CN104896496B - Adjust the device and method of each tube cell powder amount deviation of unit pulverized-coal system - Google Patents
Adjust the device and method of each tube cell powder amount deviation of unit pulverized-coal system Download PDFInfo
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- CN104896496B CN104896496B CN201510264326.XA CN201510264326A CN104896496B CN 104896496 B CN104896496 B CN 104896496B CN 201510264326 A CN201510264326 A CN 201510264326A CN 104896496 B CN104896496 B CN 104896496B
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Abstract
The invention discloses a kind of device for adjusting each tube cell powder amount deviation of unit pulverized-coal system, including main tube cell, the main tube cell side is provided with wind powder cylinder, the main tube cell is connected by the second branch pipe with wind powder cylinder upper end, the main tube cell is connected by the first branch pipe with wind powder cylinder bottom, the wind powder cylinder lower end is connected with coal dust down-comer, and bypass regulation door is provided with second branch pipe；Also disclose a kind of method for adjusting each tube cell powder amount deviation of unit pulverized-coal system, the leveling and the leveling of boiler thermal-state First air that each tube cell powder amount can be realized are carried out simultaneously, reach the same First air ground, powder while leveling, eliminates thermal deviation caused by the imbalance because of same each tube cell powder amount of mill common at present.
Description
Technical field
The present invention relates to a kind of device and method for adjusting each tube cell powder amount deviation of unit pulverized-coal system, it is mainly used in pot
Stove is manufactured and transformation field.
Background technology
Pulverized-coal fired boiler mainly includes in current industry corner tangential firing, opposed firing burning and W flame burning pot
Stove, largely uses unit pulverized-coal system.The system is without individually with powder function, it is believed that the wind in same each tube cell of mill reaches
To balance, then powder just reaches balance, and this is also main processing mode in the industry at present, but discovery in actual commissioning test,
Even after the First air leveling of same each tube cell of mill, powder amount still has larger deviation, and the solution that there is no at present is done
Method.The deviation of same each tube cell powder amount of mill, can cause the inequality of hearth combustion intensity, glance off, cause furnace outlet each
Thermal deviation of the heating surface along stove cross direction, economy, safe operation to boiler are adversely affected.
Existing conventional unit pulverized-coal system uses First air powder feeding, it is believed that each tube cell First air of same mill is adjusted
Flat, then the powder amount of each tube cell just reaches balance.The leveling of each tube cell First air, it is each by measurement when First air leveling is tested
The wind speed of tube cell, adjusts the adjustable contraction of each tube cell, changes the resistance of each tube cell, so as to reach the mesh of each tube cell air quantity of leveling
's.Which is the technological means mainly used in industry, and this method is without the special means for being used to adjust each tube cell powder amount.
Found in actual motion debugging, even after same each tube cell air quantity leveling of mill, powder amount still there may be larger deviation,
And randomness is larger, it is difficult to control.The deviation of each tube cell powder amount, causes boiler wide along stove（Opposed firing, w flame combustion boilers）
Or corner（Tangentially firing boiler）Burning exert oneself it is unbalanced, cause the large-size screen monitors of furnace outlet, exceed, it is high again, wall it is again etc. heated
The thermal deviation of face both sides is larger, local overheating, the problems such as desuperheating water is big, while the pollutant emission such as ash, slag, NOx to burner hearth
Control etc. cause adjustment to hinder.
The content of the invention
It is an object of the invention to provide a kind of device and method for adjusting each tube cell powder amount deviation of unit pulverized-coal system,
The leveling and the leveling of boiler thermal-state First air that each tube cell powder amount can be realized are carried out simultaneously, reach First air, the powder of same mill
While leveling, eliminates thermal deviation caused by the imbalance because of same each tube cell powder amount of mill common at present.
The present invention is achieved through the following technical solutions：
The device of each tube cell powder amount deviation of unit pulverized-coal system, including main tube cell are adjusted, is set in the main tube cell side
Wind powder cylinder is equipped with, the main tube cell is connected by the second branch pipe with wind powder cylinder upper end, the main tube cell passes through
One branch pipe is connected with wind powder cylinder bottom, the lower section connection coal dust down-comer of the first branch pipe, institute on the wind powder cylinder
State and bypass regulation door is provided with the second branch pipe.
