CN108411106A - The air quantity controller of cooling equipment - Google Patents
The air quantity controller of cooling equipment Download PDFInfo
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- CN108411106A CN108411106A CN201710239034.XA CN201710239034A CN108411106A CN 108411106 A CN108411106 A CN 108411106A CN 201710239034 A CN201710239034 A CN 201710239034A CN 108411106 A CN108411106 A CN 108411106A
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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
- C22B1/26—Cooling of roasted, sintered, or agglomerated ores
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Abstract
The present invention provides a kind of air quantity controller of cooling equipment.By reducing and setting the best air quantity of temperature condition when meeting ore discharge according to every secondary tracking to predict the temperature of sinter, the consumption electric power of air blower is thus reduced.The air blower and scraper plate that the air quantity controller of cooling equipment has cooling bath, supplies tempering air.The air quantity setting value for predicting ore discharge temperature computation portion (624) Current Temperatures based on the ore positioned at each node and the tempering air supplied to cooling bath calculates separately the prediction ore discharge temperature when ore positioned at each node is moved to gape.Ore discharge temperature comparing section (631) is compared each prediction ore discharge temperature and target temperature range.Air quantity correction portion (632) is corrected air quantity setting value and is controlled the rotating speed of air blower according to the air quantity setting value so that highest prediction ore discharge temperature is contained in target temperature range.
Description
Technical field
The present invention relates to a kind of air quantity controllers of cooling equipment.More particularly to it is suitable for setting to the cooling of cooling ore
The air quantity controller of the Boiler pressure control for the tempering air that available is given.
Background technology
When melting iron ore by blast furnace, the blocking of blast furnace, the reduction of operating rate, need in thin mine in order to prevent
It is mixed into a small amount of pulverized limestone in stone, and fine ore is baked into certain size.Since the sinter after being baked is high temperature, because
This burns out the Transporting equipment in downstream in order to prevent, it is necessary to be cooled to scheduled temperature by cooling equipment.
In the past, existing makes the air quantity of cooling pressure fan be the cooling equipment definitely driven.In addition, Japanese special
It opens and is disclosed in flat 11-236629 bulletins (patent document 1)：The temperature of sinter to being dug out from cooling equipment is surveyed
Calmly, and according to the deviation of sinter temperature the target temperature of the outlet side temperature of cooling equipment is corrected, thus air quantity is carried out
Control.
Patent document 1：Japanese Unexamined Patent Publication 11-236629 bulletins.
Specifically, in patent document 1, by rear class bellows air themperature, sintering level, cooler rotating speed, external gas
Temperature is handled as feedforward control element, and the finished product temperature of cooler outlet side is handled as feedback control element,
Windscreen aperture is adjusted based on mathematic(al) mode.But due to not calculating the temperature reduction of sinter itself and not tracking cooling
The movement of sinter inside device, therefore the best air quantity of cooler entirety is unknown.In addition, in patent document 1, due to passing through
Windscreen aperture generates the power loss of electric fan to adjust air quantity in windscreen portion, and consumption electric power can not be made to minimize.
Invention content
The present invention carries out to solve the problems, such as described above, and its purpose is to provide a kind of wind of cooling equipment
Amount control device predicts the temperature of sinter according to every secondary tracking to the movement of the sinter inside cooler into line trace
It reduces, the best air quantity to meet temperature condition when ore discharge controls the rotating speed of air blower, and thus, it is possible to reduce air blast
The consumption electric power of machine.
To achieve the goals above, the present invention is a kind of air quantity controller of cooling equipment, which has：It is cold
But slot, have be supplied to ore for mine mouth and the gape of ore is discharged, and it is circumferentially rotatable；Air blower, to described cold
But slot supplies tempering air；And scraper plate, ore is dug out from the gape with the rotation of the cooling bath, it is described cold
But the air quantity controller of equipment is characterized in that having：
Tracking portions in slot, for same volume obtained from being divided in the cooling bath each node (each node
Volume be, for example, unit volume corresponding with the defined ore discharge amount of the scraper plate), to from described for mine mouth to the gape
Until ore the movement as unit of node into line trace；
Current Temperatures calculating part calculates separately the Current Temperatures of the ore positioned at each node according to every secondary tracking；
It predicts ore discharge temperature computation portion, Current Temperatures based on the ore positioned at each node and is supplied to the cooling bath
The air quantity setting value of tempering air calculates separately the prediction ore discharge temperature when ore positioned at each node is moved to the gape
Degree；
Ore discharge temperature comparing section is compared each prediction ore discharge temperature and target temperature range；And
Air quantity correction portion, in the case where highest prediction ore discharge temperature is more than the target temperature range, described in raising
Air quantity setting value and make prediction ore discharge temperature computation portion calculate again prediction ore discharge temperature, in the highest prediction ore discharge
In the case that temperature is less than the target temperature range, reduces the air quantity setting value and make prediction ore discharge temperature computation portion
Prediction ore discharge temperature is calculated again, in the case where the highest prediction ore discharge temperature is in the target temperature range,
The rotating speed of the air blower is controlled according to the air quantity setting value.
