KR20040100432A - Apparatus for controlling the temperature of sinter machine - Google Patents

Abstract

PURPOSE: To provide an apparatus for controlling temperature of sinter machine to automatically control temperature of sintering furnace by controlling proceeding speed of hearth layer feeding gate and sinter machine according to detection temperature of input side wind box in a process of transferring a blended raw material charged into sintering car to molten sintered ore. CONSTITUTION: In an apparatus for controlling temperature of a sinter machine operated by a motor(45) to manufacture sintered ore by sintering hearth layer fed by a hearth layer feeding damper(22), the apparatus comprises temperature detecting means(111-117) including temperature sensors for detecting temperature at input and output sides of the sinter machine; a deviation operating part(131-135) for calculating a temperature deviation(d) between temperature values at the input side of the sinter machine and temperature values at the output side thereof detected by the temperature detecting means; a temperature control means(140) for providing an error value(f) between the temperature deviation of the deviation operating part and a preset standard deviation(e); first set value operating part(151,152) for converting the error value of the temperature control means into a corresponding damper opening value(g) and adding the damper opening value to a preset damper opening value(h); second set value operating part(161,162) for converting a speed value(j) corresponding to the error value of the temperature control means and adding the speed value to a preset speed value(k); a switching part(170) for a set value(i) of the first set value operating part and a set value of the second set value operating part; a damper track detecting means(241,242) for detecting track of the damper; a damper adjusting means(180) for adjusting an opening ratio of hearth layer feeding gate by comparing a set value of the first set value operating part selected by the switching part with present values detected by the damper track detecting means, thereby adjusting the damper; a speed detecting means(251,252) for detecting speed of the motor of the sinter machine; and a speed control means(190) for controlling speed of the sinter machine motor by comparing the set value of the second set value operating part selected by the switching part with present values detected by the speed detecting means.

Description

Sintering machine temperature control device {APPARATUS FOR CONTROLLING THE TEMPERATURE OF SINTER MACHINE}

The present invention relates to a sintering machine temperature control device, and in particular, in the process of blending raw materials charged into the sintering machine trolley into a molten sintered ore, the upper light extraction gate and the sintering machine according to the detection temperature of the entry-side windbox (lotion box) By controlling the speed of the sintering furnace to automatically adjust the temperature of the sintering furnace, it is possible to keep the temperature of the windbox constant at all times, thereby improving the productivity by preventing environmental pollution, improving the quality of sintered ore and suppressing the amount of semi-light generation. It relates to a sintering machine temperature control device.

1 is a general sintered ore manufacturing process diagram, FIG. 2 is a sintering machine sectional view showing a sintered ore burning and melting process of fixed sintered ore production, and FIG.

1 and 3, in general, the sintering operation performed in the sintering plant of the steel mill, the iron ore raw material stored in the Or Bin (10) is a drum mixer through mixing and assembling process by adding a certain moisture (11) is stored in the surge hopper (12) (Surge Hopper), and then through the split gate (Sub gate) a predetermined amount according to the rotational speed of the drum feeder (Drum Feeder) (13) Particles are segregated and loaded vertically on the sintering machine cart 31 via the deflector plate 14 and the slit bar, and at this time, the compounding material 42 is charged on the upper part of the great bar 32 of the sintering machine. It is then ignited in the sintering furnace ignition furnace (15), is sucked downward from the bottom of the trolley, at this time the sintered ore is a process of firing and manufacturing as the sintering machine proceeds by a motor. The sintered ore produced in the sinterer 40 is stored in the blast furnace sintered ore reservoir 38 after passing through the cooler 37, the primary, secondary and tertiary screens 33, 34 and 35. The sintering machine 40 produces a sintered ore while advancing the effective image distance (usually 100 m).

In other words, three bars of the Great Bars 32 are installed in the body of the pallet 31 through which the intake air passes, and 100 rows of grill bars are installed in each row. In order to prevent the molten light from being fused to the grate bar 32 or the blending material is lost to the gap (5 mm) of the grill-shaped grate bar 32 (FIG. 5), an upper light hopper ( The upper light 41 of the upper light 41 provided through the upper light auxiliary gate 18 connected to the upper light main gate 17 and the upper light manual adjustment roller 19 by the chain 20 is fixed. After laying down to a height (30 to 80 mm), charge the blended raw material (42) after the high-rise of 600 to 700 mm and ignite the surface layer of the charged raw material in the ignition furnace (15) and then down from the main blower (39). As the sintering machine proceeds with suction, the raw material, which is fine powder ore, is melted by the heat generated when the powdered coke particles are burned. Sintered ore which is a semi-melt ore is produced.