Primary wind and powder enters after main tube cell, during by the first branch pipe, and part primary wind and powder is dividedly flowed into the separation of inlet air powder
In cylinder, enter after the part coal dust in the primary wind and powder in inlet air powder cylinder is separated and it is settled by coal dust down-comer
After can directly reclaim, and shedding primary wind and powder by the second branch pipe can continue to enter main tube cell, due to one after shunting
Secondary wind powder passes through shedding, and the powder amount being input to from the second branch pipe in the shedding primary wind and powder of main tube cell greatly reduces, and by adjusting
The flow rectified the incorrect style of work in powder cylinder, you can realize the regulation to the defeated powder outlet quantity of main tube cell, realize the tune of each main tube cell powder amount deviation
Section.By bypassing the flow that regulation door regulation is entirely bypassed, and then it can conveniently adjust the powder amount for being output to burner hearth.
Existing coal pulverizer outlet generally has longer upward straight length, i.e., main tube cell can be in each main tube cell
On be respectively provided with above-mentioned first branch pipe, the second branch pipe, wind powder cylinder, powder amount regulation can be carried out by being respectively mounted each main tube cell.
By adjusting the powder amount that each tube cell is exported simultaneously, realize and eliminate with the regulation for grinding each tube cell powder amount deviation, and then reduce thermal deviation.
Further, for the present invention is better achieved, first branch pipe is aweather tilted towards on powder cylinder edge by main tube cell
Upper to set, second branch pipe is aweather set on powder cylinder edge diagonally downward by main tube cell.By above-mentioned set-up mode, it can make
Primary wind and powder more smoothly passes over the first branch pipe and enters inlet air powder cylinder, meanwhile, also it can make the primary wind and powder of shedding more
Move smoothly through the second branch pipe and enter main tube cell from wind powder cylinder, more conform to Laws of Mechanics, improve the shunting of primary wind and powder
Efficiency.
Further, for the present invention is better achieved, the coal dust down-comer is connected with feeder.By coal dust down-comer
It is connected with feeder, can conveniently reclaims the coal dust isolated from wind powder cylinder, it is conveniently recovered to powder manufacturing apparatus.
Further, for the present invention is better achieved, flapper is provided between the coal dust down-comer and feeder.This
Twice flapper can be used in invention, wherein will together be arranged on the different coal dust down-comers of same coal pulverizer, second is locked
Gas device is arranged on above feeder, by the coal dust of coal dust down-comer after one of flapper, with same coal pulverizer other
Coal dust down-comer and after the coal dust mixing that comes, then by being admitted to feeder after one of flapper, by setting flapper, energy
Enough prevent that malleation First air enters in coal dust down-comer in feeder.
Further, for the present invention is better achieved, 2 roads lock gas is provided between the coal dust down-comer and feeder
Device.Exported in coal pulverizer and the first branch pipe, wind powder cylinder and the second branch pipe are respectively provided with each main tube cell for main tube cell
Primary wind and powder is shunted, and sets flapper below its coal dust down-comer, will with coal pulverizer corresponding coal dust down-comer
In coal dust collect after, one of flapper is set again on its pipeline, the coal dust of same coal pulverizer output is being output to coal
Mixed again before machine.By setting twice flapper, the malleation First air being prevented from feeder enters powder inlet pipe, influences coal
Powder separative efficiency.
Further, for the present invention, the straight tube that the main tube cell upwardly extends for axis is better achieved.
