A rotary distributor system for a circulating countercurrent bed reactor and its application method

Abstract

The present invention belongs to the technical field of devices for chemical method applications, and specifically relates to a rotary distributor system of a circulating countercurrent bed reactor and an application method thereof. The cyclone distributor system includes a settler, a reactor, a solid distributor, a feeder and an air duct; the feeder includes a regeneration inclined tube and a lower agent port, the solid distributor includes a solid collector, a connecting disc, a solid channel and a rotating shaft, the solid collector is a funnel structure, the opening at the top thereof is directly opposite to the lower agent port, a connecting disc is arranged directly below, the solid channels are sequentially arranged at the outer edge of the connecting disc and communicate with the connecting disc, the end of the solid channel extends to the reactor wall, and circular holes are evenly opened on the connecting disc and the solid channel. The center of the bottom of the connecting disc is connected to the rotating shaft, the rotating shaft is connected to the reactor wall through a support rod for fixing, the rotating shaft drives the connecting disc and each solid channel to rotate at a uniform speed with the rotating shaft as the central axis, so that the catalyst solid particles can slide evenly on the entire disc.

Description

Technical Field

[0001] The present invention belongs to the technical field of devices for applying chemical methods, and specifically relates to a rotary distributor system of a circulating countercurrent bed reactor and an application method thereof, which can be applied to the fields of petrochemical industry, coal pyrolysis, waste plastic cracking, coking, etc. Background Art

[0002] At present, energy industries such as petrochemicals, coal chemicals, and waste plastic recycling chemicals mostly use circulating fluidized beds as the main catalytic reactors. Circulating fluidized beds are divided into co-current fluidized beds and counter-current fluidized beds. In the circulating counter-current fluidized bed, solid particles move downward from the top of the reactor, while the gas moves upward. The gas-solid phase is in a counter-current contact state, and the gas-solid contact efficiency is better than that of the co-current bed, which is conducive to reverse mass transfer and heat transfer between the gas-solid phase, and can significantly improve the reaction efficiency and the yield of the target product. Taking the catalytic cracking of waste plastics as an example, in the reactor, the hot gas of the waste plastics needs to achieve uniform contact with the solid catalyst particles to occur mass transfer and heat transfer. In the axial direction of the reactor, the reaction temperature and the active atmosphere of the catalyst are continuously increased and enhanced as the reaction proceeds, which can meet the energy demand of the negative correlation between the molecular weight of the same hydrocarbons and the cracking activation energy, and can achieve the purpose of adapting the optimal cracking conditions for hydrocarbons of different molecular weights in the process of waste plastic cracking, and improve the selectivity of the target product short-chain low-carbon olefins.

[0003] The circulating countercurrent bed in the energy industry is generally larger in inner diameter due to the sum of the solid particle processing volume and the reaction time, resulting in extremely uneven distribution of solid particles inside. If a solid distributor system is not installed, the solid particles generally present a "ring-core" flow distribution with the same diameter as the lower agent port, which limits the gas-solid contact area and significantly affects the gas-solid mass transfer and heat transfer efficiency. At present, most general circulating countercurrent bed solid distributors use horizontal plate distributors. The movement state of solid particles on the entire plate is uncontrolled, and a slight disturbance inside the reactor can cause overall deviation of solid particles. Therefore, it is particularly necessary to design a reasonable solid distributor system so that the movement state of radial solid phase particles on the solid distributor meets the requirements, so that the solid particles are evenly distributed in the reactor and the particles can fall smoothly. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a rotating distributor system for a circulating countercurrent bed reactor and an application method thereof, so as to improve the controllability of the motion state of solid particles on the solid distributor disk, solve the problem of particle accumulation and falling in the middle of the reactor, and achieve uniform distribution of solid particles in the radial direction.

[0005] The technical solutions adopted are:

[0006] A rotary distributor system for a circulating countercurrent bed reactor, comprising a settler, a reactor, a feeder, and an air guide pipe, wherein the settler is connected to the reactor by an inclined gentle slope, the feeder comprises a regeneration inclined pipe and a lower agent port, and is characterized in that the rotary distributor system further comprises a rotatable solid distributor;

[0007] The solid distributor includes a solid collector, a connecting disc, a solid channel and a rotating shaft. The solid collector is a funnel structure, and the opening at the top is directly opposite to the lower agent port. The solid collector is fixed in the center of the settler and the reactor through an annular support and a horizontal support. A connecting disc is arranged directly below the solid collector, and a solid channel is arranged on the outer edge of the connecting disc. The solid channel is a rectangular straight-through pipe, which is connected to the connecting disc and the end of which extends to the reactor wall. Circular holes are evenly arranged on the connecting disc and the solid channel. The center of the bottom of the connecting disc is connected to a vertical rotating shaft, and the rotating shaft is connected to the reactor wall through a support rod for fixation. The rotating shaft rotates driven by a motor, and the rotating shaft drives the connecting disc and the solid channel to rotate.

