CN217663680U - Coal mill static ring structure with wear-resistant ceramic coating - Google Patents
Coal mill static ring structure with wear-resistant ceramic coating Download PDFInfo
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- CN217663680U CN217663680U CN202220927316.5U CN202220927316U CN217663680U CN 217663680 U CN217663680 U CN 217663680U CN 202220927316 U CN202220927316 U CN 202220927316U CN 217663680 U CN217663680 U CN 217663680U
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Abstract
The utility model relates to a take wear-resisting ceramic coating's quiet ring structure of coal pulverizer, it includes: the movable ring rotates along with the grinding disc; the static ring is arranged on the cylinder wall of the coal mill; a dynamic and static gap is arranged between the dynamic ring and the static ring; and a wear-resistant protective layer is arranged on the surface of the static ring. The wear-resistant protective layer is composed of wear-resistant ceramic paint and a tortoise shell net. The tortoise shell net and the static ring are firmly welded by spot welding; wear-resistant ceramic paint is coated on the tortoise shell net; after drying, the wear resistance of the static ring is greatly improved. The utility model effectively solves the abrasion problem of the static ring of the coal mill, can prolong the service life of the equipment and can improve the powder-making efficiency of the coal mill; and the safety and the reliability of the coal mill system can be further ensured.
Description
Technical Field
The utility model relates to the field of machinary, especially indicate a take wear-resisting ceramic coating's quiet ring structure of coal pulverizer.
Background
The medium-speed coal mill is widely applied to a coal-fired power plant boiler pulverizing system and undertakes the work of grinding, drying, screening and conveying coal powder. The dynamic and static rings are used as key devices for organizing the internal flow field of the coal mill and are directly related to the operating efficiency of the coal mill. In the operation process of the coal mill, the clearance between the movable ring and the static ring is often seriously abraded due to wind powder scouring. Because static ring material wearability is poor, usually dynamic and static clearance wearing and tearing appear in one side of static ring, will cause the air leakage loss of primary air serious after the wearing and tearing, and lead to the powder efficiency of sending of primary air to seriously reduce, and coal pulverizer powder efficiency seriously reduces, and the stone coal volume increases, and the powder process power consumption risees.
The moving ring and the static ring of the coal mill play a vital role in organizing the flow field inside the coal mill. Usually, a moving ring (also called wind ring or impeller) is arranged outside a grinding disc of the coal mill, and a static ring is arranged on the wall of the grinding disc of the coal mill.
As shown in the attached figure 1, a static ring 2 'is arranged on the wall 1' of the coal mill cylinder; a dynamic and static gap 3' is formed between the static ring 2' and the dynamic ring 4 '. The primary air enters the coal mill through the moving ring air passage to form a reasonable air-powder flow field. And the position of the dynamic and static clearance is prevented from passing through once air, thereby causing air leakage loss. Therefore, the sealing effect of the clearance between the moving ring and the static ring of the coal mill is ensured, and the efficiency of the coal pulverizing system is particularly important.
However, at present, the positions of the dynamic and static rings are seriously abraded, the wind powder repeatedly scours dynamic and static gaps, foreign matters impact the dynamic and static ring structures, the materials of the dynamic and static rings are poor in abrasion resistance, so that the wind leakage at the gaps of the dynamic and static rings is serious, the primary wind speed is reduced, the lifting capacity of the primary wind on pulverized coal is reduced, the pulverized coal circulation rate in the coal mill is increased, the quantity of pebble coal is increased, and the like.
Disclosure of Invention
The utility model aims to overcome prior art and not enough provide a take quiet ring structure of wear-resisting ceramic coating's coal pulverizer, it adopts a mode of reinforceing the quiet ring department wearability of coal pulverizer, under the condition that does not influence other structures normal operating work of coal pulverizer, can effectively solve the quiet ring department wearing and tearing problem of coal pulverizer, extension equipment life improves coal pulverizer powder process efficiency.
The technical scheme of the utility model is that:
a coal mill static ring structure with a wear-resistant ceramic coating comprises: the movable ring rotates along with the grinding disc; the static ring body is arranged on the cylinder wall of the coal mill; a dynamic and static gap is arranged between the dynamic ring and the static ring; the wear-resistant paint protective layer is arranged on the surface of the static ring. Wherein, the wear-resistant coating protective layer is composed of wear-resistant ceramic coating and a tortoise shell net. The tortoise shell net and the static ring body are firmly welded in a spot mode; and wear-resistant ceramic paint is coated on the tortoise shell net, and the tortoise shell net has wear-resistant performance after being dried.
