Ash removal device for cement grinding mill

Abstract

The utility model discloses an ash removal device for a cement mill, which belongs to the field of cement production equipment and comprises a ball mill, a feed port is arranged on the left side of the ball mill, and a discharge port is arranged on the right side of the ball mill. The discharge port is connected with a fan through an air inlet pipe, and the fan is connected with a dust collecting device through an air outlet pipe; the dust collecting device comprises a first conical cylinder, an inner cylinder is arranged in the first conical cylinder, an air inlet is formed in the outer side wall of the first conical cylinder in the tangential direction, and a discharging opening is formed in the bottom of the first conical cylinder; a plurality of side air inlets extending outwards are circumferentially distributed in the top of the inner cylinder in the tangential direction, the outlet ends of the side air inlets are arranged in a second conical cylinder, a small air outlet is formed in the top of the second conical cylinder, and a dust collecting cavity is formed in the bottom of the second conical cylinder; and the plurality of small air outlets are communicated with the large air outlet. Dust in the cement grinding mill can be cleaned and collected, efficient operation of equipment is maintained, product quality is guaranteed, and the requirements for safety and environmental protection are met.

Description

A cement mill dust removal device Technical Field

[0001] This utility model relates to the field of cement production equipment, and in particular to a cement mill dust removal device. Background Technology

[0002] Cement mills are crucial equipment for further pulverizing materials after crushing, with ball mills being one of the preferred options. However, if a large amount of fine powder or scale accumulates inside the ball mill (such as on the liners and grinding media surfaces), it forms a "buffer layer," weakening the impact and grinding effect between the steel balls and the material, leading to reduced grinding efficiency and output. Accumulated ash can also clog the grates in the partition plates, affecting material flow and further exacerbating the decline in grinding capacity. Therefore, it is necessary to regularly clean the ash inside the cement mill to maintain efficient equipment operation, ensure product quality, and meet safety and environmental protection requirements. Based on this, this utility model proposes a cement mill ash cleaning device. Summary of the Invention

[0003] The purpose of this invention is to provide a cement mill dust removal device to solve the problems mentioned above.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a cement mill dust removal device, including a ball mill. The ball mill has a feed inlet on the left side and a first discharge outlet on the right side. The first discharge outlet is connected to a blower through an air inlet pipe, and the blower is connected to a dust collection device through an air outlet pipe.

[0006] The dust collection device includes a first cone, inside which is an inner cylinder. An air inlet is provided on the outer wall of the first cone along the tangential direction, and the air inlet is connected to the air outlet. A second discharge port is provided at the bottom of the first cone, and a collection box is provided below the second discharge port. Several outwardly extending side air inlets are distributed circumferentially along the tangential direction at the top of the inner cylinder. The outlet ends of the side air inlets are placed inside the second cone. A small air outlet is provided at the top of the second cone, and a dust collection chamber is provided at the bottom. Several small air outlets are connected to a large air outlet, which is located at the upper end of the inner cylinder.

[0007] Furthermore, the first conical cylinder and the inner cylinder are concentrically distributed.

[0008] Furthermore, the side air inlet is located in the tangential direction of the second cone.

[0009] Furthermore, a switch door is provided on the outer wall of the ash collection chamber.

[0010] Furthermore, the ash collection chamber is located at the upper end of the first cone.

[0011] Furthermore, the small air outlet is located at the center of the second cone.

[0012] Furthermore, the ball mill contains 25%-45% of its volume of grinding media.

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

[0014] This utility model cement mill dust removal device connects to a dust collection device via a fan. Based on the cyclone separation principle in the collection device, it uses centrifugal force to separate large dust particles. The airflow rotates along the cylinder wall, and the dust is thrown against the wall and falls into the dust hopper, thus achieving the cleaning and collection of dust inside the cement mill, maintaining efficient equipment operation, ensuring product quality, and fulfilling safety and environmental protection requirements. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is a front view of the cement mill dust removal device of this utility model;

[0017] Figure 2 is a schematic diagram of the dust collection device;

[0018] Figure 3 is a cross-sectional view of the dust collection device;

[0019] Figure 4 is a partial structural diagram of the dust collection device;

[0020] Explanation of reference numerals in the attached drawings: 1. Ball mill; 2. Feed inlet; 3. First discharge outlet; 4. Blower; 5. Air outlet pipe; 6. Dust collection device; 7. Air inlet pipe;

[0021] 601, First cone; 602, Air inlet; 603, Inner cylinder; 604, Second discharge outlet; 605, Side air inlet; 606, Second cone; 607, Small air outlet; 608, Large air outlet; 609, Ash collection chamber. Detailed Implementation

[0022] As shown in Figures 1-4, a cement mill cleaning device includes a ball mill 1. The ball mill 1 has a feed inlet 2 on its left side and a first discharge outlet 3 on its right side. The ball mill 1 contains 25%-45% of its volume of grinding media, which may be steel balls, steel segments, or ceramic balls. A motor drives the mill to rotate via a reducer, gears, or belt. Material enters the mill through the feed inlet and mixes with the grinding media. The falling steel balls generate high-frequency impacts on the material, breaking down large particles. Subsequently, the rolling friction between the steel balls and the material, and between the material and the liner, further refines the particles, thus achieving the cement mill operation.

