JP5511255B2 - Wind speed measuring device and sintering machine - Google Patents

Description

  The present invention relates to a wind speed measuring device, a sintering machine, and a wind speed measuring method for measuring an air volume at a predetermined height on a fuel material layer of a sintering machine.

  In the blast furnace steel industry, the sintering machine includes a pallet group consisting of a plurality of pallets that can be moved by loading the sintering material supplied from the material supply unit, an ignition unit that ignites the sintering material loaded on the pallet, A plurality of window boxes disposed below the pallet group, and an intake pipe connected to the lower end of each window box and sucking gas in the window box are configured. The pallet group has a structure in which the front and rear ends of adjacent pallets are connected to each other and endlessly circulates within the casing of the sintering machine. Each wind box is decompressed by being sucked / exhausted by a blower through an intake pipe.

  During the circulation of the pallet group, first, the sintering raw material is supplied to each pallet from the raw material supply unit, and the conveyance of the sintering raw material is started. Next, the sintered raw material loaded on the pallet is ignited by an ignition furnace which is an ignition part, and is sucked by a blower through a wind box. Thereby, while a pallet group moves, a combustion zone is advanced below from the upper surface of a sintering raw material layer, and a sintered ore is manufactured continuously. The produced sintered ore is discharged from the pallet when the pallet reaches the discharge section. And the pallet from which the sintered ore was discharged | circulates around and conveyed to a raw material supply part.

  By the way, the firing rate of the sintering raw material layer is controlled by the passing air velocity in the layer, which greatly affects the quality and productivity of the sintered ore. For this reason, it is an extremely effective means to measure the passing air speed on the surface of the sintering raw material layer. Therefore, if the in-layer passing air speed can be measured accurately, the firing rate of the sintered ore can be controlled, and the desired sintered ore product quality can be ensured. Therefore, an apparatus and a method for measuring the passing air speed on the surface of the sintering raw material layer have been proposed so far.

  For example, Patent Document 1 discloses an apparatus that proceeds in synchronization with the pallet and continuously measures the passing air speed in the sintering raw material layer. Such an apparatus includes a wind box movably mounted on a sintering raw material layer of a sintering machine, a rectifier provided at the top of the wind box for rectifying suction air, and a flow in the wind box. An anemometer for measuring the flow velocity of the suction air. An upper funnel-shaped body is provided at the top of the wind box, and further, a hood having upper and lower ends opened on the upper outer side of the funnel-shaped body, a baffle plate provided in the upper center of the hood, and a lower part of the baffle plate A partition plate for partitioning the attached hood in the vertical direction is provided. With this configuration, it is possible to prevent the air volume distribution in the wind box body from becoming unstable due to the influence of the cross wind entering from the top of the wind box.

  For example, Patent Document 2 discloses a method of operating a sintering machine that adjusts and controls the wind speed distribution in the width direction of the sintered layer in order to secure a sintered ore with stable quality. In such an operation method, the wind speed is measured using an anemometer at a plurality of positions in the width direction of the sintered layer on the surface of the sintered layer, continuously in the machine length direction, or at several points in the machine length direction. An anemometer consists of an upper cylindrical part and a lower flare part. The cylindrical part is provided with an anemometer such as a turbine meter and a rectifying plate. A seal member for preventing air from entering is provided.

JP 59-35774 A JP 61-250120 A

  However, since the apparatus for measuring the passing wind speed of the fuel raw material layer described in Patent Documents 1 and 2 includes a mechanism for preventing the influence of the cross wind and a mechanism for rectifying the wind, both are extremely large-scale configurations. It was. In addition, as described in Patent Documents 1 and 2, if a mechanism for causing the apparatus to proceed in synchronization with the pallet, a pedestal for supporting the apparatus on the sintering raw material layer, and the like are provided, the installation cost is reduced. A problem arises in terms of installation space around a narrow sintering machine. Furthermore, since pressure loss is caused by the wind box or the rectifying mechanism, a seal member for preventing air leakage from the lower part of the wind box is required. However, at present, many problems remain in the durability of the seal member.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved wind speed measuring apparatus, a firing system capable of measuring with high accuracy stably over a long period of time. It is to provide a kneading machine and a wind speed measuring method.

In order to solve the above problems, according to an aspect of the present invention, there is provided a wind speed measuring device for measuring a wind speed of a sintering material layer of a sintering machine. The wind speed measuring device of the present invention is supported by a support mechanism including a support provided around the sintering machine and a horizontal support part supported by the support, and is mounted on the bottom surface of the pallet of the sintering machine. A moving part that is in contact with the surface of the sintered raw material layer and is movable relative to the sintered raw material layer that moves with the pallet, and a wind speed measuring unit that measures the wind speed in the vertical direction above the sintered raw material layer, is supported by the moving part, a support for supporting a wind velocity measuring section, and a second height adjusting unit that holds the distance between the wind velocity measuring section and the sintering material layer surface in the vertical direction to the second height, the And the second height adjusting unit is inserted into a through hole formed in the horizontal support unit and penetrating in the vertical direction. Variation of the surface height of the sintering material layer Magnitude between the threshold below height value measured by the wind velocity measuring unit begins to receive the effect of disturbance, the stopper of the vertical support portion is in contact with the through hole of the horizontal support, sintering material layer surface height When the magnitude of the fluctuation exceeds the threshold height at which the value measured by the wind speed measurement unit is affected by the disturbance , the stopper rises with respect to the horizontal support unit, and the vertical position of the wind speed measurement unit is burned. The second material is held at the second height by following the surface height of the binder layer.

According to the present invention, when the height of the sintering material layer surface varies greatly, so that the height from the sintering material layer surface of the wind velocity measuring section becomes possible second height, wind speed by the height adjusting portion Adjust the vertical position of the measurement unit. As a result, the wind speed measuring unit can measure the wind speed without being substantially affected by the cross wind or the like, and can stably monitor the progress of the sintering process from the measured wind speed. Further, the conventional mechanism for preventing the cross wind and the like is not required, and the wind speed measuring device can be simply configured.

