 fixedly connected to the inner wall of the reactor 1 , and a driving gear 16 is fixedly connected to one end of the rotating shaft 17 away from the hollow stirring blade 4 , and the driving gear 16 meshes with the annular racks 8 and moves along the annular racks 8 .

[0023] The gas filling assembly includes an air injection pipe 13, a telescopic pipe 25, a tee pipe 26, a slider 28, a reciprocating screw 14 and a screw nut 27. The slider 28 is slidably arranged in the hollow square shaft 3. The reciprocating screw 14 is arranged inside the hollow square shaft 3, and the upper end of the reciprocating screw 14 is fixedly connected to the top of the reactor 1. The screw nut 27 and the reciprocating screw 14 form a screw pair. The screw nut 27 is fixedly connected to the upper end of the slider 28. The side wall of the slider 28 is provided with two air guide grooves 31. The two ends of the tee pipe 26 are respectively connected to the two air guide grooves 31. The lower end of the tee pipe 26 is connected to the telescopic pipe 25, and the air injection pipe 13 is connected to the telescopic pipe 25. By setting the telescopic pipe 25, the telescopic pipe 25 can be freely extended and retracted to match the up and down movement of the slider 28.

[0024] Furthermore, the telescopic tube 25 can also be connected to the gas injection tube 13 through a rotating joint, so that the hollow square shaft 3 can rotate freely without driving the gas injection tube 13 to rotate, and the gas injection tube 13 can also transport gas to the telescopic tube 25.

[0025] The side wall of the slider 28 fits tightly with the inner wall of the hollow square shaft 3. The hollow stirring blade 4 is in a spiral twisted shape. Specifically, when the spiral twisted hollow stirring blade 4 rotates with the hollow square shaft 3, it can increase the axial and radial flow effects of the raw materials in the reactor 1, so that the liquid in the reactor 1 forms an up-and-down circulation flow, avoiding the up-and-down stratification phenomenon, so that the materials in the entire reactor 1 can be fully mixed and reacted, and a certain radial flow component will be generated, so that the liquid flows from the vicinity of the stirring shaft toward the reactor wall, and then returns along the wall to form a radial circulation. This radial flow and axial flow are intertwined to form a complex flow field, which greatly improves the mixing effect.

[0026] A one-way stop valve is installed in the connecting pipe 19. It should be noted that by arranging the one-way stop valve in the connecting pipe 19, the hydrogen gas input into the connecting pipe 19 can be prevented from flowing back, and the liquid raw material in the reactor 1 can also be prevented from flowing into the hollow square shaft 3 through the connecting pipe 19.

[0027] In this embodiment, after the liquid raw material and the catalyst are put into the reactor 1, the reactor 1 is started, and the driving motor 2 is started to drive the driving gear 12 to rotate, and thereby drive the driven gear 11 to rotate, then the driven gear 11 will drive the hollow square shaft 3 to rotate, and the hollow square shaft 3 can drive each hollow stirring blade 4 to rotate together to stir the reactants.

[0028] At this time, hydrogen can be injected through the gas injection pipe 13, and the hydrogen is input into the telescopic pipe 25 through the gas injection pipe 13 and flows into the three-way pipe 26. When the hollow square shaft 3 rotates, Figure 7 , which will drive the internal slider 28 to rotate together, and the slider 28 will drive the screw nut 27 on its upper side to rotate synchronously, while the reciprocating screw 14 inside it is fixed at the top of the reactor 1, so the reciprocating screw 14 does not rotate, and when the screw nut 27 rotates, it will reciprocate up and down around the reciprocating screw 14, and the screw nut 27 will drive the slider 28 to reciprocate up and down; During the up and down reciprocating movement of the slider 28, the air guide grooves 31 on both sides thereof will be connected with each rotary joint 30 in turn. Whenever the air guide grooves 31 are connected with a rotary joint 30, the hydrogen flowing into the three-way pipe 26 will flow into the rotary joint 30 through the air guide grooves 31, and flow into the interior of the hollow stirring blade 4 through the rotary joint 30 and the connecting pipe 19, and finally be discharged from the exhaust holes 18 on the surface of the hollow stirring blade 4, and mix with the liquid raw material in the reactor 1 to react.

