Double fluidized bed type solid powder dispersing device

Abstract

The invention provides a double-fluidized-bed type solid powder dispersing device, and belongs to the technical field of solid powder disperse.The double-fluidized-bed type solid powder dispersing device comprises a feeding bin, a spiral feeding assembly, a double-fluidized-bed assembly, a gas conveying assembly, a spraying nozzle and an electromagnetic valve, the feeding bin is arranged on one side of the top of the dispersing device, and the spiral feeding assembly is arranged on the other side of the top of the dispersing device; the solid powder adding device is used for adding solid powder into the dispersing device; the spiral feeding assembly is connected to the bottom of the feeding bin and used for guaranteeing that the powder adding amount is uniform during rotation. The bottom of the spiral feeding assembly is connected with the double fluidized bed assembly; the double fluidized bed assembly comprises a flow adjusting pipe and a main dispersing pipe, and the top of the main dispersing pipe is in through connection with the jet nozzle; the problems that an existing solid powder dispersing device cannot automatically and accurately adjust the density and the flow in the using process, and fixed powder cannot be uniformly dispersed in a space where an operator difficultly enters can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid powder dispersion, and in particular relates to a double fluidized bed solid powder dispersion device. Background Art

[0002] Fixed powder spraying technology is primarily used in air treatment. By spraying solid powder into the air, it achieves disinfection, removes harmful gases, and settles harmful substances. Common applications of this technology include air purification, environmental protection, and public health and epidemic prevention. Once sprayed into the air, solid powder can purify the air and settle harmful substances through physical adsorption, chemical reactions, and substance capture. For example, the powder can chemically react with harmful gases in the air to reduce the concentration of toxic substances, or remove bacteria, viruses, and particulate matter from the air through physical adsorption. In the public health field, fixed powder spraying technology can be used to eliminate bacteria, viruses, and other microorganisms in the air. Common powder types include silver ion powder and zinc oxide powder, which have antibacterial, bactericidal, and disinfecting properties. Spraying these powders into the air can effectively reduce the spread of pathogens, especially in high-density environments such as hospitals, public transportation, and office buildings. Fixed powder spraying technology can control harmful gases in the air by leveraging the chemical reactivity or adsorption properties of the powder. For example, by spraying some specific chemical powders, they can react with harmful gases in the air and convert them into harmless substances, thereby purifying the air and reducing pollution.

[0003] Fixed powder spraying devices typically use a nozzle to evenly disperse powder particles into the air, creating a fine dust atomization. The spraying process generally requires ensuring uniform distribution of powder particles in the air to ensure coverage and effectiveness in the target area. To optimize dispersion, the equipment often utilizes efficient airflow control technology to ensure uniform powder distribution and sufficient contact with airborne pollutants. Powder size and morphology are critical factors in ensuring adequate airborne dispersion and effectiveness. Excessively large particles may cause rapid settling, preventing them from reaching the target area for airborne pollutants. Excessively high powder density can lead to unnecessary waste.

[0004] Existing solid powder dispersion devices are unable to accurately adjust the density and flow rate during use, and are unable to evenly disperse fixed powders in spaces that are difficult for operators to enter. Summary of the Invention

[0005] In view of this, the present invention provides a dual fluidized bed solid powder dispersion device, which can solve the problems that existing solid powder dispersion devices cannot accurately adjust the density and flow rate during use, and cannot evenly disperse fixed powder in spaces that are difficult for operators to enter.

[0006] The present invention is achieved in that: The present invention provides a dual-fluidized bed solid powder dispersion device, which includes a feed bin, a spiral feeding assembly, a dual fluidized bed assembly, a conveying gas assembly, a spray nozzle and a solenoid valve. The feed bin is arranged on the top side of the dispersion device and is used to add solid powder into the interior of the dispersion device; the bottom of the feed bin is connected to the spiral feeding assembly to ensure a uniform amount of powder added during rotation; the bottom of the spiral feeding assembly is connected to the dual fluidized bed assembly, and the dual fluidized bed assembly is used to disperse fixed powder; the dual fluidized bed assembly includes a regulating flow tube and a main dispersion tube, the top of the main dispersion tube is through-connected with the spray nozzle, and is used to spray out the dispersed fixed powder; the bottoms of the regulating flow tube and the main dispersion tube are both connected to the conveying gas assembly; the conveying gas assembly is connected to the solenoid valve, and the solenoid valve is a three-way structure, which is used to increase the dynamic adjustment range of the flow inside the dual fluidized bed assembly.