Further, when the magnitude of the fluctuation of the sintering raw material layer surface height is less than the threshold height , the second height adjusting unit sets the position of the wind speed measuring unit in the vertical direction to the sintering raw material layer surface height. Do not follow. Thereby, when the fluctuation | variation of the distance of a wind speed measurement part and the sintering raw material layer surface is small, an anemometer is not vibrated to a perpendicular direction and a wind speed can be measured stably.

The wind speed measuring device can also include a first height adjusting unit that holds the position of the wind speed measuring unit in the vertical direction with respect to the bottom surface of the pallet of the sintering machine on which the sintering raw material is loaded at a first height. . The first height adjusting unit includes a first base unit that supports the moving unit, and a second base unit that is connected to the support unit and supports the first base unit so as to be rotatable. When the magnitude of the fluctuation of the sintering raw material layer surface height is less than the threshold height , the first base part of the first height adjustment part rotates with respect to the second base part, Absorbs fluctuations in the vertical position of the wind speed measuring section with respect to the bottom surface of the pallet of the sintering machine. Thereby, when the fluctuation | variation of the distance of a wind speed measurement part and the sintering raw material layer surface is small, an anemometer is not vibrated to a perpendicular direction and a wind speed can be measured stably.

The wind speed measuring device may further include a moving speed detecting unit that detects a moving speed in the vertical direction of the wind speed measuring unit, and a correction processing unit that corrects the wind speed measured by the wind speed measuring unit. At this time, the correction processing unit corrects the wind speed measured by the wind speed measuring unit based on the moving speed detected by the moving speed detecting unit. Thereby, the wind speed can be measured with higher accuracy.

Further, according to another aspect of the present invention, the bottom of the pallet of the sintering machine is supported by a support mechanism including a support provided around the sintering machine and a horizontal support part supported by the support. A moving part that is in contact with the surface of the sintering material layer loaded thereon and is movable relative to the sintering material layer that moves with the pallet, and a wind speed that measures the wind speed in the vertical direction above the sintering material layer A second height adjustment that maintains the distance between the measurement unit, the support unit supported by the moving unit and supporting the wind speed measurement unit, and the distance between the wind speed measurement unit and the surface of the sintering raw material layer in the vertical direction at the second height. And a wind speed measuring device including the unit. The second height adjustment unit includes a distance detection unit that detects a distance between the wind speed measurement unit and the surface of the sintering raw material layer in the vertical direction, and a control unit that determines whether or not to adjust the height of the wind speed measurement unit. , and a drive unit for varying the height of the wind velocity measuring unit when determining to adjust the height of the wind velocity measuring section by the control section, the second height adjusting unit, the detection detected by the distance detecting unit When the absolute value of the difference between the distance and the second height is equal to or higher than the threshold height at which the measured value by the wind speed measuring unit is affected by the disturbance, the position of the wind speed measuring unit in the vertical direction is determined as the surface height of the sintering raw material layer. It adjusts to 2nd height by making it follow. Thereby, since the position in the vertical direction of the wind speed measuring unit can be accurately recognized, the position in the vertical direction of the wind speed measuring unit can be adjusted more accurately. Therefore, the wind speed can be accurately measured.

  Further, the wind speed measuring device may further include a correction processing unit that corrects the wind speed measured by the wind speed measuring unit. At this time, the correction processing unit corrects the wind speed measured by the wind speed measuring unit based on the driving speed of the height adjusting unit that adjusts the position of the wind speed measuring unit. Thereby, the wind speed can be measured with higher accuracy.

  For example, a thermal mass anemometer can be used for the wind speed measuring unit.

In order to solve the above-mentioned problem, according to another aspect of the present invention, a pallet group in which a plurality of pallets movable and loaded with a sintering raw material supplied from a raw material supply unit are connected endlessly; , An ignition part for igniting the sintered raw material loaded on the pallet, a plurality of window boxes arranged below the pallet group, and a lower end part of each window box, each window box and the gas in the window box A sintering machine is provided that includes an intake pipe that connects an intake portion that intakes air and a wind speed measuring device that measures the wind speed of any of the sintering raw material layers described above .

  As described above, according to the present invention, it is possible to provide a wind speed measuring device, a sintering machine, and a wind speed measuring method capable of stably measuring with high accuracy for a long period of time. By performing charging control of the sintering raw material, pallet speed control, and the like based on the measured in-layer passing wind speed, it becomes possible to produce sintered ore with high production and high yield.

It is a side view which shows schematic structure of the sintering machine concerning embodiment of this invention. It is a top view which shows schematic structure of the sintering machine concerning the embodiment. It is a schematic perspective view which shows the structure of the pallet concerning the embodiment. It is sectional drawing in the AA cutting line of FIG. It is a fragmentary top view which shows the installation method to the sintering machine of the wind speed measuring apparatus concerning the embodiment. It is a schematic perspective view which shows the example of 1 structure of the wind speed measuring apparatus concerning the embodiment. It is explanatory drawing which shows the motion of a 1st height adjustment mechanism. It is explanatory drawing which shows the motion of a 2nd height adjustment mechanism. It is explanatory drawing which shows the wind speed measuring method in a pan test. It is a graph which shows the relationship between the exhaust gas pressure in a pan test, passing wind speed, exhaust gas flow volume, and time. It is explanatory drawing which shows the wind speed measurement position in the sintering machine concerning the embodiment. It is a graph which shows the measurement result in the wind speed measurement position P1 in a sintering machine. It is a graph which shows the measurement result in the wind speed measurement position P2 in a sintering machine. It is a graph which shows the measurement result in the wind speed measurement position P3 in a sintering machine. It is a graph which shows the measurement result in the wind speed measurement position P4 in a sintering machine. It is a graph which shows the measurement result in the wind speed measurement position P5 in a sintering machine. It is a graph which shows the measurement result in the wind speed measurement position P6 in a sintering machine. It is a graph which shows the measurement result in the wind speed measurement position P7 in a sintering machine. It is a flowchart which shows the height adjustment operation | movement of a wind speed measuring apparatus provided with a distance sensor.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

