CN106989412A - Powder and by weight air distribution control device and its control method are supplied by coal dust balanced weight - Google Patents
Powder and by weight air distribution control device and its control method are supplied by coal dust balanced weight Download PDFInfo
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- CN106989412A CN106989412A CN201611225253.4A CN201611225253A CN106989412A CN 106989412 A CN106989412 A CN 106989412A CN 201611225253 A CN201611225253 A CN 201611225253A CN 106989412 A CN106989412 A CN 106989412A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a kind of " by coal dust balanced weight for powder and air distribution control device and its control method by weight ", the device is made up of deliver coal powder Weight-measuring device, primary air speed measuring device, secondary wind speed measurement apparatus and blower fan etc. of wind.The device is arranged in existing coal-burning boiler powder, powder-supply system, each air delivery pipe coal dust weight is measured and balanced for powder control, and air distribution control is carried out according to coal dust weight, make coal dust weight with meeting given excess air coefficient α requirements with the ratio between air quantity.Using the present invention each bypass line as-fired coal powder weight can be made consistent, each bypass line coal dust weight is consistent with the ratio between air quantity, make boiler coal-ash flameholding, thermic load, uniformity of temperature profile, coal dust firing is fully efficient, so as to meet efficient, consumption reduction, emission reduction requirement, the stability, security, economy of boiler operatiopn are also improved.
Description
Technical field
It is related to coal-burning boiler equilibrium by weight and supplies powder and by weight air distribution.
Background technology
Coal-burning boiler, such as coal-fired power station boiler, big thermoelecrtic boiler, Industrial Boiler, cement kiln boiler are sent using wind
Pipeline supplies powder to boiler, for example：Powder processed, the powder-supply system of large-sized station boiler, powder, one coal-grinding of every layer of use are supplied using multilayer
Mechanism powder, powder is supplied with multiple air delivery pipes.Large-sized boiler is typically three layers --- and six layers supply powder, one coal pulverizer of every layer of use, band
Four pipelines, 12-24 pipeline altogether, each layer device therefor is identical.(such as Fig. 1 is expressed as follows with one layer of powder processed, for powder equipment
It is shown)：
Certain mass coal dust enters stove burning, need to match somebody with somebody the air of certain volume.1Kg (or 1m3) fuel burn completely (burning
Afterwards without remaining oxygen) needed for bottom line air capacity (with V0Represent) it is referred to as theoretical air requirement, during boiler operatiopn, to make
Fuel after-flame, the air capacity of effective supply is (with VkRepresent), always slightly larger than theoretical air requirement V0, itsReferred to as excess air
Coefficient, i.e.,：
α --- represented with exhaust gas volumn, β --- represented with air capacity；
Weight of fuel W(kg)Burning completely need to be with air capacity：
Can excess air coefficient size, in addition to directly affecting coal dust and burn completely, can also influence fuel fire, burning
Thermal losses and pollutant yield in stability and flue gas.It can be seen that α or β are the important parameters of boiler operatiopn.
Existing powder processed, powder-supply system are with two loops pairWhat ratio was adjusted.One is that fuel quantity is adjusted back
Road, heat load adjustment needed for fuel quantity tracking generates electricity, two be to match somebody with somebody air quantity according to oxygen content regulation in flue gas, maintains excess air
Factor alpha is in the certain limit of setting, oxygen content and α relations：
O2--- amount of oxygen
Oxygen content is aware of, formula can calculate excess air coefficient α by (3).
Existing powder processed, powder-supply system regulation fuel quantity/there is problem with air quantity have：
1st, air quantity is matched somebody with somebody according to flue gas oxygen content regulation, is that one kind lags regulation, flue gas oxygen content only reflects coal dust firing shape
Condition (burning deficiency, excessive, burning completely of burning).This regulation that lags, it is impossible to air quantity is matched somebody with somebody according to coal dust adjustment of weight, madeThe ratio between reach the complete burning condition of coal dust in real time；
2nd, existing powder processed, powder-supply system, each branch road air delivery pipe coal dust weight change and each bypass line deviation of weight become
Change and influenced each other with the change of each branch road air distribution amount of Secondary Air and change of error, cause each branch roadThe ratio between change it is big, from
And causing uneven, the unstable and burning quality that burnt in stove to decline, such as oxygen content is more in flue gas, should lower with air quantity, but this
Shi Ruguo as-fired coal powder amounts increase, and opposite air distribution effect can be caused by being lowered with air quantity.
