JP2015172184A - Coke oven coal level measurement device - Google Patents

Abstract

In a coke oven coal level measurement device, it can be installed regardless of the distance between the sleeve of the coal charging chute and the coke oven, no means for moving the reflector is required, and further, dust and heat from the coke oven are not required. Prevent the effects of. In a coal-coating vehicle, a microwave or millimeter-wave transmission / reception means and an opening on the ceiling surface of a coal injection chute are connected by a guide pipe, and at least a purge gas is supplied into the guide pipe at the time of measurement. To do. [Selection] Figure 1

Description

  The present invention transmits millimeter waves or microwaves to the surface of coal input from the coal loading vehicle through the coal inlet of the coke oven, and receives the millimeter waves or microwaves reflected on the surface of the coal to thereby adjust the coal loading level. It relates to a measuring device.

  In the coke oven, a plurality of coal charging ports are provided on the upper surface, and coal is sequentially introduced from the charging port while moving a coal loading vehicle loaded with coal. At that time, it is required to measure the coal loading level of the coal put into the coke oven and charge as much as possible to increase the productivity.

  Therefore, the present applicant has previously proposed a measuring apparatus as shown in FIG. In the same figure, the charcoal vehicle 1 is a device for sending the coal C of the coal receiving hopper 10 to the coal charging chute 11 by the coal feeder 12, along the rail 101 fixed to the upper surface of the coke oven 100. For example, as shown in the drawing, it moves in the front-rear direction of the paper surface. Then, the coal car 1 stops when the coal charging chute 11 reaches directly above the coal charging port 102 of the coke oven 100 and drops coal C into the furnace. The lower end portion of the coal charging chute 11 is covered with a sleeve 13 whose bottom end is narrowed inward to match the diameter of the coal charging port 102 of the coke oven 100, and the coal C is supplied through the sleeve 13 to the coal charging port. 102 is surely dropped.

  A microwave transmission / reception means 20 is installed on the upper surface 1a of the coal-equipped vehicle 1. An antenna 22 is disposed below the floor 1b. The transmission / reception means 20 and the antenna 22 are connected by a waveguide 21. . The transmission / reception means 20 is connected to a controller 24 that performs operations such as transmission / reception of microwaves and calculation of a coal level. Thus, by arranging the transmitting / receiving means 20 and the controller 24 apart from the coke oven 100, malfunction due to heat can be prevented without using a heat insulating structure.

  In addition, a reflecting plate 23 is disposed facing the antenna 22, and a guide pipe 26 extending toward the reflecting plate 23 is attached. The reflecting surface 23 a of the reflecting plate 23 is inclined toward the coal inlet at an angle of 45 ° with respect to the axis A of the reflecting surface of the antenna 22, and the microwave transmitted from the antenna 22 is reflected by the reflecting plate 23. The light is reflected by the surface 23a, sent to the inside of the coke oven 100 through the coal loading port 102, and further reflected by the surface of the coal C ′ (M in the figure). The reflected microwave returns to the reflecting plate 23, is reflected by the reflecting surface 23 a, and is received by the antenna 22.

  Further, a reflecting plate moving means (not shown) is connected to the reflecting plate 23, and the reflecting plate 23 is moved immediately above the coal loading port 102 at the time of measurement, and away from just above the coal loading port 102 at the time of charging coal. Move to.

  Here, by using a rotating wave whose electric field rotates in one direction clockwise or counterclockwise as a microwave, it is possible to prevent the reflected wave (M ′) from the wall surface 102a of the coal charging port 102 from being received. Accurate measurement is possible.

  With such an apparatus configuration, the coal level can be accurately measured without the influence of heat.

JP 2012-188589 A

  However, in the measuring apparatus described in Patent Document 1, since the antenna 22, the guide pipe 26, and the reflection plate 23 are arranged below the sleeve 13, depending on the separation distance between the lower end of the sleeve 13 and the coke oven 100, These may not be installed. Moreover, the reflector 23 must be moved from directly above the coal filler 102 at the time of charcoalization and measurement, and a reflector moving means is required separately.

