CN105087908B - A kind of grate kiln temprature control method and device - Google Patents
A kind of grate kiln temprature control method and device Download PDFInfo
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Abstract
The embodiments of the invention provide a kind of grate kiln temprature control method and device, wherein method includes：Obtain PH sections of petticoat pipe temperature TI_PH of drying grate, rotary kiln dump temperature TI_KN；According to TI_PH and TI_KN, given coal nozzle amount SI_Coal, given jet for gas amount SI_Gas, given central cooler speed SI_Cooler, given PH sections of exhausting electric machine frequency SI_PH are adjusted according to preset strategy.In the present invention, drying and preheating process is no longer using TPH sections of temperature as core, but around TI_PH, adjusts the temperature plateau that PH sections of temperature is conducive to DDD sections, is also beneficial to the recovery and utilization of energy.Cooling procedure is also no longer with C3 sections for core, but around TI_KN, and such C1 sections temperature is controlled in advance, is easy to the control of follow-up C2 and C3 temperature, improves C2 sections of effectiveness of regenerator, has saved the energy and resource.
Description
Technical field
The present invention relates to Grate-kiln Oxidized Pellet technique, more particularly to a kind of grate kiln temperature control
Method and device.
Background technology
In steel and iron industry, development iron ore acid pellet production technology is the development side of current optimization Bf Burden
To.Current Pelletizing Process mainly has shaft furnace process, belt type roasting machine method and grate kiln method.Drying grate therein-return
Rotary kiln method has many merits, for example：It is easy to control thermal regulation according to different material condition, and suitably reduces equipment material
Requirement；Single machine production ability is big, meets pelletizing production maximization requirement；Can be real by flue gas recirculation using coal as fuel
Existing heat energy is efficiently utilized, and meets the resources characteristic that China's natural gas is not enough, coal reserves is abundant；Roasting is uniform, and product quality is excellent
It is good.
In grate kiln method, distinguished and admirable circulation is extremely complex, in large-scale chain grate stoker-rotary system, typically will
Drying grate is divided into tetra- sections of UDD, DDD, TPH, PH, and central cooler is divided into tri- sections of C1, C2, C3, along with rotary kiln, altogether 8 sections
Need to carry out exhausting or air blast to realize that overall wind is balanced and equalized temperature, not only hop count is more, and many sections are all phases
(such as C2 sections is communicated with TPH sections by pipeline) of mutual correlation, so how each section of temperature of Collaborative Control is acid pellet control
The a great problem of technology.
In the prior art, common method is：Dry, warm is using TPH sections of temperature as core, using TPH sections of adjustment
Exhausting frequency is means, if TPH sections of temperature cross the blow rate required that higher position increases C2 sections of cold wind；Cooling procedure with C3 sections for core,
If C3 sections of outlets namely central cooler outlet temperature cross higher position and open big cold wind valve, increase cooling air quantity, or go out in central cooler
Sprinkled water on mouth discharging belt.But inventor has found during the present invention is realized, although these methods can be solved quickly
The warm body occurred in production, but resource, the loss of energy are easily caused, also it is unfavorable for the steady of process.
The content of the invention
To overcome problem present in correlation technique, the present invention provide a kind of grate kiln temprature control method and
Device, to reduce the water resource waste in production process and the loss of energy.
There is provided a kind of grate kiln temprature control method, methods described for first aspect according to embodiments of the present invention
Including：
Obtain PH sections of petticoat pipe temperature TI_PH of drying grate, rotary kiln dump temperature TI_KN；
According to TI_PH and TI_KN, according to preset strategy to given coal nozzle amount SI_Coal, given jet for gas amount
SI_Gas, given central cooler speed SI_Cooler, given PH sections of exhausting electric machine frequency SI_PH are adjusted.
Optionally, the preset strategy includes：
When TI_PH is too high or higher, reduce SI_Gas；
When TI_PH is too low or relatively low, increase SI_Gas；
When TI_KN is too high, reduce SI_Cooler；
When TI_PH is too high, or, TI_PH is higher and during TI_KN too high or higher, reduces SI_PH；
When TI_PH is too low or relatively low, increase SI_PH；
When TI_KN is too high or higher, reduce SI_Coal；
When TI_KN is too low or relatively low, increase SI_Coal.
