CN115463736A - Wing-shaped air ring of coal mill - Google Patents
Wing-shaped air ring of coal mill Download PDFInfo
- Publication number
- CN115463736A CN115463736A CN202210623285.9A CN202210623285A CN115463736A CN 115463736 A CN115463736 A CN 115463736A CN 202210623285 A CN202210623285 A CN 202210623285A CN 115463736 A CN115463736 A CN 115463736A
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- ring
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- side wall
- wind ring
- coal mill
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- 239000003245 coal Substances 0.000 title claims abstract description 68
- 239000000843 powder Substances 0.000 claims abstract description 60
- 230000007704 transition Effects 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
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- 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
Abstract
The invention discloses a coal mill wing-shaped air ring, which belongs to the technical field of coal mills and is positioned in a shell of the coal mill, and the coal mill wing-shaped air ring comprises: the movable ring is a wing-shaped wind ring, the wing-shaped wind ring is provided with an inner wind ring and an outer wind ring, the inner wind ring is installed on a tray of the coal mill, the outer wind ring is sleeved on the circumferential outer side of the inner wind ring, a cavity which is contracted and expanded firstly in the direction from bottom to top is formed between the outer wind ring and the inner wind ring, and blades are distributed in the cavity; and a stationary ring connected with the housing; the profile design of the inner wind ring and the profile design of the outer wind ring are both assisted by the airfoil model, when primary wind passes through the cavity, low pressure is formed at the outer side wall of the upper part of the inner wind ring, the primary wind is enabled to flow towards the middle, so that the inertia zone of the middle flow field is reduced, two inclined inner walls on the wind powder guide ring are used for guiding the primary wind to guide the middle flow of the coal mill, the middle flow field stability is improved, and the abrasion of the hot wind passing through the airfoil wind ring to the shell of the coal mill is reduced.
Description
Technical Field
The invention belongs to the technical field of coal mills, and particularly relates to a wing-shaped air ring of a coal mill.
Background
The coal mill can be divided into three types of low-speed, medium-speed and high-speed coal mills according to the rotating speed of a coal grinding working part, wherein the medium-speed coal mill has the remarkable advantages of compact equipment, small occupied area, electricity consumption saving, low noise, lighter and sensitive operation control and the like, and is more used in a large-capacity coal-fired boiler. One type of medium speed coal mill currently in use is the medium speed roller mill manufactured by the Beijing Electrical Equipment Consortium (product ZGM as code).
The nozzle ring of the ZGM type medium speed coal mill in the prior art adopts a split structure, the static ring of the ZGM type medium speed coal mill adopts a segmented structure, the service life of the ZGM type medium speed coal mill is shortened due to the fact that the flow velocity of an internal flow field of the coal mill is too fast and the surface of a shell, the static ring and a movable ring is seriously washed, the static ring and the movable ring need to be frequently replaced, the economic benefit is reduced, and the movable ring and the static ring which are seriously blown can change the internal air pressure of the coal mill to cause safety accidents.
In view of the above problems, there is an urgent need for a coal mill air ring with resistance to blowing loss.
Disclosure of Invention
In order to at least solve the problem that the air ring of the coal mill is easy to blow and damage in the prior art, the invention provides the following technical scheme: a coal pulverizer airfoil wind ring is located the coal pulverizer casing, coal pulverizer airfoil wind ring includes:
the movable ring is a wing-shaped wind ring, the wing-shaped wind ring is provided with an inner wind ring and an outer wind ring, the inner wind ring is installed on a tray of the coal mill, the outer wind ring is sleeved on the circumferential outer side of the inner wind ring, a cavity which is contracted and expanded firstly in the direction from bottom to top is formed between the outer wind ring and the inner wind ring, and blades are distributed in the cavity; and
and the static ring is connected with the shell.
Preferably, the inner side wall of the upper part and the inner side wall of the middle part of the outer wind ring are both linear, and the inner side wall of the lower part is arc-shaped and is bent from inside to outside;
the outer side wall of the upper part of the inner wind ring is in an arc shape bent from outside to inside, the outer side wall of the middle part of the inner wind ring is in a straight line shape, and the outer side wall of the lower part of the inner wind ring is in an arc shape bent from inside to outside.
