JP6483349B2 - Coke oven combustion chamber observation device - Google Patents

Description

  The present invention relates to a coke oven combustion chamber observation device that is inserted into a combustion chamber of a coke oven and used when observing a furnace wall or the like in the combustion chamber.

  As the above-mentioned coke oven, for example, as shown in Patent Document 1, a structure in which a plurality of carbonization chambers and combustion chambers are alternately arranged is provided. In this coke oven, coke is produced by dry distillation of coal charged into the carbonization chamber at a high temperature. And the coke in a carbonization chamber is extruded outside by a coke extruder.

  By the way, in the carbonization chamber and combustion chamber of a coke oven used at high temperatures, the furnace wall is made of a refractory material such as a refractory brick. This refractory is known to deteriorate due to heat load, chemical load, mechanical load and the like. For example, a part of the furnace wall is altered by being held at a high temperature of 1000 ° C. or higher for a long time, or the furnace wall is eroded by volatile components of coal charged in the furnace. The furnace wall is damaged by the impact of the coke extrusion, and the furnace wall (refractory) is deteriorated.

Here, the carbonization chamber is provided with a coal charging hole, an insertion port for inserting a coke extruder, and a discharge port for discharging coke. By using such a device, the inside can be observed relatively easily.
On the other hand, in the combustion chamber, only a flue hole having an opening diameter of, for example, about 60 to 120 mm is provided in the ceiling portion, and it is difficult to observe the furnace wall inside the combustion chamber.
Therefore, as shown in Patent Documents 4-6, a coke oven combustion chamber observation device that observes the inside of the combustion chamber through a flue hole has been proposed.

In the above-described coke oven combustion chamber observation apparatus, excellent heat resistance is required because it is inserted into a high-temperature combustion chamber.
Here, in the coke oven combustion chamber observation apparatus described in Patent Document 4, the heat resistance is improved by adopting a double tube structure.
Moreover, in the coke oven combustion chamber observation apparatus described in Patent Document 5, heat resistance is improved by impregnating a sleeve having elasticity with water.
Furthermore, in the coke oven combustion chamber observation apparatus described in Patent Document 6, heat resistance is improved by disposing a heat insulator and a punching metal.

JP 2009-249453 A JP 2008-143966 A JP 2008-202004 A JP 2007-308536 A JP-T-2001-501719 JP 2007-063300 A

By the way, in the above-mentioned coke oven combustion chamber observation apparatus, it is necessary to ensure a certain observation field in order to confirm the furnace wall condition in the combustion chamber. Specifically, it is required to observe the joint portion between the refractory bricks while ensuring an observation field of view that is equal to or larger than the size of one refractory brick. Further, since the flue hole itself is also thermally deteriorated, it is also required to observe the inner peripheral surface of the flue hole. At this time, since the inner diameter of the flue hole is small, the distance between the coke oven combustion chamber observation device and the inner wall surface of the flue hole cannot be ensured.
Furthermore, from the viewpoint of operation, it is required to observe a plurality of combustion chambers in a short time. Here, the observation interval of the combustion chamber needs to consider the heat resistant temperature of the camera provided in the coke oven combustion chamber observation device, so it is necessary to suppress the temperature rise of the camera when inserted into the combustion chamber. .

  Here, in the coke oven combustion chamber observation apparatus described in Patent Document 4, in order to ensure an observation field of view, it is necessary to bring the camera close to the mirror. In this case, the camera is disposed in the vicinity of the observation window, and heat from the observation window directly acts on the camera, so that the temperature of the camera is likely to rise. For this reason, observation of a plurality of combustion chambers could not be performed in a short time. On the other hand, when the camera is arranged so as to be separated from the observation window in order to suppress the temperature rise of the camera, the observation visual field cannot be secured.

  Further, in the coke oven combustion chamber observation apparatus described in Patent Document 5, many optical elements such as lenses are used and an observation field is sufficiently secured. However, since the structure is complicated, it is very expensive. However, it was difficult to handle. Moreover, since it takes time to use the coke oven combustion chamber observation apparatus after use again, it is difficult to observe a plurality of combustion chambers in a short time.

  Furthermore, in the coke oven combustion chamber observation apparatus described in Patent Document 6, since the cooling mechanism is not provided, the heat resistance is insufficient. Moreover, since it is covered with punching metal, it is difficult to secure an observation field of view. Furthermore, since the camera whose temperature has risen after use cannot be sufficiently cooled, and it takes time to use the coke oven combustion chamber observation device after use again, observation of a plurality of combustion chambers is performed in a short time. It was difficult.

  The present invention has been made in view of the above-described situation, and is easy to handle with a simple structure. The inside of the combustion chamber of the coke oven can be observed with a sufficient observation field, and a plurality of combustion chambers are provided. An object of the present invention is to provide a coke oven combustion chamber observation apparatus that can be observed in a short time.