Referring to FIGS. 1 to 3, when the coke crushing degree of fuel is large during combustion and melting during the sintering ore manufacturing process, the upper light auxiliary gate 18 is manually operated because excessive light is generated in the large bar 32 due to excessive melting. When the size of the semi-glossy is spread on the trolley, the temperature is lowered. When the particle size is small, the sintering bore's plasticity is poor and the production and quality of the sintered ore are deteriorated. The upper light auxiliary gate 18 is closed to increase the temperature.

However, when the blended raw material 42 is sintered in the process of manufacturing the sintered ore, the temperature of the windbox 26 is changed according to the coke crushing particle size and operating conditions as the sintering furnace is moved. However, according to the conventional method, it is difficult to quickly respond to changes in the temperature of the windbox 26 by different standards based on the driver's experience, and also the light generation and the sintering machine bogie attached to the trolley great bar 32 due to excessive melting. There was a problem such as the production of sintered ore due to poor sintering state, deterioration of quality, and the increase of dust emission of the process dust collector due to the generation of micro-layers, resulting in environmental pollution.

The present invention has been proposed to solve the above-mentioned problems, and its object is to provide a top light extraction gate and a sintering machine in accordance with the detection temperature of the entry and exit windbox in the process of blending raw materials charged in the sintering machine bogie into molten sintered ore. By controlling the speed of the sintering furnace to automatically adjust the temperature of the sintering furnace, it is possible to keep the temperature of the windbox constant at all times, thereby improving the productivity by preventing environmental pollution, improving the quality of sintered ore and suppressing the amount of semi-light generation. It is to provide a sintering machine temperature control device.

1 is a general sintered ore manufacturing process chart.

2 is a sintering machine sectional view showing a sintered ore combustion melting process of sintered ore production fixing.

3 is an explanatory diagram of a method for adjusting a top light extraction gate in a conventional sintered ore manufacturing step.

4 is a block diagram of a sintering machine temperature control apparatus according to the present invention.

FIG. 5 is an installation diagram of each sensor of the windbox temperature detecting unit of FIG. 4.

6 is an operation flowchart of the time delay unit of FIG. 4.

7 is an operating characteristic diagram of the proportioner 1 of FIG. 4.

8 is an operational characteristic diagram of proportioner 2 of FIG. 4.

FIG. 9 is an explanatory view illustrating a cutting gate adjustment process by the damper of FIG. 4.

Explanation of symbols on the main parts of the drawings

117: detection signal selector 121: inlet temperature storage unit

122: outlet temperature storage unit 131: first average calculation unit

132: second average calculation unit 133: time delay unit;

133: switching unit 134: arithmetic unit

135: data storage unit 140: temperature control means

151: proportioner 1 152: adder 1

161: proportioner 2 162: adder 2

180: damper adjusting means 190: speed adjusting means

211: temperature setting unit 221: opening degree setting unit

231: speed setting unit

In order to achieve the above object of the present invention, the sintering machine temperature control apparatus of the present invention

An apparatus for controlling the temperature of a sintering machine which is operated by a motor and sinters the top light cut out by the top light extraction damper to produce a sintered ore,

Temperature detecting means including a temperature sensor detecting a temperature at an inlet and an outlet side of the sintering machine;

A deviation calculator for calculating a temperature deviation between the inlet temperature value and the outlet temperature value by the temperature detecting means;

Temperature adjusting means for providing an error value between a temperature deviation of the deviation calculator and a preset reference deviation;

A first set value calculator for converting an error value of the temperature control means into a corresponding damper opening value, and adding the damper opening value and a preset opening value;

A second set value calculator for converting a speed value corresponding to the error value of the temperature control means and adding the speed value and a preset speed value;

A switching unit for selecting a setting value of the first setting value calculating unit and a setting value of the second setting value calculating unit;

Damper trajectory detecting means for detecting the trajectory of the damper;

Damper adjustment for adjusting the opening ratio of the upper light extraction gate by controlling the damper by comparing the set value of the first set value calculator selected by the switching unit with the present value (PV value) detected by the damper trajectory detecting means. Way;

Speed detecting means for detecting a speed of the sintering machine motor; And

Speed regulating means for controlling the speed of the sintering motor by comparing the set value of the second set value calculating part selected by the switching part with the present value (PV value) detected by the speed detecting means.