[0008] Preferably, the annular support is fixed to the wall of the settler through a slot, one end of the horizontal support is connected to the annular support, and the other end is connected to the outside of the solid collector.

[0009] Preferably, the inclination angle of the side wall of the solid collector is greater than the repose angle of the solid particles used, and the inclination angle is 1 to 10 degrees higher than the repose angle.

[0010] Preferably, the regeneration inclined tube is an inclined single tube structure, the angle between the regeneration inclined tube and the wall of the settler is 45°, the lower dose port is a T-shaped blind end structure, the opposite end of the blind end is connected to the regeneration inclined tube, and an annular partition is arranged in the vertical section of the lower dose port; the lower dose port is arranged on the central axis of the settler, and the regeneration inclined tube and the lower dose port are integrally formed.

[0011] Preferably, 4 to 8 solid channels are provided, which are sequentially arranged on the outer edge of the connecting disk.

[0012] As a further preference, the ends of each solid channel are on the same plane and do not contact the reactor wall; each solid channel is provided with two side walls and a bottom end face, an open top end, and vertically downward circular holes are evenly arranged on the bottom end face, and the side wall and the bottom end face are smoothly connected by a gently sloping surface; the inclination angle of each solid channel is complementary to the inclination angle of the side wall of the solid collector.

[0013] Preferably, the bottom end surface of each solid channel is provided with rows of equidistant circular holes with the same radius, with an opening rate of 30-50%, and the number of rows is set according to needs.

[0014] Preferably, a circular hole pointing vertically downward is provided on the connecting disc, and the connecting disc has a conical or arc-shaped disc surface. The inclination angle of the connecting disc is smaller than the repose angle of the solid particles used, and the inclination angle is 0.1 to 5 degrees less than the repose angle.

[0015] Preferably, the diameter of the connecting disk accounts for 10-15% of the diameter of the reactor, and the disk surface is evenly provided with equidistant circular holes of the same radius, and the opening rate is 10-20%. Generally, the circular holes provided on the bottom end surface of the solid channel are the same size as the circular holes of the connecting disk.

[0016] Preferably, 4 to 8 air guide pipes are arranged, which are evenly distributed at equal angles around the reactor and settler outside the solid distributor; the top connecting port of the air guide pipe is located on the settler wall above the lower agent port, and the bottom connecting port is located on the reactor wall below the rotating shaft.

[0017] An application method of a rotary distributor system of a circulating countercurrent bed reactor comprises the following steps:

[0018] (1) The solid collector is fixed by an annular support and a horizontal support, the annular support is close to the reactor wall and is fixed with a slot;

[0019] (2) A connecting disc is arranged directly below the solid collector, and a rotating shaft is welded downwardly at the bottom of the center of the connecting disc. The rotating shaft is fixed to the reactor wall through a supporting rod, and the rotating shaft drives each solid channel to rotate at a uniform speed through the connecting disc;

[0020] (3) The wall of the settler is provided with a connection hole adapted to the regeneration inclined tube of the feeder. The regeneration inclined tube extends out of the wall of the settler through the connection hole to connect to the regenerator. The lower agent port is provided at the center of the settler. The catalyst solid particles are transported from the regenerator through the regeneration inclined tube to the bottom of the lower agent port and fall onto the solid distributor.

[0021] (4) After the catalyst solid particles fall from the lower agent port, they are collected by the solid collector. Under the action of the set inclination angle, the catalyst solid particles quickly tilt and slide to the bottom outlet of the solid collector, then fall on the connecting disc and continue to slide to the solid channel. Since the inclination angle of the solid channel is smaller than the repose angle of the particles, the solid particles can be evenly distributed in the entire solid channel, which not only ensures the amount of falling particles, but also avoids the accumulation of particles inside. The particles fall through the circular hole and are evenly distributed in the entire reactor by the rotation of the solid channel;

[0022] (5) The settler and reactor balance the pressure difference caused by the transportation of solid particles through the air duct, so that there is no particle accumulation above the solid distributor and the particles fall smoothly and stably, thereby achieving steady-state long-term operation of the reaction.

