CN110064491A - A kind of medium-speed pulverizer coal powder density and fineness regulation device and application method - Google Patents
A kind of medium-speed pulverizer coal powder density and fineness regulation device and application method Download PDFInfo
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- CN110064491A CN110064491A CN201910424001.1A CN201910424001A CN110064491A CN 110064491 A CN110064491 A CN 110064491A CN 201910424001 A CN201910424001 A CN 201910424001A CN 110064491 A CN110064491 A CN 110064491A
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- 239000003245 coal Substances 0.000 title claims abstract description 154
- 239000000843 powder Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 239000002817 coal dust Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 23
- 210000005239 tubule Anatomy 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000003447 ipsilateral effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000009423 ventilation Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000003801 milling Methods 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000004262 dental pulp cavity Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001550 time effect Effects 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
-
- 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
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
- B02C23/22—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating with recirculation of material to 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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Combined Means For Separation Of Solids (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a kind of medium-speed pulverizer coal powder density and fineness regulation device and application methods, including coal pulverizer ontology, coal spout, material-returning device, primary wind and powder pipeline and the rotating separation device for being arranged in primary wind and powder pipeline entrance, rotating separation device is made of speed regulator, driving motor, deceleration transmission component, seal casing and rotor, power supply driving motor after speed setting unit, motor drive rotor rotation by deceleration component.Coal dust after coal pulverizer milling respectively enters the rotating separation device being distributed on each tube cell by First air carrying, and every rotating separation device adjusts revolving speed by speed setting unit respectively fineness of pulverized coal, tube cell coal dust amount and primary air flow to be adjusted.The present invention can be achieved to the separately adjustable of different tube cell fineness of pulverized coal, coal dust amount and primary air flow, and the electricity of consumption is converted into the mobilization dynamic of primary wind and powder, not only reduces ventilation resistance, can also reduce the power consumption of primary air fan to a certain extent.
Description
Technical field
The invention belongs to coal pulverizer technical fields, and in particular to a kind of medium-speed pulverizer coal powder density and fineness regulation device
And application method.
Background technique
In coal-burning boiler power generation process, coal is ground and is sent into boiler combustion by primary air inlet for coal dust by common coal pulverizer
It burns.Wherein more common coal pulverizer is medium-speed pulverizer.In actual operation, existing fineness of pulverized coal is adjusted and coal powder distribation fills
It sets and comes with some shortcomings: one, since the arrangement of coal pulverizer can not accomplish the resistance of every piece primary air inlet making coal pulverizer identical,
And the real-time and regulating effect of traditional adjustable contraction adjusting method are unsatisfactory, lead in coal pulverizer and boiler operatiopn every
Coal powder density in primary air inlet is uneven, causes boiler combustion situation bad；Existing rotating separation device and adjustable contracting
Aperture apparatus is resistance elements to the flowing of wind powder in pulverized coal preparation system, increases electrical energy consumption of ventilation.
Summary of the invention
The purpose of the present invention is for medium-speed pulverizer fineness of pulverized coal regulating device, coal powder distribation device and First air leveling
Deficiency present in device provides a kind of medium-speed pulverizer coal powder density and fineness regulation device and application method, enhances coal-grinding
Machine is between the adjustability of fineness of pulverized coal tube cell and coal powder density.
The invention is realized by the following technical scheme:
A kind of medium-speed pulverizer coal powder density and fineness regulation device, including coal pulverizer ontology, coal spout, material-returning device and one
Secondary wind powder pipe road, the primary wind and powder pipeline are set to the upper surface of coal pulverizer bodies top top plate；The material-returning device is set to mill
The inside of coal machine ontology is fixedly installed along the lower end surface of coal pulverizer bodies top top plate, is connected with the primary wind and powder pipeline；
The coal spout and primary wind and powder pipeline are ipsilateral, and at the top roof center of coal pulverizer ontology, the upper surface of coal spout is set
In the outside of coal pulverizer ontology, lower end surface passes through material-returning device and protrudes into coal pulverizer body interior, and described device further includes being arranged in
The rotating separation device of primary wind and powder pipeline entrance, the rotating separation device is by speed regulator, driving motor, biography of slowing down
Dynamic component, seal casing and rotor composition, the driving motor is set on the top top plate of coal pulverizer ontology, by speed regulator
It is controlled, positioned at the side of primary wind and powder pipeline；The seal casing is set to inside material-returning device, and the top of seal casing is logical
It crosses and is weldingly fixed on the top top plate of coal pulverizer ontology, lower part is fixedly connected with coal spout；It is equipped with and slows down inside seal casing
The rotary shaft of transmission parts, one end of the deceleration transmission component and the output axis connection of driving motor, the other end and rotor connects
It connects；The rotor is set to inside primary wind and powder pipeline, for providing the power of primary wind and powder flowing.
