CN205392995U - Perpendicular flow pattern gravity -type air classifier - Google Patents

Abstract

The utility model provides a vertical flow type gravity air classifier, which includes a body, a classifying chamber, a breaking disc, a deflector, a deflector, a fan, a circulation pipeline, a settling chamber and a hopper; The tuyere is connected, and the classification chamber is respectively provided with a feed inlet and a discharge outlet. The bottom side of the classification chamber is connected with the fan through the air inlet pipe, and the circulation pipe is used to connect the air inlet of the fan with the outlet of the settling chamber. The bottom of the settling chamber is connected, and multiple deflectors are installed in the settling chamber for deflecting the flow; the dispersing disc is installed obliquely at the feed inlet of the classifying chamber. The board wall and deflector are obliquely welded at the air inlet duct. This product can reduce the eddy current dead zone in the classification chamber by using the inclined plate wall, significantly reduce the flow resistance, reduce the pressure loss and improve the classification accuracy.

Description

Vertical Flow Gravity Air Classifier

technical field

The utility model relates to the field of split particle classification equipment, in particular to a vertical flow type gravity air classifier.

Background technique

Classification is based on the fact that particles of different particle sizes, shapes or densities are separated from each other by different gravity and medium resistance when they move in a fluid (such as air or water), and then produce different motion trajectories. Classification technology is widely used in mineral processing, environmental protection, building materials, metallurgy, fuel, chemical industry, ceramics, food and other industries. Classification includes classification of grinding circuit, classification before sorting, classification before slime treatment and tailings disposal, etc. Through the classification technology, the larger or smaller particles in the provided raw materials are removed, so that the larger particles fall into the coarse powder, and the smaller particles enter the fine powder, which can better control the range of product particle size and meet the requirements of industrial production. needs, while improving product application effects and increasing product added value. The classification and the grinding operation cooperate to form a circular flow grinding system, which can separate the qualified products obtained from the grinding from the materials through classification. The application of grading technology avoids excessive crushing of materials, reduces machine loss, improves production efficiency, and effectively controls the fineness of products to meet production needs.

The airflow classifier is a gravity airflow type classifier, which mainly utilizes the different drag force and gravity due to the difference in particle size, shape or density during the movement of the material with the airflow, so that the movement path of the particles is different to achieve classification. Widely used in mineral processing, metallurgy, building materials, chemical industry and other industries. In the process industry, some working links have strict requirements on the size of powder particles. If the particle size exceeds the appropriate range, it will have a great impact on the subsequent working links.

Due to the need to establish a strong centrifugal force field during the classification process, the traditional centrifugal classifier needs to provide high rotational power and air source power. Although it can obtain high classification efficiency and classification accuracy, the power consumption is very high. In contrast, gravity air classifiers have the advantages of no moving parts, low energy consumption, and relatively small pressure loss. Considering energy saving and environmental protection, gravity air classifiers have attracted more and more attention.

At present, the gravity air classifier also has various problems that need to be solved and improved, such as: the eddy current loss is easy to occur in the classification chamber, the eddy current dead zone exists in the fine powder settling chamber, the classification accuracy is low, and the pressure loss can still be reduced.

Utility model content

The purpose of this utility model is to provide a new vertical flow type gravity air classifier with simpler and more reasonable structure, more stable airflow in the classifying chamber and settling chamber, higher classification accuracy and smaller pressure loss.

The utility model discloses a vertical flow type gravity air classifier, comprising a machine body and a classifying chamber installed on the machine body, a breaking disc, a fan, a circulation pipeline, a settling chamber and a hopper;

The classification chamber is connected with the air inlet of the settling chamber, the upper part of the classification chamber is provided with a feed inlet, the bottom of the classification chamber is provided with a discharge outlet, and the bottom side of the classification chamber is connected with the air outlet of the fan through the air inlet pipe, so The circulation pipeline is used to communicate with the air inlet of the fan and the air outlet of the settling chamber, the hopper is arranged at the bottom of the settling chamber, and the hopper communicates with the bottom of the settling chamber, and a plurality of guides for guiding flow are installed in the settling chamber plate;

The dispersing disc is installed obliquely at the feed inlet of the classification chamber, a first slant wall is provided on the upper side of the classification chamber, a second slant wall is provided on the inside of the classification chamber, and the first slant wall is located in the On the opposite side of the entrance of the settling chamber, the second inclined plate wall is located on the opposite side of the first inclined plate wall, and the upper part of the second inclined plate wall is connected with the entrance of the settling chamber.

