CN107906556B - 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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- CN107906556B CN107906556B CN201711081635.9A CN201711081635A CN107906556B CN 107906556 B CN107906556 B CN 107906556B CN 201711081635 A CN201711081635 A CN 201711081635A CN 107906556 B CN107906556 B CN 107906556B
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- 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 methods, the balance control method is uniformly arranged multiple paddle board valves by the side inner wall in fine coal distributor, each paddle board valve is located at the nearly arrival end of fine coal distributor, and corresponds with each First air discharge pipe of top setting；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 top corresponding First air discharge pipe and downstream First air discharge pipe.The present invention utilizes paddle board valve, change the coal powder density into each First air coal pipe by adjusting the coal dust motion profile of First air discharge tube inlet front end, simultaneously because the nearly fine coal distributor arrival end of paddle board valve, fetch is long, the air quantity into each First air coal pipe is not influenced, 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 fields, and in particular to boiler First air fine coal distribution regulator structure and
Its method that control is adjusted to concentration of pulverized coal.
Background technique
For coal-burning boiler, boiler is transported in each First air discharge manage-style coal powder distribation equilibrium of same coal pulverizer
Capable safety, economy and the feature of environmental protection has great influence.First air coal powder distribation unevenness can be such that furnace flame center occurs
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 unevenness not only reduces the efficiency of combustion of boiler, and increases NOxProduction quantity 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
Wind and coal dust reach the temperature of dynamic and static separator surrounding and concentration be it is non-uniform, this will lead to First air and coal dust and reaches
There are air quantity, temperature and coal powder densities in the fine coal distributor of First air outlet-pipe inlet in circumferential concentration deviation, air quantity and
Temperature uneven and being unevenly distributed for coal dust can be further influenced, 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, the length of powder feeding pipes
Situations such as with elbow quantity, is different, and the resistance of ducting so as to cause each First air coal pipe is different, this necessarily causes
The distribution of wind powder it is uneven.Currently, 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, it may be assumed that installs adjustable contraction in each First air pulverized coal channel and (such as sets in air piping
The related construction package such as adjustable valve, plate is set to be adjusted), in the cold conditions of pure wind flow by adjusting each adjustable contracting
The opening diameter size in hole adjusts the resistance of each First air pulverized coal channel, to keep the air quantity of each First air coal pipe equal.
However, traditional adjustable contraction can only guarantee between each First air coal pipe equal (the coal dust amount not necessarily phase of air quantity
Deng) or coal dust amount it is equal (air quantity is not necessarily equal), be primarily present following problems:
1. pure air has reached resistance equilibrium, does 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 where pure wind flow, since adjustable contraction is to wind and coal dust
Resistance difference, with the coal powder density after powder operation between each First air coal pipe, there may be notable differences, to boiler safety, warp
Ji operation brings adverse effect.
2. the adjustment of adjustable contraction influences whether each First air coal pipe air velocity duct after band powder operation.
The adjustable contraction of power plant is generally after cold conditions mixes up, the wind speed deviation of each First air coal pipe when guaranteeing with powder operation
It is no longer adjusted after allowed band.Because circulation area of pipeline will be changed by adjusting adjustable contraction, it will influence to circulate simultaneously
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 to will lead to the air velocity duct less than normal, even
Cause coal dust to be accumulated, causes plugging.
3. adjustable contraction possibly can not be adjusted flexibly after band powder operation.
Due to will lead between the gap of adjustable contraction with powder operation full of coal dust for a long time, cause stuck, is difficult manually
Carry out the adjustment of adjustable contraction circulation pore size.
Summary of the invention
The purpose of the present invention is to solve defects existing in the prior art, and First air coal dust can be adjusted by providing one kind
The inlet coal powder density of outlet is distributed, and is not being increased pressure drag and do not changed the premise of each First air discharge manage-style speed
Under, the coal powder density of balanced each First air discharge pipe maintains concentration deviation 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 sides
Method is uniformly arranged multiple paddle board valves by the side inner wall in fine coal distributor, and each paddle board valve is located at the nearly arrival end of fine coal distributor
Place, and corresponded with each First air discharge pipe of top setting；By rotation oar plate valve valve plate, the valve of paddle board valve is adjusted
The angle of plate and vertical direction, the corresponding First air discharge pipe in adjusting entrance top and downstream First air discharge pipe
Coal powder density.