The invention also discloses a kind of method for adjusting each tube cell powder amount deviation of unit pulverized-coal system, including following step
Suddenly：
S1：First branch pipe formation, first burst of wind powder bypass is set on the straight length of main tube cell, makes wind powder bypass with setting
Put the wind powder cylinder in main tube cell side to be connected, wind powder is entered inlet air powder cylinder；
S2：The second branch pipe is set in wind powder cylinder upper end, the second branch pipe is connected with main tube cell and wind powder cylinder, made
Shedding wind enters main tube cell by the second branch pipe；
S3：Bypass regulation door is set on second branch pipe, when main tube cell powder amount is bigger than normal, big bypass regulation door is opened,
More wind powder is entered inlet air powder cylinder, more coal dusts is separated by wind powder cylinder；Conversely, then reversely adjustment；
S4：Set coal dust to decline in the wind powder cylinder lower end and its pipe is connected into feeder, make the coal dust isolated
Into coal, pulverulent fuel mixer.
The primary wind and powder for being input to main tube cell is shunted by first burst of wind powder bypass by step S1, input
Into wind powder cylinder, the function of sector-style powder separation can be entered using wind powder cylinder, by the coal dust part in primary wind and powder point
Separate out and；Primary wind and powder after the shedding that will be diverted into by step S2 in inlet air powder cylinder is again inputted into main tube cell, by
Coal dust is partially separated out in by wind powder cylinder, thus the shedding from second strand of wind powder bypass input to main tube cell is once
Coal dust content is substantially reduced in wind powder；By step S3, it can be exported by adjusting bypass regulation door to adjust from the second branch pipe
Powder amount, when main tube cell powder amount is excessive, will bypass regulation Men Kai great, then enter primary wind and powder amount in inlet air powder cylinder and increase
Greatly, primary wind and powder realizes that shedding is operated in wind powder cylinder, then is output to from the second branch pipe in main tube cell, due to main tube cell
Primary wind and powder is handled by the shedding of wind powder cylinder so that the powder containing quantity reduction in main tube cell；On the contrary, in main tube cell powder amount
When too small, bypass regulation door is turned down, makes to reduce into the primary wind and powder in inlet air powder cylinder, the coal separated by wind powder cylinder
Powder is also reduced；Reclaimed by the step S4 coal dusts for separating wind powder cylinder.
Due to by the way of shunting shedding is carried out to primary wind and powder, and the primary wind and powder after shedding being again inputted into master
Tube cell is interior and is output to burner hearth, and bypass that can be by adjusting the second branch pipe adjusts door, adjusts the flow realization pair entirely bypassed
The regulation for the powder amount that main tube cell is directly exported；By the way that wind powder cylinder lower end is connected by coal dust down-comer with feeder,
The coal dust that directly can will be disengaged from out is directly recovered to powder link processed.
Further, it is not less than 18m/s for wind speed in the present invention, the main tube cell is better achieved.In order to ensure once
Wind powder can be exported smoothly from main tube cell, in the inventive method, and the primary wind and powder wind speed in the main tube cell is not less than 18m/s,
When needed, its interior wind speed of adjustment can be realized by adjusting main tube cell internal diameter.
Further, it is no more than 5m/s for wind speed in the present invention, the wind powder cylinder is better achieved.In order to keep wind
In powder cylinder in the separative efficiency of coal dust, the inventive method, the wind speed in the wind powder cylinder is less than in main tube cell once
The wind speed of wind, in design, can make shunting once changing separative efficiency by way of adjusting the internal diameter of wind powder cylinder
Wind powder keeps certain shedding efficiency.
Further, for the present invention is better achieved, isothermal holding is carried out to the bypass regulation door and coal dust down-comer.
Due in coal dust and inner-walls of duct contact process, easily producing cooling, cause the hydrogenesis in coal dust, thus easily block pipe
Road.The inventive method makes bypass adjust door and coal dust decline by carrying out isothermal holding to bypass regulation door and coal dust down-comer
Pipe keeps uniform temperature, prevents from producing condensation in coal dust contact process, and then bypass regulation door and coal dust can be avoided to decline
The blocking of pipe.
