CN106987710A - A kind of online pre-control method of pelletizing production technique and device - Google Patents
A kind of online pre-control method of pelletizing production technique and device Download PDFInfo
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- CN106987710A CN106987710A CN201710441021.0A CN201710441021A CN106987710A CN 106987710 A CN106987710 A CN 106987710A CN 201710441021 A CN201710441021 A CN 201710441021A CN 106987710 A CN106987710 A CN 106987710A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
- C22B1/205—Sintering; Agglomerating in sintering machines with movable grates regulation of the sintering process
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/216—Sintering; Agglomerating in rotary furnaces
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Abstract
The invention discloses a kind of online pre-control method of pelletizing production technique and device, methods described includes：Drying grate and rotary kiln are respectively divided into some sections, the temperature and pressure of drying grate and each section of rotary kiln is obtained, wherein, the pressure that each section of drying grate includes each section of petticoat pipe pressure and air port pressure；Each section of pressure difference of the temperature difference and drying grate and rotary kiln pressure difference of drying grate and adjacent two sections of rotary kiln are calculated respectively, wherein, each section of pressure difference of drying grate is the petticoat pipe pressure of each section of drying grate and the difference of air port pressure, and rotary kiln pressure difference is the difference of rotary kiln end and the pressure of kiln tail；Obtain all temperature difference and pressure difference distinguishes corresponding logic judgment value；According to all logic judgment values, findings data is calculated；According to the findings data and all logic judgment values, adjustment pelletizing production technique or cleaning ring formation are pointed out.The present invention can quick and precisely judge ring formation of rotary kiln state and trend, in advance prevention or treatment ring formation, meet grate-kiln pelletizing process production Effec-tive Function demand.
Description
Technical field
The present invention relates to grate kiln production pelletizing field, more particularly to a kind of online pre-control of pelletizing production technique
Method and device.
Background technology
The production process of pelletizing is that iron ore concentrate, bentonite (such as bentonite) and water are passed through into machine-shaping for spherical material,
Through high-temperature roasting by all evaporations and by Fe of the moisture in pelletizing3O4It is oxidized to Fe2O3, make up to certain physical property, change
Learn the process of the production target such as performance and shape need.Pelletizing production technique mainly has two kinds：Shaft furnace process and chain are combed
Machine-rotary kiln technology, wherein, grate kiln technique, can be very well because pellet quality that it is produced is good, intensity is high
The requirement for meeting large blast furnace production, and with to the strong adaptability of raw material, energy consumption and the low advantage of production cost, gradually into
For the main production of China's pellet production.
At present, as shown in figure 1, grate kiln technique mainly has three big equipment：Drying grate 01, rotary kiln 02 and ring
Petticoat pipe 04 is integrally covered with cold 03, drying grate 01, petticoat pipe 04 plays a part of sealed thermal insulating to drying grate 01；Drying grate 01
Both sides are respectively provided with bellows total pipeline 05, and the bellows total pipeline 05 is provided with some bellows；The bottom of drying grate 01 sets air exhauster,
Drying grate 01 is connected with air exhauster, and air exhauster is connected with bellows；Drying grate 01 is connected with the kiln tail of rotary kiln 02, the kiln of rotary kiln
Head is provided with mobile burner 021.The qualified green-ball that upper track technique makes enters after drying grate 01, is evenly distributed on drying grate 01
In grate, be arranged on the air exhauster of the bottom of drying grate 01 and hot blast be pumped into drying grate 01, from top to bottom to green-ball be dried
And preheating, dry and preheating after waste gas import bellows total pipeline through processing diffuse.When green-ball reaches certain intensity and temperature
When enter rotary kiln from rotary kiln, the flame that mobile burner 021 sprays carries out oxidizing roasting to green-ball, and roasting is unloaded after terminating
Enter central cooler 03 to cool down, so as to obtain pelletizing.Because rotary kiln is the original such as green pellet cracking in high temperature oxidation roasting stage, roasting process
Because having powder accumulation on rotary kiln inwall, the long-term overbaking of these powder can solidify hardened formation ring formation.At present, generally
Peep-hole is set in rotary kiln, artificial range estimation judges on rotary kiln inwall whether ring formation and to carry out PROCESS FOR TREATMENT.
But, manually estimated by peep-hole judge on rotary kiln inwall whether ring formation method it is inaccurate, when finding back
When having ring formation on rotary kiln inwall, ring formation often than more serious, can only now shut down rotary kiln, and block processing is taken off in progress, from
And substantially reduce the production efficiency of pelletizing.Therefore, in the urgent need to a kind of online pre-control method, pelletizing production technique is carried out pre-
Control, prevents ring formation serious and production efficiency reduction caused by the processing that stops production.
The content of the invention
The invention provides a kind of online pre-control method of pelletizing production technique and device, to solve above-mentioned technical problem.
The present invention provides a kind of online pre-control method of pelletizing production technique, and methods described includes：
Drying grate and rotary kiln are respectively divided into some sections, the temperature and pressure of the drying grate and each section of rotary kiln is obtained
By force, wherein, the pressure of each section of the drying grate includes each section of petticoat pipe pressure and air port pressure；
Each section of pressure difference of the temperature difference and drying grate and rotary kiln pressure difference of drying grate and adjacent two sections of rotary kiln are calculated respectively, its
In, described each section of pressure difference of drying grate is the petticoat pipe pressure of each section of drying grate and the difference of air port pressure, and the rotary kiln pressure difference is institute
State the difference of rotary kiln end and the pressure of kiln tail；
Obtain all temperature difference and pressure difference distinguishes corresponding logic judgment value；
According to all logic judgment values, findings data is calculated, wherein, the findings data is A and fiducial temperature weight
Product and B and the sum of products of preset pressure weight, A are the logic judgment value sum of all temperature difference, and B patrols for all pressure differences
Collect judgment value sum；
According to the findings data and all logic judgment values, adjustment pelletizing production technique or cleaning ring formation are pointed out.
