CN107054911B - A kind of control system and method judged automatically and eliminate run coal bin chute blockage - Google Patents
A kind of control system and method judged automatically and eliminate run coal bin chute blockage Download PDFInfo
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- CN107054911B CN107054911B CN201710242737.8A CN201710242737A CN107054911B CN 107054911 B CN107054911 B CN 107054911B CN 201710242737 A CN201710242737 A CN 201710242737A CN 107054911 B CN107054911 B CN 107054911B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
- B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/005—Control arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/42—Devices for emptying otherwise than from the top using belt or chain conveyors
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- Mechanical Engineering (AREA)
- Control Of Conveyors (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
A kind of control system and method judged automatically and eliminate run coal bin chute blockage: being arranged when on the spot, and control device connects furnace belted electronic balance, belt speed of service sensor, coal plough position sensor, the output end of belted electronic balance and the input terminal of communication interface and compressed air big gun and warning device in 3D material scanner or continuous material level meter, Gravimetric Coal Feeders in storehouse；When being arranged in the distance, increases signal collection control cabinet on the spot and connect each equipment and sensor, and signal collection control cabinet is connected with remote control device；Control system calculates coal amount and coal position in storehouse by acquisition equipment and the measurement data of sensor, and the coal position and coal amount measured with 3D material scanner or continuous material level measurement is compared judgement chute blockage；The layering of compressed air big gun is controlled when chute blockage, and chute blockage is eliminated in starting in batches；Start warning device when can not eliminate；Control system and method provided by the invention are able to achieve judging automatically, clearing up elimination and auto-alarm function automatically for run coal bin chute blockage.
Description
Technical field
The present invention relates to thermal power generating technology field more particularly to a kind of controls judged automatically and eliminate run coal bin chute blockage
System and method.
Background technique
Raw coal bin of thermal power plant can store fire coal required for boiler combustion in a period of time, it is ensured that fuel continually and steadily supplies
Unit should be given；Run coal bin chute blockage, fluffy coal situation frequent occurrence, may cause the feeder of run coal bin outlet because disconnected coal is jumped
Lock, and then cause boiler combustion unstable, it needs largely to throw oil, reduce unit load, be also possible to cause boiler extinguishment, machine when serious
Group is shut down, and serious financial consequences are caused.
Generic hierarchical subangle is equipped with multiple groups compressed air big gun in run coal bin at present；When chute blockage occurs, start in batches
Compressed air big gun；By quickly opening the valve port of air cannon storage tank, the compressed air in tank is allowed to form the strong of high speed ejection
Air-flow, high speed impact block raw coal particle, and this expansion shock wave discharged suddenly overcomes the static friction of material and formed
Arch camber or viscous wall, while impact rapping also is formed to run coal bin inner wall, so that raw coal recovery gravity flowing in storehouse is smoothly glided,
Eliminate chute blockage；But still mostly used in current power plant in artificial observation combination micro-judgment run coal bin whether chute blockage, and on the spot or far
Journey manual control starts compressed air big gun, and special messenger's sole duty is needed to operate in this way, wastes a large amount of manpower and material resources, while judging chute blockage situation
Accuracy and eliminate chute blockage timeliness it is not high, unreasonably frequently coal can also be beaten real, aggravated using compressed air big gun
Chute blockage and fluffy coal.
Output, feeder coal amount adjuster instruction of the Ye You power plant by monitoring feeder coal conduit coal stream detector at present
And the methods of feedback deviation determines coal bunker chute blockage, and control compressed air big gun starting cleaning chute blockage on this basis, but by upper
The method of stating judges that chute blockage relatively lags, and when monitoring signals provide chute blockage signal, often chute blockage situation has compared in run coal bin
Seriously, unsatisfactory using compressed air big gun cleaning effect at this time, also it is easy to cause coal bunker to export a large amount of raw coal by compressed air
Big gun shakes off damage feeder.
Run coal bin inner top is equipped with 3D material scanner or radar, ultrasonic continuous level-sensing device, run coal bin correspond to coal plough
Equipped with position sensor, coal conveyer belt front or middle part are equipped with into furnace weighing belt, and coal conveyer belt bottom is sensed equipped with belt speed
Device, Gravimetric Coal Feeders inside are equipped with belted electronic balance；By the measurement data and sensor number that acquire these metering devices in real time
According to, research and develop it is a kind of can timely automated judgement run coal bin chute blockage and control the cleaning of compressed air big gun eliminate chute blockage control system and
Method reduces operations staff's labor intensity, reduces maintenance cost, improves the stability of power plant boiler burning and overall operation.
