JP2002047491A - Diagnostic method for oven wall of coke oven and diagnostic apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oven-wall diagnostic method whereby uneven sites of oven wall bricks of a combustion chamber or carbonization chamber of a coke oven are easily and accurately judged from the upper side of the oven without contacting the sites; and a compact oven-wall diagnostic apparatus therefor. SOLUTION: While continuously or intermittently varying the a radiation angle (α) by moving or rotating, around a reference point 12, a laser light radiation section 11 of a laser range finder 1 positioned above the oven, laser light is radiated from the laser light radiation section 11 to scan an oven wall 3 of an object chamber 2 to be measured. By the scanning, information directly or indirectly exhibiting the relation between the laser light radiation angle (α) and the distance (d) from the reference point 12 to the radiated site of the oven wall 3 is obtained. Basing upon the information, the unevenness of the oven wall 3 is found and the wall 3 is diagnosed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace wall diagnostic method for easily and accurately determining uneven portions of a furnace wall brick in a combustion chamber or a carbonization chamber of a coke oven from above the furnace without contact. The present invention relates to a diagnostic device.

[0002]

2. Description of the Related Art <Structure of coke oven> In a coke oven furnace which is now widely used, a large number of carbonization chambers and combustion chambers are provided alternately in parallel. The carbonization chamber and combustion chamber
It is built by combining firebricks. At the top of the combustion chamber for burning the fuel gas, there is provided a peephole through which the inside can be peeked. Coal charged into the carbonization chamber through the charging hole obtains heat from the combustion chambers located on both sides thereof through the furnace wall and is carbonized. After the carbonization, the coke is extruded from the carbonization chamber by the extruder and extinguished, resulting in product coke.

<Diagnosis of Furnace Wall> One of the indicators for judging the life of a coke oven is to use the damage state of a brick on a wall (furnace wall) of a combustion chamber or a carbonization chamber of the coke oven as a guide. Damage to the furnace wall includes brick joints, cracks, and chipped corners,
The smoothness of the carbonization chamber wall may be impaired due to the progress of defects or the like, and carbon generated during coal carbonization may adhere to the furnace wall and grow to form a thick layer. Due to such causes, the furnace wall becomes uneven. However, knowing the presence or absence of the unevenness and the location of the unevenness requires grasping the damage state of the furnace wall and measures for reducing the damage for extending the life (for example, repairing). And carbon burn-off).

<Method of Diagnosing Furnace Wall> As a method for contactlessly detecting the damage state of the furnace wall of a coke oven carbonization chamber, a method of measuring the furnace width of the carbonization chamber using an optical distance meter has been proposed. I have.

(A) Method of inserting a measuring device from a charging hole in a carbonization chamber JP-A-63-191005 discloses that light is emitted from a light source in a predetermined direction, and the emitted light is reflected by a reflecting surface. The reflected light is projected to a first measurement point on the wall of the carbonization chamber, the light reflected from the first measurement point is incident on the reflection surface, and a first distance from a predetermined point to the first measurement point is determined based on the incident light. While detecting
By changing the direction of the reflecting surface to reflect light from the light source,
The reflected light is projected to a second measurement point on the wall face opposite to the first measurement point, and the reflected light from the second measurement point is incident on a reflection surface whose position has been changed, and based on the incident light, a predetermined light is reflected from a predetermined point. 2
The second distance to the measurement point is detected, and the first distance and the second
A method and an apparatus for measuring the width of a coking chamber of a coke oven in which a width of a coking chamber from a first measurement point to a second measurement point is calculated based on the distance. In the embodiment, as shown in FIG. 1, a water-cooling lance supported by a bogie is lowered from a charging port (charging port) opening at the upper part of the carbonization chamber, and attached to the tip of the water-cooling lance. The measurement is performed by a measuring device.

(B) Method of inserting a measuring device from a kiln opening of a carbonization chamber JP-A-62-293112 discloses one or more pairs of non-contacting rams or ram beams of an extruder directed to respective side walls. There is shown a coke oven carbonization chamber width measuring apparatus provided with a type distance meter, a ram moving mechanism provided with a ram horizontal moving amount detector, and display means for identifying and displaying both measurement signals. Laser light, non-contact distance meter
Examples include a distance meter such as a microwave. In the embodiment, a laser reflection displacement meter for measuring a short distance is used.