[0029] When the hollow square shaft 3 rotates, the hollow stirring blades 4 on both sides thereof will be driven to rotate together. At this time, the driving gear 16 on the outer side of the hollow stirring blade 4 will move along the annular rack 8 on the inner wall of the reactor 1, and the driving gear 16 will rotate on its own. The driving gear 16 will also drive the hollow stirring blade 4 to rotate through the rotating shaft 17, thereby causing the hollow stirring blade 4 to rotate on its own. The hydrogen will be discharged through the exhaust holes 18 on the side walls of the hollow stirring blade 4. In this way, the hydrogen discharged from the exhaust holes 18 can be sprayed in all directions, which can increase and extend the contact area between the hydrogen and the raw materials, making the hydrogen reaction more sufficient and complete, reducing waste while also improving the preparation efficiency of bio-jet fuel.

[0030] In addition, as described above, since the slider 28 continuously reciprocates up and down, the air guide groove 31 on the side wall of the slider 28 will be connected with each rotary joint 30 in sequence, so the hydrogen will be sequentially input into the hollow stirring blades 4 at each height position through each rotary joint 30 and the connecting pipe 19, so that the hydrogen is discharged from the exhaust holes 18 at each height position and mixed with the raw material, which can make the hydrogen and the raw material mixed more fully and evenly, and further improve the preparation efficiency of bio-jet fuel.

[0031] Embodiment 2: Compared with the first embodiment, a plurality of air guide tubes 6 are fixedly connected to the side wall of the hollow square shaft 3 of the present embodiment, and the air guide tubes 6 are connected to the inside of the hollow square shaft 3, and the end of the air guide tube 6 away from the hollow square shaft 3 is connected to the expansion and contraction ball 7. Figure 5 As shown, the air inlet of the air guide pipe 6 is arranged on the inner wall of the hollow square shaft 3. When the slider 28 moves up and down, the air guide groove 31 can communicate with the air inlet of the air guide pipe 6, so that the hydrogen can be discharged into the expansion ball 7 through the air guide groove 31.

[0032] According to the first embodiment, the slider 28 reciprocates up and down inside the hollow square shaft 3, so the air guide groove 31 on the side wall of the slider 28 will be connected with each air guide pipe 6 in turn, and the hydrogen will be input into the expansion and contraction ball 7 through the air guide pipe 6, causing the expansion and contraction ball 7 to expand. When the slider 28 leaves the pipe mouth position of the air guide pipe 6, the expansion and contraction ball 7 relies on its own elastic contraction to recover, and the hydrogen inside can be squeezed back into the hollow square shaft 3, and transported to the inside of each hollow stirring blade 4 through the rotary joint 30 and the connecting pipe 19, and finally discharged from the exhaust hole 18 and mixed with the raw material.

[0033] As described above, during the reciprocating movement of the slider 28 up and down, hydrogen continuously enters and is discharged from the expansion and contraction ball 7, causing the expansion and contraction ball 7 to continuously expand and contract.

[0034] Whenever the expansion and contraction ball 7 contracts, a "cavity" area is formed near the ball. The liquid in the reactor quickly flows into this area under the action of pressure difference, forming a strong local convection, which can entrain the surrounding hydrogen bubbles, effectively prolong the residence time of hydrogen in the raw material, and promote the complete reaction of hydrogen. Every time the ball expands, it will expel the raw material liquid and hydrogen gathered around it in the previous contraction stage, forming an outward radiating flow field, which makes the material flow more intense, further improves the mixing efficiency, and makes the gas-liquid mixing more uniform.

[0035] Embodiment three: Reference Figure 4 and Figure 6 Compared with the first and second embodiments, a plurality of sleeves 9 are fixedly connected to the inner wall of the reactor 1, a driving rod 23 is slidably provided in the sleeve 9, a toggle plate 10 is fixedly connected to the driving rod 23, a disturbance rod 22 is fixedly connected to the side wall of the toggle plate 10, and the driving rod 23 is retracted by a telescopic device.

[0036] The telescopic device includes a spring 24, a rotating disk 5 and a plurality of toggle blocks 15. One end of the spring 24 is fixedly connected to the inner wall of the reactor 1, and the other end of the spring 24 is fixedly connected to the driving rod 23. The rotating disk 5 is fixedly connected to the hollow square shaft 3. The circumferential side wall of the rotating disk 5 is provided with an annular groove 20. A plurality of toggle blocks 15 are fixedly distributed around the annular groove 20 at equal intervals. The driving rod 23 is rotatably connected to a roller 21 at one end away from the spring 24, and the roller 21 moves along the annular groove 20. Specifically, when the hollow square shaft 3 drives the rotating disk 5 to rotate, the roller 21 will start to move on the surface of the annular groove 20, so that the roller 21 can pass through each protruding toggle block 15 in sequence. Whenever the roller 21 passes a toggle block 15, the toggle block 15 can push the roller 21 and force the driving rod 23 to move left. When the roller 21 leaves the toggle block 15, the spring 24 will push the driving rod 23 to move back and reset.