Summary of the invention
The object of the present invention is to provide it is a kind of can judge automatically coal chute blockage and control compressed air big gun etc. except block apparatus eliminate
The control system and method for run coal bin chute blockage.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of control system judged automatically and eliminate run coal bin chute blockage, including coal conveyer belt front is set outside run coal bin
Or middle part be used to measure coal-fired weight enter furnace belted electronic balance, the belt operation of coal conveyer belt bottom outside run coal bin is set
Velocity sensor is arranged in the position sensor for being used to measure coal plough position on coal plough, is arranged in run coal bin top position
3D material scanner or continuous material level meter, the multiple groups compressed air big gun on raw coal bulkhead is arranged in subangle by different level, setting
The warning device outside run coal bin is arranged in belted electronic balance in the Gravimetric Coal Feeders of run coal bin bottom；Control device setting
On the spot or a distant place；It is arranged when on the spot, control device passes through cable and input card and RS485 interface and communication cable side
Formula is directly connected into furnace belted electronic balance, belted electronic balance, belt speed of service sensor, 3D material scanner or continuous material level
The output end and communication interface of meter, compressed air big gun, control device are directly connected to compressed air big gun by output fastener and cable
With the input terminal of warning device；Set-up of control system in the distance when, on the spot increase signal collection control cabinet, signal collection control cabinet
Enter furnace belted electronic balance, belted electronic balance, belt speed of service sensor, 3D material scanner or continuous material by cable connection
The output end and communication interface of position meter, compressed air big gun, signal collection control cabinet are directly connected to press by output fastener and cable
The input terminal of contracting air bubble and warning device, and by fiber optic cables and photoelectric signal conversion device by signal collection control cabinet with
The control device in a distant place is connected.
Control system can be by acquiring above-mentioned each belted electronic balance, sensor, the measurement data of level-sensing device and control in real time
Compressed air big gun and warning device processed realize judging automatically, clearing up elimination and auto-alarm function automatically for run coal bin chute blockage.
It is a further object to provide a kind of control methods judged automatically and eliminate run coal bin chute blockage, including with
Lower step:
A, control device or signal collection control cabinet acquire in real time on coal conveyer belt enter furnace belted electronic balance measurement weight,
The run coal bin of position sensor measurement correspond to coal plough position data, the belted electronic balance in Gravimetric Coal Feeders measures weight, skin
The coal conveyer belt speed of service data of tape running speed sensor measurement, enter step B；
B, enter furnace belted electronic balance measurement weight, coal plough position, the coal conveyer belt speed of service according on coal conveyer belt
Data calculate coal amount of putting in storage, and enter step C；
C, the measurement weight for the belted electronic balance that coal amount is subtracted again in Gravimetric Coal Feeders of putting in storage is added according to run coal bin coal load quantity
Amount calculates coal amount in storehouse, enters step D；
D, it controls in storehouse by setting period interval and is measured based on 3D material scanner or continuous material level；It is swept according to 3D material
The measurement data for retouching instrument can obtain equivalent coal-heig ht in bunker in storehouse, and coal position is high in the storehouse that continuous material level meter can be measured directly
Degree；Enter step E；
E, judge run coal bin chute blockage situation, when chute blockage occurs in storehouse, cause to occur inside raw coal since lower coal is unsmooth swollen
Sky, while according to run coal bin coal position-coal amount curved line relation, coal-heig ht in bunker and coal measurer have one-to-one relationship in storehouse, will lead to
3D material scanner or continuous material level measurement, which measure coal-heig ht in bunker and corresponding coal amount, can be greater than the coal-heig ht in bunker being calculated
It is compared with the deviation of corresponding coal amount, coal position or coal amount that measurement is obtained and being calculated with setting value, judges storehouse
Interior chute blockage situation, is respectively as follows:
Coal position deviation judges chute blockage: calculating coal position in storehouse using coal position-coal amount curve data according to coal amount in storehouse, obtains storehouse
The indirect measurement of interior coal-heig ht in bunker；It calculates 3D material scanner or continuous material level measures coal-heig ht in bunker and meter in the storehouse measured
The deviation of coal-heig ht in bunker in obtained storehouse, deviation determine that chute blockage occurs when setting and being persistently greater than the set value in the period；
Coal amount deviation judges chute blockage: coal-heig ht in bunker benefit in the storehouse measured according to 3D material scanner or continuous material level measurement
Coal amount in storehouse is converted to coal position-coal amount curve data, obtains the measured value of coal amount in storehouse；It calculates online coal quantity measurement value and calculates
The deviation of coal amount in the storehouse arrived, deviation determine that chute blockage occurs when setting and being persistently greater than the set value in the period；
Enter step F；
F, when chute blockage occurs for judgement, according to collected compressed air big gun operating state signal, control, which is lower than, to be calculated
Storehouse in the compressed air big gun of coal-heig ht in bunker start in batches from bottom to top, block raw coal particle using compressed air high speed impact,
Chute blockage is eliminated, G is entered step；
If G, setting value is still greater than in coal position deviation or coal amount deviation after setting delay, alarm activation is controlled.
