CN105698206B - Coal pulverizer exports rapid closing device and mill coal pulverizer system - Google Patents
Coal pulverizer exports rapid closing device and mill coal pulverizer system Download PDFInfo
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- CN105698206B CN105698206B CN201410707678.3A CN201410707678A CN105698206B CN 105698206 B CN105698206 B CN 105698206B CN 201410707678 A CN201410707678 A CN 201410707678A CN 105698206 B CN105698206 B CN 105698206B
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- 239000003245 coal Substances 0.000 title claims abstract description 227
- 238000007789 sealing Methods 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000012856 packing Methods 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 description 54
- 239000000203 mixture Substances 0.000 description 25
- 230000006870 function Effects 0.000 description 18
- 238000009434 installation Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 9
- 239000002817 coal dust Substances 0.000 description 7
- 238000004590 computer program Methods 0.000 description 7
- 238000002955 isolation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009975 flexible effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
A kind of coal pulverizer outlet rapid closing device and mill coal pulverizer system, coal pulverizer outlet rapid closing device include：Rectangle sealed box body is welded on by two bottom surfaces between two sections of pulverized coal feed pipes；Two the first sealing plates are arranged on two opposite sides of rectangle sealed box body；Baffle mechanism is made of multiple baffles and multiple shafts, and multiple shaft both ends are parallel respectively to be fixed on other two opposite side of rectangle sealed box body, and the first sealing plate and shaft are in approximately the same plane；Along rotor shaft direction, one side of the upper bottom surface of each baffle is respectively provided with a L-shaped notch with the opposite side of bottom surface；Transmission mechanism is separately connected with multiple shafts；Driving device connects transmission mechanism；Ring packing air hose is sleeved on rectangle sealed box body lateral surface, and the lateral surface of ring packing air hose is provided with sealing air access port, and the medial surface of ring packing air hose is provided with multiple sealing wind inlets, and sealing air is introduced into rectangle sealed box body by sealing wind inlet.
Description
Technical field
The present invention relates to the pulverized coal preparation system technologies in electric boiler, and rapid closing device is exported especially with regard to a kind of coal pulverizer
And mill coal pulverizer system.
Background technology
In pressurized direct pulverizing coal system station boiler, by a certain number of defeated powder between coal pulverizer outlet and burner
Pipeline connects, and general Process In A Tangential Firing separate unit coal pulverizer matches four duff pipes, Opposite Firing Boiler separate unit coal pulverizer
With 4-6 root duff pipes.According to air motion direction on pulverized coal feed pipe, generally installing coal pulverizer exports rapid closing device successively,
Drag regulator (shrinkage cavity), coal-powder sampling device, wind speed measuring device etc..
Coal pulverizer is exported rapid closing device and is controlled using pneumatic actuator, and baffle is insertion plate door, and can be tripped thing with coal pulverizer
Therefore fuel is closed and shut off under operating mode rapidly, and when coal pulverizer is normally stopped transport, outlet portal can be also closed, for closing coal pulverizer,
Cut off wind powder transfer passage.
Since coal pulverizer exports the variant of each pulverized coal feed pipe length and trend, wind powder mixture flow resistance inside it
There are larger differences, the resistance pieces such as throttling set are installed usually on pulverized coal feed pipe, to adjust the wind powder gas on each pulverized coal feed pipe
The flow resistance of stream so that wind speed, pulverized-coal concentration at burner nozzle corresponding with same coal pulverizer etc. are uniform.
It is installed with outlet portal and drag regulator on existing station boiler coal pulverizer pulverized coal feed pipe, but all uses substantially
The mode being provided separately, outlet portal are insertion plate door (label 1 in Fig. 1), the opening and closing of pneumatic control door are generally used, for closing
Coal pulverizer exports contacting between pulverized coal feed pipe and hearth combustor；Resistance throttling set (label 2 in Fig. 1) is adjusted manually may be used
Based on regulating device, a small number of boilers install fixation type throttle shrinkage cavity, by pre-set throttle resistance, adjust and pass through the dress
The wind powder mixture speed postponed.It is as shown in Figure 1 that outlet portal and throttling set are installed separately arrangement signal on pulverized coal preparation system.Figure
In 1,1 is outlet portal, and 2 be drag regulator, and 3 be wind speed or coal powder density test device, and 4 are adjusted for coal pulverizer inlet hot wind
Baffle, 5 be coal pulverizer inlet cold wind controllable register, and 6 be the total air door of coal pulverizer inlet, and 7 be coal pulverizer inlet apparatus for measuring air quantity.
