Fluidized bed hydrogenation reaction device

Abstract

The utility model discloses a fluidized bed hydrogenation reaction device. The fluidized bed hydrogenation reaction device comprises a tank body, a support frame, a raw material inlet, a distribution disc, an auxiliary device, a catalyst inlet, a liquid discharge pipe, a gas outlet pipe and a catalyst discharge pipe, according to the utility model, the auxiliary device is arranged, so that the boiling floating catalyst can fall back conveniently, and meanwhile, the mixing degree of the catalyst, gas and liquid is increased, so that the contact reaction of the gas and the liquid is optimized, and the conversion rate of the reaction is improved; the shaftless spiral blade rotates due to boiling floating of a catalyst, gas and liquid, so that the shaftless spiral blade stirs materials in the tank body, the mixing degree of the materials in the tank body is increased, the materials are mixed up and down when the shaftless spiral blade moves up and down, certain resistance exists on the floating gas and liquid, and the stirring effect of the materials in the tank body is improved. Therefore, the reaction contact time is prolonged, and the reaction is more sufficient.

Description

Technical Field

[0001] The utility model relates to the field related to fluidized beds, in particular to a fluidized bed hydrotreating reaction device. Background Art

[0002] A fluidized bed, also known as a fluidized bed, uses fluidized bed technology to produce dust-free particles for various purposes or to perform particle coating (for example, to prevent moisture, prevent the product from reacting with oxygen or other substances, or to manufacture controlled-release preparations, etc.). There are requirements for repeatedly producing batch after batch of uniform products with good quality and appearance.

[0003] Chinese Patent No. CN201820188503.X discloses "Fluidized Bed Hydrotreating Reactor". By setting an inner cylinder, an outer cylinder, a flow guide body, etc., the solid catalyst separated by the three-phase separator settles and flows back into the reactor in the radial central area of the reactor, solving the problem of large resistance to the settlement and reflux of the catalyst when the catalyst loading is high, and reducing the probability of the solid catalyst being carried out of the reactor by the liquid material, and overcoming the influence on the reaction effect caused by uneven catalyst distribution caused by the rotation of the earth.

[0004] This structure has certain advantages, but there are still some deficiencies:

[0005] This structure sets an inner cylinder and an outer cylinder at the bottom of the liquid discharge pipeline, and the solid catalyst swirling on the reactor wall falls back to the middle of the reactor through the action of the inner and outer cylinders. During this process, as the solid catalyst boils and floats, it is easy to continuously hit the liquid discharge pipeline, causing the pipeline to be unstable and easily damaged. Moreover, the contact reaction time of gas and liquid needs to be increased to achieve more sufficient and comprehensive gas-liquid contact, so as to optimize and improve the conversion rate of reactions such as coal tar desulfurization and deamination. Summary of the Utility Model

[0006] Therefore, in order to solve the above deficiencies, the utility model provides a fluidized bed hydrotreating reaction device.

[0007] To achieve the above object, the utility model adopts the following technical solutions: A fluidized bed hydrotreating reaction device, comprising a tank body, a support frame, a raw material inlet, a distribution plate, an auxiliary device, a catalyst inlet, a drain pipe, an outlet pipe, and a catalyst discharge pipe. The outer side of the tank body is fixed with a support frame. The bottom end of the tank body is respectively provided with a raw material inlet and a catalyst discharge pipe. The distribution plate is installed at the inner bottom end of the tank body. The top end of the tank body is respectively provided with a catalyst inlet and an outlet pipe, and a drain pipe is installed at its right end. The auxiliary device is installed inside the tank body. The auxiliary device includes a mounting frame, a motor, a rotating shaft, a turntable, a support rod, a connecting rod, a second connecting rod, a shaftless spiral blade, a guide cover, and a guide member. The left end of the mounting frame is fixed to the tank body, and a motor is installed at its top end. The left end of the motor is connected to the rotating shaft by a coupling. The left end of the rotating shaft is fixed with a turntable, and its outer side is rotatably connected to the guide cover. The guide cover is fixed to the tank body. The left end of the turntable is fixed with a support rod. The outer side of the support rod is rotatably connected to a connecting rod. The bottom end of the connecting rod is rotatably connected to the second connecting rod. The top end of the shaftless spiral blade is rotatably connected to the second connecting rod. The second connecting rod is slidably connected to the guide cover.

[0008] Preferably, the guide member includes a drainage cylinder and a protective plate. The drainage cylinder and the protective plate are respectively fixed to the tank body. The protective plate is arranged at the right top end of the drainage cylinder.