Sintering machine temperature control device characterized in that it comprises a.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a configuration diagram of a sintering machine temperature control apparatus according to the present invention. Referring to FIG. 4, the sintering machine temperature control apparatus according to the present invention is operated by a motor 45 and is connected to the upper light extraction damper 22. A device for controlling the temperature of the sintering machine 40 for sintering the top light cut out by the sintered ore to produce a sintered ore, which includes a temperature sensor for detecting the temperature of the inlet and outlet side of the sintering machine (111-117) And a deviation calculation unit (131-135) for calculating a temperature deviation (d) between an inlet temperature value and an outlet temperature value by the temperature detecting means, a temperature deviation (d) of the deviation calculation unit, and a preset reference deviation ( e) a temperature regulating means 140 for providing an error value f with the first step of converting the error value of the temperature regulating means into a corresponding damper opening value and adding the damper opening value and a preset opening value. The set value calculators 151 and 152 and the error value of the temperature control means. Second set value calculators 161 and 162 for converting a speed value to be applied and adding the speed value and a preset speed value, a set value of the first set value calculators 151 and 152, and a second set value calculator 161 and 162 Setting unit 170 for selecting the set value of the control unit, damper trajectory detecting means 241, 242 for detecting the trajectory of the damper 22, and setting of the first set value calculating unit 151, 152 selected by the switching unit. A damper adjusting means 180 for controlling the damper 22 to adjust the degree of opening of the upper light extraction gate by comparing a current value (PV value) detected by the damper track detecting means with the sintering motor 45. Sintering by comparing the speed detection means (251, 252) which detects the speed of the speed difference, and the present value (PV value) detected by the speed detection means with the setting value of the 2nd set value calculation part (161,162) selected by the said switch part. Speed control means 190 for controlling the speed of the existing motor The.

FIG. 5 is a view illustrating installation of each sensor of the windbox temperature detecting means of FIG. 4. Referring to FIG. 5, the temperature detecting means 111-117 may include a plurality of temperature sensors installed at an inlet side of the sintering machine 40. 111 and 112, the temperature sensor 113 provided on the outlet side of the sintering machine 40, and the A / D conversion unit 114 for converting the temperature detection signals from the temperature sensors 111 to 113 into temperature data, respectively. A detection signal selector 117 for selecting one of the plurality of temperature sensors 111 and 112.

The sintering machine temperature control device further includes data storage means (121, 122) for storing the inlet temperature value and the outlet temperature value detected by the temperature detection means, the data storage means (121, 122) is the temperature detection means (111) An inlet temperature storage unit 121 for storing the inlet temperature values inputted from -117) in an input order, and an outlet temperature storage unit for storing the outlet temperature values inputted from the temperature detecting means 111-117 in an input order (-117); 122).

The deviation calculators 131-135 may include first and second average calculators 131 and 132 that calculate respective averages of the inlet and outlet data of the data storage units 121 and 122, and the average calculator 131 and 132. A time delay unit 133 for delaying and outputting the data for a predetermined time, a calculation unit 134 for obtaining a deviation between the inlet temperature signal and the outlet temperature signal through the time delay unit 133, and the deviation calculator 134 It includes a data storage unit 135 for storing the deviation calculated by the ().

6 is an operation flowchart of the time delay unit of FIG. 4. Referring to FIG. 6, the time delay unit 133 counts a time set for inputting a new value to the data storage unit 135, and then sets a value for each time set. The operation of providing the data to the data storage unit 135 is repeated until it stops.

FIG. 7 is an operation characteristic diagram of the proportioner 1 of FIG. 4, wherein the first set value calculators 151 and 152 convert the opening degree value corresponding to the error value of the temperature control means, and the ratio. And an adder 1 152 that adds an opening value from the first 1 151 and a preset opening value. Referring to FIG. 7, the proportioner 1 151 has a set range corresponding to an input error value. Provides an opening value within.

