Ventilation auxiliary device of coal mill bin
By designing the ventilation auxiliary devices of the coal mill, including rotary drum, hot air duct, coal inlet pipe, coal outlet pipe, inclined slip pipe and multiple lining sets, the grate blockage in the air-sweep coal mill is solved. The problem of poor ventilation has achieved more efficient coal powder production and lower production costs.
Patent Information
- Application Number
- CN202420690723.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In the long-term use of existing air-sweep coal mills, the grate plate inside the rotary drum is prone to blockage, affecting ventilation in the grinding, resulting in high pressure difference and coarse coal powder from the grinding, affecting fineness control and output.
A ventilation auxiliary device for coal mill silo is designed, including a rotary drum body, hot air duct, coal inlet pipe, coal outlet pipe, inclined slip pipe, stepped corrugated lining plate group, corrugated lining plate group and corrugated graded lining plate group. Through the design of these components, the grate plate is avoided and the ventilation inside the grinding is ensured smooth.
It effectively avoids internal blockage of the mill, ensures smooth ventilation in the mill, improves coal powder production and quality, and reduces energy consumption and production costs.
Smart Images
Figure CN222518791U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal mills, in particular to a ventilation auxiliary device for a coal mill bin. Background Art
[0002] Cement is a powdery hydraulic inorganic cementitious material. It becomes a slurry after adding water and stirring. It can harden in the air or in water, and can firmly bind sand, stone and other materials together. For a long time, it has been widely used in civil engineering, water conservancy, national defense and other projects as an important cementitious material. Coal powder is an important fuel for cement production lines. It mainly plays the role of cement clinker burning, and coal powder is made by grinding coal.
[0003] At present, air-swept coal mills are widely used due to their high efficiency, environmental protection, economy and other characteristics. The main principle is to use a high-speed rotating centrifugal fan to suck the dust and grinding slag generated in the coal mill into the dust collector through a pipe, thereby reducing dust, reducing noise and improving the working environment. However, during the long-term use of the current air-swept coal mill, the grate plate inside the rotating cylinder is prone to blockage, which affects the ventilation in the mill, resulting in an overall high pressure difference in the mill, causing the coal powder out of the mill to be coarse, affecting the control of the fineness of the coal powder out of the mill, and also affecting the output of coal powder. We propose a ventilation auxiliary device for the coal mill bin. Utility Model Content
[0004] The purpose of the utility model is to provide a ventilation auxiliary device for a coal mill bin, which has the advantages of avoiding blockage inside the mill, ensuring smooth ventilation inside the mill, improving the coal powder output and quality of the mill, and reducing energy consumption and production costs. It solves the problem that during the long-term use of the current air-swept coal mill, the grate plate inside the rotating cylinder is prone to blockage, affecting the ventilation inside the mill, resulting in an overall high pressure difference inside the mill, causing the coal powder out of the mill to be coarse, affecting the control of the fineness of the coal powder out of the mill, and also affecting the coal powder output.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ventilation auxiliary device for a coal mill bin, comprising a coal inlet pipe, a hot air pipe, an inclined chute, a rotating cylinder and a coal outlet pipe, wherein the coal inlet pipe and the coal outlet pipe are rotatably installed at both ends of the rotating cylinder, the upper surface of the coal inlet pipe is fixedly connected with the inclined chute, the outer surface of the coal inlet pipe is fixedly connected with a hot air pipe at a position close to the upper surface on the side away from the rotating cylinder, a plurality of stepped corrugated lining groups are equidistantly fixedly installed on the side of the inner wall of the rotating cylinder close to the coal inlet pipe, a plurality of corrugated lining groups and corrugated graded lining groups are equidistantly fixedly installed on the side of the inner wall of the rotating cylinder close to the coal outlet pipe, and the surface of the lining presents a certain inclination angle to form a plurality of stepped structures.
[0006] Preferably, the corrugated lining plate group and the corrugated grading lining plate group are distributed at intervals inside the rotating cylinder.
[0007] Preferably, a windshield is rotatably mounted on the inner wall of the inclined slide pipe.
[0008] Preferably, a coil spring is fixedly connected to the outer surface of the wind deflector.
[0009] Preferably, a rotating shaft is rotatably installed inside the coal inlet pipe, and spiral blades are welded to the outer surface of the rotating shaft.
[0010] Preferably, a reducer is fixedly mounted on the outer surface of the coal inlet pipe, and the end of the reducer output shaft is fixedly connected to the end of the rotating shaft, and a feeding motor is fixedly mounted on the outer surface of the reducer, and the end of the feeding motor output shaft is fixedly connected to the input end of the reducer.