The effect of invention
According to the present invention, to the movement of the sinter inside cooler into line trace, predict to be sintered according to every secondary tracking
The temperature of mine reduces, and is controlled the rotating speed of air blower with the best air quantity for meeting temperature condition when ore discharge, thus, it is possible to
Enough reduce the consumption electric power of air blower.
Description of the drawings
Fig. 1 is the synoptic diagram that the system for the Iron-smelting for indicating that embodiment is related to is constituted.
Fig. 2 is the synoptic diagram (longitudinal section) of the composition for illustrating cooling equipment 3.
Fig. 3 is the synoptic diagram (plan view) of the composition for illustrating cooling equipment 3.
Fig. 4 is the figure for the example for indicating in the height direction to be divided cooling bath 34.
Fig. 5 is the relevant functional block diagram of control for the cooling equipment 3 being related to embodiment.
Fig. 6 is the figure illustrated for the temperature model to the total losses heat for calculating each node.
Fig. 7 is for the figure to having used the calculating of the node temperature of difierence equation (8) to illustrate.
Fig. 8 is the flow chart for the control routine that air quantity controller 60 executes.
Fig. 9 is the table of an example of the movement for the sinter for indicating to be loaded into node.
Figure 10 is the Current Temperatures for each node for indicating some tracking timing and is moved to positioned at the sinter of each node
The table of an example of the prediction ore discharge temperature (temperature when ore discharge) when gape.
Figure 11 is to indicate the sinter in Object node to by an example of the temperature change until being discharged from gape
Figure.
Figure 12 is to indicate to influence COEFFICIENT KwThe chart of relationship between air quantity W.
Figure 13 A and Figure 13 B are the figures for indicating to be arranged the windscreen near air blower.
Figure 14 is the concept map of the hardware configuration example for the processing circuit for indicating that air quantity controller 60 has.
The explanation of symbol：
1：Store up mine slot；2：Sintering machine；3：Cooling equipment；4：Blast furnace；5：Blender；6：It is packed into hopper；7：Drum feeder；
8：Ignition furnace；9：Pallet；10：Bellows；11：Crusher；12：Mesh screen；13：Conveyer；31：Turntable；32：Outer peripheral sidewall；33：
Inner circumferential side wall；34：Cooling bath；35、35a、35b：Scraper plate, A systems scraper plate, B system scraper plate；36：Ajutage；37：Windscreen；38：
Air blower；39：Water spray nozzle；40、40a、40b：Spirit level, for spirit level before mine, for spirit level after mine；50：It is sintered main control
Device；51：For mine amount information；52：Rotary speed information；53：For mine temperature information；60：Air quantity controller；61：Data collection unit；
62：Temperature reduces calculating part；63：Best Wind Coverage Calculation portion；70：DC-to-AC converter；71：Motor；80、81：Windscreen；91：Place
Manage device；92：Memory；93：Hardware；621：The flat calculating part of trough inner water；622：Tracking portions in slot；623：Current Temperatures calculating part；
624：Predict ore discharge temperature computation portion；631：Ore discharge temperature comparing section；632：Air quantity correction portion；Qair：Based on the convection current to air
Hot-fluid；Qcon：Hot-fluid based on the heat transfer between node；Qrad：Hot-fluid based on radiation；Qwater：Based on pair to cooling water
The hot-fluid of stream；Kw：Influence coefficient；W：Air quantity.
Specific implementation mode
Hereinafter, embodiments of the present invention are described in detail with reference to attached drawing.In addition, for common in the various figures
Element assigns identical symbol and the repetitive description thereof will be omitted.
Embodiment
<The system of Iron-smelting is constituted>
Fig. 1 is the synoptic diagram that the system for the Iron-smelting for indicating that embodiment is related to is constituted.System shown in FIG. 1 has storage
Mine slot 1, sintering machine 2, cooling equipment 3 and blast furnace 4 (blast furnace).
It stores up mine slot 1 and stores the raw materials such as fine ore (iron ore), pulverized limestone, coke blacking.Blender 5 adds in right amount into raw material
Water and mixed, and generate raw materials for sintering.Raw materials for sintering is supplied via loading hopper 6, drum feeder 7 to sintering machine 2.
