CN106987710B - 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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- CN106987710B CN106987710B CN201710441021.0A CN201710441021A CN106987710B CN 106987710 B CN106987710 B CN 106987710B CN 201710441021 A CN201710441021 A CN 201710441021A CN 106987710 B CN106987710 B CN 106987710B
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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, the method includes：Drying grate and rotary kiln are respectively divided into several sections, obtain the temperature and pressure of drying grate and each section of rotary kiln, wherein the pressure that each section of drying grate includes each section of petticoat pipe pressure and air port pressure；Calculate separately drying grate and each section of pressure difference of adjacent two sections of the temperature difference of rotary kiln and drying grate and rotary kiln pressure difference, wherein, each section of pressure difference of drying grate is the difference of the petticoat pipe pressure and air port pressure of each section of drying grate, and rotary kiln pressure difference is the difference of rotary kiln end and the pressure of kiln tail；Obtain all temperature difference and the corresponding logic judgment value of pressure difference；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 prompted.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-controls of pelletizing production technique
Method and device.
Background technology
The production process of pelletizing be by iron ore concentrate, bentonite (such as bentonite) and water by machine-shaping be 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 targets such as performance and shape need.There are mainly two types of pelletizing production techniques：Shaft furnace process and chain are combed
Machine-rotary kiln technology, wherein grate kiln technique, can be very well since pellet quality that it is produced is good, intensity is high
Meet the requirement of large blast furnace production, and have the advantages that it is low etc. to the adaptable of raw material, energy consumption and production cost, gradually at
For the main production of China's pellet production.
Currently, as shown in Figure 1, grate kiln technique mainly has three big equipment：Drying grate 01, rotary kiln 02 and ring
Cold 03 is integrally covered with petticoat pipe 04 on drying grate 01, and petticoat pipe 04 plays the role 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 several bellows；Exhaust fan is arranged in 01 bottom of drying grate,
Drying grate 01 is connected to exhaust fan, and exhaust fan is connected to bellows；Drying grate 01 is connected to the kiln tail of rotary kiln 02, the kiln of rotary kiln
Head is provided with mobile burner 021.After the qualified green-ball that upper track technique makes enters drying grate 01, it is evenly distributed on drying grate 01
In grate, the exhaust fan in 01 bottom of drying grate is set, hot wind is pumped into drying grate 01, from top to bottom to green-ball be dried
And preheating, the exhaust gas after dry and preheating import bellows total pipeline and are diffused through processing.When green-ball reaches certain intensity and temperature
When from rotary kiln enter rotary kiln, the flame that mobile burner 021 sprays carries out oxidizing roasting to green-ball, is unloaded after roasting
Enter the cooling of ring cold machine 03, to obtain pelletizing.Because rotary kiln is the high temperature oxidation roasting stage, the originals such as green pellet cracking in roasting process
Because having powder accumulation on rotary kiln inner wall, the long-term overbaking of these powder can cure hardened formation ring formation.Currently, usually
Peep-hole is set in rotary kiln, artificial range estimation judges on rotary kiln inner wall whether ring formation and to carry out process.
But manually estimated by peep-hole judge on rotary kiln inner wall whether ring formation method it is inaccurate, when finding back
When having ring formation on rotary kiln inner wall, ring formation at this time can only shut down rotary kiln often than more serious, carry out taking off block processing, from
And substantially reduce the production efficiency of pelletizing.Therefore, there is an urgent need to a kind of online pre-control methods, are carried out to pelletizing production technique pre-
Control, prevents ring formation serious and the production efficiency caused by processing that stops production reduces.
Invention content
The present invention provides a kind of online pre-control method of pelletizing production technique and devices, to solve the above technical problems.
The present invention provides a kind of online pre-control method of pelletizing production technique, the method includes：
Drying grate and rotary kiln are respectively divided into several sections, obtain the temperature and pressure of the drying grate and each section of rotary kiln
By force, wherein the pressure of each section of the drying grate includes each section of petticoat pipe pressure and air port pressure；
Drying grate and each section of pressure difference of adjacent two sections of the temperature difference of rotary kiln and drying grate and rotary kiln pressure difference are calculated separately,
In, each section of pressure difference of the drying grate is the difference of the petticoat pipe pressure and air port pressure of each section of drying grate, 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 the corresponding logic judgment value of pressure difference；
According to all logic judgment values, findings data is calculated, wherein the findings data is A and fiducial temperature weight
The sum of products of product and B and preset pressure weight, A are the sum of the logic judgment value of all temperature difference, and B is patrolling for all pressure differences
Collect the sum of judgment value；
According to the findings data and all logic judgment values, adjustment pelletizing production technique or cleaning ring formation are prompted.
