CN107327865B - It is windy to send pipeline powder coal weight or heat balance powder supply control system and control method - Google Patents
It is windy to send pipeline powder coal weight or heat balance powder supply control system and control method Download PDFInfo
- Publication number
- CN107327865B CN107327865B CN201610268236.2A CN201610268236A CN107327865B CN 107327865 B CN107327865 B CN 107327865B CN 201610268236 A CN201610268236 A CN 201610268236A CN 107327865 B CN107327865 B CN 107327865B
- Authority
- CN
- China
- Prior art keywords
- coal
- weight
- coal dust
- delivery pipe
- air delivery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- 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
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
Abstract
The invention discloses " windy to send pipeline powder coal weight or heat balance powder supply control system and control method ".The control system is made of multiple air delivery pipe coal dust weight measurement instrument, raw coal calorific value on-line measurement instrument, weighing device, adjustable pulverized coal distributor and data acquisition process controller；The control system is mounted in existing coal dust preparation system equipment, is adjusted and is controlled for measuring multiple air delivery pipe coal dust weight or thermal excursion, and to coal dust weight in each air delivery pipe or heat, and realization is windy to send pipeline powder coal weight or heat balance powder supply.Using the system and control method, boiler coal-ash burning quality can be improved, improve the thermal efficiency, reduce NOxDischarge amount, it is significant to boiler operatiopn stability, safety, economy.
Description
Technical field
Pipeline powder coal weight or thermal excursion on-line measurement, in particular to multiple air delivery pipe coals are sent the present invention relates to windy
Powder weight or heat balance powder supply and control.
Background technique
Coal-burning boiler, electric power coal-burning boiler, big thermoelecrtic boiler, cement kiln etc., all using coal dust as fuel, especially
It is that large-scale power boiler generallys use multilayer, more coal-grinding mechanism powder powder supplies, a usual large-sized boiler has three layers to six layers, often
Layer drives four air delivery pipe powder supplies with a coal pulverizer, and the air delivery pipe of general powder supply has 20 or so.Due to multilayer and together
Layer air delivery pipe coal dust weight or thermal excursion it is excessive, cause flame of centre deflection in furnace, thus cause thermic load in burner hearth,
Temperature deviation is big, is unevenly distributed, water-cooling wall hot-spot, high temperature corrosion aggravation, eventually lead to burning decline, the thermal efficiency it is low, row
High-volume increase, will cause flame impingement furnace wall, slagging when serious, or even the accidents such as plugging, booster occur.For many years, wind send pipe
Road coal dust weight or calorimetry and multiple air delivery pipe coal dust weight or heat balance powder supply are constantly subjected to related skill both at home and abroad
Art personnel concern.Since the later period eighties, the states such as the U.S., Japan, Britain, Germany, the former Soviet Union, Italy technical staff is adopted
With a variety of methods, the R&D work of air delivery pipe coal dust weight or Concentration Testing is carried out in succession, heat balance method of, moral such as the U.S.
Microwave method, electrostatic induction method of Britain of state etc..The scientific and technical personnel of universities and colleges, China, scientific research institutions and manufacturing enterprise's unit,
Also successively carried out corresponding R&D work, delivered many papers and article, declared several patents, and achieve it is interim at
Fruit, such as " the boiler wind powder monitoring system " of Xi'an hot working research institute, " thermal power plant's pipeline powder coal mass flow of Beijing Institute of Technology
Measuring system ", " research of Measure Method of Pulverized Coal " of North China Electric Power University etc..
Currently, measurement air delivery pipe coal dust weight or the measurement method of flow have: heat balance method of, energy method, pressure differential method,
Optical-electronic detection method, capacitance method, capacitance chromatography imaging method, laser method, radiation method, electrostatic induction method, microwave method, supercritical ultrasonics technology etc.
Deng, and the above method all has respective advantage and disadvantage.Using equipment made of the above method, have in the application of production scene each
From difficulty.
Realize it is windy send pipeline powder coal deviation of weight on-line measurement, enter each pipeline powder coal weight, each to reduce to adjust
Pipeline powder coal deviation of weight provides foundation；Also prerequisite item is created for multi-pipeline coal dust weight or the control of heat balance powder supply
Part.
In view of the above-mentioned problems, the invention discloses a kind of " windy that pipeline powder coal weight or heat balance powder supply is sent to control system
System and control method " realizes multichannel air delivery pipe coal dust weight or thermal excursion measurement and balanced powder supply control to solve
Multiple-way duct coal dust weight or heat balance powder supply are finally reached and improve burning quality, consumption reduction emission reduction, improve the steady of boiler operatiopn
Qualitative, economy and safety.