The present invention compared with prior art, has the advantages that：
（1）Simple in construction, simple operation of the invention.Boiler is completed after cold conditions First air leveling, the leveling of each tube cell powder amount
It can simultaneously be carried out with the hot First air leveling of boiler, so as to reach the leveling simultaneously of the First air of same mill, powder, eliminate current
Common grinds thermal deviation caused by the imbalance of each tube cell powder amount because of same.After the completion of adjustment, it is not required to during day-to-day operation
To be adjusted again, it is simple and convenient；
（2）Reliability of the present invention is high, not easy to wear.The principle that the device is used for reduce First air air velocity duct side
Method, settles coal powder natural, so as to reach the purpose of regulation tube cell powder amount, shunting device powder amount is decreased obviously, degree of wear meeting
Substantially mitigate, main tube cell is because the reason for shunting, flow velocity declines, and abrasion condition can also be reduced, can run reliably and with long-term.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the embodiment of the present invention 1；
Fig. 2 is the tube cell coal, pulverulent fuel mixer schematic diagram of the embodiment of the present invention 3 four；
Fig. 3 is the tube cell coal, pulverulent fuel mixer schematic diagram of the embodiment of the present invention 3 three.
Wherein：101-main tube cell；102-the first branch pipe；103-wind powder cylinder；104-the second branch pipe；105-other
Road adjusts door；106-coal dust down-comer；107-flapper；108-the first tube cell；109-the second tube cell；110-the three powder
Pipe；111-the four tube cell.
Embodiment
The present invention is described in further detail with reference to specific embodiment, but embodiments of the present invention are not limited to
This.
Embodiment 1：
A kind of device dedicated for adjusting each tube cell powder amount of coal pulverizer is disclosed in the present embodiment, each tube cell is not being influenceed
In the case of air quantity leveling, the powder amount to each tube cell is adjusted, so as to reach the purpose of each tube cell powder amount of leveling coal pulverizer, disappears
Except because each tube cell powder amount distribution of coal pulverizer is uneven and causes the problem of boiler combustion thermal deviation is big, prevent from or weaken burner hearth to go out
The local overheating of each heating surface of mouth, protects heating surface, makes high efficiency boiler, safety, economical operation.
As shown in figure 1, a kind of device for adjusting each tube cell powder amount deviation of unit pulverized-coal system, including main tube cell 101,
The side of main tube cell 101 is provided with wind powder cylinder 103, and the main tube cell 101 passes through the second branch pipe 104 and wind powder cylinder
103 upper ends are connected, and the main tube cell 101 is connected by the first branch pipe 102 with the bottom of wind powder cylinder 103, the wind powder
The lower end of cylinder 103 is connected with coal dust down-comer 106.In the present embodiment, control what is exported from the second branch pipe 104 for convenience
Air quantity, is provided with bypass regulation door 105 on second branch pipe 104.
Generally all there is longer straight length, i.e., main tube cell 101, the adjustment coal-grinding described in the present embodiment in coal pulverizer outlet
The device of machine tube cell powder amount is arranged on the straight length.
As shown in figure 1, the primary wind and powder for exporting output from coal pulverizer is input to by A directions in main tube cell 101, part one
Secondary wind powder is directly inputted to burner hearth along B directions, and due to there is the first branch pipe 102, part primary wind and powder enters inlet air along C directions
Powder cylinder 103, due to the carrying capacity reduction of the coal dust in wind powder cylinder 103, part coal powder natural deposition, the E along along Fig. 1
Coal dust down-comer 106 is dropped down onto under direction, can be input to by coal dust down-comer 106 along along Fig. 1 in coal, pulverulent fuel mixer in H directions；
The wind after shedding in the wind powder cylinder 103 D directions still along along Fig. 1 are up, and F directions are through being arranged on wind along in Fig. 1
Second branch pipe 104 of the upper end of powder cylinder 103 is input in main tube cell 101, and then is input to burner hearth along G directions.This implementation
In example, first branch pipe 102, wind powder cylinder 103, the second branch pipe 104 collectively form the bypass of wind powder.
When needing adjustment wind powder bypass wind speed, wind powder bypass air quantity can be changed by adjusting bypass regulation door 105.