Preferably, it is described that drying grate and rotary kiln are respectively divided into some sections, obtain the drying grate and rotary kiln is each
The temperature and pressure of section include：
The drying grate is divided into four sections of the first dryer section, the second dryer section, the first preheating section and the second preheating section, institute
Rotary kiln is stated to be divided into kiln tail, kiln and three sections of kiln hood；
Measure respectively in first dryer section, the second dryer section, the first preheating section, the second preheating section, kiln tail, kiln and kiln
The temperature and first dryer section, the second dryer section, the first preheating section, the petticoat pipe pressure and wind of each section of the second preheating section of head
Mouthful pressure, and the kiln tail and kiln hood pressure.
Preferably, all temperature difference of acquisition and pressure difference distinguish corresponding logic judgment value, including：
The percentage that all temperature difference exceed corresponding fiducial temperature threshold value respectively is calculated respectively, and the drying grate is calculated respectively
Each section of pressure difference exceeds the percentage of default drying grate threshold pressure differential, and the rotary kiln pressure difference exceeds default rotary kiln pressure difference threshold
The percentage of value；
According to preset percentage judgment rule and all percentages, obtain all temperature difference and pressure difference difference is corresponding
The logic judgment value.
Preferably, it is described according to preset percentage judgment rule and all percentages, obtain all temperature difference and pressure
The not corresponding logic judgment value of difference, including：
If the percentage is in the first preset percentage scope, the logic of the temperature difference or pressure difference corresponding to the percentage
Judgment value is 0；
If the percentage is in the second preset percentage scope, the logic of the temperature difference or pressure difference corresponding to the percentage
Judgment value is 1；
If the percentage is in the 3rd preset percentage scope, the logic of the temperature difference or pressure difference corresponding to the percentage
Judgment value is 5；
If the percentage is in the 4th preset percentage scope, the logic of the temperature difference or pressure difference corresponding to the percentage
Judgment value is 9；
If the percentage is in the 5th preset percentage scope, the logic of the temperature difference or pressure difference corresponding to the percentage
Judgment value is 50.
Preferably, it is described to be tied according to the findings data and all logic judgment values, adjustment pelletizing production technique or cleaning
Circle, including：
The logic judgment maximum of drying grate and the logic judgment maximum of rotary kiln are obtained respectively；
If the findings data is zero, point out technique normal；
If the findings data is in default minimum deviation range, determines the logic judgment maximum of the drying grate and return
Higher value in the logic judgment maximum of rotary kiln；
If the higher value is the logic judgment maximum of the drying grate, raising green-ball is pointed out to fall by force；
If the higher value is the logic judgment maximum of the rotary kiln, cloth material reducing is pointed out to improve strong；
If the findings data, compared with little deviation scope, is pointed out to pull flame circle and cloth material reducing clearly to improve default
By force；
If the findings data is in default relatively large deviation scope, point out to pull the clear circle of flame strength and checking material reducing to improve
Fall strong；
If the findings data is in default very big deviation range, carries out alarm and prompting blowing-out stops material and pulls flame strength
Clear circle.
The present invention also provides a kind of pelletizing production technique online pre-control device, and described device includes：Industrial computer, some thermometrics
Device, pressure gauge and the PLC system electrically connected respectively with the temperature measuring equipment, pressure gauge, wherein,
The PLC system and industry control mechatronics；
If the temperature measuring equipment is separately positioned on drying grate, divided in advance along pelletizing process flow direction inside rotary kiln
In dry section；
The pressure gauge is separately positioned on some sections of correspondences that the drying grate is divided in advance along pelletizing process flow direction
Grate on the upside of, and on the downside of some sections of corresponding grates dividing in advance along pelletizing process flow direction of the drying grate, with
And the kiln hood and kiln tail of the rotary kiln.
Preferably, the temperature measuring equipment of the drying grate is separately positioned on drying grate and divided in advance along pelletizing process flow direction
The first dryer section, the second dryer section, the first preheating section and the second preheating section correspondence grate on the upside of drying grate inwall on.
Preferably, the temperature measuring equipment of the drying grate is separately positioned on drying grate and divided in advance along pelletizing process flow direction
The first dryer section, the second dryer section, the first preheating section and the second preheating section correspondence grate on the downside of drying grate inwall on.
Preferably, the pressure gauge of the rotary kiln is separately positioned on kiln hood and kiln tail and the drying grate interface.