[0023] The rotational power of the rotating shaft comes from an external power supply. A power line is arranged on the supporting rod, and the rotation of the rotating shaft can be realized according to the existing technology.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The circular holes provided on the solid channel of the rotary distributor system adopted in the present invention can improve the controllability of the falling state of the catalyst solid particles on the solid distributor disk, and can achieve uniform distribution of the solid particles in the radial direction.

[0026] The rotary distributor system used in the present invention is designed with a conical disk surface connected to the disk, which can solve the problem of catalyst solid particles piling up and falling in the middle of the reactor, and achieves uniform sliding of the catalyst solid particles on the entire disk.

[0027] The rotating distributor system adopted in the present invention, the design of the inclination angle of the solid channel and the uniform rotation of the solid channel can improve the controllability of the motion state of the catalyst solid particles inside the reactor and achieve uniform coverage of the catalyst solid particles on the entire reactor diameter surface.

[0028] The upper and lower communicating air guide pipes adopted in the present invention can solve the problem that particles are difficult to fall due to the installation of a solid distributor, ensure the stability of the particle circulation rate, and realize the steady-state long-cycle operation of the entire circulating countercurrent bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the rotating distributor system according to the present invention.

[0030] Figure 2 It is a front view of the solid collector of the present invention.

[0031] Figure 3 It is a top view of the solid collector of the present invention.

[0032] Figure 4 It is a front view of the solid distributor of the present invention.

[0033] Figure 5 It is a top view of the solid distributor of the present invention.

[0034] Figure 6 This is an axial position diagram of the measurement site of the reactor in an embodiment of the present invention.

[0035] Figure 7 This is a radial position azimuth diagram of the reactor measurement site in an embodiment of the present invention.

[0036] Figure 8 This is a comparison curve of the dimensionless radial position and solid volume fraction in the SN direction depending on whether the solid distributor is rotated or not in Example 1 of the present invention.

[0037] Fig. 9 This is a comparison curve of the dimensionless radial position and solid volume fraction in the SN deflection direction of 30° depending on whether the solid distributor is rotated or not in Example 1 of the present invention.

[0038] Fig.10 This is a comparison curve of the dimensionless radial position and solid volume fraction in the 60° SN deflection direction depending on whether the solid distributor is rotated or not in Example 1 of the present invention.

[0039] Fig.11 This is a comparison diagram of the solid phase concentration distribution in the radial EW direction in Example 2 of the present invention without a solid distributor and with a solid distributor.

[0040] In the figure, 1-regeneration inclined tube, 2-lower agent port, 3-settler, 4-annular support, 5-air guide tube, 6-solid collector, 7-reactor, 8-solid distributor, 9-solid channel, 10-support rod, 11-rotating shaft, 12-connecting disc. DETAILED DESCRIPTION

[0041] The accompanying drawings are only used for illustrative purposes, and the prior art or common knowledge is omitted. The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0042] The present invention has been applied to the cold state device and the hot state device of the waste plastic circulating countercurrent bed. The cold state device is made of acrylic organic glass, and the hot state device is made of 304 stainless steel material due to the need for high temperature of waste plastic cracking; and the cold state device and the hot state device have the same size, and the inner diameter of the reactor 7 is 10 cm.

[0043] like Figure 1 As shown, a double-layer distributor system of a circulating countercurrent bed reactor includes a settler 3 and a reactor 7. The settler 3 is connected to the reactor 7 by an inclined gentle slope. The rotating distributor system also includes a rotatable solid distributor 8, a feeder and an air guide pipe 5.

[0044] The feeder includes a regeneration inclined tube 1 and a lower dose port 2. The regeneration inclined tube 1 is an inclined single tube structure, and the lower dose port 2 is a T-shaped blind end structure. The opposite end of the blind end is connected to the regeneration inclined tube 1. The regeneration inclined tube 1 and the lower dose port 2 are integrally formed; an annular partition is arranged in the vertical section of the lower dose port 2.

