CN109682220B - Air volume control device of sintering cooling equipment - Google Patents
Air volume control device of sintering cooling equipment Download PDFInfo
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- CN109682220B CN109682220B CN201810014653.3A CN201810014653A CN109682220B CN 109682220 B CN109682220 B CN 109682220B CN 201810014653 A CN201810014653 A CN 201810014653A CN 109682220 B CN109682220 B CN 109682220B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0056—Regulation involving cooling
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Abstract
The invention relates to an air volume control device of a sintering cooling device, which improves the homogenization of ore removal temperature and the energy-saving effect of the sintering cooling device. The air volume control device (4) of the sintering cooling equipment has the following structure. A predicted ore removal temperature calculation unit (4c) virtually divides the interior of the storage container into nodes of the same volume, calculates the current temperature of the sintered ore at each node based on the actual data of the input data every time the storage container is rotated by 1 node, and calculates the predicted ore removal temperature in a case where the sintered ore at each node is assumed to move to the ore removal opening based on the predicted future change with time of the input data. An estimated ore removal temperature calculation unit (4d) calculates an estimated ore removal temperature for estimating the air volume of the air blowing device (1b) by averaging the predicted ore removal temperatures of the sintered ores located at the respective nodes. An air volume calculation unit (4e) calculates the air volume of the blower device required for evaluating the matching of the ore removal temperature and the ore removal target temperature.
Description
Technical Field
The invention relates to an air volume control device of sintering cooling equipment. In particular, the present invention relates to an air volume control device suitable for controlling the air volume of cooling air supplied to a cooling facility for cooling sintered ores during control of a sintering process.
Background
A sintering line including a cooling apparatus is explained with reference to fig. 1. FIG. 1 is a diagram showing the equipment configuration of a sintering line. A raw material in which coke and iron ore are mixed is charged into the sintering equipment 2. The sintering equipment 2 ignites the raw material by an ignition device, and feeds air to intensify combustion, thereby producing sintered ore 2a after sintering and solidification. The thermometer 2c measures the air temperature of the rear stage windbox. The cooling apparatus 1 includes: a storage container 1c to which a high-temperature sintered ore 2a sintered and solidified by the sintering equipment 2 is supplied, and an air blowing device 1b for supplying cooling air to the sintered ore 1a supplied into the storage container 1 c. The supplied sintered ore 1a is cooled to a desired temperature by the cooling equipment 1, and then is discharged from a lower tap hole. The ore removal temperature is measured by a thermometer 3 a. The removed sintered ore is conveyed to a downstream facility such as a blast furnace by a conveyor 3.
The temperature of the sintered ore 1a in the cooling equipment 1 is decreased by a retention time in the storage container 1c and an amount of air supplied from the blower 1 b. The retention time in the storage container 1c is determined by the height (level) of the sintered ore deposited in the storage container 1c and the rotation speed of the storage container 1 c. The rotational speed of the storage container 1c is determined by the throughput of the downstream equipment. On the other hand, the blower 1b is often operated at a constant rotational speed, and the amount of air blown into the storage container is adjusted by changing the opening degree of the damper. However, in recent years, in order to reduce the energy consumption of the air blower 1b, an inverter (inverter) is applied to reduce the rotational speed of the air blower 1b without adjusting the air damper, thereby saving energy.
In such air volume control of the cooling equipment in the sintering line, there are also proposals disclosed in the following patent documents. In patent document 1, the rotational speed of the air blower is adjusted by feedback control using the output of a thermometer provided near the mine opening of the cooling equipment. The amount of air supplied into the storage container is adjusted by correcting the damper opening degree based on a mathematical model using the air temperature of the rear stage windbox of the sintering equipment indicating the feeding temperature of the ore to the cooler, the sintered ore height in the storage container indicating the cooling retention time from the feeding to the discharging, the cooler rotation speed, and the like. However, the sintered ore needs to be cooled for approximately two hours from the feeding to the discharging, and the rotation speed of the blower and the air volume change due to the damper opening during this period act on all the sintered ore in the storage container. Therefore, the air volume adjusted based on only the measured value at a specific timing as in the control method of patent document 1 does not necessarily become an effective air volume for all the sintered ores in the storage container.
