EP1473350A1 - Ofenwandbeobachtungsvorrichtung und ofenwandformbestimmungsvorrichtung - Google Patents

Ofenwandbeobachtungsvorrichtung und ofenwandformbestimmungsvorrichtung Download PDF

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Publication number
EP1473350A1
EP1473350A1 EP03700487A EP03700487A EP1473350A1 EP 1473350 A1 EP1473350 A1 EP 1473350A1 EP 03700487 A EP03700487 A EP 03700487A EP 03700487 A EP03700487 A EP 03700487A EP 1473350 A1 EP1473350 A1 EP 1473350A1
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EP
European Patent Office
Prior art keywords
oven
oven wall
insulated container
light
light beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03700487A
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English (en)
French (fr)
Other versions
EP1473350B1 (de
EP1473350A4 (de
Inventor
Masato C/O NIPPON STEEL CORPORATION SUGIURA
Hizuru C/O NIPPON STEEL CORPORATION EGAWA
Shuji C/O Nippon Steel Corporation Naito
Masahiko C/O Nippon Steel Corporation Yokomizo
Michitaka C/O Nippon Steel Corporation Sakaida
Manabu C/O NIPPON STEEL CORPORATION KUNINAGA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
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Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2002231370A external-priority patent/JP3996813B2/ja
Priority claimed from JP2002237948A external-priority patent/JP4133106B2/ja
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP1473350A1 publication Critical patent/EP1473350A1/de
Publication of EP1473350A4 publication Critical patent/EP1473350A4/de
Application granted granted Critical
Publication of EP1473350B1 publication Critical patent/EP1473350B1/de
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B29/00—Other details of coke ovens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/02—Observation or illuminating devices
    • F27D2021/026—Observation or illuminating devices using a video installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0021—Devices for monitoring linings for wear

Definitions

  • the present invention relates to an oven wall viewing apparatus for viewing a high temperature oven wall such as an oven wall of a coking chamber of a coke oven and an oven wall shape measurement apparatus for measuring the surface shape of a high temperature oven wall.
  • a high temperature oven section such as a coking chamber of a coke oven
  • the oven walls making up the oven section are made of refractories. It is necessary to maintain an accurate grasp over the state of deterioration of the refractories.
  • a coking chamber of a coke oven is continuously operated under harsh conditions over a long period of usually over 20 years.
  • the refractory brick making up the coking chamber gradually deteriorate due to thermal, chemical, and mechanical factors.
  • the relatively small damaged parts of the oven walls of a coking chamber are repaired by filling them by melt spraying a refractory, while missing parts of brick are fit with refractory brick and refractory is melt sprayed for the joint. Therefore, it is important to view the surface by the necessary resolution and discover and obtain a grasp of the positions of damage in a state where the inside of the coking chamber is red hot.
  • Japanese Unexamined Patent Publication (Kokai) No. 3-105195 discloses a method of inserting a camera conveyance boom mounting a camera (ordinary two-dimensional ITV camera) into a coke oven from the oven jamb of the oven coking chamber and capturing an image of the oven inside wall surfaces while moving the camera in the oven length direction.
  • a coking chamber is extremely narrow in width, so if the camera is oriented to directly face an inside wall of the coking chamber, a sufficient distance cannot be obtained between the camera and the inside wall, the capture range becomes narrower, and the necessary range of the image cannot be obtained, so the camera is mounted at a slant with respect to the wall surface and the wall surface is captured in the field of vision at a shallow angle.
  • the image is captured by a camera from a direction slanted with respect to the oven walls.
  • a video camera housed in a heat insulated container is oriented vertical to the wall surface to capture an image.
  • Japanese Unexamined Patent Publication (Kokai) No. 61-114085 discloses a method of housing a prism and television camera inside a water-cooled box and reflecting onto a television camera the situation inside the oven reflected at the prism through a viewing window of the water-cooled box.
  • a refractory mirror surface is arranged at a pusher ram head of a coke pusher and an image of the wall surface inside the coking chamber reflected at the mirror surface is captured by a telescopic television camera provided with a zoom lens.
  • the telescopic television camera is arranged outside of the coking chamber and an image reflected on the mirror surface inside the oven is captured through the oven jamb.
  • the camera is mounted at a slant with respect to the wall surface to capture an image of the wall surface inside the field of vision by a shallow angle, so the image at the side closer to the camera becomes narrower in the capture range, while the image of the side far from the camera conversely has a broad capture range, but only covers a small area and therefore the necessary resolution cannot be obtained. Further, with such a capture method, it is difficult to focus over the entire field of vision.
  • the obtained perspective image is processed to convert it to a front image as if captured directly facing the oven wall, but even with such image processing, the facts remain that a sufficient resolution cannot be obtained for the parts captured from a far distance and that it is difficult to focus the image over the entire field of vision. Further, with viewing from such a slanted direction, fine cracks in the vertical direction in the oven wall surface and gaps in the joint between the bricks are difficult to see.
  • the recorded data has to be taken out from the heat insulated container and played back, so the data cannot be played back until the heat insulated container taken out from the oven sufficiently cools. Therefore, the work efficiency is poor when viewing a plurality of coking chambers.
  • a heat insulated container merely blocks the heat by a heat insulating material, so the time which it can reside in an oven in a high temperature state like a coke oven is at most about 3 minutes. Even if inserting the pusher of a coke oven in the oven and moving it in the oven by one stroke, normally about 3 minutes of time is required. Therefore, with a time which the container can reside in the oven of at most 3 minutes, there is little margin of time. If time is required for pushing, the camera apparatus or other electronic equipment would probably be damaged.
  • a refractory mirror surface deforms along with the sharp rise in temperature when inserted from the ordinary temperature outside of the oven to the high temperature inside of the oven, so it is necessary to preheat the container by a preheater before insertion. Further, by exposure to the high temperature oven atmosphere, the surface of the mirror surface clouds and it is difficult to maintain the optical performance over a long period of time.
  • an oven width meter was used for the coking chamber of the coke oven.
  • the left and right oven walls face each other in parallel in a narrow oven section like with the oven walls of the coking chamber, if the oven wall refractories are damaged or the oven wall deforms due to the side pressure received at the time of pushing the coke, the distance between the two oven walls increases. Therefore, by measuring the distance between the two oven walls, it is possible to estimate the soundness of the refractories forming the oven walls.
  • Japanese Unexamined Patent Publication (Kokai) No. 62-293112 discloses to provide a ram of a coke pusher etc. with a pair or a plurality of pairs of noncontact type range finders oriented to the oven walls, simultaneously measure the left and right walls from the mounting position, and continuously measure the width of the coking chamber from the total distances. By moving the pusher horizontally, it is possible to continuously measure the width between the oven walls in the coking chamber.
  • a probe is prepared for insertion from a coal charging port or peephole at the top of the coke oven, a line of light of projected from a light projector arranged in the probe to the partition by a projection angle ⁇ , the partition is captured by a camera, and the displacement of the partition and the width of the damaged parts and amount of relief of the damaged parts are measured from the amount of displacement of the line of light in the image.
  • the probe is cooled by circulation of cooling water.
  • the image of the partition is bent at a right angle by a prism arranged inside the probe and captured by the camera.
  • the side surface of the probe is formed with a window provided with heat resistant glass for projection of light from the projector and capturing an image by the camera.
  • This method enables independent evaluation of the amount of damage of the oven walls, but since the probe is inserted from the coal charging port etc. at the top of the coke oven, it is only possible to measure the part below the single coal charging port by one measurement and difficult to evaluate the state of the oven wall over a broad range in the longitudinal direction of the coking chamber in a short time.
  • the present invention has as its first object the provision of an oven wall viewing apparatus for viewing the surface of facing oven walls of a coking chamber of a coke oven which is compact in size and light in weight, does not require coolant water piping etc., is able to be easily attached to and detached from a pusher or other moving apparatus, is able to view the necessary viewing range at a wall surface, and has sufficient durability.
  • the present invention has as its second object the provision of such an oven wall viewing apparatus which is able to combine the captured oven wall image information and capture position information while maintaining the advantages of being compact in size, light in weight, and simple in structure and is able to propose an oven wall repair plan quickly utilizing the capture results.
  • the present invention has as its third object the provision of such an oven wall viewing apparatus which is able to sufficiently secure residence time in the high temperature oven while maintaining the advantages of being compact in size, light in weight, and simple in structure.
  • the present invention has as its fourth object the provision of an oven wall shape measurement apparatus for measuring the surface shape of facing oven walls such as high temperature oven walls of a coking chamber of a coke oven which is able to evaluate the state of a broad two-dimensional range of an oven wall by an image and is able to quantitatively evaluate the state of damage of a specific location and further which is compact in size and light in weight, does not require coolant water piping etc., is able to be easily attached to and detached from a pusher or other moving apparatus, is able to view the necessary viewing range at a wall surface, and has sufficient durability.