Preferably, described that drying grate and rotary kiln are respectively divided into several sections, it obtains the drying grate and rotary kiln is each
Section temperature and pressure 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；
It measures respectively in first dryer section, the second dryer section, the first preheating section, the second preheating section, kiln tail, kiln and kiln
The temperature of head and the petticoat pipe pressure and wind of first dryer section, the second dryer section, the first preheating section, each section of the second preheating section
The pressure of mouth pressure and the kiln tail and kiln hood.
Preferably, all temperature difference of the acquisition and the corresponding logic judgment value of pressure difference, including：
The percentage that all temperature difference exceed corresponding fiducial temperature threshold value respectively is calculated separately, the drying grate is calculated separately
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, obtains all temperature difference and pressure difference is corresponding
The logic judgment value.
Preferably, described according to preset percentage judgment rule and all percentages, obtain all temperature difference and pressure
The corresponding logic judgment value of difference, including：
If the percentage is in the first preset percentage range, 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 range, the logic of the temperature difference or pressure difference corresponding to the percentage
Judgment value is 1；
If the percentage is in third preset percentage range, 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 range, 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 range, the logic of the temperature difference or pressure difference corresponding to the percentage
Judgment value is 50.
Preferably, described according to the findings data and all logic judgment values, adjust pelletizing production technique or cleaning knot
Circle, including：
The logic judgment maximum value of the logic judgment maximum value and rotary kiln of drying grate is obtained respectively；
If the findings data is zero, prompt technique normal；
If the findings data determines the logic judgment maximum value of the drying grate and returns in default minimum deviation range
Higher value in the logic judgment maximum value of rotary kiln；
If the higher value is the logic judgment maximum value of the drying grate, raising green-ball is prompted to fall by force；
If the higher value is the logic judgment maximum value of the rotary kiln, cloth material reducing raising is prompted to fall strong；
If the findings data in default small deviation range, prompts that flame circle clearly and cloth material reducing raising is pulled to fall
By force；
If the findings data in default relatively large deviation range, prompts that the clear circle of flame strength and checking material reducing is pulled to improve
It falls strong；
If the findings data in default very big deviation range, carries out alarm and prompt blowing-out stops material and pulls flame strength
Clear circle.
The present invention also provides a kind of online pre-control device of pelletizing production technique, described device includes：Industrial personal computer, several thermometrics
Device, pressure gauge and the PLC system being 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, is divided in advance along pelletizing process flow direction inside rotary kiln
In dry section；
The pressure gauge is separately positioned on several sections of correspondences that the drying grate divides in advance along pelletizing process flow direction
Grate on the upside of and several sections of corresponding grates being divided in advance along pelletizing process flow direction of the drying grate on the downside of, 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 is 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 correspond on the drying grate inner wall on the upside of grate.
Preferably, the temperature measuring equipment of the drying grate is separately positioned on drying grate and is 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 correspond on the drying grate inner wall on the downside of grate.
Preferably, the pressure gauge of the rotary kiln is separately positioned on kiln hood and kiln tail and the drying grate interface.
Technical solution provided by the invention can include the following benefits：
A kind of online pre-control method of pelletizing production technique of present invention offer and device, the method includes：By drying grate and
Rotary kiln is respectively divided into several 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 separately drying grate and adjacent two sections of the temperature difference of rotary kiln with
And each section of pressure difference of drying grate and rotary kiln pressure difference, wherein each section of pressure difference of the drying grate be each section of drying grate petticoat pipe pressure with
The difference of air port pressure, the rotary kiln pressure difference are the difference of the rotary kiln end and the pressure of kiln tail；Obtain all temperature difference and pressure
The corresponding logic judgment value of difference；According to all logic judgment values, calculate findings data, wherein the findings data be A with
The sum of products of the product and B and preset pressure weight of fiducial temperature weight, A are the sum of the logic judgment value of all temperature difference, B
For the sum of the logic judgment value of all pressure differences；According to the findings data and all logic judgment values, adjustment pelletizing production is prompted
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 drying grate and adjacent two sections of the temperature difference of rotary kiln and each section of drying grate
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, quick, accurate judgement ring formation of rotary kiln state and trend, and then adjustment pelletizing production technique prevents ring formation, when
When 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, take off block processing without halt production, fundamentally solve ring formation of rotary kiln pre-control and ask
Topic then meets grate-kiln pelletizing production Effec-tive Function demand.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
It can the limitation present invention.
