CN113295004A - Material layer cooling control system, method and device of circular cooler - Google Patents
Material layer cooling control system, method and device of circular cooler Download PDFInfo
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- CN113295004A CN113295004A CN202011042829.XA CN202011042829A CN113295004A CN 113295004 A CN113295004 A CN 113295004A CN 202011042829 A CN202011042829 A CN 202011042829A CN 113295004 A CN113295004 A CN 113295004A
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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
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The application relates to the technical field of metal sintering and pelletizing, and provides a material layer cooling control system, a material layer cooling control method and a material layer cooling control device of a circular cooler, wherein the control system comprises a rotary table and an infrared thermometer, and the rotary table is arranged on the outer side wall of the circular cooler and is positioned at the process upstream of a fan; the control system further comprises a controller connected with the trolley angular velocity detector and the infrared thermometer, the controller is connected with the fan driver, and the trolley angular velocity detector is used for detecting the running angular velocity of the trolley. The temperature of a plurality of detection points in a section to be detected on the circular cooler trolley is measured in real time through a single infrared thermometer, the average temperature of the charge level is calculated by utilizing the temperatures of the detection points, the air quantity of the circular cooler fan is effectively controlled by utilizing the average temperature, meanwhile, in order to enable the air quantity of the circular cooler fan to achieve the energy-saving effect, a plurality of infrared thermometers can be arranged, the temperature of the surface of the charge level is measured in a grading manner, the fan is reasonably controlled according to the temperature data of the charge level at each grade, and the circular cooler fan can reasonably blow air and efficiently cool.
Description
Technical Field
The application relates to the technical field of metal sintering and pelletizing, in particular to a material layer cooling control system, a material layer cooling control method and a material layer cooling control device of a circular cooler.
Background
Sintering is a basic link of the iron and steel industry and provides high-quality raw materials for iron making. The sintering process is a process of roasting the iron-containing raw material at high temperature on a sintering machine after proportioning and mixing so as to cause the iron-containing raw material to generate a series of physical and chemical changes. The sintered finished product is sinter and is mainly used for blast furnace ironmaking. The sintering production process mainly comprises the steps of raw material receiving, screening and crushing, solvent fuel crushing and screening, material mixing, material distribution, air draft sintering, air draft cooling, crushing and screening, dust removal and the like.
The circular cooler mainly comprises a feeding chute, a trolley, an air box, a discharging chute and the like, and is used for cooling hot ores unloaded from the sintering machine in a blowing or exhausting mode, the cooling effect is related to the thickness of a material layer of the hot ores and the uniformity of paving materials, and the hot ores on the trolley are more thin and easier to cool with the same air quantity. The trolley in the circular cooler usually runs at a constant speed in a linkage manner by multiplying the running speed of the sintering machine by a proportionality coefficient, and in the working process of the circular cooler, air is blown from the bottom of a material layer through a plurality of fans to cool hot ores on the trolley, and the air volume of each fan is the maximum air volume designed for meeting production requirements. Where the cooling of the hot ore is affected by various factors, such as, for example, ambient temperature and how much hot ore is. If the fan blows air according to the maximum air volume, the situation of working redundancy exists, energy waste is caused, and the air volume of the fan needs to be properly controlled according to the temperature of a hot ore material surface, which is contrary to the currently advocated industrial energy conservation and emission reduction.
In the prior art, single-point temperature detection is carried out on the material surface at the discharge chute of the circular cooler by using an infrared thermometer, if the temperature of one section on a trolley needs to be measured, a plurality of infrared thermometers need to be installed, and on one hand, the plurality of infrared thermometers can cause the increase of equipment cost and the difficulty in equipment maintenance; on the other hand, the space at the discharge chute of the circular cooler is limited, and a plurality of infrared thermometers are difficult to install. The temperature of the cross section is estimated by adopting the single-point temperature measured by a single infrared thermometer, the error of the measuring method is large, and the measured data cannot be accurately used for controlling the circular cooler fan.
Disclosure of Invention
The application provides a material layer cooling control system, a material layer cooling control method and a material layer cooling control device of a ring cooling machine, and aims to solve the problems that in the prior art, the single-point temperature measured by a single infrared thermometer is adopted to estimate the temperature of a cross section, the error of the measurement mode is large, and the measurement data cannot be accurately used for controlling a fan of the ring cooling machine.
