CN107906556A - A kind of fine coal distributor balance control method and equalising control device - Google Patents
A kind of fine coal distributor balance control method and equalising control device Download PDFInfo
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- CN107906556A CN107906556A CN201711081635.9A CN201711081635A CN107906556A CN 107906556 A CN107906556 A CN 107906556A CN 201711081635 A CN201711081635 A CN 201711081635A CN 107906556 A CN107906556 A CN 107906556A
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- valve
- paddle board
- coal
- discharge pipe
- air discharge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
Abstract
The invention discloses a kind of fine coal distributor balance control method, the balance control method in the side inner wall of fine coal distributor by being uniformly arranged multiple paddle board valves, each paddle board valve is located at the nearly arrival end of fine coal distributor, and each First air discharge pipe set with top corresponds；By rotation oar plate valve valve plate, the valve plate of paddle board valve and the angle of vertical direction are adjusted, adjusts the coal powder density for entering the corresponding First air discharge pipe in top and downstream First air discharge pipe.The present invention utilizes paddle board valve, pass through the coal powder density for adjusting the coal dust movement locus of First air discharge tube inlet front end to change into each First air coal pipe, simultaneously because the nearly fine coal distributor arrival end of paddle board valve, fetch is grown, the air quantity into each First air coal pipe is not influenced, so as to achieve the purpose that only to adjust coal powder density in First air discharge pipe.
Description
Technical field
The invention belongs to coal-burning boiler control technology field, and in particular to boiler First air fine coal distribution regulator structure and
Its method to concentration of pulverized coal adjustment control.
Background technology
For coal-burning boiler, each First air discharge manage-style coal powder distribation equilibrium of same coal pulverizer is transported for boiler
Capable security, economy and the feature of environmental protection has material impact.First air coal powder distribation inequality can occur furnace flame center
Offset, the slagging of burner hearth regional area and hearth combustion region combustion pulsation, this can not only cause combustion instability, it is also possible to cause
Superheater over temperature booster.Wind coal powder distribution inequality not only reduces the efficiency of combustion of boiler, and adds NOxGrowing amount, is
The problem of power plant safety and energy-saving and emission-reduction urgent need to resolve.
For the coal pulverizer of unit pulverized-coal system, since the air quantity for the vane surrounding for blowing afloat coal dust is uneven, once
It is non-uniform that wind and coal dust, which reach the temperature of dynamic and static separator surrounding and concentration, this will cause First air and coal dust to reach
There are air quantity, temperature and coal powder density in circumferential concentration deviation in the fine coal distributor of First air outlet-pipe inlet, air quantity and
The skewness that is uneven and can further influencing coal dust of temperature, so the coal powder density into each First air coal pipe exists
Very big difference.
For tangentially-fired boiler, four burners are located on four angles of boiler respectively, the length of powder feeding pipes
Situations such as with elbow quantity, is different, so that the resistance of ducting for causing each First air coal pipe is different, this necessarily causes
The distribution of wind powder it is uneven.At present, First air coal pipe resistance regulation lacks flexibly and effectively device.Most of power plant use
The method of cold conditions leveling solves the problems, such as this, i.e.,：Adjustable contraction is installed in each First air pulverized coal channel（Such as set in wind pipeline
The related construction package such as adjustable valve, plate is put to be adjusted）, by adjusting each adjustable contracting in the case of the cold conditions of pure wind flow
The opening diameter size in hole adjusts the resistance of each First air pulverized coal channel, so that the air quantity of each First air coal pipe is equal.
However, air quantity is equal between traditional adjustable contraction can only ensure each First air coal pipe（Coal dust amount not necessarily phase
Deng）, or coal dust amount is equal（Air quantity is not necessarily equal）, it is primarily present problems with：
1. pure air has reached resistance equilibrium, do not ensure that and reach resistance equilibrium in the case of defeated powder to coal dust yet.
Conventional tunable shrinkage cavity opening diameter is determined in the case of pure wind flow, since adjustable contraction is to wind and coal dust
Resistance difference, the coal powder density after being run with powder between each First air coal pipe is there may be notable difference, to boiler safety, warp
Ji operation brings adverse effect.
2. after band powder operation, the adjustment of adjustable contraction influences whether each First air coal pipe air velocity duct.