Description of the drawings
In order to illustrate more clearly of technical scheme of the present invention, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structural schematic diagram for grate kiln process equipment that the prior art provides；
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 obtaining logic judgment value provided in an embodiment of the present invention；
Fig. 5 is a kind of plan structure signal of pelletizing production technique provided in an embodiment of the present invention pre- prosecutor device online
Figure；
Fig. 6 is a kind of drying grate internal cross section structural schematic diagram provided in an embodiment of the present invention.
Specific implementation mode
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 to produce 600000 tons of pellets per year, and design feature is suitable for magnetic iron ore and bloodstone, based on bloodstone.Produce pelletizing
Fine powder warehouse and stock ground (pouring into fine powder warehouse) are stored into factory with Iron concentrate, in use, entering to match from fine powder binning by driving grab bucket
Expect ore storage bin；Bentonite is in tank car Geldart-D particle to bentonite storehouse.By rational proportion, using automatic weight dispensing.Batch passes through
Dry mixing, then by moistening levigate mill after, pelletizing room blending bunker is transported to by rubber conveyer, it is raw by disc balling machine pelletizing
Ball warp yaw belt, big ball roll screen, the screening of bead roll screen；Underproof green-ball is sifted out, and pelletizing is returned to；Qualified green-ball is equal
On even cloth to chain grate machine, after drying, preheating, through shovel flitch, slips hopper and enter in rotary kiln, ring is discharged into after oxidized roasting
Cold cools down, and being delivered to finished product screen through sealing-tape machine after cooling sieves, and the screenings less than 5mm is transported to as pellet screening by automobile
It is sintered stock ground, finished ball is transported to finished bin by belt and is used for blast furnace.What is further illustrated the present invention below in conjunction with the accompanying drawings is specific
Embodiment.
The embodiment of the present invention provides a kind of online pre-control method of pelletizing production technique, as shown in Fig. 2, the method includes：
Step S100：Drying grate and rotary kiln are respectively divided into several sections, obtain the drying grate and each section of rotary kiln
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, the specific implementation mode of step S100 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,
Rotary kiln is divided into kiln tail, kiln and kiln hood, wherein described along ball by the second dryer section, the first preheating section and the second preheating section
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 of kiln hood and first dryer section, the second dryer section, the first preheating section, each section of the second preheating section
The pressure of petticoat pipe pressure and air port pressure and the kiln tail and kiln hood.
In specific implementation process, first dryer section, the second dryer section, the first preheating section, the second preheating section, kiln
It is indicated 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, each section of the second preheating section petticoat pipe pressure indicated successively with PY1, PY2, PY3, PY4, the first dryer section, second
Dryer section, the first preheating section, each section of the second preheating section air port pressure indicated successively with PF1, PF2, PF3, PF4, kiln tail and
The pressure of kiln hood is indicated 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, and in specific implementation process, user can be according to actual conditions point
It is other that several sections are divided into drying grate and rotary kiln, it is not specifically limited herein.
Step S200：Calculate separately drying grate and each section of pressure difference of adjacent two sections of the temperature difference of rotary kiln and drying grate and revolution
Furnace pressure is poor.
In embodiments of the present invention, each section of pressure difference of the drying grate be each section of drying grate petticoat pipe pressure and air port pressure it
Difference, the rotary kiln pressure difference are 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
Rotary kiln is divided into kiln tail, kiln and in the case of kiln hood, drying grate by two dryer sections, the first preheating section and the second preheating section
Two sections of the temperature difference adjacent with rotary kiln 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 dry temperature difference T1 is T2-T1；Drying and preheating temperature difference T2 is
T3-T2, preheating temperature difference T3 are T4-T3, and kiln tail temperature difference T4 is T5-T4, and temperature difference T5 is T6-T5 in 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 the corresponding logic judgment value of pressure difference.