In order to solve the above-mentioned problem, a coke oven combustion chamber observation device according to the present invention is a coke oven combustion chamber observation device that is inserted into a combustion chamber of a coke oven and observes the combustion chamber. An observation room provided at the tip of the main body, a camera and a mirror housed inside the observation room, an observation window opened in a side wall portion of the tube main body, and a heat-resistant glass disposed in the observation window. The camera is disposed such that the optical axis of the camera is along the axis of the tube body, and the mirror is disposed on a line extending from the optical axis and facing the observation window. The distance L between the camera and the mirror on the optical axis and the axial length w of the observation window have a relationship of L ≦ w / 2, and the outer periphery of the camera is Covered by a shield cover, The outer surface of the emissivity of the compartment cover is characterized in that it is 0.2 or less.

According to the coke oven combustion chamber observation apparatus with this configuration, the distance L between the camera and the mirror on the optical axis of the camera and the axial length w of the observation window satisfy L ≦ w / 2. Since there is a relationship, the camera is arranged close to the mirror, and a sufficient observation field can be ensured. Therefore, an optical element such as a lens becomes unnecessary, and the structure is simple and easy to handle. In addition, the coke oven combustion chamber observation apparatus of the present invention can be manufactured at a low cost.
Moreover, since the outer peripheral part of the camera is covered with the shield cover, it is possible to suppress the heat from the observation window from directly acting on the camera, and to suppress the camera from being deteriorated by the heat. Further, since the temperature rise of the camera is suppressed by this shield cover, the used coke oven combustion chamber observation device can be inserted into the next combustion chamber in a short time, which is necessary for observation of a plurality of combustion chambers. Time can be shortened.

Moreover, since the emissivity of the outer surface of the shield cover is 0.2 or less, heat from the observation window can be reflected, and the temperature rise of the camera inside the shield cover can be reliably suppressed.

In the coke oven combustion chamber observation apparatus of the present invention, it is preferable that the heat-resistant glass reflects light having a wavelength of 0.8 μm or more.
In this case, since the heat-resistant glass disposed in the observation window reflects light in a so-called infrared region having a wavelength of 0.8 μm or more, the amount of heat input from the observation window can be suppressed. Therefore, the temperature rise of the camera can be suppressed, and a plurality of combustion chambers can be observed in a short time.

Furthermore, in the coke oven combustion chamber observation apparatus of the present invention, it is preferable that the mirror transmits light having a wavelength of 0.8 μm or more.
In this case, since the mirror transmits light in a so-called infrared region having a wavelength of 0.8 μm or more, the mirror does not reflect the light in the infrared region to the camera, and the temperature rise of the camera can be suppressed. .

In the coke oven combustion chamber observation apparatus of the present invention, the tube body has a double tube structure including an inner tube and an outer tube, and a cooling fluid is provided in a space between the inner tube and the outer tube. Is preferably distributed.
In this case, the tube main body in which the camera is accommodated has a double tube structure including an inner tube and an outer tube, and the cooling fluid is circulated in the space between the inner tube and the outer tube. The temperature rise of the camera can be suppressed, and the used coke oven combustion chamber observation device can be easily cooled, and a plurality of combustion chambers can be observed in a short time.

  As described above, according to the present invention, it is easy to handle with a simple structure, the inside of the combustion chamber of the coke oven can be observed with a sufficient observation field, and a plurality of combustion chambers can be observed in a short time. It is possible to provide a coke oven combustion chamber observation apparatus capable of performing the above.

It is a schematic explanatory drawing of the coke oven to which the coke oven combustion chamber observation device which is one embodiment of the present invention is applied. FIG. 2 is a partially enlarged explanatory view of the coke oven shown in FIG. 1. It is a section explanatory view of the coke oven combustion chamber observation device which is one embodiment of the present invention. It is expansion explanatory drawing of the camera periphery in the coke oven combustion chamber observation apparatus which is one Embodiment of this invention. It is a graph which shows the temperature change in the coke oven combustion chamber observation apparatus in the Example of this invention.

Hereinafter, a coke oven combustion chamber observation apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, this invention is not limited to the following embodiment.
The coke oven combustion chamber observation apparatus 50 according to the present embodiment is used when observing the situation inside the combustion chamber 11 of the coke oven 1 shown in FIG.

First, a coke oven 1 to which a coke oven combustion chamber observation apparatus 50 according to the present embodiment is applied will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the coke oven 1 includes a plurality of carbonization chambers 15 arranged in parallel, and a combustion chamber 11 is disposed between two adjacent carbonization chambers 15, 15 as shown in FIG. 2. Has been.

As shown in FIG. 1, the carbonization chamber 15 extends in one direction (left-right direction in FIG. 1) when viewed from above, a rising pipe 16 is disposed at one end, and a stand pipe 17 is disposed at the other end. It is arranged. A plurality of insertion holes 18 are formed between the rising pipe 16 and the stand pipe 17.
Moreover, the combustion chamber 11 is arrange | positioned through the furnace wall 13 between the two adjacent carbonization chambers 15 and 15, as shown in FIG. This furnace wall 13 is comprised with the refractory brick excellent in heat resistance. Further, the combustion chamber 11 is provided with a flew hole 12 extending upward. In this embodiment, the opening diameter of the flue hole 12 is in the range of 60 mm or more and 120 mm or less, and is smaller than the charging hole 18 of the carbonization chamber 15 described above.