Summary of the invention
" windy to send pipeline powder coal weight or heat balance powder supply control system and control method " of the invention is applied to fire coal
The technical issues of boiler coal-ash preparation system, it is solved, is:
1, pipeline powder coal weight measurement instrument and other equipment are sent using more typhoons, constitute it is windy send pipeline powder coal weight or
Heat balance powder supply control system, to realize multichannel air delivery pipe weight or thermal excursion on-line measurement and control；
2, multi-pipeline identity measurement mathematical model is established, the difference that each transportation work style send duct survey coal dust weight is eliminated, solves
Certainly multiple-way duct coal dust deviation of weight on-line measurement problem；
3, using variable parameter control method is automatically tracked, multiple-way duct coal dust weight or heat balance powder supply are realized；
4, it using raw coal calorific value on-line measurement instrument, is installed in above run coal bin to the conveyer belt between coal pulverizer,
To entering coal pulverizer raw coal calorific value QRaw coalAnd moisture MRaw coalOn-line checking is carried out, and according to the raw coal weight given value of setting
WTo raw coalOr setting raw coal heat given value JTo raw coalSetting control is carried out to coal pulverizer raw coal weight or heat is entered；Entered according to real-time
The raw coal weight and heat of coal pulverizer calculate the calorific value Q of coal pulverizer output coal dustCoal dust, to realize each road air delivery pipe coal
The balanced powder supply of powder calorimetry and each pipeline powder coal heat.
One large electric power plant boiler usually has a coal-grinding for every layer by multilayer, more coal pulverizer multichannel air delivery pipe powder supplies
For machine band there are four air delivery pipe powder supply, each layer equipment is identical.Now stated by taking a coal pulverizer, four air delivery pipes as an example.
Fig. 1 provides one layer of coal pulverizer, four air delivery pipe coal dust preparation system capital equipment schematic diagrames.
A kind of " windy to send pipeline powder coal weight or heat balance powder supply control system ", is mounted on existing coal dust preparation system
In equipment characterized by comprising
1) more " air delivery pipe coal dust weight measurement instrument " 100A, 100B, 100C, 100D are separately mounted to air delivery pipe
On 8A, 8B, 8C, 8D, pipeline powder coal weight W is sent for measuring each transportation work stylea、Wb、Wc、Wd；
2) with the weighing device 111 of regulatory function, run coal bin is mounted on to 2 lower section of conveyer belt between coal pulverizer, is used
Enter coal pulverizer raw coal weight W in measurementRaw coal；
3) with the pulverized coal distributor 112 of regulatory function, it is mounted on that coal pulverizer is thick, behind pulverized-coal collector 6, for adjusting
Into each air delivery pipe coal dust weight Wa、Wb、Wc、Wd；
4) data acquisition process controller 113, for receive from each air delivery pipe coal dust weight measurement instrument 100A,
The coal dust weight signal W of 100B, 100C, 100Da、Wb、Wc、WdAnd the weight signal W of weighing device 111Raw coal, and to weighing device
111 and pulverized coal distributor 112 issue control signal.
Data acquisition process controller 113 is according to coal dust weight signal Wa、Wb、Wc、WdAnd setting coal dust weight given value
WTo coal dust, calculate WTo coal dustWith Wa、Wb、Wc、WdBetween respective difference DELTA WA、ΔWB、ΔWC、ΔWD, and according to respective difference DELTA
WA、ΔWB、ΔWC、ΔWDControl signal is issued to pulverized coal distributor 112, to adjust the corresponding adjusting machine of pulverized coal distributor
Structure reduces respective difference DELTA W to increase or decrease into each air delivery pipe coal dust weightA、ΔWB、ΔWC、ΔWDMake Wa、Wb、
Wc、WdWith WTo coal dustIt is consistent, realize coal dust balanced weight powder supply.
WTo coal dustCan be by boiler heat load need and determine enter coal pulverizer raw coal weight given value；It is also possible to coal-grinding
Machine exports coal dust weight WCoal dustThe average value W of value or each air delivery pipe coal dust weightIt is flat, recommend to use WTo raw coal=WIt is flat。
It is windy to send pipeline powder coal weight or heat balance powder supply control system, which is characterized in that " the air delivery pipe coal dust
Weight measurement instrument ", but the pipeline powder coal weight measurement instrument of any pattern of the above method, as radiant type coal dust weight is surveyed
Measure instrument or microwave type coal dust weight measurement instrument or electrostatic induction formula coal dust weight measurement instrument or ultrasonic type coal dust weight measurement instrument
Or differential coal dust weight measurement instrument etc..