  In addition, since the reflector 23 and the antenna 22 are close to the coal opening 102, dust from the coke oven 100 adheres to the reflector 23a of the reflector 23 and the antenna surface of the antenna 22 during measurement, which adversely affects measurement accuracy. There is also a risk of affecting.

  Therefore, the present invention provides a coke oven coal level measuring apparatus that can be installed regardless of the separation distance between the sleeve of the coal charging chute and the coke oven, does not require a means for moving the reflector, and further, dust from the coke oven. The purpose is to prevent the effects of heat.

In order to achieve the above object, the present invention provides the following coke oven coal level measurement apparatus.
(1) A millimeter wave or a microwave is transmitted to the surface of the coal supplied from the coal hopper receiving hopper to the coal input chute by the coal feeder and supplied into the coke oven through the coal input chute. A device installed inside a charcoal vehicle to receive a reflected wave of millimeter waves or microwaves reflected by the
A coke oven characterized in that a microwave or millimeter wave transmission / reception means and an opening in a ceiling surface of a coal charging chute are connected by a guide pipe, and a purge gas is supplied into the guide pipe at least during measurement. Carbonation level measuring device.
(2) A dustproof / heatproof filter is attached by closing an opening in the ceiling surface of the coal charging chute, and the guide pipe is connected to the dustproof / heatproof filter,
The dustproof / heatproof filter is, in order from the coal charging chute, a breathable filter made of a heat-resistant material that transmits millimeter waves or microwaves, and a non-breathable heat insulation made of a heat-resistant material that transmits millimeter waves or microwaves. The coke oven according to (1) above, wherein the plate is spaced apart and surrounded by a frame, and a purge gas is supplied to a space between the filter and the heat insulating plate. Carbonation level measuring device.
(3) The guide pipe is an L-shaped tube and includes a first reflector at a 90 ° bent portion thereof.
Accommodating the antenna of the transmitting / receiving means at one end;
The above (1) or (2), characterized in that the other end is provided with a second reflecting plate facing the reflecting surface of the first reflecting plate and facing the heat insulating plate of the dustproof / heatproof filter. Coke oven charcoal level measuring device as described.
(4) The filter of the dustproof / heatproof filter is a planar woven filter made of a heat-resistant material that transmits millimeter waves or microwaves, and has a breathability by woven flat fibers, or the fibers are processed into a bag shape. The apparatus for measuring a coal level in a coke oven according to any one of the above (1) to (3), wherein the bag-like woven fabric filter is provided with air permeability.
(5) The apparatus for measuring a coal level in a coke oven according to any one of (1) to (4), wherein a rotating wave of millimeter wave or microwave is used.
(6) The microwave or millimeter wave is continuously transmitted during the coal charging, and the coal loading level is measured simultaneously with the coal loading operation, and any one of the above (1) to (5) is characterized. Equipment for measuring the level of coal in a coke oven.
(7) Using millimeter waves,
The dustproof / heatproof filter is attached to the opposite side of the coal feeder from the center axis of the coal charging chute,
The above (1) to (6), wherein the amount of coal supplied from the coal feeder is reduced in the second half of the coal loading operation, and the coal loading level is measured within the period from the second half of the coal loading operation to the end. The coke oven coal level measurement apparatus according to any one of the above.
(8) The coal loading level is measured during coal loading, and when the optimum level is reached, a signal for stopping the coal loading is output, according to any one of (1) to (7) above Coke oven coal level measurement device.

  In the coal loading level measuring apparatus of the present invention, the transmission / reception means and the opening of the ceiling surface of the coal charging chute are connected by a guide pipe, and the entire apparatus is accommodated in the charcoal vehicle, so that the sleeve of the coal charging chute and the coke oven are separated from each other. It can be installed regardless of the distance, and it is not necessary to move the reflector directly above the coke oven charging port during measurement or during coal loading. Is no longer necessary. Moreover, it is possible to measure the coal loading level during coal loading. In addition, since purge gas is supplied into the guide pipe, dust can be prevented from entering, and heat from the furnace can be shut off by providing a dustproof and heatproof filter on the ceiling surface of the coal loading chute of the coal loading car. It is possible to prevent dust from entering, and transmission / reception is improved.

