Adjustable v-shaped powder concentrator and adjustment method

Abstract

Disclosed in the present invention is an adjustable V-shaped powder concentrator, comprising a housing of a V-shaped structure. An air supply port and a fine material collection port are respectively formed in the two ends of the top portion of the housing, and a coarse material collection port is formed in the bottom portion of the housing. Scattering plates and grading plates are provided in the housing, and an adjustment part is movably provided on the inner wall of the housing close to the grading plates. The adjustment part comprises a flow blocking plate, and the flow blocking plate is movably connected to the inner wall of the housing. By arranging the flow blocking plate in a fine material discharge channel of the powder concentrator, the present invention improves the precision of the powder concentrator while not increasing energy consumption. In addition, an adjustment apparatus for the flow blocking plate is further provided, such that the position of the flow blocking plate can be adjusted according to different production requirements, thereby adjusting the grading efficiency of the V-shaped powder concentrator.

Description

Adjustable V-type powder separator and adjustment method Technical Field

[0001] The present invention relates to the technical field of powder classifiers, in particular to an adjustable V-shaped powder classifier and an adjustment method. Background Art

[0002] The V-type powder separator is one of the most widely used gas-solid separation devices in industry. It can break up, dry, and separate particles, and is primarily used in the chemical, metallurgical, and building materials industries. The V-type powder separator relies on a breaking plate and a grading plate to break up and disperse particles. It features a simple structure, easy operation, and high screening efficiency.

[0003] In the dispersion zone, particles disperse and sink due to gravity. Driven by high-temperature, high-speed gas from the side, fine particles change their trajectory and move toward the grading plate. Coarse particles are less affected and continue to sink, thus separating the coarse and fine particles. The internal baffles of the V-type classifier are divided into grading plates and scattering plates. The scattering plates break up the raw material, and the grading plates, combined with the incoming material from the scattering plates, sort the raw material. The placement of the grading plates affects the airflow within the V-type classifier, and thus the particle separation effect. To improve the separation efficiency and reduce energy consumption of the V-type classifier, it must be optimized and modified.

[0004] Patent 213726964U: This invention improves the separation efficiency of the V-type classifier by installing a material receiving box on the underside of the V-type classifier, along with a mounting plate and filter screen. While this invention aims to increase separation efficiency, it does not optimize the V-type classifier's energy efficiency, resulting in increased energy consumption. Patent 211385800U: This invention incorporates guide blocks within the V-type classifier, continuously increasing the airflow velocity between the blocks. This continuously enhances the airflow's screening effect as the material falls to the discharge chamber, improving the material screening efficiency. This invention also incorporates a second air outlet and a buffer plate, strengthening the airflow within the machine and enhancing the screening efficiency. However, this invention does not optimize the baffles for energy consumption. Patent CN 219003335U: This invention enhances the V-type classifier's dispersing function by installing several dispersing frames that are movably connected to form a dispersing unit. However, this solution does not consider the impact of baffle distribution on energy consumption and classification efficiency

[0005] Existing improvements have mostly focused on the implementation of a single V-type classifier project, without significantly changing its structure or operating process. While adding guide blocks can increase the classifying efficiency of the V-type classifier, it is difficult to increase the classifying accuracy. Adding a filter can increase the classifying accuracy of the V-type classifier, but it significantly increases the pressure drop and, consequently, energy consumption.

[0006] Summary of the Invention

[0007] The object of the present invention is to provide an adjustable V-type powder classifier and an adjustment method to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] An adjustable V-shaped powder classifier comprises a V-shaped housing, with air supply ports and fine material collection ports respectively provided at the top ends of the housing, a coarse material collection port provided at the bottom of the housing, a scattering plate and a grading plate provided inside the housing, and an adjustment portion movably arranged on the inner wall of the housing near the grading plate;

[0010] The regulating portion includes a spoiler, and the spoiler is movably connected to the inner wall of the shell.