[0007] Japanese Patent Application Laid-Open No. 3-269209 discloses that a pair of non-contact type distance sensors provided on an extrusion ram or ram beam of an extruder so as to be directed to both side walls of a carbonization chamber are used to reach each side wall. Detecting the amount of deviation of the distance sensor from the relative positional relationship between the ram beam and the carbonization chamber using position measuring means attached to the extruder; and Correcting the respective distance measurements to said sidewalls based on the amount of deflection, a method and apparatus for measuring a sidewall profile of a coke oven carbonization chamber. A non-contact type distance sensor is disclosed in Japanese Patent Application Laid-Open No. 62-293 in the description of the prior art.
No. 112 cites the use of a non-contact type distance sensor such as a laser beam or a microwave,
It seems that such a thing is used.

In Japanese Utility Model Application Laid-Open No. 63-145840 (Japanese Utility Model Application Publication No. 4-54208), a light source projects light from a light source onto a wall of a carbonization chamber and converts the reflected light from the wall. This is a device that measures the width of the carbonization chamber based on emitting light from the light source and calculates the distance based on the reflected light, and reflects the light emitted from the light source and projects it on both wall surfaces of the carbonization chamber And a reflecting mirror for reflecting the light reflected from these walls to the distance meter, an imaging reflecting surface provided on the same plane as the reflecting mirror, and an image reflected on the imaging reflecting surface. A carbonization chamber of a coke oven comprising: an imaging device; buffer means for elastically holding a main part of the device including the rangefinder, the reflecting mirror, the reflecting surface for imaging and the imaging device; and cooling means for the main part of the device. A width measuring device is shown. In the embodiment, an optical distance meter including a light source that emits laser light and a detector that receives reflected light from a measurement target is used as the distance meter.

(C) A method of inserting a measuring device from the kiln opening of the coking chamber (the optical range finder is arranged outside the coking chamber). Insert a horizontally movable liquid or gas-cooled sonde, project light from the light sources built into the two optical rangefinders provided in the measuring device, and provide the projected light in the tip of the sonde Through the mirrors, the light is projected from the projection holes on both sides of the tip to the two walls of the coking chamber, and the reflected light from both sides causes each of the two optical distance meters to reach each of the two sides of the coking chamber. A method for measuring the width of a coking chamber in a coke oven wherein a distance is detected and the width of the coking chamber is calculated based on a distance from each of the two optical rangefinders known in advance to the mirror. It is shown. As the optical distance meter, in the embodiment,
A rangefinder based on laser light with a built-in light source is used.

[0010]

The method of inserting a measuring device from the charging hole of the coking chamber as in the above (a) or the method of inserting the measuring device from the kiln opening of the coking chamber as in the above (b) is as follows. , Special equipment must be provided for the insertion of the measuring device and protection from heat, so that the entire measuring device becomes large or requires complicated control of movement,
When the number of fixed and attached measuring detectors is limited, measurement can be performed only in the vicinity of the detectors, so that there is a disadvantage that the measurement site is limited. The large size of the apparatus also hinders the operation of the coke oven because the movement is difficult to perform easily.

In this regard, as described in (c) above, the measuring device is inserted from the kiln opening of the carbonization chamber. However, the method of disposing the optical distance meter outside the carbonization chamber is as follows. Although not exposed, a liquid or gas-cooled sonde that can move horizontally into the coking chamber from the kiln opening of the coking chamber must be inserted, and a mirror must be provided at the tip of the sonde. As in the case of (b), the device is also large and the operability is poor.

In addition, in any of the above cases (a), (b) and (c), it is possible to obtain information on the width of the carbonization chamber but not on the furnace wall of the combustion chamber. There is a limit that you can't.

[0013] Under such a background, the present invention provides a method of diagnosing a furnace wall in which unevenness of a brick of a furnace wall of a combustion chamber or a carbonization chamber of a coke oven is easily and accurately determined in a non-contact manner from above the furnace. It is an object of the present invention to provide a compact furnace wall diagnostic device.