Preferably, the rotating separation device further includes bearing seal housing, seal casing support and sealing air pipeline；
The bearing seal housing is fixed at the top of rotor；The sealing air pipeline is fixed at coal pulverizer bodies top top plate
Upper surface is connected to positioned at the side of primary wind and powder pipeline, and with seal casing；The seal casing support is thin for two or more
Pipe, tubule one end are welded on bearing seal housing and communicate therewith, and the tubule other end is welded on the tube wall of primary air inlet,
And the tube wall that at least one of tubule passes through primary air inlet is connected to sealing air pipeline.
Preferably, the rotary shaft of the rotor and the orifice plane of primary wind and powder pipeline are perpendicular, rotary shaft top seal
In in bearing seal housing, and bearing seal housing clearance fit, the rotary shaft of rotor, which is pierced by bearing seal housing, is equipped with the
One gap；Rotary shaft lower part is located in material-returning device and passes through seal casing, and the rotary shaft of rotor is pierced by seal casing and is equipped with
Second gap.
Preferably, the width in first gap and the second gap is 1-5mm.
Preferably, the deceleration transmission component includes input shaft, transmission shaft, bearing support and output shaft；Wherein, input shaft
Couple with motor, output shaft couples with rotor, and the both ends of transmission shaft couple cooperation with input shaft and output shaft respectively, transmission shaft by
The bearing support being fixed on seal casing is supported fixation.
Preferably, the blade of the rotor is axial flow blower pattern blade, rotor speed 20-400r/min.
Preferably, the primary wind and powder pipeline is equipped with four groups, and the upper surface along coal pulverizer bodies top top plate is circumferentially uniform
Setting.
The present invention also further protects the application method of a kind of medium-speed pulverizer coal powder density and fineness regulation device, including
Following steps:
Step 1: before starting coal pulverizer, to regulating device power transmission；
Step 2: investment sealing air；
Step 3: starting motor, and motor speed adjuster is set in initial speed, initial speed is about the 20%- of maximum speed
40%, motor driving rotor rotation under the control of motor speed adjuster；
Step 4: divulging information by normal flow to coal pulverizer and starting coal pulverizer and feeder, raw coal enters coal-grinding from coal spout
Machine ontology mills through grinding roller and enters regulating device under First air carrying, and coal dust separates under rotor rotation, and rough coal powder drops back into
It is re-grind to material-returning device and being slid by gravity into the mill bowl of coal pulverizer main body, and fine breeze then passes through rotor and enters
Primary wind and powder pipeline is simultaneously admitted to boiler combustion；
Step 5: the revolving speed of the rotor of the rotating separation device in the same direction, on synchronous each coal pipe of increase, makes as-fired coal powder attenuate；
In the same direction, synchronous to reduce rotor speed, keep coal dust thicker；
Step 6: reducing turn of the rotor of rotating separation device on primary air velocity or the higher primary wind and powder pipeline of coal powder density
Speed increases the revolving speed of the rotor of rotating separation device on primary air velocity or the lower primary wind and powder pipeline of coal powder density, realizes one
Secondary wind is mixed well online or each pipe coal powder density is mixed well；
Step 7: maintaining current rotating speed persistently to rotate after the completion of adjusting, until operating condition change deviates again and need to adjust
When, step 5 and step 6 are repeated until fineness of pulverized coal is adjusted to desired value or each pipe deviation and met the requirements.
Compared with prior art, the present invention having the advantage that
A kind of medium-speed pulverizer coal powder density and fineness regulation device of the present invention cancel the original venturi of coal pulverizer
The components such as pipe, rotary separator or adjustable deflector baffle, adjustable contraction, make coal pulverizer respectively export the fineness of pulverized coal of primary air inlet
It can be adjusted independently, in real time with coal powder density, to improve boiler combustion situation；The rotating separation device that each tube cell is respectively arranged
It can be used to fineness of pulverized coal adjusting, it can also be used to the adjusting of coal powder density distribution and primary air flow leveling, while by coal pulverizer
Coal powder distribation device and First air levelling device between fineness of pulverized coal regulating device, coal spout integrate, compared to tradition
Primary air flow levelling device, such as adjustable contraction and fineness of pulverized coal regulating device, such as single rotary separator or static separation
For device, the rotating separation device is substantially without flowing crushing, the mobilization dynamic that the electricity of consumption converts for primary wind and powder,
Ventilation resistance is not only reduced, the power consumption of primary air fan can also be reduced to a certain extent.
