CN114453072A - Coal grinding turbine device with wear-resisting plate - Google Patents
Coal grinding turbine device with wear-resisting plate Download PDFInfo
- Publication number
- CN114453072A CN114453072A CN202210105164.5A CN202210105164A CN114453072A CN 114453072 A CN114453072 A CN 114453072A CN 202210105164 A CN202210105164 A CN 202210105164A CN 114453072 A CN114453072 A CN 114453072A
- Authority
- CN
- China
- Prior art keywords
- polishing table
- rotatable polishing
- ball mill
- air
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 27
- 238000000227 grinding Methods 0.000 title claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 2
- 239000011888 foil Substances 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/28—Passing gas through crushing or disintegrating zone gas moving means being integral with, or attached to, crushing or disintegrating element
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
A coal grinding impeller device with wear plates is included in a pulverizer (10) with a plurality of blades (36) supported on a rotatable grinding table (14) of the mill for co-rotation. A diverging orifice (38) is mounted in the mill above the table to direct the gas flow to the center of the mill. The vanes act to reverse the direction of the air flow around the table, whether rotating or counter-rotating, which causes larger powder particles to be separated onto the table by the orifices.
Description
Technical Field
The invention discloses a coal grinding impeller device with an abrasion-resistant plate, particularly relates to a coal powder material grinding device, and particularly relates to a blade coal grinder suitable for being implemented in a ball-milling pulverizer.
Background
Coal is a material that requires grinding to make it suitable for use in the field of power generation. Fossil fuel fired power generation systems have also represented a long-term use of coal as a fuel source, and it is therefore desirable to pulverize the coal for this purpose. Coal is one of the most abundant fuel sources in fossil fuel energy. Energy access in all countries in the beginning of the 19 th century was obtained by combustion using coal. Then, to some extent, the power generation amount of coal decreases. This decline is primarily due to the increased use of oil and natural gas as fuel sources. However, in the last decade, coal has been the focus of attention as a fuel source to meet national energy needs as oil export has been banned, oil prices have risen rapidly, oil supplies have been limited, and world oil reserves have depleted.
Coal mills have many advantages as a means for grinding coal resources, but there are also coal mills specifically designed for coal-fired power generation systems. The method has the characteristics of reliability, low power consumption, lowest maintenance cost, wide capacity and the like. Furthermore, such a device should have the following advantages: low noise in operation, integrated lubrication system, ease of regulation and control of coal flow and particle size, and the ability to handle the hot air required for wet coal.
Disclosure of Invention
It is an object of the present invention to provide an improved primary classifier suitable for use in a ball mill apparatus.
It is another object of the present invention to provide a primary classifier for a ball mill that includes a blade suitably mounted on the circumference of a rotatable polishing surface of the ball mill and for directing a gas stream through the interior of the ball mill.
Another object of the present invention is a ball mill including a diffusion orifice assembly mounted in spaced relation on a rotatable grinding surface of the ball mill and operable to further direct a gas stream through the interior of the ball mill.
It is another object of the present invention to provide a vane arrangement which cooperates with one another such that larger particles of comminuted material entrained in the air stream flowing through a ball mill crusher are separated from the air stream and returned to the rotatable polishing surface for additional grinding.
The present invention provides a one-stage classifier which is particularly suitable for use in the form of a ball mill for grinding coal-like materials. The primary classifier includes a blade supported on the circumference of a rotatable polishing table of the ball mill. The working mode of the blade is as follows: the air flowing in the rotatable polishing table and its surrounding relationship changes direction and flows counterclockwise in the direction of rotation of the polishing table, thereby causing the pulverized material entrained in the air to be transported in a direction opposite to the direction of rotation of the polishing table. This in turn causes the larger particles in the abrasive material to lose momentum, causing the larger particles to separate from the gas stream and return to the surface of the polishing table. The primary classifier also includes a diffusion orifice assembly mounted in the ball mill in spaced relation to the surface of the rotatable polishing table. The diffusion orifice assembly is operated to direct the abrasive-laden gas stream toward the center of the ball mill. This change in the direction of the gas flow causes the larger, heavier particles in the abrasive material to lose momentum, thereby separating the particles from the gas flow and returning them to the polishing station for additive grinding.
Drawings
Fig. 1 is a partial side cross-sectional view of a ball mill of a one-stage classifier made in accordance with the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention is provided, fig. 1 is a partial side sectional view of a ball mill of a one-stage classifier, showing a ball mill 10 including a nearly closed separation body 12. The polishing table 14 is disposed on a shaft 16, which shaft 16 in turn is operatively connected to a suitable drive mechanism (not shown) so as to be rotatable by the drive mechanism. In the method shown in fig. 1, the polishing table 14 is designed to be driven in a clockwise direction together with the above-described elements mounted in the separate body 12.