[0037] When the hollow square shaft 3 rotates, the turntable 5 can be driven to rotate together. At this time, the annular groove 20 in the middle of the turntable 5 will fit the roller 21 and force the roller 21 to rotate. As the turntable 5 rotates, the roller 21 will pass through each toggle block 15 in sequence. Figure 6 and Figure 4 As shown, when the roller 21 is released to a certain toggle block 15, it will press the roller 21 and force the driving rod 23 to move to the left. When the roller 21 leaves the toggle block 15, the spring 24 will push the driving rod 23 to move right and reset. Therefore, during the rotation of the hollow square shaft 3 and the turntable 5, the driving rod 23 moves back and forth left and right, and the toggle plate 10 and the disturbance rod 22 on the upper side thereof move back and forth left and right synchronously. In this way, the disturbance rod 22 can continuously poke the floating hydrogen bubbles, and the hydrogen bubbles can be broken into a large number of small bubbles, thereby further increasing the contact area between the hydrogen and the liquid raw material, and promoting a full and complete reaction.

[0038] The present invention also discloses a production method for preparing bio-jet fuel by a hydrodeoxygenation method. The production device for preparing bio-jet fuel by a hydrodeoxygenation method is used, and the method comprises the following steps: S1. Raw material pretreatment: Select appropriate biomass raw materials, such as vegetable oil, animal fat or waste oil, and perform impurity removal and dehydration treatment on them to ensure the purity of the raw materials and avoid impurities affecting subsequent reactions; S2, hydrodeoxygenation reaction, the pretreated raw material is fed into the reactor 1, and hydrogen is added into the reactor 1 through the gas injection pipe 13 in the gas adding component, and then a catalyst is added into the reactor 1, and the stirring component in the reactor 1 is started at the same time as the reactor 1, and the hydrodeoxygenation reaction is carried out under certain temperature and pressure conditions; S3, product separation: the product after the hydrodeoxygenation reaction enters the separation equipment, and the bio-jet fuel fraction is separated from the unreacted raw materials, hydrogen and other by-products by distillation, extraction and other methods; S4, distillation, the separated bio-jet fuel fraction is refined, and the hydrogenation refining process is used to further remove impurities such as sulfur and nitrogen, improve product quality, and make its various performance indicators meet the requirements of aviation kerosene standards.

[0039] 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 according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A production device for preparing bio-jet kerosene by a hydrodeoxygenation method, comprising a reactor (1), wherein a stirring component is provided in the reactor (1), wherein the stirring component is used to stir a reaction mixture, and wherein: The stirring assembly comprises a hollow square shaft (3), a plurality of hollow stirring blades (4) and a driving assembly, wherein the hollow square shaft (3) is rotatably arranged at the bottom of the reactor (1), one end of each of the hollow stirring blades (4) is fixedly connected to a rotating shaft (17), the other end of the hollow stirring blade (4) is fixedly connected to a connecting pipe (19), and the end of the connecting pipe (19) away from the hollow stirring blade (4) is rotatably connected to a rotating joint (30), and one end of the connecting pipe (19) is communicated with the interior of the hollow stirring blade (4), and the other end of the connecting pipe (19) is communicated with the rotating joint (30), and the rotating joint (30) is rotatably arranged on the inner wall of the hollow square shaft (3) and communicated with the interior of the hollow square shaft (3), and the side wall of the hollow stirring blade is provided with an exhaust hole (18); The driving assembly is used to drive the stirring assembly to rotate. The hollow square shaft (3) is provided with an aeration assembly, which is used to transport gas into the reactor (1). The reactor (1) is also provided with a rotating assembly, which is used to cause each hollow stirring blade (4) to rotate.

2. The production device for preparing bio-jet fuel by hydrodeoxygenation method according to claim 1, characterized in that: The rotating assembly comprises a plurality of annular racks (8) fixedly connected to the inner wall of the reaction kettle (1); one end of the rotating shaft (17) away from the hollow stirring blade (4) is fixedly connected to a driving gear (16); the driving gear (16) is meshed with the annular racks (8), and the driving gear (16) moves along the annular racks (8).