There is problem for above-mentioned, the invention discloses a kind of " by coal dust balanced weight for powder and air distribution control by weight
Device and its control method ", can be achieved balanced by weight for powder and air distribution control by weight.
The content of the invention
The control device of the present invention is made up of two control loops, and one is that as-fired coal powder weight and Secondary Air air quantity are equal
Weigh control loop, and two be according to coal dust weight air distribution control loop.The technical problem solved is：
1st, using " wind deliver coal powder Weight-measuring device ", solve the problems, such as that wind is delivered coal coal dust weight measurement in powder pipeline；
2nd, using Balance route technology, each bypass line coal dust weight W of First air is solvedA、WB、WC、WDConsistent equilibrium
For powder problem；
3rd, using Balance route technology, solve each bypass line of Secondary Air and match somebody with somebody air quantity V2A、V2B、V3C、V4DConsistent equilibrium
Air distribution problem, realizes that equilibrium, for powder, balanced air feed, can make coal dust firing in stove uniformly, stably, improve burning quality；
4th, according to air quantity is matched somebody with somebody after coal dust weight after equilibrium and equilibrium, (become using from motion tracking variable element and set controlling value)
Control technology, make each branch road coal dust weight and each branch road with air quantity i.e.The ratio between it is consistent, the air distribution ratio again with it is given
Excess air coefficient α it is consistent, meet the complete burning condition of as-fired coal powder weight, can fully, efficient burning.
One kind " balanced by weight to supply powder and by weight air distribution control device " of the present invention, installed in existing coal-burning boiler
In powder processed, powder-supply system, it is technically characterized in that, including：
Wind is delivered coal powder Weight-measuring device (12) or (12A), (12B), (12C), (12D), installed in an air delivery pipe
House steward (6) or branch pipe (6A), (6B), (6C), (6D) above, for measuring coal dust weight W or W in house steward or branch pipeA、WB、WC、
WD；
First air blower fan (4) (being existing powder processed, powder-supply system equipment), in front of coal pulverizer (2), for producing
First air, and bring the coal dust worn into an air delivery pipe, deliver to burner (7A), (7B), (7C), (7D)；
Primary air speed measuring device (11), installed in an air delivery pipe house steward (6) or each branch pipe (6A), (6B),
On (6C), (6D), for measuring air delivery pipe house steward's wind speedOr branch pipe wind speed
Secondary Air blower fan (10) (being existing powder processed, powder-supply system equipment), installed in Secondary Air air delivery pipe initiating terminal,
For producing Secondary Air and delivering to burner (7A), (7B), (7C), (7D)；
Secondary wind wind speed measurement apparatus (14), installed in Secondary Air air delivery pipe total pipeline (9) or each branch pipe(tube) (9A),
On (9B), (9C), (9D), for measuring Secondary Air air delivery pipe (9) wind speedOr
Data acquisition controller (13), for receive wind deliver coal powder Weight-measuring device (12) or (12A), (12B),
(12C), (12D) signal W or WA、WB、WC、WD, primary air speed measuring device (11) or (11A), (11B), (11C), (11D) letter
NumberOrWith secondary wind speed measurement apparatus (14) or (14A), (14B), (14C), (14D)
SignalOr
Data acquisition controller (13) is controlled according to signal and given excess air coefficient α progress equilibriums is received for powder
Air distribution is controlled by weight.
" supplying powder and by weight air distribution control device by coal dust balanced weight " is characterized in that, data acquisition controller
(13) Balance route technology is used, to WA、WB、WC、WDControl is adjusted, makes WA、WB、 WC、WDIt is consistent.
" supplying powder and by weight air distribution control device by coal dust balanced weight " is characterized in that, data acquisition controller
(13), according to coal dust gross weight W and given excess air coefficient α, calculate and secondary needed for W match somebody with somebody air quantityWithAnd according toControl is adjusted to Secondary Air rotation speed of fan, to increase or decrease V2, make V2WithIt is consistent.