It is windy to send pipeline powder coal weight or heat balance powder supply control system, which is characterized in that the weighing device be to
Coal machine or belted electronic balance；The pulverized coal distributor is cascade type pulverized coal distributor or coal dust propertional regulator.
It is windy to send pipeline powder coal weight or heat balance powder supply control system, which is characterized in that further include " raw coal a hair
Heat on-line measurement instrument ", is mounted on above run coal bin to coal pulverizer conveyer belt 2, for measuring into coal pulverizer raw coal calorific value QRaw coal
With raw coal moisture MRaw coal；
Data acquisition process controller 113, based on the received raw coal calorific value QRaw coal、MRaw coalWith the raw coal weight of weighing device
WRaw coalSignal, and setting raw coal weight given value WTo raw coalOr setting raw coal heat given value JIf raw coal, carried out to coal pulverizer raw coal is entered
Weight setting control or heat setting control, and calculate in coal-grinding mechanism powder time t2Raw coal heat that is interior, having in coal pulverizer
The calorific value Q of amount and raw coal weight and coal pulverizer output coal dustCoal dust
It is windy to send pipeline powder coal weight or heat balance powder supply control system, which is characterized in that data acquisition process control
Device 113 is according to the coal dust calorific value Q of acquisitionCoal dustWith the coal dust weight signal W of each air delivery pipeA, WB, Wc, WDAnd setting coal dust heat
Measure given value JTo coal dust, calculate JA=QCoal dust*WA；JB=QCoal dust*WB；JC=QCoal dust*WC；JD=QCoal dust*WD；And JTo coal dustWith JA、JB、
JC、JDBetween difference DELTA JA、ΔJB、ΔJC、ΔJD, and control signal is issued to pulverized coal distributor according to respective difference, to
The corresponding regulating mechanism of pulverized coal distributor is adjusted, to increase or decrease into the corresponding coal dust weight of each air delivery pipe, is reduced
Respective difference DELTA JA、ΔJB、ΔJC、ΔJD, make JA、JB、JC、JDWith JTo coal dustConsistent, realization is windy to send pipeline powder coal heat equal
Weigh powder supply.
It is windy to send pipeline powder coal weight or heat balance powder supply control system, which is characterized in that windy to send pipeline powder coal weight
The measurement of amount is the measurement weight mathematical model using multi-pipeline identity, and mathematical model is:
WA=K1*Wa；WB=K2*Wb；WC=K3*Wc；WD=K4*Wd；
In formula:
WA、WB、WC、WD--- identity mathematical model measures weight；
Wa、Wb、Wc、Wd--- the weight of each air delivery pipe coal dust weight measurement instrument measurement；
K1、K2、K3、K4--- identity factor
K1、K2、K3、K4It is same standard value, each road coal dust weight measurement is demarcated to obtain.
At this it should be noted that the purpose for carrying out sameization is eliminated between each air delivery pipe coal dust weight measurement instrument in measurement
Difference is unified in its measurement all in the same standard；Certainly, the difference of pipeline powder coal weight measurement is sent if there is no each transportation work style
It is different, also just it is not necessarily to sameization.
Detailed description of the invention
The existing coal dust preparation system capital equipment schematic diagram of Fig. 1；
1 --- run coal bin
2 --- conveyer belt
3 --- feeder
4 --- coal pulverizer
5 --- blower
6 --- thick, pulverized-coal collector
7 --- pulverized coal distributor
8A, 8B, 8C, 8D --- wind are delivered coal powder pipeline
9A, 9B, 9C, 9D --- burner
10 --- boiler
The existing coal dust preparation system of Fig. 2, raw coal weight, coal dust weight distribution diagram；
The existing coal dust preparation system of Fig. 3, the powder time relationship processed and weight relationships figure of coal pulverizer；
Fig. 3 (a) time chart
Fig. 3 (b) weight relationships figure
Fig. 4 is windy to send pipeline powder coal weight or heat balance powder supply control system to be mounted in coal dust preparation system equipment
Schematic diagram；
100A, 100B, 100C, 100D --- air delivery pipe coal dust weight measurement instrument
110 --- raw coal calorific value on-line measurement instrument
111 --- weighing device
112 --- pulverized coal distributor
113 --- data acquisition process controller
The adjustable pulverized coal distributor regulating mechanism schematic diagram of Fig. 5；
112A --- it adjusts and enters pipeline 8A coal dust weight WA
112B --- it adjusts and enters pipeline 8B coal dust weight WB
112C --- it adjusts and enters pipeline 8C coal dust weight Wc
112D --- it adjusts and enters pipeline 8D coal dust weight WD
Fig. 6 is windy to send pipeline powder coal balanced weight powder supply control block diagram；
Fig. 7 is windy to send pipeline powder coal heat balance powder supply control block diagram.