Prior art documents
Patent document
Patent document 1: japanese laid-open patent publication No. 11-236629
In order to solve such a problem, a method may be considered in which the storage container is virtually divided into nodes having the same volume, predicted ore removal temperatures are calculated for sintered ores located at the respective nodes, and the air volume of the air blower is determined so that the ore removal temperature is lower than the upper limit of the ore removal target temperature for the sintered ore having the highest predicted ore removal temperature. However, in this control method, when only one node in the storage container contains high-temperature sintered ore, the air volume of the blower is adjusted to a large extent during the entire time that the sintered ore is retained in the cooler. Therefore, the other sintered ores are supercooled, and the effect of reducing the energy consumption of the air blower is reduced. Further, the sintered ore is heated and melted again in the blast furnace of the downstream facility, so that the energy consumption of the supercooled sintered ore in the blast furnace is also increased.
In any of the above-described control methods, it is not possible to determine an appropriate air volume, that is, an air volume for controlling the entire sintered ore in the storage container so that the ore removal temperature at the time of ore removal matches the target temperature as much as possible and so that the energy consumption of the blower is minimized.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an air volume control device for a sintering cooling facility, which can achieve an even ore removal temperature and an improved energy saving effect.
The air volume control device of the sintering cooling equipment according to the embodiment of the present invention is configured as follows in order to achieve the above object.
The sintering cooling equipment is provided with: a storage container having a feed port to which sintered ore heated by an upstream sintering apparatus is fed and a discharge port from which the sintered ore is discharged to a downstream device, and rotating in a circumferential direction; a blower device for supplying cooling air to the storage container; and an ore discharging machine for scraping the sintered ore from the ore discharging port with the rotation of the storage container.
The air volume control device of the sintering cooling equipment is provided with an input data collection part, an input data change prediction part, a predicted ore removal temperature calculation part, an estimated ore removal temperature calculation part and an air volume calculation part.
The input data collection unit collects actual data for input data including data relating to sintered ore in the storage container and data relating to the air volume of the air blower. The "data on the sintered ore in the storage container" includes, for example, the height of the sintered ore in the storage container, the rotational speed of the cooler of the storage container, and the feeding temperature-related value of the sintered ore supplied to the storage container. The value related to the feeding temperature may be a value related to the feeding temperature, such as an air temperature of a rear stage wind box of the sintering equipment, in addition to the feeding temperature of the sintered ore supplied to the storage container. The "data relating to the air volume of the blower" may be the motor rotation speed of a driver that drives the blower, in addition to the air volume of the blower.
The input data change prediction unit predicts a future change with time of the input data.
The predicted ore removal temperature calculation unit virtually divides the storage container into nodes having the same volume, and calculates the current temperature of the sintered ore located at each node based on the actual data collected by the input data collection unit every time the storage container is rotated by 1 node. The predicted ore removal temperature calculation unit calculates the predicted ore removal temperature when the sintered ore located at each node is assumed to move to the ore removal port, based on the future temporal change of the input data predicted by the input data change prediction unit.
The evaluation ore removal temperature calculation unit calculates an evaluation ore removal temperature based on an average of predicted ore removal temperatures of sintered ores located at the respective nodes.
The air volume calculation unit calculates the air volume of the air blower necessary for evaluating that the ore removal temperature matches a target ore removal temperature higher than the heat-resistant temperature of a downstream device (for example, the conveyor belt 3 in fig. 1).
In this way, by calculating the average estimated ore removal temperature based on the predicted ore removal temperatures of the respective nodes and controlling the air volume so that the estimated ore removal temperature matches the ore removal target temperature, it is possible to prevent the sintered ore of the high-temperature one node from being supercooled while the sintered ore of the other most nodes are supercooled.
Preferably, the evaluation ore removal temperature calculation unit calculates the evaluation ore removal temperature by weighted averaging of the predicted ore removal temperatures of the sintered ores located at the respective nodes so that the node on the ore removal side is given a larger weight than the node on the ore removal side.
In this way, by reducing the consideration of the air volume calculation for the node on the draw side, which is highly likely to be affected by the future operation change, and performing the calculation of the estimated draw temperature and the air volume calculation for the sintered ore, which give priority to the node on the draw side, it is possible to perform the optimum air volume calculation more suitable for the actual operation.