Wherein, each First air discharge pipe, along coal dust direction of rotation (according to design, can for clockwise,
Or 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 the following steps:
(1) it adjusts the initialization angle of each paddle board valve valve plate: adjusting each paddle board valve valve plate, it is made to enter fine coal with fine coal
The motion profile of distributor 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 B0It is calculated and is obtained by following formula:
B0=arctan(vIt is horizontal/vVertically)；
In formula: B0For valve plate initialization angle；vIt is horizontalFor First air coal dust horizontal plane where paddle board valve valve shaft circumference
Linear velocity；vVerticallyFor the speed of First air coal dust straight up.
(2) coal powder density in each First air discharge pipe of real-time monitoring: in each First air discharge pipe of real-time measurement
Coal powder density, concentration peak, concentration minimum are compared with mean concentration respectively, if absolute deviation is respectively less than
The threshold value of setting then continues to monitor fine coal real-time concentration in each First air discharge pipe；If a certain absolute deviation be greater than or
Equal to the threshold value of setting, carry out step (3)；The threshold range set is 8-15%.
(3) adjust the coal powder density in First air discharge pipe: the absolute deviation calculated according to step (2) 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 to and adjusts it when operating angle B judges in adjustable range in paddle board valve operating angle B value
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 step (2) carries out the real-time of coal powder density in each First air discharge pipe again
Measurement.
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 have 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
When threshold value, reduce the operating angle with the corresponding paddle board valve valve plate of First air discharge pipe of the coal powder density minimum；
It is 2-10 ° that paddle board valve valve plate rotates angle every time, and the operating angle B adjustable range of paddle board valve valve plate is 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, as
Reach adjusting extreme value, the coal dust of the coal powder density value of corresponding First air discharge pipe and all First air discharge pipes
When the absolute deviation of mean concentration is still greater than or is 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.That is: when adjusting paddle board valve reaches adjusting extreme value, corresponding First air coal dust goes out
The coal powder density value of mouth 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, reduced operating angle minimum limit value is that B is equal to B0；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, increasing operating angle maximum limit is that B is equal to 80 °.
System is continued to monitor and is 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.
The present invention also provides a kind of fine coal distributor equalising control device, the fine coal distributor upper end set there are four and four
A above uniformly distributed First air discharge pipe, fine coal distributor center is equipped with the coal spout of perforation, is 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, pedestal, seal member, valve
Axis, valve plate；Pedestal is fixed at the lateral wall of fine coal distributor；Valve shaft and valve plate are located at fine coal inner skeleton；Fine coal distribution
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 pedestal；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 end of electric operator；Valve shaft and bearing rotary construction package junction are equipped with seal member；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
It is 5-45 °.
Wherein, sealed between bearing rotary construction package and pedestal by O-ring, valve shaft and bearing rotary construction package it
Between the seal member that is arranged using existing conventional movable sealing structure, pass through filler and dust-proof seal ring realize dynamic sealing.
Valve plate design is round rectangle, long waist shaped, trapezoidal or oval.
Valve plate and valve shaft are all made of abrasion-resistant stee, and surface is equipped with erosion resistant ceramic coating.
Valve shaft is greater than or equal to the half of valve plate width to the distance of fine coal distributor arrival end.In the feelings for not influencing installation
Under condition, as close to arrival end.
The present invention has the advantage that compared with prior art
1) traditional adjustable contraction adjusts the fine coal flow in First air discharge pipe, is real by changing circulation area
Existing, this will adjust air quantity and coal amount simultaneously, that is to say, that air and fine coal mass ratio in First air coal pipe are hardly
Become；And before the paddle board shape coal powder density regulating valve (i.e. paddle board valve) that the present invention realizes is by adjusting First air discharge tube inlet
The coal dust motion profile at end enters the coal powder density of each First air coal pipe to change, simultaneously because the nearly fine coal distributor of paddle board valve
Arrival end, fetch is long, does not influence the air quantity into each First air coal pipe, to reach only adjusting First air discharge pipe
The purpose of middle coal powder density.
