Multi-channel air inlet V-shaped powder concentrator

Abstract

The utility model provides a multi-channel air inlet V-shaped powder selecting machine which comprises a V-shaped powder selecting shell, and an inner cavity of the V-shaped powder selecting shell is sequentially provided with a multi-channel air inlet area, a scattering area, a grading area and an air outlet cavity. The air outlet is communicated with a cavity body of the air outlet cavity; the air inlet is communicated with the multi-channel air inlet area; wherein the grading area comprises a plurality of grading plates which are sequentially arranged from top to bottom; the multi-channel air inlet area comprises two groups of triangular scattering air deflectors and airflow deflectors which are arranged up and down; wherein one group of airflow guide plates and one group of triangular scattering air guide plates are sequentially arranged from top to bottom; the airflow guide plate is arranged on the inner wall of the V-shaped powder selecting shell; a plurality of independent air inlet channels are formed in the multi-air-duct air inlet area of the V-shaped powder selecting shell; the lower end of each airflow guide plate is connected with the two air guide plate intersecting lines of the triangular scattering air guide plate in a welded mode. The speed distribution of a scattering area is more reasonable, and the change of speed level difference is smaller.

Description

Technical Field

[0001] This utility model relates to the grinding field of the building materials industry, and in particular to a multi-channel air-inlet V-type classifier. Background Technology

[0002] In cement production, V-type air classifiers, along with roller presses, play a crucial role in the grinding system. With the continuous upgrading of cement grinding equipment, the energy-saving effect of roller press systems is becoming increasingly apparent. To achieve even better results, in addition to proper maintenance and upkeep of the roller press, we need to pay attention to all aspects affecting its extrusion efficiency, including the V-type air classifier. The sorting efficiency of the V-type air classifier directly determines the amount of fine powder content in the returned powder. If the returned powder contains a large amount of fine powder, this material with a high fine powder content directly affects the stability of the material bed in the roller press. An unstable material bed directly affects the stable operation and extrusion efficiency of the roller press. Therefore, the sorting efficiency of the V-type air classifier needs to be given high priority. To improve the sorting efficiency of the V-type air classifier, it is necessary to adjust the airflow and the grid plates in the internal dispersing and grading zones to maximize its sorting efficiency. With the continuous improvement of my country's requirements for cement grinding energy consumption indicators, everyone needs to pay attention to the energy consumption of each piece of equipment in the grinding system. The V-type air classifier uses airflow to separate material particles. Therefore, improving the airflow separation efficiency and reducing equipment resistance are of great significance for energy conservation and consumption reduction. Completing the separation operation with a smaller airflow and a smaller pressure loss is something that needs attention and research.

[0003] The original V-type air classifier had a straight, densely distributed dispersing plate, resulting in significant variations in internal air velocity, turbulent flow, and abrupt changes in air velocity, leading to high resistance. Due to the pressure variations across the dispersing plate, the airflow within the inlet chamber was unevenly distributed from top to bottom. Some airflow bypassed at the top, leaving the bottom without any separation process. As material entered through the inlet and fell down the dispersing plate, the path of airflow impacted its flow was short, resulting in low separation efficiency and high resistance. Consequently, a large amount of unseparated fine powder remained in the coarse material after passing through the V-type air classifier, affecting the smooth operation of subsequent equipment. To address the issues of high resistance and uneven airflow distribution, a new multi-channel V-type air classifier was designed. Summary of the Invention

[0004] To address the aforementioned issues, this invention discloses a multi-channel air-inlet V-type classifier, which features a more rational velocity distribution in the dispersing zone, smaller velocity level variations, which is beneficial for stabilizing the sorting force field and significantly reduces airflow resistance, resulting in a marked energy-saving and consumption-reducing effect compared to older structures.