[0023] The first discharge port 3 is connected to a fan 4 via an air inlet pipe 7, and the fan 4 is connected to a dust collection device 6 via an air outlet pipe 5. The dust collection device 6 includes a first cone 601, inside which an inner cylinder 603 is installed, and the first cone 601 and the inner cylinder 603 are concentrically distributed. An air inlet 602 is installed tangentially on the outer wall of the first cone 601, and the air inlet 602 communicates with the air outlet pipe 5. A second discharge port 604 is installed at the bottom of the first cone 601, and a collection box is installed below the second discharge port 604.

[0024] The top of the inner cylinder 603 has several outwardly extending side air inlets 605 distributed circumferentially along the tangential direction. The outlet ends of the side air inlets 605 are located inside the second cone 606, and the side air inlets 605 are located tangentially to the second cone 606. The top of the second cone 606 is equipped with a small air outlet 607, and the bottom is equipped with a dust collection chamber 609. Several of the small air outlets 607 are connected to a large air outlet 608, which is located at the upper end of the inner cylinder 603.

[0025] A switch door is installed on the outer wall of the ash collection chamber 609 to facilitate ash removal.

[0026] The ash collection chamber 609 is located at the upper end of the first cone 601.

[0027] The small air outlet 607 is located at the center of the inside of the second cone 606.

[0028] The operation process of this utility model is as follows:

[0029] First, the blower 4 starts, and the ball mill 1 starts. External air enters the cylinder through the feed inlet 2. As the ball mill 1 rotates, the dust tumbles and is discharged from the first discharge outlet 3 into the dust collection device 6 under the action of the air. Then, the dust-laden air enters the first cone 601 through the air inlet 602. Large dust particles are separated by centrifugal force. The airflow rotates along the cylinder wall, and the dust is thrown against the wall and falls into the second discharge outlet 604 below. Finally, the rising airflow enters the second cone 606 through the side air inlet 605. Similarly, the dust is separated by centrifugal force. The dust is thrown against the wall and falls into the dust collection chamber 609 below. Clean air enters from the small air outlet 607 to the large air outlet 608 and is finally discharged.

[0030] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A cement mill dust removal device, characterized in that: The device includes a ball mill (1), which has a feed inlet (2) on its left side and a first discharge outlet (3) on its right side. The first discharge outlet (3) is connected to a blower (4) via an air inlet pipe (7), and the blower (4) is connected to a dust collection device (6) via an air outlet pipe (5). The dust collection device (6) includes a first cone (601), which has an inner cylinder (603) inside. An air inlet (602) is provided on the outer wall of the first cone (601) along the tangential direction, and the air inlet (602) is connected to the air outlet pipe (5). (601) has a second discharge port (604) at its bottom, and a collection box is provided below the second discharge port (604); the top of the inner cylinder (603) has several outwardly extending side air inlets (605) distributed circumferentially along the tangential direction, and the outlet end of the side air inlets (605) is placed inside the second cone (606), the top of the second cone (606) has a small air outlet (607), and the bottom has a dust collection chamber (609); several small air outlets (607) are connected to a large air outlet (608), and the large air outlet (608) is located at the upper end of the inner cylinder (603).

2. The cement mill dust removal device according to claim 1, characterized in that: The first conical cylinder (601) and the inner cylinder (603) are coaxially distributed.

3. The cement mill dust removal device according to claim 1, characterized in that: The side air inlet (605) is located in the tangential direction of the second cone (606).

4. The cement mill dust removal device according to claim 1, characterized in that: A switch door is provided on the outer wall of the ash collection chamber (609).

5. The cement mill dust removal device according to claim 1, characterized in that: The ash collection chamber (609) is located at the upper end of the first cone (601).

6. The cement mill dust removal device according to claim 1, characterized in that: The small air outlet (607) is located at the center of the second cone (606).

7. The cement mill dust removal device according to claim 1, characterized in that: The ball mill (1) contains grinding media with a volume of 25%-45%.

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