Preferably, the inner side wall of the outer wind ring and the outer side wall of the inner wind ring are both smooth surfaces;
the inner side wall of the upper part of the outer wind ring and the inner side wall of the middle part of the outer wind ring are both vertical straight lines, and the inner diameters of the inner side wall of the upper part of the outer wind ring and the inner side wall of the middle part of the outer wind ring are equal;
the outer side wall of the middle part of the inner wind ring is vertical and linear;
the middle part of the inner wind ring is opposite to the middle part of the outer wind ring;
the primary air flowing through the cavity flows in a vertical direction.
Preferably, a wind shielding ring is mounted at the top end of the outer wind ring.
Preferably, the stationary ring is a wind powder deflector ring, and is located above the outer wind ring so as to form a horizontal gap between the wind powder deflector ring and the outer wind ring, the inner side wall of the upper part of the wind powder deflector ring is obliquely arranged in the direction close to the axial lead of the wind powder deflector ring, and the inner side wall of the lower part of the wind powder deflector ring is obliquely arranged in the direction far away from the axial lead of the wind powder deflector ring.
Preferably, the included angle between the inner side wall of the lower part of the wind-powder guide ring and the horizontal plane is 70-80 degrees.
Preferably, the outer side wall of the upper portion of the outer wind ring is fixedly provided with an annular boss, a support is arranged in the casing, a transition flange is fixedly arranged on the upper portion of the support, the transition flange is located on the outer side of the annular boss so as to form a gap between the transition flange and the annular boss, and the wind powder guide ring is fixedly installed on the transition flange.
Preferably, the upper part of the outer side of the wind powder deflector ring is provided with an anti-wear plate, and the anti-wear plate is positioned between the casing and the wind powder deflector ring.
Preferably, the top end of the wind powder guide ring is vertically provided with a through hole, the lower part in the through hole is provided with a bolt for fixing the wind powder guide ring on the transition flange, and the wind powder guide ring above the through hole is provided with a sealing ring.
Preferably, round steel is arranged in the machine shell and located at the edge of the upper surface of the transition flange.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the profile design of the inner wind ring and the outer wind ring in the wing-shaped wind ring is realized by means of wing-shaped models, the whole body of the wing-shaped wind ring is similar to the upper surface and the lower surface of a wing, when primary wind passes through a plurality of primary wind inlet passages between the inner wind ring and the outer wind ring, the speed of the outer side wall of the upper part of the inner wind ring is higher than that of the inner side wall of the upper part of the outer wind ring, low pressure is formed at the outer side wall of the upper part of the inner wind ring, certain pressure difference is also generated, and the primary wind flows towards the middle part, so that the inertness area of a middle flow field is reduced, and the abrasion of a shell of a coal mill is reduced;
the inside wall on the upper portion of wind powder water conservancy diversion ring sets up towards the direction slope of the axial lead that is close to wind powder water conservancy diversion ring, the inside wall of lower part sets up towards the direction slope of the axial lead of keeping away from wind powder water conservancy diversion ring, in order to guide wind direction coal pulverizer middle part water conservancy diversion once, increase middle part flow field stability, reduce the hot-blast wearing and tearing to the coal pulverizer casing behind the wing section wind ring, when once wind direction external rotation sweeps, sweep the branch speed with its wind direction coal pulverizer casing side of reducing, also play the effect of water conservancy diversion downwards to the great buggy of granule on wind powder water conservancy diversion ring simultaneously, avoid a large amount of buggy to pile up on wind powder water conservancy diversion ring, avoid the conflagration, the emission of the coal pulverizer stone coal has been reduced simultaneously.