Further, the first sloping plate wall is arranged parallel to the second sloping plate wall.

Further, there is at least one settling chamber.

Further, the settling chamber is a cuboid structure.

Further, the deflector is a louver-like structure.

Further, the plurality of deflectors are sequentially installed inside the settling chamber at intervals.

Further, the breaking disc is made of a steel plate with several ventilation holes.

Further, the inclination angle of the dispersing disc is 20°-40°.

Further, a deflector is also included, and the deflector is obliquely welded at the air inlet duct.

Further, the deflector is a smooth steel plate at an angle of 30 degrees to the horizontal plane.

Adopt above-mentioned technical scheme, the technical effect that the utility model produces has:

(1) The first sloping plate wall reduces the eddy current dead zone at the corner of the classification chamber, greatly reducing the eddy current loss there;

(2) The new structure makes it possible to install a longer dispersing disk here, and the powder material can be more fully diffused on the extended dispersing disk, and there is only one dispersing disk here, which has little hindrance to the air. So that the pressure loss is relatively small;

(3) The powder material diffused by the dispersing disc falls to the second inclined plate wall and further diffuses, and the fully diffused powder material passes through the air outlet of the fan under the action of gravity, which is convenient for secondary classification;

(4) The deflector has a diversion effect on the air that has just entered the classification chamber, avoiding the high-speed flowing air vertically hitting the wall of the device and making the air flow turbulent, making the air flow relatively stable, which is convenient for the air flow to drive the powder particles Go to the settling chamber for classification;

(5) The airflow from the classification chamber becomes more stable under the action of multiple deflectors, the degree of turbulence is reduced, which is beneficial to settlement and improves the classification accuracy.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the structural representation of embodiment one of the utility model;

Fig. 2 is the structural representation of the deflector of the present utility model;

Fig. 3 is the structural representation of embodiment two of the utility model;

Reference signs:

1-Body; 2-Classification room; 3-Scattering disc;

4-fan; 5-circulation pipeline; 6-sedimentation chamber;

7-hopper; 8-deflector; 9-deflector;

21-feed inlet; 22-discharge port; 23-the first inclined plate wall;

24 - Second sloping wall.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

Embodiment one

Please refer to Figure 1;

A vertical flow type gravity air classifier disclosed in the utility model comprises a body 1 and a classifying chamber 2 installed on the body 1, a breaking disc 3, a fan 4, a circulation pipeline 5, a settling chamber 6 and a hopper 7;

The classification chamber 2 is installed on the left part of the body 1, the air outlet on the upper right side of the classification chamber 2 communicates with the air inlet of the settling chamber 6, and the upper left side of the classification chamber 2 is provided with a feed port 21 for inputting materials, The bottom of the classification chamber 2 is provided with a discharge port 22 for discharging large particles of coarse powder. One side of the bottom of the classification chamber 2 is connected with the air outlet of the fan 4 through the air inlet pipe. The fan 4 is used to blow the materials in the classification chamber 2. .

The grading chamber 2 as a whole can be set in a rectangle, a square or other shapes.

In this embodiment, a first sloping plate wall 23 is provided on the upper outside of the classifying chamber 2, and a second sloping plate wall 24 is provided on the inside of the classifying chamber 2, and the first sloping plate wall 23 is located on the opposite side of the entrance of the settling chamber 6, The second inclined plate wall 24 is located on the opposite side of the first inclined plate wall 23 , and the upper part of the second inclined plate wall 24 is connected to the entrance of the settling chamber 6 .