Effects of the invention
According to the air volume control device of the sintering cooling equipment of the present invention configured as described above, the homogenization of the ore removal temperature and the improvement of the energy saving effect can be achieved.
Drawings
FIG. 1 is a diagram showing the equipment configuration of a sintering line.
Fig. 2 is a conceptual diagram of a cooling apparatus.
Fig. 3 is a diagram for explaining a flow from the supplied sintered ore to the ore removal.
Fig. 4 is a diagram showing an example of node division of the storage container.
Fig. 5 is a diagram for explaining a method of managing temperature information of sintered ore in the cooling facility.
Fig. 6 is a block diagram of the air volume control device.
Fig. 7 is a diagram for explaining a temperature model for calculating the total heat loss of each node.
Fig. 8 is a diagram for explaining the calculation of the node temperature using the difference equation.
Fig. 9 is a flowchart of a routine (routine) executed by the air volume control device.
Fig. 10 is a conceptual diagram showing an example of the hardware configuration of a processing circuit included in the air volume control device.
Fig. 11 is a diagram for explaining an example of weight setting for calculating an evaluation ore removal temperature according to embodiment 2 of the present invention.
Description of reference numerals
1-a cooling device; 1 a-sinter (in storage container); 1 b-an air supply device; 1 c-a storage container; 1 d-ore discharging; 2-sintering equipment; 2 a-sinter (sintering equipment); 2 c-a thermometer; 3-a conveyor belt; 3 a-a thermometer; 4-air volume control device; 4 a-an input data collection unit; 4 b-an input data change prediction unit; 4 c-predicted ore removal temperature calculation section; 4 d-an evaluation ore removal temperature calculation part; 4 e-air volume calculating part; 4 f-output determination section; 91-a processor; 92-a memory; 93-hardware.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals are given to the common elements, and redundant description is omitted.
(constitution of Cooling apparatus)
The basic configuration of the sintering line in the system according to embodiment 1 of the present invention is the same as that shown in fig. 1. The cooling facility 1 (sintering cooling facility) cools the high-temperature sintered ore sintered and solidified by the sintering facility 2, and feeds the cooled sintered ore to a conveyor 3 for conveyance to a downstream facility. The structure of the cooling apparatus 1 shown in fig. 1 will be described with reference to fig. 2. The cooling facility 1 includes a blower 1b, a storage container 1c, and a ore removal machine 1 d.
The blower device 1b supplies cooling air to the storage container 1c through a blower pipe provided inside the cylindrical storage container 1c shown in the vertical sectional view of fig. 2. The blower 1b includes a driving machine and an inverter device, and the motor rotation speed of the driving machine is controlled by the inverter device. The cooling air fed from the air blowing device 1b cools the sintered ore in the storage container 1c to the heat-resistant temperature of the conveyor belt 3 (fig. 1).
The storage container 1c rotates in the circumferential direction as shown in the plan view of fig. 2. The storage container 1c has an upper opening and functions as a feed port to which the sintered ore heated by the upstream sintering equipment 2 is fed. The storage container 1c has a partially open side lower portion and functions as an ore outlet for discharging the sintered ore to a device (such as the conveyor 3) downstream.
The ore discharger 1d is inserted into the ore discharge opening of the storage container 1c, and scrapes the cooled sintered ore from the ore discharge opening with the rotation of the storage container 1 c.
The cooling facility 1 (storage container 1c) can ensure the level in the cooler (the height of the sintered ore in the storage container 1c) by adjusting the rotational speed of the cooler to adjust the amount of ore removed.
Next, the flow from the supplied sintered ore to the ore removal will be described with reference to fig. 3. The sintered ore heated by the sintering equipment 2 is charged from the upper part of the storage container 1c ((a) of fig. 3). The supplied sintered ore 1a moves in the circumferential direction together with the storage container 1 c. Further, according to the rotation of the storage container 1c in the circumferential direction, the previously supplied sintered ore is sequentially scraped by the ore removing machine 1d, and the sintered ore 1a is gradually moved downward of the storage container 1c (fig. 3 (B)). When the sintered ore 1a reaches the lower portion of the storage container 1C, it is scraped by the ore removal machine 1d and removed (fig. 3 (C)).