Drawings
FIG. 1 is a schematic structural view of an airfoil wind ring of a coal mill according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an airfoil wind ring of a coal mill according to an embodiment of the present invention;
FIG. 3 is a schematic view of a blade deployment structure of an airfoil wind ring of a coal mill according to an embodiment of the present invention;
in the figure: 1. a transition flange; 2. wind powder guide ring; 3. a seal ring; 4. a wind-shield ring; 5. an outer wind ring; 501. the upper part of the outer wind ring; 502. the middle part of the outer wind ring; 503. the lower part of the outer wind ring; 6. a blade; 7. a tray; 8. round steel; 9. a wear plate; 10. a support; 11. a housing; 12. an inner wind ring 1201, an upper part of the inner wind ring; 1202. the middle part of the inner wind ring; 1203. the lower part of the inner wind ring; 13. and an annular boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
Referring to fig. 1-3, the present invention provides a coal mill airfoil vane, comprising: a dynamic ring and a static ring. The rotating ring is wing section wind ring, and wing section wind ring has interior wind ring 12 and outer wind ring 5, and interior wind ring 12 is installed on the tray 7 of coal pulverizer, and tray 7 fixed connection is in the transmission dish and can rotate under the drive of transmission dish, and tray 7 drives interior wind ring 12 simultaneously and rotates. The outer wind ring 5 is sleeved on the circumferential outer side of the inner wind ring 12, and a cavity which is firstly contracted and then expanded in the direction from bottom to top (for example, in the direction from right to left in fig. 1 or the following direction from a primary air inlet to a primary air outlet) is formed between the outer wind ring 5 and the inner wind ring 12, that is, the cavity wall of the cavity is composed of the outer side wall of the inner wind ring 12 and the inner side wall of the outer wind ring 5, and blades 6 are distributed in the cavity and can be connected between the inner wind ring 12 and the outer wind ring 5, so that the outer wind ring 5 is sleeved on the circumferential outer side of the inner wind ring 12 through the blades 6, and a plurality of blades 6 are uniformly and obliquely distributed between the inner wind ring 12 and the outer wind ring 5 along the circumferential direction of the inner wind ring 12 or the outer wind ring 5, for example: the blades 6 form 40 degrees with the horizontal plane, the cavity is uniformly divided into a plurality of primary air inlet passages by the blades 6, the lower parts of the primary air inlet passages are provided with primary air inlets, the upper parts of the primary air inlet passages are provided with primary air outlets, when the inner air ring 12 rotates, the outer air ring 5 is driven by the blades 6 to rotate to form primary air, and the primary air flows from the primary air inlets to the primary air outlets from bottom to top in the primary air inlet passages. The stationary ring is connected to the casing 11.
The inner side wall of the upper part 501 and the inner side wall of the middle part 502 of the outer wind ring are both straight lines, and the lower part 503 is an arc line which is bent from inside to outside. The outer side wall of the upper part 1201 of the inner wind ring is in an arc shape which is bent from outside to inside, the outer side wall of the middle part 1202 is in a straight line shape, and the outer side wall of the lower part 1203 is in an arc shape which is bent from inside to outside, so that the flowing of primary wind is facilitated.
The design principle of the wing-shaped wind ring is explained as follows: the area surrounded by the inner side wall of the middle part 502 of the outer wind ring, the outer side wall of the middle part 1202 of the inner wind ring, the inner side wall of the lower part 503 of the outer wind ring and the outer side wall of the lower part 1203 of the inner wind ring forms a Venturi effect model, according to the Venturi effect and Bernoulli equation, C = P + (1/2) × ρ v ^2+ ρ gh, when a certain fluid passes through a contraction section, the flow velocity is increased, and when the flow velocity is increased, the pressure is reduced to form low pressure, so that an adsorption effect is generated, the fluid can be better promoted to pass through, and meanwhile, the area surrounded by the inner side wall of the upper part 501 of the outer wind ring, the inner side wall of the middle part 502 of the outer wind ring, the outer side wall of the middle part 1202 of the inner wind ring, the outer side wall of the upper part 1201 of the inner wind ring and the outer side wall of the lower part 1203 of the inner wind ring is assisted by a wing section model, the whole structure is similar to the upper surface and the lower surface of a wing, namely the outer side wall of the inner wind ring 12 is similar to the upper surface of an airfoil, the inner side wall of the outer wind ring 5 is similar to the lower surface of the airfoil, when a fluid passes through, the speed of the outer side wall of the upper part 1201 of the inner wind ring is higher than that of the inner side wall of the upper part 501 of the outer wind ring, low pressure is formed at the outer side wall of the upper part 1201 of the inner wind ring, a certain pressure difference is also generated, primary wind direction middle flowing is promoted, therefore, the inert region of a middle flow field is reduced, and the abrasion of the coal mill casing 11 is reduced.