The adjustable contraction of power plant is generally after cold conditions mixes up, the wind speed deviation of each First air coal pipe when ensureing to run with powder
No longer adjusted after allowed band.Because pipeline flow area will be changed by adjusting adjustable contraction, it will influence to circulate at the same time
Air quantity and coal dust amount.For there is each First air coal dust pipeline of coal dust deviation, it is inclined that coal powder density is reduced by adjustable contraction
The circulation area of high First air coal pipe, can reduce the pulverized coal flow of the pipe, but this will cause the air velocity duct less than normal, even
Cause coal dust to be accumulated, cause plugging.
3. after band powder operation, adjustable contraction possibly can not be adjusted flexibly.
Due to for a long time with powder operation coal dust will be full of between the gap for causing adjustable contraction, cause it is stuck, it is difficult to manually
Carry out the adjustment of adjustable contraction circulation pore size.
The content of the invention
The purpose of the present invention is to solve defect existing in the prior art, there is provided one kind can adjust First air coal dust
The inlet coal powder density distribution of outlet, and do not increasing pressure drag and do not changing the premise of each First air discharge manage-style speed
Under, the coal powder density of balanced each First air discharge pipe, makes concentration deviation maintain in allowed limits.
In order to achieve the above object, the present invention provides a kind of fine coal distributor balance control method, the Balance route side
For method by being uniformly arranged multiple paddle board valves in the side inner wall of fine coal distributor, each paddle board valve is located at the nearly arrival end of fine coal distributor
Place, and each First air discharge pipe set with top corresponds；Pass through rotation oar plate valve valve plate, the valve of adjusting paddle board valve
The angle of plate and vertical direction, adjusts corresponding First air discharge pipe and downstream First air discharge pipe above entering
Coal powder density.
Wherein, each First air discharge pipe, it is along coal dust direction of rotation（Can be clockwise direction according to design,
Can also be counterclockwise）Next adjacent First air discharge pipe is its corresponding downstream First air discharge pipe,
Conversely, an adjacent First air discharge pipe is its corresponding upstream First air discharge pipe thereon.
The valve shaft of paddle board valve and institute corresponding First air discharge pipe axle center and fine coal distributor axle center in the horizontal plane
Included angle A between line is 5-45 °；Balance control method of the present invention specifically includes following steps：
（1）Adjust the initialization angle of each paddle board valve valve plate：Each paddle board valve valve plate is adjusted, it is distributed with fine coal into fine coal
The movement locus of device is parallel, and the angle of each paddle board valve valve plate and vertical direction is the initialization angle B at this time0；
The initialization angle B0Calculated and obtained by the following formula：
B0=arctan(vIt is horizontal/vVertically)；
In formula：B0For valve plate initialization angle；vIt is horizontalFor the peripheral speed of First air coal dust horizontal plane where paddle board valve valve shaft
Degree；vVerticallyFor the speed of First air coal dust straight up.
（2）Coal powder density in each First air discharge pipe is monitored in real time：Measure in real time in each First air discharge pipe
Coal powder density, respectively by concentration peak, concentration minimum compared with mean concentration, if absolute deviation is respectively less than
The threshold value of setting, then continue to monitor fine coal real-time concentration in each First air discharge pipe；If a certain absolute deviation be more than or
Equal to the threshold value of setting, step is carried out（3）；The threshold range set is 8-15%.
（3）Adjust the coal powder density in First air discharge pipe：According to step（2）The absolute deviation of calculating, determines tool
Have with the absolute deviation of the mean concentration not less than the concentration peak of given threshold or the First air of concentration minimum
Discharge pipe, checks that it is corresponded in paddle board valve operating angle B values, when operating angle B is judged in adjustable range, adjusts it
The angle of corresponding paddle board valve valve plate；When operating angle B reaches the maximum or minimum limit value of adjustable range, its upstream is adjusted
Paddle board valve valve plate angle；Then, return to step（2）The real-time of coal powder density in each First air discharge pipe is carried out again
Measure.
Wherein, the angle regulation method of paddle board valve valve plate is as follows：When coal powder density peak and the mean concentration ratio
Compared with absolute deviation be not less than given threshold when, increase with the coal powder density peak First air discharge pipe it is corresponding
The operating angle of paddle board valve valve plate；When absolute deviation of the coal powder density minimum compared with the mean concentration is not less than setting
During threshold value, reduce the operating angle of the corresponding paddle board valve valve plate of First air discharge pipe with the coal powder density minimum；
The each rotation angle of paddle board valve valve plate is 2-10 °, and the operating angle B adjustable ranges of paddle board valve valve plate are B0To 80 °.