The technical scheme that the present invention is provided can include the following benefits：
The present invention provides a kind of online pre-control method of pelletizing production technique and device, and methods described includes：By drying grate and
Rotary kiln is respectively divided into some sections, obtains the temperature and pressure of the drying grate and each section of rotary kiln, wherein, the drying grate
Each section of pressure includes each section of petticoat pipe pressure and air port pressure；Calculate respectively the temperature difference of drying grate and adjacent two sections of rotary kiln with
And each section of pressure difference of drying grate and rotary kiln pressure difference, wherein, described each section of pressure difference of drying grate for each section of drying grate petticoat pipe pressure with
The difference of air port pressure, the rotary kiln pressure difference is the difference of the rotary kiln end and the pressure of kiln tail；Obtain all temperature difference and pressure
The not corresponding logic judgment value of difference；According to all logic judgment values, calculate findings data, wherein, the findings data be A with
The product and B of fiducial temperature weight and the sum of products of preset pressure weight, A are the logic judgment value sum of all temperature difference, B
For the logic judgment value sum of all pressure differences；According to the findings data and all logic judgment values, adjustment pelletizing production is pointed out
Technique or cleaning ring formation.The online pre-control method of pelletizing production ring formation of rotary kiln provided in an embodiment of the present invention, passes through on-line measurement
The temperature and pressure of drying grate and each section of rotary kiln, calculate the temperature difference and each section of drying grate of drying grate and adjacent two sections of rotary kiln
Pressure difference and rotary kiln pressure difference, according to logic of propositions judgment rule, calculating logic judgment value, and then calculate findings data, according to
Findings data, it is quick, accurate to judge ring formation of rotary kiln state and trend, and then adjustment pelletizing production technique prevents ring formation, when
During through ring formation, ring formation is cleared up.This convenience can quick and precisely judge ring formation of rotary kiln state and trend, in advance pre- anti-caking
Circle, can be handled when there is slight ring formation, taken off block processing without stopping production, fundamentally solved ring formation of rotary kiln pre-control and ask
Topic, then meets grate-kiln pelletizing production Effec-tive Function demand.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structural representation for grate kiln process equipment that Fig. 1 provides for prior art；
Fig. 2 is a kind of flow chart of the online pre-control method of pelletizing production technique provided in an embodiment of the present invention；
Fig. 3 is a kind of thermometric provided in an embodiment of the present invention, pressure testing method flow chart；
Fig. 4 is a kind of method flow diagram for obtaining logic judgment value provided in an embodiment of the present invention；
Fig. 5 is a kind of plan structure signal of the online pre- prosecutor device of pelletizing production technique provided in an embodiment of the present invention
Figure；
Fig. 6 is a kind of drying grate internal cross section structural representation provided in an embodiment of the present invention.
Embodiment
By taking the grate kiln of 600,000 tons of Laigang as an example, 600,000 tons of chain grate-rotary kilns are constructed and put into operation in June, 2009,
Production capacity is produces 600000 tons of pellets per year, and design feature is applied to magnetic iron ore and bloodstone, based on bloodstone.Produce pelletizing
Enter factory storage fine powder warehouse and stock ground (pouring into fine powder warehouse) with Iron concentrate, match somebody with somebody in use, being loaded by driving grab bucket from fine powder storehouse
Expect ore storage bin；Bentonite is with tank car Geldart-D particle to bentonite storehouse.By rational proportion, using automatic weight dispensing.Batch is passed through
Drying is mixed, then by moistening after levigate mill, pelletizing room blending bunker is transported to by rubber conveyer, by disc balling machine pelletizing, raw
Ball warp yaw belt, big ball roll screen, the screening of bead roll screen；Underproof green-ball is sifted out, and returns to pelletizing；Qualified green-ball is equal
On even cloth to chain grate machine, after drying, preheating, enter through shoveling flitch, slipping hopper in rotary kiln, ring is discharged into after oxidized roasting
Cold is cooled down, and finished product screen screening is delivered to through sealing-tape machine after cooling, and the screenings less than 5mm is transported to as pellet screening by automobile
Stock ground is sintered, finished ball is transported to finished bin by belt and used for blast furnace.Further illustrate that the present invention's is specific below in conjunction with the accompanying drawings
Embodiment.
The embodiment of the present invention provides a kind of online pre-control method of pelletizing production technique, as shown in Fig. 2 methods described includes：
Step S100：Drying grate and rotary kiln are respectively divided into some sections, the drying grate and each section of rotary kiln is obtained
Temperature and pressure.
In embodiments of the present invention, the pressure of each section of the drying grate includes each section of petticoat pipe pressure and air port pressure.
In a kind of possible embodiment, as shown in figure 3, step S100 embodiment includes：
Step S110：The drying grate is divided into the first dryer section, the second dryer section, the first preheating section and the second preheating
Four sections of section, the rotary kiln is divided into kiln tail, kiln and three sections of kiln hood.
In specific implementation process, can along pelletizing process flow direction by the drying grate be divided into the first dryer section,
Second dryer section, the first preheating section and the second preheating section, rotary kiln is divided into kiln tail, kiln and kiln hood, wherein, it is described along ball
Group's technological process direction is from drying grate to rotary kiln direction.
Step S120：First dryer section, the second dryer section, the first preheating section, the second preheating section, kiln are measured respectively
In tail, kiln and the temperature and first dryer section of kiln hood, the second dryer section, the first preheating section, each section of the second preheating section
Petticoat pipe pressure and air port pressure, and the kiln tail and kiln hood pressure.
In specific implementation process, first dryer section, the second dryer section, the first preheating section, the second preheating section, kiln
Represented successively with T1, T2, T3, T4, T5, T6, T7 with the temperature of kiln hood in tail, kiln, the first dryer section, the second dryer section,
One preheating section, the petticoat pipe pressure of each section of the second preheating section represents with PY1, PY2, PY3, PY4 successively, the first dryer section, second
Dryer section, the first preheating section, the air port pressure of each section of the second preheating section represents with PF1, PF2, PF3, PF4 successively, kiln tail and
The pressure of kiln hood is represented with PH1 and PH2 respectively.
It is above-mentioned that drying grate is divided into the first dryer section, the second dryer section, the first preheating section, the second preheating section, it will turn round
Kiln is divided into kiln tail, kiln and kiln hood is preferably segmented method, in specific implementation process, and user can be according to actual conditions point
It is other that some sections are divided into drying grate and rotary kiln, it is not specifically limited herein.
Step S200：Drying grate and each section of pressure difference of the temperature difference and drying grate of adjacent two sections of rotary kiln and revolution are calculated respectively
Furnace pressure is poor.