(Schematic configuration of sintering machine)
First, based on FIGS. 1-4, the structure of the sintering machine 100 concerning embodiment of this invention is demonstrated. FIG. 1 is a side view showing a schematic configuration of the sintering machine 100 according to the present embodiment. FIG. 2 is a plan view showing a schematic configuration of the sintering machine 100 according to the present embodiment. FIG. 3 is a schematic perspective view showing the configuration of the pallet according to the present embodiment. 4 is a cross-sectional view taken along the line AA in FIG.

  As shown in FIG. 1, the sintering machine 100 according to the present embodiment includes a pallet group including a plurality of pallets 110, a raw material supply hopper 120, an ignition furnace 130, and a wind box 140.

  The pallet group is configured by connecting a plurality of pallets 110 that load and convey the sintering raw material 5 (see FIG. 4) so as to be movable in the longitudinal direction of the sintering machine 100. As shown in FIGS. 1 and 2, each pallet 110 has a leading end and a trailing end connected to each other, and circulates in the sintering machine 100 endlessly according to the rotation of the driving rollers 102a and 102b. In FIG. 1, the drive rollers 102a and 102b rotate counterclockwise, so that the pallet group rotates counterclockwise.

  Each pallet 110 constituting the pallet group includes a plurality of great bars 112, sidewalls 114, and wheels 116, as shown in FIG. The great bars 112 are arranged in the y direction and the x direction, and constitute a substantially rectangular bottom surface of the pallet 110. At this time, a gap for communicating with the window box is formed between the great bars 112 adjacent in the x direction by notches (not shown) formed in each of the great bars 112. The sidewalls 114 are wall plates provided on both sides in the x direction of the bottom surface constituted by the plurality of great bars 112. The sidewall 114 prevents the sintering raw material placed on the pallet 110 and the generated sintered ore from falling. Four wheels 116 for moving in the longitudinal direction of the sintering machine are provided on the outer surface of the sidewall 114.

  The raw material supply hopper 120 is a raw material supply unit that supplies a sintered raw material 5 containing coke powder that is a raw material of sintered ore. The raw material supply hopper 120 is provided on the upstream side in the rotation direction of the pallet group with respect to the position of the ignition furnace 130. The sintered raw material 5 supplied from the raw material supply hopper 120 is accommodated in the accommodating space of the pallet 110 that passes below the raw material supply hopper 120 and is conveyed in the traveling direction of the pallet group.

  The ignition furnace 130 is an ignition unit that ignites the sintered raw material 5 loaded on the pallet 110. The fuel material loaded on the pallet 110 facing the ignition furnace 130 is ignited, and the sintering process of the sintered material 5 is started.

  The wind box 140 constitutes a decompression space for sucking the pallet 110 loaded with the sintering material 5 from below. The wind box 140 is a space provided below the pallet 110 as shown in FIG. 4, which is a sectional view taken along the line AA in FIG. 2, and the upper side 142 communicates with the lower part of the bottom surface of the pallet 110. The lower end side 144 communicates with the intake pipe 145. The wind box 140 is connected to a blower (not shown) via an intake pipe 145, and the internal space of the wind box 140 is decompressed by being sucked / exhausted by the blower.

  During the circulation of the pallet group, first, the sintered raw material 5 is supplied from the raw material supply hopper 120 to each pallet 110, and the conveyance of the sintered raw material 5 is started. Next, the sintered raw material 5 loaded on the pallet 110 is ignited by the ignition furnace 130 and is taken in by a blower (not shown) through the wind box 140 and the intake pipe 145. Thereby, while a pallet group moves, a combustion zone is advanced below from the upper surface of a sintering raw material layer, and a sintered ore is manufactured continuously. The generated sintered ore is discharged from the pallet 110 when the pallet 110 reaches the discharge portion. The pallet 110 from which the sintered ore is discharged is circulated to the raw material supply hopper 120 and conveyed.

  The schematic configuration of the sintering machine 100 according to the present embodiment has been described above. Here, the inventors of the present application at each location in the sintering machine width direction (x direction) on the sintering material layer of the sintering machine 100 and each location in the sintering machine length direction (pallet moving direction: y direction). Using a commercially available hot-wire anemometer, an experiment was conducted to measure the passing wind speed when the measurement height position from the sintered raw material layer surface 5a was changed. As a result, it was found that if the anemometer is installed close to the sintering raw material layer surface 5a, the wind speed can be measured with high accuracy without being substantially affected by the crosswind. By not being affected by the crosswind, a large crosswind prevention mechanism such as a wind box or a current plate is not required. As a result, there is no concern about pressure loss of the current plate or the like, and the seal member for preventing air leakage provided at the lower portion of the wind box is also unnecessary. Therefore, it is possible to measure the passing air speed of the sintering material layer with an extremely simple apparatus configuration.

  However, it has also been found that if the distance between the anemometer and the sintering raw material layer surface 5a changes, a large measurement difference occurs in the measured value. For example, in the same location in the width direction of the sintering machine and the length direction of the sintering machine, the passing wind speed was measured at a position where the height from the sintering raw material layer surface 5a to the anemometer was about 30 mm and a position of about 50 mm. A measurement error of about 10 to 20% occurred in the measured value. For this reason, in order to accurately measure the passing air speed of the sintering material layer, it is necessary to keep the distance from the sintering material layer surface 5a constant.