In operation, as long as there is no lack of material, a stoppage due to maintenance, sintered ore is successively supplied and removed. During this period, the cooling facility 1 changes the cooler rotation speed from the downstream side due to the restriction of the ore discharge amount or the control of the level in the cooler. Therefore, the time from the feeding of the sintered ore to the removal of the sintered ore is not constant.
In the present embodiment, the position, temperature distribution, and temperature history (cooling history) of the sintered ore in the storage container 1c are managed. The position and temperature of the sintered ore are managed in units of nodes of the same volume virtually dividing the inside of the storage container 1c in the circumferential direction and the height direction. The positions and temperatures of the agglomerate groups are managed by using the agglomerates contained in the respective nodes as the agglomerate groups.
Fig. 4 is a diagram showing an example of node division of the storage container 1 c. The storage container 1c is virtually divided into nodes having the same volume. In the example of fig. 4, the storage container 1c is divided into 12 divisions in the circumferential direction and n divisions in the height direction. The storage container 1c is rotated by 1 node amount (1 division) in the circumferential direction and is referred to as being moved by 1 track.
Fig. 5 is a diagram for explaining a method of managing temperature information of sintered ore in the cooling facility 1. In fig. 5, the positions of the nodes are indicated using reference numerals of the rotation direction j and the height direction i. Bit of nodeThe position is a position observed from the outside of the storage container 1c and is located at the node [ i ]][j]Moves to the node [ i ] after 1 trace][j+1]. For each node [ i][j]Recording the calculated current temperature Tp[i][j]And a predicted ore discharge temperature T that is a predicted temperature when the sintered ore (sintered ore cluster) assumed to be the node moves to the ore discharge portO[i][j]。
(air quantity control device)
Fig. 6 is a block diagram of the air volume control device. Each process of the input data collection unit 4a, the input data change prediction unit 4b, the predicted ore removal temperature calculation unit 4c, the estimated ore removal temperature calculation unit 4d, the air volume calculation unit 4e, and the output determination unit 4f in the air volume control device 4 is executed for every 1 trace.
The input data collection unit 4a collects actual data (current value) for input data including data on sintered ore in the storage container 1c and data on the air volume of the blower 1 b. The "data on the sintered ore in the storage container 1 c" includes, for example, the height of the sintered ore in the storage container 1c, the rotational speed of the cooler of the storage container 1c, and the feeding temperature of the sintered ore supplied to the storage container 1 c. The value related to the feeding temperature may be a value related to the feeding temperature, such as the air temperature of a rear stage wind box of the sintering equipment 2, in addition to the feeding temperature of the sintered ore supplied to the storage container 1 c. The "data relating to the air volume of the blower device" may be the motor rotation speed of a driver that drives the blower device 1b, in addition to the air volume of the blower device 1 b. The actual data collected is a value obtained by averaging the values sampled during the period every time the storage container 1c advances by 1 trace.
The input data change prediction unit 4b predicts a future change with time of the input data based on the actual data collected by the input data collection unit 4 a. Specifically, the change of the input data from the time of ore removal to the time of all the sintered ores currently stored in the storage container 1c is predicted. For example, there is a method of making predictions by assuming that the current values of the respective actual data will continue. In addition, by correcting the data using the operation status of the upstream sintering equipment 2 (fig. 1) and the operation status of the downstream equipment (not shown), the prediction accuracy of the change until ore removal can be improved.
The predicted ore removal temperature calculation unit 4c calculates the predicted ore removal temperature of all the sintered ores in the storage container 1c based on the prediction of the change in the process (process) predicted by the input data change prediction unit 4 b.
The predicted ore removal temperature calculation unit 4c virtually divides the storage container 1c into nodes having the same volume, and calculates the current temperature of the sintered ore located at each node based on the actual data collected by the input data collection unit 4a every time the storage container 1c rotates by 1 node. The predicted ore removal temperature calculation unit 4c calculates a predicted ore removal temperature in a case where the sintered ore located at each node is assumed to move to the ore removal port, based on a future temporal change of the input data predicted by the input data change prediction unit 4 b.