The first aspect of the application provides a material layer cooling control system of a circular cooler, the control system comprises a rotary table and an infrared thermometer arranged at the rotating tail end of the rotary table, and the rotary table is arranged on the outer side wall of the circular cooler and is positioned at the process upstream of a fan; the control system also comprises a controller connected with the trolley angular velocity detector and the infrared thermometer, the controller is connected with the fan driver, and the trolley angular velocity detector is used for detecting the running angular velocity of the trolley; the controller is configured to perform the steps of:
determining a rotation start position and a rotation end position of the rotating table according to the installation position of the rotating table relative to the trolley;
generating a rotation effective area of the rotation table according to a rotation start position and a rotation end position of the rotation table;
in the rotating effective area, controlling the rotating platform to rotate step by step, and controlling the infrared thermometer to detect the temperature of the primary charge level to obtain a plurality of detection point temperatures when the rotating platform rotates one step;
calculating the coordinates of a plurality of detection points according to the rotation angle of the rotating table and the average thickness of the material layer;
according to the coordinates and the temperatures of the detection points in the same rotating effective area, carrying out temperature interpolation processing on the plurality of detection points, and calculating the average temperature after the interpolation processing;
determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area;
generating a fan control instruction according to the trolley operation angular speed and the fan blowing amount corresponding to each effective rotating area;
and driving the fan to blow air through the fan driver according to the fan control instruction.
Optionally, the step of generating the blowing control instruction according to the operating angular velocity of the trolley and the blower blowing amount corresponding to each effective rotation area specifically includes:
acquiring the running angular speed of the trolley;
calculating the running time of the detection point of each rotary effective area moving to the position of the fan according to the running angular speed of the trolley and the distance between the infrared thermometer and the fan;
and generating a fan control instruction according to the movement time and the fan blowing amount corresponding to each effective rotating area, wherein the fan control instruction comprises the fan blowing amount and blowing time, and the blowing time comprises corresponding fan blowing amount adjustment starting time and adjustment ending time.
Optionally, before the step of determining a rotation start position and a rotation end position of the rotary table according to the mounting position of the rotary table with respect to the cart, the method further includes:
establishing a rotating coordinate system, wherein the rotating coordinate system takes the rotating table as an original point O of coordinates, takes a vertical upward direction as a positive direction of an X axis, and takes a direction pointing to the center of the circular cooler as a positive direction of a Y axis;
then OA is the rotation start boundary and OB is the rotation boundary, where point A is the vertex of the trolley outer fence and point B is the vertex of the trolley inner fence.
Optionally, the number of the rotating table and the infrared thermometers is the same as that of the fans, and a rotating table is arranged at the upstream of each fan in the working procedure; the fan blowing quantity is generated according to the average temperature detected by the infrared thermometer closest to the upstream of the fan.
Optionally, the rotating table includes a rotating motor and a rotating table gear connected to an output shaft of the rotating motor, and the infrared thermometer is mounted at the end of the rotating table gear.
Optionally, the step of determining the blower air volume corresponding to each effective rotation area according to the average temperature of each effective rotation area may further include:
and determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area and the target temperature of the fan cooling.
The second aspect of the present application provides a material layer cooling control method for a circular cooler, where the control method includes:
a material layer cooling control method of a circular cooler comprises the following steps:
determining a rotation start position and a rotation end position of a rotary table according to a mounting position of the rotary table relative to a trolley;
generating a rotation effective area of the rotation table according to a rotation start position and a rotation end position of the rotation table;
in the rotating effective area, controlling the rotating platform to rotate step by step, controlling the infrared thermometer to detect the temperature of the primary charge level to obtain a plurality of detection point temperatures when the rotating platform rotates one step;
carrying out temperature interpolation processing on detection points in the same rotating effective area, and calculating the average temperature after the interpolation processing;
determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area;
generating a fan control instruction according to the trolley operation angular speed and the fan blowing amount corresponding to each effective rotating area;
and driving the fan to blow air through the fan driver according to the fan control instruction.
Optionally, the step of generating the blowing control instruction according to the operating angular velocity of the trolley and the blower blowing amount corresponding to each effective rotation area specifically includes:
acquiring the running angular speed of the trolley;
calculating the running time of the detection point of each rotary effective area moving to the position of the fan according to the running angular speed of the trolley and the distance between the infrared thermometer and the fan;
and generating a fan control instruction according to the movement time and the fan blowing amount corresponding to each effective rotating area, wherein the fan control instruction comprises the fan blowing amount and blowing time, and the blowing time comprises corresponding fan blowing amount adjustment starting time and adjustment ending time.