[0014]

One of the methods for diagnosing a coke oven wall according to the present invention is to diagnose a condition of a furnace wall (3) of a measurement object chamber (2) of a coke oven by measurement from above the furnace. A laser beam irradiator (11) of a laser range finder (1) positioned on a furnace is rotated or rotated around a reference point (12) to continuously or intermittently apply an irradiation angle α. The laser beam is emitted from the laser beam irradiator (11) while scanning the furnace wall (3) of the measurement target chamber (2), and the laser beam irradiation angle α and the reference point (12) from furnace wall (3)
Obtains information that directly or indirectly shows the relationship with the distance d to the irradiated part of the furnace, and diagnoses the furnace wall (3) by knowing the unevenness of the furnace wall (3) based on the information. It is characterized by the following.

Another method of diagnosing a furnace wall of a coke oven according to the present invention is a method of diagnosing the condition of a furnace wall (3) of a measuring object chamber (2) of a coke oven by measuring from above the furnace. The laser beam irradiator (11) of the laser rangefinder (1)
By rotating or rotating around the reference point (12), a predetermined irradiation angle α can be set, and while the laser rangefinder (1) is moved in the horizontal direction, the laser beam is emitted from the laser beam irradiation section (11). To scan the furnace wall (3) of the measurement target chamber (2), and by the scanning, the moving distance L of the laser range finder (1) and the irradiation area of the furnace wall (3) from the reference point (12) Distance d to
The method is characterized by obtaining information indicating directly or indirectly the relationship with the furnace wall, and performing diagnosis of the furnace wall (3) by knowing the unevenness of the furnace wall (3) based on the information. is there.

The apparatus for diagnosing a furnace wall of a coke oven according to the present invention includes a laser range finder (1) for diagnosing the condition of the furnace wall (3) of the chamber (2) to be measured of the coke oven by measuring from above the furnace. An apparatus provided with a laser beam irradiator (11) rotatably or rotatable around a reference point (12) on a movable gantry (13), and a furnace wall (3 ) The means for setting the laser beam irradiation angle α during scanning and the furnace wall from the reference point (12)
(3) means for measuring the distance d to the irradiation site (or a distance correlated to that d), and their irradiation angle α and distance d
(Or a distance correlated with d).

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

<Measurement target chamber (2)> The method of diagnosing a coke oven wall according to the present invention uses the furnace wall of the coke oven measurement target chamber (2).
This is a method for diagnosing the condition of (3) by measurement from the furnace.

The measuring chamber (2) of the coke oven includes a combustion chamber (2X). Since there is a peephole (4) at the upper part of the combustion chamber (2X), laser light can be emitted from the furnace through the peephole (4). The diameter of the viewing hole (4) is, for example, 120 mm.

The measuring chamber (2) of the coke oven includes a carbonization chamber (2Y). Since there are, for example, five charging holes (5) for charging coal in the upper part of the carbonization chamber (2Y), laser light can be emitted from the furnace through the charging holes (5). When the carbonization chamber (2Y) is in the coke kiln removal process from the coal charging process through the carbonization process, the laser beam is
Since scanning cannot be performed in (3), the carbonization chamber (2Y) in an empty kiln state is to be scanned in the present invention. Charging hole
The diameter of (5) is, for example, 440 mm.

<Laser Scanning Method / First> In the present invention, the laser beam irradiator (11) of the laser range finder (1) located on the furnace is rotated around the reference point (12). Alternatively, while changing the irradiation angle α continuously or intermittently by rotating, the laser beam is emitted from the laser beam irradiation section (11) to scan the furnace wall (3) of the measurement target chamber (2).

By the scanning, the laser beam irradiation angle α and the distance d from the reference point (12) to the irradiation site on the furnace wall (3) are calculated.
Obtains information indicating directly or indirectly the relationship with the furnace wall, and diagnoses the furnace wall (3) by knowing the unevenness of the furnace wall (3) based on the information.

More specifically, when a line extending vertically downward from the reference point (12) is used as a reference line, the irradiation angle α between the reference line and the laser beam trajectory includes the measurement object chamber (2)
Indicating the relationship between the distance d (or a distance correlated to the distance d, for example, the height from the furnace bottom, and so forth) using the angle component τ in the furnace length direction and the angle component θ in the furnace width direction. To get In order to facilitate understanding, some embodiments will be described below.

(A) By fixing τ = 0 and changing θ, the furnace wall (3) on one or both sides of the measurement target chamber (2) can be scanned in the vertical direction (described later). 2 and FIG. 6).

(B) If τ is set to a certain value other than 0 and θ is changed, the furnace wall (3) is scanned in a vertical direction at a position different from that when τ is fixed to 0. be able to. This method has an advantage in that it can scan the furnace wall (3) deviating from just below the peephole (4) in the combustion chamber (2X) or the charging hole (5) in the carbonization chamber (2Y).