[0007] The technical effects of a dual fluidized bed solid powder dispersion device provided by the present invention are as follows: the feed bin is located on the top side of the device, and its function is to provide solid powder into the entire device as raw material for subsequent processing.

[0008] The main function of the screw feed assembly is to transport the powder down. The bottom of the screw feed assembly is connected to the dual fluidized bed assembly to ensure that the particle size is suitable for dispersion processing.

[0009] The dual fluidized bed assembly is the core component of this device, primarily used to disperse powders through airflow. It consists of a flow control tube and a main dispersion tube. The flow control tube adjusts the airflow rate and dispersion effect by adjusting the flow rate, thereby controlling the powder dispersion process. The top of the main dispersion tube is connected to a spray nozzle, which ejects the dispersed powder. This nozzle further disperses the evenly dispersed powder, preventing particle aggregation and ensuring uniform powder distribution.

[0010] The spray nozzle is connected to the top of the main dispersion tube and is designed to spray the dispersed powder into the atmosphere for subsequent processing or use. The presence of the spray nozzle ensures efficient powder output and can adjust the spray effect according to the changes in gas flow rate.

[0011] The gas delivery assembly uses gas flow to propel the powder through the device, aiding in the dispersion of the powder within the dual fluidized bed assembly. It includes a metering gas pump and a regulating gas pump, each designed to provide a stable gas flow. The gas flow rate is dynamically adjusted by adjusting the gas pump. This allows precise adjustment of the gas flow rate to ensure optimal dispersion.

[0012] The solenoid valve controls the on / off flow of gas, primarily used to adjust the amount of gas delivered. The solenoid valve's three-way structure allows for airflow adjustment based on varying needs. This is crucial for enhancing the dynamic range of flow regulation, ensuring accurate gas delivery and, consequently, evenly dispersing the powder.

[0013] On the basis of the above technical solution, the dual fluidized bed solid powder dispersion device of the present invention can also be improved as follows: Wherein, the regulating flow tube and the main dispersion tube are connected at the top position through a through pipe.

[0014] Furthermore, the top of the regulating flow tube is through-connected with the spiral feeding assembly, and an inner tube is provided inside the inner tube, which is an unequal diameter tube; the unequal diameter tube is divided into two parts, namely the cylindrical structure of the main body and the inverted frustum structure provided at the bottom, and the diameter of the bottom of the inverted frustum structure is half of the inner diameter of the middle position of the regulating flow tube, which is used to allow the powder to move downward, avoid the powder being adsorbed together and only the middle part being transmitted downward, and increase the efficiency of the spiral feeding; a fluidizing plate is provided at the bottom position of the regulating flow tube.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are: adjusting the unequal diameter tubes set inside the flow tube, allowing the powder to move downward through the inverted cone structure, avoiding the powder being adsorbed together and only the middle part being transmitted downward, thereby increasing the efficiency of spiral feeding.

[0016] Furthermore, a cylindrical inner tube is provided inside the main dispersion tube, and a porous fluidizing sheet is provided at the bottom of the inner tube.

[0017] The benefits of this improved solution include: a cylindrical inner tube with porous fluidizing blades within the main dispersion tube promotes uniform gas flow, thereby better dispersing the powder. This design ensures a more refined airflow distribution and optimizes the flow pattern.

[0018] Furthermore, the gas delivery component includes a quantitative gas delivery pump and a regulating gas delivery pump. The quantitative gas delivery pump is through-connected to the bottom of the main dispersion pipe, and is used to deliver a quantitative amount of gas to the interior of the main dispersion pipe; the regulating gas delivery pump is through-connected to the bottom of the regulating flow tube, and is used to dynamically adjust the amount of gas delivered inside the regulating flow tube; the gas delivery pipe of the regulating gas delivery pump is through-connected to the solenoid valve, and the solenoid valve is used to adjust the amount of gas delivered by the regulating gas delivery pump by switching different valves of the three-way valve, thereby increasing the dynamic range of the amount of gas delivered by the regulating gas delivery pump and ensuring the accuracy of flow regulation.