FIG. 8 is an operation characteristic diagram of the proportioner 2 of FIG. 4, wherein the second set value calculators 161 and 162 convert the speed value corresponding to the error value of the temperature control means, and the ratio. And an adder 2 162 that adds a speed value from the key 2 161 and a preset speed value. Referring to FIG. 8, the proportioner 2 161 has a set range corresponding to an input error value. Provides a speed value within.

FIG. 9 is an explanatory view illustrating a cutting gate adjusting process by the damper of FIG. 4. Referring to FIG. 9, the adjusting device of the upper light cutting gate is configured to adjust the cutting of the upper light according to the control of the damper adjusting unit 180. An upper light extraction damper 22, a chain 25 connected to the damper 22, a chain coupling 24 connected to the damper 22 via the chain 25, and the chain coupling 24. And the upper light adjusting shaft 23 rotated by the power from the damper 22 by the chain 25 and the upper light adjusting shaft 23 in accordance with the rotation of the upper light adjusting shaft 23. The upper light manual adjustment roller chain 20 wound around or unwound and the upper light auxiliary gate 18 connected to the lower end of the upper light manual adjustment roller chain 20.

Hereinafter, the operation and effects of the present invention will be described in detail with reference to FIGS. 4 to 9.

Referring to Figure 4, the temperature detecting means (111-117) of the sintering machine temperature control apparatus of the present invention includes a temperature sensor for detecting the inlet and outlet side temperature of the sintering machine, respectively, the inlet side temperature and outlet of the sintering machine The side temperature is detected and provided to the data storage means 121 and 122, respectively. The data storage means 121 and 122 store the inlet temperature value and the outlet temperature value detected by the temperature detection means.

The temperature detecting means will be described in detail with reference to FIG. 5. The plurality of temperature sensors 111 and 112 of the temperature detecting means 111-117 detect the temperature at the inlet side of the sintering machine 40. The temperature sensor 113 of the temperature detection means 111-117 detects the temperature of the outlet side of the sintering machine 40, and the temperature detection signal from each of the temperature sensors 111-113 is an A / D conversion unit. And converted into temperature data by 114-116, respectively, and then provided to the data storage means 121,122. Here, one of the plurality of temperature sensors 111 and 112 may be selected by the detection signal selector 117.

In addition, the data storage means 121 and 122 will be described in detail, and the inlet temperature storage part 121 of the data storage means 121 and 122 receives the inlet temperature values inputted from the temperature detection means 111-117 in the order of input. In addition, the outlet temperature storage unit 122 of the data storage means 121 and 122 stores the outlet temperature values input from the temperature detecting means 111 to 117 in the input order.

Then, the deviation calculation unit (131-135) of the present invention calculates the temperature deviation (d) between the inlet temperature value and the outlet temperature value of the data storage means to provide the temperature control means 140, the temperature control means 140 provides an error value f between the temperature deviation d of the deviation calculator and a preset reference deviation e, which will be described in more detail. The second average calculators 131 and 132 calculate averages of the inlet and outlet data of the data storage units 121 and 122, and the time delay unit 133 of the deviation calculator 131 to 135 is the average. Delay and output the data of the calculation unit (131,132) for a set time, and the calculation unit 134 of the deviation calculation unit (131-135) between the inlet temperature signal and the outlet temperature signal through the time delay unit 133 Find the deviation. Thereafter, the data storage unit 135 of the deviation calculating units 131 to 135 stores the deviation calculated by the deviation calculating unit 134.

In other words, the data values calculated by the first average calculating unit 131 and the second average calculating unit 132 are outputs of the time delay unit 133 set by the driver. The deviation value c is calculated and stored and stored in the data storage unit 135 until the next data input. The time delay unit 133 will be described in detail with reference to FIG. 6, and the time delay unit 133 counts a set time for inputting a new value into the data storage unit 135 to set a value for each set time. The operation provided to the data storage unit 135 is repeatedly performed until it stops.