Specific embodiment
Present invention implementation is described further with reference to the accompanying drawing.
Fig. 1 gives a coal pulverizer, four air delivery pipes, existing coal dust preparation system capital equipment schematic diagram；
Fig. 2 gives the raw coal weight of coal dust preparation system capital equipment, coal dust weight distribution diagram；
Fig. 3 gives relational graph between the powder time chart processed of coal pulverizer and weight；
Fig. 4 is that " windy to send pipeline powder coal weight or heat balance powder supply control system " is mounted on existing coal dust preparation system
Schematic diagram in equipment.
It is windy that the equipment recommendation of pipeline powder coal weight or heat balance powder supply control system is sent to use: air delivery pipe coal dust weight
Flowmeter is radiant type coal dust weight measurement instrument；Weighing device is feeder；Pulverized coal distributor is cascade type coal powder distribation
Device；Raw coal calorific value on-line measurement instrument is radiant type raw coal calorific capacity surveying instrument；Data acquisition process controller is Industry Control
Machine.
There are two control loops for multi-pipeline coal dust weight or heat balance powder supply control system:
1) the powder supply control of multi-pipeline coal dust balanced weight is being realized in the setting control circuit for entering coal pulverizer raw coal weight or heat
When processed, its thermic load value according to needed for boiler and determine the raw coal weight values of needs as setting raw coal weight given value WTo raw coal,
Setting control is carried out to coal pulverizer raw coal weight is entered；When realizing the control of multi-pipeline coal dust heat balance powder supply, it is according to pot
The calorie value of thermic load needed for furnace is as setting raw coal heat given value JTo raw coalHeat is carried out to the raw coal heat for entering coal pulverizer
Setting control, and coal pulverizer output coal dust calorific value Q is provided in real timeCoal dust；
2) the windy control loop for sending pipeline powder coal weight or heat balance powder supply, the circuit are according to each air delivery pipe coal
Powder weight measurement WA、WB、Wc、WDOr calorimetry value JA、JB、JC、JDWith the coal dust weight given value W of settingTo coal dustOr setting coal
Powder heat given value JTo coal dustIt carries out automatically tracking variable element setting control, control method is:
1. windy send pipeline powder coal balanced weight powder supply control method:
Step 1: setting constant
Data acquisition time Δ t
Regulating time t1, t1/ Δ t=N1
Automatically track time t3, t3=Pt1=PN1, P=1,2 ... .P.
Step 2: calibration is windy to send pipeline powder coal weight measurement same COEFFICIENT K1, K2, K3, K4。
Step 3: acquiring the coal dust weight signal W of each air delivery pipe coal dust weight measurement instrumentai, Wbi, Wci, Wdi, and by same
Property mathematical model calculates:
Step 4: adjusting counter and count NiAdd 1, it may be assumed that Ni+ 1, and judge Ni+1≥N1
Ni+ 1 < N1, return step 3；
Ni+1≥N1, into next step.
Step 5: adjusting counter and count Ni" 0 " clearly.
Step 6: taking WIt is flat, enable WIt is flat=WTo coal dust。
Step 7: calculating WTo coal dustWith WA1/N1, WB1/N1, WC1/N1, WD1/N1Difference DELTA WA, Δ WB, Δ WC, Δ WD。
Step 8: according to Δ WA, Δ WB, Δ WC, Δ WDControl signal is issued to pulverized coal distributor, to adjust pulverized coal distributor
Corresponding regulating mechanism, increase or decrease each air delivery pipe enters coal dust weight WA, WB, WC, WD, reduce respective difference DELTA WA,
ΔWB, Δ WC, Δ WD, make WA, WB, WC, WDWith WTo coal dustIt is consistent.
Step 9: calculating
Step 10: automatically tracking counter and count PiAdd 1, it may be assumed that Pi+1。
Step 11: judging Pi+1≥P
Pi+ 1 < P, return step 3；
Pi+ 1 >=P, into next step.
Step 12: calculating each air delivery pipe coal dust weighed average WIt is flat
Step 13: by WIt is flatIt is stored in WIt is flatRegister replaces last time WIt is flat。
Step 14: automatically tracking counter and count Pi" 0 " clearly；
Return step 3.
It is windy that pipeline powder coal balanced weight powder supply control block diagram is sent to see Fig. 6.
2. windy send pipeline powder coal heat balance powder supply control method:
Step 1: setting constant
Data acquisition time Δ t
Regulating time t1, t1/ Δ t=N1
Automatically track time t3, t3=Pt1=PN1, P=1,2 ... .P.