Optionally,
For TI_PH：(720,760] to be too low, (760,800] to be relatively low, (800,860) are zone of reasonableness, [860,
920) to be higher, [920,950) to be too high；
For TI_KN：(820,860] to be too low, (860,890] to be relatively low, (890,910) are zone of reasonableness, [910,
940) to be higher, [940,960) to be too high；
Wherein unit is DEG C.
Optionally, the gap periods of the adjustment are 30 seconds.
There is provided a kind of grate kiln temperature control equipment, described device for second aspect according to embodiments of the present invention
Including：
Temperature acquiring unit, for obtaining PH sections of petticoat pipe temperature TI_PH of drying grate, rotary kiln dump temperature TI_KN；
Control unit, for according to TI_PH and TI_KN, according to preset strategy to giving coal nozzle amount SI_Coal, giving
Determine jet for gas amount SI_Gas, given central cooler speed SI_Cooler, given PH sections of exhausting electric machine frequency SI_PH to be adjusted.
Optionally, the preset strategy includes：
When TI_PH is too high or higher, reduce SI_Gas；
When TI_PH is too low or relatively low, increase SI_Gas；
When TI_KN is too high, reduce SI_Cooler；
When TI_PH is too high, or, TI_PH is higher and during TI_KN too high or higher, reduces SI_PH；
When TI_PH is too low or relatively low, increase SI_PH；
When TI_KN is too high or higher, reduce SI_Coal；
When TI_KN is too low or relatively low, increase SI_Coal.
Optionally,
For TI_PH：(720,760] to be too low, (760,800] to be relatively low, (800,860) are zone of reasonableness, [860,
920) to be higher, [920,950) to be too high；
For TI_KN：(820,860] to be too low, (860,890] to be relatively low, (890,910) are zone of reasonableness, [910,
940) to be higher, [940,960) to be too high；
Wherein unit is DEG C.
Optionally, the gap periods of the adjustment are 30 seconds.
The technical scheme that embodiments of the invention are provided can include the following benefits：
In the present invention, dry, warm no longer using TPH sections of temperature as core, but around PH sections of petticoat pipe temperature
TI_PH deploys, and because PH sections are DDD sections of thermals source, PH sections of high-temperature gas is not expelled directly out, but enter towards DDD sections
Row is recycled, therefore adjusts PH sections of temperature, is conducive to DDD sections of temperature plateau, is also beneficial to the recovery and utilization of energy.
Meanwhile, cooling procedure is deployed, such C1 sections temperature also no longer with C3 sections for core around rotary kiln dump temperature TI_KN
Degree is controlled in advance, is easy to the control of follow-up C2 and C3 temperature, improve C2 section of effectiveness of regenerator, it is to avoid to reduce C3 sections of temperature
And excessive use cold wind or the cooling method of watering, and then saved the energy and resource.
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
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
Fig. 1 is a kind of flow chart of grate kiln temprature control method according to an exemplary embodiment；
Fig. 2 is the equipment schematic diagram of Grate-kiln Oxidized Pellet technique；
Fig. 3 is a kind of schematic diagram of grate kiln temperature control equipment according to an exemplary embodiment.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the present invention.
Fig. 1 is a kind of flow chart of grate kiln temprature control method according to an exemplary embodiment.Ginseng
As shown in Figure 1, this method includes：
S101, obtains PH sections of petticoat pipe temperature TI_PH of drying grate, rotary kiln dump temperature TI_KN.
S102, according to TI_PH and TI_KN, according to preset strategy to given coal nozzle amount SI_Coal, given coal gas spray
Mouth amount SI_Gas, given central cooler speed SI_Cooler, given PH sections of exhausting electric machine frequency SI_PH are adjusted.
As an example, the gap periods (may be simply referred to as the adjustment cycle below) of the adjustment can be 30 seconds every time.
Fig. 2 is that material from left to right successively can be through in the equipment schematic diagram of Grate-kiln Oxidized Pellet technique, Fig. 2
Cross each meaning of parameters in drying grate 201, rotary kiln 202, central cooler 203, figure as follows：
Drying grate 201 is divided into four sections, is respectively：
DDD：Down draft drying, exhausting is dried.Hot blast passes through the mistake that the bed of material makes green-ball remove moisture
Journey.
UDD：Up draft drying, forced air drying.Hot blast makes the mistake of green-ball removing moisture by the bed of material from bottom to top
Journey.