  Therefore, by maintaining the distance from the sintering raw material layer surface 5a of the anemometer at a position close to the sintering raw material layer surface 5a in the sintering machine 100 according to the present embodiment, the influence of the cross wind that becomes a disturbance. A wind speed measuring device 160 that can stably measure the passing air speed of the sintered raw material layer is installed at a position that hardly receives the air, and the passing air speed on the sintered raw material layer is measured. Hereinafter, based on FIGS. 4-8, the structure and effect | action of the wind speed measuring apparatus 160 concerning this embodiment are demonstrated. FIG. 5 is a partial plan view showing a method of installing the wind speed measuring device 160 according to the present embodiment on the sintering machine 100. FIG. 6 is a schematic perspective view showing a configuration example of the wind speed measuring device 160 according to the present embodiment. FIG. 7 is an explanatory view showing the movement of the first height adjusting mechanism. FIG. 8 is an explanatory view showing the movement of the second height adjusting mechanism.

(Installation of wind speed measuring device)
As shown in FIG. 4, the wind speed measuring device 160 according to the present embodiment is provided on the sintering material layer and measures the passing wind speed at a predetermined position of the sintering machine 100. The wind speed measuring device 160 is supported by a support mechanism 150 including a support column 151 provided around the sintering machine 100 and a horizontal support unit 152 that connects the support column 151 and the wind speed measuring device 160. The support column 151 of the support mechanism 150 is provided perpendicular to the installation surface of the sintering machine 100. The support column 151 supports one end of the horizontal support unit 152 so as to be rotatable about the support column 151 as a rotation axis, and is supported so as to be movable in the extending direction of the support column 151 (that is, the z direction). One end of the horizontal support portion 152 is supported by the support column 151, and the other end supports the wind speed measuring device 160.

  In the off-line state in which the wind speed measurement is not performed, the horizontal support 152 is moved around the support column 151 so as to be substantially parallel to the length direction of the sintering machine. It is left at the position A in FIG. Then, when the on-line state for measuring the wind speed is entered, the horizontal support portion 152 is moved in the z direction along the support column 151, and the wind speed measuring device 160 is raised to a position where it does not contact the sidewall 114. And the horizontal support part 152 is rotationally moved to the position B which is a measurement position on the sintering raw material layer of the sintering machine 100 with the support column 151 as a rotation axis. When the wind speed measuring device 160 is positioned on the position B, the horizontal support portion 152 is moved in the z direction along the support column 151, and the wind speed measuring device 160 is placed on the sintering raw material layer.

  When the wind speed measuring device 160 is placed on the sintering material layer, the measurement of the passing wind speed by the anemometer is started. By such a simple support mechanism 150, the wind speed measuring device 160 can be easily moved between the offline position (position A) and the online position (position B). It is possible to carry out wind speed measurement.

(Configuration of wind speed measuring device)
The wind speed measuring device 160 according to the present embodiment is configured as shown in FIG. The wind speed measuring device 160 includes an anemometer 170 that measures the wind speed, and an adjustment mechanism that supports the anemometer 170 and adjusts the height from the sintering material layer. As the anemometer 170, for example, a hot-wire anemometer that is a thermal mass anemometer that is small and hardly disturbs the measurement environment can be used, and a commercially available one may be used.

  The detection unit that detects the wind speed of the hot-wire anemometer includes a temperature measuring element that measures the ambient temperature, and a heating element that includes a heater and a temperature measuring device. The heating element is heated and controlled by the heater so that a constant temperature difference is always obtained with respect to the ambient temperature measured by the temperature measuring element. The heater is supplied with the same amount of heat as the amount of heat dissipated by the cooling action of the wind. That is, the amount of heat released by the cooling action of the wind and the amount of heat supplied by the heater are always in an equilibrium state, and the wind speed can be calculated by measuring the amount of supplied heat. The temperature measuring element and the heating element are exposed to the atmosphere at the measurement position. At this time, the temperature measuring element and the heating element are arranged in the height direction (z direction) of the sintering raw material layer in the order of the heating element and the temperature measuring element from the sintering raw material layer side.

  As shown in FIG. 6, the anemometer 170 is fixed to one end of a vertical support part 161 connected via a horizontal support part 152 of the support part 150 and a second height adjustment mechanism 162. The vertical support 161 is supported by the horizontal support 152 so as to be movable in the vertical direction (z direction) by the second height adjustment mechanism 162. The vertical support portion 161 is also supported by four wheels 163 placed on the sintering raw material layer via the support portion 165.

  More specifically, as shown in FIG. 6, the support portion 165 includes a first support portion 165 a to which the vertical support portion 161 is fixed, and a second support that connects the first support portion 165 a and each wheel. Part 165b. The first support portion 165a is orthogonal to the vertical support portion 161 extending in the vertical direction, and includes a horizontal support member to which the vertical support portion 161 is fixed, and vertical support members extending in the vertical direction from both ends of the horizontal support member. Become. The second support part 165b is orthogonal to the vertical support member of the first support part 165a and the longitudinal direction of the sintering machine, the horizontal support member to which the vertical support member of the first support part 165a is fixed, and Each of the horizontal support members includes a vertical support member that extends in the vertical direction from both ends and is provided with a wheel 163 at the tip thereof via a first height adjustment mechanism 164.

  The first height adjustment mechanism 164 adjusts the height of the anemometer 170 with respect to small irregularities (for example, irregularities of less than about ± 5 mm) on the sintering material layer. The first height adjustment mechanism 164 absorbs small irregularities on the sintering material layer, and the wind speed is adjusted so that the distance from the bottom surface of the pallet 110 on which the sintering material 5 is loaded to the anemometer 170 is substantially constant. It functions as an absolute height adjuster that adjusts the height of the meter. The first height adjusting mechanism 164 reduces the influence on the measurement value due to the vibration of the anemometer 170 by preventing the anemometer 170 from following the surface change of the sintering raw material layer.