When carrying out paddle board valve valve plate angular adjustment, when the operating angle B of paddle board valve is reduced to B0Or 80 ° are increased to, it is
Reach adjusting extreme value, the coal powder density value of its corresponding First air discharge pipe and the coal dust of all First air discharge pipes
When the absolute deviation of mean concentration is still greater than or equal to given threshold, according to its upstream First air coal dust of opposite rule adjustment
The angle of the corresponding paddle board valve valve plate of outlet.I.e.：When adjusting paddle board valve reaches adjusting extreme value, its corresponding First air coal dust goes out
Mouthful coal powder density value of pipe and the absolute deviation of average value are still greater than equal to given threshold, when the corresponding First air coal of the paddle board valve
When the coal powder density of powder outlet is still peak, reduce the work of its corresponding paddle board valve valve plate of upstream First air discharge pipe
Make angle, when adjusting, the operating angle minimum limit value of reduction is equal to B0 for B；When the corresponding First air coal dust of the paddle board valve
When the coal powder density of outlet is still minimum, increase the work of its corresponding paddle board valve valve plate of upstream First air discharge pipe
Angle, when adjusting, increase operating angle maximum limit is equal to 80 ° for B.
System is continued to monitor and adjusted according to above-mentioned steps, it can be ensured that the Balance route of fine coal distributor wind coal dust, or
Person reaches the maximum magnitude that paddle board valve can optimize.
Present invention also offers a kind of fine coal distributor equalising control device, which is equipped with four and four
Uniformly distributed First air discharge pipe more than a, fine coal distributor center are equipped with the coal spout of perforation, are connected down by coal spout
The coal pulverizer at end；Wherein, the inner wall of fine coal distributor is uniformly arranged identical with the quantity of First air discharge pipe along side
Paddle board valve, each paddle board valve is located at the nearly arrival end of fine coal distributor, including bearing rotary construction package, base, seal member, valve
Axis, valve plate；Base is fixed at the lateral wall of fine coal distributor；Valve shaft and valve plate are located at fine coal inner skeleton；Fine coal distributes
It is equipped with outside device and passes through the bearing rotary knot with each one-to-one electric operator of paddle board valve, the electric operator
Structure component is fixed on the base；Valve plate is fixedly linked with valve shaft one end, and the valve shaft other end passes through bearing rotary structure group
Part is connected with the output terminal of electric operator；Valve shaft is equipped with seal member with bearing rotary construction package junction；Paddle board valve
Valve shaft with the included angle A between corresponding First air discharge pipe axle center and fine coal distributor axial connecting line in the horizontal plane
For 5-45 °.
Wherein, sealed between bearing rotary construction package and base by O-ring, valve shaft and bearing rotary construction package it
Between the seal member that sets using existing conventional movable sealing structure, dynamic sealing is realized by filler and dust-proof seal ring.
Valve plate design is round rectangle, long waist shaped, trapezoidal or oval.
Valve plate and valve shaft use abrasion-resistant stee, and surface is equipped with erosion resistant ceramic coating.
The distance of valve shaft to fine coal distributor arrival end is greater than or equal to the half of valve plate width.Do not influencing the feelings of installation
Under condition, as close to arrival end.
The present invention has the following advantages compared with prior art：
1) traditional adjustable contraction adjusts the fine coal flow in First air discharge pipe, is realized by varying circulation area
, this will adjust air quantity and coal amount at the same time, that is to say, that the air and fine coal mass ratio in First air coal pipe are almost unchanged；
And the paddle board shape coal powder density regulating valve that the present invention realizes（That is paddle board valve）By adjusting First air discharge tube inlet front end
Coal dust movement locus change the coal powder density into each First air coal pipe, simultaneously because the nearly fine coal distributor of paddle board valve enters
Mouth end, fetch length, does not influence the air quantity into each First air coal pipe, is only adjusted so as to reach in First air discharge pipe
The purpose of coal powder density.
2) regulation scheme that market uses is installed in First air pulverized coal channel, since coal dust comes into pipeline, not
Other pipelines, effect unobvious can be entered because of adjusting；And the present invention is adjusted before First air discharge pipe is entered
Section, can effectively adjust redistributing for the fine coal adjacent to First air discharge pipe.