" supplying powder and by weight air distribution control device by coal dust balanced weight " is characterized in that, data acquisition controller
(13) coal dust weight summation W (W=W after each pipeline equilibrium are calculatedA+WB+WC+WD), and given excess air coefficient α, calculate W
It is required secondary with air quantityWithFoundationControl is adjusted to Secondary Air rotation speed of fan, to increase
Add deduct few V2, make V2WithIt is consistent.
" supplying powder and by weight air distribution control device by coal dust balanced weight ", it is characterised in that also adjusted including a wind speed
Regulating device (15), install Secondary Air send between total pipeline (9) and bypass line (9A), (9B), (9C), (9D), for adjust into
Enter wind speed in each bypass line of Secondary Air Namely adjust air quantity V corresponding thereto2A、
V2B、V3C、V4D。
" supplying powder and by weight air distribution control device by coal dust balanced weight ", it is characterised in that data acquisition controller
(13), using Balance route technology, control signal is sent to wind-speed adjusting device (15), adjustedMakeIt is consistent.
" supplying powder and by weight air distribution control device by coal dust balanced weight ", it is characterised in that the Balance route technology
It is：Data acquisition controller (13) is calculatedOr
With WIt is flatOr V2 is flatAs setting controlling value, Δ W is calculatedA=WIt is flat-WA, Δ WB=WIt is flat-WB, Δ WC=WIt is flat-WC, Δ WD=WIt is flat-WDOr
ΔV2A=V2 is flat- V2A, Δ V2B=V2 is flat-V2B, Δ V2C=V2 is flat-V2C, Δ V2D=V2 is flat-V2D；According to Δ WA、ΔWB、 ΔWC、ΔWD
Control signal is sent to pulverized coal distributor (5), makes WA、WB、WC、WDWith WIt is flatIt is consistent；Or according to Δ V2A、ΔV2B、ΔV2C、Δ
V2DRegulation control signal is sent to wind-speed adjusting device (15), makes V2A、 V2B、V2C、V2DWith V2 is flatIt is consistent.
" supplying powder and by weight air distribution control device by coal dust balanced weight ", it is characterised in that data acquisition controller root
After equilibrium, each branch road coal dust weight sum W (W=W of First airA+WB+WC+WD) and it is balanced after each branch road air quantity of Secondary Air it
And V2(V2=VA+VB+VC+VD), and excess air coefficient α is given, the Secondary Air needed for calculating W values matches somebody with somebody air quantityWith its differenceAnd withSecondary Air rotation speed of fan is adjusted, V is increased or decreased2, make V2WithIt is consistent.
Current wind powder weight measurements of delivering coal mainly have：Ionization radiation method, heat balance method of, energy method, light-electro-detection
Method, capacitance method, microwave method, capacitance chromatography imaging method, laser method, electrostatic induction method etc., control device apoplexy of the present invention are delivered coal powder
Any wind that the above method may be selected in Weight-measuring device is delivered coal powder Weight-measuring device.
" balanced by weight for powder and air distribution device by weight ", it is characterised in that " wind deliver coal powder Weight-measuring device "
(12) it is that ionising radiation formula wind delivers coal powder Weight-measuring device or heat balance method of wind is delivered coal powder Weight-measuring device, or energy
Amount method wind is delivered coal powder measurement apparatus, or optical-electronic detection method wind is delivered coal powder Weight-measuring device, or capacitance method wind is delivered coal powder
Measurement apparatus, or capacitance chromatography imaging method wind are delivered coal powder Weight-measuring device, or microwave method wind is delivered coal powder weight measurement dress
Put, or laser method wind is delivered coal powder Weight-measuring device, or electrostatic induction method wind is delivered coal powder Weight-measuring device.
" supplying powder and by weight air distribution control device by coal dust balanced weight ", it is characterised in that primary air speed measuring device
It is differential pressure type wind speed measuring device backrest tubular type wind speed measuring device or flute-form wind with secondary wind speed measurement apparatus
Speed measuring device, or wing type wind speed measuring device, or double-venturi tubular type wind speed measuring device.