[0009] In a further preferred embodiment, the top end of the drainage cylinder is inclined. This inclined setting enables the solid catalyst on the inner wall of the tank body during swirling to enter the interior of the drainage cylinder when encountering the lower part of the drainage cylinder during upward boiling and floating, and then return to the middle of the tank body, accelerating the speed of the catalyst returning to the middle of the tank body. And in cooperation with the protective plate arranged above the lower part, it effectively avoids the situation that the boiling and floating solid catalyst continuously impacts the drain pipe, causing damage to the drain pipe.

[0010] In a further preferred embodiment, the protective plate and the drain pipe are installed on the same side, which is convenient for the protective plate to protect the drain pipe and avoid the continuously impacting of the boiling and floating solid catalyst at the bottom on the drain pipe.

[0011] In a further preferred embodiment, the top end of the guide cover is triangular, which is convenient for guiding the solid catalyst falling back in the middle.

[0012] In a further preferred embodiment, the guide cover and the drainage cylinder are both arranged in the same vertical direction, which is convenient for the guide cover to be in the exact middle of the drainage cylinder and evenly guide the solid catalyst to both sides.

[0013] Preferably, further, connection ports are provided at the bottom end and the right end of the guiding cover. The connection port at the bottom end facilitates the guiding connection of the second connecting rod, enabling the second connecting rod to perform a vertical up-and-down sliding motion, while the connection port at the right end facilitates the insertion and rotation of the rotating shaft.

[0014] Preferably, further, the guiding cover is made of stainless steel, having good corrosion resistance and wear resistance, and is commonly used in the chemical industry.

[0015] Advantages of the present utility model:

[0016] By providing an auxiliary device, the present utility model facilitates the falling back of the boiling and floating catalyst, while increasing the mixing degree of the catalyst with gas and liquid, thereby optimizing the contact reaction between gas and liquid, improving the conversion rate of the reaction. Through the up-and-down movement of the shaftless spiral blade, and while moving up and down, due to the boiling and floating of the catalyst, gas and liquid, the shaftless spiral blade rotates, thereby agitating the materials inside the tank body, increasing the mixing degree of the internal materials. And when moving up and down, there is a situation of mixing the materials up and down, presenting a certain resistance to the floating gas and liquid, thereby lengthening the reaction contact time and making the reaction more sufficient.

[0017] By providing a guiding cover, the present utility model facilitates the guiding of the falling-back catalyst, enabling it to fall from a lower position, and by virtue of the speed, direction of the swirling flow and different heights during the falling-back, increasing the overall mixing degree. And by means of the protective plate installed on the same side as the drain pipe to protect the drain pipe, preventing the boiling and floating catalyst from hitting the drain pipe and causing damage to the drain pipe. Description of the drawings

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 is a sectional structural schematic diagram of the auxiliary device of the present utility model;

[0020] Figure 3 is a three-dimensional structural schematic diagram of the details of the auxiliary device of the present utility model;

[0021] Figure 4 is an enlarged structural schematic diagram of the details of the auxiliary device of the present utility model;

[0022] Figure 5 is a three-dimensional structural schematic diagram of the guiding member of the present utility model.

[0023] Wherein: tank body - 1, support frame - 2, raw material inlet - 3, distribution plate - 4, auxiliary device - 5, catalyst inlet - 6, drain pipe - 7, gas outlet pipe - 8, catalyst discharge pipe - 9, mounting frame - 51, motor - 52, rotating shaft - 53, turntable - 54, support rod - 55, connecting rod - 56, second connecting rod - 57, shaftless spiral blade - 58, guide cover - 59, guide member - 510, drainage cylinder - 5101, protective plate - 5102. Detailed implementation manner

[0024] In order to further explain the technical solution of the present invention, the following will be elaborated in detail through specific embodiments.

[0025] Please refer to Figure 1 , the present invention provides a fluidized bed hydrotreating reaction device, including a tank body 1, a support frame 2, a raw material inlet 3, a distribution plate 4, a catalyst inlet 6, a drain pipe 7, a gas outlet pipe 8, and a catalyst discharge pipe 9. A support frame 2 is fixed on the outer side of the tank body 1. The bottom end of the tank body 1 is respectively provided with a raw material inlet 3 and a catalyst discharge pipe 9. The distribution plate 4 is installed at the inner bottom end of the tank body 1. The top end of the tank body 1 is respectively provided with a catalyst inlet 6 and a gas outlet pipe 8, and a drain pipe 7 is installed at its right end.

[0026] In this embodiment, two groups of brackets are arranged inside the tank body 1 for supporting the guide cover 59 and the guide member 510, so that both the guide cover 59 and the guide member 510 are located in the exact middle of the inner side of the tank body 1. Among them, the loading amount of the catalyst in the tank body 1 is 60% - 75% of the inner volume of the tank body 1.