[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0012] 1. The utility model avoids blockage inside the mill, ensures smooth ventilation inside the mill, improves the coal powder output and quality of the mill, and reduces energy consumption and production costs by arranging a rotary cylinder, a hot air pipe, a coal inlet pipe, a coal outlet pipe, an inclined chute, a stepped corrugated lining plate group, a corrugated lining plate group and a corrugated graded lining plate group. The coal blocks slide into the coal inlet pipe from the inclined chute, and then enter the rotary cylinder from the coal inlet pipe. At the same time, the hot air inside the hot air pipe enters the rotary cylinder from the coal inlet pipe together with the coal blocks, and the coal blocks are dried. When the coal blocks move to the stepped corrugated lining plate group, the surface of the lining plate presents a certain inclination angle, forming a plurality of stepped structures. The advantage of this structure is that it can effectively increase the running height of the ball carrier degree, thereby enhancing the impact force of the steel balls and breaking the coal blocks. This area of the rotary cylinder is equivalent to the coarse grinding bin of the original mill. When the broken small coal blocks move to the corrugated lining group and the corrugated grading lining group, the corrugated grading lining group makes the steel balls inside the rotary cylinder decrease in sequence along the direction of the coal outlet pipe through the coal inlet pipe, so as to give full play to the role of various specifications of steel balls in crushing and grinding coal blocks. At the same time, the corrugated lining group and the corrugated grading lining group are distributed at intervals so that the coal blocks can be fully crushed and ground. This area of the rotary cylinder is equivalent to the fine grinding bin of the original mill, which eliminates the partition plate originally composed of the grate plate to separate the coarse grinding bin and the fine grinding bin, so there is no problem of grate plate blockage, so that the hot air inside the rotary cylinder can flow smoothly.
[0013] 2. The utility model achieves the effect of avoiding feed blockage by arranging a feeding motor, a rotating shaft and spiral blades. The feeding motor and the reducer jointly drive the rotating shaft and the spiral blades to rotate. The spiral blades force the coal blocks in the coal feed pipe to enter the rotating cylinder to avoid feed blockage.
[0014] 3. The utility model achieves the effect of preventing hot air from being discharged from the inclined chute by arranging a wind shield and a coil spring. When the coal blocks enter the coal inlet pipe from the inclined chute, the wind shield rotates and the coil spring is compressed. When no coal blocks enter the inclined chute, the compressed coil spring is released, and the wind shield rotates to block the inside of the inclined chute to prevent hot air from flowing out. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;
[0016] Figure 2 This is a schematic diagram of the main structure of the utility model;
[0017] Figure 3 It is a schematic diagram of the main cross-sectional structure of the utility model.
[0018] Figure numerals: 1. coal inlet pipe; 2. reducer; 3. feeding motor; 4. hot air pipe; 5. inclined chute; 6. rotating cylinder; 7. coal outlet pipe; 8. spiral blade; 9. rotating shaft; 10. wind shield; 11. spiral spring; 12. stepped corrugated lining plate group; 13. corrugated lining plate group; 14. corrugated graded lining plate group. DETAILED DESCRIPTION
[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0020] Embodiment 1
[0021] like Figure 1-Figure 3 As shown, the utility model proposes a ventilation auxiliary device for a coal mill bin, comprising a coal inlet pipe 1, a hot air pipe 4, an inclined chute 5, a rotating cylinder 6 and a coal outlet pipe 7. The coal inlet pipe 1 and the coal outlet pipe 7 are rotatably installed at both ends of the rotating cylinder 6. The upper surface of the coal inlet pipe 1 is fixedly connected with the inclined chute 5, and the side of the outer surface of the coal inlet pipe 1 facing away from the rotating cylinder 6 is fixedly connected with the hot air pipe 4 near the upper surface. A plurality of stepped corrugated lining plate groups 12 are equidistantly fixedly installed on the inner wall of the rotating cylinder 6 near the coal inlet pipe 1. Each stepped corrugated lining plate group 12 is composed of a plurality of stepped corrugated plates, and are equidistantly fixedly installed on the inner wall of the rotating cylinder 6 in a circular array.
[0022] A plurality of corrugated lining groups 13 and corrugated grading lining groups 14 are equidistantly fixedly installed on one side of the inner wall of the rotating cylinder 6 near the coal outlet pipe 7. Steel balls for crushing and grinding coal blocks are arranged at the positions of the step corrugated lining group 12, the corrugated lining group 13 and the corrugated grading lining group 14 inside the rotating cylinder 6. During the rotation of the rotating cylinder 6, the coal blocks are crushed and ground by the steel balls. Each corrugated lining group 13 is composed of a plurality of corrugated lining plates, which are equidistantly fixedly installed in a circular array on the inner wall of the rotating cylinder 6. Each corrugated grading lining group 14 is composed of a plurality of corrugated grading lining plates, which are equidistantly fixedly installed in a circular array on the inner wall of the rotating cylinder 6. The corrugated lining group 13 and the corrugated grading lining group 14 are spaced apart inside the rotating cylinder 6.
