A gas-liquid distribution device for a fluidized bed reactor

Abstract

The utility model relates to the technical field of gas-liquid distribution, and in particular to a gas-liquid distribution device for a fluidized bed reactor, which comprises a central tube and a bubble cover, wherein the bubble cover is fixedly sleeved on the upper end of the outer periphery of the central tube; a support plate is fixed at the middle end of the central tube, two through holes are opened in the support plate which pass through the inner periphery, a rotating rod is provided at the lower end of the support plate, and a spiral acceleration blade is fixed at the outer periphery of the rotating rod; a hole seat is fixed at the upper end of the central tube, gas-liquid outlets close to the top of the hole seat are opened on both sides of the central tube, and a sealing plate is provided on the upper end of the hole seat; the utility model arranges spiral acceleration blades in the central tube, so that the gas-liquid mixture is accelerated to rise through the rotation of the spiral acceleration blades, which is beneficial to quickly inputting the gas-liquid mixture into the bubble cover, and compared with the prior art, the problem of slow rising speed of the gas-liquid mixture is effectively solved, thereby facilitating the improvement of the formation efficiency of microbubbles.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid distribution, in particular to a gas-liquid distribution device for a fluidized bed reactor. Background Art

[0002] The fluidized bed reactor is a reaction system composed of three phases: gas, liquid and solid. It is widely used in industrial reaction processes, especially for inferior raw materials that are difficult to handle with traditional hydrogenation processes. In the biomass pyrolysis liquid fluidized bed reactor, unreasonable fluid distribution design will directly affect the service life of the catalyst. The gas-liquid distributor is an important internal component to ensure the uniform distribution of gas and liquid in the bed, which directly affects the smooth operation and reaction efficiency of the fluidized bed reactor. The technology of upgrading and modifying biomass pyrolysis liquid through processes such as hydrodeoxygenation and hydrocracking to obtain petroleum substitute products has developed rapidly, among which the biomass pyrolysis liquid fluidized bed reactor is one of the key technologies.

[0003] The Chinese patent authorization announcement number CN 210009940 U discloses a gas-liquid distributor for a biomass pyrolysis liquid fluidized bed reactor, which is mainly composed of a bubble cap, a central tube, a conical ball seat, a check ball, a limit seat and a distribution plate; wherein the bubble cap is a cover-shaped object with a slit on the bottom wall of the tube, the bottom of the bubble cap is embedded in the distribution plate, and the top blind end of the bubble cap is connected to the upper end of the central tube; a gas-liquid outlet is provided on the tube wall at the lower end of the central tube, and a gas-liquid inlet is provided at the lower end of the central tube; a through annular channel is formed between the central tube and the bubble cap; the conical ball seat is arranged on the tube wall of the central tube at the lower part of the gas-liquid outlet, and the check ball is located on the conical ball seat; the limit seat is arranged in the central tube and is located at the upper part of the gas-liquid outlet. The use of this application can facilitate the positioning of the bubble cap, and at the same time, the gas in the gas-liquid feed forms stable microbubbles, improves the ability of the material to purge the catalyst, avoids the formation of a dead zone on the distribution plate, prevents the material from accumulating on the surface of the distribution plate and coking, and ensures the long-term operation of the equipment.

[0004] The prior art also has the following deficiencies. When the gas-liquid mixture enters the central tube and moves upward, due to the lack of a structure to accelerate the upward movement of the gas-liquid mixture, the gas-liquid mixture rises slowly, affecting the efficiency of microbubble formation. Moreover, when a check ball is used to prevent the gas-liquid mixture from flowing back, the check ball will shake in the central tube when the gas-liquid mixture pushes up on it, and the gas-liquid outlet may even be blocked due to the shaking of the check ball, thereby affecting the smoothness of the gas-liquid mixture entering the bubble cover through the gas-liquid outlet. Utility Model Content

[0005] The utility model provides a gas-liquid distribution device for a fluidized bed reactor, which is beneficial to improving the rising speed of a liquid mixture and ensuring the smoothness of the gas-liquid mixture entering into a bubble cover through a gas-liquid outlet.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A gas-liquid distribution device for a fluidized bed reactor comprises a central tube and a bubble cover, wherein the bubble cover is fixedly sleeved on the upper end of the outer periphery of the central tube;

[0008] A support plate is fixed at the middle end of the central tube, two through holes are formed in the support plate, a rotating rod is provided at the lower end of the support plate, and a spiral acceleration blade is fixed at the periphery of the rotating rod;

[0009] A hole seat is fixed at the upper end of the center tube, and gas and liquid outlets close to the top of the hole seat are opened on both sides of the center tube. The upper end of the hole seat opening is covered with a sealing plate, and a conical plug is connected to the lower end of the sealing plate, and the conical plug is connected to the hole opening of the hole seat. A limiting rod is fixed to the upper end of the sealing plate, and a partition fixed in the center tube is provided above the sealing plate, and the limiting rod slides upward and passes through the partition.