A kind of control method of " supplying powder and by weight air distribution control device by coal dust balanced weight ", it is characterised in that bag
Include following steps：
Step 1, data acquisition, data acquisition controller gathers following signal：
(1) coal dust weight signal W or WA、WB、WC、WD；
(2) primary air velocity signalOr
(3) secondary wind speed signalOr
Step 2, equilibrium supplies powder, and data acquisition controller (13) uses Balance route technology, pulverized coal distributor (5) is entered
Row regulation control, makes WA、WB、WC、WDIt is consistent；
Step 3, judge whether to also need to air distribution control
NO --- return
Yes --- carry out air distribution control
Step 4, air distribution is controlled by weight
Step 4.1 carries out air distribution control by coal dust gross weight
Data acquisition controller (13), according to gross weight W and given α values, calculates and matches somebody with somebody air quantity required for WAnd it is poor
ValueAnd pressControl is adjusted to overfire air fan, makes V2WithIt is consistent；
Step 4.2 is by balanced for the control of powder weight air distribution
Data acquisition controller (13), according to W=WA+WB+WC+WDWith given side reaction coefficient, W is calculated required with air quantity
And differenceAnd pressControl is adjusted to Secondary Air blower fan, makes V2WithIt is consistent；
Step 4.3 presses balanced coal dust weight and balanced secondary air flow carries out air distribution control
Data acquisition controller (13) utilizes Balance route technology, and pulverized coal distributor (5) is controlled, makes WA、WB、
WC、WDIt is consistent；Using Balance route technology, wind-speed adjusting device (15) is controlled, makes V2A、V2B、V2C、V2DXiang Yi
Cause, and calculate W=WA+WB+WC+WDAnd V2=V2A+V2B+V2C+V2D, according to W and α, needed for calculating WWithAnd pressSecondary Air blower fan is controlled, makes V2WithIt is consistent.
Brief description of the drawings
Fig. 1 mono- layers of a coal-grinding mechanism powder, powder-supply system capital equipment schematic diagram
1 --- feeder
2 --- coal pulverizer
3 --- thick, pulverized-coal collector
4 --- First air blower fan
5 --- pulverized coal distributor
6 --- First air total pipeline
6A, 6B, 6C, 6D --- First air bypass line
7A, 7B, 7C, 7D --- burner
8 --- boiler
9 --- Secondary Air total pipeline
9A, 9B, 9C, 9D --- Secondary Air bypass line
10 --- Secondary Air blower fan
Fig. 2 (a) inventions control device installs schematic diagram on total pipeline in Fig. 1
11 --- First air wind speed measuring device
12 --- wind is delivered coal powder Weight-measuring device
13 --- data acquisition controller
14 --- secondary wind wind speed measurement apparatus
Fig. 2 (b) inventions control device installs each branch road air delivery pipe schematic diagram in Fig. 1
Fig. 3 apparatus of the present invention are installed realizes that equilibrium supplies powder, by weight air distribution schematic diagram in Fig. 1
12A, 12B, 12C, 12D --- wind are delivered coal powder Weight-measuring device
Fig. 4 control devices of the present invention are installed realizes equilibrium for powder, balanced air feed and weight air distribution schematic diagram in Fig. 1
14A, 14B, 14C, 14D --- secondary wind wind speed measurement apparatus
15 --- wind-speed adjusting device
Fig. 5 is controlled and air distribution control method block diagram by weight by coal dust balanced weight for powder
Embodiment
Technical scheme and implementation are further described below with reference to accompanying drawing：
Fig. 1 is one layer of a coal-grinding mechanism powder, powder-supply system capital equipment schematic diagram.Fig. 2 (a), Fig. 2 (b), Fig. 3, Fig. 4
It is the different device that control device of the present invention is included when completing different task, schematic diagram in Fig. 1 is installed.This will again
Illustrate, the equipment or measurement apparatus included by control device of the present invention are complete together with existing powder processed, the equipment of powder-supply system
Into powder and air distribution task is supplied, the device that control device of the present invention should include is existing in Fig. 1, in force may not be used
Set up again.