[0019] The benefits of this improved solution include: by combining a quantitative and adjustable air pump design, the gas flow can be precisely controlled, ensuring that the gas flow rate can be adjusted in real time based on the powder type and dispersion requirements. The solenoid valve controls the precise switching of the air flow rate, increasing the adjustment range.

[0020] Furthermore, the solenoid valve includes a first branch pipe and a second branch pipe, the first branch pipe is connected to the bottom of the regulating flow tube, and the second branch pipe is connected to the outside world. A valve is fixed on the second branch pipe, which is used to adjust the flow of gas delivered by the regulating gas pump by switching the valve.

[0021] Furthermore, the top of the inner tube of the main dispersion tube is set to a spiral structure, which is used to increase the centrifugal force of the gas passing through the top position of the main dispersion tube, so that solid powder with small particle size enters the injection nozzle and is sprayed to the outside, and fixed powder with large particle size passes through the through tube into the interior of the regulating flow tube for redispersion.

[0022] The beneficial effect of adopting the above-mentioned improvement scheme is that the spiral structure at the top of the main dispersion tube helps to disperse the solid powder with smaller particle size and eject it by enhancing the centrifugal force when the gas flows through this position, while the powder with larger particle size will enter the regulating flow tube through the through pipe and be dispersed again.

[0023] Furthermore, the spiral feeding assembly includes an external drive assembly, a dispersion bin and a spiral shaft. The external drive assembly is arranged on the outside of the uniform bin. The inner wall of the uniform bin is a funnel-shaped structure. The spiral shaft is arranged inside the uniform bin. The structure is spiral and uniform serrations are provided on its side wall. The spiral shaft is used to disperse the fixed powder entering the spiral feeding assembly from the feeding bin through the extrusion of the spiral shaft and the inside of the uniform bin to ensure uniform powder addition during rotation.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the spiral feeding assembly includes an external drive assembly, a dispersion bin and a spiral shaft, and the powder is squeezed through the spiral structure to prevent powder blockage.

[0025] Furthermore, the external drive assembly includes a driving gear, a transmission gear and a driven gear. The driving gear is arranged on the outside of the dispersion device, and the driven gear is sleeved on the outer wall of the dispersion bin. The outer wall of the dispersion bin is cylindrical. The transmission gear is arranged between the driving gear and the driven gear, and is used for the driven gear to rotate and drive the transmission gear to rotate, thereby driving the driving gear to rotate.

[0026] Furthermore, the maximum outer diameter of the driven gear is the same as the bottom diameter of the transmission gear, so as to avoid powder blockage while grinding, dispersing and fixing the powder.

[0027] The benefits of this improved solution are as follows: the external drive assembly drives the screw shaft through a gear transmission system, thereby dispersing the powder. This structure ensures that powder does not clog the equipment during the dispersion process, and enables continuous and efficient powder dispersion, ensuring uniform powder addition during rotation.

[0028] Compared with the prior art, the dual fluidized bed solid powder dispersion device provided by the present invention has the following beneficial effects: The feed hopper, located at the top of the unit, is used to add solid powder to the entire unit. This design ensures a continuous supply of powder, ensuring a stable dispersion feeding process. Powder flows freely into downstream components through gravity.

[0029] The screw feed assembly is located below the feed bin and is used to transport the powder down.

[0030] The dual fluidized bed assembly, located below the spiral feed assembly, disperses the dispersed solid powder, ensuring uniform distribution of the powder within the airflow. It consists of a regulating flow tube and a main dispersion tube, which enhance powder dispersion by regulating the airflow. The flow tube and dispersion tube are connected by a through-tube, ensuring smooth flow of air and powder. This dual fluidized bed design effectively prevents powder agglomeration and enhances dispersion.

[0031] The spray nozzle, connected to the main dispersion pipe, ejects the dispersed solid powder into the atmosphere. The nozzle's design allows for tailored spraying based on variations in powder particle size, ensuring the appropriate velocity and direction for precise dispersion. The solenoid valve, a three-way valve, regulates airflow within the dual fluidized bed assembly. Dynamically adjusting the airflow ensures airflow stability and precision during the dispersion process, enhancing the device's flexibility and responsiveness.

