Coal mill inlet dust removal device
By designing a dust removal device at the inlet of the coal mill and using a negative pressure fan and a bag filter to treat the dust, the dust pollution problem was solved, and environmental pollution and health risks were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG HUADIAN KASHI THERMAL POWER CO LTD
- Filing Date
- 2025-08-10
- Publication Date
- 2026-07-14
Smart Images
Figure CN224486244U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mills, specifically to a dust removal device for the inlet of a coal mill. Background Technology
[0002] The working principle of a coal mill mainly includes four stages: crushing, grinding, grading, and powder collection. In the crushing stage, the raw ore is crushed by the crusher, and the material enters the grinding roller channel, where it is continuously squeezed, ground, cut, and crushed under the pressure of the grinding rollers. High-speed airflow at the duct blows the ground material up, while coarser material is blown back to the grinding disc for regrinding. Simultaneously, suspended materials can be dried, fine powder enters the classifier for grading, and qualified powder is collected by the collector to become the finished product.
[0003] Taking the existing HP bowl-type medium-speed coal mill as an example, such as Figure 1 As shown: The high-speed coal mill body a is fed through the coal inlet: coal drop pipe b. When the coal drop pipe b is fed, a large amount of coal dust is generated, which will spread to the outside world, pollute the environment, and also aggravate the infection of pneumoconiosis by workers. Utility Model Content
[0004] The purpose of this invention is to provide a dust removal device for the inlet of a coal mill to solve the defects mentioned in the background art.
[0005] To achieve the above objectives, a coal mill inlet dust removal device is provided, including a coal churn, a coal outlet at the bottom of the coal churn where the coal is ground by a coal grinding assembly inside the coal mill, a dust removal box installed at the top of the coal churn, and a sealing cover covering the surface of the dust removal box. A coal inlet channel is installed on the sealing cover, and a dust suction port is opened on the side wall of the dust removal box.
[0006] A dust collection assembly is installed on the outside of the dust collection box. The dust collection assembly includes a dust suction port, an air compressor box, a negative pressure pipe and a negative pressure fan connecting pipe. The negative pressure pipe is connected to the suction end of the negative pressure fan through the negative pressure fan connecting pipe, and the exhaust end of the negative pressure fan is connected to the external bag filter.
[0007] Preferably, a limiting support plate is welded to the upper outer side of the coal chute, and the bottom of the fixing cylinder is supported by the limiting support plate. At the same time, the fixing cylinder wraps around the outer side of the coal chute and is fixed by multiple sets of bolts.
[0008] Preferably, the top of the fixed cylinder is welded and fixed to the dust collection box, and the top of the dust collection box is fixed to the sealing cover by multiple sets of bolts. At the same time, an annular positioning groove is opened on the outer side of the bottom of the sealing cover.
[0009] Preferably, the cross-section of the dust suction port is inclined downward, and the dust suction ports are arranged in four groups evenly distributed on the outside of the dust collection box. At the same time, the outside of each group of dust suction ports is screwed and covered by an air compressor box.
[0010] Preferably, four sets of air compressor boxes are evenly arranged on the outside of the dust collector box, and the air compressor boxes and the dust collector box are sealed together by a sealing gasket. At the same time, the four sets of air compressor boxes are connected by a negative pressure pipe.
[0011] Preferably, the negative pressure pipe is arranged in a ring shape, and the cross-section of the negative pressure pipe and the dust collection box is a concentric circle structure. Under the action of the negative pressure fan, the inside of the negative pressure pipe adsorbs and removes dust from the inside of the dust collection box. Beneficial effects
[0012] The flying coal dust enters the air compressor box through the dust suction port under the action of negative pressure. Then, through the negative pressure pipe and the fan connection pipe, and under the action of the negative pressure fan, the dust airflow enters the bag filter for subsequent treatment. This can prevent the flying dust from entering the outside air and causing environmental pollution, and can also reduce the risk of employees contracting pneumoconiosis. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of a coal mill in the prior art.
[0014] Figure 2 This is a front view schematic diagram of the structure of this utility model;
[0015] Figure 3 This is a schematic diagram of the dust removal component structure of this utility model;
[0016] Figure 4 This is a top view of the dust removal component of this utility model.
[0017] The following are the labels in the diagram: 1. Coal chute; 2. Limiting support plate; 3. Fixed cylinder; 4. Dust collector box; 5. Sealing cover; 6. Coal inlet channel; 7. Dust removal assembly; 71. Dust suction port; 72. Air compressor box; 73. Negative pressure pipe; 74. Negative pressure fan connecting pipe. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Please see Figure 1-4This utility model provides a dust removal device for the inlet of a coal mill, including a coal drop pipe 1. The coal outlet at the bottom of the coal drop pipe 1 is ground by the coal grinding components inside the coal mill. A dust removal box 4 is installed on the top of the coal drop pipe 1, and the surface of the dust removal box 4 is covered with a sealing cover 5. At the same time, a coal inlet channel 6 is installed on the sealing cover 5, and a dust suction port 71 is opened on the side wall of the dust removal box 4.
[0020] A dust collection assembly 7 is installed on the outside of the dust collection box 4. The dust collection assembly 7 includes a dust suction port 71, an air compressor box 72, a negative pressure pipe 73, and a negative pressure fan connecting pipe 74. The negative pressure pipe 73 is connected to the suction end of the negative pressure fan through the negative pressure fan connecting pipe 74, and the exhaust end of the negative pressure fan is connected to the external bag filter.