[0027] In addition, the fluidized bed hydrotreating reactor is provided with supporting devices, including a raw material pump, a heat exchanger, a heating furnace, a separator, a hydrogen delivery system, a reaction product separation system, and other equipment for achieving the purpose of fluidized bed hydrotreating.

[0028] Please refer to Figures 2 - 4 , the present invention provides a fluidized bed hydrotreating reaction device. The auxiliary device 5 is installed inside the tank body 1. The auxiliary device 5 includes a mounting frame 51, a motor 52, a rotating shaft 53, a turntable 54, a support rod 55, a connecting rod 56, a second connecting rod 57, a shaftless spiral blade 58, a guide cover 59, and a guide member 510. The left end of the mounting frame 51 is fixed to the tank body 1, and a motor 52 is installed at its top end. The left end of the motor 52 is drivingly connected to the rotating shaft 53 by a coupling. The left end of the rotating shaft 53 is fixed with a turntable 54, and its outer side is rotatably connected to the guide cover 59. The guide cover 59 is fixed to the tank body 1. The left end of the turntable 54 is fixed with a support rod 55. The outer side of the support rod 55 is rotatably connected to a connecting rod 56. The bottom end of the connecting rod 56 is rotatably connected to the second connecting rod 57. The top end of the shaftless spiral blade 58 is rotatably connected to the second connecting rod 57. The second connecting rod 57 is slidably connected to the guide cover 59.

[0029] In this embodiment, the top end of the guiding cover 59 is triangular, which is convenient for guiding the solid catalyst falling back in the middle. The guiding cover 59 and the drainage cylinder 5101 are both arranged in the same vertical direction, so that the guiding cover 59 can be centered on the exact middle of the drainage cylinder 5101, and evenly drain the solid catalyst to both sides. Connecting ports are arranged at the bottom end and the right end of the guiding cover 59. The connecting port at its bottom end is convenient for guiding and connecting the second connecting rod 57, enabling the second connecting rod 57 to perform a vertical up-and-down sliding action, while the connecting port at its right end is convenient for the insertion and rotation of the rotating shaft 53.

[0030] In this embodiment, by starting the motor 52, the rotating shaft 53 and the disc 54 are driven to rotate, and then the support rod 55 is driven to perform a circular rotation, causing the connecting rod 56 to drive the second connecting rod 57 to move, enabling the second connecting rod 57 to slide up and down inside the guiding cover 59, driving the up-and-down movement of the shaftless spiral blade 58, exerting a certain resistance on the floating material, increasing the residence time of the material in this area, lengthening the reaction contact time, realizing a full reaction, and moreover, the shaftless spiral blade 58 rotates driven by the swirling and floating material, increasing the degree of mixing of the material, facilitating the full reaction of the material.

[0031] Please refer to Figure 5 , the present utility model provides a fluidized bed hydrotreating reaction device. The guiding member 510 includes a drainage cylinder 5101 and a protective plate 5102. The drainage cylinder 5101 and the protective plate 5102 are respectively fixed to the tank body 1, and the protective plate 5102 is arranged at the right top end of the drainage cylinder 5101.

[0032] In this embodiment, the top end of the drainage cylinder 5101 is inclined. This inclined setting enables the solid catalyst swirling on the inner wall of the tank body 1 to directly enter the interior of the drainage cylinder 5101 when encountering the lower part of the drainage cylinder 5101 during upward boiling and floating, and then return to the middle of the tank body 1, accelerating the speed of the catalyst returning to the middle of the tank body. And in cooperation with the protective plate 5102 arranged above the lower part, it effectively avoids the situation that the boiling and floating solid catalyst continuously impacts the drain pipe 7, causing damage to the drain pipe 7. And the setting of this top inclined structure enables the continuously swirling solid catalyst to quickly enter when swirling to the lower part of the drainage cylinder 5101. The swirling direction cooperates with this inclined structure to enable the catalyst to enter the interior of the drainage cylinder 5101 at different initial speeds and directions, thereby breaking the original distribution law of the catalyst, increasing the collision and interaction between materials, and further improving the mixing effect, thus increasing the mutual mixing between the liquid raw material, the charged hydrogen, and the catalyst, contributing to improving the mixing effect and facilitating the full and efficient reaction of the fluidized bed. The protective plate 5102 and the drain pipe 7 are installed on the same side, which is convenient for the protective plate 5102 to protect the drain pipe 7 and avoid the continuously impacting of the boiling and floating solid catalyst at the bottom on the drain pipe 7.