The inner side wall of the upper part 501 and the inner side wall of the middle part 502 of the outer wind ring are both vertical straight lines, and the inner diameters of the inner side walls of the upper part 501 and the middle part 502 of the outer wind ring are equal; the outer side wall of the middle part 1202 of the inner wind ring is vertically straight, thus further facilitating the flow of the primary wind. Further, both the inner side wall of the outer wind ring 5 and the outer side wall of the inner wind ring 12 are smooth surfaces. Preferably, the middle part 1202 of the inner wind ring is arranged opposite to the middle part 502 of the outer wind ring, and it should be noted that the relative arrangement may be positive relative, that is, in fig. 1, the projection of the middle part 1202 of the inner wind ring on the outer wind ring 5 is completely located at the middle part 502 of the outer wind ring; the middle portions 1202 of the inner wind rings may be staggered, that is, the projection of the middle portions on the outer wind ring 5 is partially located in the middle portion 502 of the outer wind ring, and is partially located outside the middle portion 502 of the outer wind ring. Through the design of wing section wind ring for when the flow direction of the interior wind of cavity is vertical direction (left and right direction in fig. 1, upper and lower direction in fig. 2), can improve the stability of middle part flow field, also do benefit to the installation of wind ring simultaneously.
Preferably, the stationary ring is a wind powder deflector ring 2, and is located above the outer wind ring 5 to form a horizontal gap between the wind powder deflector ring 2 and the outer wind ring 5, the inner sidewall of the upper portion of the wind powder deflector ring 2 is obliquely arranged toward the direction close to the axial lead of the wind powder deflector ring 2, in fig. 1, the right end of the inner sidewall is close to the axial lead of the wind powder deflector ring 2 relative to the left end of the inner sidewall, the inner sidewall of the lower portion is obliquely arranged toward the direction away from the axial lead of the wind powder deflector ring 2, in fig. 1, the right end of the inner sidewall is away from the axial lead of the wind powder deflector ring 2 relative to the left end of the inner sidewall, so as to guide primary wind to the middle portion of the coal mill to increase the middle portion flow field stability, and reduce the abrasion of the coal mill casing by the hot wind passing through the wing-shaped wind ring. Preferably, the included angle between the inner side wall of the underground part and the horizontal plane is 70-80 degrees, for example: the effect is better at 70 °, 72 °,75 °, 77 °, 80 °,75 °. In data simulation, a part of primary air flows to the side of the coal mill shell 11 under the action of the rotating centrifugal force of the air ring, the maximum speed is mainly concentrated at the intersection of two inclined planes on the inner side wall of the air-powder guide ring 2, namely the intersection of the inclined inner side wall at the lower part and the inclined inner side wall at the upper part of the air-powder guide ring 2, in order to reduce the abrasion of the primary air to the coal mill shell 11, the inclined plane which flows to the side of the coal mill shell is set, when the primary air is blown outwards in a rotating mode, the blowing speed of the primary air to the side of the coal mill shell is reduced, meanwhile, the downward flow guiding effect is also achieved on coal powder with larger particles on the air-powder guide ring 2, a large amount of coal powder is prevented from being accumulated on the air-powder guide ring 2, fire is avoided, and meanwhile, and the discharge amount of pebble coal of the coal mill is reduced.
Preferably, the inner side wall of the upper part of the wind powder guide ring 2 is connected with the inner side wall of the lower part of the wind powder guide ring 2, and the inner side walls are integrally formed.
Preferably, the horizontal projection of the bottom end point of the inclined inner side wall of the lower part of the wind powder deflector ring 2 is located on the top end of the outer wind ring 5, for example, the horizontal projection of the top end point of the inclined inner side wall of the lower part of the wind powder deflector ring 2 is located on the wind blocking ring 4.
Preferably, the outer side wall of the upper part 501 of the outer wind ring is provided with an annular boss 13 which protrudes in the radial direction of the outer wind ring 5. The annular boss 13 may be welded to the outer wind ring 5, or may be integrally formed with the outer wind ring 5, which is not limited in this embodiment. Annular boss 13 sets up in the outside of outer wind ring 5 to can reduce the blow loss of wind to wind powder water conservancy diversion ring 2, also conveniently install wind blocking ring 4 on the top of outer wind ring 5 simultaneously, wind blocking ring 4 that is used for controlling the fluid velocity of flow or the flow direction through blade 6 is installed through the bolt at the top of outer wind ring 5, and wind blocking ring 4 can radially shelter from the wind of certain limit, and it has multiple size, for example: the wind-blocking rings with the diameters of 10mm, 15mm and 20mm can be blocked respectively along the radial direction, and the size can be selected to be changed and adjusted according to the coal quality and the operation condition of the coal mill, so that the condition that the output of the coal mill is reduced due to large pressure difference caused by different coal qualities is avoided.