[0045] like Figure 2 , 3As shown in Figure 4, the solid distributor 8 includes a solid collector 6, a connecting disc 12, a solid channel 9 and a rotating shaft 11. The solid collector 6 is a funnel structure, and the opening at the top thereof is directly opposite to the lower agent port 2; the solid collector 6 is fixed in the center of the settler 3 and the reactor 7 through an annular support 4 and a horizontal support; a connecting disc 12 is arranged directly below the solid collector 6, and the connecting disc 12 is an arc-shaped disc surface, and the distance between the bottom outlet of the solid collector 6 and the top center of the connecting disc 12 is close, and the distance does not exceed 1 / 3 of the diameter of the reactor 7.

[0046] The solid channel 9 is a rectangular straight-through pipe, 8 of which are arranged in sequence at the outer edge of the connecting disk 12 and communicated with the connecting disk 12. The end of each solid channel 9 extends to the wall of the reactor 7 (but does not contact the wall of the reactor 7), and circular holes are evenly opened on each solid channel 9; the center of the bottom of the connecting disk 12 is connected to the vertical rotating shaft 11 by welding, and the rotating shaft 11 is connected to the wall of the reactor 7 by a support rod 10 for fixation.

[0047] The rotating shaft 11 is connected to a motor outside the reactor and rotates under the drive of the motor, thereby driving the connecting disc 12 and each solid channel to rotate at a uniform speed around the rotating shaft as the central axis to evenly distribute the catalyst particles.

[0048] The air guide pipes 5 are provided with four pieces, which are evenly distributed at equal angles around the reactor 7 and the settler 3 outside the solid distributor 8. The diameter of the settler 3 is twice the diameter of the reactor 7.

[0049] The annular support 4 is fixed to the wall of the settler 3 through a slot, one end of the horizontal support is connected to the annular support 4, and the other end is connected to the outside of the solid collector 6. The inclination angle of the side wall of the solid collector 6 is greater than the repose angle of the solid particles used, and the inclination angle is 1 degree higher than the repose angle.

[0050] The inclination angle of each solid channel 9 is complementary to the inclination angle of the side wall of the solid collector 6. Generally, when setting, the inclination angle of the solid channel 9 is smaller than the repose angle of the catalyst solid particles.

[0051] Each solid channel 9 is provided with two side walls and a bottom end face, and the top end is open. The bottom end face thereof is evenly provided with circular holes vertically downward, and the side walls and the bottom end face are smoothly connected by a gentle slope. The bottom end face of each solid channel 9 is provided with 21 rows of circular holes with the same radius at equal distances, each row is composed of 3 circular holes, and the opening rate is 50%.

[0052] The connecting disc 12 is provided with a circular hole pointing vertically downward, and the inclination angle of the connecting disc 12 is less than the repose angle of the solid particles used, and the inclination angle is 0.5 degrees less than the repose angle. The diameter of the connecting disc accounts for 15% of the diameter of the reactor 7, and the arc-shaped disc surface is evenly provided with 4 rows of circular holes with the same radius at equal distances, and the opening rate is 10%.

[0053] The top connection port of the air guide pipe 5 is located on the wall of the settler 3 above the lower agent port 2 , and the bottom connection port is located on the wall of the reactor 7 below the rotating shaft 11 .

[0054] An application method of a rotary distributor system of a circulating countercurrent bed reactor comprises the following steps:

[0055] (1) The solid collector 6 is fixed by the annular support 4 and the horizontal support. The annular support 4 is close to the wall of the reactor 7 and is fixed with a slot;

[0056] (2) A connecting disc 12 is provided directly below the solid collector 6. A rotating shaft 11 is welded downwardly at the bottom of the center of the connecting disc 12. The rotating shaft 11 is fixed to the wall of the reactor 7 through a supporting rod 10. The rotating shaft 11 drives each solid channel 9 to rotate at a uniform speed through the connecting disc 12;

[0057] (3) The wall of the settler 3 is provided with a connection hole adapted to the regeneration inclined tube 1 of the feeder. The regeneration inclined tube 1 extends out of the wall of the settler 3 through the connection hole to connect to the regenerator. The lower agent port 2 is provided at the center of the settler 3. The catalyst solid particles are transported from the regenerator to the bottom of the lower agent port 2 through the regeneration inclined tube 1 by conveying air and fall onto the solid distributor 8.