  • the present invention has as its fifth object the provision of such an oven wall shape measurement apparatus which is able to combine the captured oven wall image information and capture position information while maintaining the advantages of being compact in size, light in weight, and simple in structure and is able to propose an oven wall repair plan quickly utilizing the capture results.
  • the present invention further has as its sixth object the provision of an oven wall shape measurement apparatus able to sufficiently secure a high temperature oven residence time while maintaining the advantage of the compact size, light weight, and simplicity of the above oven wall shape measurement apparatus.
  • the present invention was made to achieve the above objects.
  • the gist of the oven wall viewing apparatus of the present invention is as follows:
  • the oven wall viewing apparatus of the present invention covers an oven wall viewing apparatus used inside a coking chamber 41 of an oven having high temperature oven walls 42a and 42b facing each other across a narrow gap, for example, a coke oven.
  • a camera apparatus 8 it is possible to use a CCD camera, a camera controller for controlling the same, etc..
  • the direction of the field of vision of the camera apparatus 8 should be made parallel to the oven walls 42a and 42b as shown in FIG. 4 and FIG. 5.
  • the mirror surface 2 or 2a and 2b is arranged in the direction of the field of vision of the camera apparatus 8 and the angle of the mirror surface is adjusted so that the image of the oven wall surface is reflected at the mirror surface 2 or 2a and 2b when viewed from the position of the camera apparatus 8.
  • the distance between the camera apparatus 8 and the mirror surface 2 or 2a and 2b is made constant. If the distance between the camera apparatus 8 and the mirror surface 2 or 2a and 2b is increased, it is possible to increase the effective length of the mirror surface in a direction parallel to the oven wall and possible to enlarge the range of the field of vision 13 or 13a and 13b (length in long side) of the camera apparatus for viewing the mirror surface.
  • the effective mirror surface width in the direction vertical to the oven wall that is, the width direction
  • the range (short side length) of the field of vision 13 or 13a and 13b of the camera apparatus cannot be increased.
  • the long side length of the field of vision 13 or 13a and 13b of the camera apparatus at the oven wall surface is made about 500 to 600 mm, it is possible to view the surface by a spatial resolution of about 1 mm - sufficient for detection of damage - by a general CCD camera.
  • the short side length of the field of vision 13 or 13a and 13b of the camera apparatus at the oven wall surface becomes about 150 to 200 mm when viewing the oven wall from the vertical direction.
  • the longitudinal direction of the mirror surface should be made the height direction of the oven, that is, the direction orthogonal to the depth direction of the oven.
  • the depth direction of the oven is the direction of movement of the oven wall viewing apparatus 1 when viewing the oven wall 42a and/or 42b.
  • the longitudinal direction of the mirror surface a direction orthogonal to the depth direction of the oven (direction of movement), it is possible to obtain the maximum capture information of the oven wall surface.
  • electronic equipment such as the camera apparatus 8 is housed in a heat insulated container 3, and the mirror surface 2 or 2a and 2b is arranged at the outside of the heat insulated container 3.
  • the heat insulated container 3 is not supplied with cooling water from outside of the oven and does not have power lines or signal wires connected to it.
  • the oven wall viewing apparatus placed in the oven can be made light in weight and compact in size and can be easily mounted to and detached from a structure inserted into and moving in the oven, for example, a coke pusher 43 of a coke oven coking chamber 41 (see FIG. 3).
  • the heat insulated container 3 is covered on its surface by a heat insulating material 4. If the time is short, it can remain in the high temperature oven and operate the electronic equipment inside it normally. If inside the coking chamber 41 of the coke oven, since the container can reside inside the oven for 3 minutes, it is possible to secure the minimum amount of time for insertion of the coke pusher 43 mounting the oven wall viewing apparatus 1 into the oven, viewing of the entire length in the depth direction of the oven, and extraction to the outside.
  • heat insulating material 4 covering the heat insulated container 3 it is possible for example to use a ceramic fiber board, calcium silicate board, etc..
  • the mirror surface 2 or 2a and 2b is arranged at the outside of the heat insulated container 3, so it is possible to keep the viewing window 16 of the heat insulated container 3 for securing the field of vision of the viewing apparatus down to the minimum size.
  • the viewing window 15 can be made small, so the radiation heat entering from there can be kept down to the minimum and a rise in temperature inside the heat insulated container can be prevented.
  • the viewing window 16 is provided with quartz glass or other heat resistant glass.
  • the heat resistant glass preferably has the function of passing visible light from the outside and reflecting the radiation heat by a means such as metal-evaporation.
  • the viewing apparatus of the present invention as shown in FIG. 4, it is possible to use a single mirror surface 2 to view one oven wall 42a.
  • the first mirror surface 2a reflects the surface of the first wall surface 42a
  • the second mirror surface 2b reflects the surface of the second wall surface 42b
  • the two are simultaneously captured by a single camera apparatus 8.
  • the mirror surface of the viewing apparatus of the present invention is arranged at the outside of the heat insulated container 3, the mirror surface is directly exposed to the high temperature atmosphere inside the oven.
  • the mirror surface of the container 11 containing cooling water 6 inside is made the mirror surface (2a and 2b).
  • the time when the viewing apparatus of the present invention resides in the high temperature oven is short. If within this time, the cooling water 6 inside the container 11 rises in temperature and boils to cool the container 11 by boiling and maintains the temperature of the container 11 at the boiling point of the cooling water (100°C).
  • the optical performance of the mirror surfaces 2 and 2b formed at the container surface can be maintained over a long time and the flatness of the mirror surfaces 2 and 2b can similarly be maintained over a long time.
  • the viewing apparatus of the present invention does not require the supply of cooling water from the outside of the oven for cooling the mirror surfaces 2a and 2b. Further, there is no need for use of a preheater of the mirror surfaces. Therefore, it is possible to easily mount the apparatus on a coke pusher or other moving apparatus.
  • the container 11 containing cooling water 6 inside it may be made a long rectangular cross-section shape with two of its four outer surfaces made mirror surfaces (2a and 2b) and the remaining two surfaces made heat insulating by a heat insulating material 12 in accordance with need. It is simple to make the container 11 itself out of stainless steel and polish the surface to a mirror finish.
  • the image captured by the camera apparatus 8 in the heat insulated container has to be recorded in a data recorder and the finally recorded data used to prepare image information of the oven walls.
  • the data recorder 22 may be housed inside the heat insulated container as with the viewing apparatus of the present invention of the above (5) (see FIG. 5).
  • a wireless transmitter 18 inside the heat insulated container and arrange the wireless receiver 21 and data recorder 22 outside of the oven as with the viewing apparatus of the present invention of the above (4) (see FIG. 3 and FIG. 6).
  • the information captured by the camera apparatus 8 is transmitted from the wireless transmitter 18 to the wireless receiver 21 and recorded in the data recorder 22. If designing the data recorder 22 so as to record the information in a recording computer or other processor 30 and simultaneously display the captured image at an image display 31, it is possible to confirm the results of the viewing at the same time as inserting the oven wall viewing apparatus inside the oven for viewing.
  • the heat insulated container returned from the 1000°C oven is high in temperature at the outside, so the inside data cannot be taken out until after the elapse of a certain time.
  • the trouble of taking out the oven wall viewing apparatus from the oven, then waiting until the apparatus cools before taking out the image data is not required, so it is possible to quickly confirm the state of the oven walls.
  • the wall of the heat insulated container 3 facing the outside of the oven is provided with a communication window 17 as shown in FIG. 6.
  • a metal-evaporation coating is not used for the coating for preventing penetration of radiation heat from the outside.
  • a dielectric substance such as a silica coating is coated.
  • a digital wireless transmitter and receiver for transmitting a digital signal by electromagnetic waves for the wireless communication. Since an analog image signal is output from the camera apparatus 8, the signal is converted to a digital signal by an A/D converter 26, the digital signal is transmitted by a digital wireless transmitter 27, and that signal is received by a digital wireless receiver 28 outside of the oven.
  • the received digital signal can be converted to an analog signal by a D/A converter 29 and output to an image display 31 or can be input as a digital signal to a processor 30 etc..
  • the capture information is transmitted from the heat insulated container to an outside wireless receiver 21 and the data recorded in an outside data recorder 22.
  • the outside data recorder 22 is arranged outside of the oven, so it is possible to calculate and fetch the capture current position data 35 of the camera apparatus 8 from the current position data of the pusher 43 mounting the camera apparatus 8.
  • the wireless transmitter 18 and the wireless receiver 21 it is also possible to use a transceiver provided with the functions of both transmission and reception.
  • the heat insulated container 3 preferably has a jacket 5 filled with a liquid 7 having a heat absorbing ability and further a heat insulating material 4 covering the outside such as the viewing apparatus of the present invention of the above (7) (see FIG. 1).
  • the liquid selected may be one having a large heat capacity per mass and volume.
  • a liquid able to be most easily obtained industrially and optimal as a heat absorbing material it is preferable to use water.