Coal pulverizer is exported to the pulverized coal feed pipe between burner, is limited to by pipe arrangement and duct length, outlet portal and
Drag regulator installation site is not ideal enough, and especially lowest level coal pulverizer absolute altitude is relatively low, is connected with coal pulverizer outlet
Pulverized coal channel is apart from short, and pulverized coal feed pipe elbow is more, and using mode arranged apart, installation site closely, influences duff pipe
The uniformity that breeze airflow flows in road, large error is brought to coal-powder sampling and measuring wind speed.In addition, using outlet portal and resistance
Apparatus for adjusting force mode arranged apart increases the purchase cost and repair and maintenance workload of equipment.
Invention content
The present invention provides a kind of coal pulverizer outlet rapid closing device and mill coal pulverizer systems, to solve pulverized coal feed pipe mistake
The short and installation site brought it is limited and thus caused by breeze airflow is uneven, field test data is inaccurate problem, and
Reduce cost.
To achieve the goals above, an embodiment of the present invention provides a kind of coal pulverizers to export rapid closing device, the mill
Coal machine exports rapid closing device：
Rectangle sealed box body, the rectangle sealed box body are welded on by two bottom surfaces between two sections of pulverized coal feed pipes；
Two the first sealing plates are arranged on two opposite sides of the rectangle sealed box body；
Baffle mechanism by multiple baffles and drives multiple shafts of flapper to constitute, and multiple shaft both ends difference are parallel
It is fixed on other two opposite side of the rectangle sealed box body, and first sealing plate exists with the shaft
In approximately the same plane；Along rotor shaft direction, one side of the upper bottom surface of each baffle and the opposite side of bottom surface are respectively provided with one and L-shaped lack
Mouthful so that when the shutters are closed, notch between adjacent screen cooperates, and the notch of outermost side shield one with it is described
First sealing plate cooperates；
Transmission mechanism is separately connected with multiple shafts；
Driving device connects the transmission mechanism, for driving the transmission mechanism；
Ring packing air hose, is sleeved on the rectangle sealed box body lateral surface, and the lateral surface of the ring packing air hose is set
It is equipped with sealing air access port, the medial surface of the ring packing air hose is provided with multiple sealing wind inlets, the sealing wind inlet
Sealing air is introduced into the rectangle sealed box body.
In one embodiment, coal pulverizer outlet rapid closing device further includes：
Multipair second sealing plate is arranged on two opposite sides of the fixation shaft, and with multiple described turns
Axis in the same plane, the discrete both sides in a shaft wherein one end of each pair of second sealing plate so that when the shutters are closed, often
Second sealing plate is coordinated with the notch on baffle both sides respectively.
In one embodiment, the driving device is pneumatically or electrically driving device.
In one embodiment, the number of the baffle mechanism is 5.
To achieve the goals above, the embodiment of the present invention provides a kind of mill coal pulverizer system, the pulverized coal preparation system packet
It includes：Coal pulverizer is connected to a plurality of pulverized coal channel of the coal pulverizer, the measuring wind speed dress being arranged on every pulverized coal channel
The coal pulverizer as described in claim 1 outlet rapid closing device set and be arranged on every pulverized coal channel.
In one embodiment, coal pulverizer outlet rapid closing device further includes：
Multipair second sealing plate is arranged on two opposite sides of the fixation shaft, and with multiple described turns
Axis in the same plane, the discrete both sides in a shaft wherein one end of each pair of second sealing plate so that when the shutters are closed, often
Second sealing plate is coordinated with the notch on baffle both sides respectively.
In one embodiment, the driving device is pneumatically or electrically driving device.
In one embodiment, the number of the baffle mechanism is 5.
The advantageous effect of the embodiment of the present invention is：
By traditional coal pulverizer outlet portal and drag regulator " two-in-one ", rapid closing can be met and adjust pulverized coal channel
Resistance reduces the equipment installed on pulverized coal feed pipe, mitigates repair and maintenance workload；
After pulverized coal preparation system coal pulverizer outlet rapid closing device using the present invention, pulverized coal feed pipe reduces by one group of installing component,
It is installed on pulverized coal feed pipe for wind speed measuring device and position that is more preferable, more meeting code requirement is provided creates conditions, and then effectively
Solve the wind powder mixture poor fluidity and wind that most power plant pulverized coal preparation system pulverized coal channel is too short and installation space is insufficient and brings
The problems such as powder air-flow is uneven better meets on-the-spot test requirement.