The third aspect of the application provides a material layer cooling control device of a circular cooler, the control device comprises a rotating table and an infrared thermometer arranged at the rotating tail end of the rotating table, and the rotating table is arranged on the outer side wall of the circular cooler and is positioned at the process upstream of a fan; the control system further comprises a controller connected with the trolley angular velocity detector and the infrared thermometer, the controller is connected with the fan driver, and the trolley angular velocity detector is used for detecting the running angular velocity of the trolley.
Optionally, the rotating table comprises a rotating motor and a rotating table gear connected to an output shaft of the rotating motor, and the infrared thermometer is mounted at the tail end of the rotating table gear;
the number of the rotating platform and the number of the infrared thermometers are the same as that of the fans, and a rotating platform is arranged at the working procedure upstream of each fan; the fan blowing quantity of the fan is generated according to the average temperature detected by the infrared thermometer closest to the upstream.
According to the technical scheme, the material layer cooling control system, the material layer cooling control method and the material layer cooling control device of the circular cooler are characterized in that the material layer cooling control system comprises a rotating table and an infrared thermometer arranged at the rotating tail end of the rotating table, and the rotating table is arranged on the outer side wall of the circular cooler and is positioned at the process upstream of a fan; the control system further comprises a controller connected with the trolley angular velocity detector and the infrared thermometer, the controller is connected with the fan driver, and the trolley angular velocity detector is used for detecting the running angular velocity of the trolley.
In an actual application process, firstly, the controller determines a rotation starting position and a rotation ending position of the rotating table according to the installation position of the rotating table relative to the trolley; then generating a rotating effective area of the rotating platform according to the rotating initial position and the rotating final position of the rotating platform; in the effective rotating area, the rotating platform is controlled to rotate step by step, and the rotating platform rotates by one step, so that the infrared thermometer is controlled to detect the temperature and the distance of the primary charge level, and a plurality of detection point temperatures and distances are obtained; then, calculating the coordinates of a plurality of detection points according to the rotation angle of the rotating platform and the average thickness of the material layer; according to the coordinates and the temperatures of the detection points in the same rotating effective area, carrying out temperature interpolation processing on the plurality of detection points, and calculating the average temperature after the interpolation processing; then, determining the blower blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area; and finally, generating a fan control instruction according to the running angular speed of the trolley and the fan blowing amount corresponding to each rotating effective area, and driving the fan to blow air through the fan driver according to the fan control instruction.
The application provides a control system, through single infrared radiation thermometer, measure the temperature of a plurality of check points in the cross-section that awaits measuring on the cold board car of ring in real time, and utilize the temperature of a plurality of check points to calculate the average temperature of charge level, then utilize the average temperature effective control cold machine fan's of ring amount of wind, and simultaneously, in order to make the cold machine fan's of wind volume reach energy-conserving effect, can set up a plurality of infrared radiation thermometers, the temperature on hierarchical measurement bed of material surface, charge level temperature data according to every level rationally controls the fan, make the cold machine fan of ring amount of wind and high-efficient cooling.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a material layer cooling control system of a circular cooler according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a measurement position of an infrared thermometer provided in an embodiment of the present application;
FIG. 3 is a diagram illustrating steps performed by a controller according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a rotating table according to an embodiment of the present application.
Illustration of the drawings:
the system comprises a rotary table 1, a rotary motor 11, a rotary table gear 12, an infrared thermometer 2, a fan 3, a trolley 4, a trolley 5, a trolley angular speed detector 6, a controller 7 and a fan driver.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
In order to accurately detect the overall temperature of the charge level on a trolley 4 in a ring cooling machine and control a fan 3 according to detected accurate temperature data, a first aspect of the embodiment of the present application provides a charge layer cooling control system of the ring cooling machine, referring to fig. 1, which is a schematic structural diagram of the charge layer cooling control system of the ring cooling machine provided by the embodiment of the present application, the control system includes a rotating table 1 and an infrared thermometer 2 arranged at the rotating end of the rotating table 1, and the rotating table 1 is arranged on the outer side wall of the ring cooling machine and located at the upstream of the fan 3; the control system further comprises a controller 6 connected with the trolley angular velocity detector 5 and the infrared thermometer 2, the controller 6 is connected with the fan driver 7, and the trolley angular velocity detector 5 is used for detecting the running angular velocity of the trolley.