Detailed description of the invention
Fig. 1 is general arrangement schematic of the present invention.
Fig. 2 is rotating separation device structural schematic diagram of the present invention.
Fig. 3 is schematic top plan view of the present invention.
Fig. 4 is rotor structure schematic diagram of the present invention.
Fig. 5 is deceleration transmission modular construction schematic diagram of the present invention.
Serial number in figure, 1- coal pulverizer ontology, 2- coal spout, 3- material-returning device, 4- rotating separation device, 5- primary air inlet
Road, 41- speed regulator, 42- driving motor, 43- deceleration transmission component, 44- seal casing, 45- rotor, 46- seal casing
Support, 47- bearing seal housing, 48- sealing air pipeline, the second gap 49-, the first gap 410-, 431- input shaft, 432- are passed
Moving axis, 433- output shaft, 434- bearing support.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
Referring to a kind of medium-speed pulverizer coal powder density shown in Fig. 1-2 and fineness regulation device, including coal pulverizer ontology 1,
Coal spout 2, material-returning device 3 and primary wind and powder pipeline 5, the primary wind and powder pipeline 5 are set to 1 top top plate of coal pulverizer ontology
Upper surface；The material-returning device 3 is set to the inside of coal pulverizer ontology, and along the lower end surface of 1 top top plate of coal pulverizer ontology, fixation is set
It sets, is connected with the primary wind and powder pipeline 5；The coal spout 2 and primary wind and powder pipeline 5 are ipsilateral, set on coal pulverizer ontology 1
At the roof center of top, the upper surface of coal spout 2 is set to the outside of coal pulverizer ontology 1, and lower end surface passes through material-returning device 3 and protrudes into mill
Inside coal machine ontology 1；Described device further includes the rotating separation device 4 for being arranged in 5 entrance of primary wind and powder pipeline, the rotation
Separator is made of speed regulator 41, driving motor 42, deceleration transmission component 43, seal casing 44 and rotor 45, described
Driving motor 42 is set on the top top plate of coal pulverizer ontology 1, is controlled by speed regulator 41, and primary wind and powder pipeline is located at
5 side；The seal casing 44 is set to inside material-returning device 3, and the top of seal casing 44 is fixed by welding in coal pulverizer
On the top top plate of ontology 1, lower part is fixedly connected with coal spout 2；Deceleration transmission component 43 is equipped with inside seal casing 44, it is described
One end of deceleration transmission component 43 and the output axis connection of driving motor 42, the rotation axis connection of the other end and rotor 45 are described
Deceleration transmission component 43 carries out deceleration transmission in the axis of driving motor 42 and the between centers of rotor 45, and pattern includes but is not limited to skin
V belt translation and with conical gear axis transmission；The rotor 45 is set to inside primary wind and powder pipeline 5, for providing primary wind and powder stream
Dynamic power；Position according to device arrangement is different, and the rotating separation device 4 further includes bearing seal housing 47, sealing
Housing support 46 and sealing air pipeline 48；The bearing seal housing 47 is fixed at the top of rotor 45, preferably uses streamline
Type design, to reduce resistance when primary wind and powder flows through the position；The sealing air pipeline 48 is fixed at the top of coal pulverizer ontology 1
The upper surface of portion's top plate is connected to positioned at the side of primary wind and powder pipeline 5, and with seal casing 44；The seal casing support 46
It is welded on bearing seal housing 47 and communicates therewith for two or more tubules, tubule one end, the tubule other end is welded on one
On the tube wall of secondary wind powder pipe 5, and the tube wall that at least one of tubule passes through primary air inlet 5 is connected to sealing air pipeline 48；
Seal casing supports 46 both supports as bearing seal housing 47, also seals wind regime as it, provides it sealing air.