New device uses pneumatic control mode, has both coal pulverizer outlet rapid closing device and resistance regulation function, and energy
Remote operation makes it possible that pulverized coal feed pipe resistance random groups operation state is adjusted, and the control for improving drag regulator is flexible
Property, it accurately controls and creates conditions for the dynamic of each angle coal dust speed of combustion process, concentration etc.；
Using multiple-blade baffle forms, each blade synchronization adjustment avoids traditional two-piece type shrinkage cavity (shown in Fig. 1) resistance regulation
Not linear, non-uniform problem, and then improve breeze airflow in pulverized coal channel and flowed afterwards by drag regulator (shrinkage cavity)
Uniformity is conducive to promote coal powder density, and the representativeness and accuracy of breeze airflow sampling improve the accuracy of measuring wind speed；
There is sealing air of the sealing air as the present apparatus using cold First air or enchashment, accesses annular sealing air pipe, effectively solve
Certainly traditional shrinkage cavity accumulated powder blockage problem, lifting device reliability；After avoiding traditional coal pulverizer outlet rapid closing device to block simultaneously
Close the slow or close problem that is not closed completely.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is existing mill coal pulverizer system structural schematic diagram；
Fig. 2 is that the coal pulverizer of the embodiment of the present invention exports the vertical view of rapid closing device；
Fig. 3 is that the coal pulverizer of the embodiment of the present invention exports rapid closing device side view；
Fig. 4 is the connection diagram of the rectangle sealed box body and pulverized coal feed pipe of the embodiment of the present invention；
Fig. 5 is the enlarged drawing of baffle and the first sealing plate in Fig. 3 of the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of multipair second sealing plate 20 of the embodiment of the present invention；
Fig. 7 and Fig. 8 is the status diagram of the second sealing plate 20 of the embodiment of the present invention；
Fig. 9 is the mill coal pulverizer system structural schematic diagram of the embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In conjunction with shown in Fig. 2 and Fig. 3, the present invention provides a kind of coal pulverizer outlet rapid closing device, coal pulverizer outlet
Rapid closing device includes：Rectangle sealed box body 9, two the first sealing plates 3, baffle mechanism, transmission mechanism 6, driving device 7 and
Ring packing air hose.
As shown in figure 4, rectangle sealed box body 9, is welded on by two bottom surfaces between two section of 10 pulverized coal feed pipe 11.Two
One sealing plate 3, baffle mechanism and transmission mechanism 6 are arranged inside rectangle sealed box body 9, and driving device 7 is arranged rectangular
Outside shape sealed box body 9, it is not shown in Fig. 4.
As shown in Figures 2 and 3, two the first sealing plates 3 are separately positioned on two opposite sides of rectangle sealed box body 9
On face 12,13.
Baffle mechanism is by multiple baffles 1 and multiple shafts 2 of flapper is driven to constitute, and 2 both ends of multiple shafts are put down respectively
Row is fixed on other two opposite side 14,15 of rectangle sealed box body 9, and two the first sealing plates 3 and shaft 2
In approximately the same plane.As depicted in figs. 3 and 5, along rotor shaft direction, one side 16 and the bottom surface of the upper bottom surface of each baffle 1
Opposite side 17 is respectively provided with a L-shaped notch (or being groove) 18 so that when baffle 1 is closed, the notch between adjacent screen
It can cooperate and the notch of outermost side shield one cooperates with first sealing plate.Baffle 1 be closed when baffle it
Between correlation as shown in figure 5, adjacent screen fit together after and outermost two baffles and two the first sealing plates
After 3 fittings, L-shaped notch is filled up, good sealing function is played, can guarantee can effectively block gas after blade damper is closed
Stream passes through, and realizes reliable block.
Transmission mechanism 6 is separately connected with multiple shafts 2.Driving device 7 connects transmission mechanism 6, dynamic with drive transmission device
Make, multiple shafts 2 is driven to rotate respectively, final that baffle 1 is driven to be rotated around shaft, baffle 1 keeps off for blade in one embodiment
Plate, invention is not limited thereto.
As shown in Fig. 2, ring packing wind pipeline 4 is sleeved on the lateral surface of rectangle sealed box body 9, ring packing air hose 9
Lateral surface is provided with sealing air access port 8, and the medial surface of ring packing air hose is provided with multiple sealing wind inlets 19, sealing air into
Sealing air is introduced into rectangle sealed box body 9 by mouth 19.Sealing air access port 8 enters coal pulverizer outlet to sealing air as shown in Figure 2
The ring packing wind pipeline 4 of rapid closing device.It is 2 times of wind powder mixture pressure in pulverized coal feed pipe or so to seal wind pressure, can
By entering the inside of rectangle sealed box body 9 by multiple directions by multiple sealing wind inlets 19, and by blade damper and defeated powder
Gap between pipeline enters pulverized coal feed pipe, plays the role of that coal dust is blocked to enter inside coal pulverizer outlet rapid closing device,
It avoids coal dust from accumulating blocking blades baffle or transmission mechanism, influences the flexibility of mechanism adjusting.