The corresponding logic judgment value of all temperature difference and pressure difference obtained in obtaining step S200.
In a kind of possible embodiment, as shown in figure 4, the specific implementation mode of step S300, including：
Step S310：The percentage that all temperature difference exceed corresponding fiducial temperature threshold value respectively is calculated separately, is calculated separately
Percentage and the rotary kiln pressure difference of each section of pressure difference of the drying grate beyond default drying grate threshold pressure differential, which exceed, to be preset back
The percentage of rotary kiln threshold pressure differential.
In a kind of possible application scenarios, temperature of each section will control respectively when 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, it is arbitrary that Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, which can be arranged, according to actual conditions in user
Numerical value is not specifically limited herein.
Drying percentage B1s of the temperature difference T1 beyond default dry temperature difference threshold Y1 is
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
Percentage B5s of the temperature difference T5 beyond temperature difference threshold Y5 in default kiln is 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.
It is described according to preset percentage judgment rule and the percentage in a kind of possible embodiment, it obtains
The logic judgment value, including：
Step S321：If the percentage in the first preset percentage range, 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 the corresponding temperature difference or pressure difference is 0.
Step S322：If the percentage in the second preset percentage range, 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%], when percentage in above-mentioned B1 to B11
Than may range from the second preset percentage (0,5%] when, the logic judgment value of the corresponding temperature difference or pressure difference is 1.
Step S323：If the percentage in third preset percentage range, the temperature difference corresponding to the percentage or
The logic judgment value of pressure difference is 5.
In specific implementation process, third preset percentage may range from (5%, 10%], when hundred in above-mentioned B1 to B11
Point than may range from third preset percentage (5%, 10%] when, the logic judgment value of the corresponding temperature difference or pressure difference is 5.
Step S324：If the percentage in the 4th preset percentage range, 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 in above-mentioned B1 to B11
Percentage may range from the 4th preset percentage (10%, 30%] when, the logic judgment value of the corresponding temperature difference or pressure difference
It is 9.
Step S325：If the percentage in the 5th preset percentage range, 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 hundred in above-mentioned B1 to B11
Point than may range from the 5th preset percentage [130%, ∞) when, the logic judgment value of the corresponding temperature difference or pressure difference is
50。
Certainly, in specific implementation process, above-mentioned first preset percentage range, the second preset percentage range, third
Preset percentage range, the 4th preset percentage range and the 5th preset percentage range are preference data range, Yong Huke
It is set according to actual conditions the first preset percentage range, the second preset percentage range, third preset percentage range, the 4th
Preset percentage range and the 5th preset percentage ranging from 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 that the product of A and fiducial temperature weight and B are weighed with preset pressure
The sum of products of weight, A are the sum of the logic judgment value of all temperature difference, and B is the sum of the logic judgment value 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 when kiln hood, findings data be A ×
W1+B × W2, wherein A=L1+L2+L3+L4+L5+L6, B=L7+L8+L9+L10+L11, W1 are 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, drying 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 roasting Magnetite Pellets, fiducial temperature weight can be 3, preset pressure weight
Can be 5；When roasting hematite pellets, fiducial temperature weight can be that 4, preset pressure weight can be 6.Certainly, having
In body implementation process, it is default temperature when roasting Magnetite Pellets that fiducial temperature weight, which can be able to be 5 for 3, preset pressure weight,
The preference data of poor weight and preset pressure weight, it is roasting that fiducial temperature weight, which can be able to be 6 for 4, preset pressure weight,
The preference data of fiducial temperature weight and preset pressure weight, user may be set according to actual conditions default when hematite pellets
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 prompted
Ring formation.
In a kind of possible embodiment, the specific implementation mode of step S500, including：
Step S510：The logic judgment maximum value of the logic judgment maximum value and rotary kiln of drying grate is obtained respectively.
In specific implementation process, the logic judgment value of the drying grate all temperature difference and pressure difference is compared, patrolling for drying grate is obtained
It collects and judges maximum value；The logic judgment value for comparing the rotary kiln all temperature difference and pressure difference, obtains the logic judgment maximum value of rotary kiln.