It is sectional drawing which shows an example of the carbonization level measuring apparatus of this invention. It is sectional drawing which shows a dustproof / heatproof filter. It is sectional drawing which shows the other example (bag-shaped textile filter) of a dustproof / heatproof filter. It is sectional drawing which shows the other example of the charcoal level measuring apparatus of this invention. It is sectional drawing which shows the further another example of the carbonization level measuring apparatus of this invention. It is a schematic diagram for demonstrating the method of calculating | requiring a coal level from the beat wave by a sweep. It is sectional drawing which shows the charcoal level measuring apparatus of patent document 1.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  The coal level measuring device of the present invention is shown in FIG. 1, and the entire device is installed inside a general coal-equipped vehicle 1. As shown in FIG. 7, the coal-equipped vehicle 1 includes a coal receiving hopper 10 that stores coal C supplied from the outside, and a coal feeding device 12 that sends the coal C of the coal receiving hopper 10 to the coal charging chute 11. And. The coal feeder 12 is generally a screw feeder, a table feeder or the like. In addition, the lower end portion of the coal charging chute 11 may be covered with a sleeve 13 whose lower end is narrowed inward and matched to the diameter of the coal loading port 102 of the coke oven 100. And the charcoal vehicle 1 moves to the front-back direction of a paper surface, for example so that it may show along the rail 101 fixed to the upper surface of the coke oven 100, for example.

  An opening 11b is formed in the central portion of the ceiling surface 11a of the coal charging chute 11, and one end of a guide pipe 40 is attached to the opening 11b. Further, the antenna 22 of the transmission / reception means 20 is attached to the other end of the guide pipe 40. Note that the guide pipe 40 is a straight pipe extending right above the opening 11b in the example of the figure, but may be an L-shaped pipe having a reflecting plate installed at a bent portion (see FIG. 4).

  Further, a gas supply port 35 is provided in the vicinity of the antenna 22 on the side wall of the guide pipe 40, and a purge gas such as nitrogen gas or air is supplied. The protrusion (not shown) in the guide pipe of the gas supply port 35 is preferably formed to be inclined downward toward the inner wall of the guide pipe 40 and toward the opening 11 b of the coal charging chute 11. Thus, as shown in the figure, the purge gas flows spirally along the inner wall of the guide pipe 40 toward the opening 11b of the coal charging chute 11 and is discharged from the opening 11b, so that the dustproof effect Will increase.

  Although not shown, the transmission / reception means 20 controls transmission / reception of millimeter waves or microwaves, processes received signals, and the like by means of a controller (reference numeral 24 in FIG. 7). Moreover, the transmission / reception means 20 and the controller may be unitized.

  In the charcoal level device configured as described above, at the time of measurement, as indicated by an arrow in the figure, the millimeter wave or microwave from the transmission / reception means 20 is transmitted from the antenna 22 and propagates through the guide pipe 40. The process proceeds to the coal charging chute 11 and the sleeve 13, and proceeds to the inside of the coke oven 100 through the coal loading port 102. Then, the millimeter wave or the microwave reflected by the surface of the coal C ′ deposited in the furnace is received by the transmission / reception means 20 through a path reverse to the conventional one. Then, the accumulation level of coal C ′ is calculated based on the time difference between transmission and reception of millimeter waves or microwaves by the controller. Further, at least at the time of measurement, preferably by always supplying the purge gas, dust intrusion into the guide pipe 40 is prevented, so that satisfactory transmission / reception is performed.

  Moreover, since the transmission / reception means 20, the antenna 22, and the guide pipe 40 are accommodated inside the coal-equipped vehicle 1, the transmission / reception means 20, the antenna 22 and the guide pipe 40 can be installed regardless of the separation distance between the sleeve 13 of the coal charging chute 11 and the coke oven 100. It is not necessary to move the reflecting plate 23 (see FIG. 7) as in Document 1.