  In the first height adjusting mechanism 164, as shown in FIG. 7A, the first base portion 164a that rotatably supports the rotating shaft 163 of the wheel 163 rotates around the rotating shaft 164c. It is configured to be possible. The rotating shaft 164c is rotatably supported by a second base portion 164b connected to the second support portion 165b. By providing the first height adjustment mechanism 164 having such a configuration, it is possible to adjust the variation in the height of the wheel 163 within a range in which the first base portion 164a can rotate around the rotation shaft 164c. it can.

  That is, normally, as shown in FIG. 7A, the wheel 163 rotates with the rotating shaft 163a of the wheel 163 positioned closer to the sintering raw material layer than the rotating shaft 164c of the first base portion 164a. Suppose that When the sintering raw material layer is increased by the height h, as shown in FIG. 7B, the wheel 163 is pushed up, and the first base portion 164a is forwardly rotated around the rotation shaft 164c (clockwise in FIG. 7). And the height of the wheel 163 is raised by h. At this time, the height of the second base portion 164b does not change before and after the height of the sintering material layer changes. As described above, the first height adjusting mechanism 164 absorbs small irregularities on the sintering raw material layer and prevents the anemometer 170 from following the surface change of the sintering raw material layer. The minute unevenness of the surface 5a does not vibrate in the vertical direction. Thereby, it can suppress that the anemometer 170 always vibrates in the vertical direction, and the influence on the measurement value due to the vibration of the anemometer 170 can be reduced.

  On the other hand, the second height adjustment mechanism 162 has a high height of the anemometer 170 with respect to large unevenness (for example, unevenness of about +5 mm or more) on the sintered raw material layer that cannot be absorbed by the first height adjustment mechanism 164. Adjust the height. The second height adjustment mechanism 162 moves the vertical support portion 161 that supports the anemometer 170 in the vertical direction (z direction) so as to follow the height of the sintering raw material layer surface 5a. It functions as a height adjustment unit that adjusts the height of 170.

  As shown in FIG. 8, the vertical support portion 161 is inserted into a through hole 162 c that penetrates in the vertical direction of the connection portion 162 a fixed to the horizontal support portion 152. The end of the vertical support 161 opposite to the end to which the anemometer 170 is fixed has a diameter larger than the diameter of the through hole through which the vertical support 161 is inserted with the connection 162a interposed therebetween. A stopper 162b is provided. That is, the stopper 162b does not pass through the through hole 162c but can contact the connecting portion 162a, thereby preventing the vertical support portion 161 from moving in the vertical direction.

  As shown in FIG. 8A, the second height adjusting mechanism 162 is normally in a state in which the stopper 162b is in contact with the connecting portion 162a. While the change in the surface height of the sintering raw material layer is absorbed by the first height adjustment mechanism 164, the second height adjustment mechanism 162 does not operate. However, when the unevenness of the surface of the sintering raw material layer becomes large and the first height adjusting mechanism 164 cannot absorb the fluctuation of the height, as shown in FIG. The support part 161 is pushed up, and the anemometer 170 is moved vertically upward. In this way, the height of the anemometer 170 can be changed following the fluctuation of the surface height of the sintering material layer, and the height from the sintering material layer surface 5a to the anemometer 170 is kept substantially constant. can do.

  Further, if the height of the anemometer 170 is not changed following the surface height of the sintering raw material layer when the surface height of the sintering raw material layer is largely changed, the anemometer 170 is brought into contact with the sintering raw material layer. there's a possibility that. By actuating the second height adjusting mechanism 162, the contact between the sintering raw material layer and the anemometer 170 can be prevented, and the anemometer 170 can be prevented from being damaged.

  Thereafter, when the height of the sintered raw material layer is restored, the vertical support portion 161 moves in the vertically downward direction until the stopper 162b comes into contact with the connection portion 162a. When the stopper 162b comes into contact with the connecting portion 162a, the first base portion 164a of the first height adjusting mechanism 164 rotates in the reverse direction (counterclockwise in FIG. 7) from the state of FIG. 7B. Returning to the state of FIG.

  The wheel 163 is preferably formed of a heat-resistant material that can be used at about 100 ° C. or lower because it contacts the sintered raw material layer. Further, the wheel 163 is formed of a material having moderate elasticity so as to easily absorb vibrations and impacts due to the unevenness of the surface of the sintered material layer, and wear resistance enough to withstand the hardness of the sintered material. It is good to do. As a material of such a wheel 163, for example, urethane, MC nylon (registered trademark), a special phenol resin with high heat resistance, or the like can be used.

  The configuration of the wind speed measuring device 160 has been described above. According to the wind speed measuring device 160 according to the present embodiment, the first height adjusting mechanism that adjusts the height of the anemometer 170 in order to keep the height from the sintering raw material layer surface 5a to the anemometer 170 constant. 164 and a second height adjustment mechanism 162. When the sintering raw material has a particle size variation of about or more and the unevenness of the sintering material layer is small, the first height adjusting mechanism 164 is activated to absorb the unevenness, and the absolute height of the anemometer 170 is Prevent frequent fluctuations. Thereby, a stable measurement value can be acquired by the anemometer 170. On the other hand, if there is a large variation in the surface height of the sintering raw material layer having a long period not less than the radius of the wheel 163 that cannot be absorbed by the first height adjustment mechanism 164, the second height The height adjusting mechanism 162 is operated to cause the vertical position of the anemometer 170 to follow the surface height of the sintering raw material layer. Thereby, it can prevent that the measurement error by the position in the vertical direction of the anemometer 170 from the sintering raw material layer surface 5a differs arises.