Bypass regulation door 105 can be realized to the bypass powder amount regulation of wind powder.During powder amount leveling, if it find that certain main tube cell 101
Powder amount is bigger than normal, then can open big corresponding bypass of the main tube cell 101 and adjust door 105, make air quantity, the change of powder amount of wind powder bypass,
The coal dust isolated is collected by the device and send return pulverized coal preparation system, when opening big bypass regulation door 105, and main tube cell is along Fig. 1
The powder amount of middle B directions output is reduced, the primary wind and powder amount increase entered in inlet air powder cylinder 103 so that a large amount of coal dusts are separated,
The powder amount for being output to main tube cell 101 from the second branch pipe 104 is reduced, and from main tube cell, G directions are output to the powder amount of burner hearth and subtracted along along Fig. 1
It is few, conversely, then can reversely adjust.
When being input to due to being input to the primary wind and powder of main tube cell 101 by the first branch pipe 102 in wind powder cylinder 103,
Coal dust is fallen by the barrel for throwing to wind powder cylinder 103 under the action of the centrifugal force, and the coal dust isolated falls into coal dust down-comer
106, and the shedding wind after separating can be then that the second branch pipe 104 is exported by outlet.Due to being input to the portion of main tube cell 101
Primary wind and powder is divided to be shunted by the first branch pipe 102 so that the primary wind and powder amount directly exported from main tube cell 101 is reduced, the separation of wind powder
Wind powder flow rate in cylinder 103 is less than main tube cell 101, can be passed through being adjusted by way of adjusting the internal diameter of wind powder cylinder 103
The flow velocity of its internal wind powder.
After cold conditions First air leveling is completed to boiler, the hot First air leveling being input in main tube cell 101 can
Carry out simultaneously, realize First air, the powder leveling simultaneously of same mill, eliminate existing equipment because with the injustice for grinding each tube cell powder amount
Thermal deviation caused by weighing apparatus.
Due to, using the method for reducing the main duct velocity of tube cell 101, utilizing 102 pairs of main tube cells of the first branch pipe in the present embodiment
101 First air is shunted, and pulverized-coal cyclone low is separated or natural subsidence, the powder of main tube cell 101 is input to from the second branch pipe 104
Amount is decreased obviously, and then can realize the purpose for adjusting main tube cell powder amount, simultaneously so that the main abrasion of tube cell 101 is significantly reduced, and is made
It can run reliably and with long-term.
In order to make primary wind and powder pass through in wind powder by-pass shunt, the present embodiment, it is preferable that first branch pipe
102 by main tube cell 101, aweather powder cylinder 103 is along tilting upward setting, and second branch pipe 104 is by main tube cell 101 aweather powder
Cylinder 103 along setting diagonally downward.
, can be by the first branch pipe 102 along tangent line side after primary wind and powder enters main tube cell 101 by above-mentioned setting
To inlet air powder cylinder 103 is entered, because primary wind and powder is to enter main tube cell 101 along Figure 1A directions, when the edge of the first branch pipe 102
When the main length direction of tube cell 101 tilts upward setting, primary wind and powder can be made swimmingly to be shunted from the first branch pipe 102, and passed through
Primary wind and powder after the shedding of wind powder cylinder 103 also can be exported smoothly from the second branch pipe 104, make total more adduction
Reason, wind powder flowing is more smooth.
Focus on for convenience in the coal dust that wind powder cylinder 103 is isolated, the present embodiment, the coal dust down-comer
106 are connected with feeder.By the way that coal dust down-comer 106 is connected with feeder, conveniently directly coal dust can be concentrated and returned
Return to pulverized coal preparation system.
Embodiment 2：
Because there is powder amount deviation in existing unit pulverized-coal system First air leveling mode so that hearth combustion intensity is not
, to boiler economy, safe operation are adversely affected, and blowing powder producing system can be conveniently adjusted the invention discloses one kind
The method for each tube cell powder amount deviation of part of uniting.