[0023] When the utility model is in use, the coal blocks slide into the coal inlet pipe 1 from the inclined chute 5, and enter the rotary cylinder 6 from the coal inlet pipe 1. At the same time, the hot air in the hot air pipe 4 enters the rotary cylinder 6 from the coal inlet pipe 1 together with the coal blocks, and the coal blocks are dried. When the coal blocks move to the stepped corrugated lining plate group 12, the surface of the lining plate presents a certain inclination angle, forming a plurality of stepped structures. The advantage of this structure is that it can effectively increase the running height of the ball, thereby enhancing the impact force of the steel ball, so that the coal blocks are broken. This area of the rotary cylinder 6 is equivalent to the coarse grinding bin of the original mill, and the broken small coal blocks move to the corrugated lining plate group 12. When the corrugated grading liner group 13 and the corrugated grading liner group 14 are in place, the corrugated grading liner group 14 makes the steel balls inside the rotary cylinder 6 decrease in sequence along the direction of the coal outlet pipe 7 from the coal inlet pipe 1, so as to give full play to the role of various specifications of steel balls in crushing and grinding coal blocks. At the same time, the corrugated liner group 13 and the corrugated grading liner group 14 are distributed at intervals so that the coal blocks can be fully crushed and ground. This area of the rotary cylinder 6 is equivalent to the fine grinding bin of the original mill, and the partition plate originally composed of the grate plate for separating the coarse grinding bin and the fine grinding bin is omitted. Therefore, there is no problem of grate plate blockage, so that the hot air inside the rotary cylinder 6 can flow smoothly, and the coal powder is discharged from the coal outlet pipe 7 along with the hot air.
[0024] Embodiment 2
[0025] like Figure 1 and Figure 3As shown, the utility model proposes a ventilation auxiliary device for a coal mill bin. Compared with the first embodiment, the present embodiment also includes a wind shield 10 rotatably installed on the inner wall of the inclined chute 5. The inclined chute 5 is a square tube. The wind shield 10 is in a vertical state, and its height is greater than the inner diameter of the inclined chute 5. A spiral spring 11 is fixedly connected to the outer surface of the wind shield 10. A rotating shaft 9 is rotatably installed inside the coal inlet pipe 1. A spiral blade 8 is welded on the outer surface of the rotating shaft 9. A reducer 2 is fixedly installed on the outer surface of the coal inlet pipe 1, and the end of the output shaft of the reducer 2 is fixedly connected to the end of the rotating shaft 9. A feeding motor 3 is fixedly installed on the outer surface of the reducer 2, and the end of the output shaft of the feeding motor 3 is fixedly connected to the input end of the reducer 2. The feeding motor 3 and the reducer 2 jointly drive the rotating shaft 9 and the spiral blade 8 to rotate, and the spiral blade 8 forces the coal blocks in the coal inlet pipe 1 to enter the inside of the rotating cylinder 6 to avoid feed blockage.
[0026] In this embodiment, when the coal blocks enter the coal inlet pipe 1 from the inclined chute 5, the wind shield 10 rotates and the coil spring 11 is compressed. When no coal blocks enter the inclined chute 5, the compressed coil spring 11 is released, and the wind shield 10 rotates and blocks the inclined chute 5 to prevent hot air from flowing out. The above specific embodiments are only several preferred embodiments of the utility model. Based on the technical solutions of the utility model and the relevant enlightenment of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A ventilation auxiliary device for a coal mill bin, comprising a coal inlet pipe (1), a hot air pipe (4), an inclined chute (5), a rotary cylinder (6) and a coal outlet pipe (7), characterized in that: A coal inlet pipe (1) and a coal outlet pipe (7) are rotatably mounted on both ends of the rotary cylinder (6), and an inclined chute (5) is fixedly connected to the upper surface of the coal inlet pipe (1). A hot air pipe (4) is fixedly connected to a position close to the upper surface of the outer surface of the coal inlet pipe (1) on a side facing away from the rotary cylinder (6). A plurality of stepped corrugated lining plate groups (12) are equidistantly fixedly mounted on the inner wall of the rotary cylinder (6) on a side close to the coal inlet pipe (1). A plurality of corrugated lining plate groups (13) and a corrugated graded lining plate group (14) are equidistantly fixedly mounted on the inner wall of the rotary cylinder (6) on a side close to the coal outlet pipe (7). The surfaces of the lining plates present a certain inclination angle, forming a plurality of stepped structures.
2. A ventilation auxiliary device for a coal mill bin according to claim 1, characterized in that: The corrugated lining plate group (13) and the corrugated grading lining plate group (14) are distributed at intervals inside the rotary cylinder (6).
3. The ventilation auxiliary device for a coal mill bin according to claim 1, characterized in that: A windshield plate (10) is rotatably mounted on the inner wall of the inclined slide pipe (5).
4. A ventilation auxiliary device for a coal mill bin according to claim 3, characterized in that: A coil spring (11) is fixedly connected to the outer surface of the wind deflector (10).
5. The ventilation auxiliary device for a coal mill bin according to claim 1, characterized in that: A rotating shaft (9) is rotatably mounted inside the coal inlet pipe (1), and spiral blades (8) are welded to the outer surface of the rotating shaft (9).
6. A ventilation auxiliary device for a coal mill bin according to claim 5, characterized in that: A reducer (2) is fixedly mounted on the outer surface of the coal feed pipe (1), and the end of the output shaft of the reducer (2) is fixedly connected to the end of the rotating shaft (9). A feeding motor (3) is fixedly mounted on the outer surface of the reducer (2), and the end of the output shaft of the feeding motor (3) is fixedly connected to the input end of the reducer (2).