The first set value calculating unit 151, 152 of the present invention converts the error value of the temperature adjusting means into a corresponding damper opening value, and adds the damper opening value and the preset opening value, which will be described in detail. When the proportioner 1 151 of the first set value calculator 151 or 152 converts the opening value corresponding to the error value of the temperature adjusting means and provides it to the adder 1 152, the adder 1 152 is the ratio. The opening degree value from the first 1151 and the preset opening degree value are added. Referring to FIG. 7, the proportioner 1 151 provides an opening value within a set range corresponding to an input error value.

That is, the data stored in the data storage unit 135 is compared with the data set by the temperature setting unit 221 in the temperature adjusting means 140, and an output value f is output, and the output data f is a ratio 1. 151 calculates the damper ratio value for the input to output the output (g), the output data (g) is added to the opening degree set value 221 and the proportioner output in the adder 1 (152) is the final damper set value (SV value) (i) is output. When the output value i is selected as a damper in the relay switching unit 170, the output value i is input to the damper adjusting unit 180 and compared with the input data subjected to signal processing (A / D) by the damper opening degree detecting unit. Therefore, damper opening and closing is performed. For example, when the input data (detection value) is larger than the set value, the opening ratio of the damper is lowered, and when the input data (detection value) is larger, the damping opening ratio of the damper is increased.

In addition, the second set value calculation unit (161, 162) of the present invention converts the speed value corresponding to the error value of the temperature adjusting means, and adds this speed value and a preset speed value. The proportioner 2 161 of the second set value calculator 161, 162 converts the speed value corresponding to the error value of the temperature control means and provides it to the adder 2 162, and the adder 2 162 is the proportioner. The speed value from 2 (161) and the preset speed value are added. Referring to FIG. 8, the proportioner 2 161 provides a speed value within a set range corresponding to an input error value.

In this case, the switching unit 170 of the present invention selects the set values of the first set value calculators 151 and 152 and the set values of the second set value calculators 161 and 162.

The damper trajectory detecting means 241, 242 of the present invention detects the trajectory of the damper 22, and then the damper adjusting means 180 sets the set value of the first set value calculating unit 151, 152 selected by the switching unit. The damper 22 is controlled by comparing the present value (PV value) detected by the damper track detection means to adjust the opening degree of the upper light extraction gate.

Referring to FIG. 9, a process of adjusting the upper light extracting gate through the damper will be described. Under the control of the damper adjusting means 180, the upper light extracting damper 22 operates to operate the damper 22. The upper light adjusting shaft 23 is rotated by the power from the damper 22 through the chain 25 and the chain coupling 24 connected to the upper portion, and the upper light adjusting shaft 23 rotates according to the rotation of the upper light adjusting shaft 23. The upper light manual adjustment roller chain 20 is wound or unwound on the light adjusting shaft 23, and through this process, the opening degree of the upper light auxiliary gate 18 connected to the lower end of the upper light manual adjustment roller chain 20 is also increased. The rate is adjusted.

The speed detecting means 251, 252 of the present invention detects the speed of the sintering motor 45, and the speed adjusting means 190 sets the second set value calculating part 161, 162 selected by the switching part. The speed of the sintering motor is controlled by comparing the value with the present value (PV value) detected by the speed detecting means.

That is, the output data g calculates the rotation ratio value of the sintering machine motor 45 with respect to the input in the proportioner 2 161 and outputs the output j. The output data j is the adder 2. The final speed set value (SV value) l is output by imagining the output value of the proportioner 2 161 and the speed set value 231 at 162, and this output value l is sintered at the relay switch 190. If the motor is selected as the motor, it is input to the speed regulating means 190 and compared with the input data signal-processed (A / D) by the speed detecting means, and according to the comparison result, the speed of the sintering machine is controlled.