Referring to fig. 3, for the controller provided in the embodiment of the present application to execute the step diagram, the controller 6 is configured to execute the following S301 to S303.
S301, a rotation start position and a rotation end position of the turntable are determined based on a mounting position of the turntable with respect to the carriage.
Fig. 2 is a schematic cross-sectional view of a measurement position of an infrared thermometer according to an embodiment of the present disclosure. The infrared thermometer 2 is used as a circle center O, the infrared thermometer 2 can detect temperature information from the circle center O to a measured object point in a rotation plane, the point A is a measured point on the outer side of the ring cooling machine, and the point B is a measured point on the inner side of the ring cooling machine.
And establishing a rotating coordinate system by taking the rotating table 1 as a coordinate origin O, taking a vertical upward direction as an X-axis positive direction and taking a direction to the center direction of the circular cooler as a Y-axis positive direction, wherein OA is the rotating initial boundary and OB is the rotating boundary, wherein a point A is the vertex of the baffle on the outer side of the trolley, and a point B is the vertex of the baffle on the inner side of the trolley. The calculation methods of the angle θ s at the rotation start position and the angle θ e at the rotation end position of the infrared thermometer 2 are respectively as follows:
with the rotation of the rotary table, starting from the initial position and ending from the ending position, the temperature point position of the material layer section which can be measured by the primary section is n:
because the infrared thermometers 2 measure data at intervals according to angles, detection points close to the infrared thermometers 2 are dense, and the infrared thermometers 2 far away from the infrared thermometers 2 are sparse, so that the collected charge level temperature data are distributed at unequal intervals.
As shown in FIG. 2, an example of a certain type of ring cooler is illustrated as follows: the ring cooler trolley width L2 is 4000mm, the trolley compartment height H2 is 1500mm, and assuming that the installation height H1 of the infrared thermometer 2 is 3000mm and the distance L1 of the infrared thermometer 2 from the outer edge L1 of the trolley 4 is 1000mm, the rotation start position θ s is about 33.6 °, and the rotation end position θ e is about 69.4 °. Assuming that the angle beta of the infrared thermometer 2 is 0.1 degree, the burden surface temperature data of 358 position points can be detected in each section without considering the shielding. The spacing of the measured data points is about 9mm when the infrared thermometer is 25000 mm. Wherein L1 is the distance of the infrared thermometer 2 from the trolley 4 in the horizontal direction, H1 is the height of the infrared thermometer 2 from the bottom of the charge level of the trolley 4, H2 is the height of the ring cooling trolley 4, and L2 is the width of the ring cooling trolley 4.
S302, a rotation effective area of the rotating platform is generated according to the rotation starting position and the rotation ending position of the rotating platform.
Here, the rotation effective region means a time taken for the infrared thermometer 2 to detect the entire cross-sectional temperature on the cross-section of the measurement position of the infrared thermometer 2.
And S303, controlling the rotating platform to rotate step by step in the effective rotating area.
The infrared thermometer 2 determines the temperature of the object by the infrared radiation energy emitted by the object by using the infrared ray with the wavelength between 0.76 and 100 μm, and the higher the temperature of the object is, the stronger the radiation energy of the object is. In nature, when the temperature of an object is higher than absolute zero, the object can continuously radiate electromagnetic waves to the periphery due to the existence of internal thermal motion, wherein the electromagnetic waves comprise infrared rays with the wave band of 0.75-100 μm. At a given temperature and wavelength, the radiation energy emitted by a body has a maximum value, and this material is called a black body, and the reflection coefficient of the black body is set to be 1, and the reflection coefficients of other materials are less than 1, and the black body is called a gray body, because the planckian theorem is satisfied between the spectral radiation power P and the absolute temperature T of the black body. The radiation power of the black body per unit area at the wavelength λ is P at the absolute temperature T. The corresponding relation curve is obtained according to the Planck's theorem, that is, the stronger the radiation energy of the object is with the increase of the temperature.
The method is a starting point of an infrared radiation theory and is also a design basis of a single-band infrared thermometer. The infrared thermometer consists of an optical system, a photoelectric detector, a signal amplifier, a signal processing part, a display output part and the like. The radiation of the measured object and the feedback source is modulated by the modulator and then input to the infrared detector. The difference between the two signals is amplified by the feedback amplifier and controls the temperature of the feedback source.
