Split type fluidized bed jet mill

Abstract

The utility model relates to a split type fluidized bed jet mill which comprises a jet milling device, the jet milling device comprises a first barrel and at least one pair of powder spray pipes, and inlets in the outer ends of the powder spray pipes are connected with a first Venturi powder pump; the powder classifier comprises a second barrel and a powder classification unit, a new powder channel, a coarse powder channel and a fine powder channel are formed in the second barrel, the fine powder channel is connected with the air draft system and an outlet of the powder classification unit, the coarse powder channel is connected with the first Venturi powder pumps, and the fine powder channel is connected with the second Venturi powder pumps. The new powder channel is connected with a powder outlet of the first barrel; and the powder supply device is connected with the second barrel body and is suitable for inputting new powder into the second barrel body. The powder of the jet mill is crushed and classified into two independent devices, so that the production and manufacturing difficulty of the jet mill is reduced, later transportation, disassembly, assembly and maintenance are also facilitated, the crushing efficiency is improved, and the particle size of the powder is effectively controlled.

Description

Technical Field

[0001] The utility model relates to the field of powder making equipment, in particular to a split-type fluidized bed air flow mill. Background Art

[0002] There are many types of air jet mills, the main type is the collision air jet mill. Up to now, the fluidized bed air jet mill is generally recognized as the best and most common type of air jet mill.

[0003] The traditional fluidized bed jet mill mainly includes a powder crushing module and a powder separation module. In the past, these two modules were installed on a cylinder, and the cylinder as a whole would be made relatively tall. In addition, the powder crushing module uses high-pressure airflow ejected from the nozzle to drive the powder in the cylinder to collide, and the powder crushing efficiency is not high. Secondly, no matter coarse powder or fine powder, there is a chance that it will be driven to collide and crush again, causing the powder that has been crushed to the required fineness to be further crushed. The powder particle size cannot be controlled, and fine powder with an undesirable particle size distribution is obtained. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a split fluidized bed airflow mill to solve the problems of the previous integrated fluidized bed airflow mill, such as the inconvenience of manufacturing and maintenance, low powder making efficiency and wide particle size distribution.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Provided is a split fluidized bed air jet mill, comprising

[0007] An airflow pulverizing device comprises a first barrel and at least a pair of powder nozzles, the powder nozzles being mounted on the first barrel, the powder nozzle outlets being arranged opposite each other within the first barrel, the outer inlets of the powder nozzles being connected to a first Venturi powder pump, and a powder outlet being provided at the lower end of the first barrel;

[0008] A powder classifier comprising a second cylinder and a powder classifying unit, the powder classifying unit being mounted in the second cylinder and adapted to classify powder, the second cylinder being provided with a fresh powder channel, a coarse powder channel, and a fine powder channel, the fine powder channels being connected to an exhaust system and an outlet of the powder classifying unit, respectively, the coarse powder channels being connected to respective first Venturi powder pumps, and the fresh powder channels being connected to a powder outlet of the first cylinder;

[0009] The powder supply device is connected to the second barrel and is suitable for inputting new powder into the second barrel.

[0010] Furthermore, the powder supply device adopts a Venturi powder pump, i.e., a second Venturi powder pump;

[0011] The second venturi powder pump is connected to the second cylinder through the new powder channel.

[0012] Furthermore, the new powder channel and the coarse powder channel are tangentially connected to the second cylinder.

[0013] Furthermore, the coarse powder channel is connected to the upper side wall of the second cylinder and is located next to the powder classification unit;

[0014] The new powder channel is connected to the lower side wall of the second cylinder.

[0015] Furthermore, the lower portion of the first cylinder is a conical cylinder structure.

[0016] Furthermore, the powder classification unit and the fine powder channel are both located at the center of the upper end of the second cylinder.

[0017] Furthermore, the powder feeding device adopts a screw feeder.

[0018] Furthermore, the powder classification unit includes a motor and a powder classification impeller.

[0019] The beneficial effects of the utility model are:

[0020] By making the powder crushing and powder grading of the air jet mill into two independent devices, the difficulty of manufacturing the air jet mill is reduced, and it is also convenient for subsequent transportation, disassembly and maintenance.

