KR20150062705A - Device and method for measuring surface profile of charging meterials - Google Patents

Abstract

According to a problem to be solved, surface profile of various charging materials inserted into equipment such as a blast furnace, storage, or the like can be instantaneously measured on a side or a line, and further charging control is possible during measurement, enabling quick charging control to be performed in accordance with measured profile. According to a solution, the present invention comprises: a pressurized container arranging at least one transmitting unit for transmitting a detection medium and a plurality of receiving units for receiving a detection medium on a side or a line on one surface; a transmitting means accessing the transmitting unit to control transmission of a detection medium; a receiving means accessing each receiving unit to send a receiving signal to an radar imaging processing means; and the radar imaging processing means accessing the receiving units. In a single opening formed near a top portion of equipment, a container is hermetically mounted for the transmitting unit and the receiving units to head for charging materials. Moreover, provided is a device for measuring surface profile of charging materials, which is transmitted from the transmitting unit, receives a detection medium reflected in charging materials from the receiving units, and processes a receiving signal with the radar imaging processing means.

Description

TECHNICAL FIELD [0001] The present invention relates to a device for measuring a surface profile of a charged object,

The present invention relates to a surface profile of various kinds of materials charged into facilities such as iron ores and cokes in a furnace, molten steel in a furnace, coal in a hopper, refuse in an incinerator, grain in a storage such as a silo, Light) or the like and a device for the same.

BACKGROUND ART Conventionally, a detection medium such as a microwave, a sound wave, or a light is transmitted toward a charge charged in a facility, a detection medium reflected from the surface of the charge is received, and a received signal is analyzed to measure the surface profile of the charge have. Among them, the microwave is suitable for the measurement of the surface profile of iron ore or coke in the furnace, for example, because it can be applied to an environment such as high-temperature charging water or steam.

In furnaces, iron ore and coke are usually charged alternately from the top of the furnace, and the charging operation is performed so that the surface profile of the charge in the furnace portion becomes an inverted pyramidal shape like an anthem. In such a blast furnace, by forming a proper charge distribution, the gas flow in the furnace is stabilized, and the fuel cost can be reduced and the longevity of the furnace body can be increased.

In order to properly control the charge distribution, it is necessary to accurately measure the surface profile of the charge in a short period of time and adjust the charge of the charge appropriately in accordance with the change in the sulfur content. As a measurement method of the surface profile, as shown in Fig. 9, from the antenna 11 mounted on the tip of the lance 10 inserted into the furnace through the furnace 1 toward the surface of the furnish 20 The microwave M1 is emitted from the antenna 11 and the reflected microwave M2 from the surface of the charge 20 is received by the antenna 11 and mixed by the frequency of the beat wave, A method of measuring the distance to the surface of the water 20 is common and the surface profile of the charge 20 is obtained by measuring while moving the lance 10 (see, for example, Non-Patent Document 1) .

However, since the length of the lance 10 is required to be equal to the inner diameter of the furnace, and since the furnace 10 is long and has a high load, if it is inserted long in the furnace, the lance 10 will not fall out of the furnace due to its own weight, A large space is required. In addition, a driving device for moving the lance 10 is additionally required. Since the lance 10 has a long length, the driving device also has its own size. Furthermore, the charging operation can not be performed during the profile measurement, and the charging operation according to the measured profile can not be performed quickly.

"Iron Research" No. 317, pp. 3-16

Therefore, it is an object of the present invention to provide an apparatus and method capable of instantly measuring the surface profile of various articles inserted into equipment such as a blast furnace or a storage room in the form of a surface or a line, And it is an object of the present invention to provide a measuring apparatus and a measuring method which enable quick loading operation according to one profile.

In order to achieve the above object, the present invention provides an apparatus and method for measuring a surface charge profile of a furnace shown below.

(1) An apparatus for measuring a surface profile of a charge by transmitting a detection medium toward a charge charged in a facility, receiving a detection medium reflected from the charge surface,

A container in which one or more transmitting sections for transmitting a detection medium and a plurality of receiving sections for receiving a detection medium are arranged on one surface in a plane or in a line,

A transmission unit connected to the transmission unit and controlling transmission of the detection medium,

Receiving means for respectively connecting to the respective receiving portions and for sending the received signals to the radar imaging processing means,

And the radar imaging processing means connected to the receiving means,

The container is mounted in a single opening formed near the top of the facility such that the transmitter and the receiver face the charge,

Wherein the receiving surface receives a detection medium transmitted from the transmission section and reflected from the charge to the receiving section and processes the received signal with the radar imaging processing means to measure the surface profile of the charge in a plane or on a line. Measuring device.