As the above analysis, when wind powder mixture flows through the coal pulverizer outlet rapid closing device of the present invention, the coal pulverizer
Outlet rapid closing device will produce different system resistance under different opening position, and then influence the flowing speed of wind powder mixture
Degree and coal powder density.Wind powder mixture and the cooperation of the wind speed measuring device (can also be coal concentration measuring device) 2 in downstream make
With by the aperture for dynamically adjusting coal pulverizer outlet rapid closing device inner vanes baffle so that the wind speed that device 2 monitors
(being measured by wind speed measuring device) or coal powder density (being measured by coal concentration measuring device) unanimously, are achieved in dynamic regulation
Purpose.
When " when coal pulverizer outlet rapid closing device receives an out code, it is rapid that driving device 7 controls blade damper
It closes to minimum aperture, realizes the closing and isolation to pulverized coal feed pipe, be achieved in the quick closedown work(of coal pulverizer outlet damper
Energy.
Rapid closing device is exported using the coal pulverizer of the present invention so that is mixed by the wind powder that coal pulverizer comes out into pulverized coal feed pipe
Close object, it is only necessary to export rapid closing device by a coal pulverizer with resistance regulation function, you can while realizing each duff pipe
The dynamic regulation of flow velocity and closing isolation function in road, and ensure that each angle wind powder mixture wind speed is consistent so that in pulverized coal feed pipe
Wind powder mixture flow field evenly, to carry for the installation of wind speed measuring device or coal concentration measuring device on pulverized coal feed pipe
It creates conditions for position that is more preferable, more meeting code requirement, effectively the most power plants' pulverized coal preparation system pulverized coal channels of solution are too short and pacify
Dress insufficient space and bring wind powder mixture poor fluidity and uneven wind powder air-flow the problems such as, better meet on-the-spot test
It is required that.
Above-mentioned coal pulverizer export rapid closing device only in rectangle sealed box body 9 two of unlocked shaft 2 it is opposite
Side (two sides for being parallel to shaft) 12,13 on be mounted with two the first sealing plates 3, not the two of fixed rotating shaft 2
Fixing seal baffle on a opposite side 14,15.In order to enable better tightness, in one embodiment, as shown in fig. 6,
Be provided with multipair second sealing plate 20 on two opposite sides 14,15 of fixed rotating shaft 2, multipair second sealing plate 20 with it is multiple
Shaft 2 in the same plane, the discrete both sides in a shaft wherein one end of two panels baffle of each pair of second sealing plate so that when
When baffle is closed, each pair of second sealing plate coordinates with the notch on corresponding baffle both sides respectively.With reference to Fig. 7 and Fig. 8, with side
One of on side 14 for shaft 2, illustrate how to realize sealing by each pair of second sealing plate 20.As shown in fig. 7, side
Fixed shaft 2 rotates on 14, drives baffle 1 to rotate clockwise, so that it may which, to obtain closed state shown in Fig. 8, this is to second
Two block baffles 21,22 of sealing plate 20 have filled up the L-shaped notch 18 of baffle 1 respectively, realize better seal.
Above-mentioned driving device 7 can be pneumatically or electrically driving device, for example, electric motor or pneumatic motor.Mill
Coal machine export rapid closing device transmission mechanism 6 by pneumatically or electrically driving device drive, can the quick closedown in 3s, meet thing
Therefore the requirement of operating mode or the normal quick fuel shutoff of stoppage in transit operating mode.
In one embodiment, the number of baffle mechanism is 5, and invention is not limited thereto.Blade damper can be by wear-resisting
Damage alloy is made, and totally 5 are enclosed in rectangle sealed box body (metal shell) 9, and are installed in pulverized coal channel, such as Fig. 3 institutes
Show, blade is opened and closed simultaneously under the drive of transmission device 7, is played and is closed baffle or uniform throttling action.Coal pulverizer outlet speed is closed
The Multi-vane type baffle arrangement of door gear, blade action is more flexible, and resistance regulation is uniform, reaches even regulation flow velocity, ensures section
The effect of the consistency in flow field after stream.In addition, the blade damper of coal pulverizer outlet rapid closing device can be in completely open and close range
Interior realization pneumatic control adjusts operation so that mill coal pulverizer system is dynamic in progress pulverized coal channel system resistance during normal operation
State adjustment is possibly realized.