In embodiments of the present invention, each section of pressure difference of the drying grate for each section of drying grate petticoat pipe pressure and air port pressure it
Difference, the rotary kiln pressure difference is the difference of the rotary kiln end and the pressure of kiln tail.
In specific implementation process, when the drying grate is divided into the first dryer section, along pelletizing process flow direction
Two dryer sections, the first preheating section and the second preheating section, rotary kiln are divided into kiln tail, kiln and in the case of kiln hood, drying grate
Two sections adjacent with rotary kiln of the temperature difference includes：Dry temperature difference T1, drying and preheating temperature difference T2, preheating temperature difference T3, kiln tail temperature
Temperature difference T5 and kiln hood temperature difference T6 in poor Δ T4, kiln, wherein, it is T2-T1 to dry temperature difference T1；Drying and preheating temperature difference T2 is
T3-T2, preheating temperature difference T3 are T4-T3, and kiln tail temperature difference T4 is that temperature difference T5 is T6-T5 in T5-T4, kiln, and the kiln hood temperature difference is
T7-T6；Each section of pressure difference of drying grate and rotary kiln pressure difference include：First dryer section pressure differential deltap P1, the second dryer section pressure differential deltap P2,
One preheating section pressure differential deltap P3, the second preheating section pressure differential deltap P4 and rotary kiln pressure differential deltap P5, wherein, Δ P1=PY1-PF1, Δ P2=
PY2-PF2, Δ P3=PY3-PF3, Δ P4=PY4-PF4, Δ P5=PH1-PH2.
Step S300：Obtain all temperature difference and pressure difference distinguishes corresponding logic judgment value.
All temperature difference and pressure difference obtained in obtaining step S200 distinguish corresponding logic judgment value.
In a kind of possible embodiment, as shown in figure 4, step S300 embodiment, including：
Step S310：The percentage that all temperature difference exceed corresponding fiducial temperature threshold value respectively is calculated respectively, is calculated respectively
Described each section of pressure difference of drying grate exceeds the percentage of default drying grate threshold pressure differential, and the rotary kiln pressure difference is beyond presetting back
The percentage of rotary kiln threshold pressure differential.
In a kind of possible application scenarios, each section of temperature will be controlled respectively during such as roasting Magnetite Pellets：First is dry
Dry section (200 DEG C~300 DEG C), the second dryer section (350 DEG C~450 DEG C), the first preheating section (550 DEG C~650 DEG C), the second preheating
(1150~1250 DEG C) and kiln hood (1000~1100 DEG C) in section (850 DEG C~950 DEG C), kiln tail (1000~1100 DEG C), kiln.It is dry
The corresponding default dry temperature difference threshold Y1 of dry temperature difference T1 can be 150 DEG C, the corresponding default dryings of drying and preheating temperature difference T2
Fiducial temperature threshold value Y2 can be 200 DEG C, and the corresponding default preheating temperature difference threshold Y3 of preheating temperature difference T3 can be 300 DEG C, kiln
The corresponding default kiln tail temperature difference threshold Y4 of tail temperature difference T4 can be 150 DEG C, the temperature difference in the corresponding default kilns of temperature difference T5 in kiln
Threshold value Y5 can be 150 DEG C, and the corresponding default kiln hood temperature difference threshold Y6 of kiln hood temperature difference T6 can be -150 DEG C.Default drying grate
Threshold pressure differential Y7 can be -1.5kPa, and it can be -300kPa to preset rotary kiln threshold pressure differential Y8.
In specific implementation process, user can set Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8 to be any according to actual conditions
Numerical value, is not specifically limited herein.
Dry temperature difference T1 is beyond the default percentage B1 for drying temperature difference threshold Y1
The percentage B1 that drying and preheating temperature difference T2 exceeds default drying and preheating temperature difference threshold Y2 is
Preheating temperature difference T3 exceeds the default percentage B3 for preheating temperature difference threshold Y3
The percentage B4 that kiln tail temperature difference T4 exceeds default kiln tail temperature difference threshold Y4 is
Temperature difference T5 temperature difference threshold Y5 percentage B5 in default kiln are in kiln
The percentage B6 that kiln hood temperature difference T6 exceeds default kiln hood temperature difference threshold Y6 is
The percentage B7 that first dryer section pressure difference exceeds default drying grate threshold pressure differential Y7 is
The percentage B8 that second dryer section pressure differential deltap P2 exceeds default drying grate threshold pressure differential Y7 is
The percentage B9 that first preheating section pressure differential deltap P3 exceeds default drying grate threshold pressure differential Y7 is
The percentage B10 that second preheating section pressure differential deltap P4 exceeds default drying grate threshold pressure differential Y7 is
The percentage B11 that rotary kiln pressure differential deltap P5 exceeds default rotary kiln threshold pressure differential Y8 is
Step S320：According to preset percentage judgment rule and all percentages, all temperature difference and pressure difference are obtained
The corresponding logic judgment value of difference.
It is described according to preset percentage judgment rule and the percentage in a kind of possible embodiment, obtain
The logic judgment value, including：
Step S321：If the percentage is in the first preset percentage scope, the temperature difference corresponding to the percentage or
The logic judgment value of pressure difference is 0.
In specific implementation process, first preset percentage may range from 0, when above-mentioned B1, B2, B3, B4, B5,
When percentage is 0 in B6, B7, B8, B9, B10, B11, the logic judgment value of its corresponding temperature difference or pressure difference is 0.
Step S322：If the percentage is in the second preset percentage scope, the temperature difference corresponding to the percentage or
The logic judgment value of pressure difference is 1.
