Vertical mill air outlet structure

Abstract

The utility model belongs to an air outlet structure of a vertical mill in the technical field of material crushing vertical mills. The air outlet is located above the vertical mill and comprises an air outlet volute (1), an air outlet inlet section (2) and an air outlet outlet section (3), the air outlet volute (1) comprises a spiral air outlet pipeline, one end of the air outlet pipeline is communicated with the air outlet inlet section (2), and the other end of the air outlet volute pipeline is communicated with the air outlet outlet section (3). The air outlet structure of the vertical mill is simple in structure, airflow direction of the air outlet can be straightened out, bias flow caused by airflow turbulence and mutual collision is avoided, energy loss is reduced, air speed is more uniform after airflow whirlwind, and hot air pressure loss is reduced, so that negative pressure of a fan is reduced, and energy consumption of the fan is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of material crushing vertical mills, and more specifically relates to an air outlet structure of a vertical mill. Background Art

[0002] Vertical mills are key equipment in the cement production process, grinding raw materials to produce cement. Traditional vertical mill air outlet designs have several issues, such as excessively high air speeds causing material deflection and high hot air pressure loss. This not only affects production efficiency but can also damage the equipment.

[0003] In the prior art, there is a technology named "A vertical mill for processing building material cement and its use method" and publication number "CN115445703A". This technology relates to the field of cement processing technology, and in particular to a vertical mill for processing building material cement, comprising: a vertical mill body, a feed port fixedly provided on one side surface of the vertical mill body, and the bottom of the feed port is funnel-shaped, and the feed port is connected to the discharge port through a downwardly inclined pipe; a powder classifier, the powder classifier is fixedly arranged at the upper end of the vertical mill body; a crushing mechanism, the crushing mechanism is fixedly arranged inside the vertical mill body; a grinding mechanism, the grinding mechanism is integrated with the vertical mill body, and an air pump introduces hot air from the hot air blower into the grinding chamber. At this time, the air is ejected through the gap between the annular corrugated plate of the dust-proof jet annular plate and the leak-proof enclosure, which can blow the powdered material away from under the grinding roller. The powdered material directly floats up and enters the powder classifier under the action of the hot air, and other materials will enter under the grinding roller for grinding under the action of centrifugal force.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies in the existing technology, a vertical mill outlet structure with a simple structure is provided, which can straighten out the airflow direction of the air outlet, avoid airflow turbulence and deviation caused by mutual collision, reduce energy loss, make the wind speed more uniform after the air flow cyclone, reduce the hot air pressure loss, thereby reducing the fan negative pressure and reducing the fan energy consumption.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0007] The utility model is a vertical mill air outlet structure, the air outlet is located above the vertical mill, the air outlet comprises an air outlet volute, an air outlet inlet section, and an air outlet outlet section, the air outlet volute comprises a spiral air outlet pipeline, one end of the air outlet pipeline is connected to the air outlet inlet section, and the other end of the air outlet volute pipeline is connected to the air outlet outlet section.

[0008] The air outlet inlet section is connected to the vertical mill powder separator housing, and the air outlet outlet section is connected to the finished product collection pipeline.

[0009] The air outlet volute, the air outlet inlet section and the air outlet outlet section are an integrated structure.

[0010] The air outlet inlet section is located at the lower end of the air outlet volute, and the air outlet inlet section is connected to the lower end of the spiral air outlet duct. The air outlet outlet section is located at the upper end of the air outlet volute, and the air outlet inlet section is connected to the upper end of the spiral air outlet duct.

[0011] The air outlet volute is configured to have an air outlet duct extending from the air outlet inlet section to the air outlet outlet section in a spiral ascending structure.

[0012] The air outlet is a structure made of metal material.

[0013] A powder classifier rotor is arranged inside the vertical mill powder classifier housing.

[0014] The material entering the air outlet from the vertical mill classifier housing is arranged to be able to rotate along the tangent of the air outlet volute 1 and pass through the air outlet pipeline.

[0015] The technical solution of this utility model is adopted, and the working principle and beneficial effects are as follows:

[0016] The vertical mill air outlet structure described in the present invention improves the structure of the vertical mill air outlet. The air outlet is arranged at the uppermost end of the vertical mill. The fine powder sent out by the vertical mill powder classifier continues upward after passing through the powder classifier rotor and enters the air outlet. The air outlet includes an air outlet volute, an air outlet inlet section, and an air outlet outlet section. The air outlet volute includes a spiral air outlet duct. The structural design of the air outlet volute is based on the following ideas: Reduce wind speed: By optimizing the air outlet design, the dispersion of materials in high-speed airflow is reduced, and the material collection efficiency is improved. Reduce deviation: Improve the distribution of materials at the air outlet, reduce the deviation of materials caused by excessive wind speed, and ensure that the materials are evenly distributed. Reduce hot air pressure loss: Reduce the resistance of hot air at the air outlet through design, reduce energy loss, and improve the energy efficiency of the system. The air outlet is designed to be a volute type, so that the airflow carrying the material from the hot air rotates out along the tangent direction of the volute. The rotating airflow presents a spiral, the airflow direction becomes unified, the wind speed is more uniform, the wind speed deviation is reduced, and the energy loss of the airflow is reduced. After the hot air carries the logistics, it passes through the powder classifier rotor and continues to enter the air outlet. Under the action of the outlet volute, the hot air carries the logistics and rotates out along the tangent direction of the volute, straightening out the direction and path of the airflow, avoiding the turbulence of the airflow and the energy loss caused by mutual collision. At the same time, the wind speed is uniform, which reduces the deviation flow, thereby reducing the negative pressure of the hot air and the energy consumption of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 This is a structural diagram of the vertical mill air outlet structure described in the utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the vertical mill air outlet structure of the present invention;

[0020] Figure 3 This is a structural schematic diagram of the vertical mill air outlet structure of the utility model when it is arranged at the upper end of the vertical mill powder classifier housing;

[0021] The marks in the attached drawings are: 1. air outlet volute; 2. air outlet inlet section; 3. air outlet outlet section; 4. air outlet; 5. vertical mill separator housing. DETAILED DESCRIPTION

[0022] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connections of the various components involved, the functions and working principles of the various components, etc., by referring to the accompanying drawings.

[0023] As attached Figure 1 -Attached Figure 3As shown, the utility model is a vertical mill air outlet structure, in which the air outlet is located above the vertical mill, and the air outlet includes an air outlet volute 1, an air outlet inlet section 2, and an air outlet outlet section 3. The air outlet volute 1 includes a spiral air outlet duct, one end of the air outlet duct is connected to the air outlet inlet section 2, and the other end of the air outlet volute duct is connected to the air outlet outlet section 3. The above structure proposes an improved technical solution to the shortcomings of the existing technology. When setting up the structure, the structure of the air outlet of the vertical mill is improved, and the air outlet is arranged at the uppermost end of the vertical mill. The fine powder sent out by the vertical mill powder classifier continues upward after passing through the powder classifier rotor and enters the air outlet. The air outlet includes an air outlet volute 1, an air outlet inlet section 2, and an air outlet outlet section 3. The air outlet volute 1 includes a spiral air outlet duct. The structural design of the air outlet volute 1 is based on the following ideas: Reduce wind speed: By optimizing the air outlet design, reduce the dispersion of materials in high-speed airflow and improve the material collection efficiency. Reduce deviation: Improve the distribution of materials at the air outlet, reduce material deviation caused by excessively high wind speed, and ensure uniform distribution of materials. Reduce hot air pressure loss: Reduce the resistance of hot air at the air outlet through design, reduce energy loss, and improve the energy efficiency of the system. In this way, the air outlet is designed to be volute-type, so that the airflow of hot air carrying materials rotates out along the tangential direction of the volute. The rotating airflow presents a spiral, the direction of the airflow becomes unified, the wind speed becomes more uniform, the wind speed deviation is reduced, and the energy loss of the airflow is reduced. After the airflow of hot air carrying the logistics passes through the rotor of the powder classifier, it continues to enter the air outlet upward. Under the spatial design of the outlet volute 1, the airflow of hot air carrying the logistics rotates out along the tangential direction of the volute, straightening the direction and path of the airflow, avoiding the turbulence of the airflow and the energy loss of mutual collision. At the same time, the wind speed is uniform, the deviation is reduced, thereby reducing the negative pressure of the hot air and reducing the energy consumption of the fan. The vertical mill air outlet structure described in the utility model has a simple structure and can straighten the airflow direction of the air outlet, avoid airflow turbulence and deviation caused by mutual collision, reduce energy loss, and after the air flow cyclone, the wind speed is more uniform, reducing the hot air pressure loss, thereby reducing the fan negative pressure and reducing the fan energy consumption.

[0024] The air outlet inlet section 2 is connected to the vertical mill powder separator housing, and the air outlet section 3 is connected to the finished product collection pipe. In the above structure, the vertical mill powder separator housing is used to deliver the material, which is carried out by the air flow, and the finished product collection pipe is used to transport the delivered material to the corresponding collection component.

[0025] The air outlet volute 1, the air outlet inlet section 2, and the air outlet outlet section 3 are an integrated structure. In the above structure, the air outlet is processed and formed in one piece, which is simple in process and low in cost.