Sintering machine 2 has ignition furnace 8, multiple pallets 9 and multiple bellows 10 etc..The sintering supplied from drum feeder 7
Raw material is loaded into pallet 9.Ignition furnace 8 lights a fire to the raw materials for sintering on pallet 9.Bellows 10 are disposed in the lower section of pallet 9, lead to
It crosses and attracts air downwards to make the coke in raw materials for sintering burn.Sintering machine 2 is burnt fine ore by the combustion heat of coke
Gu and generating sinter cake.Sinter cake is broken by crusher 11, is set to cooling as ore, i.e. sinter (such as 8~10cm)
Standby 3 supply.
Cooling equipment 3 will be discharged from sintering machine 2 with high temperature according to the reason for preventing the Transporting equipment in downstream from burning out etc.
Sinter be cooled to upper limit ore discharge temperature equipment below.From the sinter that crusher 11 supplies to the top of cooling equipment 3
It is packed into, sinter after cooling takes out from the lower part of cooling equipment 3.The sinter of taking-up is screened by mesh screen 12, and is led to
Conveyer 13 is crossed to supply to blast furnace 4.
<The composition of cooling equipment>
The composition of cooling equipment 3 is illustrated.Fig. 2 is the synoptic diagram (longitudinal section of the composition for illustrating cooling equipment 3
Figure).Fig. 3 is the synoptic diagram (plan view) of the composition for illustrating cooling equipment 3.
Cooling equipment 3 is rotary circular cooling device.Cooling equipment 3 has cricoid cooling bath 34 (cooling hopper).
Cooling bath 34 includes circumferentially rotatable turntable 31, outer peripheral sidewall 32 and inner circumferential side wall 33.The setting of outer peripheral sidewall 32 is being revolved
The outer circumference portion of the upper surface of turntable 31.Inner circumferential side wall 33 configures on the inside of the radial direction of outer peripheral sidewall 32, and and peripheral side
Wall 32, which has, to be positioned apart from.Interval between outer peripheral sidewall 32 and inner circumferential side wall 33 becomes narrow gradually downward.In periphery
Between the lower end and turntable 31 of side wall 32, the circumferential direction of outer peripheral sidewall 32 is provided with the gap for digging out sinter.
In such a configuration, cooling bath 34 is circumferentially rotatable with the rotation of turntable 31.The top of cooling bath 34
Opening, as being supplied to working for mine mouth for sinter.The above-mentioned gap of the lower part of cooling bath 34 is as discharge sinter
Gape works.Inserted with the scraper plate for digging out the sinter in cooling bath 34 to outside cooling bath 34 in above-mentioned gap
35.In the example shown in Fig. 3, there are two scraper plates (A system scraper plates 35a, B system scraper plate 35b) for setting.In the following description
In, scraper plate 35 is only recorded as in the case where not differentiating between two scraper plates.
In addition, cooling equipment 3 has ajutage as carrying out cooling air cooling apparatus to the sinter being packed into
36, windscreen 37 and air blower 38.Air blower 38 supplies tempering air via ajutage 36 into cooling bath 34.Air blower 38
It is connect with the motor 71 (Fig. 5) for making impeller rotate.Motor 71 is connect with DC-to-AC converter 70 (Fig. 5).Air blower 38 is (electronic
Machine 71) rotating speed pass through DC-to-AC converter 70 carry out FREQUENCY CONTROL.
The ajutage 36 in 38 downstream of air blower is from the central portion of cooling bath 34 to radial radial branch.In branch of institute
Be provided in each ajutage 36 makes the windscreen 37 that the aisle spare of ajutage 36 changes according to aperture.The downstream of ajutage 36
It is connect with inner circumferential side wall 33.It is provided on inner circumferential side wall 33 throughout the circumferentially disposed inner circumferential as tempering air introducing port
Side vent window (illustration omitted).It is provided in outer peripheral sidewall 32 throughout circumferentially disposed as the outer of tempering air outlet
Side vent window (illustration omitted).
Thereby, it is possible to will be sprayed to inner circumferential side vent window via ajutage 36 by the tempering air that air blower 38 attracts
It blows, and is supplied into cooling bath 34 and cool down sinter.In addition, the tempering air used in the cooling of sinter, warp
It is discharged to outside cooling bath 34 by the upper opening portion and peripheral side vent window of cooling bath 34.
In addition, cooling equipment 3 has watering spray as carrying out cooling water cooling equipment to the sinter being packed into
Mouth 39.
In addition, the water that the level (height) that cooling equipment 3 has the sinter being packed into opposite cooling bath 34 is measured
Quasi- instrument 40.As an example, as shown in figure 3, in a rotational direction, spirit level 40a before being provided with for mine before for mine point is being supplied
It is provided with for spirit level 40b after mine after mine point.In the following description, in the case where not differentiating between two spirit levels, only remember
It is spirit level 40 to carry.
