Staged airflow dispersion device

Abstract

The utility model discloses a grading type airflow dispersing device which comprises a feeding device, an airflow classifier, a dust remover, an induced draft fan and a rack which are sequentially arranged, a coarse powder outlet of the airflow classifier is connected with a dispersing device, and a bottom outlet of the dispersing device is connected with a screening device; the dispersing device comprises a dispersing barrel and a gas conveying pipe, the upper end of the dispersing barrel is communicated with a coarse powder outlet of the airflow classifier, the gas conveying pipe is arranged around the outer side wall of the dispersing barrel, a plurality of gas conveying branch pipes are connected to the gas conveying pipe at equal intervals, and the other ends of the gas conveying branch pipes are connected with the outer wall of the dispersing barrel and communicated with the inner wall of the dispersing barrel; high-pressure gas is input into the gas inlet end of the gas conveying pipe from the outside; according to the utility model, the structure is compact, the design is novel, the entering material flow is uniform and stable, the purpose of improving the practicability is achieved, the powder entering the dispersing barrel is fully dispersed through high-pressure air flow, and the subsequent circular screening machine performs secondary screening on dispersed split bodies, so that the grading precision of the grading machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grading equipment, in particular to a grading type airflow dispersion device. Background Art

[0002] The classifier is a mechanical device used for particle size classification. It is widely used in the fields of mineral processing, powder making or sludge treatment plants. There are various modes of action of the classifier in the prior art. Among them, the airflow classifier is one of the important equipment in the powder manufacturing plant, especially for the preparation of calcium hydroxide powder. Generally, the powder enters the classifier after quicklime digestion to obtain powder that meets the requirements. The traditional single-stage airflow classifier is composed of a motor, a classifying wheel and a classifying cylinder. The effective classification of the material is achieved by adjusting the speed of the classifying wheel and matching it with a reasonable secondary air intake. However, this traditional airflow classifier has a wide range of particle size distribution after classification, and the powder after classification has low precision. It may exclude fine powder that meets the requirements along with large-particle powder, and the classification efficiency is low. With the development of the times, this wide range of powder can no longer meet the requirements of the times. Narrow-level fine powder is the basis for preparing structural and functional materials.

[0003] Secondly, the existing equipment has the problem of powder agglomeration during the alloy powder classification process. During the airflow classification process, alloy powder particles may agglomerate due to electrostatic effects, causing adhesion and aggregation between particles, resulting in uneven particle size distribution of the powder. Powder agglomeration affects the physical and chemical properties of the alloy material, and may also affect the normal operation of the equipment, increase the instability of the production process, and reduce work efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a hierarchical air flow dispersion device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a graded airflow dispersion device, comprising a feeding device, an airflow classifier, a dust collector, an induced draft fan and a frame arranged in sequence, the coarse powder outlet of the airflow classifier is connected to the dispersion device, and the bottom outlet of the dispersion device is connected to the screening device;

[0006] The dispersion device comprises a dispersion cylinder and an air delivery pipe, wherein the upper end of the dispersion cylinder is connected to the coarse powder outlet of the airflow classifier, the air delivery pipe is arranged around the outer wall of the dispersion cylinder, a plurality of air delivery branches are connected to the air delivery pipe at equal intervals, the other end of the air delivery branch is connected to the outer wall of the dispersion cylinder and is connected to the inner wall of the dispersion cylinder, and the air inlet end of the air delivery pipe is input with high-pressure gas from the outside;

[0007] The bottom of the dispersion cylinder is connected to a screening device and a control valve is provided at the connection. The screening device is used to vibrate and screen the discharged material again.

[0008] Furthermore, the feeding device includes a hopper, a metering hopper and a silo, which are installed on the frame from top to bottom in sequence. The bottom outlet of the hopper and the top inlet of the metering hopper are connected through a first screw feeder for feeding. The bottom of the metering hopper is connected to the silo through a hose and a control valve is provided at the bottom outlet of the metering hopper. The silo is connected to an airflow classifier.