In stepb, raw coal is calculated to be transported to run coal bin from the furnace belted electronic balance that enters on coal conveyer belt and correspond to coal plough
Shipping time τ are as follows:
L is the distance for entering furnace belted electronic balance and corresponding to coal plough to run coal bin on coal conveyer belt in formula；V is coal conveyer belt
The speed of service, general coal conveyer belt runs by normal speed, when coal conveyer belt velocity sensor measured value and normal speed not
When consistent, v takes the average value of the coal conveyer belt measuring speed in setting time length；
For the maximum integer no more than τ, i.e., to the downward round numbers of shipping time τ of coal；tnCoal amount of putting in storage in period
According toPeriod andThe linear combination shape for entering furnace belted electronic balance measurement weight on period coal conveyer belt
Formula calculates:
I (t in formulan) it is tnIt puts in storage in period coal amount；Q(tn) it is tnEnter furnace belted electronic balance on coal conveyer belt in period
Measurement weight.
By entering on acquisition coal conveyer belt, furnace belted electronic balance measures weight to the present invention, run coal bin corresponds to coal plough position
Belted electronic balance measurement weight, coal conveyer belt speed of service data, 3D material scanner or company in storehouse in signal, Gravimetric Coal Feeders
Continuous level-sensing device measurement data can be realized the function that judges automatically of run coal bin chute blockage, while pass through control compressed air big gun and storehouse
Outer warning device can be realized chute blockage and clear up elimination and auto-alarm function automatically.
Detailed description of the invention
Fig. 1 is control system connection type on the spot.
Fig. 2 is tele-control system connection type.
Fig. 3 is control method flow chart.
Fig. 4 is coal position-coal amount curve graph of run coal bin.
Specific embodiment
The present invention is intended to provide a kind of control system and method, it can be according to the operation data and biography of collected relevant device
Sensor measurement data judges run coal bin chute blockage situation, starts compressed air big gun automatically when determining to occur chute blockage and eliminates chute blockage, together
When chute blockage can not be eliminated, auto-alarm function is provided.
The embodiment of control system is described further in 1,2 pair of invention with reference to the accompanying drawing.
Coal-fired to enter run coal bin by the outer coal conveyer belt of run coal bin and coal plough, coal conveyer belt front or middle part are equipped with into furnace
Belted electronic balance, coal conveyer belt bottom are equipped with belt speed of service sensor, and coal plough is equipped with position sensor；Top in run coal bin
Position has installed 3D material scanner or continuous material level meter, and subangle arranges multiple groups compressed air big gun to coal bunker wall by different level；Raw coal
Enter Gravimetric Coal Feeders from coal bunker outlet at bottom, is equipped with belted electronic balance in Gravimetric Coal Feeders；Coal bunker is externally provided with warning device；Control
System processed may be provided on the spot or a distant place.
Referring to attached drawing 1, when on the spot, control device is connect set-up of control system by cable and input card and RS485
Mouth and communication cable mode are directly connected to each belted electronic balance, sensor, level-sensing device, the output end of compressed air big gun and communication and connect
Mouthful, the input terminal of compressed air big gun and warning device is directly connected to by output fastener and cable.