[0021] By controlling the speed of the powder grading impeller through the motor, the particle size of the fine powder screened out can be accurately controlled and collected. The remaining coarse powder is recovered through the coarse powder channel and injected into the first cylinder through the first Venturi powder pump and powder nozzle for collision crushing. When the coarse powder enters the first cylinder, it enters together with the high-pressure airflow. This powder collision is more targeted, directly hitting the coarse powder, improving the powder crushing efficiency, and effectively controlling the powder particle size.

[0022] The new powder channel connected to the powder classifier is designed in a tangential direction. Therefore, the process of new powder entering can drive the powder to rotate inside, which is more conducive to the separation of coarse and fine powders. The coarse powder is discharged from the coarse powder channel along the inner wall, and the fine powder remains in the center and is discharged from the fine powder channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the split-type fluidized bed airflow mill of the utility model;

[0025] Figure 2 is a schematic diagram of a powder classifier;

[0026] in,

[0027] 1. air flow pulverizing device, 11. first cylinder, 12. powder nozzle, 13. first venturi powder pump;

[0028] 2. Powder classifier, 21. Second cylinder, 22. Second Venturi powder pump;

[0029] 3. Powder classification unit, 31. Motor, 32. Powder classification impeller;

[0030] 41. New powder channel, 42. Coarse powder channel, 43. Fine powder channel. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] This application provides a split-type fluidized bed jet mill, which is described in detail below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the description of each embodiment has its own emphasis. For portions not detailed in one embodiment, please refer to the relevant descriptions of other embodiments.

[0033] To address the technical issues of the prior art, such as the inconvenience of manufacturing and maintenance of integrated fluidized bed jet mills, as well as their low milling efficiency, an embodiment of the present application provides a split fluidized bed jet mill, which is described in detail below.

[0034] like Figure 1 and Figure 2 As shown, a split fluidized bed jet mill includes

[0035] The airflow pulverizing device 1 comprises a first barrel 11 and a pair of powder nozzles 12. The powder nozzles 12 are mounted on the first barrel 11. The outlets of the powder nozzles 12 are arranged opposite to each other within the first barrel 11. The inlets at the outer ends of the powder nozzles 12 are connected to a first Venturi powder pump 13. A powder outlet is provided at the lower end of the first barrel 11.

[0036] like Figure 1 As shown, the first barrel 11 is cylindrical with a cone at the lower end. The lower end of the cone is the powder outlet. The powder nozzle 12 is installed at the upper end of the first barrel 11. The coarse powder collides with the upper end of the first barrel 11 and falls into the powder outlet below.

[0037] like Figure 2As shown, the powder classifier 2 includes a second barrel 21 and a powder classification unit 3. The powder classification unit 3 is installed in the second barrel 21 and is suitable for classifying powder. The second barrel 21 is provided with a new powder channel 41, a coarse powder channel 42, and a fine powder channel 43. The fine powder channel 43 is respectively connected to the exhaust system and the outlet of the powder classification unit 3. The coarse powder channel 42 is respectively connected to each first Venturi powder pump 13. The new powder channel 41 is connected to the powder outlet of the first barrel 11.

[0038] The second cylinder 21 is a cylindrical structure. The coarse powder channel 42 is connected to the upper side wall of the second cylinder 21 and is located next to the powder classification unit 3. The new powder channel 41 is connected to the lower side wall of the second cylinder 21, and the fine powder channel 43 is connected to the middle of the upper end of the second cylinder 21.

[0039] The powder classification unit 3 includes a motor 31 and a powder classification impeller 32. The motor 31 extends into the second cylinder 21 through the fine powder channel 43, and then the motor 31 shaft is connected to the powder classification impeller 32.

[0040] Specifically, as an optional implementation in this embodiment, Figure 1 and Figure 2 As shown, the new powder channel 41 and the coarse powder channel 42 are tangentially connected to the second cylinder 21 .

[0041] By arranging the new powder channel 41 and the coarse powder channel 42 tangentially on the second cylinder 21, the new powder can drive the powder in the cylinder to rotate circumferentially when it is input into the second cylinder 21, which is conducive to powder separation. The separated coarse powder sticks to the inner wall and is more conducive to being discharged from the coarse powder channel 42. The fine powder is in the center position, which also helps the fine powder to enter the fine powder channel 43.