The infrared thermometer 2 is arranged on the outer side of the trolley 4 of the ring cooling machine, the infrared thermometer is arranged above the trolley 4, the infrared thermometer is arranged on the outer side of the trolley 4, the fact that the influence of the radiant heat of a heated ore is small is mainly considered, the infrared thermometer is convenient to fix, the temperature of the inner side of the ring cooling machine is higher than that of the outer side, and if the infrared thermometer 2 is arranged on the inner side of the ring cooling machine, the equipment protection cost and the equipment maintenance cost can be increased. The infrared thermometer 2 is arranged above the wall of the trolley 4 by a certain distance, and the precision and the shielding problem of the infrared thermometer 2 are mainly considered. As shown in figure 1, the ring cooling machine rotates along the direction shown in figure 1, the infrared thermometer 2 is arranged above the trolley 4 of the ring cooling machine at a height of 0.5-4 m and 0-3 m from the outer edge of a charge level, and the specific height can be adjusted according to process requirements and actual conditions on site.
The infrared thermometer 2 executes steps S304 to S305.
And S304, the rotating platform rotates for one stage, and the infrared thermometer detects the temperature of the primary charge level.
Here, the one-step rotation means rotation by a set rotation angle β.
S305, a plurality of detected point temperatures obtained in one rotation effective region are transmitted.
Fig. 4 is a schematic structural diagram of a turntable according to an embodiment of the present disclosure. The rotating platform 1 comprises a rotating motor 11 and a rotating platform gear 12 connected with an output shaft of the rotating motor 11, and the infrared thermometer 2 is installed at the tail end of the rotating platform gear 12. The infrared thermometer 2 is mounted at the tail end of the turntable gear 12, all detected detection point temperature information in a rotation plane can be rapidly measured through the rotation of the rotating motor 11, the rotation angle of the turntable 1 is adjustable, the angle adjustment is convenient to control, and the rotation angle beta can be set from 0.001 degrees to 10 degrees. Each time the rotary motor 11 is adjusted to rotate by an angle, the rotary encoder returns by an accurate angle beta,
at this time, the infrared thermometer 2 measures the temperature and distance data of a detection point on the charge level, and the infrared thermometer 2 can rapidly measure the temperature of the detection point on the rotation plane by continuously rotating and continuously measuring, and send the temperatures of a plurality of detection points obtained in each rotation effective area to the controller 6.
The controller 6 executes S306 to S308.
S306, a plurality of detection point temperatures obtained in a rotation effective area are received.
And S307, calculating the coordinates of a plurality of detection points according to the rotation angle of the rotating platform and the average thickness of the material layer.
And calculating the coordinates of the plurality of detection points by utilizing the principle of trigonometric function, calculating the distance of the bevel edge according to the rotation angle of the rotating platform and the average thickness of the material layer, and determining the lengths of the two right-angle edges, namely the coordinates of the detection points after knowing the length of the bevel edge (the distance from the infrared thermometer 2 to the detection points) and the angle between the bevel edge and one right-angle edge, wherein the average thickness of the material layer can be obtained from a material distribution system.
S308, performing temperature interpolation processing on the plurality of detection points according to the coordinates and the temperatures of the detection points in the same rotating effective area, and calculating the average temperature after the interpolation processing;
s309, determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area;
the temperature interpolation is carried out between two adjacent detection points, so that the distances between the detection points after interpolation are the same, the average temperature of the temperatures of a plurality of uniform detection points after interpolation is calculated, then the fan blowing amount corresponding to each rotating effective area is determined according to the average temperature of the rotating effective area, it needs to be explained that when the fan blowing amount is determined according to the average temperature, the material layer thickness on the trolley 4 needs to be considered, the material layer thickness is different, the heat of the whole charge level is influenced, in the actual production process, the material layer thickness on the trolley 4 can be controlled through the material distribution, and the material layer thickness is in a stable range, so in the circular cooling process, the material layer thickness can be represented by a fixed value, or the actual material layer thickness is obtained from a material distribution system.
It should be noted that, in the actual use process, the number of the rotating table 1 and the number of the infrared thermometers 2 may be set according to the number of the fans 3, so that the number of the rotating table and the number of the infrared thermometers are the same as that of the fans, and a rotating table is arranged at the upstream of each fan in the process; and ensuring that the blowing quantity of the fan is generated according to the average temperature detected by the infrared thermometer closest to the upstream of the fan.