2) regulation scheme that market uses is mounted in First air pulverized coal channel, since coal dust comes into pipeline, not
Other pipelines can be entered because of adjusting, effect is unobvious；And the present invention adjusts before entering First air discharge pipe
Section can effectively adjust redistributing for the fine coal of neighbouring First air discharge pipe.
3) the paddle board shape coal powder density regulating valve that the present invention realizes does not influence the wind entered 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 is straight compared to traditional adjustable contraction using rotary motion
Line movement, seal it is relatively reliable, and will not generate because coal dust accumulation caused by bite, 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, high degree of automation, and stationarity is good.
6) the paddle board shape coal powder density regulating valve that the present invention realizes is laid out by the way of integral installation in fine coal distributor
It is interior, it is different in each First air fine coal pipe from installing in the prior art, have positional structure reasonable, is convenient for in-site installation and subsequent 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.
Detailed description of the invention
Fig. 1 is the structural schematic 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 structural schematic diagram of paddle board valve in Fig. 1；
Fig. 4 is the structural schematic diagram of seal member in Fig. 3；
Fig. 5 is that fine coal when valve plate is in initialization angle in fine coal distributor equalising control device of the present invention moves rail
Mark schematic diagram；
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 board valve, 2- electric operator, 3- fine coal distributor, 4,401,402,403,404- First air coal
Powder outlet, 5- coal spout, 1.1- valve plate, 1.2- valve shaft, 1.3- seal member, 1.3.1 airtight and watertight padding, 1.3.2 dust seal
Circle, 1.4- pedestal, 1.5- bearing rotary construction package.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
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 the quantity of 4 First air discharge pipe 4(First air discharge pipes can be as needed
Adjustment), center be equipped with coal spout 5, the electronic execution also assembling four paddle board valves 1 and being connect with paddle board valve on fine coal distributor 3
Mechanism 2, wherein 4 fixations of paddle board valve 1 are distributed on 3 weeks side walls of fine coal distributor, under First air discharge pipe 4
The wind fine coal arrival end of side and 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 (i.e. valve of paddle board valve
Axis 1.2) to fine coal distributor 3 wind fine coal arrival end distance L1 be 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, pedestal 1.4 and bearing rotary knot
Structure component 1.5；Wherein, seal member 1.3, bearing rotary construction package 1.5 are assemblied on pedestal 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
Rotational structure component is held to be fixedly linked, inner ring is set there are two annular recess, respectively in set airtight and watertight padding 1.3.1 and dust-proof seal ring
1.3.2, valve shaft 1.2 is moved with bearing rotary construction package 1.5 by airtight and watertight padding 1.3.1 and dust-proof seal ring 1.3.2 realization close
Envelope.Bearing rotary construction package 1.5, which is assemblied on pedestal 1.4, simultaneously realizes static seal by O-ring, and pedestal 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 whole sealing of fine coal distributor 3.To meet
It is required in the operating angle of paddle board valve, 0-90 ° of rotation angle range of the valve plate 1.1 of paddle board valve 1；Valve plate design is rounded square
It is shape, long waist shaped, trapezoidal or oval, length not influence valve plate installation maintenance under the premise of should reduce as far as possible and coal spout
Spacing L2(is as shown in Figure 1), to increase adjusting face.In addition, valve plate 1.1 and valve shaft 1.2 are made of 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, includes the following steps that (following steps are existed with fine coal
For 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 is that fine coal enters distributor
The equal line direction of motion profile；Wherein: the valve plate initialization angle is calculated by following formula and is obtained:
B0=arctan(vIt is horizontal/vVertically)
In formula: B0For valve plate initialization angle, paddle board valve valve plate is set with vertical direction angle as 0 °, B0As up time
The initial angle of needle rotation；vIt is horizontalFor First air coal dust horizontal plane where paddle board valve shaft peripheral velocity；vVerticallyFor First air
The speed of coal dust straight up； vIt is horizontal、vVerticallyIt is calculated according to electric power factory equipment parameter and obtains or measure acquisition.