[0058] (4) After falling from the lower agent port 2, the catalyst solid particles are collected by the solid collector 6. Under the action of the set inclination angle, the catalyst solid particles quickly tilt and slide to the bottom outlet of the solid collector 6, and then fall on the connecting disc 12 and continue to slide to the solid channel 9. Since the inclination angle of the solid channel 9 is smaller than the repose angle of the particles, the solid particles can be evenly distributed on the entire solid channel 9, which not only ensures the amount of falling particles, but also avoids the accumulation of particles inside. The particles fall through the circular hole and are evenly distributed in the entire reactor 7 by the rotation of the solid channel 9;

[0059] (5) The pressure difference between the settler 3 and the reactor 7 caused by the transportation of solid particles is balanced through the air duct 5, so that there is no particle accumulation above the solid distributor 8 and the particles fall smoothly and stably, thereby achieving steady-state long-term operation of the reaction.

[0060] During the experiment, the structure of the regeneration inclined tube 1 and the lower agent port 2 can make the catalyst particles transported to the reactor 7 symmetrically distributed; the air guide pipe 5 can realize the transmission of countercurrent wind from the upper and lower sides of the solid distributor 8, there is no particle accumulation above the solid distributor 8, and the particles fall smoothly and stably; thereby achieving steady-state long-term operation of the entire circulating countercurrent bed reaction.

[0061] In the cold state embodiment, the particle concentration at seven radial positions at each axial height in the reactor is measured by an optical fiber concentration tester to reflect the particle concentration distribution in the reactor. The main explanations are: (1) the effect of whether the solid channel 9 rotates or not on the inner diameter distribution density of the reactor 7; (2) the improvement effect of the installation of the solid distributor 8 on the "ring-core" uneven flow in the inner radial direction of the reactor 7.

[0062] The hot state example uses a hot state device to catalytically crack waste plastics at high temperature to explore the distribution of waste plastic catalytic cracking products before and after the installation of a rotating distributor system, and then explains the effect of the installation of a rotating distributor system on mass transfer, heat transfer and reaction efficiency in a circulating countercurrent bed reactor.

[0063] Example 1.

[0064] This embodiment includes two groups of cases, an experimental group and a control group, both of which are carried out in a cold circulating countercurrent bed device, wherein the rotating shaft 11 of the experimental group rotates at 6 rev / min, and the rotating shaft 11 of the control group remains stationary.

[0065] The solid distributor 8 of the present invention is used in both experiments. The countercurrent gas velocity in the reactor 7 is controlled to be 0.8 m / s, and the particle circulation rate is 46.22 kg / (m 2 •s), the solid concentration at each radial position is measured by an optical fiber concentration tester, and the solid concentration at different radial positions in the SN direction of the countercurrent section of the reactor 7 is measured respectively (expressed as solid volume fraction, which will not be repeated below). The radial position is expressed by dimensionless radial r / R, where r / R=0 at the center and r / R=1 at the side wall. Figure 6 The axial height Z is 70mm, Figure 7 The experimental results of the solid phase concentration in the SN direction measured in the radial direction are shown in Figure 8 As shown, the experimental results of solid concentration when the SN direction is offset by 30° are shown in Fig. 9 The experimental results of solid phase concentration with SN direction offset by 60° are shown in Fig.10 shown.

[0066] like Figure 8As shown, in the SN direction, the overall distribution of solids in the experimental group and the control group is not much different. The control group has a certain ring-core flow distribution, where the maximum deviation on both sides of the experimental group is -7%~+5% compared with the center, and the maximum deviation on both sides of the control group is -20%~+26% compared with the center. The maximum deviation on both sides of the experimental group is compared with the center. The deviation maintains a small deviation of -7%~5%. Fig. 9 , Fig.10 In the experiment group, the deviation is still small, ranging from -7% to 5%, but the solid distribution of the control group in these two directions fluctuates up and down, with no regular pattern. Through the above case analysis, the rotation of the solid channel 9 directly determines the uniformity of the solid particles on the radial surface. When it is not rotating, there are no circular holes outside the vertical projection of the solid channel 9, which results in the solid particles not being able to cover this area by gravity, but only by the disturbance of the cold reactor during operation to cause the flow to cover this area. This results in the movement of the solid particles being controlled on the solid distributor 8, but out of control inside the reactor 7. This shows that the rotation of the solid channel 9 can achieve uniform coverage of the solid particles on the radial surface.

[0067] Example 2.