On the basis, the fan blowing amount of each fan 3 can also be determined according to the target temperature for cooling the fan 3, for example, the fan blowing amount corresponding to each effective rotating area is determined according to the average temperature of each effective rotating area and the target temperature for cooling the fan. The heat formula of the temperature reduction and heat release of the material checking surface is as follows:
wherein Q is heat, c is specific heat capacity, m is mass of the material (obtained according to the thickness of the material layer),
to reduce the temperature difference (obtained from the target temperature of the temperature reduction).
Then, the blower blowing amount f is:
f＝k*Q＝k*c*m*(t-Ts)
wherein t is the average temperature, Ts is the target temperature of the fan cooling, and k is the proportionality coefficient.
The trolley angular velocity detector 5 performs S309 and S310.
And S310, detecting the running angular speed of the trolley.
And S311, transmitting the trolley running angular speed.
The carriage angular velocity detector 5 transmits the detected carriage operation angular velocity to the controller 6.
The controller 6 performs S311 to S313.
And S312, receiving the running angular speed of the trolley.
And S313, generating a fan control instruction according to the trolley running angular speed and the fan blowing amount corresponding to each effective rotating area.
And S314, sending a fan control instruction.
The controller 6 calculates the running time of the movement of the detection point of each rotating effective area to the position of the fan 3 according to the acquired trolley running angular speed and the distance between the infrared thermometer 2 and the fan 3, wherein the distance between the infrared thermometer 2 and the fan 3 is a fixed value, the running time can be obtained according to the installation position of the infrared thermometer 2, then a fan control instruction is generated according to the moving time and the fan blowing amount corresponding to each rotating effective area, the fan control instruction comprises the fan blowing amount and the blowing time, the blowing time comprises the corresponding fan blowing amount adjustment starting time and the adjustment ending time, and the generated fan control instruction is sent to the fan controller 6.
And S315, the fan controller receives a fan control instruction and drives the fan to blow air according to the fan control instruction.
The following are embodiments of the control method of the present application, which are used in embodiments of the control system of the present application. For details not disclosed in the embodiments of the control method of the present application, refer to the embodiments of the control system of the present application.
A second aspect of the embodiments of the present application provides a material layer cooling control method for a circular cooler, where the control method includes: determining a rotation start position and a rotation end position of a rotary table according to a mounting position of the rotary table relative to a trolley;
a rotation effective area of the turntable is generated based on a rotation start position and a rotation end position of the turntable.
And in the rotating effective area, controlling the rotating platform to rotate step by step, controlling the infrared thermometer to detect the temperature of the primary charge level to obtain a plurality of detection point temperatures by rotating the rotating platform by one step.
And performing temperature interpolation processing on the detection points in the same rotation effective area, and calculating the average temperature after the interpolation processing.
And determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area.
And generating a fan control instruction according to the running angular speed of the trolley and the fan blast volume corresponding to each effective rotating area.
And driving the fan to blow air through the fan driver according to the fan control instruction.
Further, the step of generating the blowing control command according to the trolley operation angular velocity and the blower blowing amount corresponding to each effective rotation area specifically includes:
and acquiring the running angular speed of the trolley.
And calculating the running time of the detection point of each rotary effective area moving to the position of the fan according to the running angular speed of the trolley and the distance between the infrared thermometer and the fan.
And generating a fan control instruction according to the movement time and the fan blowing amount corresponding to each effective rotating area, wherein the fan control instruction comprises the fan blowing amount and blowing time, and the blowing time comprises corresponding fan blowing amount adjustment starting time and adjustment ending time.
The following are embodiments of a control apparatus of the present application, which is used for executing embodiments of a control method of the present application. For details that are not disclosed in the embodiments of the control device of the present application, refer to the embodiments of the control method of the present application.
The third aspect of the embodiment of the application provides a material layer cooling control device of a circular cooler, the control device comprises a rotating platform 1 and an infrared thermometer 2 arranged at the rotating tail end of the rotating platform 1, and the rotating platform 1 is arranged on the outer side wall of the circular cooler and is positioned at the upstream of a fan 3; the control system further comprises a controller 6 connected with the trolley angular velocity detector 5 and the infrared thermometer 2, the controller 6 is connected with the fan driver 7, and the trolley angular velocity detector 5 is used for detecting the running angular velocity of the trolley.