TPH：Tempered preheating, transition preheating.Green-ball continues heating after drying, further removes moisture
With free sulphur, start the process of decomposition and the removing of carbonate and part of sulfuric acid salt.
PH：Preheating, preheating.The bed of material certain preheating temperature gas effect under, carbonate all decompose removing and
Sulphate moiety is decomposed, and green-ball internal grain is oxidized and recrystallizes, and reaches the process consolidated and with some strength.
Central cooler 203 is divided into three sections, is C1, C2, C3 respectively.
Flue gas in C1 sections flows into PH in the presence of C1 sections of air blowers (its blower motor frequency is SI_C1) along rotary kiln
Section.
C2 sections are connected by pipeline with TPH sections, and in C2 sections of air blowers, (its blower motor frequency is the flue gas in C2 sections
SI_C2 TPH sections are flowed into the presence of) along the direction of arrow in the figure.
C3 sections are connected by pipeline with UDD sections, and in C3 sections of air blowers, (its blower motor frequency is the flue gas in C3 sections
SI_C3 UDD sections are flowed into the presence of) along the direction of arrow in the figure.
PH sections are connected by pipeline with DDD sections, and in PH sections of air exhausters, (its blower motor frequency is the flue gas in PH sections
SI_PH DDD sections are flowed into the presence of) along the direction of arrow in the figure.
Flue gas in the DDD sections edge after removing dust in the presence of DDD sections of air exhausters (its exhausting electric machine frequency is SI_DDD)
Direction shown in arrow is discharged in figure.
Flue gas in the TPH sections edge after removing dust in the presence of TPH sections of air exhausters (its exhausting electric machine frequency is SI_TPH)
Direction shown in arrow is discharged in figure.
Flue gas in the UDD sections edge after removing dust in the presence of UDD sections of air exhausters (its exhausting electric machine frequency is SI_UDD)
Direction shown in arrow is discharged in figure.
Given central cooler speed is SI_Cooler.Belt spray control switch is SI_Water.
Rotary kiln dump temperature is TI_KN.Central cooler dump temperature is TI_OUT.
C2, C3 sections of petticoat pipe temperature are respectively TI_C2, TI_C3.
UDD, DDD, TPH, PH sections of petticoat pipe temperature are respectively TI_UDD, TI_DDD, TI_TPH, TI_PH.
The given coal nozzle amount of rotary kiln is that SI_Coal, given jet for gas amount are SI_Gas.
The corresponding unit of each parameter can be found in shown in table 1：
Table 1
| Parameter | Explanation | Unit |
| TI_UDD | UDD sections of petticoat pipe temperature | ℃ |
| TI_DDD | DDD sections of petticoat pipe temperature | ℃ |
| TI_TPH | TPH sections of petticoat pipe temperature | ℃ |
| TI_PH | PH sections of petticoat pipe temperature | ℃ |
| TI_KN | Rotary kiln dump temperature | ℃ |
| TI_C2 | C2 sections of petticoat pipe temperature | ℃ |
| TI_C3 | C3 sections of petticoat pipe temperature | ℃ |
| SI_UDD | Give UDD sections of exhausting electric machine frequencies | Hz |
| SI_DDD | Give DDD sections of exhausting electric machine frequencies | Hz |
| SI_TPH | Give TPH sections of exhausting electric machine frequencies | Hz |
| SI_PH | Give PH sections of exhausting electric machine frequencies | Hz |
| SI_Gas | Given jet for gas amount | t/h |
| SI_Coal | Given coal nozzle amount | m3/h |
| SI_Cooler | Given central cooler speed | m/min |
| SI_C1 | Give C1 sections of blower motor frequencies | Hz |
| SI_C2 | Give C2 sections of blower motor frequencies | Hz |
| SI_C3 | Give C3 sections of blower motor frequencies | Hz |
| TI_OUT | Central cooler dump temperature | ℃ |
Particular content the present embodiment for preset strategy is simultaneously not limited, and those skilled in the art can be according to reality
Situation is designed.As an example, in the present embodiment or some other embodiments of the invention, the preset strategy can be wrapped
Include：
When TI_PH is too high or higher, reduce SI_Gas；
When TI_PH is too low or relatively low, increase SI_Gas；
When TI_KN is too high, reduce SI_Cooler；
When TI_PH is too high, or, TI_PH is higher and during TI_KN too high or higher, reduces SI_PH；
When TI_PH is too low or relatively low, increase SI_PH；
When TI_KN is too high or higher, reduce SI_Coal；
When TI_KN is too low or relatively low, increase SI_Coal.