After exporting rapid closing device using coal pulverizer, the pulverized coal feed pipe of mill coal pulverizer system cancels one group of installing component
(cancelling 1,2 in Fig. 1), by realizing its original function using coal pulverizer outlet rapid closing device.Its course of work is：
Rapid closing device is exported using the coal pulverizer of the present invention so that is mixed by the wind powder that coal pulverizer comes out into pulverized coal feed pipe
Close object, it is only necessary to close the door by the coal pulverizer outlet speed with resistance regulation function, you can while realizing in each pulverized coal feed pipe
The dynamic regulation and closing isolation function of flow velocity, and ensure that each angle wind powder mixture wind speed is consistent so that wind powder in pulverized coal feed pipe
Mixture flow field evenly, to being provided more for the installation of wind speed measuring device or coal concentration measuring device on pulverized coal feed pipe
Position that is good, more meeting code requirement creates conditions, and it is too short empty with installation effectively to solve most power plant pulverized coal preparation system pulverized coal channel
Between it is insufficient and bring wind powder mixture poor fluidity and uneven wind powder air-flow the problems such as, better meet on-the-spot test and want
It asks.
In conclusion the advantageous effect of the embodiment of the present invention is：
By traditional coal pulverizer outlet portal and drag regulator " two-in-one ", rapid closing can be met and adjust pulverized coal channel
Resistance reduces the equipment installed on pulverized coal feed pipe, mitigates repair and maintenance workload；
After pulverized coal preparation system coal pulverizer outlet rapid closing device using the present invention, pulverized coal feed pipe reduces by one group of installing component,
It is installed on pulverized coal feed pipe for wind speed measuring device and position that is more preferable, more meeting code requirement is provided creates conditions, and then effectively
Solve the wind powder mixture poor fluidity and wind that most power plant pulverized coal preparation system pulverized coal channel is too short and installation space is insufficient and brings
The problems such as powder air-flow is uneven better meets on-the-spot test requirement.
New device uses pneumatic control mode, has both coal pulverizer outlet rapid closing device and resistance regulation function, and energy
Remote operation makes it possible that pulverized coal feed pipe resistance random groups operation state is adjusted, and the control for improving drag regulator is flexible
Property, it accurately controls and creates conditions for the dynamic of each angle coal dust speed of combustion process, concentration etc.；
Using multiple-blade baffle forms, each blade synchronization adjustment avoids traditional two-piece type shrinkage cavity (shown in Fig. 1) resistance regulation
Not linear, non-uniform problem, and then improve breeze airflow in pulverized coal channel and flowed afterwards by drag regulator (shrinkage cavity)
Uniformity is conducive to promote coal powder density, and the representativeness and accuracy of breeze airflow sampling improve the accuracy of measuring wind speed；
There is sealing air of the sealing air as the present apparatus using cold First air or enchashment, accesses annular sealing air pipe, effectively solve
Certainly traditional shrinkage cavity accumulated powder blockage problem, lifting device reliability；After avoiding traditional coal pulverizer outlet rapid closing device to block simultaneously
Close the slow or close problem that is not closed completely.
As shown in figure 9, the embodiment of the present invention provides a kind of pulverized coal preparation system, the pulverized coal preparation system includes：Coal pulverizer, connection
To a plurality of pulverized coal channel 901 of the coal pulverizer, the wind speed measuring device 902 on every pulverized coal channel 901 and setting are set
Coal pulverizer on every pulverized coal channel 901 exports rapid closing device 903.
In conjunction with shown in Fig. 2 and Fig. 3, the coal pulverizer outlet rapid closing device 903 in Fig. 9 includes：Rectangle sealed box body 9,
Two the first sealing plates 3, baffle mechanism, transmission mechanism 6, driving device 7 and ring packing air hose.
As shown in figure 4, rectangle sealed box body 9, is welded on by two bottom surfaces between two section of 10 pulverized coal feed pipe 11.Two
One sealing plate 3, baffle mechanism and transmission mechanism 6 are arranged inside rectangle sealed box body 9, and driving device 7 is arranged rectangular
Outside shape sealed box body 9, it is not shown in Fig. 4.
As shown in Figures 2 and 3, two the first sealing plates 3 are separately positioned on two opposite sides of rectangle sealed box body 9
On face 12,13.
Baffle mechanism is by multiple baffles 1 and multiple shafts 2 of flapper is driven to constitute, and 2 both ends of multiple shafts are put down respectively
Row is fixed on other two opposite side 14,15 of rectangle sealed box body 9, and two the first sealing plates 3 and shaft 2
In approximately the same plane.As depicted in figs. 3 and 5, along rotor shaft direction, one side 16 and the bottom surface of the upper bottom surface of each baffle 1
Opposite side 17 is respectively provided with a L-shaped notch (or being groove) 18 so that when baffle 1 is closed, the notch between adjacent screen
It can cooperate and the notch of outermost side shield one cooperates with first sealing plate.Baffle 1 be closed when baffle it
Between correlation as shown in figure 5, adjacent screen fit together after and outermost two baffles and two the first sealing plates
After 3 fittings, L-shaped notch is filled up, good sealing function is played, can guarantee can effectively block gas after blade damper is closed
Stream passes through, and realizes reliable block.