Step 2: calibration is windy to send pipeline powder coal weight measurement same COEFFICIENT K1, K2, K3, K4。
Step 3: acquiring the coal dust weight signal W of each air delivery pipe coal dust weight measurement instrumentai, Wbi, Wci, WdiAnd coal pulverizer
Export coal dust calorific value QCoal dustSignal.
Step 4: it calculates:
Step 5: adjusting counter and count NiAdd 1, it may be assumed that Ni+1；
Step 6: judgement
Ni+1≥N1
Ni+ 1 < N1, return step 3；
Ni+1≥N1, into next step.
Step 7: adjusting counter and count Ni" 0 " clearly.
Step 8: taking JIt is flatValue, and enable JIt is flat=JTo coal dust。
Step 9: calculating JTo coal dustWith JA1/N1, JB1/N1, JC1/N1, JD1/N1Difference DELTA JA1, Δ JB1, Δ JC1, Δ JD1。
Step 10: according to Δ JA1, Δ JB1, Δ JC1, Δ JD1Control signal is issued to pulverized coal distributor, to adjust coal dust point
The corresponding regulating mechanism of orchestration increases or decreases into each air delivery pipe coal dust weight, reduces Δ JA, Δ JB, Δ JC, Δ JD,
Make coal dust heat J in each air delivery pipeA, JB, JC, JDWith JTo coal dustIt is consistent.
Step 11: calculating
Step 12: automatically tracking counter and count PiAdd 1, it may be assumed that Pi+1。
Step 13: judgement
Pi+1≥P
Pi+ 1 < P, return step 3；
Pi+ 1 >=P, into next step.
Step 14: automatically tracking counter and count PiReset.
Step 15: it is flat to calculate each air delivery pipe coal dust heat average value J
Step 16: by JIt is flatIt is stored in JIt is flatRegister replaces last time JIt is flat
Return step 3.
The windy control block diagram for sending pipeline powder coal heat balance powder supply control method is shown in Fig. 7.
It is noted that either balanced weight powder supply control method or heat balance powder supply control method, in its step
On can there are many combination or increase and decrease, but the basic characteristics of this control method be automatically track variable element setting control, and
And its weight or heat given value are the average value of multi-pipeline coal dust weight or heat.
One coal-burning boiler has multiple air delivery pipe powder supplies using multilayer, every layer, can be according to every layer of boiler of thermic load need
Want, each layer of coal dust heat given value of setting, using this control method realize each layer by respective coal dust heat given value into
Row heat balance powder supply reaches entire boiler and all burns by each layer institute calorific requirement powder supply of boiler, reaches entire boiler coal-ash burning
To optimum state, this will greatly improve boiler thermal efficiency, reduce discharge amount, improve boiler operatiopn stability, safety and warp
Jiization.
Claims (5)
1. one kind is windy to send pipeline powder coal weight or heat balance powder supply control system, including two technical solutions:
Technical solution one: one kind is windy to send pipeline powder coal weight or heat balance powder supply control system, is mounted on existing steam coal
In powder preparation system equipment characterized by comprising 1) multiple air delivery pipe coal dust weight measurement instrument (100A, 100B, 100C,
Air delivery pipe (8A, 8B, 8C, 8D) 100D) is separately mounted to above, for measuring coal dust weight W in each air delivery pipea、Wb、Wc、
Wd；2) have regulatory function weighing device (111), be mounted on run coal bin to coal pulverizer conveyer belt 2 lower section, for measure into
Enter the raw coal weight W of coal pulverizerRaw coal；3) there are regulatory function pulverized coal distributor (112), is mounted on that coal pulverizer is thick, pulverized-coal collector
Behind 6, enter each air delivery pipe coal dust weight W for adjustinga、Wb、Wc、Wd；4) data acquisition controller (113), for receiving
Coal dust weight signal W from each air delivery pipe coal dust weight measurement instrument (100A, 100B, 100C, 100D)a、Wb、Wc、WdAnd claim
The raw coal weight signal W of (111) is set in refittingRaw coal, and control signal is issued to weighing device (111) and pulverized coal distributor 112；Number