The elemental motion of cooling equipment 3 is illustrated.Pass through the confession shown in Fig. 3 of 11 breaked sinter of crusher
Mine point is packed into for mine mouth into slot from 34 top of cooling bath.The sinter being packed into circumferentially rotatable cooling bath 34,
It is cooled to upper limit ore discharge temperature or less by above-mentioned air cooling apparatus and water cooling equipment.Sinter after cooling is with cooling bath
34 rotation and dug out from the gape of 34 lower part of cooling bath by scraper plate 35.
<Definition：Node>
By for mine point for mine by the level (height) of sinter rises, pass through horizontal drop by ore discharge based on scraper plate 35
It is low.The ore discharge amount based on scraper plate 35 corresponding with the defined rotation angle of cooling bath 34 is certain, when will be corresponding to the ore discharge amount
Volume when being set as unit volume, cooling bath 34 can be divided according to per unit volume as shown in Figure 3, Figure 4.Fig. 3 tables
Show the example for circumferentially being divided cooling bath 34.Fig. 4 indicates cooling bath 34 having carried out division along short transverse
The figure of example.Cooling bath 34 is circumferentially, equally spaced divided as shown in Figure 3, also, as shown in Figure 4 along height side
To divided (with top divide compared with lower section division thickness bigger).In this way, will be according to per unit volume to cooling
Region obtained from slot 34 is divided is known as " node ".
According to will not due to the rotation of cooling bath 34 and the absolute division of movement determines node.It is divided by short transverse
Position be set as p, the position circumferentially divided be set as j in the case of, the temperature of node is by node temperature TpjIt indicates.In addition, section
The position that the short transverse of point divides only indicates (Fig. 4, Fig. 7, Fig. 9, Figure 10, figure by 1~n of node serial number (n is natural number)
11).The position of node circumferentially divided only indicates (Fig. 3, Fig. 9, Figure 10) by absolute grid numbering A1~A20.In addition, in Fig. 3
In, cooling bath 34 is circumferentially divided into 20 equal portions, but it's not limited to that for division numbers.
<Air quantity controller>
Then, function possessed by the air quantity controller 60 as energy saver with reference to Fig. 5 to cooling equipment 3 carries out
Explanation.Fig. 5 is the relevant functional block diagram of control for the cooling equipment 3 being related to embodiment.
Air quantity controller 60 has data collection unit 61, temperature reduces calculating part 62 and best Wind Coverage Calculation portion 63.
Data collection unit 61 is collected related to cooling equipment 3 from the sintering main control unit 50 controlled firing process
Information (cooling bath 34 for mine amount information 51, cooling bath 34 rotary speed information 52, to cooling bath 34 supply sinter confession
Mine temperature information 53).In addition, sintering main control unit 50 is installed in the programmable logic controller (PLC) set.
Temperature reduces calculating part 62 and is based on information collected by data collection unit 61, such as by the rotation of a node amount
(rotation 1/20 week) is set as periodically tracking timing, according to each tracking timing, calculates working as the sinter positioned at each node
Preceding temperature and prediction ore discharge temperature when being moved to gape positioned at the sinter of each node.Temperature, which reduces calculating part 62, to be had
Tracking portions 622, Current Temperatures calculating part 623 and prediction ore discharge temperature computation portion 624 in the flat calculating part 621 of trough inner water, slot.
The flat calculating part 621 of trough inner water based on the actual value measured by spirit level 40, for mine amount information 51, calculate cooling bath 34
The level (height) of interior sinter.The level of sinter is, for mine point (absolute grid numbering A1) according to for mine amount and on
It rises, a node amount is reduced by the position (absolute grid numbering A6, A16) present in scraper plate 35.
In slot tracking portions 622 for according to each above-mentioned unit volume to each obtained from being divided in cooling bath 34
Node, to from the movement as unit of node for the sinter until mine mouth to gape into line trace.Based on cooling bath 34
The horizontal and above-mentioned rotary speed information of interior sinter comes into line trace.Specifically, cooling bath 34 is had rotated 1/20 week
Timing is considered as the tracking timing for producing the movement as unit of node.Herein, by the way that the rotating speed of motor is multiplied by reducing gear
Ratio is taken turns to calculate the rotating speed of cooling bath 34.Since the rotating speed of cooling bath 34 momently changes, to turning for cooling bath 34
Speed × sampling interval is integrated, and in the case where its integrated value has reached the rotation amount of 1/20 week amount, can be judged as generating
Movement as unit of node (sinter moves absolute division).