  Further, as shown in FIG. 2, the opening 11b may be closed and a dustproof / heatproof filter 30 may be attached. The dust-proof / heat-proof filter 30 is made of a heat-resistant material and transmits a millimeter wave or microwave, and a non-breathable heat insulating plate 31 that does not transmit gas, and an entire surface of the plate material that is made of a heat insulating material and transmits millimeter wave or microwave. A plurality of through-holes 32 a are formed on the filter plate 32, which is made air permeable, and is surrounded by a frame 33. The heat insulating plate 31 and the filter plate 32 can be made of ceramic, for example.

  Further, the frame 33 is provided with a gas supply port 35 for supplying a purge gas to the space S between the heat insulating plate 31 and the filter plate 32. In addition, while providing the partition wall 36 in the inner wall of the frame 33, you may form the protrusion opening 37 which inclines in the partition wall 36 at the filter board side. Thereby, the purge gas from the gas supply port 35 is efficiently supplied to the filter plate 32 and flows out to the opening 11b through the through hole 32a, thereby preventing dust from entering.

  The dustproof / heatproof filter 30 is airtightly attached to the opening 11b so that the filter plate 32 is on the coal charging chute side.

  By the way, since the filter plate 32 is a rigid body such as a ceramic plate, the filter plate 32 does not vibrate even when the purge gas is supplied into the frame and flows out of the through hole 32a. Therefore, it is difficult to remove dust adhering to a portion other than the through-hole on the surface on the coal charging chute (the lower surface of the hatched portion in the figure) even if the purge gas flows out from the through-hole 32a. If the amount of dust adhering too much affects the transmission and reception of millimeter waves or microwaves, it is necessary to remove the dust / heat protection filter 30 from the coal charging chute 11 and remove the adhering dust.

  Therefore, instead of the filter plate 32, a fabric (planar woven fabric filter) in which fibers made of a heat-resistant material that transmits millimeter waves or microwaves, for example, ceramic fibers, are woven in a planar shape to have air permeability is used as the frame body 33. It may be stretched. Since this planar fabric filter is soft and flexible, when the purge gas is supplied into the frame, or when the purge gas flows out through the gap between the fibers (corresponding to the through hole 32a). It can vibrate and shake off the attached dust. For example, “Tyranno fiber” manufactured by Ube Industries, Ltd. can be used as the ceramic fiber that transmits millimeter waves or microwaves. The Tyranno fiber is a ceramic fiber made of silicon, titanium, zirconium, carbon, and oxygen, and a fabric woven with the fiber becomes a flexible member having heat resistance and air permeability.

  Further, in order to vibrate more greatly and enhance the dust spilling effect, as shown in FIG. 3, a bag-like woven filter 32A in which the above woven fabric is formed into a bag shape is hung down to the coal injection shooter side by its own weight. It may be attached to the body 33. However, as illustrated, the lower end of the bag-like fabric filter 32A is located above the opening 12a of the coal-feeding device 12 so that the coal C from the coal-feeding device 12 does not hit the bag-like fabric filter 32A. To do. Note that the bag-like woven filter 32A is made of a fiber material that transmits millimeter waves and microwaves, and therefore does not affect the transmission and reception of millimeter waves and microwaves even if it is curved.

  Furthermore, the guide pipe 40 may be an L-shaped tube as shown in FIG. This L-shaped guide pipe 40A includes a first reflecting plate 41 at a 90 ° bent portion, the transmitting / receiving means 20 is connected to one end, and the second reflecting portion is connected to the other end. A plate 42 is provided. In addition, although it is preferable that the edge part of another line is attached to the dust-proof and heat-proof filter 30, as shown in the figure, you may attach directly to the opening 11b of the coal injection chute 11. Both the first reflecting plate 41 and the second reflecting plate 42 are 45 ° reflecting plates, and the reflecting surface of the first reflecting plate 41 faces the reflecting surfaces of the transmitting / receiving means 20 and the second reflecting plate 42 45. The second reflecting plate 42 is inclined 45 ° downward so as to face the reflecting surface of the first reflecting plate 41 and the coal injection chute 11.