Preferably, the first sloping plate wall 23 and the second sloping plate wall 24 are arranged in parallel.

The inclination angle between the first inclined plate wall 23 and the horizontal plane is 20°-50°, preferably 30°. A more reasonable installation angle can effectively adjust the cyclone vortex phenomenon generated at the corner end of the classifying chamber 2 .

Compared with the rectangular or square grading chamber commonly used in the prior art, the first slanted wall of the utility model replaces the corner of the grading chamber with a beveled first slanted wall 23, which reduces the angle of the upper left corner of the grading chamber. The eddy current dead zone greatly reduces the eddy current loss; improves the classification efficiency of materials;

In the utility model, the powder material diffused by the dispersing disc falls on the second inclined plate wall 24 and further diffuses, and the fully diffused powder material passes through the air outlet of the air inlet pipe at the lower part of the classification chamber under the action of gravity, which is convenient for two sub-grading.

The degree of separation and dispersion of materials determines the classification efficiency. In order to obtain higher classification efficiency, it is necessary to separate and disperse the materials as much as possible. Therefore, a dispersing disc 3 is installed at the inlet of the classification chamber.

The dispersing disc 3 is obliquely installed at the feed inlet 21 in the classifying chamber 2 (shown as a slope with high left and low right).

Preferably, the dispersing disc 3 is made of a steel plate with several ventilation holes; Dispersed plate structure, this embodiment can avoid the problem of excessive pressure loss to the airflow.

Preferably, the inclination angle of the dispersing disc 3 is 20°-40°; preferably about 30°, a reasonable inclination angle of the dispersing disc can effectively reduce the resistance to the air and improve the separation and dispersion efficiency of materials.

The circulation pipe 5 is used to connect the air inlet of the fan 4 with the air outlet of the settling chamber 6, and is used for reusing the gas discharged from the classifying chamber 2 to reduce air pollution. The hopper 7 is arranged at the bottom of the settling chamber 6 , and the hopper 7 communicates with the bottom of the settling chamber 6 , and is used for collecting particles with smaller diameters falling in the settling chamber 6 .

In this embodiment, the settling chamber is preferably designed as a cuboid structure.

Moreover, one settling chamber can be provided, or a plurality of settling chambers arranged side by side and connected can be arranged according to actual needs, which is convenient for industrial application.

A plurality of deflectors 8 for guiding flow are installed in the settling chamber 6; the plurality of deflectors 8 are connected with the settling chamber 6 by means of welding, plugging or bolted connection, and the deflectors 8 can make the flow into the settlement The airflow in chamber 6 becomes more stable, which is beneficial to the settlement of split particles and improves the classification accuracy.

Preferably, please refer to FIG. 2 , the deflector 8 of the present invention is a louver-like structure.

Preferably, a plurality of deflectors 8 of the present invention are sequentially installed inside the settling chamber 6 at intervals, which can further improve the classification accuracy of powder materials.

Embodiment two

Please refer to Figure 3;

The utility model discloses a vertical flow type gravity air classifier, comprising a body 1 and a classifying chamber 2 installed on the body 1, a breaking disc 3, a deflector 9, a fan 4, a circulation pipe 5, and a settling chamber 6 and hopper 7;

The classification chamber 2 is installed on the left part of the body 1, the air outlet on the upper right side of the classification chamber 2 communicates with the air inlet of the settling chamber 6, and the upper left side of the classification chamber 2 is provided with a feed port 21 for inputting materials, The bottom of the classification chamber 2 is provided with a discharge port 22 for discharging large particles of coarse powder. One side of the bottom of the classification chamber 2 is connected with the air outlet of the fan 4 through the air inlet pipe. The fan 4 is used to blow the materials in the classification chamber 2. .

The grading chamber 2 as a whole can be set in a rectangle, a square or other shapes.