3) the paddle board shape coal powder density regulating valve that the present invention realizes does not influence to enter the wind in each First air coal dust pipeline
Speed, will not cause the wind speed deviation of each First air coal dust pipeline.
4) the paddle board shape coal powder density regulating valve that the present invention realizes uses rotary motion, straight compared to traditional adjustable contraction
Line moves, and sealing is relatively reliable, and will not produce the bite caused by coal dust is accumulated, situations such as can not acting.
5) present invention uses closed-loop control, the coal in each First air discharge pipe measured by coal powder density sensor
Powder concentration is adjusted, and the degree of automation is high, and stationarity is good.
6) the paddle board shape coal powder density regulating valve that the present invention realizes is laid out in fine coal distributor by the way of integral installation
It is interior, it is different in each First air fine coal pipe from installing in the prior art, it is reasonable with positional structure, easy to in-site installation and follow-up dimension
Shield, reduces maintenance cost.
7) paddle board valve of the present invention and wind fine coal contact surface have used erosion resistance tungsten-carbide cermet as surface protecting layer,
Good with abrasion-resistance, the service life is high.
Brief description of the drawings
Fig. 1 is the structure diagram of fine coal distributor equalising control device of the present invention；
Fig. 2 is the top view of fine coal distributor equalising control device in Fig. 1；
Fig. 3 is the structure diagram of paddle board valve in Fig. 1；
Fig. 4 is the structure diagram of seal member in Fig. 3；
Fig. 5 is that fine coal movement locus when valve plate is in initialization angle in fine coal distributor equalising control device of the present invention shows
It is intended to；
Fig. 6 is to rotate clockwise fine coal movement locus schematic diagram after valve plate；
Fig. 7 is the flow chart of fine coal distributor balance control method of the present invention.
In figure, 1- paddle boards valve, 2- electric operators, 3- fine coal distributor, 4,401,402,403,404- First air coals
Powder outlet, 5- coal spouts, 1.1- valve plates, 1.2- valve shafts, 1.3- seal members, 1.3.1 airtight and watertight paddings, 1.3.2 dust seals
Circle, 1.4- bases, 1.5- bearing rotary construction packages.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, a kind of fine coal distributor equalising control device of the present invention is arranged on fine coal distributor 3,
3 upper end of fine coal distributor includes 4 First air discharge pipes 4（The quantity of the First air discharge pipe can be as needed
Adjustment）, center be equipped with coal spout 5, also assemble four paddle board valves 1 and the electronic execution being connected with paddle board valve on fine coal distributor 3
Mechanism 2, wherein, 4 paddle board valves 1, which are fixed, to be distributed on 3 weeks side walls of fine coal distributor, under First air discharge pipe 4
Side and the wind fine coal arrival end of neighbouring fine coal distributor 3,1 center line of paddle board valve and corresponding 4 center of First air discharge pipe
The horizontal sextant angle A formed with the line at 3 center of fine coal distributor, is 5-45 °（As shown in Figure 2）, 1 center line of paddle board valve（That is valve
Axis 1.2）Distance L1 to the wind fine coal arrival end of fine coal distributor 3 is more than or equal to 1.1 valve blade width L half of valve plate.
As shown in figure 3, the paddle board valve includes valve plate 1.1, valve shaft 1.2, seal member 1.3, base 1.4 and bearing rotary knot
Structure component 1.5；Wherein, seal member 1.3, bearing rotary construction package 1.5 are assemblied on base 1.4,1.2 one end of valve shaft and valve
Plate 1.1 is fixedly connected, and is formed as one by being fixedly welded on, and the other end passes through bearing rotary construction package 1.5 and outside
Electric operator 2 connect.As shown in figure 4, seal member 1.3 is cyclic structure, it is placed on valve shaft 1.2, and one end and axis
Hold rotational structure component to be fixedly linked, inner ring is equipped with two annular recess, interior respectively to set airtight and watertight padding 1.3.1 and dust-proof seal ring
1.3.2, valve shaft 1.2 is realized dynamic close with bearing rotary construction package 1.5 by airtight and watertight padding 1.3.1 and dust-proof seal ring 1.3.2
Envelope.Bearing rotary construction package 1.5 is assemblied on base 1.4 at the same time realizes static seal by O-ring, and base 1.4 is then by tight
Real weld seam, which is welded and fixed, to be installed on 3 weeks side walls of fine coal distributor, to ensure the overall sealing of fine coal distributor 3.To meet
In the operating angle requirement of paddle board valve, 0-90 ° of the rotation angle range of the valve plate 1.1 of paddle board valve 1；Valve plate design is rounded square
Shape, long waist shaped, trapezoidal or oval, length is with do not influence should try one's best on the premise of valve plate installation is safeguarded diminution and coal spout
Spacing L2（As shown in Figure 1）, to increase adjusting face.In addition, valve plate 1.1 and valve shaft 1.2 are made by abrasion-resistant stee, there is resistance to punching on surface
The ceramic coating of erosion, has very high erosive wear resistance, to increase the working life of spool.