  In the guide pipe 40 </ b> A, an antenna 22 connected to the transmission / reception means 20 is accommodated in a straight pipe portion 40 a that connects the transmission / reception means 20 and the first reflection plate 41. Moreover, the 1st reflecting plate 41 and the 2nd reflecting plate 42 are connected by the horizontal pipe | tube part 40b. Further, a hanging portion 40 c directed to the coal charging chute 11 is attached to the second reflecting plate 42, and the hanging portion 40 c is connected and fixed to the opening 11 b or the dustproof / heatproof filter 30.

  In the guide pipe 40A, the transmission / reception means 20 (and the controller) can be separated from the high-temperature coke oven 100. Note that the guide pipe 40 </ b> A can be lengthened by increasing the number of reflectors or the like in order to make the transmission / reception means 20 further away from the coke oven 100.

  Even in the guide pipe 40A, since the antenna 22 and the guide pipe 40 are accommodated inside the coal-equipped vehicle 1, the guide pipe 40A can be installed regardless of the separation distance between the sleeve 13 of the coal charging chute 11 and the coke oven 100. It is not necessary to move the reflecting plate 23 (see FIG. 7) as in FIG.

  At the time of measurement, as indicated by an arrow in the drawing, the millimeter wave or microwave from the transmission / reception means 20 is transmitted from the antenna 22 and propagates through the straight pipe portion 40a of the guide pipe 40A to be transmitted through the first reflector 41. Then, the light propagates through the horizontal pipe portion 40b and is reflected again by the second reflecting plate 42, then propagates through the drooping portion 40c, and passes through the opening 11b of the coal charging chute 11 or the dust / heat-proof filter 30. The process proceeds to the coal charging chute 11. Next, the millimeter wave or microwave reflected from the surface of the coal C ′ accumulated in the coke oven from the coal charging chute 11 to the furnace through the coal inlet 102 of the coke oven 100 is different from the past. The data is received by the transmission / reception means 20 via the reverse path. Then, the accumulation level of coal C ′ is calculated based on the time difference between transmission and reception of millimeter waves or microwaves by the controller.

  By the way, the millimeter wave or the microwave reflected by the coal C ′ in the furnace is further reflected by the wall surface 102a of the coal loading port 102 and the inner wall of the coal charging chute 11 and enters the second reflecting plate 42, and is transmitted and received. 20 (R ′ in FIGS. 1 and 4). When such an unnecessary wave is received, a peak appears at a position different from the original coal level. Therefore, it is preferable to use a rotating wave whose electric field rotates in one direction clockwise or counterclockwise. Since this rotation wave has a property that the rotation direction is reversed by reflection, the millimeter wave or microwave (R) reflected only on the surface of the coal C ′, the wall surface 102a of the coal loading port 102, the coal charging chute 11 and the like. Since the number of reflections differs from the millimeter wave or microwave (R ′) further reflected by the inner wall, the received millimeter wave or microwave can be distinguished by the rotation direction of the electric field.

  That is, for example, when a clockwise rotating wave is transmitted, the light is reflected twice by the first reflecting plate 41 and the second reflecting plate 42 and enters the coal C ′ as a rotating clockwise wave. And it reflects on the surface of coal C ', turns into a counterclockwise rotation wave, is reflected by the 2nd reflecting plate 42 and the 1st reflecting plate 41, and is received as a counterclockwise rotation wave. On the other hand, for example, when reflected by the inner wall of the coal charging chute 11, when the counterclockwise rotating wave reflected by the surface of the coal C 'is reflected by the inner wall of the coal charging chute 11, the clockwise rotating wave is reflected. Thus, the light is reflected by the second reflecting plate 42 and the first reflecting plate 41 and received as a clockwise rotating wave. Therefore, by receiving only the counterclockwise rotation wave, the rotation wave (R ′) reflected by the inner wall of the coal charging chute 11 can be eliminated, and an accurate coal loading level can be detected.

  In order to generate the rotation wave, a known method may be used. For example, a 90 ° phase plate made of a dielectric material may be mounted in a waveguide connecting the transmitting / receiving means 20 and the antenna 22.