[0042] Powder supply device, such as Figure 1 As shown, the powder feeding device is connected to the second barrel 21 and is suitable for inputting new powder into the second barrel 21.

[0043] Specifically, in this embodiment, the powder supply device adopts a Venturi powder pump, that is, the second Venturi powder pump 22;

[0044] The second venturi powder pump 22 is connected to the second cylinder 21 through the new powder channel 41 .

[0045] The front end of the second Venturi powder pump 22 is connected to a pipeline and cooperates with the new powder channel 41 through the pipeline.

[0046] As another embodiment of a powder feeding device, a screw feeder can also be used. A screw feeder allows for gradual separation of powder through a feeding screw, with negative pressure allowing the powder to enter the new powder channel 41 and the second barrel 21. Compared to a screw feeder, the second Venturi powder pump 22 has the advantage of rotating the powder within the barrel as it is fed, further facilitating coarse and fine powder separation.

[0047] In the split-type fluidized bed air flow mill of the utility model, the air flow pulverizing device 1 and the powder classifier 2 are two independent devices, which are connected by a pipeline, which is convenient for production and processing. The split type is also convenient for transportation. After arriving at the site, they can be directly connected by pipelines and assembled into a air flow mill.

[0048] The fluidized bed air flow mill operates by controlling the rotation speed of the powder classification impeller 32 through the motor 31, which can accurately control the particle size of the discharged fine powder to obtain the required fine powder, and then the coarse powder is collected separately and transported to the air flow crushing device 1. The collision of the coarse powder in the air flow crushing device 1 is carried out by the high-pressure air flow in the first Venturi powder pump 13 and then sprayed in. The high-pressure air flow speed output from the first Venturi powder pump 13 is usually supersonic, which directly allows the coarse powder and the coarse powder to collide at a supersonic speed. The crushed powder quality is very high, and the colliding powder is more targeted, avoiding the appearance of excessively fine fine powder.

[0049] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0050] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0051] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0053] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0054] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0055] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A split fluidized bed jet mill, characterized in that: include An air flow pulverizing device (1) comprises a first barrel (11) and at least one pair of powder nozzles (12), wherein the powder nozzles (12) are mounted on the first barrel (11), outlets of the powder nozzles (12) are arranged opposite to each other in the first barrel (11), inlet ports at outer ends of the powder nozzles (12) are connected to a first Venturi powder pump (13), and a powder outlet is provided at the lower end of the first barrel (11); A powder classifier (2) comprises a second barrel (21) and a powder classification unit (3), wherein the powder classification unit (3) is installed in the second barrel (21) and is suitable for classifying powder, wherein a new powder channel (41), a coarse powder channel (42) and a fine powder channel (43) are provided on the second barrel (21), wherein the fine powder channel (43) is respectively connected to an exhaust system and an outlet of the powder classification unit (3), the coarse powder channel (42) is respectively connected to each first venturi powder pump (13), and the new powder channel (41) is connected to a powder outlet of the first barrel (11); The powder supply device is connected to the second barrel (21) and is suitable for inputting new powder into the second barrel (21).

2. The split-type fluidized bed jet mill according to claim 1, characterized in that: The powder supply device adopts a Venturi powder pump, namely a second Venturi powder pump (22); The second Venturi powder pump (22) is connected to the second cylinder (21) through the new powder channel (41).

3. The split-type fluidized bed jet mill according to claim 2, characterized in that: The new powder channel (41) and the coarse powder channel (42) are tangentially connected to the second cylinder (21).

4. The split-type fluidized bed jet mill according to claim 3, characterized in that: The coarse powder channel (42) is connected to the upper side wall of the second cylinder (21) and is located next to the powder classification unit (3); The new powder channel (41) is connected to the lower side wall of the second cylinder (21).

5. The split-type fluidized bed jet mill according to claim 1, characterized in that: The lower part of the first cylinder (11) is a conical cylinder structure.

6. The split-type fluidized bed jet mill according to claim 1, characterized in that: The powder classification unit (3) and the fine powder channel (43) are both located at the center of the upper end of the second cylinder (21).

7. The split-type fluidized bed jet mill according to claim 1, characterized in that: The powder feeding device adopts a screw feeder.

8. The split-type fluidized bed jet mill according to claim 1, characterized in that: The powder classification unit (3) comprises a motor (31) and a powder classification impeller (32).

Images