Preferably, a support 10 is arranged in the casing 11, a transition flange 1 is welded on the upper portion of the support 10, the transition flange 1 is located outside the annular boss 12 to form an interval between the transition flange 1 and the annular boss 12, and the wind powder deflector ring 2 is fixedly mounted on the transition flange 1.
Preferably, the upper portion of the outer side of the wind powder guide ring 2 is provided with an anti-wear plate 9, the anti-wear plate 9 is located between the casing 11 and the wind powder guide ring 2, the anti-wear plate 9 is made of UP plate wear-resistant material, abrasion to the outer wall of the wind powder guide ring 2 during vibration of the coal mill can be reduced, and the service life of the wind powder guide ring 2 is prolonged.
Preferably, the top end of the wind powder guide ring 2 is vertically provided with a through hole, the lower part in the through hole is provided with a bolt for fixing the wind powder guide ring 2 on the transition flange 1, the wind powder guide ring 2 is convenient to detach and replace in a bolt connection mode, the wind powder guide ring 2 above the through hole is provided with a sealing ring 3, and the sealing ring 3 can prevent pulverized coal from entering a lower cavity.
Preferably, be provided with round steel 8 in the casing 11, round steel 8 is located transition flange 1's upper surface edge, and round steel 8 mainly plays sealed effect, has avoided a wind to get into through transition flange 1 of lower part.
It will be appreciated by those skilled in the art that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. The utility model provides a coal pulverizer wing section wind ring, is located the coal pulverizer casing, its characterized in that, coal pulverizer wing section wind ring includes:
the movable ring is a wing-shaped wind ring, the wing-shaped wind ring is provided with an inner wind ring and an outer wind ring, the inner wind ring is installed on a tray of the coal mill, the outer wind ring is sleeved on the circumferential outer side of the inner wind ring, a cavity which is contracted and expanded firstly in the direction from bottom to top is formed between the outer wind ring and the inner wind ring, and blades are distributed in the cavity; and
and the static ring is connected with the shell.
2. The wing-shaped wind ring of the coal mill as claimed in claim 1, wherein the inner side wall of the upper part and the inner side wall of the middle part of the outer wind ring are both straight, and the inner side wall of the lower part is arc-shaped and is bent from inside to outside;
the outer side wall of the upper part of the inner wind ring is in an arc shape bent from outside to inside, the outer side wall of the middle part of the inner wind ring is in a straight line shape, and the outer side wall of the lower part of the inner wind ring is in an arc shape bent from inside to outside.
3. The coal mill airfoil wind ring of claim 2, wherein the inner side wall of the outer wind ring and the outer side wall of the inner wind ring are both smooth surfaces;
the inner side wall of the upper part of the outer wind ring and the inner side wall of the middle part of the outer wind ring are both vertical straight lines, and the inner diameters of the inner side wall of the upper part of the outer wind ring and the inner side wall of the middle part of the outer wind ring are equal;
the outer side wall of the middle part of the inner wind ring is vertical and linear;
the middle part of the inner wind ring is opposite to the middle part of the outer wind ring;
the primary air flowing through the cavity flows in the vertical direction.
4. The coal mill airfoil vane ring of claim 1, wherein a wind-blocking ring is mounted to a top end of the outer vane.
5. The coal mill airfoil wind ring as claimed in claim 1, wherein the stationary ring is a wind powder deflector ring, and is located above the outer wind ring to form a horizontal gap between the wind powder deflector ring and the outer wind ring, the inner sidewall of the upper portion of the wind powder deflector ring is disposed to be inclined toward a direction close to the axial lead of the wind powder deflector ring, and the inner sidewall of the lower portion of the wind powder deflector ring is disposed to be inclined toward a direction away from the axial lead of the wind powder deflector ring.