(C) As in (a) above, first, τ = 0
, And scan so that θ changes,
After finding the irregularities on the furnace wall (3) (the vertical shape of the irregularities is known), if you fix some points in the θ range corresponding to the irregularities and change τ, The shape of the unevenness in the horizontal direction can be known.

(D) Further generalization, if both τ and θ are scanned in a plane so as to have an appropriate arbitrary combination,
A fixed area of the furnace wall (3) can be scanned, and a three-dimensional map of an uneven portion with respect to the furnace wall (3) can be created.

By performing the scanning as described in (a) to (d) above, a correlation between the angle α (τ, θ) and the distance d can be obtained. By comparing the assumed lines and profiles created assuming in advance, the furnace wall design at the beginning of the furnace construction, data measured in the past, etc.) and the state of the furnace wall (3) obtained by actual measurement,
The unevenness of the furnace wall (3) of the actual furnace can be grasped quantitatively, and it can be devised to grasp it visually.

Input, operation, storage, and
If you connect a device such as a personal computer that performs display and output,
Since the irregularities on the furnace wall (3) can be grasped by a very simple operation, the furnace wall can be easily diagnosed. In this case, data processing by a personal computer or the like is used to
As described above, by displaying or outputting a real three-dimensional image over a certain area of the furnace wall (3), it is also possible to visualize the portion and shape of the uneven portion.

<Laser Laser Scanning Method / Second> In another laser beam scanning method, a laser beam irradiating section (11) of a laser distance meter (1) located on a furnace is connected to a reference point. (12) By turning or rotating around, it is possible to set a predetermined irradiation angle α, and then, while moving the laser distance meter (1) in the horizontal direction, the laser light is emitted from the laser light irradiation unit (11). It emits light and scans the furnace wall (3) of the measurement target room (2).

Then, by the scanning, the laser distance meter (1)
And the distance d from the reference point (12) to the irradiation site of the furnace wall (3) is obtained directly or indirectly, and based on the information, the furnace wall (3) Diagnosis of the furnace wall (3) is performed by knowing the unevenness of the furnace wall.

This second method can also be employed in the same manner as the first method, except that the peephole (4) of the combustion chamber (2X) and the carbonization chamber (2Y) are used.
The size of the charging hole (5) is limited, so that the application area may be limited.

<Diagnosis Apparatus> As an apparatus for performing the above diagnosis, an apparatus provided with a laser distance meter (1) is preferably used. The principle of the laser range finder (1) is to measure the distance from the phase difference between the outgoing and reflected light, that is, to perform arithmetic processing based on the phase difference between the irradiation light and the returning wave. Since the laser range finder (1) is used by being placed on a coke oven, it is hardly affected by the heat of the chamber (2) to be measured and does not require any special cooling means. However, at the time of measurement, it is preferable to take some means such as scarfing air to shut off heat from inside the furnace.

In the present invention, as a laser range finder (1), a movable base (13) is provided with a laser beam irradiator (11) rotatable or rotatable around a reference point (12). Use something. The gantry (13) preferably includes wheels. In addition, as a means attached to the laser range finder (1), a means for setting the laser beam irradiation angle α when scanning the furnace wall (3) by laser light, and a means from the reference point (12) to the irradiation area on the furnace wall (3) Means for measuring the distance d (or a distance correlated to the distance d) of the light emitting element, and means for calculating the relationship between the irradiation angle α (τ, θ) and the distance d (or a distance correlated to the distance d). To be.

[0035]

The present invention will be further described with reference to the following examples. In Examples 1 and 3, the measurement target chamber (2) is a carbonized chamber (2Y).
And the combustion chamber (2X). Example 2 can be applied to the carbonization chamber (2Y),
It is difficult to apply to a combustion chamber (2X) with a small peephole (4).

Embodiment 1 (Example of Model) FIG. 1 is an explanatory view showing an example of a furnace wall diagnostic apparatus used in the method for diagnosing a furnace wall according to the present invention. FIG. 2 is a principle diagram showing an example of a method for performing a diagnosis of a furnace wall using the apparatus of FIG.