Current Temperatures calculating part 623 calculates separately the current temperature of the sinter positioned at each node according to each tracking timing
Degree.Specifically, Current Temperatures calculating part 623 calculates Current Temperatures (the average temperature of each node using aftermentioned temperature model
Degree), the temperature model is in view of the heat loss caused by cross-ventilation, the heat loss caused by sprinkling water, the heat waste caused by radiating
It loses and caused by heat transfer between node heat loss determines.
It predicts Current Temperatures based on the ore positioned at each node of ore discharge temperature computation portion 624 and is supplied to cooling bath 34
Tempering air air quantity setting value, calculate separately the prediction ore discharge temperature when sinter positioned at each node is moved to gape
Degree.Specifically, 624 use of prediction ore discharge temperature computation portion temperature model same as Current Temperatures calculating part 623, calculates position
In each node sinter to by the temperature change until ore discharge.In addition, the initial value of air quantity setting value is based on data collection unit
Information collected by 61 determines.For example, using being previously determined between air quantity setting value and these information (operating condition)
The mapping of relationship, calculating formula determine.The air-cooled heat transfer coefficient h of air quantity setting value and aftermentioned formula (3)aCorrelation is at least wrapped
Wind speed v containing the tempering air supplied to air blower 38.Air quantity setting value can also be various comprising being had an impact to air quantity
Parameter.
Best Wind Coverage Calculation portion 63 calculates the best air quantity for predicting temperature condition when ore discharge temperature disclosure satisfy that ore discharge, and
The rotating speed of air blower 38 is controlled based on the best air quantity.Best Wind Coverage Calculation portion 63 has ore discharge temperature comparing section 631
With air quantity correction portion 632.
Ore discharge temperature comparing section 631 will by 624 calculated each prediction ore discharge temperature of prediction ore discharge temperature computation portion with it is pre-
First target temperature range when determining ore discharge is compared.Target temperature range is set according to the transport in 3 downstream of cooling equipment
Standby heat resisting temperature is come the upper limit ore discharge temperature prescribed limit below that determines.In addition, target temperature range can also be one
Target temperature.
Air quantity correction portion 632 improves air quantity and sets in the case where highest prediction ore discharge temperature is more than target temperature range
Definite value makes prediction ore discharge temperature computation portion 624 calculate prediction ore discharge temperature again.In addition, air quantity correction portion 632 is highest pre-
The case where ore discharge temperature is less than target temperature range is surveyed, air quantity setting value is reduced, prediction ore discharge temperature computation portion 624 is made to count again
Calculate prediction ore discharge temperature.
Also, air quantity correction portion 632 is in the case where highest prediction ore discharge temperature is in target temperature range, according to
Its air quantity setting value controls the rotating speed of air blower 38.Specifically, air quantity correction portion 632 is to as the inverse of converter plant
Become device device 70 and exports speed command corresponding with air quantity setting value.
DC-to-AC converter 70 by the FREQUENCY CONTROL based on speed command come drive motor 71, thus to air blower 38
Rotating speed is controlled.
<Temperature model>
Then, in above-mentioned Current Temperatures calculating part 623 and prediction ore discharge temperature computation portion 624 being single with node
The temperature model used in the temperature computation of position illustrates.Fig. 6 is for the total losses heat for calculating each node
The figure that temperature model illustrates.The summation Σ Q of the hot-fluid of unit-node are indicated by following formula (1).
【Numerical expression 1】
∑ Q=Qair+Qwater+Qrad+Qcon (1)
Herein,
Qair：Hot-fluid based on from the convection current to air
Qwater：Hot-fluid based on from the convection current to cooling water
Qrad：Hot-fluid based on radiation
Qcon：Hot-fluid based on the heat transfer between node
In formula (1), the hot-fluid Q based on the convection current to airairIt is indicated by following formula (2).
【Numerical expression 2】
Qair=ha·Ssinter·(Tnode-Tair) (2)
Herein,
ha：Air-cooled heat transfer coefficient
Ssinter：Agglomerate surface accumulates
Tnode：Node temperature
Tair：Atmospheric temperature
In formula (2), air-cooled heat transfer coefficient haIt is indicated by following formula (3).
【Numerical expression 3】
ha=Nu λ/D (3)
Herein,
Nu=2+0.6Re0.5·Pr0.333
Re=ρ vD/ μ
Pr=Cp μ/λ
λ：Pyroconductivity (air)
D：The diameter of sinter
ρ：Density (air)
μ：Viscosity (air)
Cp：Specific heat (air)
v：Wind speed
In formula (1), the hot-fluid Q based on the convection current to cooling waterwaterIt is indicated by following formula (4).
【Numerical expression 4】
Herein,
Cvw：Heat of evaporation
ρw：The quality of water (per 1mol)
Cpw:The specific heat of water
Tw:The temperature of water
Flw:Watering amount
In formula (1), the hot-fluid Q based on radiationradIt is indicated by following formula (5).