The invention discloses a kind of method for adjusting each tube cell powder amount deviation of unit pulverized-coal system, comprise the following steps：
S1：First branch pipe 102 formation, first burst of wind powder bypass is set on up main tube cell 101, the wind powder is bypassed
It is connected with the wind powder cylinder 103 for being arranged on the main side of tube cell 101, primary wind and powder is entered inlet air powder cylinder 103；
By setting the first branch pipe 102, after primary wind and powder enters main tube cell 101, it can be shunted by the first branch pipe 102
Enter inlet air powder cylinder 103 so that the primary wind and powder amount for being directly output to burner hearth from main tube cell 101 is reduced；
S2：Second branch pipe 104 formation, second burst of wind powder bypass is set in the upper end of wind powder cylinder 103, the wind powder is bypassed
It is connected with main tube cell 101, shedding wind is entered main tube cell 101 by the second branch pipe 104；
By setting the second branch pipe 104 so that the primary wind and powder in wind powder cylinder 103 after shedding passes through second
Branch pipe 104 enters main tube cell 101, and by this way, the primary wind and powder for entering inlet air powder cylinder 103 that can make passes through shedding,
Make from the second branch pipe 104 be output to the wind powder of main tube cell 101 in coal dust content reduce；
S3：Bypass regulation door 105 is set on second branch pipe 104, when the main powder amount of tube cell 101 is bigger than normal, big side is opened
Road adjusts door 105, more wind powder is entered inlet air powder cylinder 103, more coal dusts is separated by wind powder cylinder 103；Instead
It, then reversely adjustment；
By adjusting the folding size of bypass regulation door 105, it can adjust and be diverted into inlet air powder cylinder 103 once
Wind powder amount, when bypass regulation door 105 opens big, is diverted into the primary wind and powder amount increase in inlet air powder cylinder 103, primary wind and powder
Coal dust separation is carried out in wind powder cylinder 103, the shedding primary wind and powder after shedding enters air main by the second branch pipe 104
101, due to being input to the primary wind and powder of main tube cell 101 by shunting shedding so that the primary wind and powder of the main end of tube cell 101 output
Middle coal dust content reduction；The folding size of bypass regulation door 105 can be adjusted as needed, adjust the primary wind and powder amount of shunting.
S4：Coal dust down-comer 106 is set in the lower end of wind powder cylinder 103 and feeder is connected, makes to isolate
Coal dust enter coal, pulverulent fuel mixer.
Due to by wind powder cylinder 103 primary wind and powder pass through shedding after, coal dust can downward natural sediment, for side
Just centralized recovery processing coal dust, by the way that the lower end of coal dust down-comer 106 is connected into feeder, mixes the convenient coal dust that enters of coal dust
Device.
The present embodiment is shunted by using step S1 to the primary wind and powder for entering main tube cell 101 so that from main tube cell
The powder amount of the primary wind and powder of 101 outputs is minimized, and can be adjusted in step s 2 by the bypass adjusted on the second branch pipe 104
Section door 105 adjusts the flow entirely bypassed, and then can be conveniently adjusted the powder amount that burner hearth is output to from main tube cell 101.This hair
It is bright to realize the powder amount for adjusting main tube cell 101 by above-mentioned steps, simultaneously as this method uses simple in construction, can
Said structure is respectively provided with single main tube cell 101, can facilitate and each main tube cell 101 is all adjusted, realize in burner hearth
The effect of homogenous combustion.
Preferably, in the present embodiment, wind speed is not less than 18m/s in the main tube cell 101.Because the first branch pipe 102 needs
Selected according to the specific size of main tube cell 101, to ensure the powder amount of the main output of tube cell 101, in order to keep the wind of main tube cell
Speed.
In order to ensure in the separative efficiency of coal dust, the present embodiment, it is preferable that wind speed does not surpass in the wind powder cylinder 103
Cross 5m/s.When primary wind and powder is input to wind powder cylinder 103 by the first branch pipe 102, in order to ensure will enter into wind powder point
Separated from the coal dust in the primary wind and powder in cylinder 103, the wind speed in wind powder cylinder 103 must be kept to be no more than 5m/s.
In use, heat dissipation of pipeline can be likely to result in coal dust cooling, and now the hydrogenesis in coal dust can be caused
Coal dust down-comer 106 is blocked, therefore, in the present embodiment, the bypass regulation door 105 and coal dust down-comer 106 are incubated
Processing.Prevent that tube-cooled from causing the hydrogenesis in coal dust to block coal dust down-comer 106 or jam flapper 107.