Referring to attached drawing 2, set-up of control system in the distance when, increase signal collection control cabinet on the spot and be directly connected to by cable
Each belted electronic balance, sensor, level-sensing device, the output end of compressed air big gun and communication interface and compressed air big gun and alarm dress
Signal collection control cabinet is connected by the input terminal set by fiber optic cables and photoelectric signal conversion device with remote control device.
The control system can be by acquiring above-mentioned metering device and sensor measurement data in real time and controlling compressed air
Big gun and warning device realize judging automatically, clearing up elimination and auto-alarm function automatically for run coal bin chute blockage.
The embodiment of control method is described further in 3 pairs of inventions with reference to the accompanying drawing.
1, control device or signal collection control cabinet acquire in real time enters furnace belted electronic balance measurement weight, original on coal conveyer belt
Coal bunker corresponds to coal plough position signal, belted electronic balance belt measurement weight, coal conveyer belt speed of service number in Gravimetric Coal Feeders
According to setup algorithm unit interval is long.
2, coal amount of putting in storage is calculated: when detecting that the corresponding coal plough of run coal bin falls signal, at this time on coal conveyer belt
Raw coal starts to fall into coal bunker, but raw coal is transported to what coal plough position needed from furnace belted electronic balance position is entered by coal conveyer belt
Time a length of τ, then a certain period adds coal amount in storehouse to be that the furnace belted electronic balance that enters of τ time before this measures weight；Raw coal passes through
Coal conveyer belt is transported to the calculation method that run coal bin corresponds to the shipping time τ of coal plough from furnace belted electronic balance is entered are as follows:
L is the distance for entering furnace belted electronic balance and corresponding to coal plough to run coal bin on coal conveyer belt in formula；V is coal conveyer belt
The speed of service, general coal conveyer belt by normal speed run, when the measured value and normal speed of coal conveyer belt velocity sensor
When inconsistent, v takes the measurement in setting time length to obtain the average value of the belt speed of service；
Raw coal is not necessarily integer to the shipping time τ that run coal bin corresponds to coal plough from entering furnace belted electronic balance, then
Coal amount of putting in storage in a certain amount of time just contains two parts, respectivelyWithThe two adjacent time intervals enter
Respective a part of the measurement weight of furnace belted electronic balance；
For the maximum integer no more than τ, i.e., real number τ is rounded downwards；
In unit time period by enter the coal of furnace weighing belt be it is relatively uniform, can will put in storage coal amount I (tn) be expressed asWithThe two adjacent time intervals enter the linear combination of furnace belted electronic balance measurement weight:
I(tn) it is tnPeriod puts in storage coal amount；
Q(tn) it is tnPeriod enters furnace belted electronic balance measurement weight.
3, calculate coal amount in storehouse: coal amount is equal in storehouse coal load quantity and subtracts export coal amount again plus coal amount of putting in storage in storehouse, in storehouse
Coal load quantity is coal amount in the storehouse for the last period Mo that the period is calculated before；
S(tn)=S (tn-1)+I(tn)-O(tn)
I(tn) it is tnBelted electronic balance measures weight in Gravimetric Coal Feeders in period.
S(tn) it is tnCoal amount in period end storehouse.
4, coal position in storehouse is measured: according to the 3D material scanner or continuous material level of the period interval control storehouse inner top of setting
Meter measures；3D material scanner can directly measure equivalent coal-heig ht in bunker in storehouse or is calculated according to actual measurement or method of geometry
Coal bunker volume and coal position relationship raw coal shaped volumes data in storehouse that 3D material scanner measures are converted as coal equivalent in storehouse
Position height, coal-heig ht in bunker in the storehouse that radar, ultrasonic continuous level-sensing device can be measured directly, to obtain tnPeriod end storehouse
The measured value H'(t of interior coal-heig ht in bunkern)；
5, chute blockage judges in run coal bin: coal position and coal measurer have one-to-one relationship in storehouse, according to coal position-coal in run coal bin
Amount measured data or coal bunker practical structures, which calculate, can obtain coal position-coal amount curve shown in Fig. 4 and corresponding data,
Coal amount in storehouse is converted to by corresponding coal-heig ht in bunker using linear interpolation method or coal position in storehouse is converted into corresponding coal amount:
Calculate coal position in storehouse: according to coal magnitude S (t in the storehouse being calculatedn), in coal position-coal amount curved line relation data
Find minimum two o'clock section S (t belonging to the valuen)∈[Sa,Sb], coal amount section [Sa,Sb] corresponding coal-heig ht in bunker section is
[Ha,Hb]；
The section linearize and obtains coal amount S (t in the storehouse according to linear interpolationn) corresponding coal-heig ht in bunker；
H(tn) it is that t is calculatednCoal-heig ht in bunker in the storehouse of period Mo, i.e., the indirect measurement of coal-heig ht in bunker in storehouse.