[0005] A multi-channel air-inlet V-type air classifier includes a V-shaped air-inlet housing, wherein the top of the V-shaped air-inlet housing is provided with a feeding port and the bottom with a discharge port, wherein one end of the top of the V-shaped air-inlet housing is provided with an air outlet and the other end with an air inlet, wherein the inner cavity of the V-shaped air-inlet housing is provided with a multi-channel air inlet zone, a dispersing zone, a grading zone and an air outlet chamber in sequence; the air outlet communicates with the air outlet chamber; the air inlet communicates with the multi-channel air inlet zone; wherein the grading zone includes a plurality of grading plates arranged sequentially from top to bottom; the multi-channel air inlet zone includes two sets of upper and lower triangular dispersing guide plates and airflow guide plates; wherein one set of airflow guide plates and one set of triangular dispersing guide plates are arranged sequentially from top to bottom; the airflow guide plates are disposed on the inner wall of the V-shaped air-inlet housing; thereby forming a plurality of independent air inlet channels in the multi-channel air inlet zone of the V-shaped air-inlet housing; the lower end of each airflow guide plate is welded to the intersection line of the two guide plates of the triangular dispersing guide plate.

[0006] Furthermore, the triangular dispersing guide plate is a flat triangle. One side of the triangle is a dispersing plate, which disperses the material falling from above. The other two sides are guide plate one and guide plate two, respectively.

[0007] Furthermore, a support seat is installed on the outer surface of the V-shaped powder separator housing.

[0008] Furthermore, the lower ends of the airflow guide plates are all connected to the intersection lines of the two guide plates of the triangular dispersion guide plate by welding.

[0009] The working principle of this utility model is as follows:

[0010] This invention replaces the dispersing plate with a dispersing guide plate, reducing the number of plates and increasing the space for airflow. Several airflow guide plates are installed inside the air inlet cavity. These airflow guide plates are welded to the two guide plates of the triangular dispersing guide plate, forming several independent air inlet channels within the air inlet cavity. This reduces mutual interference, and a certain amount of airflow can be distributed throughout the dispersing plate area from top to bottom. After the material is fed in through the inlet, it falls onto the dispersing plate on the dispersing guide plate for dispersing. During its downward movement, the material is washed by the airflow from the inlet through several independent air inlet channels, which plays a sorting role throughout the entire falling path. This extends the sorting path and sorting time, greatly improving the sorting efficiency. The fine powder separated by the airflow is carried by the airflow, passes through the grading plate, and then flows out through the outlet of the air outlet cavity, thereby achieving the purpose of separating the fine powder from the mixture entering from the inlet.

[0011] The beneficial effects of this utility model are:

[0012] Because the velocity distribution in the scattering area is more reasonable and the velocity difference is smaller, it is conducive to the stability of the sorting force field, and the airflow resistance is greatly reduced, resulting in significant energy saving and consumption reduction compared to the old structure. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of this utility model;

[0014] Figure 2 , Figure 1 A magnified view of part A in the middle;

[0015] Figure 3 A three-dimensional cross-sectional view of this utility model.

[0016] List of reference numerals in the attached diagram:

[0017] The components are as follows: 1. Discharge port; 2. Powder separator shell; 3. Support base; 4. Air outlet; 5. Air outlet cavity; 6. Grading plate; 7. Feed inlet; 8. Dispersing guide plate; 9. Air inlet; 10. Flow guide plate; 11. Air inlet channel; 81. Guide plate one; 82. Guide plate two; 83. Dispersing plate. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] like Figure 1-3 As shown, a multi-channel air-inlet V-type classifier of this embodiment includes a V-type classifier housing 2, and a support base 3 is installed on the outer surface of the V-type classifier housing 2.

[0020] The V-shaped powder classifier shell 2 has a feeding port 7 at the top and a discharge port 1 at the bottom. One end of the top of the V-shaped powder classifier shell 2 has an air outlet 4, and the other end has an air inlet 9. The V-shaped powder classifier shell 2 is characterized by having a multi-channel air inlet area, a dispersing area, a grading area, and an air outlet cavity 5 arranged sequentially within its inner cavity. The air outlet 4 communicates with the air outlet cavity 5. The air inlet 9 communicates with the multi-channel air inlet area. The grading area includes several grading plates 6 arranged sequentially from top to bottom. The air inlet area includes two sets of triangular dispersing air guide plates 8 and airflow guide plates 10 arranged vertically; one set of airflow guide plates 10 and one set of triangular dispersing air guide plates 8 are arranged sequentially from top to bottom; the airflow guide plates 10 are set on the inner wall of the V-shaped powder classifier shell 2; so that the multi-channel air inlet area of ​​the V-shaped powder classifier shell 2 forms several independent air inlet channels 11; the lower end of each airflow guide plate 10 is welded to the intersection line of the two air guide plates of the triangular dispersing air guide plate 8.