  Further, it is preferable to use millimeter waves as the detection medium. As shown in the figure, the coal C charged into the furnace is normally deposited in a conical shape with the apex directly below the center of the coal charging port 102, and the surface of the coal C ′ immediately after coal charging is generally uneven. become. Since the microwave or millimeter wave is incident with the center of the coal inlet 102 as the axis, the microwave or millimeter wave is incident on the cone inclined surface of the coal C ′ and reflected. Since the microwave has a narrow scattering angle, when reflected on an inclined surface, the reflected wave mainly in the horizontal direction in the figure or obliquely upward or obliquely downward, is directly above where the guide pipe 40 and the transmission / reception means 20 are installed. Since the number of reflected waves in the direction is reduced, it is difficult to perform good transmission / reception. Therefore, the level of coal loading is measured after the surface of the coal C ′ is flattened using a leveler after coal loading.

  On the other hand, since the millimeter wave has a larger scattering angle than the microwave, even if it is reflected by the inclined surface, it reflects in various directions and the reflected wave in the upward direction is larger than when the microwave is used. Thus, reception can be performed satisfactorily. Therefore, it is possible to measure the coal loading level without performing leveling work immediately after coal loading. However, the measured coal level is a coal level near the apex of the cone and is different from the flattened level. Therefore, the case where the measured coal level is regarded as the apex of the cone, the volume of the cone is calculated, the amount of coal C ′ deposited in each cone shape is obtained, and the concave portion is filled and flattened. Estimate the level of coal loading. It is also possible to measure whether or not the estimated coal loading is correct by measuring the coal loading level after flattening the surface of the coal C ′ using a leveler after coal loading.

  Further, the millimeter wave can reduce the diameter of the antenna 22 and the diameter of the guide pipe 40 compared to the microwave, and accordingly, the dust / heat-proof filter 30 is also reduced in size, and the space S is also reduced in capacity. The dust acts more efficiently and the dustproof effect is further increased.

  Furthermore, the millimeter wave can have a smaller beam diameter than the microwave. As shown in FIG. 5 (shown here according to the configuration of FIG. 4), the dustproof / heatproof filter 30 is on the side opposite to the opening 12a of the coal feeder 12 from the central axis O of the coal charging chute 11 (in the drawing). Shift to the right) and propagate millimeter waves in the same way as above. Thereby, the millimeter wave travels to the coke oven 100 not through the central axis O of the coal charging chute 11 but through the space on the opposite side of the opening 12a of the coal feeder 12. During the coal loading operation, the coal C usually falls entirely inside the coal charging chute 11, but the opening 12 a is smaller than the central axis O of the coal charging chute 11 by reducing the amount of coal supplied from the coal feeding device 12. An area where coal C does not fall or the amount of fall is small is formed on the opposite side. Therefore, by using millimeter waves, the coal supply level from the coal feeder 12 is reduced to the second half or near the end of the coal work, and the coal level is measured without being affected by the reflection of the falling coal C. can do.

  As shown in FIG. 5, the configuration in which the dustproof / heatproof filter 30 is attached while being shifted from the central axis O of the coal charging chute 11 can be made by microwaves by widening the diameter of the coal charging chute 11.

  The coal loading level is normally performed after the completion of the coal loading operation. If the coal loading level can be measured simultaneously with the coal loading operation in this way, the coal loading level can be adjusted quickly.

  Also, as a method of measuring the coal loading level at the same time as the coal loading operation, sweeping is performed several times during coal loading, and for each sweep, a beat wave with a reflected wave from falling coal is generated, and the sweep is completed. The coal level can also be obtained from the spectrum obtained by adding all the beat waves. In this case, both millimeter waves and microwaves can be used as the detection medium.

  When the falling coal C is irradiated with millimeter waves or microwaves and a sweep is performed multiple times, a beat wave with a reflected wave is generated for each sweep, but the beat wave generated in each sweep is another sweep. The beat waves generated in step 1 have different phases. Therefore, when the beat waves generated for each sweep are added together, the beat waves of various phases are overlapped, and the amplitude hardly changes as a whole. On the other hand, since the falling coal C continues to accumulate immediately below the coal loading port 102, the reflected wave reflected at this position generates a beat wave having the same phase even if the number of sweeps changes. Therefore, when the beat waves at this position are added together, the amplitude increases by the number of sweeps. This is equivalent even after FET processing.

