CN117563754A - Coal mill wind ring device suitable for discharging sundries such as mud, sand and the like in applicable coal - Google Patents
Coal mill wind ring device suitable for discharging sundries such as mud, sand and the like in applicable coal Download PDFInfo
- Publication number
- CN117563754A CN117563754A CN202311862300.6A CN202311862300A CN117563754A CN 117563754 A CN117563754 A CN 117563754A CN 202311862300 A CN202311862300 A CN 202311862300A CN 117563754 A CN117563754 A CN 117563754A
- Authority
- CN
- China
- Prior art keywords
- ring
- coal
- sand
- mud
- self
- 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 66
- 239000004576 sand Substances 0.000 title claims abstract description 30
- 238000007599 discharging Methods 0.000 title claims abstract description 10
- 230000003068 static effect Effects 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 abstract description 36
- 239000013049 sediment Substances 0.000 abstract description 9
- 239000000428 dust Substances 0.000 description 10
- 239000000725 suspension Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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
- 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
-
- 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
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
Abstract
The invention discloses a coal mill wind ring device suitable for discharging sundries such as mud, sand and the like in applicable coal, which comprises a coal mill barrel, wherein a static ring is fixedly arranged in the coal mill barrel, a grinding cylinder is arranged in the static ring, a movable ring is arranged on the outer side of the grinding cylinder, a wind shielding ring is arranged on the outer side of the movable ring, a self-adjusting axial sealing baffle is arranged at the bottom end between the wind shielding ring and the static ring, a sediment discharge channel is arranged in the middle part between the wind shielding ring and the static ring, the two self-adjusting axial sealing baffles comprise a plurality of blades and limiting parts, the middle part of each limiting part is fixedly connected with one end of each blade, and each limiting part comprises two limiting shaft seats and an adjusting shaft.
Description
Technical Field
The invention relates to the technical field of coal mills, in particular to a wind ring device of a coal mill, which is suitable for discharging sundries such as mud, sand and the like in applicable coal.
Background
The working principle of the medium speed coal mill is that hot air with opposite flow directions at the throat of the air ring collides with falling pebble coal fiercely, a large amount of coal with smaller density is supported or blown up, fine coal powder is separated and blown up, and the fine coal powder is further separated by a separator and then enters a coal powder pipeline.
When the air ring of the coal mill works normally, the impurities such as stone coal which is not milled are thrown to the throat of the air ring, and then the stone coal falls to the stone coal box through the air ring when the hot air from bottom to top is insufficient to prevent the stone coal from falling.
However, conventional coal mills suffer from the following disadvantages:
at present, as the coal quality of each power plant is greatly changed, the mud and sand content of the coal is increased, part of silt can be blown up by hot air from bottom to top, and the suspended sand layer influences the coal dust separation efficiency, so that the output of a coal mill is insufficient; in order to solve the sand suspension problem, the pressure difference must be changed, and the sand suspension problem needs to be thrown and ground for a plurality of times every day, otherwise, the sand suspension problem can cause the phenomenon of blocking and grinding, and the safe and stable operation of the boiler is directly influenced.
Disclosure of Invention
The invention aims to provide a wind ring device of a coal mill, which is suitable for discharging sundries such as mud, sand and the like in applicable coal, so as to solve the problem that the coal mill output is insufficient in the prior art because the coal quality of each power plant is greatly changed, the mud and sand content of the coal quality is increased, part of mud is blown up by hot air from bottom to top, and the separation efficiency of coal dust is influenced by a suspended sand layer; in order to solve the sand suspension problem, the pressure difference must be changed, and the sand suspension problem needs to be thrown and ground for a plurality of times every day, otherwise, the sand suspension problem can cause the phenomenon of blocking and grinding, and the problem of safe and stable operation of the boiler is directly influenced.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a coal pulverizer wind ring device suitable for debris such as mud, sand in discharge suitable coal, includes the coal pulverizer barrel, the inside fixed mounting of coal pulverizer barrel has quiet ring, the inside of quiet ring is equipped with the moving ring, the ring of keeping out the wind is installed in the outside of moving ring, self-interacting axial seal baffle is installed to the bottom between keeping out the wind ring and the quiet ring, silt discharge channel has been seted up at the middle part between keeping out the wind ring and the quiet ring, two self-interacting axial seal baffle all includes a plurality of blade and locating part, the middle part of locating part and the one end fixed connection of blade, the locating part includes two spacing axle bed and regulating spindle, two the relative one end of spacing axle bed respectively with the both ends fixed connection of regulating spindle.
As a preferable technical scheme of the invention, the middle part of the adjusting shaft is fixedly connected with the blade, the top end of the limiting shaft seat is fixedly connected with one side opposite to the static ring, and the self-adjusting axial sealing baffle is arranged on the static ring through the limiting shaft seat.