Specifically, the predicted ore removal temperature calculation unit 4c calculates the current temperature of each node (average temperature in the node) using a temperature model, which will be described later, determined in consideration of heat loss due to air convection, heat loss due to sprinkling, heat loss due to radiation, and heat loss due to heat conduction between nodes. Further, the temperature change from the sintered ore to the ore removal at each node is calculated using the temperature model.
< temperature model >
Next, a temperature model used for the temperature calculation in the node unit in the predicted ore removal temperature calculation unit 4c will be described. Fig. 7 is a diagram for explaining a temperature model for calculating the total heat loss of each node. The sum Σ Q of the heat flows of the unit nodes is represented by the following equation (1).
[ equation 1 ]
∑Q＝Qair+Qwater+Qrad+Qcon(1)
Wherein the content of the first and second substances,
Qairheat flow due to convection to air
QwaterHeat flow due to convection to cooling water
QradHeat flow due to radiation
QconHeat flow due to heat conduction between nodes
In the formula (1), heat flow Q due to convection to airairRepresented by the following formula (2).
[ equation 2 ]
Qair＝ha·Ssinter·(Tnode-Tair) (2)
Wherein the content of the first and second substances,
haair cooling heat transfer coefficient
SsinterSurface area of sinter
TnodeNode temperature
TairAtmospheric temperature
In the formula (2), the air-cooling heat transfer coefficient haRepresented by the following formula (3).
[ equation 3 ]
ha＝Nu·λ/D (3)
Wherein the content of the first and second substances,
Nu＝2+0.6·Re0.5·Pr0.333
Re＝ρ·v·D/μ
Pr＝Cp·μ/λ
lambda thermal conductivity (air)
D, diameter of sinter
ρ Density (air)
Mu.viscosity coefficient (air)
Cp specific heat (air)
v. wind speed
v＝W/Sd
W is air volume
SdSectional area of the injection port
In the formula (1), heat flow Q due to convection to cooling waterwaterRepresented by the following formula (4).
[ equation 4 ]
Wherein the content of the first and second substances,
Cvwheat of vaporization
ρwQuality of water (1 mol per time)
CpwSpecific heat of water
TwTemperature of water
Flw sprinkling amount
In the formula (1), heat flow Q due to radiationradRepresented by the following formula (5).
[ equation 5 ]
Qrad＝ε·σ·Srad·(Tnode 4-Tair 4) (5)
Wherein the content of the first and second substances,
radiation rate of epsilon
Coefficient of stefan boltzmann
SradRadiation area
TnodeNode temperature
TairAtmospheric temperature
In the formula (5), the radiation area SradRepresented by the following formula (6).
[ equation 6 ]
Srad＝2π·nh·(Lin+Lout) (6)
Wherein the content of the first and second substances,
nhheight of node
LinRadius of inner diameter of rotation
LoutRadius of outer diameter of rotation
In the formula (1), heat flow Q due to heat conduction between nodesconRepresented by the following formula (7).
[ equation 7 ]
Wherein the content of the first and second substances,
k thermal conductivity
Si→i-1Surface area between nodes
Ti,Ti-1Temperature of the sinter
d distance between nodes
The total loss heat Σ Q of each node represented by equation (1) is substituted into equation (9) described later, and the node temperature at each node is represented by the difference equation (8).
[ equation 8 ]
Tpj＝Tpj-1-ΔTpj-1(8)
Wherein the content of the first and second substances,
Tpjnode temperature
p is division number in height direction
j division number of rotation direction
ΔTpjTemperature reduced during the time Δ t taken for 1/12 to rotate
In equation (8), the temperature Δ T that decreases during the time Δ T taken for 1/12 to rotatepjRepresented by the following formula (9).
[ equation 9 ]
Wherein the content of the first and second substances,
rho sintered ore density
C specific heat
Volume of node
Fig. 8 is a diagram for explaining the calculation of the node temperature using the difference equation (8). In the example shown in fig. 8, the division number in the rotational direction after 1/12 rotation (after Δ T seconds) is self-increased by 1, and the node temperature is from T31Change to T32. Node temperature T32From T according to the difference equation (8)32＝T31－ΔT31And (4) showing. The predicted ore removal temperature calculation unit 4c calculates the current temperature of the sintered ore located at each node for every 1/12 revolutions that are the tracking timing. The predicted ore removal temperature calculation unit 4c calculates the predicted ore removal temperature when the sintered ore located at each node moves to the ore removal port.