[0032] The design of the flow regulating tube includes a built-in unequal diameter tube, which allows the powder to flow downward through the inverted cone structure, avoiding the powder being adsorbed together and only the middle part being transmitted downward, thereby increasing the efficiency of the spiral feeding.

[0033] Inside the main dispersion tube, a cylindrical inner tube with a porous fluidizing blade at the bottom ensures uniform airflow, thus preventing powder aggregation. The top of the main dispersion tube inner tube is designed with a spiral structure to increase the centrifugal force of the gas flow, making it easier for fine powder to enter the injection nozzle.

[0034] The gas delivery components include a quantitative gas delivery pump and a regulating gas delivery pump. The quantitative gas delivery pump is responsible for delivering a certain amount of gas to the main dispersion pipe to ensure the stability of the gas supply; the regulating gas delivery pump dynamically adjusts the gas flow rate. Through the cooperation of the solenoid valve, the gas flow rate can adapt to different working conditions, thereby enhancing the flexibility of the entire system.

[0035] The external drive assembly, through the cooperation of the driving gear, transmission gear, and driven gear, provides power to drive the spiral shaft to rotate, driving the powder in the dispersion chamber for uniform dispersion. The gear structure ensures the continuity and stability of the dispersion feeding process, and avoids gear jams that affect the powder dispersion effect.

[0036] Fluidizing sheets are provided at the bottom of the regulating flow tube and the main dispersion tube. The function of these fluidizing sheets is to optimize the flow pattern of the airflow inside the pipe, ensure the stability of the airflow and improve the contact efficiency between the airflow and the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a double fluidized bed solid powder dispersion device; Figure 2 It is a structural schematic diagram of the bottom of the dual fluidized bed assembly; Figure 3 It is a structural schematic diagram of the spiral feed component; In the accompanying drawings, the components represented by the reference numerals are as follows: 10. Feed bin; 20. Screw feed assembly; 21. External drive assembly; 211. Driving gear; 212. Transmission gear; 213. Driven gear; 22. Dispersion bin; 23. Screw shaft; 30. Dual fluidized bed assembly; 31. Flow regulating tube; 32. Main dispersion pipe; 40. Gas delivery assembly; 50. Injection nozzle; 60. Solenoid valve. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] like Figure 1-3 As shown, an embodiment of a dual fluidized bed solid powder dispersion device provided by the present invention, in this embodiment, includes a feed bin 10, a spiral feeding assembly 20, a dual fluidized bed assembly 30, a conveying gas assembly 40, a spray nozzle 50 and a solenoid valve 60. The feed bin 10 is arranged on the top side of the dispersion device for adding solid powder into the interior of the dispersion device; the bottom of the feed bin 10 is connected to the spiral feeding assembly 20 for ensuring uniform powder addition during rotation; the bottom of the spiral feeding assembly 20 is connected to the dual fluidized bed assembly 30, and the dual fluidized bed assembly 30 is used to disperse fixed powder; the dual fluidized bed assembly 30 includes a regulating flow tube 31 and a main dispersion tube 32, the top of the main dispersion tube 32 is connected to the spray nozzle 50 for spraying out the dispersed fixed powder; the bottom of the regulating flow tube 31 and the main dispersion tube 32 are both connected to the conveying gas assembly 40; the conveying gas assembly 40 is connected to the solenoid valve 60, which is a three-way structure for increasing the dynamic adjustment range of the flow inside the dual fluidized bed assembly 30.

[0040] In the above technical solution, the regulating flow tube 31 and the main dispersion tube 32 are connected at the top position through a through pipe.

[0041] Furthermore, in the above technical solution, the top of the regulating flow tube 31 is connected to the spiral feeding assembly 20, and an inner tube is arranged inside the inner tube, which is an unequal diameter tube; the unequal diameter tube is divided into two parts, namely the cylindrical structure of the main body and the inverted frustum structure arranged at the bottom, and the diameter of the bottom of the inverted frustum structure is half of the inner diameter of the middle position of the regulating flow tube 31, which is used to allow the powder to go down, avoid the powder being adsorbed together and only the middle part being transmitted downward, and increase the efficiency of the spiral feeding; a fluidizing plate is arranged at the bottom position of the regulating flow tube 31.