Step S520：If the findings data is zero, prompt technique normal.
In specific implementation process, if the calculated findings datas of step S400 are zero, industrial personal computer prompts technique normal.
Step S530：If the findings data determines the logic judgment of the drying grate in default minimum deviation range
Higher value in maximum value and the logic judgment maximum value of rotary kiln.
In specific implementation process, preset minimum deviation range can be (0,10], when findings data (0,10] when, it is right
Than the logic judgment maximum value of drying grate and the logic judgment maximum value of rotary kiln, the higher value in the two is obtained.
Step S540：If the higher value is the logic judgment maximum value of the drying grate, raising green-ball is prompted to fall by force.
If the higher value obtained in step S530 is the logic judgment maximum value of the drying grate, it is identified as drying grate section ginseng
Number is abnormal, then prompts raising green-ball to fall by force, prevent the reasons such as green pellet cracking in roasting process from causing powder in rotary kiln inner wall heap
Product forms ring formation.
In specific implementation process, all green-ball raw materials mix in blending bunker, and circle is fed by belt feeder batcher
Disk pelletizer, pelletizer rotation, mixture are rolled in disk through balling-up of dripping, and are adjusted amount of water, are adjusted discharge quantity, increase swelling
Soil can be improved green-ball with dosage and fall by force.
Step S550：If the higher value is the logic judgment maximum value of the rotary kiln, cloth material reducing is prompted to improve
It falls strong.
If the higher value obtained in step S530 is the logic judgment maximum value of the rotary kiln, it is identified as rotary kiln parameter
It is abnormal, then it prompts prompt cloth material reducing raising to fall strong, i.e., is improved and fallen by force 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 in default small deviation range, prompts that flame circle and cloth clearly is pulled to subtract
Material, which improves, to be fallen by force.
In specific implementation process, default small deviation may range from (10,50], when findings data (10,50] when,
It is abnormal to be identified as grate kiln end parameter, prompts that clear enclose of flame is pulled to fall strong, i.e. one side drawing with cloth material reducing raising
On the other hand dynamic scafing ring formation of rotary kiln improves green-ball by cloth material reducing and falls by force, prevents green-ball in follow-up roasting process
The reasons such as explosion cause powder to accumulate to form ring formation in rotary kiln inner wall.
Step S570：If the findings data in default relatively large deviation range, prompts that flame strength is pulled to enclose and subtract clearly
Wind material reducing raising falls 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, prompt the clear circle of flame strength and checking material reducing raising is pulled to fall it is strong, i.e.,
On the one hand it pulls flame strength to remove rotary kiln inner wall ring formation, green-ball is on the other hand improved by way of checking material reducing and is fallen by force.
In embodiments of the present invention, the clear circle of flame strength is pulled to pull mobile burner, its flame point is made to be pulled back and forth at ring formation position,
So that ring formation is interacted by hot and cold alternation, and then crack and fall off, achievees the purpose that strength is enclosed clearly.
Step S580：If the findings data in default very big deviation range, carries out alarm and prompt blowing-out stops material and draws
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
It encloses, then carries out alarm and prompt 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 several 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；Calculate separately drying grate and adjacent two sections of the temperature difference of rotary kiln and chain
Each section of pressure difference of comb machine and rotary kiln pressure difference, wherein each section of pressure difference of the drying grate is petticoat pipe pressure and the air port of each section of drying grate
The difference of pressure, the rotary kiln pressure difference are 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 and presets
The sum of products of the product and B and preset pressure weight of temperature difference weight, A are the sum of the logic judgment value of all temperature difference, and B is institute
There is the sum of the logic judgment value of pressure difference；According to the findings data and all logic judgment values, adjustment pelletizing production technique is prompted
Or cleaning ring formation.By the temperature and pressure of each section of on-line measurement drying grate and rotary kiln, calculates 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, quick, accurate judgement ring formation of rotary kiln
State and trend propose reasonable Pre-control measures, and then prevent ring formation, when judging ring formation, clear up ring formation.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 takes off block processing without halt production, and revolution formation rings in a kiln is eliminated in reply processing in time, fundamentally solves ring formation of rotary kiln pre-control
Problem then meets grate-kiln pelletizing production Effec-tive Function demand.