In specific implementation process, the second preset percentage may range from (0,5%], as above-mentioned B1 into B11 percentage
Than may range from the second preset percentage (0,5%] when, the logic judgment value of its corresponding temperature difference or pressure difference is 1.
Step S323：If the percentage is in the 3rd preset percentage scope, the temperature difference corresponding to the percentage or
The logic judgment value of pressure difference is 5.
In specific implementation process, the 3rd preset percentage may range from (5%, 10%], when above-mentioned B1 is into B11 hundred
Point than may range from the 3rd preset percentage (5%, 10%] when, the logic judgment value of its corresponding temperature difference or pressure difference is 5.
Step S324：If the percentage is in the 4th preset percentage scope, the temperature difference corresponding to the percentage or
The logic judgment value of pressure difference is 9.
In specific implementation process, the 4th preset percentage may range from (10%, 30%], when above-mentioned B1 is into B11
Percentage may range from the 4th preset percentage (10%, 30%] when, the logic judgment value of its corresponding temperature difference or pressure difference
For 9.
Step S325：If the percentage is in the 5th preset percentage scope, the temperature difference corresponding to the percentage or
The logic judgment value of pressure difference is 50.
In specific implementation process, the 5th preset percentage may range from [130%, ∞), when above-mentioned B1 is into B11 hundred
Point than may range from the 5th preset percentage [130%, ∞) when, the logic judgment value of its corresponding temperature difference or pressure difference is
50。
Certainly, in specific implementation process, above-mentioned first preset percentage scope, the second preset percentage scope, the 3rd
Preset percentage scope, the 4th preset percentage scope and the 5th preset percentage scope are preference data scope, Yong Huke
The first preset percentage scope, the second preset percentage scope, the 3rd preset percentage scope, the 4th are set according to actual conditions
Preset percentage scope and the 5th preset percentage scope are any range, are not specifically limited herein.
Step S400：According to all logic judgment values, findings data is calculated.
In embodiments of the present invention, the findings data is A and the product and B of fiducial temperature weight are weighed with preset pressure
The sum of products of weight, A is the logic judgment value sum of all temperature difference, and B is the logic judgment value sum of all pressure differences.
In specific implementation process, when the drying grate is divided into the first dryer section, along pelletizing process flow direction
Two dryer sections, the first preheating section and the second preheating section, rotary kiln are divided into kiln tail, kiln and during kiln hood, findings data be A ×
W1+B × W2, wherein, A=L1+L2+L3+L4+L5+L6, B=L7+L8+L9+L10+L11, W1 is fiducial temperature weight, and W2 is
Preset pressure weight, L1, L2, L3, L4, L5, L6, L7, L8, L9, L10 and L11 respectively are dry temperature difference T1, dried in advance
Temperature difference T5, kiln hood temperature difference T6, the first dryer section pressure difference in hot temperature difference T2, preheating temperature difference T3, kiln tail temperature difference T4, kiln
Δ P1, the second dryer section pressure differential deltap P2, the first preheating section pressure differential deltap P3, the second preheating section pressure differential deltap P4 and rotary kiln pressure differential deltap P5
Corresponding logic judgment value.
In a kind of application scenarios, when be calcined Magnetite Pellets when, fiducial temperature weight can be 3, preset pressure weight
Can be 5；When being calcined hematite pellets, fiducial temperature weight can be that 4, preset pressure weight can be 6.Certainly, in tool
In body implementation process, fiducial temperature weight can be that 3, preset pressure weight can be 5 default temperature when being roasting Magnetite Pellets
The preference data of poor weight and preset pressure weight, fiducial temperature weight can be 4, preset pressure weight can be 6 be roasting
The preference data of fiducial temperature weight and preset pressure weight during hematite pellets, user can set default according to actual conditions
Temperature difference weight and preset pressure weight are arbitrary data, are not specifically limited herein.
Step S500：According to the findings data and all logic judgment values, adjustment pelletizing production technique or cleaning are pointed out
Ring formation.
In a kind of possible embodiment, step S500 embodiment, including：
Step S510：The logic judgment maximum of drying grate and the logic judgment maximum of rotary kiln are obtained respectively.
In specific implementation process, the logic judgment value of contrast all temperature difference of drying grate and pressure difference obtains patrolling for drying grate
Collect and judge maximum；All temperature difference of rotary kiln and the logic judgment value of pressure difference are contrasted, the logic judgment maximum of rotary kiln is obtained.
Step S520：If the findings data is zero, point out technique normal.
In specific implementation process, if the findings data that step S400 is calculated is zero, industrial computer prompting technique is normal.
Step S530：If the findings data determines the logic judgment of the drying grate in default minimum deviation range
Higher value in maximum and the logic judgment maximum of rotary kiln.
In specific implementation process, preset minimum deviation range can for (0,10], when findings data (0,10] when, it is right
Than the logic judgment maximum and the logic judgment maximum of rotary kiln of drying grate, the higher value in both is obtained.
Step S540：If the higher value is the logic judgment maximum of the drying grate, raising green-ball is pointed out to fall by force.
If the higher value obtained in step S530 is the logic judgment maximum of the drying grate, drying grate section ginseng is identified as
Number is abnormal, then prompting raising green-ball falls by force, prevents that the reason such as green pellet cracking causes powder in rotary kiln inwall heap in roasting process
Product forms ring formation.
In specific implementation process, all green-ball raw materials are mixed in blending bunker, and circle is fed by belt feeder batcher
Disk pelletizer, pelletizer rotation, compound is rolled in disk through balling-up of dripping, regulation amount of water, regulation discharge quantity, increase swelling
Soil can improve green-ball with dosage and fall by force.
Step S550：If the higher value is the logic judgment maximum of the rotary kiln, cloth material reducing is pointed out to improve
Fall strong.