According to acquisition controller (113), signal carries out following calculate and control: data acquisition process controller based on the received, according to each
Air delivery pipe coal dust weight instrument weight signal Wa、Wb、Wc、Wd, calculateWith WIt is flatAs coal dust
Weight given value WTo coal dust, and calculate WIt is flatThat is WTo coal dustWith Wa、Wb、Wc、WdBetween difference DELTA WA、ΔWB、ΔWC、ΔWD, further according to
Respective difference issues control signal to pulverized coal distributor (112), to adjust the corresponding regulating mechanism of pulverized coal distributor, with
It increases or decreases into respective air delivery pipe coal dust weight, reduces respective difference DELTA WA、ΔWB、ΔWC、ΔWD, make Wa、Wb、
Wc、WdWith WIt is flatIt is consistent, realize powder supply balanced by weight；
Technical solution two: one kind is windy to send pipeline powder coal weight or heat balance powder supply control system, is mounted on existing steam coal
On powder preparation system, it is characterised in that: including 1) multiple air delivery pipe coal dust weight measurement instrument (100A, 100B, 100C, 100D)
Air delivery pipe (8A, 8B, 8C, 8D) is separately mounted to above, for measuring coal dust weight W in each air delivery pipea、Wb、Wc、Wd；2)
With regulatory function weighing device (111), be mounted on run coal bin to coal pulverizer conveyer belt 2 lower section, enter mill for measuring
The raw coal weight W of coal machineRaw coal；3) there are regulatory function pulverized coal distributor (112), is mounted on that coal pulverizer is thick, after pulverized-coal collector 6
Face enters each air delivery pipe coal dust weight W for adjustinga、Wb、Wc、Wd；4) data acquisition controller (113) are come for receiving
From the coal dust weight signal W of each air delivery pipe coal dust weight measurement instrument (100A, 100B, 100C, 100D)a、Wb、Wc、WdAnd weighing
The raw coal weight signal W of device (111)Raw coal, and control signal is issued to weighing device (111) and pulverized coal distributor 112；Data
Acquisition controller (113), signal carries out following calculate and control: data acquisition process controller based on the received, according to each wind
Send pipeline powder coal weight instrument weight signal Wa、Wb、Wc、WdAnd coal pulverizer exports coal dust calorific value signal QCoal dust, calculate each wind and send
Pipeline coal heat average value JA=Wa×QCoal dust, JB=Wb×QCoal dust, JC=Wc×QCoal dust, JD=Wd×QCoal dustAnd each air delivery pipe coal dust
Heat average value JIt is flat:Data acquisition process controller, with JIt is flatAs coal dust heat given value JTo coal dust,
Calculate JIt is flatThat is JTo coal dustWith JA、JB、JC、JDRespective difference DELTA JA、ΔJB、ΔJC、ΔJD, further according to respective difference to coal dust point
Orchestration (112) issues control signal, to adjust its corresponding regulating mechanism, increases or decreases into each air delivery pipe coal dust weight
Amount reduces Δ JA、ΔJB、ΔJC、ΔJDMake JA、JB、JC、JDWith JIt is flatIt is consistent, it realizes and presses heat balance powder supply.
2. windy according to claim 1 send pipeline powder coal weight or heat balance powder supply control system, it is characterised in that institute
Stating air delivery pipe coal dust weight measurement instrument is radiant type air delivery pipe coal dust weight measurement instrument or microwave type air delivery pipe coal dust
The differential air delivery pipe coal dust weight measurement instrument of weight measurement instrument or electrostatic induction formula air delivery pipe coal dust weight measurement
Instrument or ultrasonic type air delivery pipe coal dust weight measurement instrument.
3. requiring described windy pipeline powder coal weight or heat balance powder supply control system, feature to be sent to exist according to claim 1
In the weighing device be feeder or belted electronic balance；The pulverized coal distributor is cascade type pulverized coal distributor or coal dust
Propertional regulator.