Transmission mechanism 6 is separately connected with multiple shafts 2.Driving device 7 connects transmission mechanism 6, dynamic with drive transmission device
Make, multiple shafts 2 is driven to rotate respectively, final that baffle 1 is driven to be rotated around shaft, baffle 1 keeps off for blade in one embodiment
Plate, invention is not limited thereto.
As shown in Fig. 2, ring packing wind pipeline 4 is sleeved on the lateral surface of rectangle sealed box body 9, ring packing air hose 9
Lateral surface is provided with sealing air access port 8, and the medial surface of ring packing air hose is provided with multiple sealing wind inlets 19, sealing air into
Sealing air is introduced into rectangle sealed box body 9 by mouth 19.Sealing air access port 8 enters coal pulverizer outlet to sealing air as shown in Figure 2
The ring packing wind pipeline 4 of rapid closing device.It is 2 times of wind powder mixture pressure in pulverized coal feed pipe or so to seal wind pressure, can
By entering the inside of rectangle sealed box body 9 by multiple directions by multiple sealing wind inlets 19, and by blade damper and defeated powder
Gap between pipeline enters pulverized coal feed pipe, plays the role of that coal dust is blocked to enter inside coal pulverizer outlet rapid closing device,
It avoids coal dust from accumulating blocking blades baffle or transmission mechanism, influences the flexibility of mechanism adjusting.
As the above analysis, when wind powder mixture flows through the coal pulverizer outlet rapid closing device of the present invention, the coal pulverizer
Outlet rapid closing device will produce different system resistance under different opening position, and then influence the flowing speed of wind powder mixture
Degree and coal powder density.Wind powder mixture and the cooperation of the wind speed measuring device (can also be coal concentration measuring device) 2 in downstream make
With by the aperture for dynamically adjusting coal pulverizer outlet rapid closing device inner vanes baffle so that the wind speed that device 2 monitors
(being measured by wind speed measuring device) or coal powder density (being measured by coal concentration measuring device) unanimously, are achieved in dynamic regulation
Purpose.
When " when coal pulverizer outlet rapid closing device receives an out code, it is rapid that driving device 7 controls blade damper
It closes to minimum aperture, realizes the closing and isolation to pulverized coal feed pipe, be achieved in the quick closedown work(of coal pulverizer outlet damper
Energy.
Rapid closing device is exported using the coal pulverizer of the present invention so that is mixed by the wind powder that coal pulverizer comes out into pulverized coal feed pipe
Close object, it is only necessary to export rapid closing device by a coal pulverizer with resistance regulation function, you can while realizing each duff pipe
The dynamic regulation of flow velocity and closing isolation function in road, and ensure that each angle wind powder mixture wind speed is consistent so that in pulverized coal feed pipe
Wind powder mixture flow field evenly, to carry for the installation of wind speed measuring device or coal concentration measuring device on pulverized coal feed pipe
It creates conditions for position that is more preferable, more meeting code requirement, effectively the most power plants' pulverized coal preparation system pulverized coal channels of solution are too short and pacify
Dress insufficient space and bring wind powder mixture poor fluidity and uneven wind powder air-flow the problems such as, better meet on-the-spot test
It is required that.
Above-mentioned coal pulverizer export rapid closing device only in rectangle sealed box body 9 two of unlocked shaft 2 it is opposite
Side (two sides for being parallel to shaft) 12,13 on be mounted with two the first sealing plates 3, not the two of fixed rotating shaft 2
Fixing seal baffle on a opposite side 14,15.In order to enable better tightness, in one embodiment, as shown in fig. 6,
Be provided with multipair second sealing plate 20 on two opposite sides 14,15 of fixed rotating shaft 2, multipair second sealing plate 20 with it is multiple
Shaft 2 in the same plane, the discrete both sides in a shaft wherein one end of two panels baffle of each pair of second sealing plate so that when
When baffle is closed, each pair of second sealing plate coordinates with the notch on corresponding baffle both sides respectively.With reference to Fig. 7 and Fig. 8, with side
One of on side 14 for shaft 2, illustrate how to realize sealing by each pair of second sealing plate 20.As shown in fig. 7, side
Fixed shaft 2 rotates on 14, drives baffle 1 to rotate clockwise, so that it may which, to obtain closed state shown in Fig. 8, this is to second
Two block baffles 21,22 of sealing plate 20 have filled up the L-shaped notch 18 of baffle 1 respectively, realize better seal.
Above-mentioned driving device 7 can be pneumatically or electrically driving device, for example, electric motor or pneumatic motor.Mill
Coal machine export rapid closing device transmission mechanism 6 by pneumatically or electrically driving device drive, can the quick closedown in 3s, meet thing
Therefore the requirement of operating mode or the normal quick fuel shutoff of stoppage in transit operating mode.