Embodiment 3：
As shown in Fig. 2 in the present embodiment, flapper 107 is provided between the coal dust down-comer 106 and feeder.
For existing 300MW tangentially-fired boilers, medium-speed pulverizer unit pulverized-coal system, the main tube cell 101 of separate unit disintegrating outlet 4 divides
Not Wei the first tube cell 108, the second tube cell 109, the 3rd tube cell 110, the 4th tube cell 111, filled on above-mentioned every main tube cell 101
Adjusting means described in figure 1 above, the powder amount deviation for adjusting each main tube cell 101.On each coal dust down-comer 106
Flapper 107 is set.
As shown in figure 3, for 660MW face-fired boilers, medium-speed pulverizer unit pulverized-coal system, 3 masters of separate unit disintegrating outlet
Tube cell 101, respectively the first tube cell 108, the second tube cell 109, the 3rd tube cell 110, in above-mentioned first tube cell 108, the second tube cell
109th, the adjusting means described in Fig. 1 is loaded onto on the 3rd tube cell 110, the powder amount deviation for adjusting each main tube cell 101.The
One tube cell 108, the second tube cell 109, the 3rd tube cell 110 are divided into two again in stokehold, are changed into 6 main tube cells 101.
Coal dust in coal dust down-comer 106 is after one of flapper 107, and from the corresponding coal of same coal pulverizer other tube cells
Powder down-comer 106 and after the coal dust mixing that comes, then after one of flapper 107, send into feeder.The energy of flapper 107
Enough playing prevents that the malleation First air in feeder from entering coal dust down-comer 106.
In the present embodiment, due to using flapper 107 is set between coal dust down-comer 106 and feeder, enabling to
Coal dust normally returns to feeder and prevents that the wind in feeder from entering powder inlet pipe.
Claims (10)
1. adjust the device of each tube cell powder amount deviation of unit pulverized-coal system, it is characterised in that：In each master of same coal pulverizer
Tube cell（101）On be provided with the first branch pipe（102）, the second branch pipe（104）, wind powder cylinder（103）, in the main tube cell
（101）Side is provided with wind powder cylinder（103）, the main tube cell（101）Pass through the second branch pipe（104）With wind powder cylinder
（103）Upper end is connected, the main tube cell（101）Pass through the first branch pipe（102）With wind powder cylinder（103）Bottom is connected,
The wind powder cylinder（103）Lower end and coal dust down-comer（106）It is connected, wind powder cylinder（103）With coal dust down-comer
（106）Connecting portion be arranged on the first branch pipe（102）With wind powder cylinder（103）Connecting portion below, second branch pipe
（104）On be provided with bypass regulation door（105）.
2. the device of regulation each tube cell powder amount deviation of unit pulverized-coal system according to claim 1, it is characterised in that：Institute
State the first branch pipe（102）By main tube cell（101）Aweather powder cylinder（103）Edge tilts upward setting, second branch pipe（104）
By main tube cell（101）Aweather powder cylinder（103）Edge is set diagonally downward.
3. the device of regulation each tube cell powder amount deviation of unit pulverized-coal system according to claim 1 or 2, its feature exists
In：The coal dust down-comer（106）It is connected with feeder.
4. the device of regulation each tube cell powder amount deviation of unit pulverized-coal system according to claim 3, it is characterised in that：Institute
State coal dust down-comer（106）Flapper is provided between feeder（107）.
5. the device of regulation each tube cell powder amount deviation of unit pulverized-coal system according to claim 4, it is characterised in that：Institute
State coal dust down-comer（106）2 road flappers are provided between feeder（107）.
6. the device of regulation each tube cell powder amount deviation of unit pulverized-coal system according to claim 1 or 2, its feature exists
In：The main tube cell（101）The straight tube upwardly extended for axis.