The wear-resistant ceramic coating is a composite material, has the advantages of tackiness and wear resistance, and has the hardness of a ceramic plate after being dried, wherein the Rockwell hardness is HRC55-70.
The tortoise shell net is made of common low-carbon steel, can be detached and welded, and is convenient to cover the surface of the stationary ring, and a single unit is in a regular hexagon shape. The thickness of the tortoise shell net is 8-15 mm.
The utility model has the advantages that: the utility model can greatly improve the wear resistance of the static ring of the coal mill, reduce the air leakage at the dynamic and static clearance, prolong the service life of the static ring of the coal mill, reduce the energy consumption of the equipment and reduce the maintenance cost; the safety and the reliability of the coal mill system can be further ensured.
Drawings
FIG. 1 is a schematic view of the structure of the moving ring and the stationary ring of the coal mill in the prior art.
Fig. 2 is a schematic structural diagram of a moving ring and a stationary ring of the coal mill according to embodiment 1 of the present invention.
Fig. 3 is a schematic view of a tortoise shell net structure in embodiment 1 of the present invention.
The reference numbers illustrate:
a coal mill cylinder wall 1, 1'; a stationary ring 2, 2'; dynamic and static gaps 3 and 3'; a movable ring 4, 4'; 5, wear-resistant ceramic paint; a tortoise shell net 6; a wear-resistant protective layer 7.
Detailed Description
The invention is further described with reference to the drawings and examples.
As shown in fig. 2 and 3, the static ring structure of coal mill with wear-resistant ceramic coating of the present invention comprises: the static ring 2 is arranged on the cylinder wall 1 of the coal mill; and a wear-resistant paint protective layer 7 is arranged on the surface of the static ring 2; a dynamic and static gap 3 is arranged between the static ring 2 and the dynamic ring 4; the moving ring 4 rotates along with the grinding disc.
The wear-resistant protective layer 7 is composed of a wear-resistant ceramic coating 5 and a tortoise shell net 6. The tortoise shell net 6 is firmly welded with the static ring 2; the wear-resistant ceramic coating 5 is coated on the tortoise shell net 6, and the wear resistance of the stationary ring can be greatly improved after drying.
The wear-resistant ceramic coating 5 is a composite material, has the advantages of tackiness and wear resistance, and has the hardness of a ceramic plate after being dried, wherein the Rockwell hardness is HRC55-70.
The tortoise shell net 6 is made of common low-carbon steel, can be detached and welded, and is convenient to cover the surface of the stationary ring, and a single unit is in a regular hexagon shape.
The thickness of the tortoise shell net 6 is 8-15 mm.
Claims (5)
1. The utility model provides a take wear-resisting ceramic coating's quiet ring structure of coal pulverizer which characterized in that: it includes: the movable ring rotates along with the grinding disc; the static ring is arranged on the cylinder wall of the coal mill; a dynamic and static gap is arranged between the dynamic ring and the static ring; a wear-resistant protective layer is arranged on the surface of the static ring; the wear-resistant protective layer consists of wear-resistant ceramic paint and a tortoise shell net; the tortoise shell net and the static ring are firmly welded; and wear-resistant ceramic paint is coated on the tortoise shell net.
2. The coal mill static ring structure with the wear-resistant ceramic coating according to claim 1, characterized in that: the wear-resistant ceramic coating is a composite material, has the advantages of tackiness and wear resistance, and has the hardness of a ceramic plate after being dried, wherein the Rockwell hardness is HRC55-70.
3. The coal mill static ring structure with the wear-resistant ceramic coating according to claim 1, characterized in that: the tortoise shell net is made of ordinary low-carbon steel through processing.
4. The coal mill static ring structure with the wear-resistant ceramic coating according to claim 1, characterized in that: the single unit of the tortoise shell net is in a regular hexagon shape; and each unit can be detached and welded.
5. The coal mill static ring structure with the wear-resistant ceramic coating of claim 1, wherein: the thickness of the tortoise shell net is 8-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220927316.5U CN217663680U (en) | 2022-04-21 | 2022-04-21 | Coal mill static ring structure with wear-resistant ceramic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220927316.5U CN217663680U (en) | 2022-04-21 | 2022-04-21 | Coal mill static ring structure with wear-resistant ceramic coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217663680U true CN217663680U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220927316.5U Active CN217663680U (en) | 2022-04-21 | 2022-04-21 | Coal mill static ring structure with wear-resistant ceramic coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217663680U (en) |
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2022
- 2022-04-21 CN CN202220927316.5U patent/CN217663680U/en active Active
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