The rotating table 1 comprises a rotating motor 11 and a rotating table gear 12 connected with an output shaft of the rotating motor 11, and the infrared thermometer 2 is installed at the tail end of the rotating table gear 12; the number of the rotating platforms 1 and the number of the infrared thermometers 2 are the same as that of the fans 3, and one rotating platform 1 is arranged at the upstream of each fan 3; the fan blowing amount of the fan 3 is generated according to the average temperature detected by the infrared thermometer 2 closest to the upstream.
According to the technical scheme, the material layer cooling control system, the material layer cooling control method and the material layer cooling control device of the circular cooler provided by the embodiment of the application comprise a rotating table 1 and an infrared thermometer 2 arranged at the rotating tail end of the rotating table 1, wherein the rotating table 1 is arranged on the outer side wall of the circular cooler and is positioned at the upstream of a fan 3; the control system further comprises a controller 6 connected with the trolley angular velocity detector 5 and the infrared thermometer 2, the controller 6 is connected with the fan driver 7, and the trolley angular velocity detector 5 is used for detecting the running angular velocity of the trolley.
In practical application, first, the controller 6 determines a rotation start position and a rotation end position of the turntable 1 based on a mounting position of the turntable 1 with respect to the carriage 4; then, a rotation effective area of the rotating table 1 is generated according to the rotation starting position and the rotation ending position of the rotating table 1; in the effective rotating area, the rotating platform 1 is controlled to rotate step by step, the rotating platform 1 rotates by one step, and the infrared thermometer 2 is controlled to detect the temperature of the primary charge level to obtain a plurality of detection point temperatures; then, calculating the coordinates of a plurality of detection points according to the rotation angle of the rotating table 1 and the average thickness of the material layer; according to the coordinates and the temperatures of the detection points in the same rotating effective area, carrying out temperature interpolation processing on the plurality of detection points, and calculating the average temperature after the interpolation processing; then, determining the blower blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area; and finally, generating a fan control instruction according to the running angular speed of the trolley and the fan blowing amount corresponding to each rotating effective area, and driving the fan to blow air through the fan driver according to the fan control instruction.
The control system that this application embodiment provided, through single infrared radiation thermometer 2, measure the temperature of a plurality of check points in the section that awaits measuring on the cold quick-witted platform truck 4 of ring in real time, and utilize the temperature of a plurality of check points to calculate the average temperature of charge level, then utilize the average temperature to effectively control the amount of wind of the cold machine fan of ring, and simultaneously, in order to make the amount of wind of the cold machine fan of ring 3 reach energy-conserving effect, can set up a plurality of infrared radiation thermometers 2, measure the temperature on batch layer surface in grades, according to every grade charge level temperature data reasonable control fan 3, make the cold machine fan of ring 3 blast rationally and high-efficient cooling.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (10)
1. The material bed cooling control system of the circular cooler is characterized by comprising a rotary table and an infrared thermometer arranged at the rotating tail end of the rotary table, wherein the rotary table is arranged on the outer side wall of the circular cooler and is positioned at the process upstream of a fan; the control system also comprises a controller connected with the trolley angular velocity detector and the infrared thermometer, the controller is connected with the fan driver, and the trolley angular velocity detector is used for detecting the running angular velocity of the trolley; the controller is configured to perform the steps of:
determining a rotation start position and a rotation end position of the rotating table according to the installation position of the rotating table relative to the trolley;
generating a rotation effective area of the rotation table according to a rotation start position and a rotation end position of the rotation table;
in the rotating effective area, controlling the rotating platform to rotate step by step, and controlling the infrared thermometer to detect the temperature of the primary charge level to obtain a plurality of detection point temperatures when the rotating platform rotates one step;
calculating the coordinates of a plurality of detection points according to the rotation angle of the rotating table and the average thickness of the material layer;
according to the coordinates and the temperatures of the detection points in the same rotating effective area, carrying out temperature interpolation processing on the plurality of detection points, and calculating the average temperature after the interpolation processing;
determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area;
generating a fan control instruction according to the trolley operation angular speed and the fan blowing amount corresponding to each effective rotating area;
and driving the fan to blow air through the fan driver according to the fan control instruction.