[0068] This embodiment includes two groups of cases, an experimental group and a control group, both of which are carried out in a cold circulating countercurrent bed device, wherein the experimental group includes all structures of the solid distributor 8, the feeder and the air duct 5, and the rotating shaft 11 rotates at 6 rev / min, while the control group does not install the solid distributor 8.

[0069] The solid distributor 8 of the present invention is used in both experiments. The countercurrent gas velocity in the reactor is controlled to be 0.8 m / s, and the particle circulation rate is 45.25 kg / (m 2 •s), the solid concentration at each radial position is measured by an optical fiber concentration tester, and the solid concentration at different radial positions in the EW direction of the reactor countercurrent section is measured respectively (expressed as solid volume fraction, which will not be repeated below). The radial position is expressed by dimensionless radial r / R, where r / R=0 at the center and r / R=1 at the side wall. Figure 6 Axial height Z is 180mm, Figure 7 The experimental results of solid phase concentration measured in radial EW direction are shown in Fig.11 shown.

[0070] like Fig.11As shown, by analyzing the data of the control group, it can be seen that when the solid distributor 8 is not set, the solid particles as a whole show the characteristics of low and uniform center concentration and high wall concentration. This is a typical "ring-core" flow distribution, where the maximum deviation on both sides of EW is -181%~+194% compared to the deviation at the center. Analysis of the data of the experimental group shows that when the rotating solid distributor 8 is set, the overall deviation of the solid particles is significantly reduced, where the maximum deviation is -6%~+5% compared to the deviation at the center, and the degree of deviation is reduced by about 97% compared to when the solid distributor 8 is not set. Through the above case analysis, the rotating solid distributor 8 of the present invention plays a key role in achieving uniform radial distribution of solid particles, can significantly improve the "ring-core" flow of solids in the reactor, and improve the efficient mass transfer and heat transfer between solid particles and countercurrent gas.

[0071] Example 3.

[0072] This embodiment includes two groups of cases, namely the experimental group and the control group. Both experiments were conducted in a waste plastic cracking circulating countercurrent bed hot state device, the circulating countercurrent bed hot state device and the cold state device have the same size, the lower agent port 2 both adopts a blind end with an annular partition structure, and both are provided with an air guide pipe 5.

[0073] In this implementation case, the experimental group was equipped with a solid distributor 8, and the control group was not equipped with a solid distributor 8. The hot state experimental feed was domestic waste plastics, the feed rate was 1.8 kg / h, the agent-to-material ratio was 36.71, the reaction temperature was 560 °C, the reaction pressure was 55 kPa, and the circulating countercurrent bed operation time was 2 h. The experimental results are shown in Table 1.

[0074] Table 1 Example 3 - Comparison of product distribution between hot state experiment without solid distributor and with solid distributor

[0075] Whether to install a solid distributor Gas phase product yield, % Liquid product yield, % Coke yield, % Not installed 40.5 38.7 20.7 Retrofit 79.5 18.3 2.2

[0076] It can be seen from the data in Table 1 that the yield of gas phase products in the waste plastic cracking products with the rotating solid distributor 8 is higher than that without the solid distributor 8, the yield of liquid phase products is lower, and the yield of coke is significantly lowered. The gas phase products in the products are mostly small molecular hydrocarbons, and the liquid phase products are mostly large molecular hydrocarbons. The energy required to crack the waste plastic into small molecular hydrocarbons is higher.

[0077] By adding the solid distributor 8, the gas phase product yield is increased and the liquid phase product yield is reduced, indicating that the waste plastics obtain higher external energy in the reactor 7, which means that the solid particles are simultaneously used as heat sources and catalysts. Under the action of the solid distributor 8, the distribution is more uniform, and the mass and heat transfer in contact with the gas phase is more sufficient. Through the above case analysis, the solid distributor 8 of the present invention can improve the gas-solid flow and heat transfer effect in the circulating countercurrent bed reactor by improving the distribution of radial particle concentration. The uniform particle concentration distribution improves the heat transfer efficiency. The good heat transfer effect can improve the gas phase product yield and reduce the coke yield.