[0010] Furthermore, a perforated plate is fixed at the lower end of the central tube.

[0011] Furthermore, a protective cover is fixed to the middle of the upper end of the support plate, a motor is fixed inside the protective cover, the rotating rod rotates through the support plate and penetrates into the protective cover, and the power end of the motor is connected to the upper end of the rotating rod.

[0012] Furthermore, the lower end of the sealing plate is connected to a sealing ring which is sleeved on the periphery of the conical plug.

[0013] Furthermore, a telescopic sleeve is connected between the partition plate and the sealing plate and is sleeved on the periphery of the limiting rod.

[0014] Furthermore, a distribution plate is provided on the periphery of the central tube, and the bubble cover is embedded in the upper end of the distribution plate.

[0015] Beneficial effects of the utility model:

[0016] 1. By arranging a spiral accelerating blade in the central tube, the rotation of the spiral accelerating blade drives the gas-liquid mixture to accelerate its rise, which is conducive to quickly inputting the gas-liquid mixture into the bubble cover. Compared with the existing technology, it effectively solves the problem of the slow rising speed of the gas-liquid mixture, thereby facilitating the improvement of the formation efficiency of microbubbles;

[0017] 2. The orifice of the hole seat is blocked by setting a conical plug. Since the gas-liquid mixture rises quickly, the conical plug and the sealing plate can be easily pushed upwards, and the movement of the sealing plate and the conical plug is limited by the limit rod, which is beneficial to prevent the sealing plate and the conical plug from shaking in the central tube, and also helps to avoid the sealing plate and the conical plug from blocking the gas-liquid outlet due to shaking, so that the gas-liquid mixture can smoothly enter the bubble cover, effectively ensuring the smooth operation of the gas-liquid distribution device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the support plate structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the enlarged structure of the A part of the utility model.

[0021] Description of reference numerals:

[0022] Central tube 1, orifice plate 2, support plate 3, spiral acceleration blade 4, through hole 5, protective cover 6, motor 7, rotating rod 8, hole seat 9, gas-liquid outlet 10, tapered plug 11, partition 12, sealing plate 13, sealing ring 14, limiting rod 15, telescopic sleeve 16, bubble cover 17, distribution plate 18. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0024] like Figure 1-2 As shown, in this embodiment, it includes a central tube 1 and a bubble cover 17, the bubble cover 17 is fixedly sleeved on the upper end of the outer periphery of the central tube 1, a support plate 3 is fixed at the middle end inside the central tube 1, two through holes 5 are opened inside the support plate 3 which pass through from top to bottom, a rotating rod 8 is provided at the lower end of the support plate 3, a spiral acceleration blade 4 is fixed on the outer periphery of the rotating rod 8, a protective cover 6 is fixed at the middle part of the upper end of the support plate 3, a motor 7 is fixed inside the protective cover 6, the rotating rod 8 rotates through the support plate 3 and penetrates into the protective cover 6, and the power end of the motor 7 is connected to the upper end of the rotating rod 8.

[0025] When the gas-liquid mixture enters the central tube 1, a spiral acceleration blade 4 is arranged in the central tube 1, and then the motor 7 drives the rotating rod 8 and the spiral acceleration blade 4 to rotate, so that the gas-liquid mixture is accelerated to rise through the rotation of the spiral acceleration blade 4, and the gas-liquid mixture quickly enters the hole seat 9 through the through hole 5 on the support plate 3. Under the premise that the hole mouth of the hole seat 9 is opened, it is beneficial to quickly input the gas-liquid mixture into the bubble cover 17 through the gas-liquid outlet 10. Compared with the prior art, the problem of slow rising speed of the gas-liquid mixture is effectively solved, thereby helping to improve the formation efficiency of microbubbles.

[0026] like Figure 1 , 3 As shown, in this embodiment, a hole seat 9 is fixed at the upper end of the center tube 1, and gas-liquid outlets 10 close to the top of the hole seat 9 are opened on both sides of the center tube 1. The upper end of the hole mouth of the hole seat 9 is covered with a sealing plate 13, and the lower end of the sealing plate 13 is connected to a conical plug 11, and the conical plug 11 is connected to the hole mouth of the hole seat 9. A limiting rod 15 is fixed to the upper end of the sealing plate 13, and a partition 12 fixed in the center tube 1 is provided above the sealing plate 13, and the limiting rod 15 slides upward and passes through the partition 12.

[0027] When the gas-liquid mixture accelerates to rise, under the premise that the conical plug 11 blocks the orifice of the hole seat 9, due to the rapid rising speed of the gas-liquid mixture, the conical plug 11 and the sealing plate 13 can be easily pushed upward by the thrust of the gas-liquid mixture. At this time, the sealing plate 13 drives the limiting rod 15 to slide upward along the partition 12, so the movement of the sealing plate 13 and the conical plug 11 is limited by the limiting rod 15, which is beneficial to prevent the sealing plate 13 and the conical plug 11 from shaking in the central tube 1, and also helps to avoid the sealing plate 13 and the conical plug 11 from blocking the gas-liquid outlet 10 due to shaking, so that the gas-liquid mixture can smoothly enter the bubble cover 17, effectively ensuring the smooth operation of the gas-liquid distribution device.