【Numerical expression 5】
Qrad=ε σ Srad·(Tnode 4-Tair 4) (5)
Herein,
ε：Radiance
σ：Stefan Boltzmann coefficient
Srad：Swept area
Tnode：Node temperature
Tair：Atmospheric temperature
In formula (5), swept area SradIt is indicated by following formula (6).
【Numerical expression 6】
Srad=2 π nh·(Lin+Lout) (6)
Herein,
nh：Height of node
Lin：Rotary inside diameter radius
Lout：Rotate outer diameter radius
In formula (1), the hot-fluid Q based on the heat transfer between nodeconIt is indicated by following formula (7).
【Numerical expression 7】
Herein,
k：Pyroconductivity
Si→i-1：Surface area between node
Ti,Ti-1：Sinter temperature
d：Euclidean distance between node pair
To aftermentioned formula (9), the node temperature of each node be substituted by the total losses heat Σ Q for each node that formula (1) indicates
It is such to be represented as difierence equation (8).
【Numerical expression 8】
Tpj=Tpj-1-ΔTpj-1 (8)
Herein,
Tpj：Node temperature
p：Node serial number
j：Absolute grid numbering
ΔTpj：The temperature of reduction during rotating the time Δ t spent for 1/20 week
In formula (8), the temperature Δ T of reduction during rotating the time Δ t spent for 1/20 weekpjIt is indicated by following formula (9).
Herein,
ρ：It is sintered mineral density
C：Specific heat
V：The volume of node
Fig. 7 is for the figure to having used the calculating of the node temperature of difierence equation (8) to illustrate.It is shown in Fig. 7
Example in, absolute grid numbering is incremented (after Δ t seconds) after having rotated 1/20 week, and node temperature is from T31Variation is T32.Section
Point temperature T32According to difierence equation (8) by T32=T31-ΔT31It indicates.According to each tracking timing i.e. whenever rotation 1/20
Zhou Shi, Current Temperatures calculating part 623 just calculate the Current Temperatures (Figure 10) of the sinter positioned at each node.Also, predict ore discharge
Prediction ore discharge temperature (Figure 10) when the calculating of temperature computation portion 624 is moved to gape positioned at the sinter of each node.
<Flow chart>
Fig. 8 is the flow chart of the control routine executed by air quantity controller 60 to realize above-mentioned action.This control
Routine is repeated according to each tracking timing.Assuming that each parameter of temperature model has been preset initial value.
In routine shown in Fig. 8, first, in the step s 100, by being tracked in the flat calculating part 621 of trough inner water and slot
Portion 622 calculates the position for each node for being loaded into sinter.Fig. 9 is an example of the movement for the sinter for indicating to be packed into node
Table.In the example shown in Fig. 9, whenever dividing for mobile 1 (each tracking timing), it is just indicated by absolute grid numbering A1
Circumferential position from adding new sinter for mine mouth.In addition, in the circumferential direction by absolute grid numbering A6 and A16 expressions
Sinter is discharged from gape in position.When the sinter of most lower node is discharged in gape, the level (height) of sinter subtracts
A few node amount.
Then, in step s 110, cooling wind temperature is calculated.Cooling wind temperature is set as to the previous value of sinter temperature
× k (coefficient).
The total losses heat of each node is calculated by the processing of step S120~step S160.Specifically, in step
In S120, is calculated using above-mentioned formula (2) and be based on cross-ventilated heat loss.In step s 130, base is calculated using above-mentioned formula (5)
In the heat loss of radiation.In step S140, the heat loss based on heat transfer between node is calculated using above-mentioned formula (7).In step
In S150, the heat loss based on watering is calculated using above-mentioned formula (4).It, will be in step S120~step also, in step S160
Calculated each heat loss substitutes into above-mentioned formula (1) in S150, and calculates total losses heat.
Then, in step S170, total losses heat is converted into temperature using above-mentioned difierence equation (8) and formula (9)
Degree, and calculate the sinter temperature of each node.
Then, in step S180, the Current Temperatures and prediction ore discharge temperature of each node are calculated.Figure 10 be indicate some with
The Current Temperatures of each node of track timing and prediction ore discharge temperature (row when being moved to gape positioned at the sinter of each node
Temperature when mine) an example table.Current Temperatures and prediction are calculated to whole nodes in cooling bath 34 according to each tracking timing
Ore discharge temperature.In addition, in the calculating of prediction ore discharge temperature, it is assumed that for air quantity until when ore discharge be certain.
Then, in step S190, the highest node of temperature in the prediction ore discharge temperature of each node, when ore discharge is determined.