4. windy according to claim 1 send pipeline powder coal weight or heat balance powder supply control system, it is characterised in that also
It is mounted on above run coal bin to the conveyer belt of coal pulverizer including one " raw coal calorific value on-line measurement instrument ", for measuring into coal-grinding
The calorific value Q of machine raw coalRaw coalWith raw coal moisture MRaw coal, data acquisition process controller, raw coal calorific value Q based on the receivedRaw coal、MRaw coal
With the raw coal weight W of weighing deviceRaw coalSignal, and setting raw coal weight given value WTo raw coalOr setting raw coal heat given value
JIf raw coal, weight setting control or heat setting control are carried out to coal pulverizer raw coal is entered, and calculate in coal-grinding mechanism powder time t2
It is interior, the calorific value Q for raw coal heat and raw coal weight and coal pulverizer the output coal dust having in coal pulverizerCoal dust,
5. windy according to claim 1 send pipeline powder coal weight or heat balance powder supply control system, it is characterised in that
The control method of weighing apparatus powder supply is:
1) windy to send pipeline powder coal balanced weight powder supply control method:
Step 1: setting constant；
Data acquisition time Δ t；
Regulating time t1, t1/ Δ t=N1, N1For regulating time t1The number of interior data acquisition；
Automatically track time t3,P=1,2 ... P, P are to automatically track time t3The number of interior adjusting；
Step 2: calibration is windy to send pipeline powder coal weight measurement same COEFFICIENT K1, K2, K3, K4；
Step 3: acquiring the coal dust weight signal W of each air delivery pipe coal dust weight measurement instrumentai, Wbi, Wci, Wdi, and press identity number
Model is learned to calculate:
Step 4: adjusting the counting N of counteriAdd 1, it may be assumed that Ni+ 1, and judge Ni+1≥N1
Ni+ 1 < N1, return step 3；
Ni+1≥N1, into next step；
Step 5: adjusting the counting N of counteri" 0 " clearly；
Step 6: taking WIt is flat, enable WIt is flat=WTo coal dust；
Step 7: calculating WTo coal dustWith WA1/N1, WB1/N1, WC1/N1, WD1/N1Difference DELTA WA, Δ WB, Δ WC, Δ WD；
Step 8: according to Δ WA, Δ WB, Δ WC, Δ WDControl signal is issued to pulverized coal distributor, to adjust the phase of pulverized coal distributor
Corresponding adjusting mechanism, increase or decrease each air delivery pipe enters coal dust weight WA, WB, WC, WD, reduce respective difference DELTA WA, Δ WB,
ΔWC, Δ WD, make WA, WB, WC, WDWith WTo coal dustIt is consistent；
Step 9: calculating
Step 10: automatically tracking the counting P of counteriAdd 1, it may be assumed that Pi+1；
Step 11: judging Pi+1≥P；
Pi+ 1 < P, return step 3；
Pi+ 1 >=P, into next step；
Step 12: calculating each air delivery pipe coal dust weighed average WIt is flat
Step 13: by WIt is flatIt is stored in WIt is flatRegister replaces last time WIt is flat；
Step 14: automatically tracking the counting P of counteri" 0 " clearly；
Return step 3；
It is windy that pipeline powder coal balanced weight powder supply control block diagram is sent to see Fig. 6；
2) windy to send pipeline powder coal heat balance powder supply control method:
Step 1: setting constant
Data acquisition time Δ t
Regulating time t1, t1/ Δ t=N1
Automatically track time t3,P=1,2 ... P；
Step 2: calibration is windy to send pipeline powder coal weight measurement same COEFFICIENT K1, K2, K3, K4；
Step 3: acquiring the coal dust weight signal W of each air delivery pipe coal dust weight measurement instrumentai, Wbi, Wci, WdiAnd coal pulverizer output
Coal dust calorific value QCoal dustSignal；
Step 4: it calculates:
Step 5: adjusting the counting N of counteriAdd 1, it may be assumed that Ni+1；
Step 6: judgement
Ni+1≥N1
Ni+ 1 < N1, return step 3；
Ni+1≥N1, into next step；
Step 7: adjusting the counting N of counteri" 0 " clearly；
Step 8: taking JIt is flatValue, and enable JIt is flat=JGive matchmaker's powder；
Step 9: calculating JTo coal dustWith JA1/N1, JB1/N1, JC1/N1, JD1/N1Difference DELTA JA1, Δ JB1, Δ JC1, Δ JD1；
Step 10: according to Δ JA1, Δ JB1, Δ JC1, Δ JD1Control signal is issued to pulverized coal distributor, to adjust pulverized coal distributor
Corresponding regulating mechanism increases or decreases into each air delivery pipe coal dust weight, reduces Δ JA, Δ JB, Δ JC, Δ JD, make each
Coal dust heat J in air delivery pipeA, JB, JC, JDWith JTo coal dustIt is consistent；
Step 11: calculating
Step 12: automatically tracking the counting P of counteriAdd 1, it may be assumed that Pi+1；
Step 13: judgement
Pi+1≥P
Pi+ 1 < P, return step 3；
Pi+ 1 >=P, into next step；
Step 14: automatically tracking counter P reset；
Step 15: calculating each air delivery pipe coal dust heat average value JIt is flat
Step 16: by JIt is flatIt is stored in JIt is flatRegister replaces last time JIt is flat
Return step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610268236.2A CN107327865B (en) | 2016-04-28 | 2016-04-28 | It is windy to send pipeline powder coal weight or heat balance powder supply control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610268236.2A CN107327865B (en) | 2016-04-28 | 2016-04-28 | It is windy to send pipeline powder coal weight or heat balance powder supply control system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107327865A CN107327865A (en) | 2017-11-07 |