Wherein, the numerical value that the parameter such as SI_Gas is decreased or increased need to combine concrete scene and determine, to this present embodiment not
Limited.
What is too high, higher, too low, relatively low and zone of reasonableness for, the present embodiment also and is not limited, this area
Technical staff can be designed according to actual conditions.
As an example, in the present embodiment or some other embodiments of the invention：
For TI_PH：(720,760] to be too low, (760,800] to be relatively low, (800,860) are zone of reasonableness, [860,
920) to be higher, [920,950) to be too high；
For TI_KN：(820,860] to be too low, (860,890] to be relatively low, (890,910) are zone of reasonableness, [910,
940) to be higher, [940,960) to be too high；
Wherein unit is DEG C.
As an example, preset strategy can be found in shown in table 2：
Table 2
Wherein LL, L, OK, U, UU implication can be found in shown in table 3：
Table 3
In the present embodiment, dry, warm no longer using TPH sections of temperature as core, but around PH sections of petticoat pipe temperature
Degree TI_PH deploys, and because PH section are DDD sections of thermals source, PH sections of high-temperature gas is not expelled directly out, but leads to DDD sections
Recycled, therefore adjust PH sections of temperature, be conducive to DDD sections of temperature plateau, be also beneficial to recovery and the profit of energy
With.Meanwhile, cooling procedure is deployed also no longer with C3 sections for core around rotary kiln dump temperature TI_KN, such C1 sections
Temperature is controlled in advance, is easy to the control of follow-up C2 and C3 temperature, improve C2 section of effectiveness of regenerator, it is to avoid to drop C3 sections of temperature
Low and excessive use cold wind or the cooling method of watering, and then saved the energy and resource.
Fig. 3 is a kind of schematic diagram of grate kiln temperature control equipment according to an exemplary embodiment.Ginseng
As shown in Figure 3, device 300 includes：
Temperature acquiring unit 301, for obtaining PH sections of petticoat pipe temperature TI_PH of drying grate, rotary kiln dump temperature TI_KN；
Control unit 302, for according to TI_PH and TI_KN, according to preset strategy to given coal nozzle amount SI_Coal,
Given jet for gas amount SI_Gas, given central cooler speed SI_Cooler, given PH sections of exhausting electric machine frequency SI_PH are adjusted
It is whole.
In the present embodiment or some other embodiments of the invention, the preset strategy includes：
When TI_PH is too high or higher, reduce SI_Gas；
When TI_PH is too low or relatively low, increase SI_Gas；
When TI_KN is too high, reduce SI_Cooler；
When TI_PH is too high, or, TI_PH is higher and during TI_KN too high or higher, reduces SI_PH；
When TI_PH is too low or relatively low, increase SI_PH；
When TI_KN is too high or higher, reduce SI_Coal；
When TI_KN is too low or relatively low, increase SI_Coal.
In the present embodiment or some other embodiments of the invention：
For TI_PH：(720,760] to be too low, (760,800] to be relatively low, (800,860) are zone of reasonableness, [860,
920) to be higher, [920,950) to be too high；
For TI_KN：(820,860] to be too low, (860,890] to be relatively low, (890,910) are zone of reasonableness, [910,
940) to be higher, [940,960) to be too high；
Wherein unit is DEG C.
In the present embodiment or some other embodiments of the invention, the gap periods of the adjustment are 30 seconds.
In the present embodiment, dry, warm no longer using TPH sections of temperature as core, but around PH sections of petticoat pipe temperature
Degree TI_PH deploys, and because PH section are DDD sections of thermals source, PH sections of high-temperature gas is not expelled directly out, but leads to DDD sections
Recycled, therefore adjust PH sections of temperature, be conducive to DDD sections of temperature plateau, be also beneficial to recovery and the profit of energy
With.Meanwhile, cooling procedure is deployed also no longer with C3 sections for core around rotary kiln dump temperature TI_KN, such C1 sections
Temperature is controlled in advance, is easy to the control of follow-up C2 and C3 temperature, improve C2 section of effectiveness of regenerator, it is to avoid to drop C3 sections of temperature
Low and excessive use cold wind or the cooling method of watering, and then saved the energy and resource.