[0011] As a further solution of the present invention: the shell includes an air inlet cylinder and an air outlet cylinder, the air inlet cylinder and the air outlet cylinder are obliquely connected to form a V-shaped structure, a discharge port is provided on the side of the upper end of the shell close to the air supply port, and the breaking plate is located below the discharge port.

[0012] As a further solution of the present invention: a plurality of the scattering plates are provided, a plurality of the grading plates are provided, and the scattering plates and the grading plates are arranged obliquely to each other.

[0013] As a further solution of the present invention: the spoiler is connected to the inner wall of the shell in a sliding manner along the airflow direction, and the spoiler is connected to the inner wall of the shell in a rotational manner along the sliding direction.

[0014] As a further solution of the present invention: a sliding groove is provided on the shell, the sliding groove is arranged along the height direction of the shell, a slider is slidably connected in the sliding groove, the slider is connected to the sealing plate, and the spoiler is connected to the sealing plate slider for up and down rotation through a rotating shaft.

[0015] As a further solution of the present invention: the lower end of the sliding block is connected to a telescopic cylinder for driving the spoiler to rotate, and the piston end of the telescopic cylinder is rotatably connected to the spoiler.

[0016] As a further solution of the present invention: the outer wall of the shell is provided with a guide rail, the slider is slidably connected to the guide rail, the bottom plate of the shell is provided with a driving part for driving the slider to slide on the guide rail, the driving part includes a screw threadedly connected to the slider, the bottom plate of the shell is provided with a motor, the transmission shaft of the motor is dynamically connected to the main transmission rod, the main transmission rod is provided with transmission teeth, the bottom of the screw rod is fixedly connected to a driven gear, and the driven gear is engaged with the transmission teeth on the main transmission rod.

[0017] As a further solution of the present invention: a plurality of the sliders are provided, and a baffle is rotatably connected to the inner side of each slider, and the slider is connected to the sealing plate.

[0018] A method for adjusting an adjustable V-type powder separator defines materials with a diameter less than or equal to b as fine materials and materials with a diameter greater than b as coarse materials. The method comprises the following steps:

[0019] Step 1: Obtain the classification efficiency η of coarse material with a diameter greater than b at the fine material collection port;

[0020] Step 2: Compare the classification efficiency η obtained in step 1 with the adjustment threshold, adjust the angle of the spoiler through the adjustment unit, and repeat step 1; if it is less than the classification threshold, execute step 3;

[0021] Step 3: Adjustment is completed.

[0022] As a further solution of the present invention: the classification efficiency The adjustment threshold includes a coarse adjustment threshold m and a fine adjustment threshold n;

[0023] The step 2 comprises the following steps:

[0024] Step 2.1: Determine whether the classification efficiency η obtained in step 1 is greater than the coarse adjustment threshold m. If so, perform coarse adjustment by adjusting the height of the spoiler and then execute step 1. If less than the coarse adjustment threshold m, execute step 2.2.

[0025] Step 2.2: Determine whether the classification efficiency η obtained in step 1 is greater than the fine-tuning threshold n. If so, fine-tune the efficiency by adjusting the angle of the spoiler and then execute step 1. If less than the fine-tuning threshold n, execute step 3.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention improves the accuracy of the powder classifier without increasing energy consumption by providing a baffle in the fine material discharge channel of the powder classifier; and at the same time, an adjustment device for the baffle is provided, and the position of the baffle can be adjusted according to different production needs, thereby adjusting the grading efficiency of the V-type powder classifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of a V-type powder separator according to the present embodiment;

[0028] FIG2 is a schematic diagram of the outer structure of the adjustment part of this embodiment;

[0029] FIG3 is a schematic diagram of the internal structure of the adjustment part of this embodiment;

[0030] FIG4 is a schematic structural diagram of the driving unit of this embodiment;

[0031] Figure 5 is a diagram of the raw material particle distribution of the V-type powder separator;

[0032] Figure 6 is a comparison of the field measured classification efficiency of equipment with and without baffles;

[0033] FIG7 is a flow chart of the adjustment method of this embodiment;

[0034] FIG8 is a schematic diagram of the position of the spoiler after adjustment in Example 1.