The explanation is continued with returning to fig. 6. The estimated ore removal temperature calculation unit 4d calculates the estimated ore removal temperature based on the average of the predicted ore removal temperatures of the sintered ores located at the respective nodes (equation (10)). The evaluation ore removal temperature is an index for determining an appropriate air volume of the blower 1 b.
[ equation 10 ]
Wherein the content of the first and second substances,
EvXT-evaluation of ore removal temperature
XT [ j ] [ i ] predicted ore removal temperature of sintered ore located in node of circumferential direction division j and height direction division i
NKNumber of divisions in the height direction
NPThe number of divisions in the circumferential direction
NZNumber of nodes of sintered ore where no calculation object exists
The air volume calculation unit 4e calculates the air volume of the blower 1b necessary for evaluating the matching of the ore removal temperature with the ore removal target temperature higher than the heat-resistant temperature of the downstream device (for example, the conveyor 3 in fig. 1). The air volume calculating unit 4e calculates the air volume required for setting the difference between the evaluation ore removal temperature and the ore removal target temperature to 0. There is also a method of repeatedly calculating the predicted ore removal temperature (and the estimated ore removal temperature) by changing the air volume condition until the air volume is found that the estimated ore removal temperature matches the ore removal target temperature, but by obtaining the influence coefficient of the estimated ore removal temperature with respect to the amount of change in the air volume as described below, it is possible to avoid extensive and repetitive temperature calculation.
Fig. 9 is a flowchart of a routine executed by the air volume control device 4. This routine is executed every 1 trace. In step 5a, the air volume calculation unit 4e sets an air volume condition for calculating the predicted ore removal temperature of each node. Different air volumes are set in the first calculation and the second calculation. The air volume condition in which the current air volume (the air volume of the blower 1b currently being tracked) is slightly reduced is set for the first time, and the current air volume is set for the second calculation.
Next, in step 5b, the predicted ore removal temperature calculation unit 4c calculates the predicted ore removal temperature of each node, and the estimated ore removal temperature calculation unit 4d calculates the estimated ore removal temperature from the predicted ore removal temperatures of all the nodes using equation (10).
If the first and second calculations are finished, the condition of step 5c is satisfied and the process proceeds to step 5 d.
In step 5d, the air volume calculation unit 4e calculates and evaluates the influence coefficient of the ore removal temperature with respect to the amount of change in air volume, using the following expression (11).
[ equation 11 ]
Wherein the content of the first and second substances,
influence coefficient of [ theta ] XY/[ theta ] W
EvXT (1) evaluation of ore removal temperature for first calculation
EvXT (2) second calculated evaluation ore removal temperature
Next, in step 5e, the air volume calculation unit 4e calculates the air volume change amount from the difference between the second-time evaluation ore removal temperature and the target ore removal temperature calculated under the current air volume condition and the influence coefficient, using the following expression (12).
[ equation 12 ]
Wherein the content of the first and second substances,
Δ W amount of change in air volume
The air volume calculating unit 4e calculates the sum of the current air volume and the air volume change amount as the required air volume.
The output determination unit 4f in fig. 6 determines the motor rotation speed of the blower 1b that realizes the air volume (the sum of the current air volume and the air volume change amount) calculated by the air volume calculation unit 4 e. The blower 1b is controlled based on the determination.
(Effect)
As described above, according to the air volume control device 4 of the present embodiment, the ore removal temperature at the time of ore removal can be controlled to match the target ore removal temperature as much as possible with respect to the entire sintered ore in the storage container 1c, and the energy consumption can be minimized.
(modification example)
However, in fig. 4, the storage container 1c is divided into 12 sections in the circumferential direction, but the present invention is not limited thereto, and a plurality of sections may be used. This point is also the same in the following embodiments.
The cooling method of the cooler in the system of the above embodiment is a blowing type in which cooling air is blown from the blower 1b into the storage container 1c, but is not limited to this. The cooling system of the cooler may be an introduction type in which air used for cooling is introduced from the storage container 1c to the air blowing device 1 b. This point is also the same in the following embodiments.