Based on identical technical solution, the embodiment of the present invention also provides a kind of online pre-control device of pelletizing production technique, such as
Fig. 5 and Fig. 6, described device include：Industrial personal computer 9, several 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 personal computer 9, wherein
The temperature measuring equipment is separately positioned on drying grate 01, is divided in advance along pelletizing process flow direction inside rotary kiln 02
Several sections in.In a kind of application scenarios, along pelletizing process flow direction, drying grate 01 is divided into the first dryer section 1,
Rotary kiln 02 is divided into kiln tail 5, kiln 6 and kiln hood 7 by two dryer sections 2, the first preheating section 3 and the second preheating section 4.
In the first possible embodiment, the first dryer section 1, the second dryer section 2, the preheating of the first preheating section 3 and second
Section 4 corresponds to and the first temperature measuring equipment 11, the second temperature measuring equipment 21, third is respectively set on 01 inner wall of drying grate on the upside of grate 011
Temperature measuring equipment 31 and the 4th temperature measuring equipment 41, wherein the first temperature measuring equipment 11, the second temperature measuring equipment 21, third temperature measuring equipment 31
It is respectively used to measure the first dryer section 1, the second dryer section 2, the first preheating section 3 and the second preheating section 4 with the 4th temperature measuring equipment 41
Petticoat pipe temperature.
In kiln tail 5, kiln 6 and 7 corresponding rotary kiln of kiln hood, 02 inner wall on be respectively set the 5th temperature measuring equipment the 51, the 6th survey
Warm device 61 and the 7th temperature measuring equipment 71, 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 7 temperature of kiln hood in kiln.
In second of possible embodiment, the first temperature measuring equipment 11, the second temperature measuring equipment 21,31 and of third temperature measuring equipment
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 01 inner wall of drying grate of 011 downside of corresponding grate, the first dryer section 1, the second dryer section 2, first are measured for being respectively used to
The box temperature of preheating section 3 and the second preheating section 4.
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 personal computer 9 by PLC system 8, and industrial personal computer 9 carries out analyzing processing to the data of acquisition.
Drying grate 01 is on the upside of several sections of corresponding grates 011 that pelletizing process flow direction divides in advance and described
011 downside of several sections of corresponding grates that drying grate is divided in advance along pelletizing process flow direction and the rotary kiln 02
A pressure gauge is respectively arranged in kiln hood 7 and kiln tail 6.
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 011 upside drying grate inner wall of the first 1 corresponding grate of dryer section
First pressure meter 12 is set, second pressure meter 13 is set on 011 downside side drying grate inner wall of the first 1 corresponding grate of dryer section,
First pressure meter 12 is used to measure the petticoat pipe pressure of the first dryer section 1, and second pressure meter 13 is used to measure the wind of the first dryer section 1
Mouth pressure；Third pressure gauge 22 is set on second 2 corresponding grate of dryer section, 011 upside drying grate inner wall, and the second dryer section 2 is right
4th pressure gauge 23 is set on the 011 downside side drying grate inner wall of grate answered, and third pressure gauge 22 is for measuring the second dryer section 2
Petticoat pipe pressure, the 4th pressure gauge 23 is used to measure the air port pressure of the second dryer section 2；First preheating section, 3 corresponding grate 011
5th pressure gauge 32 is set on the drying grate inner wall of upside, is set on 011 downside side drying grate inner wall of the first 3 corresponding grate of preheating section
The 6th pressure gauge 33 is set, the 5th pressure gauge 32 is used to measure the petticoat pipe pressure of the first preheating section 3, and the 6th pressure gauge 33 is for measuring
The air port pressure of first preheating section 3；7th pressure gauge is set on 011 upside drying grate inner wall of the second 4 corresponding grate of preheating section
42, the 8th pressure gauge 43 is set on second 4 corresponding grate of preheating section, 011 downside side drying grate inner wall, 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 to measure the air port pressure of 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 corresponding 02 inner wall of rotary kiln of 01 interface of comb machine.