In the present embodiment, the rotary shaft of the rotor 45 and the orifice plane of primary wind and powder pipeline 5 are perpendicular, in rotary shaft
Portion is sealed in bearing seal housing 47, and with 47 clearance fit of bearing seal housing, the rotary shaft of rotor 45 is pierced by bearing seal
47 are equipped with the first gap 410 at housing；Rotary shaft lower part is located in material-returning device 3 and passes through seal casing 44, the rotation of rotor 45
Shaft, which is pierced by seal casing 44, is equipped with the second gap 49.The sealing wind regime is identical as the existing sealing wind regime of coal pulverizer, by close
It seals blower to provide, when sealing air is passed through in the tubule of sealing cover shell support 46 by seal fan, a part of sealing air is passed directly into
It in sealing air pipeline 48 and is further passed through seal casing 44 to be sealed the deceleration transmission component 43 of its inside, another part
Sealing air is first leak into primary wind and powder pipeline 5 from the first gap 410, then from the leakage of the second gap 49 in coal pulverizer and primary wind and powder
Mixing avoids coal dust from entering and pollutes components in seal casing 44, cause to play sealing function to deceleration transmission component 43
The abrasion of mechanical part.
In the present embodiment, the width in first gap 410 and the second gap 49 is 1-5mm.
In the present embodiment, the deceleration transmission component 3 includes input shaft 431, transmission shaft 432, bearing support 434 and output
Axis 433；Wherein, input shaft 431 couples with motor 42, and output shaft 433 couples with rotor 45,432 both ends of transmission shaft band circular cone
Gear simultaneously matches connection with the conical gear of 433 one end of input shaft 431 and output shaft respectively, and transmission shaft 432 is by being welded and fixed
Bearing support 434 on seal casing 44 is supported fixation.
Referring to fig. 4, in the present embodiment, the blade of the rotor 45 is axial flow blower pattern blade, and surface is made at abrasionproof
Reason can select preferable blade and rotor shape according to the power consumption and separating effect of rotating separation device in practical applications certainly
Formula provides the partial power of primary wind and powder flowing using rotor rotational energy or at least not will increase its flow resistance as principle.Rotor
45 rotational speed regulation range can be adjusted within the scope of 40 ~ 100r/min.
Referring to Fig. 3, in the present embodiment, the primary wind and powder pipeline 5 is equipped with four groups, along 1 top top plate of coal pulverizer ontology
Upper surface is circumferentially uniformly arranged.For the part pulverized coal preparation system deployment scenarios of boiler, such as certain two flowings in four coal pipes
Resistance is close, and another two flow resistances are close and the case where with preceding two different froms, it is only necessary to the arrangement two in coal pulverizer outlet
Root exports primary air inlet 5, and installs the rotating separation device 4 respectively in two root canals, and after rotating separation device again
It is four by 5 two points of primary air inlet.
Specific work process of the invention are as follows:
Untreated mixed coal powder is fallen into the groundwork region of coal pulverizer main body 1 through coal spout 2, which includes coal pulverizer
Pedestal, First air air inlet, vane, motor, reduction gearbox, mill bowl, grinding roller etc., are existing traditional coal pulverizer structure.Coal dust warp
It crosses after milling and is carried by First air to the upper space of coal pulverizer, by tearing open to baffle for material-returning device, filled by rotating separation
After setting the rotor 45 of 4 rotations, rough coal powder falls back to material-returning device 3 after being separated by rotor, and is slid by gravity to coal pulverizer
It is re-grind in the mill bowl of main body 1, and then passes through rotor compared with fine breeze and enter primary wind and powder pipeline 5 and be admitted to boiler combustion
It burns.The rotor 45, which is driven by driving motor 42 through deceleration transmission component 43, to be rotated, and power supply is adjusted through motor speed adjuster 41
The movement of control driving motor 42 after whole.It in the process of running, can be to coal by adjusting each 4 revolving speed of rotating separation device in the same direction
Powder fineness is adjusted synchronously；It can be to each primary wind and powder pipeline 5 individually by adjusting each 4 revolving speed of rotating separation device respectively
The adjustment of ground progress fineness of pulverized coal and coal powder density.