As shown in fig. 7, fine coal distributor balance control method of the present invention, comprises the following steps（Following steps are existed with fine coal
Exemplified by being rotated clockwise in fine coal distributor）:
Step 1：Each paddle board valve valve plate is adjusted to initialization angle, and valve plate initialization angle enters the fortune of distributor for fine coal
The equal line direction of dynamic rail mark；Wherein：The valve plate initialization angle is calculated by the following formula and obtained：
B0=arctan(vIt is horizontal/vVertically)
In formula：B0For valve plate initialization angle, paddle board valve valve plate is set using vertical direction angle as 0 °, B0As rotation clockwise
The initial angle turned；vIt is horizontalFor the peripheral velocity of First air coal dust horizontal plane where paddle board valve shaft；vVerticallyFor First air coal dust
Speed straight up； vIt is horizontal、vVerticallyCalculated according to electric power factory equipment parameter and obtain or measure collection.
As shown in figure 5, angle B current state is just B0, the corresponding paddle board valve 1.1 is First air discharge pipe 401.
Fine coal distributor 3 is mixed into from the fine coal and First air of coal pulverizer output, fine coal running orbit is that spiral state is presented,
Then, into each First air discharge pipe of distributor upper end, valve plate initialization angle is adjusted to and fine coal runs rail
Mark is basically identical, can reduce windage and tentatively ensure the equilibrium of inner skeleton.
Step 2：Coal powder density in each First air discharge pipe 4 of system acquisition, by concentration peak, minimum with
Each pipe coal powder density average value is compared, if absolute deviation is respectively less than the threshold value set, this step of systems stay carries out each
The coal powder density of pipe is gathered compared with；If absolute deviation has the threshold value more than or equal to setting, into next step, the threshold
Value setting range is 8-15%；
Step 3：Coal powder density in system adjustment First air discharge pipe.System is minimum according to concentration high value or concentration
The First air discharge pipe of value, checks its corresponding paddle board valve operating angle angle value, when operating angle B is judged in adjustable range
When, adjust the angle of its corresponding paddle board valve valve plate；When operating angle B reaches the maximum or minimum limit value of adjustable range,
Adjust the angle of the paddle board valve valve plate of its upstream；Then, return to step two carries out coal dust in each First air discharge pipe again
The real time measure of concentration.
In step 3, if the absolute deviation compared concentration high value is more than or equal to the threshold value of setting, and its is right
For the paddle board valve operating angle B values answered in adjustable range, system will automatically adjust the First air discharge pipe of concentration high value
Corresponding paddle board valve, concentration is reduced by increasing operating angle；If the absolute deviation compared concentration lower value is more than
Equal to the threshold value of setting, system will automatically adjust the corresponding paddle board valve of First air discharge pipe of concentration lower value, by subtracting
Lack operating angle to increase concentration；But while with adjusting operating angle, downstream in neighbouring First air discharge pipe
Concentration can in contrast do and decrease or increase accordingly, then, repeat step two, step 3, system repeatedly are adjusted, you can will
In the suitable scope of the concentration control of air hose.