(2) The apparatus for measuring the surface profile of a charge according to (1), wherein the transmitting means, the receiving means and the radar imaging processing means are disposed outside the vessel.

(3) The apparatus for measuring the surface profile of a package according to (1) or (2), further comprising a lid member covering the transmitting section and the receiving section and also serving as opening and closing of the opening.

(4) The apparatus for measuring the surface profile of a charge according to (3), wherein the lid member is a slide valve that moves in the horizontal direction of the facility.

(5) The apparatus for measuring the surface profile of a charge according to (3), wherein the cover member is a swing valve that rotates in the axial direction of the facility.

(6) The container is movable up and down,

In the measurement, the lid member opens the opening, and the container descends so that the transmitter and the receiver become the measurement positions,

The apparatus for measuring the surface profile of a charge according to any one of (3) to (5), characterized in that the container is raised and the opening is closed by the lid member at the time of non-measurement.

(7) The apparatus for measuring the surface profile of a charge according to any one of (1) to (6), wherein the detection medium is microwave, millimeter wave, sound wave or light.

(8) The detection medium is a microwave, the microwave transmitting means and the transmitting antenna, the receiving means and the receiving antenna are connected to each other via a waveguide, the waveguide is accommodated in the container, The profile measuring device according to any one of (1) to (6), wherein only the antenna surface of the receiving antenna is exposed and mounted on the container.

(9) The apparatus for measuring the surface profile of a charge according to (8), wherein the transmission antenna, the reception antenna and the waveguide are gas purged.

(10) The method according to (8) or (9) above, wherein a plug member made of a microwave-permeable material is disposed (disposed) at a connecting portion of the waveguide with the transmitting means and the receiving means Surface profile measuring device.

(11) The apparatus for measuring the surface profile of a charge according to any one of (8) to (10), which is used for measuring the surface profile of iron ore and coke.

(12) A method for measuring a charge surface profile by transmitting a detection medium toward a charge charged in a facility and receiving a detection medium reflected from the charge surface,

A detection medium is transmitted from a transmitter to a charge by using the apparatus described in any one of (1) to (11) above, a detection medium reflected from the surface of the charge is received by a receiver, Characterized in that the surface profile of the charge is measured in a plane or a line by radar imaging processing.

According to the present invention, it is possible to measure the surface profile of the contents charged into the furnace over the entire surface, and the charging operation can be performed even during the profile measurement, and the charging operation can be performed promptly according to the measured profile. In addition, the entire apparatus can be reduced in size and weight, and the maintenance work can be performed safely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a basic configuration diagram showing a measuring section of a profile measuring apparatus according to the present invention. FIG.
2 is a view for explaining coordinates of an antenna and a target.
Fig. 3 is a conceptual diagram showing an example of a profile measuring apparatus, and is a diagram showing the arrangement of each constituent member at the time of measurement. Fig.
Fig. 4 is a view showing the arrangement of each component member in the non-measurement of the profile measuring apparatus shown in Fig. 3;
Fig. 5 is a conceptual diagram showing another example of the profile measuring apparatus, and shows the arrangement of the constituent members in the measurement. Fig.
Fig. 6 is a view showing the arrangement of each component member in the non-measurement of the profile measuring apparatus shown in Fig. 5;
Fig. 7 is a conceptual diagram showing still another example of the profile measuring apparatus, showing the arrangement of the respective constituent members at the time of measurement. Fig.
Fig. 8 is a view showing the arrangement of each component member in the non-measurement of the profile measuring apparatus shown in Fig. 7;
9 is a diagram showing an example of a conventional profile measuring apparatus.

Hereinafter, the case of measuring the surface profile of iron ore or coke in a blast furnace using a microwave as a detection medium will be described in detail with reference to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a basic configuration diagram showing a measuring section of a profile measuring apparatus used for measuring a surface profile of a charge according to the present invention. Fig. As shown in the drawing, the measuring unit 100 includes a transmitting unit 101 and a receiving unit 102. The measuring unit 100 receives a microwave from a single transmitting antenna 110 connected to the transmitting unit 101 toward a charge (not shown) And simultaneously receives the reflected microwave M2 reflected from the charge by the plurality of reception antennas 120. [

The receiving antennas 120 may be arranged in a plane or in a line as shown in the drawing. In the case of arrangement in the plane, the surface profile of the charge can be measured in the plane, and in the case of arrangement in the line, the charge surface profile can be measured linearly. In addition, the number of the receiving antennas 120 is not limited, but depends on the diameter of the furnace, that is, the area of the charge. However, considering the resolution of the profile, four or more are preferable per side. The narrower the distance D between the receiving antennas, the wider the profile can be measured. 90 占 in a ½ wavelength (¼ wavelength in the case of sharing a transmitting / receiving antenna). Further, if the reception antennas are arranged in a larger area, the resolution of the profile is improved. In addition, the plurality of reception antennas 120 are arranged in a square shape, but they may be arranged in a circular shape or any other shape.