[0021] When in use, the coal material enters the inside of the coal drop pipe 1 through the coal inlet channel 6 and the dust removal box 4. The coal material to be ground is placed inside the coal mill through the coal drop pipe 1 for grinding.
[0022] When the coal is placed inside the dust collector 4, the flying coal dust enters the air compressor 72 through the dust suction port 71 under the action of negative pressure. Then, through the negative pressure pipe 73 and the fan connection pipe 74, and under the action of the negative pressure fan, the dust airflow enters the bag filter for subsequent processing. This can prevent the flying dust from entering the outside air and causing environmental pollution, and can also reduce the risk of employees contracting pneumoconiosis.
[0023] As a preferred embodiment, a limiting support plate 2 is welded to the upper outer side of the coal chute 1, and the bottom of the fixing cylinder 3 is supported by the limiting support plate 2. At the same time, the fixing cylinder 3 wraps around the outer side of the coal chute 1 and is fixed by multiple sets of bolts.
[0024] like Figure 2 As shown: The fixed cylinder 3 wraps around the outside of the coal chute 1 and is fixed by multiple sets of bolts, thereby completing the fixed installation work between the coal chute 1 and the dust collector 4.
[0025] In a preferred embodiment, the top of the fixed cylinder 3 is welded to the dust collection box 4, and the top of the dust collection box 4 is fixed to the sealing cover 5 by multiple sets of bolts. At the same time, an annular positioning groove is opened on the outer side of the bottom of the sealing cover 5.
[0026] like Figure 2 As shown: The dust collector 4 is detachable on the outside of the coal chute 1, which facilitates the cleaning of the inside of the dust collector 4.
[0027] In a preferred embodiment, the cross-section of the dust suction port 71 is inclined downward, and the dust suction port 71 is configured as four groups evenly distributed on the outside of the dust collection box 4. At the same time, the outside of each group of dust suction ports 71 is screwed and covered by an air compressor box 72.
[0028] like Figure 2 As shown: The outside of each set of dust suction ports 71 is covered by an air compressor box 72. The dust suction ports 71 are set at an angle downward to prevent falling coal from entering the interior of the dust suction ports 71 and causing blockage.
[0029] In a preferred embodiment, four sets of air compressor boxes 72 are evenly arranged on the outside of the dust collector box 4, and the air compressor boxes 72 and the dust collector box 4 are sealed together by a sealing gasket. At the same time, the four sets of air compressor boxes 72 are connected to each other by a negative pressure pipe 73.
[0030] like Figure 3-4 As shown: The four sets of air compressor boxes 72 are connected by negative pressure pipes 73. A negative pressure is formed inside the negative pressure pipes 73, which can adsorb and remove the flying dust inside the dust collector box 4.
[0031] As a preferred embodiment, the negative pressure pipe 73 is arranged in a ring shape, and the cross-section of the negative pressure pipe 73 and the dust collection box 4 are concentric circles. The inside of the negative pressure pipe 73 adsorbs and removes dust from the inside of the dust collection box 4 under the action of the negative pressure fan.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A dust removal device at the inlet of a coal mill, comprising a coal chute (1), characterized in that: A dust collector (4) is installed on the top of the coal drop pipe (1), and a sealing cover (5) is placed on the surface of the dust collector (4). A coal inlet channel (6) is installed on the sealing cover (5). A dust suction port (71) is opened on the side wall of the dust collector (4). A dust removal assembly (7) is installed on the outside of the dust collector (4). A limiting support plate (2) is welded to the upper outside of the coal drop pipe (1), and the bottom of the fixing cylinder (3) is supported by the limiting support plate (2). The fixing cylinder (3) is wrapped around the outside of the coal drop pipe (1) and fixed by multiple sets of bolts. The top of the fixing cylinder (3) is welded to the dust collector (4), and the top of the dust collector (4) is fixed to the sealing cover (5) by multiple sets of bolts. An annular positioning groove is opened on the bottom outside of the sealing cover (5).
2. The dust removal device at the inlet of a coal mill according to claim 1, characterized in that: The dust removal assembly (7) includes a dust inlet (71), an air compressor box (72), a negative pressure pipe (73), and a negative pressure fan connecting pipe (74). The negative pressure pipe (73) is connected to the suction end of the negative pressure fan through the negative pressure fan connecting pipe (74), and the exhaust end of the negative pressure fan is connected to the external bag filter. The cross-section of the dust inlet (71) is inclined downward, and the dust inlet (71) is set in four groups evenly distributed on the outside of the dust removal box (4). The outside of each group of dust inlets (71) is screwed and covered by the air compressor box (72).
3. The dust removal device at the inlet of a coal mill according to claim 2, characterized in that: Four sets of air compressor boxes (72) are evenly arranged on the outside of the dust collector box (4), and the air compressor boxes (72) and the dust collector box (4) are sealed together by a sealing gasket. At the same time, the four sets of air compressor boxes (72) are connected to each other by the negative pressure pipe (73).
4. A dust removal device for the inlet of a coal mill according to claim 2 or 3, characterized in that: The negative pressure pipe (73) is arranged in a ring shape, and the cross-section of the negative pressure pipe (73) and the dust collection box (4) are concentric circles.