Then, in step s 200, the prediction ore discharge temperature and target for the Object node that judgement determines in step S190
Whether temperature is consistent.Target temperature is set as the upper limit ore discharge temperature when ore discharge as limitation.As described above, it can also replace
Target temperature and use target temperature range.
In the case where the decision condition of step S200 is invalid, in step S210, pass through above-mentioned air quantity correction portion 632
Air quantity setting value is corrected, and is calculated and the relevant influence coefficient of air quantity setting value.It influences coefficient and is for example used as temperature model
Air-cooled heat transfer coefficient haCorrection factor.
1 and Figure 12 illustrates an example of calculating influence coefficient referring to Fig.1.Figure 11 is to indicate the burning in Object node
Tie the figure of an example of temperature change of the mine until being discharged from gape.Figure 12 is to indicate to influence COEFFICIENT KwBetween air quantity W
The chart of relationship.According to the difference 80 predicted shown in Figure 11 between ore discharge temperature and target temperature, air quantity setting value is corrected.Base
In revised air quantity setting value, relationship calculating influence coefficient K shown in Figure 12 is usedw。
Fig. 8 is returned to continue to explain.In step S220, using reflecting the influence COEFFICIENT K based on revised air quantityw's
Temperature model calculates prediction ore discharge temperature again.
Later, in the case where the decision condition of step S200 is set up, in step S230, become according to air quantity setting value
More air quantity.Specifically, by exporting speed command corresponding with air quantity setting value to DC-to-AC converter 70, thus to air blower
Rotating speed controlled.
<Effect>
As described above, system according to the present embodiment, can be to the sinter in cooling bath 34 to save
Point is the movement of unit into line trace, and calculates separately out the sinter positioned at each node according to every secondary tracking and be moved to gape
When prediction ore discharge temperature.Further, it is possible to which the best of target temperature range can be contained in by setting highest prediction ore discharge temperature
Air quantity, and reduce by the FREQUENCY CONTROL based on inverter the consumption electric power of air blower 38.In this way, due to can be according to section
Point for unit it is each it is mobile predict the ore discharge temperature in future, and set best air quantity at any time, thus can realize it is energy saving with
Product quality improves.In addition, by the aperture of windscreen of the configuration near air blower 38 is set as 100% using inverter come
The rotating speed for reducing air blower 38, it is further energy saving thus, it is possible to realize.
<Variation>
However, in the system of the above embodiment, the temperature model for including the heat loss based on watering is used, still
Without water filling based on Water spray nozzle 39, the temperature mould for eliminating the heat loss based on watering can also be used
Type.
In addition, in the system of the above embodiment, the rotating speed of air blower 38 is controlled, but can also be with air blast
Machine 38 together or instead of air blower 38 controls the aperture for configuring the windscreen near air blower 38.For example, as schemed
Shown in 13A and Figure 13 B, have be arranged the suction side of air blower 38 windscreen 80 or windscreen 81 in discharge side is set.Wind
Amount control device is connect with windscreen 80 or windscreen 81, in the step S230 of Fig. 8, for windscreen output and air quantity setting value phase
The opening degree instruction answered.
In addition, in the system of the above embodiment, cooling equipment 3 has two scraper plates (A system scraper plates 35a, B system
Scraper plate 35b), but it's not limited to that for the quantity of scraper plate.As long as scraper plate is more than one.
In addition, in the system of the above embodiment, it is packed into sinter into cooling equipment 3, but be not limited to sinter,
For other ores, the present invention can also be applied.
It is by tempering air from air blower 38 in addition, the type of cooling of the cooler in the system of the above embodiment
It is blown into formula to what cooling bath 34 was blown into, but not limited to this.The type of cooling of cooler can also be will be used in cooling
The suction-type that air is sucked from cooling bath 34 to air blower 38.
<Hardware configuration example>
Figure 14 is the concept map for the hardware configuration example for indicating processing circuit possessed by air quantity controller 60.Boiler pressure control
Each section in device 60 indicates that a part for function, each function are realized by processing circuit.For example, processing circuit have to
A few processor 91 and at least one processor 92.For example, processing circuit has at least one dedicated hardware 93.
In the case where processing circuit has processor 91 and memory 92, each function passes through software, firmware or hardware
Combination with firmware is realized.At least one party of software and firmware is recited as program.At least one party of software and firmware
It is stored in memory 92.Processor 91 is achieved in each function by reading the program and execution that memory 92 is stored.Place
It manages device 91 and is also referred to as CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, Wei Chu
Manage device, microcomputer, DSP.For example, memory 92 is RAM, ROM, flash memory, EPROM, EEPROM etc. non-volatile or easy
Semiconductor memory, disk, soft board, CD, compact disk, mini-disk, the DVD etc. for the property lost.