6. The airfoil wind ring of the coal mill as set forth in claim 5, wherein the included angle between the inner side wall of the lower portion of the wind powder deflector ring and the horizontal plane is 70 ° to 80 °.
7. The coal mill airfoil wind ring as claimed in claim 5, wherein an annular boss is fixedly arranged on an outer side wall of an upper portion of the outer wind ring, a support is arranged in the casing, a transition flange is fixedly arranged on an upper portion of the support, the transition flange is located on an outer side of the annular boss to form a space between the transition flange and the annular boss, and the wind powder deflector ring is fixedly arranged on the transition flange.
8. The coal mill airfoil wind ring as set forth in claim 5, wherein a wear plate is disposed at an upper outer portion of said wind powder deflector ring, said wear plate being disposed between said casing and said wind powder deflector ring.
9. The wing-shaped wind ring of the coal mill as claimed in claim 7, wherein a through hole is vertically formed at the top end of the wind powder deflector ring, a bolt for fixing the wind powder deflector ring on the transition flange is arranged at the inner lower part of the through hole, and a sealing ring is arranged on the wind powder deflector ring above the through hole.
10. The coal mill airfoil vane of claim 7, wherein round steel is disposed within the casing at an upper surface edge of the transition flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210623285.9A CN115463736A (en) | 2022-06-01 | 2022-06-01 | Wing-shaped air ring of coal mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210623285.9A CN115463736A (en) | 2022-06-01 | 2022-06-01 | Wing-shaped air ring of coal mill |
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| CN202210623285.9A Pending CN115463736A (en) | 2022-06-01 | 2022-06-01 | Wing-shaped air ring of coal mill |
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Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB810915A (en) * | 1956-07-24 | 1959-03-25 | Ernst Gunter Loesche | Improvements in and relating to grinding mills |
| US4687145A (en) * | 1985-12-12 | 1987-08-18 | The Babcock & Wilcox Company | Roll-and-race pulverizer with rotating throat |
| US20060022075A1 (en) * | 2004-07-27 | 2006-02-02 | Wark Rickey E | Deflector for coal pulverizer/classifier |
| KR200447331Y1 (en) * | 2008-09-09 | 2010-01-15 | 한국동서발전(주) | Device for Reducing Coal Spillage of Bowl Mill |
| CN101947484A (en) * | 2010-09-10 | 2011-01-19 | 浙江省电力试验研究院 | Method for reducing discharge capacity of cobble coal of intermediate-speed coal mill |
| CN202052610U (en) * | 2011-05-03 | 2011-11-30 | 华东电力试验研究院有限公司 | Intermediate-speed coal grinding machine with primary separation adjustment device |
| CN102753271A (en) * | 2009-11-19 | 2012-10-24 | 里基·E·沃克 | Double course vane wheel |
| CN103406191A (en) * | 2013-07-19 | 2013-11-27 | 国家电网公司 | HP type medium-speed coal mill, and method for reducing pebble coal discharge amount of HP type medium-speed coal mill |
| CN104776224A (en) * | 2015-02-02 | 2015-07-15 | 浙江大学 | Medium-speed coal mill air ring dynamic and static clearance sealing device |
| JP2015167930A (en) * | 2014-03-10 | 2015-09-28 | 宇部興産機械株式会社 | Vertical crusher |
| US20150321197A1 (en) * | 2012-03-26 | 2015-11-12 | Babcock-Hitachi Kabushiki Kaisha | Vertical Pulverizing Apparatus |
| CN205731448U (en) * | 2016-07-13 | 2016-11-30 | 中国神华能源股份有限公司 | Raymond bowl mill |
| CN106378268A (en) * | 2016-11-17 | 2017-02-08 | 北京蓝爱迪电力技术有限公司 | Adjustable rotary spraying nozzle structure for high-efficiency wear-resistant low-resistant medium-speed vertical coal mill |