2. The material bed cooling control system according to claim 1, wherein the step of generating the blowing control command according to the trolley operation angular velocity and the blower blowing amount corresponding to each rotation effective area specifically comprises:
acquiring the running angular speed of the trolley;
calculating the running time of the detection point of each rotary effective area moving to the position of the fan according to the running angular speed of the trolley and the distance between the infrared thermometer and the fan;
and generating a fan control instruction according to the movement time and the fan blowing amount corresponding to each effective rotating area, wherein the fan control instruction comprises the fan blowing amount and blowing time, and the blowing time comprises corresponding fan blowing amount adjustment starting time and adjustment ending time.
3. The material layer cooling control system according to claim 1, further comprising, before the step of determining a rotation start position and a rotation end position of the rotary table based on a mounting position of the rotary table with respect to the trolley:
establishing a rotating coordinate system, wherein the rotating coordinate system takes the rotating table as an original point O of coordinates, takes a vertical upward direction as a positive direction of an X axis, and takes a direction pointing to the center of the circular cooler as a positive direction of a Y axis;
then OA is the rotation start boundary and OB is the rotation boundary, where point A is the vertex of the trolley outer fence and point B is the vertex of the trolley inner fence.
4. The material layer cooling control system according to claim 1, wherein the number of the rotating table and the infrared thermometers is the same as that of the fans, and a rotating table is arranged at the upstream of each fan in the process; the fan blowing quantity is generated according to the average temperature detected by the infrared thermometer closest to the upstream of the fan.
5. The material layer cooling control system according to claim 1, wherein the rotary table includes a rotary motor, and a rotary table gear connected to an output shaft of the rotary motor, and the infrared thermometer is mounted at a distal end of the rotary table gear.
6. The material layer cooling control system according to claim 1, wherein the step of determining the blower blast volume corresponding to each effective rotation area according to the average temperature of each effective rotation area further comprises:
and determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area and the target temperature of the fan cooling.
7. A material layer cooling control method of a circular cooler is characterized by comprising the following steps:
determining a rotation start position and a rotation end position of a rotary table according to a mounting position of the rotary table relative to a trolley;
generating a rotation effective area of the rotation table according to a rotation start position and a rotation end position of the rotation table;
in the rotating effective area, controlling the rotating platform to rotate step by step, controlling the infrared thermometer to detect the temperature of the primary charge level to obtain a plurality of detection point temperatures when the rotating platform rotates one step;
carrying out temperature interpolation processing on detection points in the same rotating effective area, and calculating the average temperature after the interpolation processing;
determining the fan blast volume corresponding to each effective rotating area according to the average temperature of each effective rotating area;
generating a fan control instruction according to the trolley operation angular speed and the fan blowing amount corresponding to each effective rotating area;
and driving the fan to blow air through the fan driver according to the fan control instruction.
8. The control method according to claim 7, wherein the step of generating the blowing control command according to the trolley operation angular velocity and the blower blowing amount corresponding to each rotation effective area specifically comprises:
acquiring the running angular speed of the trolley;
calculating the running time of the detection point of each rotary effective area moving to the position of the fan according to the running angular speed of the trolley and the distance between the infrared thermometer and the fan;
and generating a fan control instruction according to the movement time and the fan blowing amount corresponding to each effective rotating area, wherein the fan control instruction comprises the fan blowing amount and blowing time, and the blowing time comprises corresponding fan blowing amount adjustment starting time and adjustment ending time.
9. The material bed cooling control device of the circular cooler is characterized by comprising a rotary table and an infrared thermometer arranged at the rotating tail end of the rotary table, wherein the rotary table is arranged on the outer side wall of the circular cooler and is positioned at the process upstream of a fan; the control system further comprises a controller connected with the trolley angular velocity detector and the infrared thermometer, the controller is connected with the fan driver, and the trolley angular velocity detector is used for detecting the running angular velocity of the trolley.
10. The material layer cooling control device according to claim 9, wherein the rotary table includes a rotary motor, and a rotary table gear connected to an output shaft of the rotary motor, and the infrared thermometer is mounted at a distal end of the rotary table gear;
the number of the rotating platform and the number of the infrared thermometers are the same as that of the fans, and a rotating platform is arranged at the working procedure upstream of each fan; the fan blowing quantity of the fan is generated according to the average temperature detected by the infrared thermometer closest to the upstream.
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| JPH0734143A (en) * | 1993-07-14 | 1995-02-03 | Nippon Steel Corp | Operating method for cooler blower |
| US20180073930A1 (en) * | 2015-03-23 | 2018-03-15 | The Trustees Of Princeton University | Spherical-motion average radiant temperature sensor |
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