[0035] In the figure: 1-air supply port, 2-feeding port, 3-coarse material collection port, 4-scattering plate, 5-grading plate, 6-fine material collection port, 7-motor, 8-main transmission rod, 9-driven gear, 10-screw, 11-guide rail, 12-slider, 13-telescopic cylinder, 14-baffle, 15-sealing plate, 16-rotating shaft. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Please refer to Figures 1-4. In an embodiment of the present invention, an adjustable V-type powder classifier includes a shell with a V-shaped structure, an air supply port 1 and a fine material collection port 6 are respectively provided at the two ends of the top of the shell, a coarse material collection port 2 is provided at the bottom of the shell, a scattering plate 4 and a grading plate 5 are provided in the shell, the shell includes an air inlet cylinder and an air outlet cylinder, the air inlet cylinder and the air outlet cylinder are obliquely connected to form a V-shaped structure, a discharge port 2 is provided on the side of the upper end of the shell close to the air supply port 1, the scattering plate 4 is located below the discharge port 2, a plurality of scattering plates 4 are provided, a plurality of grading plates 5 are provided, and the scattering plates 4 and the grading plates 5 are arranged obliquely to each other.

[0038] An adjusting portion is movably arranged on the inner wall of the shell near the grading plate 5, and the adjusting portion includes a spoiler 14, which is movably connected to the inner wall of the shell. In this embodiment, the spoiler 14 is slidably connected to the inner wall of the shell along the airflow direction, and the spoiler 14 is rotatably connected to the inner wall of the shell along the sliding direction. A sliding groove is provided on the shell, and the sliding groove is arranged along the height direction of the shell. A slider 12 is slidably connected in the sliding groove, and the slider 12 is connected to the sealing plate 15. The spoiler 14 is rotatably connected to the sealing plate 15 slider 12 through a rotating shaft 16. The lower end of the slider 12 is connected to a telescopic cylinder 13 for driving the spoiler 14 to rotate. The piston end of the telescopic cylinder 13 is rotatably connected to the spoiler 14, and the outer wall of the shell A guide rail 11 is provided, and a slider 12 is slidably connected to the guide rail 11. The bottom plate of the shell is provided with a driving part for driving the slider 12 to slide on the guide rail 11, and the driving part includes a screw 10 threadedly connected to the slider 12. The bottom plate of the shell is provided with a motor 7, and the transmission shaft of the motor 7 is powered by a main transmission rod 8. The rear end of the main transmission rod 8 has a transmission gear, as shown in Figure 4 of the specification, the transmission teeth on the main transmission rod 8 are connected to the output shaft of the motor 7, and the bottom of the screw rod 10 is fixedly connected to a driven gear 9, and the driven gear 9 is fixedly connected to the screw rod 10, and then the main transmission rod 8 can be driven to rotate by the motor, and the main transmission rod 8 drives the driven gear 9 to rotate, and then the driven gear 9 drives the screw rod 10 to rotate.

[0039] Multiple sliders 12 are provided, each rotatably connected to a baffle 14 on its inner side. A sealing plate 15 is positioned over the sliding groove. The sealing plate is larger than the groove, ensuring it covers the groove regardless of the slider's movement, achieving a preliminary seal for the powder particles. A rubber bellows, shaped like the groove, is then installed over the elongated groove in the housing. The bellows should be able to expand and contract by at least 50% of its length to achieve a complete gas seal.

[0040] An adjustable V-type powder separator adjustment method defines materials with a diameter less than or equal to b as fine materials, and materials with a diameter greater than b as coarse materials, and the classification efficiency

[0041] In this example, the classification efficiency is first defined:

[0042] As shown in Figures 5, 6, and 7 of the specification, the flow velocity of the V-type classifier gradually increases from right to left at the outlet. The flow field influences the particles, which can be divided into two zones: an escape zone for particles less than 80 μm and an escape zone for particles 200-600 μm. The V-type classifier aims to collect as many raw material particles smaller than 80 μm as possible at the subdivided discharge port, while reducing those larger than 200 μm. The greater the classification efficiency of raw material particles smaller than 80 μm, while the lower the classification efficiency of particles larger than 200 μm, the higher the classification accuracy of the V-type classifier.