In conjunction with current existing online primary air velocity, online fineness of pulverized coal and online coal concentration measuring device, to coal dust
The specific method is as follows for the on-line control of fineness, primary air velocity and each pipe coal powder density:
Step 1: before starting coal pulverizer, to regulating device power transmission；
Step 2: investment sealing air；
Step 3: starting motor 42, and motor speed adjuster 41 is set in initial speed 40rpm, motor 42 is in motor speed
The lower driving rotor 45 of the control of adjuster 41 rotates；
Step 4: divulging information by normal flow to coal pulverizer and starting coal pulverizer and feeder, raw coal enters coal-grinding from coal spout 2
Machine ontology mills through grinding roller and enters regulating device 4 under First air carrying, and coal dust separates under the rotation of rotor 45, rough coal powder
Fall back to material-returning device 3 and slid by gravity into the mill bowl of coal pulverizer main body 1 and re-grind, and fine breeze then pass through turn
Son 45 enters primary wind and powder pipeline 5 and is admitted to boiler combustion；
Step 5: the revolving speed of the rotor 45 of the rotating separation device 4 in the same direction, on synchronous each coal pipe of increase, becomes as-fired coal powder
Carefully；In the same direction, synchronous to reduce by 45 revolving speed of rotor, keep coal dust thicker；
Step 6: reducing the rotor 45 of rotating separation device 4 on primary air velocity or the higher primary wind and powder pipeline 5 of coal powder density
Revolving speed increases the revolving speed of the rotor 45 of rotating separation device 4 on primary air velocity or the lower primary wind and powder pipeline 5 of coal powder density,
Realize that First air is mixed well online or each pipe coal powder density is mixed well；
Step 7: maintaining current rotating speed persistently to rotate after the completion of adjusting, until operating condition change deviates again and need to adjust
When, step 5 and step 6 are repeated until fineness of pulverized coal is adjusted to desired value or each pipe deviation and met the requirements.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Claims (8)
1. a kind of medium-speed pulverizer coal powder density and fineness regulation device, including coal pulverizer ontology (1), coal spout (2), returning charge dress
(3) and primary wind and powder pipeline (5) are set, the primary wind and powder pipeline (5) is set to the upper end of top plate at the top of coal pulverizer ontology (1)
Face；The material-returning device (3) is set to the inside of coal pulverizer ontology, and the lower end surface fixation along top plate at the top of coal pulverizer ontology (1) is set
It sets, is connected with the primary wind and powder pipeline (5)；The coal spout (2) and primary wind and powder pipeline (5) are ipsilateral, are set to coal pulverizer
At the top roof center of ontology (1), the upper surface of coal spout (2) is set to the outside of coal pulverizer ontology (1), and lower end surface passes through and returns
It is internal that material device (3) protrudes into coal pulverizer ontology (1), it is characterised in that: described device further includes being arranged in primary wind and powder pipeline (5)
The rotating separation device (4) of entrance, the rotating separation device is by speed regulator (41), driving motor (42), biography of slowing down
Dynamic component (43), seal casing (44) and rotor (45) composition, the driving motor (42) are set to the top of coal pulverizer ontology (1)
It on top plate, is controlled by speed regulator (41), is located at the side of primary wind and powder pipeline (5)；The seal casing (44) sets
Internal in material-returning device (3), the top of seal casing (44) is fixed by welding on the top top plate of coal pulverizer ontology (1),
Lower part is fixedly connected with coal spout (2)；Deceleration transmission component (43) are equipped with inside seal casing (44), the deceleration transmission component
(43) the output axis connection of one end and driving motor (42), the rotation axis connection of the other end and rotor (45)；The rotor
(45) it is set to the power that primary wind and powder pipeline (5) are internal, flow for providing primary wind and powder.
2. a kind of medium-speed pulverizer coal powder density according to claim 1 and fineness regulation device, it is characterised in that: described
Rotating separation device (4) further includes bearing seal housing (47), seal casing support (46) and sealing air pipeline (48)；It is described
Bearing seal housing (47) is fixed at the top of rotor (45)；The sealing air pipeline (48) is fixed at coal pulverizer ontology
(1) upper surface of top top plate, is located at the side of primary wind and powder pipeline (5), and is connected to seal casing (44)；The seal closure
It is two or more tubules that shell, which supports (46), and tubule one end is welded on bearing seal housing (47) and communicates therewith, and tubule is another
One end is welded on the tube wall of primary air inlet (5), and at least one of tubule pass through the tube wall of primary air inlet (5) with it is close
Seal air piping (48) connection.
3. a kind of medium-speed pulverizer coal powder density according to claim 2 and fineness regulation device, it is characterised in that: described
The rotary shaft of rotor (45) and the orifice plane of primary wind and powder pipeline (5) are perpendicular, and rotary shaft top seal is in bearing sealing cover
In shell (47), with bearing seal housing (47) clearance fit, the rotary shaft of rotor (45) is pierced by bearing seal housing (47) and sets
There are the first gap (410)；Rotary shaft lower part is located in material-returning device (3) and passes through seal casing (44), the rotation of rotor (45)
Axis is pierced by seal casing (44) and is equipped with the second gap (49).