In one embodiment, the number of baffle mechanism is 5, and invention is not limited thereto.Blade damper can be by wear-resisting
Damage alloy is made, and totally 5 are enclosed in rectangle sealed box body (metal shell) 9, and are installed in pulverized coal channel, such as Fig. 3 institutes
Show, blade is opened and closed simultaneously under the drive of transmission device 7, is played and is closed baffle or uniform throttling action.Coal pulverizer outlet speed is closed
The Multi-vane type baffle arrangement of door gear, blade action is more flexible, and resistance regulation is uniform, reaches even regulation flow velocity, ensures section
The effect of the consistency in flow field after stream.In addition, the blade damper of coal pulverizer outlet rapid closing device can be in completely open and close range
Interior realization pneumatic control adjusts operation so that mill coal pulverizer system is dynamic in progress pulverized coal channel system resistance during normal operation
State adjustment is possibly realized.
After exporting rapid closing device using coal pulverizer, the pulverized coal feed pipe of mill coal pulverizer system cancels one group of installing component
(cancelling 1,2 in Fig. 1), by realizing its original function using coal pulverizer outlet rapid closing device.Its course of work is：
Rapid closing device is exported using the coal pulverizer of the present invention so that is mixed by the wind powder that coal pulverizer comes out into pulverized coal feed pipe
Close object, it is only necessary to close the door by the coal pulverizer outlet speed with resistance regulation function, you can while realizing in each pulverized coal feed pipe
The dynamic regulation and closing isolation function of flow velocity, and ensure that each angle wind powder mixture wind speed is consistent so that wind powder in pulverized coal feed pipe
Mixture flow field evenly, to being provided more for the installation of wind speed measuring device or coal concentration measuring device on pulverized coal feed pipe
Position that is good, more meeting code requirement creates conditions, and it is too short empty with installation effectively to solve most power plant pulverized coal preparation system pulverized coal channel
Between it is insufficient and bring wind powder mixture poor fluidity and uneven wind powder air-flow the problems such as, better meet on-the-spot test and want
It asks.
In conclusion the advantageous effect of the embodiment of the present invention is：
By traditional coal pulverizer outlet portal and drag regulator " two-in-one ", rapid closing can be met and adjust pulverized coal channel
Resistance reduces the equipment installed on pulverized coal feed pipe, mitigates repair and maintenance workload；
After pulverized coal preparation system coal pulverizer outlet rapid closing device using the present invention, pulverized coal feed pipe reduces by one group of installing component,
It is installed on pulverized coal feed pipe for wind speed measuring device and position that is more preferable, more meeting code requirement is provided creates conditions, and then effectively
Solve the wind powder mixture poor fluidity and wind that most power plant pulverized coal preparation system pulverized coal channel is too short and installation space is insufficient and brings
The problems such as powder air-flow is uneven better meets on-the-spot test requirement.
New device uses pneumatic control mode, has both coal pulverizer outlet rapid closing device and resistance regulation function, and energy
Remote operation makes it possible that pulverized coal feed pipe resistance random groups operation state is adjusted, and the control for improving drag regulator is flexible
Property, it accurately controls and creates conditions for the dynamic of each angle coal dust speed of combustion process, concentration etc.；
Using multiple-blade baffle forms, each blade synchronization adjustment avoids traditional two-piece type shrinkage cavity (shown in Fig. 1) resistance regulation
Not linear, non-uniform problem, and then improve breeze airflow in pulverized coal channel and flowed afterwards by drag regulator (shrinkage cavity)
Uniformity is conducive to promote coal powder density, and the representativeness and accuracy of breeze airflow sampling improve the accuracy of measuring wind speed；
There is sealing air of the sealing air as the present apparatus using cold First air or enchashment, accesses annular sealing air pipe, effectively solve
Certainly traditional shrinkage cavity accumulated powder blockage problem, lifting device reliability；After avoiding traditional coal pulverizer outlet rapid closing device to block simultaneously
Close the slow or close problem that is not closed completely.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above example
Explanation be merely used to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (10)
1. a kind of coal pulverizer exports rapid closing device, which is characterized in that the coal pulverizer exports rapid closing device and includes：
Rectangle sealed box body, the rectangle sealed box body are welded on by two bottom surfaces between two sections of pulverized coal feed pipes；
Two the first sealing plates are arranged on two opposite sides of the rectangle sealed box body；
Baffle mechanism by multiple baffles and drives multiple shafts of flapper to constitute, and parallel fixation is distinguished at multiple shaft both ends
On other two opposite side of the rectangle sealed box body, and first sealing plate with the shaft same
In a plane；Along rotor shaft direction, one side of the upper bottom surface of each baffle is respectively provided with a L-shaped notch with the opposite side of bottom surface,
So that when the shutters are closed, the notch between adjacent screen cooperates, and the notch of outermost side shield one and described the
One sealing plate cooperates；
Transmission mechanism is separately connected with multiple shafts；
Driving device connects the transmission mechanism, for driving the transmission mechanism；
Ring packing air hose, is sleeved on the rectangle sealed box body lateral surface, and the lateral surface of the ring packing air hose is provided with
The medial surface of sealing air access port, the ring packing air hose is provided with multiple sealing wind inlets, and the sealing wind inlet will be close
Envelope wind is introduced into the rectangle sealed box body；Two the first sealing plates, baffle mechanism and transmission mechanism are arranged at the length
Quad seal tray interior.