The pressure of all manometries is also sent to industrial personal computer 9 by PLC system 8.Industrial personal computer 9 receives institute online
After having temperature data and pressure data, analyzing processing is carried out to all data, obtains findings data, and propose according to findings data
Technique adjustment prompts, 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 personal computer, several thermometrics dress
It sets, pressure gauge and the PLC system being 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, is divided in advance along pelletizing process flow direction inside rotary kiln
In several sections；The pressure gauge is separately positioned on several sections of correspondences that the drying grate divides in advance along pelletizing process flow direction
Grate on the upside of and several sections of corresponding grates being divided in advance along pelletizing process flow direction of the drying grate on the downside of, 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 in chain
The temperature of on-line monitoring and pressure 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 personal computer carry out calculating drying grate and each section of pressure difference of adjacent two sections of the temperature difference of rotary kiln and drying grate and rotary kiln pressure difference,
By analysis, quick, accurate judgement ring formation of rotary kiln state and trend, propose reasonable Pre-control measures, fundamentally solve back
Rotary kiln ring formation pre-control problem then meets grate-kiln pelletizing production Effec-tive Function demand.
The same or similar parts between the embodiments can be referred to each other in this specification.Especially for pelletizing production
For the online pre-control device embodiment of technique, since it is substantially similar to the method embodiment, so description is fairly simple, it is related
Place 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 considering specification and putting into practice the disclosure invented here
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and includes undocumented common knowledge in the art of the invention
Or conventional techniques.The description and examples are only to be considered as illustrative, 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 (2)
1. a kind of online pre-control method of pelletizing production technique, which is characterized in that the method includes：
Drying grate and rotary kiln are respectively divided into several sections, obtain the temperature and pressure of the drying grate and each section of rotary kiln,
Wherein, the pressure of each section of the drying grate includes each section of petticoat pipe pressure and air port pressure；
Calculate separately drying grate and each section of pressure difference of adjacent two sections of the temperature difference of rotary kiln and drying grate and rotary kiln pressure difference, wherein
Each section of pressure difference of the drying grate is the difference of the petticoat pipe pressure and air port pressure of each section of drying grate, and the rotary kiln pressure difference is described returns
The difference of rotary kiln kiln hood and the pressure of kiln tail；
The percentage that all temperature difference exceed corresponding fiducial temperature threshold value respectively is calculated separately, each section of the drying grate is calculated separately
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；
If the percentage is in the first preset percentage range, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
Value is 0；
If the percentage is in the second preset percentage range, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
Value is 1；
If the percentage is in third preset percentage range, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
Value is 5；
If the percentage is in the 4th preset percentage range, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
Value is 9；
If the percentage is in the 5th preset percentage range, the logic judgment of the temperature difference or pressure difference corresponding to the percentage
Value is 50；
According to all logic judgment values, findings data is calculated, wherein the findings data is the product of A and fiducial temperature weight
And the sum of products of B and preset pressure weight, A are the sum of the logic judgment value of all temperature difference, B is that the logic of all pressure differences is sentenced
The sum of disconnected value；
The logic judgment maximum value of the logic judgment maximum value and rotary kiln of drying grate is obtained respectively；
If the findings data is zero, prompt technique normal；
If the findings data determines the logic judgment maximum value and rotary kiln of the drying grate in default minimum deviation range
Logic judgment maximum value in higher value；
If the higher value is the logic judgment maximum value of the drying grate, raising green-ball is prompted to fall by force；
If the higher value is the logic judgment maximum value of the rotary kiln, cloth material reducing raising is prompted to fall strong；
If the findings data prompts pulling flame circle clearly and cloth material reducing raising to fall by force in default small deviation range；
If the findings data in default relatively large deviation range, prompts that the clear circle of flame strength and checking material reducing raising is pulled to fall
By force；
If the findings data in default very big deviation range, carries out alarm and prompt blowing-out stops material and pulls flame strength clear
Circle.
2. the method as described in claim 1, which is characterized in that it is described that drying grate and rotary kiln are respectively divided into several sections,
The temperature and pressure for obtaining the drying grate and each section of rotary kiln include：
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；
It measures 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 pressure of the kiln tail and kiln hood.
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| CN115236984A (en) * | 2022-07-25 | 2022-10-25 | 北京佰能盈天科技股份有限公司 | Pellet rotary kiln temperature control method and device |
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