| CN107327865B true CN107327865B (en) | 2019-08-13 |
Family
ID=60193720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610268236.2A Active CN107327865B (en) | 2016-04-28 | 2016-04-28 | It is windy to send pipeline powder coal weight or heat balance powder supply control system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107327865B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097236A (en) * | 2020-09-24 | 2020-12-18 | 尚尔发 | Automatic energy-saving control system of electrical engineering suitable for thermal power plant |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205898268U (en) * | 2015-09-30 | 2017-01-18 | 邸生才 | Radiant type wind send pipeline buggy weight measurement appearance and a plurality of pipeline balanced powder control system that supplies |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4596949B2 (en) * | 2005-03-28 | 2010-12-15 | 中国電力株式会社 | Coal-fired power plant efficiency correction method and system |
| CN101949536B (en) * | 2010-09-14 | 2013-04-10 | 广东电网公司电力科学研究院 | Balanced coal supply control device of large circulating fluidized bed boiler |
| CN103375808B (en) * | 2012-04-28 | 2015-09-30 | 邸生才 | A kind of boiler coal-ash calory burning control system and method |
| CN102853447B (en) * | 2012-05-09 | 2015-07-08 | 北京华电天仁电力控制技术有限公司 | On-line coal powder pipeline wind-powder leveling method |
| CN104724479B (en) * | 2013-12-20 | 2017-02-15 | 邸生才 | System and method for blending power heat coal |
-
2016
- 2016-04-28 CN CN201610268236.2A patent/CN107327865B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205898268U (en) * | 2015-09-30 | 2017-01-18 | 邸生才 | Radiant type wind send pipeline buggy weight measurement appearance and a plurality of pipeline balanced powder control system that supplies |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107327865A (en) | 2017-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202101268U (en) | Boiler furnace temperature field distribution control system | |
| CN103822223B (en) | Unit pulverized-coal system realizes control system and the method thereof of coal dust uniform distribution | |
| CN103375808B (en) | A kind of boiler coal-ash calory burning control system and method | |
| US20110197831A1 (en) | Pulverized Coal Burning Boiler | |
| CN101788343A (en) | Method for detecting hearth radiation energy signal and method for controlling boiler combustion by using same | |
| CN202032548U (en) | Automatic load distribution control system for boiler using main pipe system operation mode | |
| CN109442463B (en) | Coal mill coal powder fineness adjusting method | |
| CN104633765B (en) | Energy-conservation control system and method | |
| CN107327865B (en) | It is windy to send pipeline powder coal weight or heat balance powder supply control system and control method | |
| CN106556026A (en) | Air delivery pipe coal dust weight measurement instrument and multiple pipelines are balanced for powder control system | |
| CN205898268U (en) | Radiant type wind send pipeline buggy weight measurement appearance and a plurality of pipeline balanced powder control system that supplies | |
| CN105157774B (en) | A kind of pulverized coal flow on-line measurement device and measurement method | |
| CN110133007A (en) | Coal consumption on-line metering system | |
| WO2018120256A1 (en) | Control device for supplying powder in a balanced manner according to coal dust weight and distributing air according to weight and control method therefor | |
| CN103807852B (en) | The secondary-wind distributing device of pulverized-coal fired boiler and Secondary Air air distribution method | |
| CN104614024A (en) | Method and device for representing electrostatic measurement of coal powder flows of milling and conveying system of power plant | |
| CN104728854B (en) | Pulverized coal preparation system and method with air-blew pulverized coal heat measurement and control functions | |
| CN108169151A (en) | A kind of measuring method of the combustion flame radiant heat transfer amount based on spectral detection | |
| CN208635143U (en) | By coal dust balanced weight powder supply and air distribution control device by weight | |
| CN112495568B (en) | Coal mill coal type switching device and discrimination method based on specific heat change of coal | |
| CN104724479A (en) | System and method for blending power heat coal | |
| CN106989412A (en) | Powder and by weight air distribution control device and its control method are supplied by coal dust balanced weight | |
| CN204042968U (en) | Pulverized-coal fired boiler digital combustion control and optimization system | |
| CN109211964A (en) | Wind is delivered coal powder calorific value on-line measurement instrument and its measurement method | |
| CN109000763A (en) | Air delivery pipe coal dust weight measurement instrument and its measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Di Shengcai Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210527 Address after: 100037, Beijing, Xicheng District, 2 million meters in the middle of the building, 5 doors, room 402 Patentee after: Di Shengcai Patentee after: Hebei bangruida Technology Co.,Ltd. Address before: 100037, Beijing, Xicheng District, 2 million meters in the middle of the building, 5 doors, room 402 Patentee before: Di Shengcai |
|
| TR01 | Transfer of patent right |