[0028] like Figure 3 As shown, in this embodiment, the lower end of the sealing plate 13 is connected to a sealing ring 14 which is sleeved on the outer periphery of the conical plug 11 .

[0029] When the gas-liquid mixture is stopped from being transported into the central tube 1 and the bubble cover 17, the sealing plate 13, the limiting rod 15 and the tapered plug 11 will automatically move downward due to their own gravity, so the tapered plug 11 will dock downward into the orifice of the hole seat 9, forming an automatic seal for the hole seat 9, and the sealing plate 13 will drive the sealing ring 14 to press on the hole seat 9, and the sealing ring 14 will help to improve the sealing between the hole seat 9 and the sealing plate 13, and better improve the sealing of the hole seat 9, thereby helping to better prevent the gas-liquid mixture from flowing back.

[0030] like Figure 1As shown, in this embodiment, a perforated plate 2 is fixed at the lower end of the central tube 1 .

[0031] By providing the orifice plate 2, the gas-liquid mixture is compressed and mixed through the orifice plate 2, which is beneficial to ensure mixing uniformity.

[0032] like Figure 3 As shown, in this embodiment, a telescopic sleeve 16 is connected between the partition plate 12 and the sealing plate 13 and is sleeved on the outer periphery of the limiting rod 15 .

[0033] By setting a telescopic sleeve 16 between the partition 12 and the sealing plate 13 and sleeved on the outer periphery of the limit rod 15, the telescopic sleeve 16 will be stretched when the sealing plate 13 moves up and down, thereby ensuring the normal up and down movement of the sealing plate 13. In addition, the telescopic sleeve 16 can prevent the gas-liquid mixture from leaking in the gap at the connection between the limit rod 15 and the partition 12, which is beneficial to reduce the waste of the gas-liquid mixture.

[0034] like Figure 1 As shown, in this embodiment, a distribution plate 18 is provided on the periphery of the central tube 1 , and the bubble cover 17 is embedded in the upper end of the distribution plate 18 .

[0035] By providing the distribution plate 18 , since the bubble cover 17 is embedded on the distribution plate 18 , it is possible to prevent the solid catalyst particles in the fluidized bed from being deposited on the upper surface of the distribution plate 18 .

[0036] All technical features in this embodiment can be freely combined according to actual needs.

[0037] The above embodiments are preferred implementation schemes of the present invention. In addition, other implementation schemes are also included. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A gas-liquid distribution device for an ebullating bed reactor, comprising a central tube (1) and a bubble cover (17), wherein the bubble cover (17) is fixedly sleeved on the upper end of the outer periphery of the central tube (1), characterized in that: A support plate (3) is fixed at the middle end of the central tube (1), two through holes (5) are formed in the support plate (3) and extend vertically therethrough, a rotating rod (8) is provided at the lower end of the support plate (3), and a spiral accelerating blade (4) is fixed to the periphery of the rotating rod (8); A hole seat (9) is fixed at the upper end of the center tube (1), and gas-liquid outlets (10) close to the top of the hole seat (9) are opened on both sides of the center tube (1). The upper end of the hole opening of the hole seat (9) is covered with a sealing plate (13), and the lower end of the sealing plate (13) is connected to a conical plug (11), and the conical plug (11) is connected to the hole opening of the hole seat (9). A limiting rod (15) is fixed at the upper end of the sealing plate (13), and a partition (12) fixed in the center tube (1) is provided above the sealing plate (13), and the limiting rod (15) slides upward and passes through the partition (12).

2. A gas-liquid distribution device for an ebullated bed reactor as claimed in claim 1, characterized in that: A perforated plate (2) is fixed to the lower end of the central tube (1).

3. A gas-liquid distribution device for an ebullated bed reactor as claimed in claim 1, characterized in that: A protective cover (6) is fixed in the middle of the upper end of the support plate (3), a motor (7) is fixed in the protective cover (6), the rotating rod (8) rotates through the support plate (3) and penetrates into the protective cover (6), and the power end of the motor (7) is connected to the upper end of the rotating rod (8).

4. A gas-liquid distribution device for an ebullated bed reactor as claimed in claim 1, characterized in that: The lower end of the sealing plate (13) is connected to a sealing ring (14) sleeved on the outer periphery of the conical plug (11).

5. A gas-liquid distribution device for an ebullated bed reactor as claimed in claim 1, characterized in that: A telescopic sleeve (16) is connected between the partition plate (12) and the sealing plate (13) and is sleeved on the periphery of the limiting rod (15).

6. A gas-liquid distribution device for an ebullated bed reactor as claimed in claim 1, characterized in that: A distribution plate (18) is provided on the periphery of the central tube (1), and the bubble cover (17) is embedded on the upper end of the distribution plate (18).

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