[0042] Furthermore, in the above technical solution, an inner tube with a cylindrical structure is provided inside the main dispersion tube 32, and a porous fluidizing sheet is provided at the bottom of the inner tube.

[0043] Furthermore, in the above technical solution, the gas delivery component 40 includes a quantitative gas delivery pump and a regulating gas delivery pump. The quantitative gas delivery pump is through-connected to the bottom of the main dispersion pipe 32, and is used to deliver a quantitative amount of gas to the interior of the main dispersion pipe 32; the regulating gas delivery pump is through-connected to the bottom of the regulating flow tube 31, and is used to dynamically adjust the amount of gas delivered inside the regulating flow tube 31; the gas delivery pipe of the regulating gas delivery pump is through-connected to the solenoid valve 60, and the solenoid valve 60 is used to adjust the amount of gas delivered by the regulating gas delivery pump by switching different valves of the three-way valve, thereby increasing the dynamic range of the amount of gas delivered by the regulating gas delivery pump and ensuring the accuracy of flow regulation.

[0044] Furthermore, in the above technical solution, the solenoid valve 60 includes a first branch pipe and a second branch pipe. The first branch pipe is connected to the bottom of the regulating flow tube 31, and the second branch pipe is connected to the outside world. A valve is fixed on the second branch pipe, which is used to adjust the flow of gas delivered by the gas pump by switching the valve.

[0045] Furthermore, in the above technical solution, the top of the inner tube of the main dispersion tube 32 is set to a spiral structure, which is used to increase the centrifugal force of the gas passing through the top position of the main dispersion tube 32, so that solid powder with small particle size enters the injection nozzle 50 and is sprayed to the outside, and fixed powder with large particle size passes through the through tube into the interior of the regulating flow tube 31 for redispersion.

[0046] Furthermore, in the above technical solution, the spiral feeding assembly 20 includes an external driving assembly 21, a dispersion bin 22 and a spiral shaft 23. The external driving assembly 21 is arranged on the outside of the uniform bin 22. The inner wall of the uniform bin 22 is a funnel-shaped structure. The spiral shaft 23 is arranged inside the uniform bin 22. The structure is spiral and uniform serrations are provided on its side wall. The spiral shaft 23 is used to disperse the fixed powder entering the spiral feeding assembly 20 from the feeding bin 10 through the extrusion of the spiral shaft 23 and the inside of the uniform bin 22 to ensure that the amount of powder added is uniform during rotation.

[0047] Furthermore, in the above technical solution, the external drive assembly 21 includes a driving gear 211, a transmission gear 212 and a driven gear 213. The driving gear 211 is arranged on the outside of the dispersion device, and the driven gear 213 is sleeved on the outer wall of the dispersion bin 22. The outer wall of the dispersion bin 22 is cylindrical. The transmission gear 212 is arranged between the driving gear 211 and the driven gear 213, and is used for the driven gear 213 to rotate and drive the transmission gear 212 to rotate, thereby driving the driving gear 211 to rotate.

[0048] Furthermore, in the above technical solution, the maximum outer diameter of the driven gear 213 is the same as the bottom diameter of the transmission gear 212, so as to prevent the powder from being blocked while dispersing and fixing the powder.

[0049] Solid powder enters the device from the feed bin and flows into the spiral feed assembly below by gravity. This process ensures a continuous supply of powder and provides a stable raw material for subsequent dispersion.

[0050] After entering the spiral feed assembly, the solid powder is uniformly dispersed by forces applied within the spiral shaft and funnel-shaped dispersion chamber. During this process, the spiral shaft, powered by an external drive assembly, refines the powder to the desired particle size. This refinement process, through the transmission of external force, ensures that the powder achieves the desired particle size, preparing it for subsequent dispersion.

[0051] The dispersed powder is then fed into the dual fluidized bed assembly below for further dispersion. During this stage, gas enters through the regulating flow tube and the main dispersion tube. The interaction between the airflow and the powder ensures a uniform distribution of the powder within the airflow. The dual fluidized bed design effectively prevents powder agglomeration. The airflow is regulated through various pipes and structures, resulting in an ideal dispersion of the powder within the airflow.