2. coal pulverizer according to claim 1 exports rapid closing device, which is characterized in that the coal pulverizer outlet speed is closed
Door gear further includes：
Multipair second sealing plate is arranged on two opposite sides of the fixation shaft, and exists with multiple shafts
In same plane, the discrete both sides in a shaft wherein one end of each pair of second sealing plate so that when the shutters are closed, Mei Dui
Two sealing plates coordinate with the notch on baffle both sides respectively.
3. coal pulverizer according to claim 1 exports rapid closing device, which is characterized in that the driving device is pneumatic
Or Vidacare corp.
4. coal pulverizer according to claim 1 exports rapid closing device, which is characterized in that the number of the baffle mechanism is
5.
5. coal pulverizer according to claim 1 exports rapid closing device, which is characterized in that the rectangle sealed box body is
Metal case.
6. a kind of mill coal pulverizer system, which is characterized in that the pulverized coal preparation system includes：Coal pulverizer is connected to the coal-grinding
The a plurality of pulverized coal channel of machine is arranged the wind speed measuring device on every pulverized coal channel and is arranged in every coal pipe
Coal pulverizer as described in claim 1 on road exports rapid closing device.
7. pulverized coal preparation system according to claim 6, which is characterized in that the coal pulverizer outlet rapid closing device also wraps
It includes：
Multipair second sealing plate is arranged on two opposite sides of the fixation shaft, and exists with multiple shafts
In same plane, the discrete both sides in a shaft wherein one end of each pair of second sealing plate so that when the shutters are closed, Mei Dui
Two sealing plates coordinate with the notch on baffle both sides respectively.
8. pulverized coal preparation system according to claim 6, which is characterized in that the driving device is that pneumatically or electrically driving fills
It sets.
9. pulverized coal preparation system according to claim 6, which is characterized in that the number of the baffle mechanism is 5.
10. pulverized coal preparation system according to claim 6, which is characterized in that the rectangle sealed box body is metal case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707678.3A CN105698206B (en) | 2014-11-28 | 2014-11-28 | Coal pulverizer exports rapid closing device and mill coal pulverizer system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707678.3A CN105698206B (en) | 2014-11-28 | 2014-11-28 | Coal pulverizer exports rapid closing device and mill coal pulverizer system |
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| CN105698206A CN105698206A (en) | 2016-06-22 |
| CN105698206B true CN105698206B (en) | 2018-09-07 |
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| CN108958304A (en) * | 2018-08-10 | 2018-12-07 | 国网山东省电力公司电力科学研究院 | A kind of First air leveling system and leveling method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663827Y (en) * | 2003-09-03 | 2004-12-15 | 贾朝群 | A pulverized coal dispenser |
| CN101907300A (en) * | 2010-08-19 | 2010-12-08 | 上海上电电力工程有限公司 | Enclosed air system of medium speed mill in heat-engine plant |
| CN204268500U (en) * | 2014-11-28 | 2015-04-15 | 国家电网公司 | Coal pulverizer outlet rapid closing device and mill coal pulverizer system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2777476B1 (en) * | 1998-04-16 | 2000-06-23 | Alsthom Gec | COMBUSTIBLE PARTICLE SEPARATOR PROVIDED UPSTREAM OF A BOILER AND INCLUDING A SINGLE ISOLATION VALVE |
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2014
- 2014-11-28 CN CN201410707678.3A patent/CN105698206B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663827Y (en) * | 2003-09-03 | 2004-12-15 | 贾朝群 | A pulverized coal dispenser |
| CN101907300A (en) * | 2010-08-19 | 2010-12-08 | 上海上电电力工程有限公司 | Enclosed air system of medium speed mill in heat-engine plant |
| CN204268500U (en) * | 2014-11-28 | 2015-04-15 | 国家电网公司 | Coal pulverizer outlet rapid closing device and mill coal pulverizer system |
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| CN105698206A (en) | 2016-06-22 |
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