| CN206152954U (en) * | 2016-06-30 | 2017-05-10 | 中国电力工程顾问集团中南电力设计院有限公司 | Medium speed pulverizer rotating nozzle |
| CN206253243U (en) * | 2016-11-17 | 2017-06-16 | 北京蓝爱迪电力技术有限公司 | A kind of high-efficiency abrasion-proof lower resistance medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements |
| CN108940558A (en) * | 2018-01-30 | 2018-12-07 | 上海意丰机电科技开发有限公司 | A kind of dynamic and static vane |
| WO2020158270A1 (en) * | 2019-01-31 | 2020-08-06 | 三菱日立パワーシステムズ株式会社 | Crusher, boiler system, and method for operating crusher |
| CN214554040U (en) * | 2020-12-29 | 2021-11-02 | 华能国际电力股份有限公司营口电厂 | Coal mill impeller wind ring clearance adjustment structure |
| CN218654880U (en) * | 2022-06-01 | 2023-03-21 | 北京电力设备总厂有限公司 | Coal mill wind ring device |
| CN218690370U (en) * | 2022-06-01 | 2023-03-24 | 北京电力设备总厂有限公司 | Nozzle device is optimized to coal pulverizer runner |
-
2022
- 2022-06-01 CN CN202210623285.9A patent/CN115463736A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB810915A (en) * | 1956-07-24 | 1959-03-25 | Ernst Gunter Loesche | Improvements in and relating to grinding mills |
| US4687145A (en) * | 1985-12-12 | 1987-08-18 | The Babcock & Wilcox Company | Roll-and-race pulverizer with rotating throat |
| US20060022075A1 (en) * | 2004-07-27 | 2006-02-02 | Wark Rickey E | Deflector for coal pulverizer/classifier |
| KR200447331Y1 (en) * | 2008-09-09 | 2010-01-15 | 한국동서발전(주) | Device for Reducing Coal Spillage of Bowl Mill |
| CN102753271A (en) * | 2009-11-19 | 2012-10-24 | 里基·E·沃克 | Double course vane wheel |
| CN101947484A (en) * | 2010-09-10 | 2011-01-19 | 浙江省电力试验研究院 | Method for reducing discharge capacity of cobble coal of intermediate-speed coal mill |
| CN202052610U (en) * | 2011-05-03 | 2011-11-30 | 华东电力试验研究院有限公司 | Intermediate-speed coal grinding machine with primary separation adjustment device |
| US20150321197A1 (en) * | 2012-03-26 | 2015-11-12 | Babcock-Hitachi Kabushiki Kaisha | Vertical Pulverizing Apparatus |
| CN103406191A (en) * | 2013-07-19 | 2013-11-27 | 国家电网公司 | HP type medium-speed coal mill, and method for reducing pebble coal discharge amount of HP type medium-speed coal mill |
| JP2015167930A (en) * | 2014-03-10 | 2015-09-28 | 宇部興産機械株式会社 | Vertical crusher |
| CN104776224A (en) * | 2015-02-02 | 2015-07-15 | 浙江大学 | Medium-speed coal mill air ring dynamic and static clearance sealing device |
| CN206152954U (en) * | 2016-06-30 | 2017-05-10 | 中国电力工程顾问集团中南电力设计院有限公司 | Medium speed pulverizer rotating nozzle |
| CN205731448U (en) * | 2016-07-13 | 2016-11-30 | 中国神华能源股份有限公司 | Raymond bowl mill |
| CN106378268A (en) * | 2016-11-17 | 2017-02-08 | 北京蓝爱迪电力技术有限公司 | Adjustable rotary spraying nozzle structure for high-efficiency wear-resistant low-resistant medium-speed vertical coal mill |
| CN206253243U (en) * | 2016-11-17 | 2017-06-16 | 北京蓝爱迪电力技术有限公司 | A kind of high-efficiency abrasion-proof lower resistance medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements |
| CN108940558A (en) * | 2018-01-30 | 2018-12-07 | 上海意丰机电科技开发有限公司 | A kind of dynamic and static vane |
| WO2020158270A1 (en) * | 2019-01-31 | 2020-08-06 | 三菱日立パワーシステムズ株式会社 | Crusher, boiler system, and method for operating crusher |
| CN214554040U (en) * | 2020-12-29 | 2021-11-02 | 华能国际电力股份有限公司营口电厂 | Coal mill impeller wind ring clearance adjustment structure |
| CN218654880U (en) * | 2022-06-01 | 2023-03-21 | 北京电力设备总厂有限公司 | Coal mill wind ring device |
| CN218690370U (en) * | 2022-06-01 | 2023-03-24 | 北京电力设备总厂有限公司 | Nozzle device is optimized to coal pulverizer runner |
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