  • the heat penetrating the inside first is used up to raise the temperature of the liquid 7, for example, water.
  • Water has a large heat capacity, so it is possible to delay the rise in temperature inside the heat insulated container. Further, when the temperature of the water reaches 100°C, a large amount of the heat of vaporization is robbed by the boiling, so the temperature inside the heat insulated container will never exceed 100°C.
  • the top of the heat insulated container 3 is provided with an opening or a safety valve is provided.
  • the viewing apparatus of the present invention is characterized in that pipes are not connected for supplying or discharging liquid during viewing of the oven walls in the oven.
  • the width of the coke oven is usually about 400 mm.
  • the viewing apparatus of the present invention has to be made dimensions enabling insertion into this space with some leeway.
  • the jacket holding the water has a width of the water at the left and right of about 40 mm in the oven width direction.
  • the heat insulating material 4 at the outer circumference of the heat insulated container 3 for example, it is possible to use a ceramic fiber board and make the thickness of the heat insulating material 4 about 30 mm.
  • the internal space holding the oven wall viewing apparatus becomes 380 mm length ⁇ 160 mm width ⁇ 300 mm height.
  • the temperature of the internal space housing the oven wall viewing apparatus becomes, along with the elapsed time after insertion, 25°C after 3 minutes, 40°C after 5 minutes, and 55°C after 7 minutes.
  • the usual upper limit of the temperature used of the different electronic equipment housed in the heat insulated container is about 50°C, so the container can reside in the high temperature oven for at least 5 minutes.
  • the car 40 of the coke pusher 43 continuously successively repeats the work of pushing out the coke of the coking chamber finished being carbonized while moving on rails at 5 to 10 minute intervals. During that work, the apparatus views the oven walls of a large number of coking chambers.
  • the liquid in the heat insulated container rises in temperature, so if the container were inserted into the next coking chamber for measurement as it were without any time interval, the temperature of the liquid 7 in the heat insulated container 3 would successively rise and the possible time of residence in the oven would become shorter.
  • the bottom of the heat insulated container 3 is provided with a discharge port 23 for discharging the inside liquid.
  • a discharge port 23 for discharging the inside liquid raised in temperature and inserting new liquid of a low temperature each time the oven walls finish being viewed, it is possible to prevent a rise in temperature of the liquid. If continuing to discharge the liquid from the discharge port 23 while supplying cooled liquid from the filling port 24 at the time of filling the new liquid, it is also possible to reduce the temperature of the heat insulated container itself. As a result, it is possible to secure a sufficient residence time in the oven for each measurement.
  • thermometer 36 for measuring the temperature of the heat insulated container or the temperature of the liquid in the jacket inside the heat insulated container and to transmit the measured temperature to outside of the oven by the wireless transmitter 18.
  • the viewing apparatus of the present invention may set viewing positions in the oven in advance and capture images of the oven wall at those positions as still images. Due to this, it is possible to obtain images of the states of oven wall positions where damage is predicted as occurring in advance.
  • the camera apparatus 8 is moved in the depth direction of the oven by for example as shown in FIG. 3 mounting the oven wall viewing apparatus 1 housing the camera apparatus 8 on the coke pusher 43 of the coking chamber 41 of the coke oven and inserting the coke pusher 43 into the oven or extracting it from the oven at a constant speed by operation of a ram driver 46.
  • the camera apparatus moves 10 mm from the capture of one still image to the capture of the next still image.
  • FIG. 10 shows an oven wall picture obtained by joining eight adjoining still images at the image joining positions 15 to prepare an image 14 of a broad region. This data processing can be performed at the data recorder 22.
  • a viewing apparatus of the present invention arranging a wireless transmitter 18 in the heat insulated container, transmitting the capture information from the heat insulated container to a wireless receiver 21 outside, recording this data in an outside data recorder 22, and simultaneously recording the oven position information of the camera apparatus (capture current position data 35 in the horizontal direction in the oven) in a data recorder 22, it is possible to capture images while moving the camera apparatus 8 in the depth direction of the oven and select still images based on oven position information.
  • the captured still images are successively transmitted to an outside data recorder at a pitch of 1/30 second.
  • the data recorder 22 outside of the oven selects the still images received at the time each time the camera apparatus reaches a 100 mm pitch still image taking position based on the oven position information.
  • a wireless receiver enabling communication with the inside of the heat insulated container and the outside of the oven, it is also possible to transmit oven position information from outside the furnace to the heat insulated container, select still images every constant interval in the heat insulated container, and wirelessly transmit only the selected still images outside of the oven.
  • a viewing apparatus of the present invention capturing images while moving the camera apparatus 8 in the depth direction of the oven to take still images and stitching together these still images to prepare an oven wall image extending over a broad range in the depth direction of the oven, it is also possible to capture images so that overlapping parts occur between adjoining still images.
  • the overlapping parts capture the same parts of the oven wall, so it is possible to accurately position and align two images by pattern matching based on the images of the oven walls.
  • the oven walls are high in temperature, they emit light. It is possible to view the oven walls by capturing this thermal radiation light by a camera apparatus.
  • the capture range is a range of about 500 to 600 mm. Therefore, in the height direction of the oven, the range which can be captured at one time is limited.
  • the parts of the oven wall refractories where damage is particularly severe are for example limited to the vicinity of the coal charging line in the oven height direction etc..
  • the viewing apparatus of the present invention at a position enabling the vicinity of the coal charging line to be viewed, even if the range of viewing in the oven height direction is limited, it is possible to obtain sufficiently useful data.
  • the viewing apparatus of the present invention at a position enabling the vicinity of the coal charging line to be viewed, even if the range of viewing in the oven height direction is limited, it is possible to obtain sufficiently useful data.
  • the oven wall viewing apparatuses in the height direction at the coke pusher it becomes possible to view the oven wall over a broad range in the oven height direction.
  • the viewing apparatus of the present invention is compact in shape, light in weight, and does not require the provision of cooling pipes etc., so is easily changed to any height of mounting to the pusher. Further, it is possible to make measurements while changing the mounting position for each predetermined height to obtain oven wall viewing data for the oven height as a whole.
  • a power supply 10 is provided inside the heat insulated container.
  • the camera apparatus 8, data recorder 22, and wireless transmitter 18 operate by power supplied from this power supply 10.
  • the power supply 10 it is possible to use a dry cell, rechargeable storage cell, etc..
  • a rechargeable power supply may be used. Further, as shown in FIG. 7, by providing a recharging cable connection plug 25 at the outside of the heat insulated container 25, it becomes possible to recharge without opening the heat insulated container and therefore improve the work efficiency.
  • the recharging cable connection plug 25 may be covered at its outside by a heat insulating cap 34 when inserted into the oven. Only the heat insulating cap 34 need be removed at the time of recharging and the recharging cable connected.
  • the oven wall viewing apparatus shown in FIG. 1 was used for the purpose of viewing the surface of the oven walls of the coking chamber of the coke oven.
  • the external dimensions of the oven wall viewing apparatus 1 are a height of 500 mm, width of 300 mm, and length of 500 mm and the total weight about 50 kg.
  • the heat insulated container 3 of the oven wall viewing apparatus one covered over its outer circumference with ceramic fiber board as a heat insulating material 4 was used.
  • the thickness of the heat insulating material was made 30 mm.
  • a jacket made of stainless steel was arranged at the inside of the heat insulating material. The jacket was filled with a total of 30 liters of water 7.
  • the thickness of the layer of water was 40 mm.
  • a CCD camera as the camera apparatus 8.
  • the image signal captured by the camera apparatus was transmitted outside of the oven by the wireless transmitter 18.
  • the heat insulated container and the heat insulating material were provided with a viewing window 16 and a communication window 17.
  • the viewing window was fit with metal-evaporated quartz glass.
  • a rechargeable storage cell was provided as a power supply 10 and used to supply power to the camera apparatus, wireless transmitter, and controller for controlling the same.
  • mirror surfaces 2a and 2b were arranged in front of the heat insulated container, as shown in FIG. 1, mirror surfaces 2a and 2b were arranged.
  • the longitudinal direction of the mirror surfaces was made the height direction of the oven.
  • the two mirror surfaces 2a and 2b were set to angles with the oven wall 42 of 45°.
  • the left and right oven walls 42a and 42b can be simultaneously captured in the field of vision of the camera apparatus 8.
  • the fields of vision 13a and 13b of the camera apparatus have lengths on the long sides of 600 mm and lengths of the short sides of 200 mm for each of the left and right oven walls.
  • the container 11 For the mirror surfaces, use was made of the surface of the stainless steel container 11 containing cooling water 6 inside polished to a mirror finish.
  • the container 11, as shown in FIG. 2, has a long rectangular cross-sectional shape with two of its four outer surfaces made mirror surfaces and the remaining two surfaces made heat insulating by a heat insulating material 12.
  • the oven wall viewing apparatus and mirror surfaces were attached to the pusher 43.