As a preferable technical scheme of the invention, the blade is positioned below the static ring, and one side of the top end of the blade is contacted with the opposite side of the wind shielding ring.
When the sediment accumulation weight is larger than the lifting pressure generated by hot air blown from bottom to top, the blades in the self-adjusting axial sealing baffle are deflected at an angle relative to the wind shielding ring, so that the self-adjusting axial sealing baffle is opened, and sediment falls off to be discharged. After the sediment falls off and goes out, the lifting pressure of hot air blown from bottom to top is larger than the blade dead weight of the self-adjusting axial sealing baffle, so that the lifting blade is reset, and the self-adjusting axial sealing baffle is closed.
Compared with the prior art, the invention has the beneficial effects that:
design coal pulverizer wind ring structure, increase automatic mud, husky trash discharging device, improve the sealing performance of coal pulverizer wind ring simultaneously, reduce the wind leakage of coal pulverizer wind ring, finally reach the purpose that realizes the steady operation of coal pulverizer and promote the coal pulverizer output.
Drawings
FIG. 1 is an internal schematic view of a coal pulverizer bowl of the present invention;
FIG. 2 is a cross-sectional view of the coal pulverizer bowl of the present invention;
FIG. 3 is an enlarged schematic view of the invention at A;
FIG. 4 is a partial schematic view of the present invention;
FIG. 5 is a side view of the self-adjusting axial seal baffle of the present invention;
in the figure: 1. a coal mill barrel; 2. self-adjusting axial sealing baffle; 3. a moving ring; 4. a stationary ring; 5. a sediment discharge passage; 6. a wind shielding ring; 7. a limiting shaft seat; 8. an adjusting shaft; 9. a blade; 11. and a limiting piece.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the invention provides a wind ring device of a coal mill suitable for discharging sundries such as mud, sand and the like in applicable coal, which comprises a coal mill cylinder 1, wherein a static ring 4 is fixedly arranged in the coal mill cylinder 1, a movable ring 3 is arranged in the static ring 4, a wind shielding ring 6 is arranged on the outer side of the movable ring 3, a self-adjusting axial sealing baffle 2 is arranged at the bottom end between the wind shielding ring 6 and the static ring 4, a sediment discharge channel 5 is arranged in the middle between the wind shielding ring 6 and the static ring 4, the two self-adjusting axial sealing baffles 2 respectively comprise a plurality of blades 9 and limiting pieces 11, the middle parts of the limiting pieces 11 are fixedly connected with one ends of the blades 9, the limiting pieces 11 comprise two limiting shaft seats 7 and an adjusting shaft 8, and opposite ends of the two limiting shaft seats 7 are respectively fixedly connected with two ends of the adjusting shaft 8.
The middle part of the adjusting shaft 8 is fixedly connected with the blade 9, the top end of the limiting shaft seat 7 is fixedly connected with one side opposite to the stationary ring 4, and the self-adjusting axial sealing baffle 2 is arranged on the stationary ring 4 through the limiting shaft seat 7.
The blade 9 is positioned below the static ring (4), and one side of the top end of the blade 9 is contacted with the opposite side of the wind shielding ring 6. When the sediment accumulation weight is larger than the lifting pressure generated by hot air blown from bottom to top, the blades in the self-adjusting axial sealing baffle are deflected at an angle relative to the wind shielding ring, so that the self-adjusting axial sealing baffle is opened, and sediment falls off to be discharged. After the sediment falls off and goes out, the lifting pressure of hot air blown from bottom to top is larger than the blade dead weight of the self-adjusting axial sealing baffle, so that the lifting blade is reset, and the self-adjusting axial sealing baffle is closed.