It is specially the schematic diagram of angle B increase as shown in fig. 6, being the schematic diagram of coal dust movement locus when valve plate is adjusted, from
Understood in figure, rotate clockwise valve plate and adjust and will reduce the air hose of top（I.e. corresponding First air discharge pipe 401）Coal
Powder concentration, but the top air hose in downstream can be increased（That is downstream First air discharge pipe 402）Coal powder density；Conversely, the inverse time
Pin rotary valve plate, angle B are reduced, and will increase the air hose of top（I.e. corresponding First air discharge pipe 401）Coal powder density,
But the top air hose in downstream can be reduced（That is downstream First air discharge pipe 402）Coal powder density.In the process, adjacent one
First air discharge pipe beyond secondary wind discharge pipe（That is First air discharge pipe 404,403）Pulverized coal flow from
Influence, illustrate the coal powder density regulating effect of the present invention has good goal directness at the same time.The rotation tune of each paddle board valve
It is 2-10 ° to save angle, and the operating angle B adjustable ranges of paddle board valve valve plate are B0 to 80 °, is to reach extreme value when B=B0 or 80 °
When, it should under a kind of processing of situation.
In step 3, when inspection paddle board valve regulation operating angle B is reduced to B0Or 80 ° are increased to, as reach adjusting
Extreme value, the coal powder density value of its corresponding First air discharge pipe and the coal powder density of all First air discharge pipes are averaged
When the absolute deviation of value is still greater than or equal to given threshold, according to its upstream First air discharge pipe pair of opposite rule adjustment
The angle for the paddle board valve valve plate answered, with reference to Fig. 6, it is assumed that 401 corresponding paddle board valve angle of First air discharge pipe adjusts extreme value,
Its First air discharge pipe 404 should be adjusted（As upstream First air discharge pipe）Corresponding paddle board valve valve plate.Specifically
For：When paddle board valve regulation is to when adjusting extreme value, the coal powder density of the corresponding First air discharge pipe 401 of the paddle board valve is still for most
During high level, its upstream First air discharge pipe is rotated counterclockwise（That is First air discharge pipe 404）Corresponding paddle board valve valve
Plate, that is, reduce the operating angle B values of the paddle board valve valve plate, and when adjusting, the operating angle minimum limit value of reduction is equal to for B
B0；When paddle board valve regulation is to when adjusting extreme value, the coal powder density of the corresponding First air discharge pipe 401 of the paddle board valve is minimum
During value, hour hands clockwise rotate its upstream First air discharge pipe（That is First air discharge pipe 404）Corresponding paddle board valve
Valve plate, that is, increase the operating angle B values of the paddle board valve valve plate, and when adjusting, increase operating angle maximum limit is equal to for B
80°。
System is continued to monitor and adjusted according to above-mentioned steps, it can be ensured that the Balance route of fine coal distributor wind coal dust, or
Person reaches the maximum magnitude that paddle board valve can optimize.Under special circumstances, it is possible that the paddle board valve that system should be adjusted all reaches
To the situation of limiting value, this should not be the problem of the system can be adjusted, and should check the operating mode of the preceding working procedure of fine coal distributor,
At this time, system only feeds back corresponding paddle board valve and has reached accommodation limit, and maintains current adjustment state.
Embodiments of the present invention are described in detail above in conjunction with attached drawing, but the invention is not limited in above-mentioned
Embodiment.Such as：In the present solution, when if paddle board width is smaller and level angle A is larger, paddle board is adjusted to the wind above it
Pipe concentration influences to decrease, and mainly influence be downstream air hose concentration, under this situation, take adjusting to exceed threshold value
The corresponding upstream paddle board valve of First air discharge pipe is adjusted to realize equilibrium, and regulating step and method are basically unchanged.Also
Have, the paddle board valve of more than one wind discharge pipe quantity is set, to be adjusted to this programme.Therefore, in this area
It is that appropriate adjustment and change can be made to it in the knowledge that those of ordinary skill possesses, its function and realization are former
Reason and mechanical structure similar in this example, these should all be regarded as in range defined by claims of the present invention and be protected.
Claims (10)
- A kind of 1. fine coal distributor balance control method, it is characterised in that：The balance control method passes through in fine coal distributor Side inner wall is uniformly arranged multiple paddle board valves, and each paddle board valve is located at the nearly arrival end of fine coal distributor, and each with top setting First air discharge pipe corresponds；By rotation oar plate valve valve plate, the valve plate of paddle board valve and the angle of vertical direction are adjusted, Adjust the coal powder density for entering the corresponding First air discharge pipe in top and downstream First air discharge pipe.