  • the total weight of the oven wall viewing apparatus is a comparatively light one of approximately 50 kg. Further, since there is no need for arranging cooling water pipes or signal cables, it is possible to easily attach the components to any positions in the height direction of the pusher ram 44.
  • these components are either attached to positions of the oven wall viewing apparatus 1 behind the pusher ram 44 using a support 45 or attached to positions of the oven wall viewing apparatus 1' on a ram beam 47.
  • wireless communication using the electromagnetic waves of a digital signal was adopted.
  • the output of the camera apparatus and the output of the thermometer 36 for measuring the temperature inside the measurement unit are converted to a digital signal by the A/D converter 26 and sent to the digital signal wireless transmitter 27.
  • the digital signal wireless transmitter 27 functions as a wireless transmitter 18 and sends a wireless signal 19 to a wireless receiver 21 outside of the oven.
  • the part through which the electromagnetic wave passes is provided with a communication window 17 equipped with quartz glass coated with silica.
  • This silica coating blocks the radiation heat from the oven and does not obstruct the propagation of the electromagnetic waves since it is not a metal coating.
  • a digital signal wireless receiver 28 is arranged as a wireless receiver 21, while a processor 30 and image display 31 are arranged as a data recorder 22.
  • the digital signal received by the digital signal wireless receiver 28 is transmitted to the D/A converter 29 and processor 30.
  • the data sent to the processor 30 is recorded in the computer.
  • the capture signal is processed to easily analyzable image information.
  • the analog signal output from the D/A converter 29 is sent to the image display 31.
  • the data recorder 22 is sent the capture current position data 35 found based on the current position data of the pusher ram 44, so this data is also sent to the processor 30 and image display 31.
  • the capture information captured at different times can be arranged based on the capture current position data 35 to produce a single still image extending over the entire length in the depth direction of the coking chamber and to identify locations of oven wall damage.
  • the transmitted still image is fetched into the processor 30. Since the length of the still image in the oven width direction (short side) is 200 mm, adjoining images have 50 mm overlapping parts.
  • FIG. 9(a) shows an image of the oven wall 42a reflected in the mirror surface 2a and an image of the oven wall 42b reflected in the mirror surface 2b in the overall field of vision 9 of the camera apparatus. In both images, the joint 49 of the bricks 48 is clearly discriminated.
  • FIG. 9(b) shows the image of a location of the oven wall where damage occurred.
  • a joint gap 50 is viewed other than the normal joint 49. Further, a vertical crack 51 was viewed in the oven wall.
  • a carbon deposit 52 of the oven wall can also be viewed.
  • FIG. 10 shows an oven wall picture obtained by combining eight adjoining still images at the image joining positions 15 to obtain an image 14 of a broad region.
  • identification of damaged locations is easy. Further, it is possible to obtain a grasp of the overall state of damage at a single glance. Therefore, this is useful in diagnosis and management of ovens.
  • the data recorder 22 was successively sent data, so there was no need to open the heat insulated container after measurement was completed and the work efficiency of the measurement could be greatly improved. Further, it was possible to catch oven wall damage during measurement in real time and accurately identify even locations of occurrence of that damage, so it was possible to propose repair plans of the coking chamber without delay.
  • the discharge port 23 at the bottom of the heat insulated container was opened and the raised temperature cooling water 7 discharged and, simultaneously, ordinary temperature water was filled from the top filling port 24. 15 liters of water was filled to lower the temperature of the heat insulated container 3, then the discharge port 23 at the bottom of the heat insulated container was closed and water filled in the heat insulated container.
  • the rechargeable storage cell used as the power supply 10 in the measurement unit has a capacity enabling continuous measurement of the oven width of 10 coking chambers. At the time of recharging, it is possible to recharge by connecting a recharging cable to the recharging cable connection plug 25 arranged at the outside of the heat insulated container, so the heat insulated container does not have to be opened for recharging and recharging was possible with a good work efficiency.
  • the oven wall shape measurement apparatus 61 of the present invention houses inside it light beam emitters 62a and 62b and a camera apparatus 8.
  • the oven wall shape measurement apparatus 61 is arranged close to the oven walls 42a and 42b.
  • the distance between the facing oven walls (42a and 42b) is narrow, so the apparatus is inserted at the center of the width of the coking chamber and arranged in proximity to the two oven walls.
  • the light beam emitters 62a and 62b emit light beams 63a and 63b to the oven walls 42a and 42b from a slanted direction. In FIG. 11, they emit the light beams at an angle ⁇ .
  • the parts of the oven wall surface at which the light beams are emitted reflect the light beams and emit light forming the beam spots 64a and 64b.
  • the camera apparatus 8 is arranged for the purpose of capturing the oven wall surface including the light beam reflected light from a direction vertical to the oven wall as much as possible.
  • the camera apparatus 8 it is possible to use a CCD camera, a camera controller for controlling the same, etc..
  • the direction of the field of vision of the camera apparatus 8 may be made parallel to the oven walls 42a and 42b as shown in FIG. 11 and FIG. 12.
  • the mirror surface is arranged in the direction of the field of vision of the camera apparatus 8.
  • the angle of the mirror surface is adjusted so that the image of the oven wall surface is reflected at the mirror surface when viewed from the position of the camera apparatus 8.
  • the distance between the camera apparatus and the mirror surface is made constant.
  • the longer the distance between the camera apparatus and the mirror surface the longer the effective mirror surface length in the direction parallel to the oven wall can be made and the broader the range of the field of vision 13 of the camera apparatus (length of long side) viewing the mirror surface can be made.
  • the length of the long side of the field of vision 13 of the camera apparatus at the oven wall surface is made 500 to 600 mm or so, viewing at a spatial resolution of about 1 mm sufficient for detection of damage is possible by a general CCD camera.
  • the length of the short side of the field of vision 13 of the camera apparatus at the oven wall surface becomes 150 to 200 mm when viewing the oven wall from a vertical direction.
  • the light beam 63 is emitted from the light beam emitter 62 to the oven wall surface 66b from a slanted direction. In FIG. 13, it is emitted at an angle ⁇ . Therefore, if the distance between the oven wall shape measurement apparatus 61 (light beam emitter 62) and the oven wall changes by exactly ⁇ x, the position of the point where the light beam 63 and the oven wall surface 66b intersect (light beam spot) changes from 64a to 64b and the position of the light beam reflected light changes by exactly ⁇ y.
  • the camera apparatus 8 captures an image of the oven wall surface 66 including the light beam reflected light, so a change in the distance between the oven wall shape measurement apparatus 61 and the oven wall 42, that is, deformation of the oven wall, can be deemed as a change of the position of the light beam reflected light in the captured image.
  • the light beam 63 emitted from the light beam emitter 62 can be made a spot-like light beam. Due to this, it is possible to evaluate the distance from the oven wall shape measurement apparatus 61 for one spot of the oven wall.
  • the light beam 63 emitted from the light beam emitter 62 may be emitted so that the reflected light becomes a line of light 65 when emitted to the oven wall.
  • a spot light source such as laser light as the light beam source
  • the oven wall reference surface means the reference surface when the oven wall surface 66 is not damaged and may be considered the oven wall surface with zero oven wall damage. Therefore, when making the light beam 63 a spot beam, the distance between the oven wall surface 66 at the light beam spot 64 reflected and the oven wall shape measurement apparatus 61 can be identified, but the absolute value of the oven wall damage is difficult to identify.
  • which parts of the oven wall surface 66 are sound and which parts are damaged can be generally determined by viewing the images captured by the camera apparatus 8.
  • the measurement apparatus of the present invention can simultaneously evaluate the state of a broad two-dimensional range of the oven wall by the images and quantitatively evaluate the state of damage at a specific location, so when generating a line of reflected light by emission of a light beam, sound parts and damaged parts of the oven wall can both be included in the straight line part.
  • the plane including the light beam 63 striking the oven wall and generating the line of light 65 will be referred to as the "light beam plane" here.
  • the position of the line of light 65 naturally matches with the line where the light beam plane and oven wall surface 66 intersect.
  • the center beam vertical plane when making the spot beam at the center of the width direction of the beam in the light beam 63 generating the line of light 65 the center beam 69, the plane including the center beam 69 vertical to the oven wall surface 66 will be referred to here as the "center beam vertical plane".
  • the light beam plane and the center beam vertical plane are orthogonal to each other, it is possible to detect the change in position of the line of light 65, that is, the drift 68, most efficiently.
  • the light beam plane and the center beam vertical plane are orthogonal to each other.
  • intersecting line 70 The line where the plane formed by the oven wall and the plane formed by the mirror surface intersect will be referred to here as the "intersecting line 70".
  • the intersecting line 70 becomes a line in the vertical direction.
  • the direction of separation is the direction parallel to the intersecting line of the wall surface and the mirror surface.