According to the present invention described above, when the temperature of the windbox 26 is higher than the temperature set by the temperature setting unit 211, excessive melting occurs, so that the sintering motor 45 proceeds quickly and the damper 28 is opened to open the windbox. Lower the temperature of (26) and prevent excessive melting and when the temperature of the wind box (26) is lower than the temperature set in the temperature setting section 211, an unsintered layer is generated, so that the sintering machine motor (45) slows down quickly. By closing the upper light auxiliary gate 18 to lower the temperature of the windbox 26 to reduce the dust emission concentration of the process dust collector due to the occurrence of micro-layers, it is always managed by the optimal temperature of the windbox 26 to prevent environmental pollution. It is a control system to prevent pollution and minimize the generation of semi-glow

According to the present invention as described above, the sintering furnace by controlling the traveling speed of the upper light extraction gate and the sintering machine in accordance with the detection temperature of the incoming and outgoing wind box in the process of mixing the raw material charged into the sintering machine bogie By automatically adjusting the temperature of the windbox, the temperature of the windbox can be kept constant at all times, thereby preventing environmental pollution, improving the quality of the sintered ore and suppressing the amount of semi-glow, thereby improving productivity.

In other words, when the blended raw material is fired during the sintering process during the sintering process, when the coke crushing degree of fuel is large due to combustion and melting during the manufacture of the sintered ore, the sintering machine is advanced quickly because the excessive light is generated in the trolley bar. When the light auxiliary gate 18 is opened manually, the semi-light is applied to the trolley to lower the temperature, and when the particle size is small, the sintered trolley is poorly produced and the quality of the sintered ore is deteriorated. As the discharge increases, the environmental defect is increased, so that the sintering machine is slowed to cause the sintering to proceed slowly, increasing the windbox temperature, closing the upper light extraction gate, and spreading the upper light to the bogie so that it can be automatically controlled to fire quickly. Suppresses the generation of adhered light to Grizzlyba and generates semi-glow due to temperature decrease It suppresses the life, prevents the increase of dust emission of the process dust collector due to the improvement of the recovery rate and prevention of microlayers, and it is effective in preventing environmental pollution.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (3)

In the apparatus which is operated by the motor 45 and controls the temperature of the sintering machine 40 which sinters the top light cut out by the top light extraction damper 22, and manufactures a sintered ore, Temperature detecting means (111-117) including a temperature sensor for detecting the inlet and outlet side temperatures of the sintering machine; A deviation calculator (131-135) for calculating a temperature deviation (d) between an inlet temperature value and an outlet temperature value by said temperature detecting means; Temperature adjusting means (140) for providing an error value (f) between the temperature deviation (d) of the deviation calculator and a preset reference deviation (e); First set value calculators 151 and 152 for converting the error value f of the temperature control means into a corresponding damper opening value g and adding the damper opening value g and a preset opening value h; Second set value calculators (161, 162) for converting the speed value (j) corresponding to the error value (f) of the temperature control means and adding the speed value (j) and a preset speed value (k); A switching unit (170) for selecting a set value (i) of the first set value calculator (151, 152) and a set value (l) of the second set value calculator (161, 162); Damper trajectory detecting means (241,242) for detecting the trajectory of the damper (22); The damper 22 is controlled by comparing the set values of the first set value calculating units 151 and 152 selected by the switching unit with the present value (PV value) detected by the damper trajectory detecting means, thereby controlling the opening degree of the upper light extraction gate. Damper adjusting means (180) for adjusting the rate; Speed detecting means (251, 252) for detecting the speed of the sintering motor (45); And Speed adjusting means 190 for controlling the speed of the sintering motor by comparing the set values of the second set value calculating units 161 and 162 selected by the switching unit with the present value (PV value) detected by the speed detecting means. Sintering machine temperature control device characterized in that it comprises a. The apparatus of claim 1, wherein the sinterer temperature control device Further comprising data storage means (121, 122) for storing the inlet temperature value and the outlet temperature value detected by the temperature detection means, The data storage means (121, 122) An inlet temperature storage unit for storing inlet temperature values inputted from the temperature detecting means (111-117) in an input order; And Exit temperature storage unit for storing the exit temperature value input from the temperature detection means (111-117) in the input order Sinterer temperature control device comprising a. The method of claim 1, wherein the deviation calculation unit (131-135) First and second average calculators 131 and 132 which calculate respective averages of inlet and outlet data of the data storage units 121 and 122; A time delay unit 133 for delaying and outputting data of the average calculator 131 and 132 for a set time; A calculation unit 134 for calculating a deviation between the inlet temperature signal and the outlet temperature signal through the time delay unit 133; And Data storage unit 135 for storing the deviation calculated by the deviation calculation unit 134 Sinterer temperature control device comprising a.