  The wind speed measuring device 160 having such a configuration hardly affects the anemometer 170 even if a mechanism for preventing the influence of the cross wind and a mechanism for rectifying the wind are not provided as in the prior art. By providing it at a position slightly spaced from the sintering raw material layer surface 5a in the vertical direction, the wind speed can be measured stably with high accuracy over a long period of time. Therefore, it is possible to measure the passing air speed on the sintering raw material layer with a simple configuration as compared with the conventional large configuration, and it is possible to suppress the installation space and the installation cost.

  Note that the second height adjustment mechanism 162 according to the present embodiment may include a movement speed sensor (not shown) that measures the movement speed of the anemometer 170 in the vertical direction. A moving speed sensor is provided, and by measuring the moving speed of the anemometer 170 in the vertical direction, the passing wind speed measured by the anemometer 170 is corrected by a correction processing unit (not shown), thereby allowing more accurate passage. It becomes possible to acquire the wind speed. The moving speed sensor can be composed of a laser distance meter, a voice coil type electromagnetic sensor, or the like that can respond at a sufficiently high speed.

  That is, when the anemometer 170 is moving vertically upward, it is considered that the passing wind speed measured by the anemometer 170 is larger than the actual value. Therefore, a more accurate passing wind speed can be acquired by subtracting and correcting the speed measured by the moving speed sensor from the passing wind speed measured by the anemometer 170. On the other hand, when the anemometer 170 is moving vertically downward, it is considered that the passing wind speed measured by the anemometer 170 is smaller than the actual value. In this case, a more accurate passing wind speed can be acquired by correcting the passing wind speed measured by the anemometer 170 by adding the speed measured by the moving speed sensor.

(Verification of effectiveness of wind speed measuring device)
In order to verify the effectiveness of the wind speed measuring device 160 according to the present embodiment, two tests were performed. Below, two test conditions and a test result are demonstrated.
<1. Wind speed measurement in pan test>
First, based on FIG. 9 and FIG. 10, the wind speed measurement result in the pan test will be described. In addition, FIG. 9 is explanatory drawing which shows the wind speed measuring method in a pan test. FIG. 10 is a graph showing the relationship between exhaust gas pressure, passing wind speed, exhaust gas flow rate and time in a pan test.

  In this test, assuming a sintering process of the sintering material with a sintering machine, the sintering material is burned using the cylindrical pot 200, and the passing air speed in the vicinity of the surface of the sintering material is measured by the wind speed sensor 210. It was measured by. The wind speed sensor 210 corresponds to the detection unit of the anemometer 170 of the wind speed measuring device 160.

  After charging the sintering raw material into the pan 200 as shown in FIG. 9, the sintering raw material was ignited to start sintering. By sucking air from below the pot 200, the combustion zone advances downward from the surface of the sintered raw material layer. At this time, the wind speed sensor 210 for measuring the wind speed at the center of the pan 200 was fixed at a position separated by t from the sintered raw material surface, and the wind speed was measured by the wind speed sensor 210. Here, the height H of the pan 200 is 550 mm, the inner diameter D is 210 mm, and the height t from the sintering raw material surface to the wind speed sensor 210 is 30 mm. For this condition, the position in the radial direction and the height direction in the pan 200 of the wind speed sensor 210 was changed, and the position where the wind speed was measured was selected from the result of measuring the wind speed. Possible disturbances affecting the measurement value of the wind speed sensor 210 include, for example, an updraft flowing near the pan surface, a downdraft from above due to suction, a wall effect that lowers the airflow resistance due to the wall surface of the pan 200, and the like.

  FIG. 10 shows changes over time in the wind speed, exhaust gas pressure, and exhaust gas flow rate measured by the wind speed sensor 210. In addition, the time of FIG. 10 shows the elapsed time after a sintering raw material was ignited. The measured value by the wind speed sensor 210 appears after about 100 seconds due to the time difference from when the sintered raw material is ignited until the wind speed sensor 210 is installed at the measurement position on the sintered raw material. As shown in FIG. 10, after about 100 seconds after the sintered raw material is ignited, the exhaust gas pressure starts to increase, and the exhaust gas flow rate also increases compared to after the start of measurement.

  Thereafter, the exhaust gas pressure becomes a substantially constant value after about 200 seconds. On the other hand, the exhaust gas flow rate starts to gradually increase after about 600 seconds after taking a substantially constant value for a while. At this time, the measured value by the wind speed sensor 210 also rises to follow as the exhaust gas flow rate increases. Here, the exhaust gas flow rate is a flow rate per unit area of the exhaust gas that has passed through the sintering raw material layer, and the wind speed measured by the wind speed sensor 210 on the sintering raw material layer corresponds to an increase or decrease in the exhaust gas flow rate over time. Is estimated to increase or decrease. In this test, it can be seen from the graph of FIG. 10 that the exhaust gas flow rate and the wind speed measured by the wind speed sensor 210 change following the estimation. Thus, as in the wind speed measuring device 160 described above, the wind speed is properly measured by the wind speed sensor 210 without being affected by the disturbance without providing a mechanism for preventing disturbance such as cross wind. Recognize.

<2. Wind speed measurement in sintering machine>
Next, the wind speed measurement result in the sintering machine will be described based on FIGS. In addition, FIG. 11 is explanatory drawing which shows the wind speed measurement position in the sintering machine 100 concerning this embodiment. 12 to 18 are graphs showing measurement results at each wind speed measurement position in the sintering machine 100.

  In this test, the passing wind speed on the sintering raw material layer was measured by an anemometer at a plurality of locations of the sintering machine 100. As shown in FIG. 11, the measurement locations are three locations (P1 to P3) on the ignition unit side and four locations (P4 to P7) on the discharge side. By measuring on the lower point side and the discharge side, the difference in wind speed before and after the sintering proceeds can be confirmed. Moreover, the influence of the disturbance in a measurement position, etc. can be confirmed by measuring in the position where a width direction differs in a point lower part side and a discharge side, respectively. At each measurement position, the wind speed was measured at a position 30 mm high from the surface of the sintering raw material layer. Further, measurement was performed until 10 pallets passed at measurement positions P1 to P3 and P4 to P7, and measurement was performed until 11 pallets passed at measurement position P4.