  • the light beam emitter 62 appears at the position of 62a at FIG. 15(a). If the direction of the line of light 65 ends up becoming parallel to the intersecting line 70 by such an arrangement, this corresponds to the case where the light beam plane and center beam vertical plane become parallel and evaluation of the damage of the oven wall becomes impossible.
  • the light beam emitter 62 it is preferable to use a laser light emitter (laser light source). This is because if a laser light source, it is possible to generate a fine spot of light and powerful light beam. To emit light to the oven wall and make a light beam giving a line of reflected light, it is possible to use a cylindrical lens etc. and enlarge the light spot in only one axial direction. The angle of spread, that is, the length of the line of reflected light at the oven wall surface, is determined by the focal distance of the cylindrical lens.
  • the oven wall surface 66 emits thermal radiation light in the red region.
  • the carbon deposits 52 burn and become high in temperature so feature a strong intensity of emission of red light. If the wavelength of the laser light is in the red region, the light is overcome by the thermal radiation light of the oven wall surface and detection of the light beam reflected light becomes difficult.
  • a red laser diode of a wavelength of 633 nm or 670 nm has conventionally been used. This is a wavelength region common with the thermal radiation light of the oven wall surface 66. In a high temperature region such as a carbon deposit 52, sometimes the light beam reflected light cannot be sufficiently detected.
  • the light beam emitter 62 is preferably made a laser light beam apparatus emitting light of a wavelength of not more than 550 nm and the camera apparatus 8 is made a color camera apparatus. If the wavelength is made not more than 550 nm, since it is different from the strong wavelength region of the thermal radiation light of the oven wall surface 66, the line of light is displayed emphasized at the captured color image.
  • the intensity of the thermal radiation light fluctuates depending on the temperature of the oven wall. If the temperature of the oven wall is high, the luminance of the oven wall due to the thermal radiation light is high, while if the temperature of the oven wall is low, the luminance of the oven wall becomes low. In particular, parts of carbon deposits become high in temperature due to the burning of the carbon, so the luminance of those parts becomes high.
  • the camera apparatus 8 it is possible to adjust the aperture of the optical system or adjust the exposure time in accordance with the luminance of the oven wall surface and thereby obtain an optimal image of the oven wall surface. Normally, it is possible to automatically obtain the optimal image by the exposure control function of the camera apparatus 8.
  • the intensity of the light beam 63 emitted by the light beam emitter 62 is constant, if the temperature of the oven wall is remarkably high, the thermal radiation light of the oven wall surface becomes higher in luminance than the light beam reflected light.
  • the exposure of the camera apparatus 8 is determined by the luminance of the oven wall surface 66. Therefore, the light beam reflected light becomes relatively dark. It is not possible to obtain a sufficient grasp of this or not possible to identify the position of the light beam reflected light.
  • the exposure of the camera apparatus is adjusted in accordance with the low luminance of the thermal radiation light of the oven wall surface, so the light beam reflected light becomes too strong, halation occurs, and the position of the light beam reflected light cannot be accurately identified.
  • the measurement apparatus of the present invention has a means for measuring the intensity of the thermal radiation light of the oven wall surface emitting the light beam, so it is possible to adjust the intensity of the light beam 63 emitted from the light beam emitter 62 in accordance with the intensity of the thermal radiation light measured and thereby solve this problem.
  • the intensity of the thermal radiation light of the oven wall surface When the intensity of the thermal radiation light of the oven wall surface is high, the intensity of the light beam 63 is strong and it becomes possible to obtain an accurate grasp of the position of the light beam reflected light. Further, when the intensity of the thermal radiation light of the oven wall surface is low, it is possible to weaken the intensity of the light beam 63 to prevent halation of the light beam reflected light.
  • Power is supplied to the light beam emitter 62 from the power supply 10 housed in the heat insulated container. To increase the period of use from one recharging of the power supply 10 to the next, it is preferable that the power consumption of the light beam emitter 62 be as small as possible.
  • the measurement apparatus of the present invention moves inside the oven, it is preferable to use a radiation thermometer as a temperature measuring means. Further, in measuring the intensity of the thermal radiation light, it is also possible to measure the average intensity of light of the total wavelength of the visible light, but it is also possible to take out and measure only the light intensity of the wavelength region centered on the wavelength of the light beam emitted.
  • the intensity of the thermal radiation light it is also possible to measure the average light intensity at the field of vision 13 of the camera apparatus captured at the camera apparatus 8. Further, it is also possible to measure the intensity of light limited to the region emitting the light beam in the field of vision 13 of the camera apparatus.
  • the measurement apparatus of the present invention it is possible to evaluate the relief of the oven wall surface quantitatively for a straight line part of the oven wall and possible to obtain a grasp of the two-dimensional state of the oven wall as a whole including the straight line part as an image. As a result, when data arising due to a bulge occurring at the oven wall surface is obtained, it is possible to clearly differentiate whether that bulge is due to deformation of the brick wall surface itself or due to carbon deposition based on the image.
  • the depth direction of the oven is the direction of movement of the oven wall shape measurement apparatus 61 while viewing the oven walls 42a and 42b. By viewing the surface while moving, it is possible to store the results of measurement of the oven wall shape in the depth direction of the oven.
  • the electronic equipment such as the light beam emitter 62 and camera apparatus 8 is housed in the heat insulated container 3 and the mirror surface 2 or 2a and 2b are arranged at the outside of the heat insulated container 3.
  • the heat insulated container 3 is not supplied with cooling water from outside of the furnace and does not have any power lines or signal wires connected to it.
  • the oven wall shape measurement apparatus 61 set in the oven light in weight and compact in size and possible to easily attach it to and detach it from a structure inserted and moving in the oven, for example, the coke pusher 43 of the coking chamber 41 of the coke oven (see FIG. 3).
  • the heat insulated container 3 is covered on its surface by the heat insulating material 4, so if a short time, it is possible to operate the electronic equipment inside the container normally while residing in the high temperature furnace.
  • the heat insulated container 3 can remain inside the coking chamber 41 of the coke oven for 3 minutes, so it is possible to secure the minimum amount of time for insertion of the coke pusher 43 mounted with the oven wall shape measurement apparatus 61 into the oven, viewing of the oven wall over the entire length in the depth direction of the oven, and extraction to the outside.
  • heat insulating material 4 covering the heat insulated container 3 it is possible for example to use a ceramic fiber board, calcium silicate board, etc..
  • the mirror surface 2 or 2a and 2b are arranged at the outside of the heat insulated container 3, so it is possible to keep the viewing window 16 of the heat insulated container 3 for securing the field of vision of the camera apparatus down to the minimum size.
  • the viewing window 16 is fit with quartz glass or other heat resistant glass.
  • the heat resistant glass preferably has the function of reflecting radiation heat from the outside by a means such as vapor deposition of a metal.
  • the light beam emitter 62 also emits a light beam 63 to only one viewed oven wall 42a.
  • the heat insulated container is preferably provided with a plurality of light beam emitters 62a and 62b, the light beams 63a and 63b are emitted to the facing oven wall surfaces 66a and 66b, and the two mirror surfaces 2a and 2b with the different angles reflect surfaces including the light beam reflected light of the facing oven walls 42a and 42b.
  • the first mirror surface 2a reflects the surface of the first wall surface 42a
  • the second mirror surface 2b reflects the surface of the second wall surface 42b
  • the two are simultaneously captured by a single camera apparatus 8.
  • the oven wall shape measurement apparatus 61 housing the single camera apparatus 8 and the two light beam emitters 62a and 62b and moving it once in the depth direction of the oven, it is possible to measure the shape of the oven wall surface at the left and right sides.
  • the measurement apparatus of the present invention for simultaneously measuring the oven wall surface shapes at the left and right by two light beam emitters and two mirror surfaces, it is possible to simultaneously measure the distance between the oven wall shape measurement apparatus and the measurement portions of the oven wall surface at the left and right sides. It is possible to calculate the distance between the measurement portions of the oven wall surface at the left and right sides from these measured values.
  • the total damage of the left and right sides can be calculated based on this measured value. At the very least, if the viewed portions at the left and right are sound portions where no local damage is viewed, since it may be considered that the damage will proceed evenly at the left and right, half of the total damage measured can be evaluated as the damage of the oven wall at each sound portion.
  • the mirror surface is arranged at the outside of the heat insulated container 3, so the mirror surface is directly exposed to the high temperature atmosphere inside the oven.
  • the surface of the container 11 containing cooling water 6 inside is made the mirror surfaces 2a and 2b.
  • the time when the measurement apparatus 61 of the present invention resides in the high temperature oven is short. If within this time, the cooling water 6 inside the container 11 rises in temperature and boils to cool the container 11 by boiling and maintains the temperature of the container 11 at the boiling point of the cooling water (100°C).
  • the optical performance of the mirror surfaces 2 and 2b formed at the container surface can be maintained over a long time and the flatness of the mirror surfaces 2 and 2b can similarly be maintained over a long time.