[0009] Furthermore, the metering bucket and the frame are connected via a plurality of weighing sensors.

[0010] Furthermore, the silo is connected to the airflow classifier via a second screw feeder.

[0011] Furthermore, the screening device includes at least one circular screening machine, which includes a screen frame and a base. The screen frame is installed above the base, and the screen frame and the base are connected by a number of elastic supports. The screen frame is driven by a vibration motor, and three layers of sieve plates are arranged above the top of the screen frame, and a discharge pipe is arranged on the side end of each layer of the sieve plate; a dust cover is provided on the top of the topmost sieve plate, and the top of the dust cover is connected to the bottom outlet of the dispersion cylinder.

[0012] Furthermore, the dust cover inlet and the dispersion tube outlet are connected via a third screw feeder.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model has a compact structure and novel design. Through the design of the feeding device, it plays a role of facilitating the quantitative weighing of materials and makes the incoming material flow uniform and stable, thereby achieving the purpose of improving practicality. The powder entering the dispersion cylinder is fully dispersed by the high-pressure airflow, and the subsequent circular screen machine performs secondary screening on the dispersed parts, thereby improving the grading accuracy of the classifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a hierarchical airflow dispersion device of the utility model;

[0016] Figure 2 for Figure 1 A magnified image of point A;

[0017] Figure 3 for Figure 1 The enlarged view of point B;

[0018] In the figure, air flow classifier -1, dust collector -2, induced draft fan -3, frame -4, dispersion cylinder -5, air pipe -6, air branch pipe -7, hopper -8, quantitative hopper -9, silo -10, first screw feeder -11, weighing sensor -12, second screw feeder -13, screen frame -14, base -15, elastic support -16, vibration motor -17, screen plate -18, dust cover -19, third screw feeder -20. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1 As shown, a graded airflow dispersion device comprises a feeding device, an airflow classifier 1, a dust collector 2, an induced draft fan 3 and a frame 4 which are arranged in sequence, the coarse powder outlet of the airflow classifier 1 is connected to the dispersion device, and the bottom outlet of the dispersion device is connected to the screening device;

[0021] See also Figure 3 As shown, the dispersion device includes a dispersion cylinder 5 and an air pipe 6. The upper end of the dispersion cylinder 5 is connected to the coarse powder outlet of the airflow classifier 1. The air pipe 6 is arranged around the outer wall of the dispersion cylinder 5. A plurality of air branch pipes 7 are connected to the air pipe 6 at equal intervals. The other end of the air branch pipe is connected to the outer wall of the dispersion cylinder 5 and is connected to the inner wall of the dispersion cylinder 5. High-pressure gas is input from the outside to the air inlet end of the air pipe 6. The bottom of the dispersion cylinder 5 is connected to the screening device and a control valve is arranged at the connection.

[0022] See also Figure 1 and Figure 2 As shown, the feeding device includes a hopper 8, a metering hopper 9 and a silo 10, which are installed on the frame 4 from top to bottom in sequence. The bottom outlet of the hopper 8 and the top inlet of the metering hopper 9 are connected through a first screw feeder 11 for feeding, the metering hopper 9 and the frame 4 are connected through a plurality of weighing sensors 12, the bottom of the metering hopper 8 is connected to the silo 10 through a hose and a control valve is provided at the bottom outlet of the metering hopper 8, and the silo 10 is connected to the airflow classifier 1 through a second screw feeder 13.

[0023] See also Figure 1As shown, the screening device includes at least one circular screening machine, which includes a screen frame 14 and a base 15. The screen frame 14 is installed above the base 15, and the screen frame 14 and the base 15 are connected by a plurality of elastic supports 16. The screen frame 14 is driven by a vibration motor 17. Three layers of screen plates 18 are arranged above the top of the screen frame 14, and the side ends of the screen plates 18 of each layer are provided with a discharge pipe; a dust cover 19 is provided on the top of the uppermost screen plate 18, and the inlet of the dust cover 19 is connected to the outlet of the dispersion cylinder 5 through a third screw feeder 20.