  That is, as shown in FIG. 6, the first beat wave of the sweep (FIG. 6A) and the nth beat wave of the sweep (FIG. 6B) have slightly different peak positions (phases), but the amplitude When all beat waves up to the end of the sweep are added up, the received intensity from the falling coal C is the first or nth sweep as shown in FIG. While it is almost the same level as the first time, the amplitude of the bead wave due to the coal that has been deposited immediately below the coal inlet 102 shows a large peak A. Therefore, By detecting it, the coal loading level can be detected simultaneously with the coal loading.

DESCRIPTION OF SYMBOLS 1 Charcoal receiving vehicle 10 Coal receiving hopper 11 Coal input chute 12 Coal feeding apparatus 20 Transmission / reception means 22 Antenna 30 Dustproof / heatproof filter 31 Heat insulating plate 32 Filter plate 32A Bag-like fabric filter 33 Frame 35 Gas supply port 40 Guide pipe 40A Guide pipe 41 First reflector 42 Second reflector 100 Coke oven 101 Rail 102 Coal inlet C, C ′ Coal

Claims (8)

It is sent from the coal receiving hopper to the coal input chute by the coal feeder, and the millimeter wave or microwave is transmitted to the surface of the coal supplied into the coke oven through the coal input chute and reflected on the surface of the coal. In order to receive the reflected millimeter wave or microwave and measure the coal level, the device is installed inside the coal car,
A coke oven characterized in that a microwave or millimeter wave transmission / reception means and an opening in a ceiling surface of a coal charging chute are connected by a guide pipe, and a purge gas is supplied into the guide pipe at least during measurement. Carbonation level measuring device. A dustproof / heatproof filter is attached by closing the opening of the ceiling surface of the coal charging chute, and the guide pipe is connected to the dustproof / heatproof filter,
The dustproof / heatproof filter is, in order from the coal charging chute, a breathable filter made of a heat-resistant material that transmits millimeter waves or microwaves, and a non-breathable heat insulation made of a heat-resistant material that transmits millimeter waves or microwaves. The coke oven apparatus according to claim 1, wherein the plate is spaced apart and surrounded by a frame, and a purge gas is supplied to a space between the filter and the heat insulating plate. Charcoal level measuring device. The guide pipe is an L-shaped tube, and includes a first reflector at a 90 ° bent portion thereof.
Accommodating the antenna of the transmitting / receiving means at one end;
The coke according to claim 1 or 2, further comprising a second reflecting plate facing the reflecting surface of the first reflecting plate at the other end and facing the heat insulating plate of the dustproof / heatproof filter. Equipment for measuring the coal level in the furnace.   The filter of the dustproof / heatproof filter is a planar woven filter in which a fiber made of a heat-resistant material that transmits millimeter waves or microwaves is woven in a flat shape to give air permeability, or a breathability in which the fiber is processed into a bag shape. The apparatus for measuring a coal level in a coke oven according to any one of claims 1 to 3, wherein the apparatus is a bag-like woven fabric filter.   The apparatus for measuring a coal level of a coke oven according to any one of claims 1 to 4, wherein a rotating wave of millimeter wave or microwave is used.   The coke oven coal charging according to any one of claims 1 to 5, wherein microwaves or millimeter waves are continuously transmitted during the coal charging, and the coal loading level is measured simultaneously with the coal loading operation. Level measuring device. The dustproof / heatproof filter is attached to the opposite side of the coal feeder from the center axis of the coal charging chute,
The amount of coal supply from the coal supply device is reduced in the latter half of the coal loading operation, and the coal loading level is measured within a period from the latter half to the end of the coal loading operation. The apparatus for measuring a coal level of a coke oven according to item 1.   The coal level of the coke oven according to any one of claims 1 to 7, wherein the coal level is measured during coal loading, and a signal for stopping the coal loading is output when the optimum level is reached. measuring device.

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