Fig. 2 (a) wind delivers coal powder Weight-measuring device (12) on air delivery pipe total pipeline (6), is sent for measuring wind
Pipeline (6) coal dust gross weight W, wind speed measuring device (11) is arranged on air delivery pipe (6), for measuring wind speedCount according to this
Calculate air quantityd1--- First air send pipe diameter, and wind send speed measuring device (14) to measure Secondary Air and sent
Air velocity ductAir output is calculated according to thisd2--- Secondary Air send pipe diameter；Fig. 2 (b) wind is sent
Coal dust Weight-measuring device (12A), (12B), (12C), (12D) be arranged on bypass line (6A), (6B), (6C), on (6D),
For measuring each bypass line coal dust weight WA、WB、WC、WD, wind speed measuring device (11A), (11B), (11C), (11D) also pacify
On bypass line (6A), (6B), (6C), (6D), for measuringAnd calculate W=WA+
WB+WC+WDAnd V1=V1A+V1B+V1C+V1D, Fig. 2 (a), Fig. 2 (b) data acquisition controller are according to W and excess air coefficient α
Calculate needed for W secondary matches somebody with somebody air quantityWithAnd pressSecondary Air blower fan is entered
Row regulation control, makes V2WithIt is consistent.
Fig. 2 (a), Fig. 2 (b) embodiment are to complete air distribution control by coal dust gross weight, so as to realize coal dust gross weight
Consistent with excess air α with the ratio between secondary air distribution total amount, its weak point is, each bypass line coal dust weight of First air with
Each branch road of Secondary Air differs larger with each other with the ratio between air quantity, influences burning quality.
Fig. 3 embodiments, being completed for task is：
(1) realize that coal dust balanced weight supplies powder；
(2) air distribution control is carried out according to balanced coal dust weight.
The program supplies powder due to equilibrium, makes WA、WB、WC、WDIt is consistent, thus reduce each bypass line coal dust weight with
Each branch road improves each branch road air distribution quality with the difference between the ratio between air quantity, the program be the present invention preferred scheme it
One.
Fig. 4 embodiments are balanced for powder and balanced air feed and weight air distribution control program, and each branch road of First air can be achieved
Coal dust weight is consistent, and each branch road wind supply quantity of Secondary Air is consistent, and the weight of each branch road is with the air distribution with air quantity than also phase one
Cause, and the air distribution is more consistent than with given excess air coefficient α.The embodiment is optimum implementation.
During Fig. 5 is the block diagram of control method of the present invention, figure：
Step 1,2,3 are to complete coal dust balanced weight to control for powder；Step 1,2,3,4.1 are completed by coal dust gross weight W
Carry out air distribution control；Step 1,2,3,4.2 are to complete balanced for powder and by the control of coal dust weight air distribution；Step 1,2,3,4.3 are
Complete balanced for powder, balanced air feed and by the control of coal dust weight air distribution.
It is of the invention that with uniform for powder, air feed is uniform compared with existing powder processed, powder-supply system, each branch road coal dust weight with
It is consistent with the ratio between air quantity, and the ratio is consistent with given excess air coefficient, so as to reach that boiler coal-ash burning is in center
Flame stabilization, thermic load, uniformity of temperature profile, coal dust firing are in abundant, efficient optimum state, improve the thermal efficiency, reduce
Flue gas thermal losses, reduces fluff pulp, is that enterprise brings considerable economic benefit and social benefit.
The control device of the present invention can complete independently：
1st, coal dust balanced weight is controlled for powder；
2nd, controlled by coal dust weight air distribution；
3rd, equilibrium is for powder control, balanced air feed control and air distribution control by weight.
Function above controls to belong to the protection domain of this patent.