- 2. fine coal distributor balance control method according to claim 1, it is characterised in that：Each First air discharge Pipe, along coal dust, the next adjacent First air discharge pipe in the direction of rotation in fine coal distributor is its corresponding downstream one for it Secondary wind discharge pipe, conversely, an adjacent First air discharge pipe is its corresponding upstream First air discharge thereon Pipe.
- 3. fine coal distributor balance control method according to claim 1 or 2, it is characterised in that：The valve of the paddle board valve Included angle A between axis First air discharge pipe axle center corresponding with the horizontal plane of place and fine coal distributor axial connecting line is 5-45°；The balance control method comprises the following steps：（1）Adjust the initialization angle of each paddle board valve valve plate：Each paddle board valve valve plate is adjusted, it is distributed with fine coal into fine coal The movement locus of device is parallel, and the angle of each paddle board valve valve plate and vertical direction is the initialization angle B at this time0；（2）Coal powder density in each First air discharge pipe is monitored in real time：The coal in each First air discharge pipe is measured in real time Powder concentration, respectively by concentration peak, concentration minimum compared with mean concentration, sets if absolute deviation is respectively less than Threshold value, then continue to monitor fine coal real-time concentration in each First air discharge pipe；If a certain absolute deviation is greater than or equal to The threshold value of setting, carries out step（3）；（3）Adjust the coal powder density in First air discharge pipe：According to step（2）The absolute deviation of calculating, determine have with The absolute deviation of the mean concentration is not less than the concentration peak of given threshold or the First air coal dust of concentration minimum Outlet, checks the operating angle B of its corresponding paddle board valve valve plate：When operating angle B is in adjustable range, the paddle board is adjusted The operating angle B of valve valve plate；When operating angle B reaches the maximum or minimum limit value of adjustable range, its upstream is adjusted once The operating angle of the corresponding paddle board valve valve plate of wind discharge pipe；After the completion of the adjustment of paddle board valve valve plate operating angle, step is returned Suddenly（2）The real time measure of coal powder density in each First air discharge pipe is carried out again；The operating angle B of the paddle board valve valve plate Adjustable range be B0To 80 °.
- 4. fine coal distributor balance control method according to claim 3, it is characterised in that：The step（3）Middle paddle board The angle regulation method of valve valve plate is as follows：When absolute deviation of the coal powder density peak compared with the mean concentration be more than etc. When given threshold, the work of First air discharge pipe corresponding paddle board valve valve plate of the increase with the coal powder density peak Angle；When absolute deviation of the coal powder density minimum compared with the mean concentration is more than or equal to given threshold, reduce tool There is the operating angle of the corresponding paddle board valve valve plate of First air discharge pipe of the coal powder density minimum.
- 5. fine coal distributor balance control method according to claim 4, it is characterised in that：The step（3）Middle progress The method of the corresponding paddle board valve valve plate operating angle adjustment of upstream First air discharge pipe is as follows：When compared with mean concentration Absolute deviation be more than or equal to given threshold concentration value be coal powder density minimum, and have the coal powder density minimum one When the operating angle of the corresponding paddle board valve valve plate of secondary wind discharge pipe reaches the maximum or minimum limit value of adjustable range, increase The operating angle of its corresponding paddle board valve valve plate of upstream First air discharge pipe；When the absolute deviation compared with mean concentration Concentration value more than or equal to given threshold is coal powder density peak, and the First air coal dust with the coal powder density peak goes out When the operating angle that mouth manages corresponding paddle board valve valve plate reaches the maximum or minimum limit value of adjustable range, reduce its upstream once The operating angle of the corresponding paddle board valve valve plate of wind discharge pipe.
- 6. fine coal distributor balance control method according to claim 5, it is characterised in that：When progress upstream First air coal The corresponding paddle board valve valve plate operating angle adjustment of powder outlet, the operating angle reach the maximum or minimum limit value of adjustable range When, the corresponding paddle board valve of system feedback has reached accommodation limit, maintains current adjustment state.
- 7. according to any fine coal distributor balance control method of claim 3 to 6, it is characterised in that：The step（3） The adjusting angle for increasing or reducing every time during middle paddle board valve valve plate angular adjustment is 2-10 °.
- 8. according to any fine coal distributor balance control method of claim 3 to 6, it is characterised in that：The paddle board valve The initialization angle of valve plateB0Calculated and obtained by the following formula：B0=arctan(vIt is horizontal/vVertically)；In formula：B0For valve plate initialization angle；vIt is horizontalFor the peripheral speed of First air coal dust horizontal plane where paddle board valve valve shaft Degree；vVerticallyFor the speed of First air coal dust straight up.