In the invention, a circle of wind shielding ring 6 is additionally arranged on the outer side of blades 9 on a wind ring moving ring 3 of the coal mill, a certain gap is radially reserved between the wind shielding ring 6 and a wind ring static ring 4 of the coal mill, the gap is 6-9mm and is used as a sundry discharging channel of mud, sand and the like, circumferential sealing is realized, a self-adjusting axial sealing baffle plate 2 is additionally arranged at the lower part of the inner side of the static ring 4, the wind pressure effect of an inlet wind chamber at the bottom of the coal mill is utilized when the coal mill starts to operate, the gap self-adjusting axial sealing baffle plate 2 is in a closed state, the axial gap between the self-adjusting axial sealing baffle plate 2 and the inlet edge of the wind shielding ring 6 of the coal mill is 2-3mm, axial sealing is realized, the flow rate of the primary wind which directly enters a grinding area and is regulated by a wind ring device, sundry such as mud, sand and the like are blown over a nozzle of the moving ring 3 to enter the gap by centrifugal force when a grinding disc of the coal mill rotates, the sundry such as mud, sand and the like are guided to the gap through a baffle plate of the static ring 4, the mud and the sand and the like, the sundry is deposited by self-gravity and the like, the sand and the like are deposited by the self-adjusting axial sealing baffle plate, the sand and the like are deposited by self-gravity and the self-adjusting axial sealing baffle plate at the bottom of the coal mill, the coal mill is in a gap, the bottom of the coal mill is in a closed state, the time, the dust sealing system is realized, the dust and the dust is directly discharged and the dust is discharged and the dust and the like, and the dust is discharged into the system by the dust and the dust is directly through the gap, and the dust is discharged by the dust and the sealing system The difficult problem of sundries such as sand and the like is solved, the continuous and efficient operation of the coal mill is guaranteed, sundries such as mud, sand and the like can slide down along a gap discharge channel to be piled up in the gap discharge channel taking a self-adjusting axial sealing baffle plate 2 as a bottom support, the self-adjusting axial sealing baffle plate is provided with a limiting device, the self-adjusting axial sealing baffle plate comprises a limiting shaft seat 7 and an adjusting shaft 8, the openable angle of the self-adjusting axial sealing baffle plate 2 is 0-60 degrees, the self-adjusting axial sealing baffle plate 2 is composed of 12-36 blades 9, each blade 9 is matched with a corresponding limiting device, a limiting piece 11 is composed of a limiting shaft seat 7 with a groove and an adjusting shaft 8 with an end stop block, when the blades 9 are turned over, the groove of the limiting shaft seat 7 limits the rotating angle of the adjusting shaft 8 so as to control the opening degree of the baffle plate, and the self-adjusting axial sealing baffle plate 2 is opened and closed according to the weight of mud and sand and the lifting pressure difference of inlet wind; when mud and sand weight are less than inlet wind lifting pressure, the baffle is closed, when the self-adjusting axial sealing baffle 2 is in a closed state, the self-adjusting axial sealing baffle 2 returns to a horizontal position, the self-adjusting axial sealing baffle can be matched with the limit of the static ring 4 and the limit shaft seat 7 can ensure the matching clearance between the self-adjusting axial sealing baffle 2 and the movable ring 3, the scraping and rubbing of the self-adjusting axial sealing baffle 2 and the movable ring 3 are avoided in the operation process, the primary wind flow after adjustment of the wind ring device is improved, and the coal mill powder outlet efficiency is improved.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (3)
1. The utility model provides a coal pulverizer wind ring device suitable for debris such as mud, sand in discharge suitable coal, includes coal pulverizer barrel (1), its characterized in that: the inside fixed mounting of coal pulverizer barrel (1) has quiet ring (4), the inside of quiet ring (4) is equipped with moving ring (3), moving ring (6) are installed in the outside of moving ring (3), self-interacting axial seal baffle (2) are installed to the bottom between moving ring (6) and quiet ring (4), silt discharge channel (5) have been seted up at the middle part between moving ring (6) and quiet ring (4), two self-interacting axial seal baffle (2) all include a plurality of blade (9) and locating part (11), the middle part of locating part (11) and the one end fixed connection of blade (9), locating part (11) include two spacing axle bed (7) and regulating spindle (8), two the opposite one end of spacing axle bed (7) respectively with the both ends fixed connection of regulating spindle (8).
2. The air ring device of the coal mill suitable for discharging sundries such as mud, sand and the like in applicable coal according to claim 1, wherein the air ring device comprises the following components: the middle part of the adjusting shaft (8) is fixedly connected with the blade (9), and the top end of the limiting shaft seat (7) is fixedly connected with one side opposite to the stationary ring (4).
3. The air ring device of the coal mill suitable for discharging sundries such as mud, sand and the like in applicable coal according to claim 1, wherein the air ring device comprises the following components: the blades (9) are positioned below the static ring (4), and one side of the top ends of the blades (9) is in contact with one side opposite to the wind shielding ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311862300.6A CN117563754A (en) | 2023-12-29 | 2023-12-29 | Coal mill wind ring device suitable for discharging sundries such as mud, sand and the like in applicable coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311862300.6A CN117563754A (en) | 2023-12-29 | 2023-12-29 | Coal mill wind ring device suitable for discharging sundries such as mud, sand and the like in applicable coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117563754A true CN117563754A (en) | 2024-02-20 |
Family
ID=89886440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311862300.6A Pending CN117563754A (en) | 2023-12-29 | 2023-12-29 | Coal mill wind ring device suitable for discharging sundries such as mud, sand and the like in applicable coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117563754A (en) |
-
2023
- 2023-12-29 CN CN202311862300.6A patent/CN117563754A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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