In the system of the above embodiment, a temperature model including heat loss due to sprinkling is used, and in the case where water is not injected through the sprinkling nozzle, a temperature model excluding heat loss due to sprinkling may be used. This point is also the same in the following embodiments.
(hardware configuration example)
Fig. 10 is a conceptual diagram showing an example of the hardware configuration of the processing circuit included in the air volume control device 4. Each part in the air volume control device 4 of fig. 6 represents a part of the function, and each function is realized by a processing circuit. In one embodiment, the processing circuit includes at least one processor 91 and at least one memory 92. In another embodiment, the processing circuit includes at least one dedicated hardware 93.
When the processing circuit includes the processor 91 and the memory 92, each function is realized by software, firmware, or a combination of software and firmware. At least one of the software and the firmware is described as a program. At least one of the software and firmware is stored in the memory 92. The processor 91 reads out and executes a program stored in the memory 92, thereby realizing each function.
When the processing circuit includes the dedicated hardware 93, the processing circuit is, for example, a single circuit, a complex circuit, a programmed processor, or a circuit obtained by combining these circuits. The functions are implemented by processing circuitry.
Next, embodiment 2 of the present invention will be described with reference to fig. 11. In embodiment 1 described above, the estimated ore removal temperatures of the sintered ores located at the respective nodes are simply averaged to calculate an estimated ore removal temperature for estimating the air volume of the air blower. That is, each node is treated equally when calculating the evaluation ore removal temperature. However, if considering the possibility of future operational changes, it is considered that the accuracy of the predicted ore removal temperature of the sintered ore located at the upper node is lower than that of the sintered ore located near the ore removal of the lower node. On the other hand, since the sintered ore located at the lower node is near the ore removal space, the current air volume of the blower 1b is considered to have a large influence on the ore removal temperature.
In view of this, the estimated ore removal temperature calculation unit 4d according to embodiment 2 calculates the estimated ore removal temperature by weighting the nodes on the ore removal side more heavily than the nodes on the ore removal side to average the predicted ore removal temperatures of the sintered ores located at the respective nodes.
The configuration and operation of the cooling facility 1 other than the calculation of the estimated ore removal temperature by the estimated ore removal temperature calculation unit 4d are the same as those of embodiment 1, and therefore, the description thereof is omitted.
Fig. 11 is a diagram for explaining an example of the weight setting for calculating the evaluation ore removal temperature according to embodiment 2 of the present invention. As described above, since it is considered that the influence of the temperature change due to the air volume on the ore drawing temperature is larger as the node closer to the ore drawing port is, the weight setting is also made larger at the lower node.
In the example of fig. 11, the weight setting of the nodes in the height direction is divided into 3 stages, the number of nodes in the lowermost layer is 6 nodes, the number of nodes in the intermediate layer is 6 nodes or more, and other nodes. The weight of the lowest node is set to 0.7, the weight of the middle node is set to 0.3, and the weight of the upper node is set to 0.0. In this way, a weight is set for each node in the storage container 1c, and the evaluation ore removal temperature is calculated using the following formula (13).
[ equation 13 ]
Wherein the content of the first and second substances,
EvXT-evaluation of ore removal temperature
XT [ j ] [ i ] predicted ore removal temperature of sintered ore in node of circumferential direction division j and height direction division i
α1,α2Setting weights for each weight division
NPThe number of divisions in the circumferential direction
The estimated ore removal temperature calculation unit 4d according to embodiment 2 uses formula (13) instead of formula (1) described above when calculating the estimated ore removal temperature. The air volume calculation unit 4e applies the estimated ore removal temperature calculated by equation (13) to equations (11) and (12) to calculate the air volume change amount.
As described above, according to the air volume control device 4 of the present embodiment, the air volume calculation more suitable for the actual operation can be performed by reducing the consideration of the air volume calculation of the upper node having a high possibility of being influenced by the future operation change, and performing the calculation of the estimated ore removal temperature of the sintered ore and the air volume calculation giving priority to the node close to the ore removal port.