The t measured is measured according to 3D material scanner or continuous material levelnCoal-heig ht in bunker H'(t in period end storehousen) calculating pair
Coal amount S'(t in the storehouse answeredn) method it is consistent with this, for avoid repeat no longer be described in detail.
When chute blockage in run coal bin, leads to occur swollen sky inside raw coal since lower coal is unsmooth, will lead to the coal being calculated
Amount and corresponding coal-heig ht in bunker are measured with 3D material scanner and continuous material level measures coal-heig ht in bunker and corresponding coal amount data go out
Existing deviation judges chute blockage situation in storehouse by the way that deviation to be compared with setting value；
Calculate tn3D material scanner or continuous material level meter Measurement of coal level H'(t in period end storehousen) and calculating coal position H (tn)
Deviation delta H (tn):
ΔH(tn)=H'(tn)-H(tn)
Or calculate tn3D material scanner or level-sensing device Measurement of coal level H'(t in period end storehousen) corresponding to coal amount S'(tn)
With calculating coal amount S (tn) deviation delta S (tn):
ΔS(tn)=S'(tn)-S(tn)
As coal position deviation delta H (tn) or coal amount deviation delta S (tn) default value is all larger than within the continuous k period, determine hair
Chute blockage is given birth to；K is the when number of segment that can be set according to live run coal bin practical operation situation；
6, eliminate chute blockage: determining in run coal bin after chute blockage, according to collected compressed air big gun operating state signal and
The coal-heig ht in bunker being calculated, control start in batches from bottom to top lower than the compressed air big gun for calculating coal-heig ht in bunker, utilize pressure
Contracting air high speed impact blocks raw coal particle, and chute blockage is eliminated in cleaning；
7, automatic alarm: if 3D material position scanner or continuous material level measure the coal-heig ht in bunker and meter measured after setting delay
The deviation or the corresponding coal amount of coal-heig ht in bunker measured value for calculating coal-heig ht in bunker are still being greater than the set value with the deviation for calculating coal amount, then are controlled
Alarm activation alarm processed.
Claims (3)
1. a kind of control system judged automatically and eliminate run coal bin chute blockage, it is characterised in that:
Including be arranged in coal conveyer belt front outside run coal bin or middle part be used to measure coal-fired weight enter furnace belted electronic balance, if
The belt speed of service sensor of the coal conveyer belt bottom outside run coal bin is set, is arranged on coal plough and is used to measure coal plough position
Position sensor, the 3D material scanner or continuous material level meter of run coal bin top position are set, by different level subangle be arranged
Multiple groups compressed air big gun on raw coal bulkhead, is arranged in the belted electronic balance in the Gravimetric Coal Feeders of run coal bin bottom, setting
Warning device outside run coal bin；Control device setting is on the spot or a distant place；Be arranged when on the spot, control device by cable and
Input card and RS485 interface and communication cable mode are directly connected into furnace belted electronic balance, belted electronic balance, belt operation
The output end and communication interface of velocity sensor, 3D material scanner or continuous material level meter, compressed air big gun, control device pass through
Output fastener and cable are directly connected to the input terminal of compressed air big gun and warning device；Set-up of control system in the distance when, on the spot
Increase signal collection control cabinet, signal collection control cabinet enters furnace belted electronic balance, belted electronic balance, belt by cable connection and transports
The output end and communication interface of row velocity sensor, 3D material scanner or continuous material level meter, compressed air big gun, signal collection control
Case processed is directly connected to the input terminal of compressed air big gun and warning device by output fastener and cable, and passes through fiber optic cables and light
Signal collection control cabinet is connected by electrical signal conversion device with the control device in a distant place.