Claims (11)
1. a kind of equilibrium by weight supplies powder and by weight air distribution control device, installed in existing coal-burning boiler powder, powder-supply system
In, it is technically characterized in that, including：
Wind is delivered coal powder Weight-measuring device (12) or (12A), (12B), (12C), (12D), installed in an air delivery pipe house steward
(6) or branch pipe (6A), (6B), (6C), (6D) above, for measuring coal dust weight W or W in house steward or branch pipeA、WB、WC、WD；
First air blower fan (4) (being existing coal dust preparation system equipment), in front of coal pulverizer (2), for producing First air,
And bring the coal dust worn into an air delivery pipe, deliver to burner (7A), (7B), (7C), (7D)；
Primary air speed measuring device (11), installed in an air delivery pipe house steward (6) or each branch pipe (6A), (6B), (6C), (6D)
On, for measuring air delivery pipe house steward's wind speed ν1Or branch pipe wind speed ν1A、ν1B、ν1C、ν1D；
Secondary Air blower fan (10) (being existing coal dust preparation system equipment), installed in Secondary Air air delivery pipe initiating terminal, for producing
Raw Secondary Air simultaneously delivers to burner (7A), (7B), (7C), (7D)；
Secondary wind wind speed measurement apparatus, installed in Secondary Air air delivery pipe total pipeline (9) or each branch pipe(tube) (9A), (9B), (9C),
On (9D), for measuring Secondary Air air delivery pipe (9) wind speed ν2Or each bypass line ν2A、ν2B、ν2C、ν2D；
Data acquisition controller (13), for receive wind deliver coal powder Weight-measuring device 12 or 12A, 12B, 12C, 12D signal W or
WA、WB、WC、WD, primary air speed measuring device (11) or (11A), (11B), (11C), (11D) signal ν1Or ν1A、ν1B、ν1C、ν1D、
With secondary wind speed measurement apparatus (14) or (14A), (14B), (14C), (14D) signal ν2Or ν2A、ν2B、ν2C、ν2D；
Data acquisition controller (13) carries out equilibrium for powder control and by weight according to signal and given excess air coefficient α is received
Measure air distribution control.
2. according to claim 1, supply powder and by weight air distribution control device by coal dust balanced weight, it is characterised in that number
Balance route technology is used according to acquisition controller (13), to WA、WB、WC、WDControl is adjusted, makes WA、WB、WC、WDIt is consistent.
3. according to claim 1, supply powder and by weight air distribution control device by coal dust balanced weight, it is characterised in that number
According to acquisition controller (13), according to coal dust gross weight W and given excess air coefficient α, calculate and secondary needed for W match somebody with somebody air quantity
WithAnd according toControl is adjusted to overfire air fan rotating speed, to increase or decrease V2, make V2WithIt is consistent.
4. according to claim 1, supply powder and by weight air distribution control device by coal dust balanced weight, it is characterised in that number
Coal dust weight summation W (W after each pipeline equilibrium are calculated according to acquisition controller (13)A+WB+WC+WD), and according to W and given surplus
It is secondary needed for air coefficient α calculating W to match somebody with somebody air quantityWithFoundationOverfire air fan rotating speed is adjusted
Section control, to increase or decrease V2, make V2WithIt is consistent.
5. according to claim 1, supply powder and by weight air distribution control device by coal dust balanced weight, it is characterised in that also
Including a wind-speed adjusting device (15), install Secondary Air send total pipeline (9) and bypass line (9A), (9B), (9C), (9D) it
Between, enter wind speed ν in each branch pipe(tube) for adjusting2A、ν2B、ν2C、ν2DThat is, adjust air quantity V corresponding thereto2A、V2B、
V2C、V2D。
6. according to claim 1,5, powder and by weight air distribution control device are supplied by coal dust balanced weight, it is characterised in that
Data acquisition controller (13) uses Balance route technology, and control signal is sent to wind-speed adjusting device (15), adjusts ν2A、ν2B、
ν2C、ν2DMake air quantity V2A、V2B、V2C、V2DIt is consistent.
7. according to claim 1,2,6, powder and by weight air distribution control device are supplied by coal dust balanced weight, its feature exists
In the Balance route technology is：Data acquisition controller (13) is calculatedOrWith WIt is flatOr V2 is flatAs setting controlling value, Δ W is calculatedA=WIt is flat-WA, Δ WB=WIt is flat-WB,
ΔWC=WIt is flat-WC, Δ WD=WIt is flat-WDOr Δ V2A=V2 is flat-V2A, Δ V2B=V2 is flat-V2B, Δ V2C=V2 is flat-V2C, Δ V2D=V2 is flat-V2D；
According to Δ WA、ΔWB、ΔWC、ΔWDRegulation control signal is sent to pulverized coal distributor (5), makes WA、WB、WC、WDWith WIt is flatIt is consistent；
Or according to Δ V2A、ΔV2B、ΔV2C、ΔV2DControl signal is sent to wind-speed adjusting device (15), makes V2A、V2B、V2C、V2DWith V2 is flat
It is consistent.