  • the measurement apparatus of the present invention it is not necessary to supply cooling water from outside of the furnace to cool the mirror surfaces 2a and 2b. Further, it is also not necessary to use a preheater for preheating the mirror surface. Therefore, it is possible to easily attach the apparatus to the coke pusher or other moving apparatus.
  • the container 11 containing cooling water 6 inside it may be made a long rectangular cross-section shape with two of its four outer surfaces made mirror surfaces and the remaining two surfaces made heat insulating by a heat insulating material 12 in accordance with need.
  • the image captured by the camera apparatus 8 in the heat insulated container has to be recorded in a data recorder 22 and the finally recorded data used to prepare image information of the oven walls.
  • the data recorder 22 may be housed inside the heat insulated container (see FIGS. 16 and 17).
  • the information captured by the camera apparatus 8 is transmitted from the wireless transmitter 18 to the wireless receiver 21 arranged outside of the oven and recorded in the data recorder 22. If designing the data recorder 22 so as to input the information in a recording computer or other processor 30 and simultaneously display the capture image at an image display 31, it is possible to confirm the viewing results at the same time as inserting the oven wall shape measurement apparatus inside the oven for viewing.
  • the heat insulated container returned from the 1000°C oven is high in temperature at the outside, so the inside data cannot be taken out until after the elapse of a certain time.
  • the trouble of taking out the oven wall shape measurement apparatus 61 from the oven, then waiting until the apparatus cools before taking out the image data is not required, so it is possible to quickly confirm the state of the oven walls. Further, it is possible to immediately use the oven wall shape measurement apparatus 61 taken out from the coking chamber for viewing of the next coking chamber.
  • wireless communication from the heat insulated container inside of the oven to outside of the oven it is possible to use wireless transmission using electromagnetic waves or wireless transmission using visible light, infrared light, or other light.
  • the wall of the heat insulated container facing the outside of the oven is provided with a transfer use window 17.
  • a metal-evaporation coating is not used for the coating for preventing penetration of radiation heat from the outside.
  • a dielectric substance such as a silica coating is coated.
  • a digital wireless transmitter and receiver (27 and 28) for transferring digital signals by electromagnetic waves for the wireless communication. Since analog image signals are output from the camera apparatus 8, the signal is converted to a digital signal by an A/D converter 26, the digital signal is transmitted by a digital wireless transmitter 27, and that signal is received by a digital wireless receiver 28 outside of the oven.
  • the received digital signal can be converted to an analog signal by a D/A converter 29 and output to an image display 31 or can be input as a digital signal to a processor 30 etc..
  • the capture information is transmitted from the heat insulated container to an outside wireless receiver 21 and the data recorded in the outside data recorder 22. At that time, it is possible to simultaneously record the oven position information of the camera apparatus (capture current position data 35 in horizontal direction in oven) together with the capture information in the data recorder 22.
  • the outside data recorder 22 is arranged outside of the oven, so it is possible to calculate and fetch the capture current position data 35 of the camera apparatus 8 from the current position data of the pusher 43 mounting the camera apparatus 8.
  • the wireless transmitter 18 and the wireless receiver 21 it is also possible to use a transceiver provided with the functions of both transmission and reception.
  • the heat insulated container 3 preferably has a jacket 5 filled with a liquid 7 having a heat absorbing ability and further a heat insulating material 4 covering the outside as shown in FIG. 11 and FIG. 19.
  • the liquid selected may be one having a large heat capacity per mass and volume.
  • a liquid able to be most easily obtained industrially and optimal as a heat absorbing material it is preferable to use water.
  • the heat penetrating the inside first is used up to raise the temperature of the liquid 7, for example, water.
  • Water has a large heat capacity, so it is possible to delay the rise in temperature inside the heat insulated container.
  • an opening or a safety valve is provided at the top of the heat insulated container 3.
  • the measurement apparatus of the present invention is characterized in that pipes are not connected for supplying or discharging liquid during viewing of the oven walls in the oven.
  • the width of the coking chamber 41 of the coke oven is usually about 400 mm.
  • the measurement apparatus of the present invention has to be made dimensions enabling insertion into this space with some leeway.
  • the jacket holding the water has a width of the water at the left and right of about 40 mm in the oven width direction.
  • the heat insulating material 4 at the outer circumference of the heat insulated container for example, it is possible to use a ceramic fiber board and make the thickness of the heat insulating material 4 about 30 mm.
  • the external dimensions of the oven wall viewing apparatus are made 500 mm length ⁇ 300 mm width ⁇ 500 mm height, the internal space holding the oven wall viewing apparatus becomes 380 mm length ⁇ 160 mm width ⁇ 300 mm height.
  • the temperature of the internal space housing the oven wall shape measurement apparatus becomes, along with the elapsed time after insertion, 25°C after 3 minutes, 40°C after 5 minutes, and 55°C after 7 minutes.
  • the usual upper limit of the temperature used of the different electronic equipment housed in the heat insulated container is about 50°C, so the container can reside in the high temperature oven for at least 5 minutes.
  • the car 40 of the pusher 43 continuously successively repeats the work of pushing out the coke of the coking chamber finished being carbonized while moving on rails at 5 to 10 minute intervals and simultaneously measures the shapes of the oven walls of a large number of coking chambers.
  • the liquid in the heat insulated container rises in temperature, so if the container were inserted into the next coking chamber for measurement as it were without any time interval, the temperature of the liquid 7 in the heat insulated container 3 would successively rise and the possible time of residence in the oven would become shorter.
  • the bottom of the heat insulated container 3 is provided with a discharge port 23 for discharging the inside liquid.
  • thermometer 36 for measuring the temperature of the heat insulated container or the temperature of the liquid in the jacket inside the heat insulated container and to transmit the measured temperature to outside of the oven by the wireless transmitter 18.
  • the measurement apparatus of the present invention may set viewing positions in the oven in advance and capture images of the oven wall at those positions as still images. Due to this, it is possible to obtain images of the states of oven wall positions where damage is predicted as occurring in advance.
  • the camera apparatus 8 is moved in the depth direction of the oven by for example as shown in FIG. 3 mounting the heat insulated container 3 housing the camera apparatus 8 etc. on the coke pusher 43 and inserting the coke pusher 43 into the oven or extracting it from the oven at a constant speed by operation of a ram driver 46. It is possible to move the camera apparatus 8 while continuously capturing images and view the results of capture as a moving image.
  • FIG. 22 shows an oven wall picture obtained by stitching eight adjoining still images at the image joining positions 73 to obtain an image 72 of a broad region.
  • this broad region image the light beam reflected light emitted by the light beam emitter 62 is reflected for each 100 mm pitch still image.
  • the light beam reflected light is the line of light 65 and the direction of the line of light 65 is parallel to the depth direction of the oven, the light is continuously reflected as a single long line of light overall. If the light beam reflected light is a line of light and the direction of the line of light is parallel to the height direction of the oven, the line of light facing the height direction is reflected at 100 mm pitches. This data processing can be performed at the data recorder 22.
  • the measurement apparatus of the present invention arranging a wireless transmitter 18 in the heat insulated container, transmitting the capture information from the heat insulated container to a wireless receiver 21 outside, recording this data in an outside data recorder 22, and simultaneously recording the oven position information of the camera apparatus (capture current position data 35 in the horizontal direction in the oven) in a data recorder 22, it is possible to capture images while moving the camera apparatus 8 in the depth direction of the oven and select still images based on oven position information.
  • the case of taking still images at a pitch of 100 mm in the width direction and stitching these still images to prepare an oven wall image of a broad range in the depth direction of the oven will be explained as an example.
  • the captured still images are successively transmitted to an outside data recorder at for example a 1/30 second pitch.
  • the data recorder 22 outside of the oven selects the still images received at the time each time the camera apparatus reaches the 100 mm pitch still image taking positions based on the oven position information.
  • a wireless receiver enabling communication with the inside of the heat insulated container and the outside of the oven, it is also possible to transmit oven position information from outside the furnace to the heat insulated container, select still images every constant interval in the heat insulated container, and wirelessly transmit only the selected still images outside of the furnace.
  • a measurement apparatus of the present invention capturing images while moving the camera apparatus 8 in the depth direction of the oven to take still images and stitching together these still images to prepare an oven wall image extending over a broad range in the depth direction of the oven, it is also possible to capture images so that overlapping parts occur between adjoining still images.
  • the overlapping parts capture the same parts of the oven wall, so it is possible to accurately position and align two images by pattern matching based on the images of the oven walls.
  • the oven walls are high in temperature, they emit red hot thermal radiation light. It is possible to view the oven walls by capturing this thermal radiation light by a camera apparatus. Further, when using an ordinary CCD camera as a camera apparatus, it is possible to capture images at a shutter speed of about 1/1000 second.
  • a green laser is used as the beam light source.
  • the color components of the color CCD camera that is, the R (red), G (green), and B (blue) components, are analyzed and introduced into the recorder 30.