On the device in above-described embodiment, wherein unit performs the concrete mode of operation in relevant this method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice invention disclosed herein
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 appended
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (6)
1. a kind of grate kiln temprature control method, it is characterised in that methods described includes：
Obtain PH sections of petticoat pipe temperature TI_PH of drying grate, rotary kiln dump temperature TI_KN；
According to TI_PH and TI_KN, according to preset strategy to given coal nozzle amount SI_Coal, given jet for gas amount SI_
Gas, given central cooler speed SI_Cooler, given PH sections of exhausting electric machine frequency SI_PH are adjusted；
The preset strategy includes：
When TI_PH is too high or higher, reduce SI_Gas；For TI_PH：[920,950) to be too high, [860,920) to be higher；
When TI_PH is too low or relatively low, increase SI_Gas；For TI_PH：(720,760] to be too low, (760,800] to be relatively low；
When TI_KN is too high, reduce SI_Cooler；
When TI_PH is too high, or, TI_PH is higher and during TI_KN too high or higher, reduces SI_PH；
When TI_PH is too low or relatively low, increase SI_PH；When TI_KN is too high or higher, reduce SI_Coal；For TI_KN：
[940,960) to be too high, [910,940) to be higher；
When TI_KN is too low or relatively low, increase SI_Coal；For TI_KN：(820,860] to be too low, (860,890] be compared with
It is low；
Wherein unit is DEG C.
2. according to the method described in claim 1, it is characterised in that
For TI_PH：(800,860) it is zone of reasonableness；
For TI_KN：(890,910) it is zone of reasonableness；
Wherein unit for DEG C.
3. according to the method described in claim 1, it is characterised in that the gap periods of the adjustment are 30 seconds.
4. a kind of grate kiln temperature control equipment, it is characterised in that described device includes：
Temperature acquiring unit, for obtaining PH sections of petticoat pipe temperature TI_PH of drying grate, rotary kiln dump temperature TI_KN；
Control unit, for according to TI_PH and TI_KN, according to preset strategy to given coal nozzle amount SI_Coal, given coal
Gas jets amount SI_Gas, given central cooler speed SI_Cooler, given PH sections of exhausting electric machine frequency SI_PH are adjusted；
The preset strategy includes：
When TI_PH is too high or higher, reduce SI_Gas；For TI_PH：[920,950) to be too high, [860,920) to be higher；
When TI_PH is too low or relatively low, increase SI_Gas；For TI_PH：(720,760] to be too low, (760,800] to be relatively low；
When TI_KN is too high, reduce SI_Cooler；
When TI_PH is too high, or, TI_PH is higher and during TI_KN too high or higher, reduces SI_PH；
When TI_PH is too low or relatively low, increase SI_PH；
When TI_KN is too high or higher, reduce SI_Coal；For TI_KN：[940,960) to be too high, [910,940) be compared with
It is high；
When TI_KN is too low or relatively low, increase SI_Coal；For TI_KN：(820,860] to be too low, (860,890] be compared with
It is low；
Wherein unit is DEG C.
5. device according to claim 4, it is characterised in that
For TI_PH：(800,860) it is zone of reasonableness；
For TI_KN：(890,910) it is zone of reasonableness；
Wherein unit for DEG C.
6. device according to claim 4, it is characterised in that the gap periods of the adjustment are 30 seconds.
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| CN111580576B (en) * | 2020-04-16 | 2022-03-08 | 山东莱钢永锋钢铁有限公司 | System and method for monitoring red ball under ring cooling machine for iron making and automatic water adding machine |
| CN112484025A (en) * | 2020-12-04 | 2021-03-12 | 鞍钢集团矿业有限公司 | Three-channel pulverized coal burner and rotary kiln with same |
| CN115236984B (en) * | 2022-07-25 | 2024-07-23 | 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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| CN101398258B (en) * | 2008-11-04 | 2012-09-05 | 首钢总公司 | Air-coal mixed spraying automatic control system and method thereof |
| CN102866240B (en) * | 2012-09-17 | 2014-11-05 | 中南大学 | Online soft measurement method of magnetite oxygenation efficiency distribution in grate pellet material layer |
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