  First, looking at the wind speed measurement results at the lower point side with reference to FIGS. 12 to 14, the average wind speed at each measurement position is about 0.166 m / s (P1), about 0.131 m / s (P2), about 0. 120 m / s (P3), showing almost the same value. The difference in measurement values due to the difference in the position in the width direction of the sintering machine 100 was not large, but this is because the measurement positions P1 and P3 at both ends of the three measurement points are sufficiently separated from the sidewall. it is conceivable that.

  Next, looking at the wind speed measurement results on the exhaust side with reference to FIGS. 15 to 18, the average wind speed at each measurement position is about 0.432 m / s (P4), about 0.653 m / s (P5), about It became 0.567 m / s (P6) and about 0.735 m / s (P7). The average wind speed on the discharge side was higher than the average wind speed on the ignition section side. From this, it can be seen that the sintering of the sintering material proceeds and the air permeability of the sintering material is increased.

  Further, the average wind speed is different depending on the position in the width direction. Compared to the average wind speed at the measurement position P5 farthest from the sidewalls on both sides, the average wind speed at the measurement positions P4 and P6 on both sides is reduced. At any measurement position P4 to P6, although the magnitude of the wind speed changes gradually with the passage of time, the average wind speed is almost an intermediate value of the wind speed at each time. On the other hand, the average wind speed at the measurement position P7 close to the sidewall is larger than that at the measurement position P5, and the variation in the magnitude of the wind speed due to changes over time varies greatly. From these measurement results, it is difficult to measure an appropriate wind speed at the measurement position P7 close to the sidewall due to the influence of the sidewall, etc., but at the other measurement positions P4 to P6, an appropriate wind speed should be measured. It is understood that is possible.

  As described above, as in the wind speed measuring device 160 according to the present embodiment, the wind speed is measured with the anemometer 170 close to the sintering raw material layer surface 5a and the height from the sintering raw material layer surface to the anemometer 170 being constant. By doing so, it is possible to appropriately monitor the progress of the sintering process. Further, if the position is not too close to the sidewall as in the measurement position P7, the wind speed can be measured almost without being affected by disturbance even if a large-scale apparatus such as the wind speed measuring apparatus 160 according to the present embodiment is not provided. It was shown that you can.

(Another configuration example of the wind speed measuring device)
As described above, the wind speed measuring device 160 according to the present embodiment includes the first height adjusting mechanism 164 and the second height adjusting mechanism 162 in order to adjust the height of the anemometer 170. These height adjustment mechanisms mechanically adjust the height of the anemometer 170, and actually adjust the height by measuring the distance between the sintering raw material layer surface and the anemometer 170. is not. Therefore, in order to more accurately measure the height of the anemometer 170 from the surface of the sintering raw material layer and adjust the position of the anemometer 170 with high accuracy, the anemometer 170 includes the surface of the sintering raw material layer and the anemometer 170. A distance sensor for measuring the distance between the two may be provided.

  As the distance sensor, for example, a laser distance meter can be used. At this time, a control unit (not shown) for determining whether or not to adjust the height of the anemometer based on the distance between the sintered raw material layer surface and the anemometer detected by the distance sensor; It is good to provide the drive part (not shown) which fluctuates the height of an anemometer when it determines with adjusting the height of an anemometer by a control part. Thereby, the height of the anemometer can be changed according to the detection distance. As the drive unit, for example, an electric cylinder can be used.

  FIG. 19 shows a method for adjusting the height of a wind speed measuring device including a distance sensor. First, the distance in the height direction from the sintering raw material layer surface to the anemometer is detected by the distance sensor (step S110). Next, the control unit compares the absolute value of the difference between the detection distance detected by the distance sensor and the target distance with the threshold height (step S120). Here, a threshold value can be prescribed | regulated by the magnitude | size of the unevenness | corrugation of the sintering raw material layer surface which cannot measure a wind speed appropriately with an anemometer. For example, the threshold height can be about 5 mm.

  If it is determined in step S120 that the absolute value of the difference between the detected distance and the target distance is less than the threshold height, the height of the anemometer is not adjusted, that is, not followed (step S130). On the other hand, if it is determined in step S120 that the absolute value of the difference between the detection distance and the target distance is greater than or equal to the threshold height, for example, the above-described second height adjustment mechanism is driven by the drive unit ( Step S140). Thereby, the position of the height direction of an anemometer can be moved so that the surface height of a sintering raw material layer may be followed.

  Even if the first height adjustment mechanism and the second height adjustment mechanism described above are not provided, the anemometer automatically follows the surface of the sintering raw material layer by driving the drive unit according to the flowchart shown in FIG. Can be made. Furthermore, when the anemometer is automatically followed by the drive unit, the passing wind speed measured by the anemometer is corrected using the movement amount and moving speed of the anemometer by the driving unit to obtain a more accurate passing wind speed. You can also.

  That is, when the anemometer is moved vertically upward by the drive unit, the passing wind speed measured by the anemometer is considered to be larger than the actual value. Therefore, a more accurate passing wind speed can be acquired by subtracting and correcting the moving speed by the drive unit from the passing wind speed measured by the anemometer. On the other hand, when the anemometer is moved vertically downward by the drive unit, it is considered that the passing wind speed measured by the anemometer is smaller than the actual value. In this case, a more accurate passing wind speed can be acquired by correcting the passing wind speed measured by the anemometer by adding the moving speed by the drive unit.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the above embodiment, the anemometer 170 is supported by the support unit 165 including the four wheels 163, but the present invention is not limited to such an example. For example, the number of wheels 163 may be three or more. Further, for example, a wind speed measuring device may be provided so as not to be placed on the sintered raw material layer as in the above embodiment, but to be suspended from above the sintered raw material layer. At this time, the anemometer is provided with a distance sensor for measuring the vertical distance between the sintering raw material layer surface 5a and the anemometer, and the anemometer height is determined depending on whether or not the measured distance exceeds the threshold height. The thickness may be adjusted.