According to a conventional embodiment, a plurality of grating rollers 18, suitably three separate bodies 12, are equally spaced from each other around the circumference of the separate bodies 12. It is supported appropriately inside. For simplicity of the drawing, only one polishing roller 18 is shown in fig. 1. As best understood in fig. 1 with respect to the polishing rollers 18, each polishing roller is suitably supported on a shaft (not shown), with the polishing rollers 18 working with the shaft being urged against the surface of the polishing table 14. Typically, the biasing device (not shown) is provided with some form of conditioning device located between the surface of the polishing roll 18 and the polishing table 14, wherein the material (e.g., coal) is ground by operation of the conditioning device.
According to the embodiment of the ball mill 10 shown in fig. 1, the coal feed conduit 20 extends outwardly from the separation body 12 and suitably has one end terminating in a funnel-shaped member (not shown). A suitably sized tube 22. The funnel member (not shown) is suitably shaped to facilitate collection of the coal particles entering the ball mill 10 for introduction into the tube 22. The other end 24 of the tube 22 of the coal supply apparatus 20 is operated to efficiently discharge the coal on the surface of the polishing table 14. To this end, the tube end 24 is ground by appropriately supporting the tube end 24 in the separation body 12 using any suitable type of conventional supporting means (not shown) shown in fig. 1.
Claims (8)
1. A coal grinding turbine apparatus with a wear plate is provided, which comprises a ball mill 10 having a rotatable polishing table 14 through which material is ground, a primary classifier 30 mounted on the circumference of the rotatable polishing table 14 so as to rotate together with a blade device; as it changes direction of the air flowing in circumferential relation to the rotatable polishing table 14 and flows counterclockwise in the direction of rotation of the rotatable polishing table 14, thereby causing the larger particulate powder material entrained in the air foils to lose momentum and recovering the rotatable polishing table 14 therefrom separate from the air for additive grinding and spaced from the rotatable polishing table 14 in the ball mill; in the mounted state, the air flowing through the inside of the ball mill 10 is guided to the center of the ball mill 10, and thus, the direction of the air is changed; the larger particles of powder material entrained in the air by the air have a converging/diverging orifice arrangement 38 which is operable to lose momentum and separate from the air for recycling to the rotatable polishing table 14 for further grinding.
2. The ball mill according to claim 1, characterized in that: the blades of the main classifier 30 therein comprise a plurality of impeller segment assemblies mounted in spaced relation about the circumference of a rotatable polishing table.
3. A coal grinding impeller unit with a wear plate as claimed in claim 1, wherein: the impeller segment assemblies (40) wherein each impeller segment assembly (40) includes a blade projecting outwardly from the rotatable polishing table (14) at a 45 ° angle to rotation of the rotatable polishing table (14).
4. A coal grinding impeller unit with wear plate in accordance with claim 1 wherein the diffuser orifice plate assembly (38) of the primary classifier (30) is characterized by a plurality of intermediate liner support plates (58) mounted in spaced relation within the mill grinding machine.
5. A coal grinding impeller unit with a wear plate as claimed in claim 1, wherein: the converging/diverging orifice fitting 38 of the primary classifier 30 also includes a plurality of intermediate backing plates 62 mounted in overlapping relation on a plurality of intermediate backing plate support plates 58.
6. The primary classifier of claim 5, wherein: wherein the plurality of intermediate backing plates (62) are mounted on the plurality of intermediate backing plate support plates (58) by use of weld plugs (70); the diffusion hole arrangement (38) of the primary classifier (30) further includes a plurality of deflection liner support plates (60).
7. The primary classifier of claim 5, wherein: wherein the plurality of deflector liner plates (66) are mounted on a plurality of deflector liner support plates (60).
8. The plurality of deflection liner support plates according to claim 5, wherein said plurality of deflection liners 64 and said plurality of deflection liners 66 are mounted using weld plugs 72, 74, 76 and 78, respectively, for a primary classifier of a ball mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210105164.5A CN114453072A (en) | 2022-01-28 | 2022-01-28 | Coal grinding turbine device with wear-resisting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210105164.5A CN114453072A (en) | 2022-01-28 | 2022-01-28 | Coal grinding turbine device with wear-resisting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114453072A true CN114453072A (en) | 2022-05-10 |
Family
ID=81411315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210105164.5A Pending CN114453072A (en) | 2022-01-28 | 2022-01-28 | Coal grinding turbine device with wear-resisting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114453072A (en) |
-
2022
- 2022-01-28 CN CN202210105164.5A patent/CN114453072A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220510 |