In this embodiment, a first sloping plate wall 23 is provided on the upper outside of the classifying chamber 2, and a second sloping plate wall 24 is provided on the inside of the classifying chamber 2, and the first sloping plate wall 23 is located on the opposite side of the entrance of the settling chamber 6, The second inclined plate wall 24 is located on the opposite side of the first inclined plate wall 23 , and the upper part of the second inclined plate wall 24 is connected to the entrance of the settling chamber 6 .

Preferably, the first sloping plate wall 23 and the second sloping plate wall 24 are arranged in parallel.

The inclination angle between the first inclined plate wall 23 and the horizontal plane is 20°-50°, preferably 30°. A more reasonable installation angle can effectively adjust the cyclone vortex phenomenon generated at the corner end of the classifying chamber 2 .

Compared with the rectangular or square grading chamber 2 commonly used in the prior art, the first sloping plate wall 23 of the utility model replaces the corner of the grading chamber 2 with an inclined first sloping plate wall 23, which reduces the size of the grading chamber. 2. The eddy current dead zone in the upper left corner greatly reduces the eddy current loss; improves the classification efficiency of materials;

In the utility model, the powder material diffused through the dispersing disc 3 falls to the second inclined plate wall 24 and further diffuses, and the fully diffused powder material passes through the air outlet of the air inlet pipe at the lower part of the classification chamber 2 under the action of gravity, It is convenient for secondary classification.

The degree of separation and dispersion of materials determines the classification efficiency. In order to obtain higher classification efficiency, it is necessary to separate and disperse the materials as much as possible. Therefore, a dispersing disc 3 is installed at the inlet of the classification chamber 2.

The dispersing disc 3 is obliquely installed at the feed inlet 21 in the classifying chamber 2 (shown as a slope with high left and low right).

Preferably, the dispersing disc 3 is made of a steel plate with several ventilation holes; Dispersed plate structure, this embodiment can avoid the problem of excessive pressure loss to the airflow.

Preferably, the inclination angle of the dispersing disc 3 is 20°-40°; preferably about 30°, a reasonable inclination angle of the dispersing disc can effectively reduce the resistance to the air and improve the separation and dispersion efficiency of materials.

The circulation pipe 5 is used to communicate with the air inlet of the blower fan 4 and the air outlet of the settling chamber 6, the hopper 7 is arranged at the bottom of the settling chamber 6, and the hopper 7 is communicated with the bottom of the settling chamber 6, and is used to clean the settling chamber 6. The particles with smaller diameter falling inside are collected.

In this embodiment, the settling chamber is preferably designed as a cuboid structure.

Moreover, one settling chamber can be provided, or a plurality of settling chambers arranged side by side and connected can be arranged according to actual needs, which is convenient for industrial application.

The settling chamber 6 is equipped with a plurality of deflectors 8 for flow guide; the deflectors 8 can make the airflow entering the settling chamber 6 more stable, which is beneficial to the settlement of split particles and improves the classification accuracy.

Preferably, the deflector 8 of the present invention is a louver-like structure.

Preferably, a plurality of deflectors 8 of the present invention are sequentially installed inside the settling chamber 6 at intervals, which can further improve the classification accuracy of powder materials.

The deflector 9 is obliquely welded at the air inlet duct.

Preferably, the deflector 9 is a smooth steel plate at an angle of 30 degrees with the horizontal plane, and the deflector 9 is installed on the bottom of the air outlet of the air inlet duct at the bottom of the classification chamber by welding. The air in the classifying chamber 2 produces a diversion effect, which prevents the air flow from becoming turbulent due to the high-speed flowing air vertically colliding with the wall of the device.