[0021] The triangular dispersing air guide plate 8 is a flat triangle, with one side being the dispersing plate 83 and the other two sides being the air guide plate 1 81 and the air guide plate 2 82, respectively.

[0022] To address the issues of high resistance and uneven airflow distribution in this embodiment, the newly designed multi-channel inlet V-shaped classifier replaces the dispersing plates with dispersing guide plates 8, reducing their number and increasing the space for airflow. Several airflow guide plates 10 are installed inside the inlet cavity, welded to the intersecting lines of the two guide plates of the triangular dispersing guide plates, forming several independent inlet channels 11 within the inlet cavity. This reduces mutual interference, ensuring a certain airflow is distributed throughout the dispersing plate area from top to bottom. The material enters from the feed inlet 7. After being fed in, the material falls onto the dispersing plate on the dispersing guide plate 8 and is dispersed. During its downward movement, it is washed by the airflow from the air inlet 9 through several independent air inlet channels 11. This process can play a sorting role throughout the entire falling path, extending the sorting path and sorting time, and greatly improving the sorting efficiency. The fine powder separated by the airflow is carried by the airflow, passes through the grading plate 6, and then flows out from the air outlet 4 through the air outlet cavity 5, thereby achieving the purpose of separating the fine powder from the mixture entering from the feed inlet 7.

[0023] In this embodiment, the internal flow field turbulence of the multi-channel air-inlet V-type classifier is greatly improved, the velocity distribution is more reasonable, the pressure loss is significantly reduced, and the sorting efficiency is improved.

[0024] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A multi-channel air inlet V-type powder concentrator, comprising a V-type powder concentration shell (2), wherein the top of the V-type powder concentration shell (2) is provided with a feeding port (7) and the bottom is provided with a discharging port (1), and one end of the top of the V-type powder concentration shell (2) is provided with an air outlet (4) and the other end is provided with an air inlet (9); characterized in that: The inner cavity of the V-shaped powder selecting shell (2) is sequentially provided with a multi-channel air inlet area, a scattering area, a classification area and an air outlet cavity (5); the air outlet (4) is communicated with the air outlet cavity (5); the air inlet (9) is communicated with the multi-channel air inlet area; wherein the classification area comprises a plurality of classification plates (6) sequentially arranged from top to bottom; the multi-channel air inlet area comprises two groups of triangular scattering air guide plates (8) and airflow guide plates (10) arranged above and below; one group of airflow guide plates (10) and one group of triangular scattering air guide plates (8) are sequentially arranged from top to bottom; the airflow guide plate (10) is arranged on the inner wall of the V-shaped powder selecting shell (2); the multi-channel air inlet area of the V-shaped powder selecting shell (2) forms a plurality of independent air inlet channels (11); the lower end of each airflow guide plate (10) is connected with the intersection line of the two air guide plates of the triangular scattering air guide plate (8).

2. A multi-lane inlet air V-type powder concentrator according to claim 1, characterized in that: The triangular scattering air guide plate (8) is a flat triangle, one side of the triangle is a scattering plate (83), and the other two sides are air guide plate one (81) and air guide plate two (82) respectively.

3. A multi-lane inlet air V-type powder concentrator according to claim 1, characterized in that: The outer surface of the V-shaped powder selecting shell (2) is provided with a supporting seat (3).

4. A multi-lane inlet air V-type powder concentrator according to claim 1, characterized in that: The lower end of the airflow guide plate (10) is connected with the intersection line of the two air guide plates of the triangular scattering air guide plate (8) through welding.

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