[0033] Refer to Figures 1 - 5 During use, feedstock oil and the like are injected into the tank body 1 through the feedstock inlet 3, and are evenly dispersed into the bed layer through the distribution plate 4, and solid catalyst is put in through the catalyst inlet 6 to complete the preparation of reaction raw materials in the fluidized bed;

[0034] Then, hydrogen is injected through the feedstock inlet 3, and the gas is evenly distributed through the distribution plate 4, making the contact between the gas, liquid and solid catalyst more sufficient and uniform, and improving the conversion rate of the reaction;

[0035] During the fluidized bed hydrogenation reaction process, the gas, liquid and solid catalyst continuously react and boil and float. The gas is discharged from the tank body 1 through the gas outlet pipe 8, and the treated liquid is discharged through the drain pipe 7 for collection. The subsequent catalyst can be discharged through the catalyst discharge pipe 9. And during the reaction process, the solid catalyst swirls on the inner wall of the tank body 1, falls back to the middle of the tank body 1 again through the inclined drainage cylinder. And due to the setting of the inclined structure, the overall mixing degree of the materials inside the tank body 1 is increased, and in cooperation with the up and down movement of the shaftless spiral blade 58 and the rotational movement brought by the external force, the internal materials are stirred, and a certain resistance is generated to the materials floating in this area, thereby increasing the mixing contact time and contact area, making the reaction more sufficient and improving the conversion rate of the reaction.

[0036] The control mode of the present utility model is controlled by manually starting and closing the switch. The wiring diagram of the power element and the power supply are common knowledge in the art. And the present utility model is mainly used to protect the mechanical device, so the control mode and wiring layout of the present utility model will not be explained in detail.

[0037] The control mode of the present utility model is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The power supply is also common knowledge in the art. And the present utility model is mainly used to protect the mechanical device, so the control mode and circuit connection of the present utility model will not be explained in detail.

[0038] The above are only the preferred examples of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fluidized bed hydrogenation reaction device, comprising a tank body (1), a support frame (2), a raw material feed port (3), a distribution plate (4), a catalyst feed port (6), a liquid discharge pipe (7), an air outlet pipe (8), and a catalyst discharge pipe (9), wherein the support frame (2) is fixed to the outside of the tank body (1), the bottom end of the tank body (1) is respectively provided with a raw material feed port (3) and a catalyst discharge pipe (9), the distribution plate (4) is installed at the bottom end of the tank body (1), the top end of the tank body (1) is respectively provided with a catalyst feed port (6) and an air outlet pipe (8), and the right end thereof is provided with a liquid discharge pipe (7); Features: The invention also comprises an auxiliary device (5), which is installed inside the tank body (1). The auxiliary device (5) comprises a mounting frame (51), a motor (52), a rotating shaft (53), a rotating disk (54), a supporting rod (55), a connecting rod (56), a second connecting rod (57), a shaftless spiral blade (58), a guide cover (59), and a guide member (510). The left end of the mounting frame (51) is fixed to the tank body (1), and a motor (52) is installed on the top of the mounting frame. The left end of the motor (52) is driven by the rotating shaft (53) through a coupling. A rotating disk (54) is fixed to the left end of the rotating shaft (53), and the outer side of the rotating disk (54) is rotatably connected to a guide cover (59), the guide cover (59) is fixed to the tank body (1), a supporting rod (55) is fixed to the left end of the rotating disk (54), the outer side of the supporting rod (55) is rotatably connected to a connecting rod (56), the bottom end of the connecting rod (56) is rotatably connected to a second connecting rod (57), the top end of the shaftless spiral blade (58) is rotatably connected to the second connecting rod (57), and the second connecting rod (57) is slidably connected to the guide cover (59).

2. The ebullated bed hydrogenation reaction device according to claim 1, characterized in that: The guide member (510) comprises a drainage tube (5101) and a protective plate (5102); the drainage tube (5101) and the protective plate (5102) are respectively fixed to the tank body (1); and the protective plate (5102) is arranged at the top right side of the drainage tube (5101).

3. The ebullated bed hydrogenation reaction device according to claim 2, characterized in that: The top end of the drainage tube (5101) is inclined.

4. The ebullated bed hydrogenation reaction device according to claim 2, characterized in that: The protective plate (5102) and the drain pipe (7) are installed on the same side.

5. The ebullated bed hydrogenation reaction device according to claim 1, characterized in that: The top end of the guide cover (59) is triangular in shape.

6. The ebullated bed hydrogenation reaction device according to claim 1, characterized in that: The guide cover (59) and the drainage tube (5101) are both arranged in the same vertical direction.

7. The ebullated bed hydrogenation reaction device according to claim 1, characterized in that: The bottom end and the right end of the guide cover (59) are both provided with connection ports.

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