8. according to claim 1,2,6, powder and by weight air distribution control device are supplied by coal dust balanced weight, its feature exists
In data acquisition controller (13), according to each road coal dust weight sum W (W=W of First air after equilibriumA+WB+WC+WD), it is balanced after
Each branch road of Secondary Air matches somebody with somebody air quantity sum V2(V2=V2A+V2B+V2C+V2D) and give excess air coefficient α, calculate two needed for W values
Secondary wind matches somebody with somebody air quantityWith its differenceAnd withSecondary Air rotation speed of fan is adjusted, V is increased or decreased2,
Make V2WithIt is consistent.
9. according to claim 1, balanced by weight for powder and air distribution device by weight, it is characterised in that " wind is delivered coal powder weight
Measuring device " (12) is that ionising radiation formula wind is delivered coal powder Weight-measuring device, or heat balance method of wind is delivered coal powder weight measurement
Device, or energy method wind are delivered coal powder measurement apparatus, or optical-electronic detection wind is delivered coal powder Weight-measuring device, or capacitance method
Wind is delivered coal powder measurement apparatus, or capacitance chromatography imaging method wind is delivered coal powder Weight-measuring device, or microwave method wind is delivered coal powder weight
Measuring device, or laser method wind are delivered coal powder Weight-measuring device, or electrostatic induction method wind is delivered coal powder Weight-measuring device.
10. according to claim 1, " supply powder and by weight air distribution control device by coal dust balanced weight ", it is characterised in that
Primary air speed measuring device and secondary wind speed measurement apparatus are differential pressure type wind speed measuring device or backrest tubular type measuring wind speed dress
Put or flute-form wind speed measuring device, or wing type wind speed measuring device, or double-venturi tubular type measuring wind speed dress
Put.
11. according to claim 1-10, the controlling party of " supplying powder and by weight air distribution control device by coal dust balanced weight "
Method, it is characterised in that comprise the following steps：
Step 1, data acquisition, data acquisition controller (13) gathers following signal：
(1) coal dust weight signal W or WA、WB、WC、WD；
(2) primary air velocity signal ν1Or ν1A、ν1B、ν1C、ν1D；
(3) secondary wind speed signal ν2Or ν2A、ν2B、ν2C、ν2D；
Step 2, equilibrium supplies powder, and data acquisition controller (13) uses Balance route technology, pulverized coal distributor (5) is adjusted
Control, makes WA、WB、WC、WDIt is consistent；
Step 3, judge whether to also need to air distribution control
NO --- return
Yes --- carry out air distribution control；
Step 4, air distribution is controlled by weight
Step 4.1 carries out air distribution control by coal dust gross weight
Data acquisition controller, according to gross weight W and given α values, matches somebody with somebody air quantity required for calculatingAnd differenceAnd pressControl is adjusted to Secondary Air blower fan, makes V2WithIt is consistent；
Step 4.2 is by balanced for the control of powder weight air distribution
Data acquisition controller (13), according to W=WA+WB+WC+WDWith given factor alpha, W is calculated required with air quantityAnd it is poor
ValueAnd pressControl is adjusted to Secondary Air blower fan, makes V2WithIt is consistent；
Step 4.3 presses balanced coal dust weight and balanced Secondary Air air quantity carries out air distribution control
Data acquisition controller (13) utilizes Balance route technology, and pulverized coal distributor (5) is controlled, makes WA、WB、WC、WDPhase
Unanimously；Using Balance route technology, wind-speed adjusting device (15) is controlled, makes V2A、V2B、V2C、V2DIt is consistent, and calculate
Go out W=WA+WB+WC+WDAnd V2=V2A+V2B+V2C+V2D, air quantity is matched somebody with somebody according to needed for W and α calculate WWithAnd pressControl is adjusted to Secondary Air blower fan, makes V2WithIt is consistent.
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| CN201611225253.4A CN106989412B (en) | 2016-12-28 | 2016-12-28 | Balanced powder supply and weight air distribution control device according to weight of pulverized coal and control method thereof |
| PCT/CN2017/000410 WO2018120256A1 (en) | 2016-12-28 | 2017-06-27 | Control device for supplying powder in a balanced manner according to coal dust weight and distributing air according to weight and control method therefor |
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| CN114353857A (en) * | 2020-10-13 | 2022-04-15 | 邸生才 | Wind and powder two-phase flow measuring system of wind conveying pipeline and two-phase flow control system |
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