  The present invention can also be applied to a wind speed measuring device that measures the passing air speed of the sintering raw material layer in the sintering process, which is the upper process of the steel industry, and a wind speed measuring device in other processes in the steel industry and similar processes in other industries. It is.

5 Sintering raw material 100 Sintering machine 102a, 102b Driving roller 110 Pallet 120 Raw material supply hopper 130 Ignition furnace 140 Wind box 145 Intake pipe 150 Support mechanism 160 Wind speed measuring device 162 Second height adjustment mechanism 163 Wheel 164 First height Adjusting mechanism 170 Anemometer

Claims (7)

A wind speed measuring device for measuring the wind speed of a sintering material layer of a sintering machine,
It is supported by a support mechanism comprising a support provided around the sintering machine and a horizontal support supported by the support,
A moving part that is in contact with the surface of the sintering material layer loaded on the bottom surface of the pallet of the sintering machine and is movable relative to the sintering material layer that moves together with the pallet;
Above the sintering material layer, a wind speed measuring unit for measuring the wind speed in the vertical direction,
A support unit supported by the moving unit and supporting the wind speed measurement unit;
A second height adjusting unit that maintains a distance between the wind speed measuring unit and the surface of the sintering material layer in the vertical direction at a second height;
With
The second height adjusting unit is inserted into a through-hole formed in the horizontal support unit and penetrating in the vertical direction, the wind speed measuring unit is provided at one end on the lower side in the vertical direction, and one end on the upper side in the vertical direction. It consists of a vertical support with a stopper,
While the magnitude of the fluctuation of the surface height of the sintering raw material layer is less than the threshold height at which the measurement value by the wind speed measurement unit is affected by disturbance, the stopper of the vertical support unit is Abuts the through hole,
When the magnitude of the fluctuation of the surface height of the sintering raw material layer is equal to or higher than a threshold height at which the measurement value by the wind speed measurement unit starts to be affected by disturbance, the stopper rises with respect to the horizontal support unit. The wind speed measuring device which keeps the position in the vertical direction of the wind speed measuring unit at the second height by following the surface height of the sintering raw material layer. A first height adjusting unit that holds the position of the wind speed measuring unit in the vertical direction with respect to the bottom surface of the pallet of the sintering machine on which the sintering raw material is loaded at a first height;
The first height adjusting unit includes a first base unit that supports the moving unit, and a second base that is connected to the support unit and rotatably supports the first base unit. And consists of
When the magnitude of the fluctuation of the surface height of the sintering raw material layer is less than the threshold height, the first base portion of the first height adjustment portion rotates with respect to the second base portion. The wind speed measuring apparatus according to claim 1, wherein the wind speed measuring apparatus moves and absorbs a change in a vertical position of the wind speed measuring unit with respect to a bottom surface of the pallet of the sintering machine. A moving speed detector for detecting the moving speed in the vertical direction of the wind speed measuring unit;
A correction processing unit that corrects the wind speed measured by the wind speed measuring unit;
Further comprising
The wind speed measuring device according to claim 1 or 2, wherein the correction processing unit corrects the wind speed measured by the wind speed measuring unit based on the moving speed detected by the moving speed detecting unit. A wind speed measuring device for measuring the wind speed of a sintering material layer of a sintering machine,
It is supported by a support mechanism comprising a support provided around the sintering machine and a horizontal support supported by the support,
A moving part that is in contact with the surface of the sintering material layer loaded on the bottom surface of the pallet of the sintering machine and is movable relative to the sintering material layer that moves together with the pallet;
Above the sintering material layer, a wind speed measuring unit for measuring the wind speed in the vertical direction,
A support unit supported by the moving unit and supporting the wind speed measurement unit;
A second height adjusting unit that maintains a distance between the wind speed measuring unit and the surface of the sintering material layer in the vertical direction at a second height;
With
The second height adjusting unit is
A distance detection unit that detects a distance between the wind speed measurement unit and the surface of the sintering material layer in the vertical direction;
A control unit for determining whether to adjust the height of the wind speed measuring unit;
A drive unit for varying the height of the wind velocity measuring unit when determining to adjust the height of the wind velocity measuring section by the control section,
With
The second height adjustment unit is configured such that an absolute value of a difference between the detection distance detected by the distance detection unit and the second height is a threshold height at which a measurement value by the wind speed measurement unit is affected by disturbance. When it becomes above, the wind speed measuring apparatus which adjusts the position in the perpendicular direction of the said wind speed measurement part to the said 2nd height by following the said sintering raw material layer surface height. A correction processing unit for correcting the wind speed measured by the wind speed measuring unit;
The wind speed measuring device according to claim 4, wherein the correction processing unit corrects the wind speed measured by the wind speed measuring unit based on a driving speed of the height adjusting unit that adjusts a position of the wind speed measuring unit.   The wind speed measuring device according to any one of claims 1 to 5, wherein the wind speed measuring unit is a thermal mass anemometer. A pallet group in which a plurality of pallets movable and loaded with sintering raw materials supplied from a raw material supply unit are connected endlessly;
An ignition part for igniting the sintered raw material loaded on the pallet;
A plurality of window boxes disposed below the pallet group;
An intake pipe connected to a lower end portion of each window box, and connecting each window box and an intake portion for taking in gas in the window box;
The wind speed measuring device according to any one of claims 1 to 6, which measures the wind speed of the sintered raw material layer,
A sintering machine comprising:

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