[0052] After being dispersed in the dual fluidized bed, the powder is ejected into the environment through a spray nozzle. The nozzle controls the spray velocity and direction to ensure uniform distribution of the powder, adjusting the spray intensity and precision as needed. This spraying process ensures that the dispersed powder is delivered in an optimal manner to meet external requirements.

[0053] The solenoid valve and regulating flow tube dynamically adjust the airflow rate and pressure, ensuring airflow stability and flexibility during the dispersion process. The solenoid valve provides fine-tuning during the process, ensuring that the gas flow always meets the required requirements and adjusting the airflow according to different operating conditions to ensure efficient and stable dispersion.

[0054] The external drive assembly drives the spiral shaft through a gear structure to ensure a smooth dispersion process. The driving gear, transmission gear, and driven gear cooperate to transmit power, ensuring that the powder can be fully refined in the dispersion chamber, thereby improving the dispersion effect.

[0055] The main dispersion pipe is designed with a cylindrical inner tube and porous fluidizing blades to ensure uniform airflow. As the air flows through the pipe, the fluidizing blades help break up vortices, ensuring more uniform contact between the airflow and the powder, avoiding powder aggregation and incomplete dispersion.

[0056] Through the coordination of the quantitative gas supply pump and the regulating gas supply pump, the gas flow of the entire system remains stable and can be finely adjusted according to different working conditions, ensuring the accuracy of gas supply during the dispersion process, thereby improving the overall dispersion performance of the device.

[0057] Through the coordinated operation of multiple components, combined with airflow regulation, dispersion, and injection mechanisms, efficient refinement, uniform dispersion, and precise output of solid powders are achieved. Through precise power transmission, airflow regulation, and refinement design, the powder dispersion process is more stable, flexible, and efficient, meeting the dispersion requirements of powders of different particle sizes.

[0058] Specifically, the principle of the present invention is: when in use, the gas delivery component 40 continuously delivers gas to the regulating flow tube 31 and the main dispersion pipe 32, and adjusts the flow inside the regulating flow tube 31, and determines the density of the sprayed fixed powder according to the flow inside the regulating flow tube 31.

[0059] Fixed powder is added to the interior of the spiral feeding component 20 through the feeding bin 10, and the external driving component 21 drives the dispersion bin 22 to rotate to disperse the solid powder. The powder is added to the interior of the regulating flow tube 31 through the gap between the dispersion bin 22 and the spiral shaft 23, and the powder is dispersed by gas flow and the fluidizing sheet at the bottom. After dispersion, powder with a small particle size enters the interior of the main dispersion pipe 32 through the through pipe and is dispersed through the porous fluidizing sheet at the bottom.

[0060] The dispersed fixed powder enters the spray nozzle 50 through the airflow and is sprayed into the air.

[0061] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A double fluidized bed solid powder dispersion device, characterized in that: The invention comprises a feed bin (10), a spiral feed assembly (20), a dual fluidized bed assembly (30), a conveying gas assembly (40), a spray nozzle (50) and a solenoid valve (60), wherein the feed bin (10) is arranged on one side of the top of the dispersion device and is used to add solid powder into the dispersion device; the bottom of the feed bin (10) is connected to the spiral feed assembly (20) and is used to ensure that the amount of powder added during rotation is uniform; the bottom of the spiral feed assembly (20) is connected to the dual fluidized bed assembly (30), and the dual fluidized bed assembly (30) is used to fix the powder. The double fluidized bed assembly (30) includes a regulating flow tube (31) and a main dispersion tube (32), the top of the main dispersion tube (32) is connected to the injection nozzle (50) for spraying the dispersed fixed powder; the bottoms of the regulating flow tube (31) and the main dispersion tube (32) are both connected to the conveying gas assembly (40); the conveying gas assembly (40) is connected to the solenoid valve (60), and the solenoid valve (60) is a three-way structure for increasing the dynamic adjustment range of the flow rate inside the double fluidized bed assembly (30).

2. A dual fluidized bed solid powder dispersion device according to claim 1, characterized in that: The regulating flow tube (31) and the main dispersion tube (32) are connected at the top position via a through pipe.