A plurality of reception antennas 120 are disposed around the transmission antenna 110 and the reception antenna 120 around the transmission antenna 110. However, The transmitting antenna 110 may be disposed beside the receiving antenna group (group). It is also possible to use a plurality of transmission antennas 110 to simultaneously transmit the same specific microwave M1 from each transmission antenna 110. [

Furthermore, it is not necessary for all the plurality of reception antennas 120 to be the same, but when using another reception antenna 120, it is necessary to correct each reception signal by reception sensitivity of the reception antenna 120 or the like .

The microwave M1 transmitted from the transmitting antenna 110 is controlled by the control signal 132 from the frequency control means 131 of the control unit 130 and is transmitted at a predetermined frequency and output. A part of the transmission signal 133 is mixed with the reception signal 134 of each reflection microwave M2 received by the reception antenna 120 so that the bit signal 135 is received by the radar imaging processing means 136 ). In the radar imaging processing means 136, the following processing is performed.

First, the principle of distance measurement of the FMCW radar will be described. When the amplitude of the signal source is A, the frequency is f, and the speed of light is c, the transmission wave is expressed by the following expression (1). However, r is a variable indicating a range (distance) axis.

Assuming that the position of the kth target on the r axis is _dk , and the magnitude and phase of the reflection coefficient are? _K and? _K , respectively, the reflected wave from the target can be expressed by the following equation (2).

Since the range of the frequency f is finite, if the center is f ₀ and the width is f _W , the equation (3) is obtained.

Further, when f _d linearly changes with time (linear FM), the bit signal P (f _d ) obtained by mixing the transmission wave and the reflected wave can be expressed as a function of the frequency variation f _d by removing the time variable , And (4).

Then, the distance spectrum can be obtained by Fourier transforming the bit signal P (f _d ). Fourier transform formula (5) an expression, a (ω / 2π) to (2r / c), when substituted for f (t) by P (f _d), the distance spectrum P (r) of Formula (6) is obtained .

2, the coordinate of the transmitting antenna 110 is set as the origin (0, 0, 0), and the coordinate of the receiving antenna 120 at a certain position is set as (x, y, 0) a, and when the target of the reflection coefficient at position _{(x 0, y 0, z} 0) to g _{(x 0, y 0, z} 0) , the distance spectrum P is when limited to r> 0, (6) From equation (2) to equation (7). In addition, since there is no substantial influence, A ² f _w = 1 was set.

Since the target has some spatial spread, the distance spectrum P is obtained by integrating the equation (7) into three dimensions, and the equation (8) is obtained.

Further, equation (11) is obtained from equation (9).

(8), Sa (.) = 1 and r? R ₀ at the distance r = r ₀ where the target exists, Sa (ㆍ) | ≪ 1, the distance spectrum can be estimated as in the expression (12).

Since the right side of Eq. (12) is the product of the product of h and h, the distribution g (x ₀ , y ₀ , z ₀ ) of the reflection coefficient, ie, the three-dimensional image, can be obtained from Eq. (14). L _x and L _y are scanning ranges of the receiving antenna 120 in the x and y directions.

It is possible to instantaneously measure the surface profile of the charge in the form of a plane or a line by carrying out the series of processes to the radar imaging processing means 136 based on the reception signal 134 from each of the reception antennas 120. [ It is preferable that the reception antenna 120 has a narrower aperture on the antenna surface so as to receive a wider reflection microwave M2. It is preferable that the transmission antenna 110 also has a narrow aperture on the antenna surface so that the microwave M1 can be widely transmitted.

3, the measuring section 100 is provided with a transmitting antenna 110 and a receiving antenna (not shown) disposed above the opening 50 (space on the opposite side of the furnace) formed near the top of the furnace 1, 120 are inwardly directed toward the interior of the vessel 200. The transmitting antenna 110 is connected to the transmitting unit 101 through the transmitting waveguide 150 and the receiving antenna 120 is connected to the receiving unit 102 via the receiving waveguide 160. It is also possible to interpose a fluororesin stopper member 170 between the connecting portion of the transmitting portion 101 and the transmitting waveguide 150 and the connecting portion of the receiving portion 102 and the receiving waveguide 160. Dust entered from the transmission antenna 110 or the reception antenna 120 from the inside of the furnace is blocked by the stopper member 170 through the transmission waveguide 150 or the reception waveguide 160 to the transmission unit 101 or the reception unit 102), and it is possible to shut off the high-pressure environment and the outside of the furnace.