[0043] Therefore, a baffle is added to the outlet sidewall to block the airflow in the 200-600 μm escape zone, thereby filtering particles in this size range. Field testing has shown that adding a baffle to a V-type classifier can effectively reduce the classification efficiency of medium-coarse particles (200-600 μm) by approximately 50% while maintaining the same efficiency for fine particles, achieving precise particle screening. At the same time, the overall pressure drop of the V-type classifier remains essentially unchanged.

[0044] The adjustment threshold includes a coarse adjustment threshold m and a fine adjustment threshold n. In this embodiment, the coarse adjustment diameter range is 200-400 μm, the coarse adjustment threshold is 20%, and the fine adjustment threshold is 10%. The adjustment method includes the following steps:

[0045] Step 1: Obtain the classification efficiency η of coarse material with a diameter greater than b at the fine material collection port 6;

[0046] In the step 1: the experimental V-type powder classifier equipment cannot directly obtain the classification efficiency η of coarse materials with a particle size greater than b under different working conditions through actual measurement or other means. According to the definition formula of the classification efficiency η, the present invention uses computational fluid dynamics software to realize real-time and accurate calculation of the classification efficiency of coarse materials with a particle size greater than b when the baffle 14 is in a certain position. Step 2, compare the classification efficiency η obtained in step 1 with the adjustment threshold, adjust the angle of the baffle 14 through the adjustment unit, and repeat step 1; if it is less than the classification threshold, execute step 3;

[0047] Step 2 includes the following steps:

[0048] Step 2.1: Determine whether the classification efficiency η obtained in step 1 is greater than the coarse adjustment threshold m. If so, perform coarse adjustment by adjusting the height of the spoiler 14 and then execute step 1. If less than the coarse adjustment threshold m, execute step 2.2.

[0049] Step 2.2: Determine whether the classification efficiency η obtained in step 1 is greater than the fine-tuning threshold n. If it is greater than the fine-tuning threshold n, fine-tune by adjusting the angle of the spoiler 14, and then execute step 1; if it is less than the fine-tuning threshold n, execute step 3.

[0050] Step 3: Adjustment is completed.

[0051] Example 1

[0052] For a density of 2786kg / m 3 , d 50 For raw material particles with a diameter of 560 μm, a 2500t / d V-type powder classifier is used for powder selection, and the classification efficiency of particles with a particle size of 300 μm is controlled below 15%. The specific implementation operations are as follows:

[0053] (1) Without making any adjustment to the baffle, the V-type powder separator is used directly. The classification efficiency of particles with a particle size of 300 μm is 35.76%.

[0054] (2) Gradually adjust the height of the baffle. When the baffle is 4700mm from the top outlet of the classifier, the V-type classifier can achieve a classification efficiency of 18.70% for particles with a size of 300μm. At the same time, the classification efficiency of particles with a size less than 100μm is 98.22%.

[0055] (3) Based on (1), rotating the baffle 7° clockwise can reduce the classification efficiency of particles with a diameter of 300 μm to 11.57%. At the same time, the classification efficiency of particles with a diameter less than 100 μm is 97.3%.

[0056] As shown in Figure 8 of the specification, the distance between the adjusted baffle and the top outlet of the powder classifier is 4700 mm, and the angle of the baffle is 7°.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0058] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An adjustable V-type powder separator, comprising a housing with a V-shaped structure, wherein two ends of the top of the housing are respectively provided with an air supply port (1) and a fine material collection port (6), and a coarse material collection port (2) is provided at the bottom of the housing, characterized in that, A dispersion plate (4) and a classification plate (5) are arranged inside the housing, and an adjusting part is movably arranged on the inner wall of the housing close to the classification plate (5); The adjusting part includes a flow blocking plate (14), and the flow blocking plate (14) is movably connected to the inner wall of the housing.