In FIG. 1, a laser beam irradiator (11), which is a main part of a laser range finder (1), is provided on a movable triangular frame base (13) with wheels. The laser beam irradiator (11) is attached to be rotatable or rotatable around a reference point (12) corresponding to a vertex of a triangular frame of the gantry (13). A personal computer (14) is also installed for controlling the laser rangefinder (1) and collecting measurement data.

The rotation or rotation of the laser beam irradiation unit (11)
When a line extending downward from the reference point (12) in the vertical direction is set as a reference line, an irradiation angle formed between the reference line and the laser beam locus is set to α by a driving unit (not shown). The irradiation angle α is divided into an angle component τ in the furnace length direction of the measurement target chamber (2) and an angle component θ in the furnace width direction.
In the first embodiment, as shown in FIG. 2, τ is fixed to 0, and θ can be changed. Figure 2 shows the furnace wall
The case where (3) has irregularities is also shown. d is the length of the laser beam trajectory.

FIG. 3 shows a furnace wall (3) having no irregularities in FIG.
Assuming that the laser beam irradiation unit (11)
FIG. 4 is a graph showing a model of the relationship between θ and d when rotated to an angle of °. The curve in this graph is a contrast line showing the furnace wall (3) without irregularities. In FIG. 3, the reference point (12) in FIG. 2 is located at a position higher than the furnace by Hb = 225 mm, and the reference line is in the center vertical direction between the furnace walls (3) and (3). The distance W between the line and each furnace wall (3), (3) is 225 mm, and the height H from the reference point (12) to the furnace bottom is H
₁ + H ₂ + H ₃ is shown a case where 6000 mm.

FIG. 4 shows a furnace wall (3) having irregularities in FIG.
FIG. 4 is a graph showing the relationship between θ and d as a model in a similar manner to FIG. As shown in FIG. 2, when the furnace wall (3) has a convex portion, the curve shifts downward when the laser beam approaches the convex portion. In addition, as shown in FIG.
When there is a concave portion, the curve shifts upward when the laser beam approaches the concave portion. Therefore, when compared with the reference line in FIG. 3, the position of the uneven portion is determined, and the approximate size and shape of the uneven portion are also determined.

Embodiment 2 (Model Example) FIG. 5 is a principle diagram showing another example of a method for performing a diagnosis of a furnace wall using the apparatus shown in FIG.

In this embodiment, as shown in FIG.
This shows a case where the reference point (12) is moved in the horizontal direction while b is kept constant. Assuming a furnace wall (3) with no irregularities assuming a moving distance of L and determining the relationship between L and d in advance, when the same operation is performed on the actual measurement target chamber (2), In addition, it is possible to determine whether the furnace wall (3) has irregularities and which part of the furnace wall (3) has irregularities.

Embodiment 3 (Model Example) FIG. 6 is a principle diagram showing still another example of a method of performing a diagnosis of a furnace wall using the apparatus of FIG.

FIG. 7 is a sectional view of FIG.
6 is a graph schematically showing the relationship between θ and d when 1) is rotated.

The thick line in FIG. 7 shows the relationship between θ and d when the laser beam is scanned on the assumption that the furnace wall (3) has no irregularities, and this is the reference line. The thin line in FIG.
This shows the relationship between θ and d when scanning with laser light is performed assuming a furnace wall (3) having irregularities. The thick dotted line in FIG. 7 shows the relationship between the height from the furnace bottom and θ when laser beam scanning is performed assuming a furnace wall (3) having no irregularities.

According to FIG. 7, when θ is changed from a high angle to a low angle, the thin line deviates downward from the thick line around θ of 34 ° and 22 °. Based on θ at this time, look at the thick dotted line indicating the height (irradiation position) of the laser measurement point from the furnace bottom and read the scale on the right side of the figure, and the height from the furnace bottom is 1550 mm and 1050 mm, respectively. It can be seen that there is a convex portion at the position. This position corresponds to the two convex portions in FIG.

Embodiment 4 (Example of Actual Furnace) FIG. 8 shows the relationship between the measurement order when laser light is scanned from the observation hole (4) of the combustion chamber (2X) of the coke oven and d when the measurement is actually made. FIG.

The horizontal axis indicates the order of each measurement point when the laser beam is applied from the furnace bottom toward the vertical furnace wall (3) and θ is changed from a low angle to a high angle at a constant angle. It is. The vertical axis d is the length of the laser beam trajectory.