The transmission waveguide 150 and the reception waveguide 160 are accommodated in the metal container 200. This container 200 has a tight airtight structure and is provided on the bottom surface 201 of the container 200 as shown in part A of FIG. 3 (the container 200 is viewed from the inside thereof) Openings 205 and 206 having the same shapes as the antenna surfaces of the transmitting and receiving antennas 110 and 120 are formed to receive the antenna surface of the transmitting antenna 110 or the receiving antenna 120, , 206 and the antenna surface.

A gas inlet port 210 is formed in the transmission waveguide 150 and the reception waveguide 160 to supply nitrogen gas or the like (here, the reception waveguide 160 forms a gas inlet port 210) Gas may be purged. As described above, the transmitting antenna 110 and the receiving antenna 120 can use a small-diameter one, which makes it difficult for dust to enter from the furnace. Gas purging can more securely prevent dust from intruding, , And further, the inside of the tube is cleaned, so that microwave transmission and reception can be improved. Also, the inflow of heat from the inside of the furnace can be prevented.

Although the illustration is omitted, the same gas purging is also performed on the vessel 200, so that the heat from the furnace can be prevented from being transmitted to the measuring unit 100.

According to such a configuration, since the control unit 130 is disposed above the container 200, it is possible to protect various electronic components constituting the control unit 130 from high temperatures in the furnace.

The container 200 is lifted and lowered inside the opening 50 by the lifting device 220. The upper end of the metal bellows 230 is connected to the flange 207 of the container 200 and the lower end of the metal bellows 230 is connected to the upper end of the opening 50 ) 51, it is possible to prevent the high-pressure gas from leaking out of the furnace to the outside.

A slide valve 250 is disposed on a side portion of the container 200. The lid member 251 of the slide valve 250 is a flat plate and has a larger area than the bottom surface 201 of the container 200 and has an area covering the opening 50 and moves in the horizontal direction in the drawing.

3 is a view showing the arrangement of constituent members such as the measuring section 100 and the container 200 at the time of measurement. First, the lid member 251 of the slide valve 250 is horizontally moved Thereby opening the opening 50. In this state, the lifting device 220 is operated to lower the container 200 so that the bottom surface 201 comes to the measurement position. It should be noted that the measurement position may be such that the bottom surface 201 is the same as the opening 50 or the reflecting microwave M2 is slightly protruded to the inner side of the furnace at the peripheral end of the opening 50, It is possible to prevent noise from being reflected by the inner peripheral surface (thickness portion of the furnace 1)

Subsequently, the microwave M1 is transmitted from the transmission antenna 110, and the reception microwave M2 is received by the reception antenna 120 from the charge in the furnace. By performing the above processing on the radar imaging processing means 136 based on the received signal, the charge surface profile is measured.

Fig. 4 is a view showing the arrangement of constituent members at the time of non-measurement of the profile measuring apparatus shown in Fig. 3. After the measurement as described above, the elevating device 220 is operated to move the container 200 to the bottom (201) is positioned above the position of the lid member (251) of the slide valve (250). Then the slide valve 250 is operated to horizontally move the cover member 251 to the left side in the figure to the position where the cover member 251 covers the bottom surface 201 of the container 200 and closes the opening 50.

Thus, the state shown in Fig. 4 is waited for the next measurement.

Although not shown, slide valves may be stacked in two stages. When the container is lowered to the measurement position, the upper slide valve is opened, the bottom surface of the container is once stopped slightly above the lid member of the lower slide valve, and the lower slide valve is opened during the stop to drop to the original measurement position . On the other hand, after the measurement is completed, the container is raised, the bottom surface of the container is once stopped slightly above the lid member of the lower slide valve, and the lower slide valve is closed while the container is stopped. And then the upper slide valve is closed. By stacking the slide valves in two stages in this way, it is possible to shut off the furnace and the measuring device safely while operating the furnace, and the measuring device can be maintained.

As shown in Fig. 5, a seal 235 can be used instead of the metal bellows 230 in the present invention. The seal 235 is in contact with the outer circumferential surface of the container 200 and slides on the outer circumferential surface when the container 200 is lifted or lowered to secure airtightness.

The arrangement and operation of the components other than the seal 235 in measurement and non-measurement are as shown in Figs. 3 and 4. Fig.