2. The adjustable V-type powder separator according to claim 1, wherein The housing includes an air inlet cylinder and an air outlet cylinder. The air inlet cylinder and the air outlet cylinder are obliquely connected to form a V-shaped structure. A blanking port (2) is arranged on one side of the upper end of the housing close to the air supply port (1), and the dispersion plate (4) is located below the blanking port (2).

3. The adjustable V-type powder separator according to claim 1, wherein A plurality of dispersion plates (4) are provided, and a plurality of classification plates (5) are provided. The dispersion plates (4) and the classification plates (5) are arranged obliquely to each other.

4. The adjustable V-type powder separator according to claim 1, wherein, The flow blocking plate (14) is slidably connected to the inner wall of the housing along the air flow direction, and the flow blocking plate (14) is rotatably connected to the inner wall of the housing along the sliding direction.

5. The adjustable V-type powder separator according to claim 4, characterized in that, A sliding groove is formed in the housing. The sliding groove is arranged along the height direction of the housing. A slider (12) is slidably connected in the sliding groove. The slider (12) is connected to a sealing plate (15). The flow blocking plate (14) is rotatably connected to the sealing plate (15) up and down through a rotating shaft (16).

6. The adjustable V-type powder separator according to claim 5, wherein, A telescopic cylinder (13) for driving the flow blocking plate (14) to rotate is connected to the lower end of the slider (12), and the piston end of the telescopic cylinder (13) is rotatably connected to the flow blocking plate (14).

7. An adjustable V-type powder separator according to claim 5, characterized in that, A guide rail (11) is arranged on the outer wall of the housing. The slider (12) is slidably connected to the guide rail (11). A driving part for driving the slider (12) to slide on the guide rail (11) is arranged on the bottom plate of the housing. The driving part includes a lead screw (10) threadedly connected to the slider (12). A motor (7) is arranged on the bottom plate of the housing. The transmission shaft of the motor (7) is power-connected to a main transmission rod (8). Transmission teeth are arranged on the main transmission rod (8). A driven gear (9) is fixedly connected to the bottom of the lead screw (10). The driven gear (9) meshes with the transmission teeth on the main transmission rod (8).

8. An adjustable V-type powder separator according to claim 5, characterized in that, A plurality of sliders (12) are provided. A flow blocking plate (14) is rotatably connected to the inner side of each slider (12), and the slider (12) is connected to a sealing plate (15).

9. An adjusting method for an adjustable V-type powder separator, characterized in that, When using the powder separator according to any one of claims 1-8, defining the material with a diameter less than or equal to b as fine material and the material with a diameter greater than b as coarse material, the adjustment method includes the following steps: Step 1: Obtain the classification efficiency η of the coarse material with a diameter greater than b at the fine material collection port (6); Step 2: Compare the classification efficiency η obtained in Step 1 with the adjustment threshold, then adjust the angle of the flow blocking plate (14) through the adjusting part, and repeat Step 1; if it is less than the classification threshold, execute Step 3; Step 3: The adjustment is completed.

10. A method for adjusting an adjustable V-type powder separator according to claim 9, characterized in that, The grading efficiency The adjustment thresholds include a coarse adjustment threshold m and a fine adjustment threshold n; Step 2 includes the following steps: Step 2.1: Determine whether the classification efficiency η obtained in Step 1 is greater than the coarse adjustment threshold m. If it is greater than the coarse adjustment threshold m, perform coarse adjustment by adjusting the height of the baffle (14), and then execute Step 1. If it is less than the coarse adjustment threshold m, execute Step 2.

2. Step 2.2: Determine whether the classification efficiency η obtained in Step 1 is greater than the fine adjustment threshold n. If it is greater than the fine adjustment threshold n, perform fine adjustment by adjusting the angle of the baffle (14), and then execute Step 1. If it is less than the fine adjustment threshold n, execute Step 3.

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