In FIG. 8, the measurement order from 1 to 7 is the stage where the laser beam scans the bottom of the combustion chamber (2X). In the measurement orders 8 to 11, d is longer than θ because there are steps, gas holes, and air holes at the bottom of the combustion chamber (2X). After the measurement order 11, the laser beam scans the furnace wall (3). If the irradiation angle is changed at a constant angle on a vertical wall surface having no irregularities, the change of d with respect to θ becomes a smooth curve as in the example of FIG. The rapid change in
This indicates that the tips and corners of the projections hit the portion corresponding to the measurement order 12 of the furnace wall (3). In addition, measurement order 17 ~
In 20, the laser beam is applied to a portion outside the measurement target (combustion chamber).
It scans from the top of (2X) to the area between the peephole (4), that is, the auxiliary fluid damper and the small diameter hole.

Combustion chamber (2X) using the above measurement order and laser beam
Is summarized as follows. Measurement order 1 to 7: Bottom Measurement order 8 to 11: Bottom gas hole or air hole Measurement order 12 to 16: Laser light is scanning the furnace wall (3) from the bottom side. The change is large) Measurement order 17-20: Part outside the measurement target

In the case of the combustion chamber (2X), since the observation hole (4) is very small, θ cannot be made too large. In this case, if the measurement accuracy is not considered high, it can be considered that the length d of the laser beam trajectory is almost the same as the distance from the reference point (12) to the projection of the furnace wall (3). Therefore, it can be determined from FIG. 8 that there is one convex portion at a position approximately 6.5 m below the reference point (12). Also, by subtracting the measured value d from the distance from the furnace bottom to the reference point (12), the height of the protrusion from the furnace bottom can be known.

Embodiment 5 (Example of creating a map) Laser light is emitted from a laser range finder (1) installed on a coke oven so as to look into the inside from a charging hole (5) of a carbonization chamber (2Y). One furnace wall (3) of the carbonization chamber (2Y) was scanned. At this time, as shown in FIG. 9, τ was set variously in a range where laser light could be emitted from the charging hole (5), and the furnace wall (3) was scanned vertically by changing θ with respect to τ. . The scanning range is an arbitrary range of the furnace wall (3) from which laser light can be irradiated from above the furnace through the charging hole (5), and an arbitrary area such as a rectangle or a circle can be selected.

By processing the obtained data by a personal computer, τ and θ were converted into a height in the furnace length direction and a length in the furnace width direction, and were graphed, and the three-dimensional map of FIG. 10 was output. From FIG. 10, it is possible to intuitively and visually grasp the position and the rough shape of the uneven portion existing on the furnace wall (3).

[0054]

According to the present invention, a compact furnace wall diagnostic apparatus can easily and accurately determine uneven portions of a furnace wall brick in a combustion chamber or a carbonization chamber of a coke oven from the furnace without contact. And diagnosis of the furnace wall can be achieved. Therefore, monitoring, repair, and other necessary measures can be taken.

Further, since the apparatus provided with the laser distance meter (1) is lightweight and compact and can be easily moved, the scanning for the diagnosis of the furnace wall can be performed without hindering the operation of the coke oven. , Measurement is possible. Moreover, since the device is handled in a furnace, no special cooling device is required for the device.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a furnace wall diagnostic device used for a method of diagnosing a furnace wall according to the present invention.

FIG. 2 is a principle view showing an example of a method for performing a diagnosis of a furnace wall using the apparatus of FIG.

FIG. 3 shows the relationship between θ and d when the laser beam irradiating section (11) is rotated from near 0 ° to 45 °, assuming a furnace wall (3) without irregularities in FIG. Is a graph showing in a model.

FIG. 4 is a graph schematically showing a relationship between θ and d when a furnace wall (3) having irregularities in FIG. 2 is assumed.

FIG. 5 is a principle view showing another example of a method for performing a diagnosis of a furnace wall using the apparatus of FIG. 1;

FIG. 6 is a principle diagram showing still another example of a method of performing a diagnosis of a furnace wall using the apparatus of FIG.

FIG. 7 is a graph schematically showing a relationship between θ and d when the laser beam irradiation unit (11) is rotated in FIG.

FIG. 8 is a graph showing a relationship between a measurement order when laser light is scanned from a peephole (4) of a combustion chamber (2X) of a coke oven and d when actually measured.