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.
The fine coal and First air exported from coal pulverizer is mixed into fine coal distributor 3, and fine coal running track 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 almost the same, can be reduced windage and tentatively ensures the equilibrium of inner skeleton.
Step 2: the 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 acquires 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: system adjusts the coal powder density in First air discharge pipe.System is according to concentration high value or concentration
The First air discharge pipe of minimum checks its corresponding paddle board valve operating angle angle value, when operating angle B judges adjusting model
When enclosing interior, the angle of its corresponding paddle board valve valve plate is adjusted；When operating angle B reaches the maximum or minimum limit value of adjustable range
When, adjust the angle of the paddle board valve valve plate of its upstream；Then, return step two carries out coal in each First air discharge pipe again
The real time measure of powder concentration.
In step 3, the threshold value of setting is more than or equal to if it is the absolute deviation compared concentration high value, and its is right
For the paddle board valve operating angle B value answered in adjustable range, system will automatically adjust the First air discharge pipe of concentration high value
Corresponding paddle board valve reduces concentration by increasing operating angle；It is greater than if it is the absolute deviation compared concentration lower value
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 operating angle is adjusted, downstream in neighbouring First air discharge pipe
Concentration can do and decrease or increase accordingly in contrast, then, repeat Step 2: step 3, system repeatedly are adjusted, can will
In the suitable range of the concentration control of air hose.
As shown in fig. 6, be valve plate adjust when coal dust motion profile schematic diagram, specially angle B increase schematic diagram, from
The coal of the air hose (i.e. corresponding First air discharge pipe 401) of top will be reduced it is found that rotating clockwise valve plate and adjusting in figure
Powder concentration, but will increase the coal powder density of the top air hose (i.e. downstream First air discharge pipe 402) in downstream；Conversely, the inverse time
Needle rotary valve plate, angle B are reduced, and will increase the coal powder density of the air hose (i.e. corresponding First air discharge pipe 401) of top,
But the coal powder density of the top air hose (i.e. downstream First air discharge pipe 402) in downstream can be reduced.In the process, adjacent one
The pulverized coal flow of First air discharge pipe (i.e. First air discharge pipe 404,403) other than secondary wind discharge pipe not by
It influences, illustrates coal powder density regulating effect of the invention while there is good goal directness.The rotation tune of each paddle board valve
Saving angle is 2-10 °, and the operating angle B adjustable range of paddle board valve valve plate is 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
The coal powder density of extreme value, the coal powder density value of corresponding First air discharge pipe and all First air discharge pipes is average
When the absolute deviation of value is still greater than or is 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, referring to Fig. 6, it is assumed that the corresponding paddle board valve angle of First air discharge pipe 401 adjusts extreme value,
It is upstream First air discharge pipe that its First air discharge pipe 404(, which should be adjusted) corresponding paddle board valve valve plate.Specifically
Are as follows: 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 most
When high level, its corresponding paddle board valve valve in upstream First air discharge pipe (i.e. First air discharge pipe 404) is rotated counterclockwise
Plate reduces the operating angle B value of the paddle board valve valve plate, when adjusting, reduced operating angle minimum limit value 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
When value, hour hands clockwise rotate its corresponding paddle board valve in upstream First air discharge pipe (i.e. First air discharge pipe 404)
Valve plate increases the operating angle B value of the paddle board valve valve plate, when adjusting, increase operating angle maximum limit and be equal to for B
80°。
System is continued to monitor and is 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
The case where to limiting value, this should not be the adjustable problem of this system, should check the operating condition of the preceding working procedure of fine coal distributor,
At this point, system, which only feeds back corresponding paddle board valve, has reached accommodation limit, and maintain current adjustment state.