3. The production device for preparing bio-jet kerosene by hydrodeoxygenation according to claim 1, characterized in that: The driving assembly comprises a driving gear (12), a driven gear (11) and a driving motor (2); the driven gear (11) is fixedly connected to the hollow square shaft (3); the driving motor (2) is fixedly mounted on the upper end of the reaction kettle (1); the output shaft of the driving motor (2) is fixedly connected to the driving gear (12), and the driving gear (12) is meshed with the driven gear (11).

4. The production device for preparing bio-jet fuel by hydrodeoxygenation method according to claim 1, characterized in that: A plurality of air guide tubes (6) are fixedly connected to the side wall of the hollow square shaft (3), and the air guide tubes (6) are in communication with the interior of the hollow square shaft (3), and one end of the air guide tube (6) away from the hollow square shaft (3) is in communication with an expansion and contraction ball (7).

5. The production device for preparing bio-jet kerosene by hydrodeoxygenation method according to claim 1, characterized in that: The gas filling assembly comprises an air injection pipe (13), a telescopic pipe (25), a three-way pipe (26), a slider (28), a reciprocating screw (14) and a screw nut (27); the slider (28) is slidably arranged in the hollow square shaft (3); the reciprocating screw (14) is arranged inside the hollow square shaft (3); the upper end of the reciprocating screw (14) is fixedly connected to the top of the reactor (1); the screw nut (27) and the reciprocating screw (14) form a screw pair; the screw nut (27) is fixedly connected to the upper end of the slider (28); two air guide grooves (31) are provided on the side wall of the slider (28); the upper ends of the three-way pipe (26) are respectively communicated with the two air guide grooves (31); the lower end of the three-way pipe (26) is communicated with the telescopic pipe (25); and the air injection pipe (13) is communicated with the telescopic pipe (25).

6. The production device for preparing bio-jet fuel by hydrodeoxygenation method according to claim 5, characterized in that: The side wall of the sliding block (28) is tightly fitted with the inner wall of the hollow square shaft (3).

7. The production device for preparing bio-jet fuel by hydrodeoxygenation method according to claim 1, characterized in that: A plurality of sleeves (9) are fixedly connected to the inner wall of the reaction kettle (1), a driving rod (23) is slidably provided in the sleeve (9), a toggle plate (10) is fixedly connected to the driving rod (23), a disturbance rod (22) is fixedly connected to the side wall of the toggle plate (10), and the driving rod (23) is extended and retracted by a telescopic device.

8. The production device for preparing bio-jet fuel by hydrodeoxygenation method according to claim 7, characterized in that: The telescopic device comprises a spring (24), a rotating disk (5) and a plurality of toggle blocks (15); one end of the spring (24) is fixedly connected to the inner wall of the reaction kettle (1); the other end of the spring (24) is fixedly connected to a driving rod (23); the rotating disk (5) is fixedly connected to a hollow square shaft (3); a circular groove (20) is provided on a circumferential side wall of the rotating disk (5); a plurality of toggle blocks (15) are fixedly distributed around the circular groove (20) at equal intervals; one end of the driving rod (23) away from the spring (24) is rotatably connected to a roller (21); and the roller (21) moves along the circular groove (20).

9. A method for preparing bio-jet fuel by hydrodeoxygenation, using a production device for preparing bio-jet fuel by hydrodeoxygenation according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Raw material pretreatment: Select appropriate biomass raw materials, such as vegetable oil, animal fat or waste oil, and perform impurity removal and dehydration treatment on them to ensure the purity of the raw materials and avoid impurities affecting subsequent reactions; S2, hydrodeoxygenation reaction, the pretreated raw material is fed into the reactor (1), and hydrogen is added into the reactor (1) through the gas injection pipe (13) in the gas adding component, and then a catalyst is added into the reactor (1), and the stirring component in the reactor (1) is started while the reactor (1) is started, and the hydrodeoxygenation reaction is carried out under certain temperature and pressure conditions; S3, product separation: the product after the hydrodeoxygenation reaction enters the separation equipment, and the bio-jet fuel fraction is separated from the unreacted raw materials, hydrogen and other by-products by distillation, extraction and other methods; S4, distillation, the separated bio-jet fuel fraction is refined, and the hydrogenation refining process is used to further remove impurities such as sulfur and nitrogen, improve product quality, and make its various performance indicators meet the requirements of aviation kerosene standards.

10. The production device for preparing bio-jet fuel by the hydrodeoxygenation method according to claim 1, wherein the hollow stirring blade (4) is in a spiral twisted shape, and a one-way stop valve is installed in the connecting pipe (19).

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