2. the control method of the control system of run coal bin chute blockage is judged automatically and eliminated shown in claim 1, it is characterised in that: energy
It enough realizes the judging automatically of run coal bin chute blockage, eliminate automatically and auto-alarm function, method includes the following steps:
A, control device or signal collection control cabinet acquire in real time enters furnace belted electronic balance measurement weight, position on coal conveyer belt
The run coal bin of sensor measurement corresponds to coal plough position data, the belted electronic balance measurement weight in Gravimetric Coal Feeders, belt fortune
The coal conveyer belt speed of service data of scanning frequency degree sensor measurement；
B, enter furnace belted electronic balance measurement weight, coal plough position, coal conveyer belt speed of service data according on coal conveyer belt
Calculating is put in storage coal amount；
C, the measurement poidometer for the belted electronic balance that coal amount is subtracted again in Gravimetric Coal Feeders of putting in storage is added according to run coal bin coal load quantity
Calculate coal amount in storehouse；
D, it controls in storehouse by setting period interval and is measured based on 3D material scanner or continuous material level；According to 3D material scanner
Measurement data can obtain equivalent coal-heig ht in bunker in storehouse, coal-heig ht in bunker in the storehouse that continuous material level meter can be measured directly；
E, judge run coal bin chute blockage situation, when chute blockage occurs in storehouse, lead to occur swollen sky inside raw coal since lower coal is unsmooth, together
When according to run coal bin coal position-coal amount curved line relation, coal-heig ht in bunker and coal measurer have one-to-one relationship in storehouse, will lead to 3D material
Scanner or continuous material level measurement, which measure coal-heig ht in bunker and corresponding coal amount, can be greater than the coal-heig ht in bunker being calculated and correspondence
Coal amount, the deviation of coal position or coal amount that measurement is obtained and being calculated is compared with setting value, judges chute blockage in storehouse
Situation is respectively as follows:
Coal position deviation judges chute blockage: calculating coal position in storehouse using coal position-coal amount curve data according to coal amount in storehouse, obtains coal in storehouse
The indirect measurement of position height；It calculates 3D material scanner or continuous material level measures coal-heig ht in bunker in the storehouse measured and calculates
The deviation of coal-heig ht in bunker in the storehouse arrived, deviation determine that chute blockage occurs when setting and being persistently greater than the set value in the period；
Coal amount deviation judges chute blockage: coal-heig ht in bunker utilizes coal in the storehouse measured according to 3D material scanner or continuous material level measurement
Position-coal amount curve data is converted to coal amount in storehouse, obtains the measured value of coal amount in storehouse；It calculates online coal quantity measurement value and is calculated
The deviation of coal amount in storehouse, deviation determine that chute blockage occurs when setting and being persistently greater than the set value in the period；
F, when chute blockage occurs for judgement, according to collected compressed air big gun operating state signal, control is lower than the storehouse being calculated
The compressed air big gun of interior coal-heig ht in bunker starts in batches from bottom to top, blocks raw coal particle using compressed air high speed impact, eliminates
Chute blockage；
If G, setting value is still greater than in coal position deviation or coal amount deviation after setting delay, alarm activation is controlled.
3. control method according to claim 2, it is characterised in that: in stepb, calculate raw coal from coal conveyer belt
Enter furnace belted electronic balance and be transported to the shipping time τ that run coal bin corresponds to coal plough are as follows:
L is the distance for entering furnace belted electronic balance and corresponding to coal plough to run coal bin on coal conveyer belt in formula；V is the fortune of coal conveyer belt
Scanning frequency degree, general coal conveyer belt is run by normal speed, when coal conveyer belt velocity sensor measured value and normal speed are inconsistent
When, v takes the average value of the coal conveyer belt measuring speed in setting time length；
For the maximum integer no more than τ, i.e., to the downward round numbers of shipping time τ of coal；tnIn period put in storage coal amount according to
ThePeriod andThe linear combination meter for entering furnace belted electronic balance measurement weight on period coal conveyer belt
It calculates:
I (t in formulan) it is tnIt puts in storage in period coal amount；Q(tn) it is tnThe measurement for entering furnace belted electronic balance in period on coal conveyer belt
Weight.
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| CN201710242737.8A CN107054911B (en) | 2017-04-14 | 2017-04-14 | A kind of control system and method judged automatically and eliminate run coal bin chute blockage |
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| CN201710242737.8A CN107054911B (en) | 2017-04-14 | 2017-04-14 | A kind of control system and method judged automatically and eliminate run coal bin chute blockage |
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| CN107054911B true CN107054911B (en) | 2019-10-11 |
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