7. adjust the method for each tube cell powder amount deviation of unit pulverized-coal system, it is characterised in that：Comprise the following steps：
S1：In main tube cell（101）Straight length on the first branch pipe is set（102）Form first strand of wind powder
Road, makes wind powder bypass with being arranged on main tube cell（101）The wind powder cylinder of side（103）It is connected, enters wind powder
Wind powder cylinder（103）；
S2：In wind powder cylinder（103）Upper end sets the second branch pipe（104）, the second branch pipe（104）With main tube cell（101）And wind
Powder cylinder（103）It is connected, shedding wind is passed through the second branch pipe（104）Into main tube cell（101）；
S3：In second branch pipe（104）It is upper that bypass regulation door is set（105）, in main tube cell（101）When powder amount is bigger than normal, open big
Bypass regulation door（105）, more wind powder is entered inlet air powder cylinder（103）, more coal dusts is passed through wind powder cylinder（103）
Separation；Conversely, then reversely adjustment；
S4：In the wind powder cylinder（103）Lower end sets coal dust down-comer（106）And feeder is connected, make to isolate
Coal dust enter coal, pulverulent fuel mixer.
8. the method for regulation each tube cell powder amount deviation of unit pulverized-coal system according to claim 7, it is characterised in that：Institute
State main tube cell（101）Interior wind speed is not less than 18m/s.
9. the method for regulation each tube cell powder amount deviation of unit pulverized-coal system according to claim 8, it is characterised in that：Institute
State wind powder cylinder（103）Interior wind speed is no more than 5m/s.
10. the method for each tube cell powder amount deviation of regulation unit pulverized-coal system according to claim any one of 7-9, it is special
Levy and be：To the bypass regulation door（105）With coal dust down-comer（106）Carry out isothermal holding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264326.XA CN104896496B (en) | 2015-05-22 | 2015-05-22 | Adjust the device and method of each tube cell powder amount deviation of unit pulverized-coal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264326.XA CN104896496B (en) | 2015-05-22 | 2015-05-22 | Adjust the device and method of each tube cell powder amount deviation of unit pulverized-coal system |
Publications (2)
| Publication Number | Publication Date |
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| CN104896496A CN104896496A (en) | 2015-09-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4830287A (en) * | 1987-10-06 | 1989-05-16 | The Babcock & Wilcox Company | Pulverized coal flow control system |
| FI910418A (en) * | 1991-01-29 | 1992-07-30 | Finnpulva Ab Oy | FOERFARANDE OCH ANLAEGGNING FOER KLASSIFICERING AV GAS-FASTSUBSTANSSTROEMMEN FRAON EN MOTSTRAOLSKVARN. |
| JPH08187466A (en) * | 1995-01-06 | 1996-07-23 | Sekisui Chem Co Ltd | Equipment for classifying and recovering plastic component from glass fiber-containing reinforced plastic product |
| CN2658589Y (en) * | 2003-11-10 | 2004-11-24 | 电站锅炉煤清洁燃烧国家工程研究中心 | Vertical double adjustable pulverized-coal distributor |
| JP5260034B2 (en) * | 2007-11-30 | 2013-08-14 | 三菱重工業株式会社 | Powder separator and solid fuel burner |
| CN202028433U (en) * | 2011-04-02 | 2011-11-09 | 广西桂柳化工有限责任公司 | Pulveriser for producing electrolytic manganese dioxide |
| CN202813423U (en) * | 2012-08-31 | 2013-03-20 | 北京帕尔斯德科技发展有限公司安徽分公司 | Coal powder homogenizer |
| CN203656957U (en) * | 2013-12-27 | 2014-06-18 | 哈尔滨锅炉厂有限责任公司 | Tower-type pulverized coal pipeline used for fan coal mill |
| CN203823791U (en) * | 2014-03-28 | 2014-09-10 | 烟台龙源电力技术股份有限公司 | Pulverized coal equipartition device, pulverized coal conveying pipeline and equipartition device |
| CN204268501U (en) * | 2014-11-28 | 2015-04-15 | 国家电网公司 | There is the power station boiler pulverizing system of wind speed calibration equipment |
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