In the case where processing circuit has dedicated hardware 93, processing circuit is, for example, single circuit, compound circuit, journey
The processor of sequence, the processor of concurrent program, ASIC, FPGA or the circuit for being composed these.For example, each work(
It can be realized respectively by processing circuit.For example, each function concentration is realized by processing circuit.
In addition, about each function, a part can be made to be realized by dedicated hardware 93, make another part by software or consolidated
Part is realized.
In this way, processing circuit realizes each function by hardware 93, software, firmware or these combination.
Claims (7)
1. a kind of air quantity controller of cooling equipment, the cooling equipment have：Cooling bath, have be supplied to ore for mine mouth
And the gape of discharge ore, and it is circumferentially rotatable；Air blower supplies tempering air to the cooling bath；And scraper plate,
Ore is dug out from the gape with the rotation of the cooling bath, the feature of the air quantity controller of the cooling equipment exists
In having：
Tracking portions in slot, for each node of same volume obtained from being divided in the cooling bath, to from described for mine
The movement as unit of node of ore mouthful until the gape is into line trace；
Current Temperatures calculating part calculates separately the Current Temperatures of the ore positioned at each node according to every secondary tracking；
Predict ore discharge temperature computation portion, the Current Temperatures based on the ore positioned at each node and the cooling to cooling bath supply
With the air quantity setting value of air, the prediction ore discharge temperature when ore positioned at each node is moved to the gape is calculated separately；
Ore discharge temperature comparing section is compared each prediction ore discharge temperature and target temperature range；And air quantity correction portion, most
In the case that high prediction ore discharge temperature is more than the target temperature range, improves the air quantity setting value and the prediction is made to arrange
Mine temperature computation portion calculates prediction ore discharge temperature again, is less than the target temperature range in the highest prediction ore discharge temperature
In the case of, it reduces the air quantity setting value and prediction ore discharge temperature computation portion is made to calculate prediction ore discharge temperature again,
In the case that the highest prediction ore discharge temperature is in the target temperature range, controlled according to the air quantity setting value
The rotating speed of the air blower.
2. the air quantity controller of cooling equipment as described in claim 1, which is characterized in that
The cooling equipment has the converter plant to driving the motor of the air blower to be controlled,
The air quantity correction portion is to converter plant output speed command corresponding with the air quantity setting value and to the drum
The rotating speed of wind turbine is controlled.
3. the air quantity controller of cooling equipment as claimed in claim 1 or 2, which is characterized in that be also equipped with：
Data collection unit, collect the cooling bath for mine amount information, the rotary speed information of the cooling bath and ore for mine
Temperature information；And
The flat calculating part of trough inner water, based on the level for calculating the ore in the cooling bath for mine amount information,
In the slot tracking portions based on the described horizontal and rotary speed information to the movement as unit of node of ore carry out with
Track,
The air quantity setting value information that collection portion is collected based on the data determines.
4. the air quantity controller of cooling equipment as claimed in claim 3, which is characterized in that
The data collection unit is collected described for mine amount information based on the measured value being arranged in the spirit level for mine mouth.
5. the air quantity controller of cooling equipment according to any one of claims 1 to 4, which is characterized in that
The cooling equipment has and makes the windscreen that the air output of the air blower changes according to aperture,
The air quantity correction portion controls the aperture of the windscreen according to the air quantity setting value.
6. the air quantity controller of the cooling equipment as described in any one of claim 1 to 5, which is characterized in that
The ore is sinter.
7. such as the air quantity controller of cooling equipment according to any one of claims 1 to 6, which is characterized in that
The Current Temperatures calculating part and the prediction ore discharge temperature computation portion temperature in use model calculate working as each node
Preceding temperature and prediction ore discharge temperature, the temperature model at least in view of based on cross-ventilated heat loss, based on the heat waste of radiation
It loses, determined based on the heat loss of heat transfer between node.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017022457A JP6638665B2 (en) | 2017-02-09 | 2017-02-09 | Air flow control device for cooler equipment |
| JP2017-022457 | 2017-02-09 |
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| Publication Number | Publication Date |
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| CN108411106A true CN108411106A (en) | 2018-08-17 |
| CN108411106B CN108411106B (en) | 2019-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710239034.XA Active CN108411106B (en) | 2017-02-09 | 2017-04-13 | The air quantity controller of cooling equipment |
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| JP (1) | JP6638665B2 (en) |
| CN (1) | CN108411106B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113748304A (en) * | 2019-04-23 | 2021-12-03 | 普锐特冶金技术日本有限公司 | Granular substance cooling device and scraper |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2018127691A (en) | 2018-08-16 |
| CN108411106B (en) | 2019-11-01 |
| JP6638665B2 (en) | 2020-01-29 |
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