[0078] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A rotary distributor system for a circulating countercurrent bed reactor, comprising a settler, a reactor, a feeder, and an air guide pipe, wherein the settler is connected to the reactor by an inclined gentle slope, and the feeder comprises a regeneration inclined pipe and a lower agent port, characterized in that: The rotary distributor system also includes a rotatable solid distributor; The solid distributor comprises a solid collector, a connecting disc, a solid channel and a rotating shaft. The solid collector is a funnel structure, and the opening at the top thereof is directly opposite to the lower agent port. The solid collector is fixed at the center of the settler and the reactor through an annular support and a horizontal support. A connecting disc is arranged directly below the solid collector, and a solid channel is arranged at the outer edge of the connecting disc. The solid channel is a rectangular straight-through pipe, which is connected to the connecting disc, and the end of the connecting disc extends to the reactor wall. Circular holes are evenly arranged on the connecting disc and the solid channel. The center of the bottom of the connecting disc is connected to a vertical rotating shaft, and the rotating shaft is connected to the reactor wall through a supporting rod for fixing. The rotating shaft rotates under the drive of a motor, and the rotating shaft drives the connecting disc and the solid channel to rotate. The inclination angle of the side wall of the solid collector is greater than the repose angle of the solid particles used, and the inclination angle is 1 to 10 degrees higher than the repose angle. The connecting disc is provided with a circular hole pointing vertically downward, the connecting disc is a conical or arc-shaped disc surface, the inclination angle of the connecting disc is less than the repose angle of the solid particles used, and the inclination angle is 0.1 to 5 degrees less than the repose angle; The solid channels are provided with 4 to 8 pieces, which are sequentially arranged at the outer edge of the connecting disc. Each solid channel is provided with two side walls and a bottom end face, and the top end is open. The bottom end face thereof is evenly provided with circular holes vertically downward, and the side wall and the bottom end face are smoothly connected with a gentle slope surface; the inclination angle of each solid channel is complementary to the inclination angle of the side wall of the solid collector; the bottom end face of each solid channel is provided with equidistant circular holes with the same radius, and the opening rate is 30 to 50%; The air guide pipes are arranged in 4 to 8 pieces, which are evenly distributed at equal angles around the reactor and the settler outside the solid distributor; the top connection port of the air guide pipe is located on the settler wall above the lower agent port, and the bottom connection port is located on the reactor wall below the rotating shaft.

2. A rotary distributor system for a circulating countercurrent bed reactor according to claim 1, characterized in that: The annular support is fixed to the wall of the settler through a clamping groove, one end of the horizontal support is connected to the annular support, and the other end is connected to the outside of the solid collector.

3. A rotary distributor system for a circulating countercurrent bed reactor according to claim 1, characterized in that: The regeneration inclined tube is an inclined single tube structure, the angle between the regeneration inclined tube and the wall of the settler is 45°, the lower agent port is a T-shaped blind end structure, the opposite end of the blind end is connected to the regeneration inclined tube, the lower agent port is arranged on the central axis of the settler, and the regeneration inclined tube and the lower agent port are integrally formed.

4. A rotary distributor system for a circulating countercurrent bed reactor according to claim 1, characterized in that: The diameter of the connecting disk accounts for 10-15% of the diameter of the reactor, and circular holes with the same radius and equal distance are evenly arranged on the disk surface, and the opening rate is 10-20%.

5. The application method of the rotary distributor system of a circulating countercurrent bed reactor according to any one of claims 1 to 4, characterized in that: The steps include: (1) The solid collector is fixed by an annular support and a horizontal support, the annular support is close to the reactor wall and is fixed with a slot; (2) A connecting disc is arranged directly below the solid collector, and a rotating shaft is welded downward from the center of the connecting disc. The rotating shaft is fixed to the reactor wall through a supporting rod, and the rotating shaft drives each solid channel to rotate at a uniform speed through the connecting disc; (3) The wall of the settler is provided with a connection hole adapted to the regeneration inclined tube of the feeder. The regeneration inclined tube extends out of the wall of the settler through the connection hole to connect to the regenerator. The lower agent port is provided at the center of the settler. The catalyst solid particles are transported from the regenerator through the regeneration inclined tube to the bottom of the lower agent port and fall onto the solid distributor. (4) After falling from the lower port, the catalyst solid particles are collected by the solid collector. The catalyst solid particles quickly slide down to the bottom outlet of the solid collector, then fall on the connecting disc and continue to slide down to the solid channel. Under the action of rotation, they slide down along the solid channel and fall evenly from the vertical circular hole into the reactor, completing uniform distribution in the entire reactor. (5) The settler and reactor balance the pressure difference caused by the transportation of solid particles through the air duct, so that there is no particle accumulation above the solid distributor and the particles fall smoothly and stably, thereby achieving steady-state long-term operation of the reaction.

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