  • the image analysis of the shape measurement is performed for the G component image corresponding to the laser wavelength.
  • the thermal radiation light of the oven wall is extremely weak and the light beam reflected light is viewed bright. Therefore, by digital processing, it is possible to extract the line segment of the light beam reflected light.
  • the capture range is a range of about 500 to 600 mm. Therefore, in the height direction of the oven, the range which can be captured at one time is limited.
  • the parts of the oven wall refractories where damage is particularly severe are for example limited to the vicinity of the coal charging line in the oven height direction etc..
  • the measurement apparatus of the present invention at a position enabling the vicinity of the coal charging line to be viewed, even if the range of viewing in the oven height direction is limited, it is possible to obtain sufficiently useful data.
  • the measurement apparatus of the present invention is compact in shape, light in weight, and does not require the provision of cooling pipes etc., so is easily changed to any height of attachment to the pusher. Further, it is possible to make measurements while changing the mounting position for each predetermined height to obtain oven wall shape measurement data for the oven height as a whole.
  • a power supply 10 is provided inside the heat insulated container.
  • the light beam emitter 62, camera apparatus 8, data recorder 22, and wireless transmitter 18 operate by power supplied from this power supply 10.
  • the power supply 10 it is possible to use a dry cell, rechargeable storage cell, etc..
  • a rechargeable power supply may be used. Further, as shown in FIG. 19, by providing a recharging cable connection plug 25 at the outside of the heat insulated container 3, it becomes possible to recharge without opening the heat insulated container and therefore improve the work efficiency.
  • the recharging cable connection plug 25 may be covered at its outside by a heat insulating cap 34 when inserted into the oven. Only the heat insulating cap 34 need be removed at the time of recharging and the recharging cable connected.
  • the oven wall shape measurement apparatus shown in FIG. 11 was used for the purpose of viewing the surface of the oven walls of the coking chamber of the coke oven.
  • the external dimensions of the oven wall shape measurement apparatus 61 are a height of 500 mm, width of 300 mm, and length of 500 mm and the total weight about 50 kg.
  • the heat insulated container 3 of the oven wall shape measurement apparatus one covered over its outer circumference with ceramic fiber board as a heat insulating material 4 was used.
  • the thickness of the heat insulating material was made 30 mm. At the inside of the heat insulating material, a jacket made of stainless steel was arranged. The jacket was filled with a total of 30 liters of water 7. At the portion of the heat insulating container 3 facing the oven wall, the thickness of the layer of water was 40 mm.
  • the heat insulated container and the heat insulating material were provided with a viewing window 16 and a communication window 17.
  • the viewing window was fit with quartz glass on which metal-evaporation coating was coated.
  • a rechargeable storage cell was provided as a power supply 10 and used to supply power to the camera apparatus, light beam emitters, wireless transmitter, and controller for controlling the same.
  • the light beam emitters blue laser diodes of a wavelength of 405 nm may be used.
  • a photometer 71 is arranged in the vicinity of the camera apparatus 8 inside the heat insulated container 3.
  • the photometer 71 uses a photo diode as a light sensor and measures the average amount of light (thermal radiation light intensity) in an oven wall surface of substantially the same field of vision as the camera apparatus 8.
  • the signal from the photometer is sent to a voltage controller 75 of the light beam emitters.
  • the voltage controller 74 adjusts the voltage of the power supplied to the lasers of the light beam emitters based on the signal of the photometer.
  • the relationship between the output of the photometer 71 and the voltage applied to the lasers is investigated in advanced by experiments to enable the lasers to be fired at the optimal intensities in accordance with the intensity of the thermal radiation light of the oven wall.
  • mirror surfaces 2a and 2b are arranged in front of the heat insulated container, as shown in FIG. 11, mirror surfaces 2a and 2b are arranged.
  • the direction of the intersecting line 70 of the oven wall surface 66 and the mirror surfaces can be made the height direction of the oven, the two mirror surfaces 2a and 2b can be set to angles with the oven walls 42a and 42b of 45°, and the left and right oven walls 42a and 42b can be simultaneously captured in the field of vision of the camera apparatus 8.
  • the fields of vision 13a and 13b of the camera apparatus have lengths on the long sides of 600 mm and lengths of the short sides of 200 mm for each of the left and right oven walls.
  • the mirror surfaces use was made of the surface of the stainless steel container 11 containing cooling water 6 inside polished to a mirror finish.
  • the container 11, as shown in FIG. 2(a), has a long rectangular cross-sectional shape with two of its four outer surfaces made mirror surfaces and the remaining two surfaces made heat insulating by a heat insulating material 12.
  • the light beam emitters 62a and 62b were arranged at positions of the same height as the camera apparatus 8 in the first embodiment as shown in FIG. 12(a) and emitted light beams 63 generating lines of light 65.
  • the direction of emission of the center beam 69 was the horizontal direction.
  • the beam was emitted in a slanted direction at an angle ⁇ with the oven wall surface 66 of 30°.
  • the line of light 65 was oriented in the height direction in the oven wall surface 66.
  • the length of the line of light 65 at the oven wall surface 66 was 200 mm.
  • the light beam emitter 62 was arranged above the camera apparatus 8 and emitted the light beam 63 to the oven wall surface 66 by reflecting it at the mirror surface.
  • the direction of emission of the center beam 69 was the horizontal direction.
  • the beam was emitted from a slanted direction at an angle ⁇ with the oven wall surface 66 of 60°.
  • the line of light 65 was oriented in the depth direction of the oven at the oven wall surface 66.
  • the length of the line of light 65 at the oven wall surface 66 was 200 mm.
  • the oven wall shape measurement apparatus and mirror surfaces were attached to the pusher 43.
  • the total weight of the oven wall shape measurement apparatus is a comparatively light one of approximately 50 kg. Further, since there is no need for arranging cooling water pipes or signal cables, it is possible to easily attach the components to any positions in the height direction of the pusher ram 44.
  • these components are either attached to positions of the oven wall shape measurement apparatus 61 behind the pusher ram 44 using a support 45 or attached to positions of the oven wall shape measurement apparatus 61' on a ram beam 47.
  • wireless communication using the electric waves of a digital signal was adopted.
  • the output of the camera apparatus and the output of the thermometer 36 for measuring the temperature inside the measurement unit are converted to a digital signal by the A/D converter 26 and sent to the digital signal wireless transmitter 27.
  • the digital signal wireless transmitter 27 functions as a wireless transmitter 18 and sends a wireless signal 19 to a wireless receiver 21 outside of the oven.
  • the part through which the electromagnetic wave passes is provided with a communication window 17 fit with quartz glass coated with silica.
  • This silica coating blocks the radiation heat from the oven and does not obstruct the propagation of the electromagnetic waves since it is not a metal coating.
  • a digital signal wireless receiver 28 is arranged as a wireless receiver 21, while a processor 30 and image display 31 are arranged as a data recorder 22.
  • the digital signal received by the digital signal wireless receiver 28 is transmitted to the D/A converter 29 and processor 30.
  • the data sent to the processor 30 is recorded in the computer.
  • the analog signal output from the D/A converter 29 is sent to the image display 31.
  • the capture signal measured in real time is processed to easily analyzable image information.
  • the data recorder 22 is also sent the capture current position data 35 found based on the current position data of the pusher ram 44, so this data is also sent to the processor 30 and image display 31.
  • the capture information captured at different times can be arranged based on the capture current position data 35 to produce a single still image extending over the entire length in the depth direction of the coking chamber and to identify locations of oven wall damage.
  • the transmitted still image is fetched into the processor 30. Since the length of the still image in the oven width direction (short side) is 200 mm, adjoining images have 50 mm overlapping parts. It is possible to use the overlapping parts for pattern matching and finely adjust the overlap of the images. In this way, it is possible to produce a single still image extending over the entire length in the depth direction of the coking chamber.
  • Each still image taken at a pitch of 150 mm in the depth direction of the oven shows a line of light 65 caused by light emitted by a light emitter.
  • the processor 30 can digitally process the image of the color component emphasized in light near the wavelength 532 nm to take out only information of the line of light 65 and incorporate the information of the line of light 65 into the original image again.
  • FIG. 20(a) and (b) The results of viewing of the oven wall in the first example are shown in FIG. 20(a) and (b).
  • the direction of the line of light is parallel to the intersecting line 70 of the oven wall surface and mirror surfaces, that is, the height direction of the furnace.
  • FIG. 20(a) shows an image of the oven wall 42a reflected in the mirror surface 2a and an image of the oven wall 42b reflected in the mirror surface 2b in the overall field of vision 9 of the camera apparatus.
  • FIG. 20(b) shows the image of a location of the oven wall where damage occurred.
  • a missing brick part 76 is viewed other than the normal joint 49.
  • a line of light 65 is reflected across the missing brick part 76. From the drift 68 of the line of light 65, it is possible to quantitatively evaluate the shape including the amount of damage of the missing brick part 76.