If the higher value obtained in step S530 is the logic judgment maximum of the rotary kiln, rotary kiln parameter is identified as
Abnormal, then prompting prompting cloth material reducing improves strong, i.e., improve strong by way of cloth material reducing.In specific implementation process
In, cloth material reducing measure includes reducing amount of water, discharge quantity, reduces disc balling machine and opens number.
Step S560：If the findings data, compared with little deviation scope, is pointed out to pull flame circle and cloth clearly to subtract default
Material raising falls by force.
In specific implementation process, it is default may range from compared with little deviation (10,50], when findings data (10,50] when,
It is identified as grate kiln end parameter abnormal, points out to pull flame circle and cloth material reducing clearly to improve strong, i.e., on the one hand draw
Dynamic scafing ring formation of rotary kiln, on the other hand improves green-ball by cloth material reducing and falls by force, prevent green-ball in follow-up roasting process
The reasons such as explosion cause powder to accumulate to form ring formation in rotary kiln inwall.
Step S570：If the findings data is in default relatively large deviation scope, point out to pull flame strength to enclose and subtract clearly
Wind material reducing improves strong.
In specific implementation process, default relatively large deviation may range from (50,100], when findings data (50,100]
When, it is abnormal to be identified as grate kiln end parameter, points out to pull the clear circle of flame strength and checking material reducing to improve strong, i.e.,
On the one hand pull flame strength to remove rotary kiln inwall ring formation, on the other hand improve green-ball by way of checking material reducing and fall by force.
In embodiments of the present invention, pull the clear circle of flame strength to pull mobile burner, its flame point is come and gone at ring formation position and pull,
Ring formation is colded and heat succeed each other interaction, and then ftracture and come off, reach the purpose that strength is enclosed clearly.
Step S580：If the findings data is in default very big deviation range, carries out alarm and prompting blowing-out stops material and drawn
The clear circle of flame strength of getting angry.
In specific implementation process, very big deviation range (100, ∞) is preset, when findings data is in default very big deviation model
Enclose, then carry out alarm and prompting blowing-out stops material and pulls the clear circle of flame strength.
The online pre-control method of pelletizing production ring formation of rotary kiln provided in an embodiment of the present invention, including：By drying grate and revolution
Kiln is respectively divided into some sections, obtains the temperature and pressure of the drying grate and each section of rotary kiln, wherein, each section of the drying grate
Pressure include each section of petticoat pipe pressure and air port pressure；The temperature difference and chain of drying grate and adjacent two sections of rotary kiln are calculated respectively
Each section of pressure difference of comb machine and rotary kiln pressure difference, wherein, petticoat pipe pressure and air port of the described each section of pressure difference of drying grate for each section of drying grate
The difference of pressure, the rotary kiln pressure difference is the difference of the rotary kiln end and the pressure of kiln tail；Obtain all temperature difference and pressure difference point
Not corresponding logic judgment value；According to all logic judgment values, findings data is calculated, wherein, the findings data is A with presetting
The product and B of temperature difference weight and the sum of products of preset pressure weight, A is the logic judgment value sum of all temperature difference, and B is institute
There is the logic judgment value sum of pressure difference；According to the findings data and all logic judgment values, adjustment pelletizing production technique is pointed out
Or cleaning ring formation.By the temperature and pressure of each section of on-line measurement drying grate and rotary kiln, calculate drying grate and rotary kiln is adjacent
Two sections each section of pressure difference of the temperature difference and drying grate and rotary kiln pressure difference, according to logic of propositions judgment rule, calculating logic judgment value,
By reasonable weight COMPREHENSIVE CALCULATING, and then findings data is calculated, according to findings data, quickly, accurately judge ring formation of rotary kiln
State and trend, propose reasonable Pre-control measures, and then prevent ring formation, and when judging ring formation, ring formation is cleared up.This
It is convenient quick and precisely to judge ring formation of rotary kiln state and trend, prevent ring formation in advance, can be located when there is slight ring formation
Reason, block processing is taken off without stopping production, and reply processing in time eliminates revolution formation rings in a kiln, fundamentally solves ring formation of rotary kiln pre-control
Problem, then meets grate-kiln pelletizing production Effec-tive Function demand.
Based on identical technical scheme, the embodiment of the present invention also provides a kind of pelletizing production technique online pre-control device, such as
Fig. 5 and Fig. 6, described device includes：Industrial computer 9, some temperature measuring equipments, pressure gauge and respectively with the temperature measuring equipment, pressure
The PCL systems 8 of electrical connection are counted, the PLC system is electrically connected with industrial computer 9, wherein,
The temperature measuring equipment is separately positioned on drying grate 01, divided in advance along pelletizing process flow direction inside rotary kiln 02
Some sections in.In a kind of application scenarios, along pelletizing process flow direction, drying grate 01 is divided into the first dryer section 1,
Two dryer sections 2, the first preheating section 3 and the second preheating section 4,6 and kiln hood 7 are divided into kiln tail 5, kiln by rotary kiln 02.
In the first possible embodiment, the first dryer section 1, the second dryer section 2, the first preheating section 3 and the second preheating
First temperature measuring equipment 11, the second temperature measuring equipment the 21, the 3rd are set respectively on the inwall of drying grate 01 of the upside of the correspondence of section 4 grate 011
The temperature measuring equipment 41 of temperature measuring equipment 31 and the 4th, wherein, the first temperature measuring equipment 11, the second temperature measuring equipment 21, the 3rd temperature measuring equipment 31
The first dryer section 1 of measurement, the second dryer section 2, the first preheating section 3 and the second preheating section 4 are respectively used to the 4th temperature measuring equipment 41
Petticoat pipe temperature.