3. A dual fluidized bed solid powder dispersion device according to claim 2, characterized in that: The top of the regulating flow tube (31) is connected to the spiral feeding assembly (20), and an inner tube is arranged inside the regulating flow tube, and the inner tube is an unequal diameter tube; the unequal diameter tube is divided into two parts, namely a cylindrical structure of the main body and an inverted frustum structure arranged at the bottom, and the diameter of the bottom of the inverted frustum structure is half of the inner diameter of the middle position of the regulating flow tube (31), which is used to allow the powder to move downward, avoid the powder being adsorbed together and only the middle part being transmitted downward, and increase the efficiency of the spiral feeding; a fluidizing sheet is arranged at the bottom position of the regulating flow tube (31).

4. A dual fluidized bed solid powder dispersion device according to claim 3, characterized in that: The main dispersion pipe (32) is provided with an inner pipe of cylindrical structure inside, and a porous fluidizing sheet is provided at the bottom of the inner pipe.

5. A dual fluidized bed solid powder dispersion device according to claim 4, characterized in that: The gas delivery component (40) includes a quantitative gas delivery pump and a regulating gas delivery pump. The quantitative gas delivery pump is connected to the bottom of the main dispersion pipe (32) and is used to deliver a quantitative amount of gas to the inside of the main dispersion pipe (32); the regulating gas delivery pump is connected to the bottom of the regulating flow pipe (31) and is used to dynamically adjust the amount of gas delivered inside the regulating flow pipe (31); the gas delivery pipe of the regulating gas delivery pump is connected to the solenoid valve (60), and the solenoid valve (60) is used to adjust the amount of gas delivered by the regulating gas delivery pump by switching different valves of the three-way valve, thereby increasing the dynamic range of the amount of gas delivered by the regulating gas delivery pump and ensuring the accuracy of flow regulation.

6. A dual fluidized bed solid powder dispersion device according to claim 5, characterized in that: The solenoid valve (60) includes a first branch pipe and a second branch pipe, wherein the first branch pipe is connected to the bottom of the regulating flow tube (31), and the second branch pipe is connected to the outside, and a valve is fixed on the second branch pipe for regulating the flow of gas delivered by the regulating gas delivery pump by opening and closing the valve.

7. A dual fluidized bed solid powder dispersion device according to claim 6, characterized in that: The top of the inner tube of the main dispersion tube (32) is configured as a spiral structure, which is used to increase the centrifugal force of the gas passing through the top position of the main dispersion tube (32), so that solid powder with a small particle size enters the injection nozzle (50) and is injected to the outside, and fixed powder with a large particle size passes through the through tube and enters the interior of the regulating flow tube (31) for redispersion.

8. The double fluidized bed solid powder dispersion device according to claim 7, characterized in that: The spiral feeding assembly (20) comprises an external driving assembly (21), a dispersion bin (22) and a spiral shaft (23), wherein the external driving assembly (21) is arranged outside the uniform bin (22), the inner wall of the uniform bin (22) is a funnel-like structure, and the spiral shaft (23) is arranged inside the uniform bin (22), and has a spiral structure. Uniform saw teeth are provided on its side wall, and are used to disperse the fixed powder entering the interior of the spiral feeding assembly (20) from the feeding bin (10) through the extrusion between the spiral shaft (23) and the interior of the uniform bin (22), thereby ensuring that the amount of powder added is uniform during rotation.

9. The double fluidized bed solid powder dispersion device according to claim 8, characterized in that: The external drive assembly (21) comprises a driving gear (211), a transmission gear (212) and a driven gear (213); the driving gear (211) is arranged outside the dispersion device; the driven gear (213) is sleeved on the outer wall of the dispersion bin (22); the outer wall of the dispersion bin (22) is cylindrical; the transmission gear (212) is arranged between the driving gear (211) and the driven gear (213), and is used for the driven gear (213) to rotate and drive the transmission gear (212) to rotate, thereby driving the driving gear (211) to rotate.

10. The double fluidized bed solid powder dispersion device according to claim 9, characterized in that: The maximum outer diameter of the driven gear (213) is the same as the bottom diameter of the transmission gear (212), and is used to prevent powder from being blocked while dispersing and fixing the powder.

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