[0024] The working principle of this embodiment is as follows:

[0025] The raw materials are poured into the hopper 8 for temporary storage. When the operation starts, the materials are fed into the quantitative hopper 9 through the first screw feeder 11, and the weight of the powder in the quantitative hopper 9 is monitored in real time through the weighing sensor 12. When the preset threshold is reached, the feeding is stopped, and then the control valve is opened to pass the powder in the quantitative hopper 9 into the silo 10. Then the quantitative hopper 9 is refilled with materials, and at this time, the induced draft fan 3 and the second screw feeder 13 start to work, so that the powder in the silo 10 is sucked into the airflow classifier 1 with the airflow for classification. The fine-particle powder is screened by the airflow classifier 1 and collected in the dust collector 2, while the coarse-particle powder is discharged from the coarse powder outlet at the bottom of the airflow classifier 1 into the dispersion tube 5. The high-pressure airflow is input into the dispersion tube 5 from the air supply pipe 6. Under the action of the airflow, the powders fly and collide with each other, and the agglomerated powder is broken up by the mutual collision of the powders.

[0026] The finally broken powder falls into the circular screen machine for re-screening, so that under the action of the vibrating screen plate 18, powders of different particle sizes are discharged from different discharge pipes to classify the powder materials.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hierarchical air flow dispersion device, characterized in that: It comprises a feeding device, an airflow classifier, a dust collector, an induced draft fan and a frame which are arranged in sequence, wherein the coarse powder outlet of the airflow classifier is connected to a dispersing device, and the bottom outlet of the dispersing device is connected to a screening device; The dispersion device comprises a dispersion cylinder and an air delivery pipe, wherein the upper end of the dispersion cylinder is connected to the coarse powder outlet of the airflow classifier, the air delivery pipe is arranged around the outer wall of the dispersion cylinder, a plurality of air delivery branches are connected to the air delivery pipe at equal intervals, the other end of the air delivery branch is connected to the outer wall of the dispersion cylinder and is connected to the inner wall of the dispersion cylinder, and the air inlet end of the air delivery pipe is input with high-pressure gas from the outside; The bottom of the dispersion cylinder is connected to a screening device and a control valve is provided at the connection. The screening device is used to vibrate and screen the discharged material again.

2. A hierarchical airflow dispersion device according to claim 1, characterized in that: The feeding device includes a hopper, a metering hopper and a silo, which are installed on the frame from top to bottom in sequence. The bottom outlet of the hopper and the top inlet of the metering hopper are connected through a first screw feeder for feeding. The bottom of the metering hopper is connected to the silo through a hose and a control valve is provided at the bottom outlet of the metering hopper. The silo is connected to an airflow classifier.

3. A hierarchical airflow dispersion device according to claim 2, characterized in that: The quantitative bucket is connected to the frame via a plurality of weighing sensors.

4. A hierarchical airflow dispersion device according to claim 2, characterized in that: The silo is connected to the airflow classifier via a second screw feeder.

5. A hierarchical airflow dispersion device according to claim 1, characterized in that: The screening device includes at least one circular screening machine, which includes a screen frame and a base. The screen frame is installed above the base, and the screen frame and the base are connected by a plurality of elastic supports. The screen frame is driven by a vibration motor, and three layers of screen plates are arranged above the top of the screen frame. A discharge pipe is arranged at the side end of each layer of the screen plates; a dust cover is provided on the top of the topmost screen plate, and the top of the dust cover is connected to the bottom outlet of the dispersion cylinder.

6. A hierarchical airflow dispersion device according to claim 5, characterized in that: The dust cover inlet and the dispersion tube outlet are connected via a third screw feeder.

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