In kiln tail 5, kiln 6 and the corresponding inwall of rotary kiln 02 of kiln hood 7 on the 5th temperature measuring equipment 51, the 6th survey are set respectively
The warm temperature measuring equipment 71 of device 61 and the 7th, the 5th temperature measuring equipment 51, the 6th temperature measuring equipment 61 and the 7th temperature measuring equipment 71 are surveyed respectively
Measure kiln tail 5,6 and the temperature of kiln hood 7 in kiln.
In second of possible embodiment, the first temperature measuring equipment 11, the second temperature measuring equipment 21, the and of the 3rd temperature measuring equipment 31
4th temperature measuring equipment 41 can be separately positioned on the first dryer section 1, the second dryer section 2, the first preheating section 3 and the second preheating section 4
On the inwall of drying grate 01 of the downside of correspondence grate 011, for being respectively used to the first dryer section 1 of measurement, the second dryer section 2, first
The box temperature of the preheating section 4 of preheating section 3 and second.
In embodiments of the present invention, all temperature measuring equipments include thermocouple temperature measurer, and all thermocouple temperature measurers are by measurement
Temperature is sent to industrial computer 9 by PLC system 8, and the data of 9 pairs of acquisitions of industrial computer are analyzed and processed.
Some sections of corresponding upsides of grate 011 that drying grate 01 is divided in advance along pelletizing process flow direction, and it is described
Some sections of corresponding downsides of grate 011 that drying grate is divided in advance along pelletizing process flow direction, and the rotary kiln 02
Kiln hood 7 and kiln tail 6 respectively set a pressure gauge.
In specific implementation process, drying grate 01 is divided into the first dryer section 1, in advance along pelletizing process flow direction
When two dryer sections 2, the first preheating section 3 and the second preheating section 4, on the corresponding upside drying grate inwall of grate 011 of the first dryer section 1
Set and second pressure meter 13 be set on first pressure meter 12, the corresponding downside side drying grate inwall of grate 011 of the first dryer section 1,
First pressure meter 12 is used for the petticoat pipe pressure for measuring the first dryer section 1, and second pressure meter 13 is used for the wind for measuring the first dryer section 1
Mouth pressure；3rd pressure gauge 22, the second 2 pairs of dryer section are set on the corresponding upside drying grate inwall of grate 011 of the second dryer section 2
4th pressure gauge 23 is set on the downside side drying grate inwall of grate 011 answered, and the 3rd pressure gauge 22 is used to measure the second dryer section 2
Petticoat pipe pressure, the 4th pressure gauge 23 be used for measure the second dryer section 2 air port pressure；The corresponding grate 011 of first preheating section 3
Set on the 5th pressure gauge 32, the corresponding downside side drying grate inwall of grate 011 of the first preheating section 3 and set on the drying grate inwall of upside
The 6th pressure gauge 33 is put, the 5th pressure gauge 32 is used for the petticoat pipe pressure for measuring the first preheating section 3, and the 6th pressure gauge 33 is used to measure
The air port pressure of first preheating section 3；7th pressure gauge is set on the corresponding upside drying grate inwall of grate 011 of the second preheating section 4
42, the 8th pressure gauge 43 is set on the corresponding downside side drying grate inwall of grate 011 of second preheating section 4, and the 7th pressure gauge 42 is used
In the petticoat pipe pressure for measuring the second preheating section 4, the 8th pressure gauge 43 is used for the air port pressure for measuring the second preheating section 4.
In specific implementation process, the pressure gauge of the rotary kiln 02 is separately positioned on kiln hood 7 and kiln tail 5 and the chain
On the corresponding inwall of rotary kiln 02 of the interface of comb machine 01.
The pressure of all manometries is also sent to industrial computer 9 by PLC system 8.Industrial computer 9 receives institute online
Have after temperature data and pressure data, all data are analyzed and processed, obtain findings data, and propose according to findings data
Technique adjustment is pointed out, and suggestion content is shown to staff by PLC system.
The online pre-control device of a kind of pelletizing production technique provided in an embodiment of the present invention, including industrial computer, some thermometrics dress
Put, pressure gauge and the PLC system electrically connected respectively with the temperature measuring equipment, pressure gauge, wherein, the PLC system and industry control
Mechatronics；The temperature measuring equipment is separately positioned on drying grate, divided in advance along pelletizing process flow direction inside rotary kiln
In some sections；The pressure gauge is separately positioned on some sections of correspondences that the drying grate is divided in advance along pelletizing process flow direction
Grate on the upside of, and on the downside of some sections of corresponding grates dividing in advance along pelletizing process flow direction of the drying grate, with
And the kiln hood and kiln tail of the rotary kiln.The online pre-control device of pelletizing production technique provided in an embodiment of the present invention, is arranged on chain
The temperature and pressure of on-line monitoring are sent to industry control by the temperature measuring equipment and pressure gauge of comb machine and each section of rotary kiln by PLC system
Machine, industrial computer calculate each section of pressure difference of the temperature difference and drying grate and rotary kiln pressure difference of drying grate and adjacent two sections of rotary kiln,
By analysis, it is quick, accurate to judge ring formation of rotary kiln state and trend, reasonable Pre-control measures are proposed, are fundamentally solved back
Rotary kiln ring formation pre-control problem, then meets grate-kiln pelletizing production Effec-tive Function demand.
Between the embodiment of each in this specification identical similar part mutually referring to.Especially for pelletizing production
For the online pre-control device embodiment of technique, because it is substantially similar to embodiment of the method, so description is fairly simple, it is related
Part is referring to the explanation in embodiment of the method.