- 9. according to any fine coal distributor balance control method of claim 3 to 6, it is characterised in that：The step（2） The middle threshold value set is 8-15%.
- 10. a kind of fine coal distributor equalising control device, the fine coal distributor upper end is uniformly distributed equipped with four and more than four First air discharge pipe, fine coal distributor center are equipped with the coal spout of perforation, and the coal pulverizer of lower end is connected by coal spout；Its It is characterized in that：The inner wall of the fine coal distributor is uniformly arranged the paddle board identical with the quantity of First air discharge pipe along side Valve, each paddle board valve are located at the nearly arrival end of fine coal distributor, including bearing rotary construction package, base, seal member, valve shaft, Valve plate；The base is fixed at the lateral wall of the fine coal distributor；The valve shaft and valve plate are located at the fine coal distributor It is internal；The fine coal dispenser exterior is equipped with and each one-to-one electric operator of paddle board valve, the electric operator It is fixed at by the bearing rotary construction package on the base；The valve plate is fixedly linked with valve shaft one end, and valve shaft is another One end is connected by bearing rotary construction package with the output terminal of electric operator；The valve shaft and bearing rotary construction package Junction is equipped with the seal member；The valve shaft of the paddle board valve and institute's corresponding First air discharge pipe axis in the horizontal plane Included angle A between the heart and fine coal distributor axial connecting line is 5-45 °.
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| CN201711081635.9A CN107906556B (en) | 2017-11-07 | 2017-11-07 | A kind of fine coal distributor balance control method and equalising control device |
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| CN201711081635.9A CN107906556B (en) | 2017-11-07 | 2017-11-07 | A kind of fine coal distributor balance control method and equalising control device |
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| CN107906556B CN107906556B (en) | 2019-04-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815350A (en) * | 2019-11-15 | 2021-05-18 | 北京格林奔科能源科技有限公司 | Adjustable air-powder uniform distributor with uniformly distributed cross section after self-diversion flow state disturbance |
| WO2022021511A1 (en) * | 2020-07-30 | 2022-02-03 | 李伟 | Online pulverized-coal concentration regulator and method therefor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1890082A2 (en) * | 2006-08-15 | 2008-02-20 | General Electric Company | Port-installed damper |
| ATE467802T1 (en) * | 2006-08-03 | 2010-05-15 | Inter Control Koehler Hermann | GAS VALVE AND METHOD FOR CONTROLLING A GAS VALVE |
| EP2500647A2 (en) * | 2011-03-16 | 2012-09-19 | Babcock Power Services Inc. | Coal flow splitters and distributor devices |
| CN105003665A (en) * | 2015-08-14 | 2015-10-28 | 北京华清茵蓝科技有限公司 | Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves |
| CN106765275A (en) * | 2017-03-14 | 2017-05-31 | 江苏中能电力设备有限公司 | A kind of adjustable type differential pulverized coal distributor |
-
2017
- 2017-11-07 CN CN201711081635.9A patent/CN107906556B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE467802T1 (en) * | 2006-08-03 | 2010-05-15 | Inter Control Koehler Hermann | GAS VALVE AND METHOD FOR CONTROLLING A GAS VALVE |
| EP1890082A2 (en) * | 2006-08-15 | 2008-02-20 | General Electric Company | Port-installed damper |
| EP2500647A2 (en) * | 2011-03-16 | 2012-09-19 | Babcock Power Services Inc. | Coal flow splitters and distributor devices |
| CN105003665A (en) * | 2015-08-14 | 2015-10-28 | 北京华清茵蓝科技有限公司 | Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves |
| CN106765275A (en) * | 2017-03-14 | 2017-05-31 | 江苏中能电力设备有限公司 | A kind of adjustable type differential pulverized coal distributor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815350A (en) * | 2019-11-15 | 2021-05-18 | 北京格林奔科能源科技有限公司 | Adjustable air-powder uniform distributor with uniformly distributed cross section after self-diversion flow state disturbance |
| WO2022021511A1 (en) * | 2020-07-30 | 2022-02-03 | 李伟 | Online pulverized-coal concentration regulator and method therefor |
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|---|---|
| CN107906556B (en) | 2019-04-05 |
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