While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
Claims (2)
1. An air volume control device for a sinter cooling device, comprising:
a storage container having a feed port to which sintered ore heated by an upstream sintering apparatus is fed and a discharge port from which the sintered ore is discharged to a downstream device, and rotating in a circumferential direction; a blower device for supplying cooling air to the storage container; and an ore discharging machine for scraping the sintered ore from the ore discharging port with the rotation of the storage container,
the air volume control device of the sintering cooling equipment comprises:
an input data collection unit that collects actual data for input data including data relating to sintered ore in the storage container and data relating to the air volume of the air blower;
an input data change prediction unit that predicts a future change with time of the input data;
a predicted ore removal temperature calculation unit that virtually divides the interior of the storage container into nodes having the same volume, calculates the current temperature of the sintered ore at each node based on the actual data collected by the input data collection unit each time the storage container is rotated by 1 node, and calculates a predicted ore removal temperature when the sintered ore at each node is assumed to move to the ore removal port based on future temporal changes of the input data predicted by the input data change prediction unit;
an evaluation ore removal temperature calculation unit that calculates an evaluation ore removal temperature that is a temperature obtained based on an average of predicted ore removal temperatures of sintered ores located at respective nodes;
an air volume calculation unit for calculating an air volume of the air blower required for the evaluation ore removal temperature to coincide with an ore removal target temperature lower than a heat-resistant temperature of the downstream device; and
an output determination unit that determines a motor rotation speed of the blower device that realizes the air volume calculated by the air volume calculation unit,
the air volume control device of the sintering cooling equipment controls the blower based on the motor rotation speed of the blower determined by the output determination unit.
2. The air volume control device of the sintering cooling equipment according to claim 1,
the estimated ore removal temperature calculation unit calculates the estimated ore removal temperature by weighted averaging of the predicted ore removal temperatures of the sintered ores located at the respective nodes so that the node on the ore removal side is given a larger weight than the node on the ore supply side.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11236629A (en) * | 1998-02-23 | 1999-08-31 | Nippon Steel Corp | Method for controlling blasting quantity of cooler for sintered ore |
| CN103014329A (en) * | 2012-12-27 | 2013-04-03 | 中冶长天国际工程有限责任公司 | Control method of annular cooling air blower |
| CN103033055A (en) * | 2012-12-27 | 2013-04-10 | 中冶长天国际工程有限责任公司 | Air volume control method and air volume control system for main exhaust fan of sintering machine |
| CN103234366A (en) * | 2013-04-15 | 2013-08-07 | 中信重工机械股份有限公司 | Automatic control method for cool-constant-temperature ore discharging of sinter ore furnace |
| CN103939924A (en) * | 2014-03-05 | 2014-07-23 | 北京国电富通科技发展有限责任公司 | Intelligent control system for dry slag cooling air amount |
| CN105202918A (en) * | 2014-06-29 | 2015-12-30 | 上海梅山钢铁股份有限公司 | Sintering blowing type annular cooler ore removal temperature control device and method |
-
2017
- 2017-10-18 JP JP2017202009A patent/JP6866822B2/en active Active
-
2018
- 2018-01-08 CN CN201810014653.3A patent/CN109682220B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11236629A (en) * | 1998-02-23 | 1999-08-31 | Nippon Steel Corp | Method for controlling blasting quantity of cooler for sintered ore |
| CN103014329A (en) * | 2012-12-27 | 2013-04-03 | 中冶长天国际工程有限责任公司 | Control method of annular cooling air blower |
| CN103033055A (en) * | 2012-12-27 | 2013-04-10 | 中冶长天国际工程有限责任公司 | Air volume control method and air volume control system for main exhaust fan of sintering machine |
| CN103234366A (en) * | 2013-04-15 | 2013-08-07 | 中信重工机械股份有限公司 | Automatic control method for cool-constant-temperature ore discharging of sinter ore furnace |
| CN103939924A (en) * | 2014-03-05 | 2014-07-23 | 北京国电富通科技发展有限责任公司 | Intelligent control system for dry slag cooling air amount |
| CN105202918A (en) * | 2014-06-29 | 2015-12-30 | 上海梅山钢铁股份有限公司 | Sintering blowing type annular cooler ore removal temperature control device and method |
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| CN109682220A (en) | 2019-04-26 |
| JP2019073781A (en) | 2019-05-16 |
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