Those skilled in the art will readily occur to its of the present invention after the disclosure that specification and practice are invented here is considered
Its embodiment.The application be intended to the present invention any modification, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (9)
1. a kind of online pre-control method of pelletizing production technique, it is characterised in that methods described includes：
Drying grate and rotary kiln are respectively divided into some sections, the temperature and pressure of the drying grate and each section of rotary kiln is obtained,
Wherein, the pressure of each section of the drying grate includes each section of petticoat pipe pressure and air port pressure；
Each section of pressure difference of the temperature difference and drying grate and rotary kiln pressure difference of drying grate and adjacent two sections of rotary kiln are calculated respectively, wherein,
Described each section of pressure difference of drying grate is the petticoat pipe pressure of each section of drying grate and the difference of air port pressure, and the rotary kiln pressure difference returns to be described
The difference of rotary kiln kiln hood and the pressure of kiln tail；
Obtain all temperature difference and pressure difference distinguishes corresponding logic judgment value；
According to all logic judgment values, findings data is calculated, wherein, the findings data is A and the product of fiducial temperature weight
And B and the sum of products of preset pressure weight, A is the logic judgment value sum of all temperature difference, and B sentences for the logic of all pressure differences
Disconnected value sum；
According to the findings data and all logic judgment values, adjustment pelletizing production technique or cleaning ring formation are pointed out.
2. the method as described in claim 1, it is characterised in that described that drying grate and rotary kiln are respectively divided into some sections,
Obtaining the temperature and pressure of the drying grate and each section of rotary kiln includes：
The drying grate is divided into four sections, described time of the first dryer section, the second dryer section, the first preheating section and the second preheating section
Rotary kiln is divided into kiln tail, kiln and three sections of kiln hood；
Measure respectively in first dryer section, the second dryer section, the first preheating section, the second preheating section, kiln tail, kiln and kiln hood
Temperature and first dryer section, the second dryer section, the first preheating section, the petticoat pipe pressure of each section of the second preheating section and air port pressure
By force, and the kiln tail and kiln hood pressure.
3. method as claimed in claim 2, it is characterised in that corresponding logic is sentenced respectively for all temperature difference of acquisition and pressure difference
Disconnected value, including：
The percentage that all temperature difference exceed corresponding fiducial temperature threshold value respectively is calculated respectively, and each section of the drying grate is calculated respectively
Pressure difference exceeds the percentage of default drying grate threshold pressure differential, and the rotary kiln pressure difference exceeds default rotary kiln threshold pressure differential
Percentage；
According to preset percentage judgment rule and all percentages, obtain all temperature difference and pressure difference difference is corresponding described
Logic judgment value.
4. method as claimed in claim 3, it is characterised in that it is described according to preset percentage judgment rule and it is all described in
Percentage, obtains all temperature difference and pressure difference distinguishes the corresponding logic judgment value, including：
If the percentage is in the first preset percentage scope, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
It is worth for 0；
If the percentage is in the second preset percentage scope, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
It is worth for 1；
If the percentage is in the 3rd preset percentage scope, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
It is worth for 5；
If the percentage is in the 4th preset percentage scope, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
It is worth for 9；
If the percentage is in the 5th preset percentage scope, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
It is worth for 50.
5. the method as described in claim 1, it is characterised in that described according to the findings data and all logic judgment values,
Prompting adjustment pelletizing production technique or cleaning ring formation, including：
The logic judgment maximum of drying grate and the logic judgment maximum of rotary kiln are obtained respectively；
If the findings data is zero, point out technique normal；
If the findings data determines the logic judgment maximum and rotary kiln of the drying grate in default minimum deviation range
Logic judgment maximum in higher value；
If the higher value is the logic judgment maximum of the drying grate, raising green-ball is pointed out to fall by force；
If the higher value is the logic judgment maximum of the rotary kiln, cloth material reducing is pointed out to improve strong；
If the findings data, compared with little deviation scope, is pointed out to pull flame circle and cloth material reducing clearly to improve strong default；
If the findings data is in default relatively large deviation scope, point out to pull the clear circle of flame strength and checking material reducing to improve
By force；
If the findings data is in default very big deviation range, carries out alarm and prompting blowing-out stops material and pulls flame strength clear
Circle.
6. a kind of online pre-control device of pelletizing production technique, it is characterised in that described device includes：Industrial computer, some thermometrics dress
Put, pressure gauge and the PLC system electrically connected respectively with the temperature measuring equipment, pressure gauge, wherein,
The PLC system and industry control mechatronics；
The temperature measuring equipment be separately positioned on drying grate, some sections divided in advance along pelletizing process flow direction inside rotary kiln
In；
The pressure gauge is separately positioned on some sections of corresponding combs that the drying grate is divided in advance along pelletizing process flow direction
Bed upside, and some sections of corresponding grates downsides that the drying grate is divided in advance along pelletizing process flow direction, Yi Jisuo
State the kiln hood and kiln tail of rotary kiln.
7. device as claimed in claim 6, it is characterised in that the temperature measuring equipment of the drying grate is separately positioned on drying grate edge
The first dryer section, the second dryer section, the first preheating section and the second preheating section correspondence that pelletizing process flow direction is divided in advance are combed
On drying grate inwall on the upside of bed.
8. device as claimed in claim 6, it is characterised in that the temperature measuring equipment of the drying grate is separately positioned on drying grate edge
The first dryer section, the second dryer section, the first preheating section and the second preheating section correspondence that pelletizing process flow direction is divided in advance are combed
On drying grate inwall on the downside of bed.
9. device as claimed in claim 6, it is characterised in that the pressure gauge of the rotary kiln is separately positioned on kiln hood and kiln
Tail and the drying grate interface.
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