Embodiments of the present invention are described in detail above in conjunction with attached drawing, but the invention is not limited to above-mentioned
Embodiment.Such as: in the present solution, if paddle board is adjusted to the wind above it when paddle board width is smaller and level angle A is larger
The influence of pipe concentration can decrease, and mainly influence be downstream air hose concentration, under this situation, take adjusting beyond 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 field
Those of ordinary skill is that adjustment and change appropriate can be made to it within the scope of knowledge, and 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 (9)
1. a kind of 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 top corresponding First air discharge pipe and downstream First air discharge pipe；The paddle board valve
Valve shaft and the folder between First air discharge pipe axle center corresponding in the horizontal plane of place and fine coal distributor axial connecting line
Angle A is 5-45 °；The balance control method the following steps are included:
(1) it adjusts the initialization angle of each paddle board valve valve plate: adjusting each paddle board valve valve plate, it is made to enter fine coal distribution with fine coal
The motion profile 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 of real-time monitoring: the coal in each First air discharge pipe of real-time measurement
Concentration peak, concentration minimum are compared by powder concentration with mean concentration respectively, are set 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 First air discharge pipe in coal powder density: according to step (2) calculate absolute deviation, 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, adjusting the paddle board
The operating angle B of valve valve plate；When operating angle B reaches the maximum or minimum limit value of adjustable range, it is primary to adjust its upstream
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) carry out the real time measure of coal powder density in each First air discharge pipe again；The operating angle B of the paddle board valve valve plate
Adjustable range be B0To 80 °.
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 direction of rotation is its corresponding downstream one in fine coal distributor
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, it is characterised in that: paddle board in the step (3)
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 is greater than etc.
When given threshold, increase the work with the corresponding paddle board valve valve plate of First air discharge pipe of 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.
4. fine coal distributor balance control method according to claim 3, it is characterised in that: carried out in the step (3)
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 with 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, it is primary to reduce its upstream
The operating angle of the corresponding paddle board valve valve plate of wind discharge pipe.
5. fine coal distributor balance control method according to claim 4, 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.
6. fine coal distributor balance control method according to any one of claims 1 to 5, it is characterised in that: the step (3)
The adjusting angle increased or reduced every time when middle paddle board valve valve plate angular adjustment is 2-10 °.
7. fine coal distributor balance control method according to any one of claims 1 to 5, it is characterised in that: the paddle board valve
The initialization angle of valve plateB0It is calculated and is obtained by following formula:
B0=arctan(vIt is horizontal/vVertically)；
In formula: B0For valve plate initialization angle；vIt is horizontalFor First air coal dust horizontal plane where paddle board valve valve shaft peripheral speed
Degree；vVerticallyFor the speed of First air coal dust straight up.
8. fine coal distributor balance control method according to any one of claims 1 to 5, it is characterised in that: the step (2)
The middle threshold value set is 8-15%.
9. a kind of fine coal distributor equalising control device, fine coal distributor upper end set there are four and four or more uniformly distributed one
Secondary wind 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；It is special
Sign is: the inner wall of the fine coal distributor is uniformly arranged 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, pedestal, seal member, valve shaft,
Valve plate；The pedestal 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 on the pedestal by the bearing rotary construction package；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 end 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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN107906556A CN107906556A (en) | 2018-04-13 |
| CN107906556B true CN107906556B (en) | 2019-04-05 |
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| CN201711081635.9A Active 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN111853849A (en) * | 2020-07-30 | 2020-10-30 | 李伟 | Online pulverized coal concentration regulator and method |
Citations (4)
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|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006036294A1 (en) * | 2006-08-03 | 2008-02-07 | Inter Control Hermann Köhler Elektrik GmbH & Co. KG | Gas valve controlling method for use in e.g. gas chimney, involves designing and arranging valve and linear drive in such manner that electronic control detects opening/closing of valve by current/voltage measurements |
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- 2017-11-07 CN CN201711081635.9A patent/CN107906556B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN107906556A (en) | 2018-04-13 |
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Address after: Water Pavilion Road Jiangning District moling street Nanjing City, Jiangsu province 211100 No. 1266 Patentee after: Nanjing Keyuan Intelligent Technology Group Co.,Ltd. Address before: Water Pavilion Road Jiangning District moling street Nanjing City, Jiangsu province 211100 No. 1266 Patentee before: NANJING SCIYON AUTOMATION GROUP Co.,Ltd. |