The classification process of the vertical flow type gravity air classifier of this patent is as follows:

Powder materials with different particle sizes enter the classification chamber from the feed port, and the materials first fall on the dispersing disk, and then gradually spread along the dispersing disk. The dispersed powder particles are in full contact with the air. Under the action of fluid drag and gravity, the trajectory of the powder particles will change, and some smaller particles will directly enter the settling chamber with the air. Under the action of the deflector, the airflow will It will become more stable and eventually fall into the hopper after settling. The powder material diffused through the dispersing disc 3 will fall to the second slant plate wall for further diffusion. At this time, a part of the small particles mixed with the large particles will enter the settling chamber with the air flow, and the large particles will continue to fall until the position of the air outlet of the circulating fan. At this time, the small particles adhering to the large particles will undergo secondary sorting under the action of the airflow, and finally the small particles will enter the settling chamber, and the large particles will be discharged from the discharge port.

Adopt above-mentioned technical scheme, the technical effect that the utility model produces has:

(1) The first inclined plate wall reduces the eddy current dead zone in the upper left corner of the classification chamber, which greatly reduces the eddy current loss;

(2) The new structure makes it possible to install a longer dispersing disk here, and the powder material can be more fully diffused on the extended dispersing disk 3, and there is only one dispersing disk here, which has little hindrance to the air , so that the pressure loss is relatively small;

(3) The powder material diffused by the dispersing disc falls to the second inclined plate wall and further diffuses, and the fully diffused powder material passes through the air outlet of the fan under the action of gravity, which is convenient for secondary classification;

(4) The deflector has a diversion effect on the air that has just entered the classification chamber, avoiding the high-speed flowing air vertically hitting the wall of the device and making the air flow turbulent, making the air flow relatively stable, which is convenient for the air flow to drive the powder particles Go to the settling chamber for classification;

(5) The airflow from the classification chamber becomes more stable under the action of multiple deflectors, the degree of turbulence is reduced, which is beneficial to settlement and improves the classification accuracy.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the embodiments of the present utility model Scope of technical solutions.

Claims (10)

1. a vertical flow pattern gravity-type air classifier, it is characterised in that: include body and be installed on the grading room on described body, break up dish, blower fan, circulating line, expansion chamber and hopper；

Described grading room connects with the air inlet of expansion chamber, described grading room outer upper is provided with charging aperture, discharging opening it is provided with bottom grading room, grading room bottom side is connected with the air outlet of blower fan by intake stack, described circulating line is for connecting the air inlet of described blower fan and the air outlet of expansion chamber, described hopper is arranged at bottom expansion chamber, and hopper connects with bottom expansion chamber, is provided with the multiple deflectors for water conservancy diversion in described expansion chamber；

Described break up the charging aperture place that dish is inclined and mounted in described grading room, described grading room outer upper is provided with the first swash plate wall, the second swash plate wall it is provided with inside grading room, described first swash plate wall is positioned at the opposite side of described expansion chamber entrance, described second swash plate wall is positioned at the opposite side of described first swash plate wall, and the second swash plate wall top is connected with expansion chamber entrance.

2. vertical flow pattern gravity-type air classifier according to claim 1, it is characterised in that: described first swash plate wall and the second swash plate wall be arranged in parallel.

3. vertical flow pattern gravity-type air classifier according to claim 1, it is characterised in that: described expansion chamber is at least provided with one.

4. vertical flow pattern gravity-type air classifier according to claim 1, it is characterised in that: described expansion chamber is rectangular structure.

5. vertical flow pattern gravity-type air classifier according to claim 1, it is characterised in that: described deflector is blind shaped structure.

6. vertical flow pattern gravity-type air classifier according to claim 1 or 5, it is characterised in that: the plurality of deflector interval successively is installed on inside expansion chamber.

7. vertical flow pattern gravity-type air classifier according to claim 1, it is characterised in that: described in break up dish and made with the steel plate of some air vents by one piece.

8. the vertical flow pattern gravity-type air classifier according to claim 1 or 7, it is characterised in that: described in break up dish angle of inclination be 20 degree-40 degree.

9. the vertical flow pattern gravity-type air classifier according to claim 1-5,7 any one, it is characterised in that: also including flow deflector, described flow deflector oblique weld is at intake stack place.

10. vertical flow pattern gravity-type air classifier according to claim 9, it is characterised in that: described flow deflector is the smooth steel plate horizontal by 30 degree of angles.