  • FIGS. 21(a), (b), and (c) The results of viewing of the oven wall in the second example are shown in FIGS. 21(a), (b), and (c).
  • the direction of the line of light perpendicularly intersects the intersecting line 70 of the oven wall surface and mirror surface, that is, is arranged in the depth direction of the oven.
  • FIG. 21(a) shows an image of the oven wall 42a reflected in the mirror surface 2a and an image of the oven wall 42b reflected in the mirror surface 2b in the overall field of vision 9 of the camera apparatus.
  • FIG. 21(b) shows an image of a location of the oven wall where damage occurs.
  • a joint gap 50 and vertical crack 51 in the oven wall are viewed.
  • the line of light 65 is reflected across the joint gap 50 and the vertical crack 51 in the oven wall. From the drifts 68c and 68d of the line of light 65, it is possible to quantitatively evaluate the shape including the amounts of damage of a joint gap 50 and vertical crack 51 in the oven wall.
  • a carbon deposit 52 is viewed.
  • the line of light 65 is reflected across the carbon deposit 52. From the drift 68e of the line of light 65, it is possible to quantitatively evaluate the amount of the carbon deposit 52.
  • FIG. 22 shows an oven wall picture obtained by combining eight adjoining still images at the image joining positions 73 to obtain an image 72 of a broad region.
  • the line of light 65 due to the emission of light beams is arranged parallel to the depth direction of the oven and is viewed as a substantially continuous straight line in the depth direction.
  • the data recorder 22 was successively sent data, so there was no need to open the heat insulated container after measurement was completed and the work efficiency of the measurement could be greatly improved. Further, it was possible to catch oven wall damage during measurement in real time and accurately identify even locations of occurrence of that damage, so it was possible to propose a repair plan of the coking chamber without delay.
  • the discharge port 23 at the bottom of the heat insulated container was opened and the raised temperature cooling water 7 discharged and, simultaneously, ordinary temperature water was filled from the top filling port 24.
  • the rechargeable storage cell used as the power supply 10 in the measurement unit has a capacity enabling continuous measurement of the oven width of 10 coking chambers. At the time of recharging, it is possible to recharge by connecting a recharging cable to the recharging cable connection plug 25 arranged at the outside of the heat insulated container, so the heat insulated container does not have to be opened for recharging and recharging was possible with a good work efficiency.
  • the oven wall viewing apparatus and the oven wall shape measurement apparatus of the present invention by housing a camera apparatus in the heat insulated container, arranging a mirror surface at the outside of the heat insulated container, and capturing an image of the oven wall surface reflected at the mirror surface by the camera apparatus, the apparatus is compact in size and light in weight, does not require coolant water piping etc., is able to be easily attached to and detached from a pusher or other moving apparatus, and is able to view the necessary viewing range at a wall surface.
  • the oven wall shape measurement apparatus of the present invention by emitting a light beam from a light beam emitter to the oven wall from a slanted direction, capturing an image of an oven wall surface reflected at a mirror surface and including light beam reflected light by a camera apparatus, and measuring the shape of the oven wall based on the position of the light beam reflected light, it is possible to evaluate the state of a broad two-dimensional range of the oven wall by the image and possible to quantitatively evaluate the state of damage of a specific location.
  • the two apparatuses of the present invention by using a wireless transmitter and receiver to record data outside of the oven, it is possible to combine the captured oven wall image information and capture position information while maintaining the advantages of being compact in size, light in weight, and simple in structure and possible to propose an oven wall repair plan quickly utilizing the capture results.
  • the two apparatuses of the present invention by stitching together the continuously taken still images, it is possible to obtain an oven wall image of a broad region in the depth direction of the oven.
  • identification of damaged portions is easy and the overall state of damage can be grasped by a single glance. This is useful in diagnosing and managing ovens.
  • the two apparatuses of the present invention by using a heat insulated container having a jacket filled with a liquid having a heat absorbing ability and further having a heat insulating material covering it at the outside, it is possible to secure a sufficient residence time in the high temperature oven while maintaining the advantages of being compact in size, light in weight, and simple in structure.

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  • Chemical & Material Sciences (AREA)
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  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Coke Industry (AREA)
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EP20030700487 2002-01-09 2003-01-08 Ofenwandbeobachtungsvorrichtung Expired - Lifetime EP1473350B1 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP2002002342 2002-01-09
JP2002002342 2002-01-09
JP2002231370 2002-08-08
JP2002231370A JP3996813B2 (ja) 2002-01-09 2002-08-08 炉壁観察装置
JP2002237948A JP4133106B2 (ja) 2002-08-19 2002-08-19 炉壁形状測定装置
JP2002237948 2002-08-19
PCT/JP2003/000072 WO2003066775A1 (en) 2002-01-09 2003-01-08 Furnace wall observation device and furnace wall shape measuring device

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EP1655570A1 (de) * 2004-11-08 2006-05-10 Matthias Franke Verfahren zur optisch-geometrischen Vermessung eines Innenraumes einer Thermoprozessanlage
WO2016135158A1 (de) * 2015-02-24 2016-09-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und system zum überwachen von prozessen in einer thermischen prozesskammer
EP3118554A1 (de) * 2015-07-17 2017-01-18 Refractory Intellectual Property GmbH & Co. KG Verfahren insbesondere zur ausbesserung einer feuerfestauskleidung eines metallurgischen gefässes im heissen zustand
EP2660558A4 (de) * 2010-12-27 2017-01-25 JFE Steel Corporation Vorrichtung zur formmessung einer ofenwand, system zur formmessung einer ofenwand und verfahren zur formmessung einer ofenwand
US10060725B2 (en) 2016-11-20 2018-08-28 Process Metrix Scanning laser range finder with surface temperature measurement using two-color pyrometry

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JP4873962B2 (ja) * 2006-02-27 2012-02-08 関西熱化学株式会社 炉内観察装置およびそれを備えた押出ラム
JP4262281B2 (ja) * 2007-02-22 2009-05-13 新日本製鐵株式会社 コークス炉の壁面評価装置、コークス炉の壁面評価方法、及びコンピュータプログラム
KR100825567B1 (ko) * 2007-07-13 2008-04-25 주식회사 포스코 코크스 오븐 내부의 형상을 화상 판독하는 장치 및 방법
KR101221014B1 (ko) * 2008-03-24 2013-01-10 신닛테츠스미킨 카부시키카이샤 퍼니스 내부 관찰 방법 및 장치
CN101576376B (zh) * 2008-12-24 2012-10-10 北京神网创新科技有限公司 激光检测料面形状的方法和系统
KR101184105B1 (ko) 2011-10-28 2012-09-18 인하대학교 산학협력단 후면볼록거울을 이용한 깊이감 측정 방법 및 장치
CN105210463A (zh) * 2013-03-26 2015-12-30 首要金属科技奥地利有限责任公司 用于容纳电子器件的电子器件保护壳体
US9638421B2 (en) * 2014-02-14 2017-05-02 Andritz Inc. Startup burner assembly for recovery boiler and method
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JP6599603B2 (ja) * 2014-04-18 2019-10-30 東芝ライフスタイル株式会社 自律走行体
CN103980913A (zh) * 2014-05-30 2014-08-13 武汉科技大学 一种焦炉高温检测及炉墙陶瓷焊补设备
TWI576567B (zh) * 2016-01-18 2017-04-01 中國鋼鐵股份有限公司 高爐用之微波料深尺
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EP1655570A1 (de) * 2004-11-08 2006-05-10 Matthias Franke Verfahren zur optisch-geometrischen Vermessung eines Innenraumes einer Thermoprozessanlage
EP2660558A4 (de) * 2010-12-27 2017-01-25 JFE Steel Corporation Vorrichtung zur formmessung einer ofenwand, system zur formmessung einer ofenwand und verfahren zur formmessung einer ofenwand
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WO2016135158A1 (de) * 2015-02-24 2016-09-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und system zum überwachen von prozessen in einer thermischen prozesskammer
EP3118554A1 (de) * 2015-07-17 2017-01-18 Refractory Intellectual Property GmbH & Co. KG Verfahren insbesondere zur ausbesserung einer feuerfestauskleidung eines metallurgischen gefässes im heissen zustand
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US10060725B2 (en) 2016-11-20 2018-08-28 Process Metrix Scanning laser range finder with surface temperature measurement using two-color pyrometry

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EP1473350B1 (de) 2015-04-29
BR0302581B1 (pt) 2013-07-23
WO2003066775A1 (en) 2003-08-14
AU2003201914A1 (en) 2003-09-02
BR0302581A (pt) 2004-02-25
AU2003201914B2 (en) 2004-10-28
KR100615106B1 (ko) 2006-08-25
CN1290969C (zh) 2006-12-20
EP1473350A4 (de) 2010-10-06
CN1496397A (zh) 2004-05-12
KR20030080249A (ko) 2003-10-11

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