FIG. 9 is an explanatory diagram showing an example of scanning the furnace wall (3) while changing θ and τ from the charging hole (5) of the carbonization chamber (2Y).

FIG. 10 is a three-dimensional map diagram obtained by the method of FIG. 9;

[Explanation of symbols]

(1)… Laser distance meter, (11)… Laser irradiation part, (12)… Reference point, (13)… Stand, (14)… PC, (2)… Measurement target room, (2X)… Combustion chamber , (2Y) ... carbonization chamber, (3) ... furnace wall, (4) ...
Peephole, (5) ... insertion hole

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4H012 EA00 4K051 AA08 BH01 4K056 AA16 CA12 FA19 FA24

Claims (7)

[Claims] A method for diagnosing the condition of a furnace wall (3) of a measurement object chamber (2) of a coke oven by measuring from above the furnace, wherein a laser of a laser distance meter (1) located on the furnace is provided. Light irradiation part (1
The laser beam is emitted from the laser beam irradiation unit (11) while the irradiation angle α is continuously or intermittently changed by rotating or rotating the 1) around the reference point (12), and the measurement target chamber is By scanning the furnace wall (3) in (2), the scanning directly determines the relationship between the laser beam irradiation angle α and the distance d from the reference point (12) to the irradiation site on the furnace wall (3). Or obtain indirectly shown information, and based on that information
A method for diagnosing a furnace wall of a coke oven, characterized in that the furnace wall (3) is diagnosed by knowing the unevenness condition of (3). When a line extending vertically downward from a reference point (12) is used as a reference line, the irradiation angle α between the reference line and the laser beam trajectory in the furnace length direction of the measurement target chamber (2) is included. Angle component τ
2. The method for diagnosing a coke oven wall according to claim 1, wherein information indicating a relationship with the distance d is obtained directly or indirectly using the angle component θ in the furnace width direction. 3. The method according to claim 1, wherein the control information is compared with the state of the furnace wall obtained by actual measurement to determine the unevenness of the furnace wall of the actual furnace. 3. The method for diagnosing a coke oven wall according to claim 1 or 2. 4. The measuring chamber (2) of the coke oven is a combustion chamber (2X).
A laser beam is emitted from a laser range finder (1) positioned on the furnace so as to look into the inside of the combustion chamber (2X) through the sight hole (4) of the combustion chamber (2X). 3) The method for diagnosing a coke oven wall according to any one of claims 1 to 3, wherein is scanned. 5. A measuring chamber (2) of a coke oven is a coking chamber (2Y) in an empty kiln state, and the coking chamber (2Y) is placed on the furnace so as to look inside from a charging hole (5) of the coking chamber (2Y). The coke oven according to any one of claims 1 to 3, wherein a laser beam is emitted from the installed laser distance meter (1) to scan a furnace wall (3) of the carbonization chamber (2Y). Furnace wall diagnosis method. 6. A method for diagnosing the condition of a furnace wall (3) of a measurement object chamber (2) of a coke oven by measuring from above the furnace, wherein a laser of a laser distance meter (1) located on the furnace is provided. Light irradiation part (1
1) can be set to a predetermined irradiation angle α by rotating or rotating around the reference point (12), and the laser distance meter
While moving (1) in the horizontal direction,
A laser beam is emitted from (11) to scan the furnace wall (3) of the measurement target chamber (2), and by the scanning, the moving distance L of the laser rangefinder (1) and the furnace wall from the reference point (12) are scanned. (3) Obtain information indicating directly or indirectly the relationship with the distance d to the irradiation site, and know the irregularities of the furnace wall (3) based on the information to obtain the furnace wall (3).
A method for diagnosing a coke oven wall, comprising: performing a diagnosis of a coke oven. 7. An apparatus provided with a laser range finder (1) for diagnosing the condition of a furnace wall (3) of a measuring object chamber (2) of a coke oven by measurement from above the furnace. The gantry (13) is provided with a laser beam irradiation unit (11) that is rotatable or rotatable around the reference point (12),
A means for setting the laser beam irradiation angle α at the time of scanning the furnace wall (3) by laser light, and a distance d (or a distance correlated to the distance d) from the reference point (12) to the irradiation part of the furnace wall (3) An apparatus for diagnosing a coke oven wall, comprising: means for measuring; and means for calculating the relationship between the irradiation angle α and the distance d (or a distance correlated to the distance d).