[0026] The outlet inlet section 2 is located at the lower end of the outlet volute 1 and communicates with the lower end of the spiral outlet duct. The outlet outlet section 3 is located at the upper end of the outlet volute 1 and communicates with the upper end of the spiral outlet duct. With this structure, the outlet duct is specifically designed so that the hot air carrying the logistics flow rotates out along the tangent direction of the volute, straightening the direction and path of the airflow, avoiding airflow turbulence and energy loss from collisions. At the same time, the wind speed is uniform, reducing bias flow, thereby reducing the negative pressure of the hot air and lowering the fan energy consumption.

[0027] The outlet volute 1 has an air outlet pipe arranged in a spiral ascending structure from the outlet inlet section 2 to the outlet outlet section 3. In the above structure, the hot air carrying the logistics flow rotates out along the tangential direction of the volute, and on the other hand, the direction of the air flow is from bottom to top.

[0028] The air outlet is constructed of metal. This structure provides excellent strength, ensuring long-term use and reducing the need for replacement. The air outlet is bolted to the upper end of the vertical mill separator housing. A separator rotor is housed within the vertical mill separator housing. The separator rotor is used to transport material from the separator into the air outlet.

[0029] The material entering the air outlet from the vertical mill classifier housing is arranged to be able to rotate along the tangent of the air outlet volute 1 and pass through the air outlet pipeline.

[0030] The vertical mill air outlet structure described in the present invention improves the structure of the vertical mill air outlet during structural setting. The air outlet is arranged at the uppermost end of the vertical mill. The fine powder sent out by the vertical mill powder classifier continues upward after passing through the powder classifier rotor and enters the air outlet. The air outlet includes an air outlet volute 1, an air outlet inlet section 2, and an air outlet outlet section 3. The air outlet volute 1 includes a spiral air outlet pipe. The structural design of the air outlet volute 1 is based on the following ideas: Reduce wind speed: By optimizing the air outlet design, the dispersion of materials in high-speed airflow is reduced, and the material collection efficiency is improved. Reduce deviation: Improve the distribution of materials at the air outlet, reduce the deviation of materials caused by excessively high wind speed, and ensure that the materials are evenly distributed. Reduce hot air pressure loss: Through the structural design of the air outlet, the resistance of hot air at the air outlet is effectively reduced, energy loss is reduced, and the energy efficiency of the system is improved. In this way, the air outlet is designed as a volute, allowing the hot air carrying the material to rotate out along the tangential direction of the volute. The rotating airflow presents a spiral, the airflow direction becomes unified, the wind speed is more uniform, the wind speed deviation is reduced, and the energy loss of the airflow is reduced. After the hot air carries the material through the powder classifier rotor, it continues upward into the air outlet. Due to the spatial design of the air outlet volute 1, the hot air carries the material flow and rotates out along the tangential direction of the volute, straightening the direction and path of the airflow, avoiding airflow turbulence and energy loss due to mutual collision. At the same time, the wind speed is uniform, the deviation is reduced, thereby reducing the negative pressure of the hot air and reducing the energy consumption of the fan.

[0031] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A vertical mill air outlet structure, characterized by: The air outlet is located above the vertical mill, and the air outlet comprises an air outlet volute (1), an air outlet inlet section (2), and an air outlet outlet section (3). The air outlet volute (1) comprises a spiral air outlet pipeline, one end of the air outlet pipeline is connected to the air outlet inlet section (2), and the other end of the air outlet volute pipeline is connected to the air outlet outlet section (3).

2. The vertical mill air outlet structure according to claim 1, characterized in that: The air outlet inlet section (2) is connected to the vertical mill powder separator housing, and the air outlet outlet section (3) is connected to the finished product collection pipeline.

3. The vertical mill air outlet structure according to claim 1, characterized in that: The air outlet volute (1), the air outlet inlet section (2), and the air outlet outlet section (3) are an integrated structure.

4. The vertical mill air outlet structure according to claim 1 or 2, characterized in that: The air outlet inlet section (2) is located at the lower end of the air outlet volute (1), and the air outlet inlet section (2) is connected to the lower end of the spiral air outlet duct. The air outlet outlet section (3) is located at the upper end of the air outlet volute (1), and the air outlet inlet section (2) is connected to the upper end of the spiral air outlet duct.

5. The vertical mill air outlet structure according to claim 1 or 2, characterized in that: The air outlet volute (1) is provided with an air outlet pipeline in a spiral ascending structure from the air outlet inlet section (2) to the air outlet outlet section (3).

6. The vertical mill air outlet structure according to claim 1 or 2, characterized in that: The air outlet is a structure made of metal material.

7. The vertical mill air outlet structure according to claim 2, characterized in that: A powder classifier rotor is arranged inside the vertical mill powder classifier housing.

8. The vertical mill air outlet structure according to claim 1 or 2, characterized in that: The material entering the air outlet from the vertical mill powder separator housing is arranged to be capable of rotating along the tangent of the air outlet volute (1) and passing through the air outlet pipeline.

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