In place of the slide valve 250, a swing valve may be used. 7, in the swing valve 260, the lid member 261 rotates (rotates) about the rotary shaft 162 in the axial direction (vertical direction in the figure) of the furnace 1. Further, the lid member 261 is formed into a U-shaped cross section in conformity with the shape of the container 200.

7 shows the state at the time of measurement. The lid member 261 is slid downward from the inside of the furnace to open the opening 50. When the lid member 261 is not measured, So as to surround the bottom surface 201 and the bottom of the container 200. As shown in Fig.

8, the bottom surface 201 of the container 200 is positioned above the position shown in Fig. 3 so that the lid member 261 is located above the opening 50 at the time of non-measurement. In this example, the container 200 is fixed so that the elevation device 220 is not required. However, if the measuring position is the same as the opening 50 as shown in Fig. 3, or if the elevation device 220 is slightly protruded, The container 200 is lowered.

As described above, in the present invention, the surface profile of iron ore or coke is measured by a microwave. However, it is also possible to measure the surface profile of the iron ore or coke in the same manner using microwaves, milliwaves, sound waves and light as detection media. In the case of using a sound wave, a speaker may be used instead of the transmission antenna, and a microphone may be used instead of the reception antenna. However, the waveguides 150 and 160 are not used, and are connected to the transmitting means and the receiving means by electric wires. In the case of using light, a light emitting element may be used instead of the transmitting antenna, a light receiving element may be used instead of the receiving antenna, and an optical guide such as an optical fiber may be used instead of the waveguide.

To 1
50 opening
100 measuring part
101 transmitter
102 receiver
110 transmission antenna
120 receiving antenna
130 controller
131 frequency control means
136 Radar imaging processing means
150 transmission waveguide
160 receiving waveguide
200 containers
250 slide valve
251 Lid member
260 Swing Valves
261 lid member

Claims (12)

An apparatus for measuring a surface profile of a charge by transmitting a detection medium toward a charge charged in a facility and receiving a detection medium reflected from the charge surface,
A container in which one or more transmitting sections for transmitting a detection medium and a plurality of receiving sections for receiving a detection medium are arranged on one surface in a plane or in a line,
A transmission unit connected to the transmission unit and controlling transmission of the detection medium,
Receiving means for respectively connecting to the respective receiving portions and for sending the received signals to the radar imaging processing means,
And the radar imaging processing means connected to the receiving means,
The container is mounted in a single opening formed near the top of the facility such that the transmitter and the receiver face the charge,
Wherein the receiving surface receives a detection medium transmitted from the transmission section and reflected from the charge to the receiving section and processes the received signal with the radar imaging processing means to measure the surface profile of the charge in a plane or on a line. Measuring device.
The method according to claim 1,
Wherein the transmitting means, the receiving means, and the radar imaging processing means are disposed outside the vessel.
3. The method according to claim 1 or 2,
And a lid member covering the transmitting section and the receiving section and serving also as opening and closing of the opening.
The method of claim 3,
Wherein the lid member is a slide valve that moves in a horizontal direction of the facility.
The method of claim 3,
Wherein the lid member is a swing valve that rotates in the axial direction of the facility.
The method of claim 3,
The container can be raised and lowered,
The container is lowered so that the lid member opens the opening and the transmitter and the receiver become measurement positions at the time of measurement,
And when the ratio is not measured, the container rises and closes the opening by the lid member.
3. The method according to claim 1 or 2,
Wherein the detection medium is a microwave, a milliwave, an acoustic wave, or a light.
3. The method according to claim 1 or 2,
Wherein the detection medium is a microwave, the microwave transmitting means and the transmitting antenna, the receiving means and the receiving antenna are connected to each other through a waveguide, the waveguide is accommodated in the container, and the transmitting antenna and the receiving Wherein only the antenna surface of the antenna is exposed and mounted on the container.
9. The method of claim 8,
Wherein the transmit antenna, the receive antenna and the waveguide are gas purged.
9. The method of claim 8,
Wherein a plug member made of a microwave-permeable material is disposed at a connection portion between said waveguide transmitting means and said receiving means.
9. The method of claim 8,
Characterized in that it is used for measuring the surface profile of iron ore, coke.
A method for measuring a surface profile of a charge by transmitting a detection medium toward a charge charged in a facility and receiving a detection medium reflected from the charge surface,
A detection medium is transmitted from a transmission unit toward a charge by using the apparatus according to claim 1 or 2, and the detection medium reflected by the surface of the charge is received by the reception unit, and the received signal is subjected to radar imaging processing Wherein the water surface profile is measured in a plane or a line.

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