4. a kind of medium-speed pulverizer coal powder density according to claim 3 and fineness regulation device, it is characterised in that: described
The width of first gap (410) and the second gap (49) is 1-5mm.
5. a kind of medium-speed pulverizer coal powder density according to claim 1 and fineness regulation device, it is characterised in that: described
Deceleration transmission component (3) includes input shaft (431), transmission shaft (432), bearing support (434) and output shaft (433)；Wherein,
Input shaft (431) couples with motor (42), and output shaft (433) couples with rotor (45), the both ends of transmission shaft (432) respectively with it is defeated
Enter axis (431) and output shaft (433) connection cooperation, transmission shaft (432) is by the bearing support that is fixed on seal casing (44)
(434) it is supported fixation.
6. a kind of medium-speed pulverizer coal powder density according to claim 1 and fineness regulation device, it is characterised in that: described
The blade of rotor 45 is axial flow blower pattern blade, rotor speed 20-400r/min.
7. a kind of medium-speed pulverizer coal powder density according to claim 1 and fineness regulation device, it is characterised in that: described
Primary wind and powder pipeline (5) is equipped with four groups, and the upper surface along top plate at the top of coal pulverizer ontology (1) is circumferentially uniformly arranged.
8. the application method of a kind of medium-speed pulverizer coal powder density as claimed in claim 2 and fineness regulation device, feature
It is, includes the following steps:
Step 1: before starting coal pulverizer, to regulating device power transmission；
Step 2: investment sealing air；
Step 3: starting motor (42), and motor speed adjuster (41) is set in initial speed, initial speed is about that highest turns
The 20%-40% of speed, motor (42) driving rotor (45) in the case where motor speed adjuster (41) control rotate；
Step 4: divulging information by normal flow to coal pulverizer and starting coal pulverizer and feeder, raw coal enters mill at coal spout (2)
Coal machine ontology mills through grinding roller and enters regulating device (4) under First air carrying, and coal dust is separated in the case where rotor (45) rotate,
Rough coal powder, which falls back to material-returning device (3) and slid by gravity into the mill bowl of coal pulverizer main body (1), to be re-grind, and duff
Powder then passes through rotor (45) into primary wind and powder pipeline (5) and is admitted to boiler combustion；
Step 5: the revolving speed of the rotor (45) of the rotating separation device (4) in the same direction, on synchronous each coal pipe of increase, makes as-fired coal
Powder attenuates；In the same direction, synchronous to reduce rotor (45) revolving speed, keep coal dust thicker；
Step 6: reducing the rotor of rotating separation device (4) on primary air velocity or the higher primary wind and powder pipeline (5) of coal powder density
(45) revolving speed increases the rotor of rotating separation device (4) on primary air velocity or the lower primary wind and powder pipeline (5) of coal powder density
(45) revolving speed realizes that First air is mixed well online or each pipe coal powder density is mixed well；
Step 7: maintaining current rotating speed persistently to rotate after the completion of adjusting, until operating condition change deviates again and need to adjust
When, step 5 and step 6 are repeated until fineness of pulverized coal is adjusted to desired value or each pipe deviation and met the requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910424001.1A CN110064491B (en) | 2019-05-21 | 2019-05-21 | Medium speed coal mill pulverized coal concentration and fineness adjusting device and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910424001.1A CN110064491B (en) | 2019-05-21 | 2019-05-21 | Medium speed coal mill pulverized coal concentration and fineness adjusting device and application method |
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| CN210207166U (en) * | 2019-05-21 | 2020-03-31 | 江苏方天电力技术有限公司 | Medium speed pulverizer buggy concentration and fineness adjusting device |
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| JPH11351551A (en) * | 1998-06-10 | 1999-12-24 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for controlling coal feeder of finely pulverized coal firing boiler |
| US20040227024A1 (en) * | 2003-05-13 | 2004-11-18 | Bharat Heavy Electricals Ltd. | Bowl mill for a coal pulverizer with an air mill for primary entry of air |
| WO2014082596A1 (en) * | 2012-11-30 | 2014-06-05 | Huang Lina | High-efficiency, serial biaxial dynamic classification and recovered dust milling apparatus with automatic baffleplate regulation |
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| CN110064491B (en) | 2023-11-28 |
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