A first rail 21 is disposed above the plurality of carbonization chambers 15 arranged in parallel so as to extend in the parallel direction of the carbonization chambers 15. A coal charging vehicle 31 is placed on the first rail 21. The coal charging vehicle 31 is configured to move along the first rail 21. The coal charging vehicle 31 includes a jumper pipe 32 connected to the stand pipe 17 of the carbonization chamber 15. As shown in FIG. 1, the jumper pipe 32 is configured to connect a carbonizing chamber 15 (charging furnace 15a) for charging coal with a carbonizing chamber 15 (adjacent kiln 15b) adjacent to the charging furnace 15a. Has been.
The present invention is also effective in a coke oven that does not include the stand pipe 17 of the carbonization chamber 15 and the jumper pipe 32 of the coal charging vehicle 31.

  Further, the second rail 22 is arranged on one end side (left side in FIG. 1) in the extending direction of the carbonizing chamber 15 so as to extend in the parallel direction of the carbonizing chamber 15. A coke extruder 40 is placed on the second rail 22. The coke extruder 40 is configured to move along the second rail 22.

  Further, the third rail 23 and the fourth rail 24 are arranged on the other end side (right side in FIG. 1) in the extending direction of the carbonizing chamber 15 so as to extend in the parallel direction of the carbonizing chamber 15. Yes. A coke guide wheel 35 is placed on the third rail 23, and a fire extinguishing wheel 37 is placed on the fourth rail 24. The coke guide wheel 35 is configured to move along the third rail 23, and the fire extinguishing vehicle 37 is configured to move along the fourth rail 24.

Next, an embodiment of a method for operating the coke oven 1 configured as described above will be described.
First, coal is charged into the carbonization chamber 15 (charging furnace 15 a) of the coke oven 1. The coal charging vehicle 31 is moved to the top of the charging kiln 15a, the lids of the stand pipes 17 of the charging kiln 15a and the adjacent kiln 15b are opened, the jumper pipe 32 is connected, and each of the charging kilns 15a is connected. The lid of the charging hole 18 is opened, and coal is charged into the charging furnace 15a.
On the other hand, in the combustion chamber 11, combustion gas is blown together with air and burned.

In the carbonization chamber 15 in which the coal is charged, the coal is carbonized by heat from the adjacent combustion chamber 11.
When the dry distillation of coal is completed, the coke in the carbonization chamber 15c is discharged using the coke extruder 40. As shown in FIG. 1, the coke extruder 40 on the 2nd rail 22 is moved to the one end side of the carbonization chamber 15c which discharges coke. On the other hand, the coke guide wheel 35 on the third rail 23 and the fire extinguisher 37 on the fourth rail 24 are moved to the other end side of the carbonizing chamber 15c for discharging the coke.

  Then, an extrusion ram 43 of the coke extruder 40 is inserted from one end side (left side in FIG. 1) of the carbonization chamber 15, and the coke guide wheel 35 in which the coke in the carbonization chamber 15 is disposed on the other end side of the carbonization chamber 15. To the fire extinguisher 37. In this way, coke is produced.

Here, since the carbonization chamber 15 and the combustion chamber 11 are maintained at a high temperature of 800 to 1200 ° C., a large heat load acts on the furnace wall 13 disposed between the carbonization chamber 15 and the combustion chamber 11. Therefore, the deterioration status is regularly monitored and repaired as necessary.
In the carbonization chamber 15, as shown in FIG. 2, a coke guide is provided with a relatively large-diameter charging hole 18 for inserting coal, an insertion port for inserting the extrusion ram 43 of the coke extruder 40, and coke. Since the discharge port for discharging to the car 35 and the fire extinguisher 37 is formed, the inside of the carbonization chamber 15 is relatively easy to observe, and the deterioration state of the side wall surface of the carbonization chamber 15 of the furnace wall 13 is monitored. Is possible.

On the other hand, in the combustion chamber 11, as shown in FIG. 2, only a relatively small diameter flue hole 12 is provided on the upper side, so that observation is difficult.
The coke oven combustion chamber observation device 50 according to the present embodiment is inserted into the combustion chamber 11 from the flue hole 12 and observes the inside of the combustion chamber 11. Further, the inner peripheral surface of the flue hole 12 is observed. Here, in the present embodiment, the width of the refractory bricks constituting the furnace wall 13 is set to about 300 mm, and it is preferable to secure 300 mm or more as the observation field of view.

Next, the coke oven combustion chamber observation apparatus 50 according to the present embodiment will be described with reference to FIGS. 3 and 4.
The coke oven combustion chamber observation apparatus 50 according to the present embodiment includes a tube main body 51, a camera 56 and a mirror 58 housed inside the tube main body 51, an observation window 54 opened in a side wall portion of the tube main body 51, And a heat-resistant glass 55 disposed in the observation window 54.

  As shown in FIG. 3, the pipe body 51 has a double pipe structure including an inner pipe 51a and an outer pipe 51b. Thermal insulation members 52a and 52b are wound around the outer peripheral sides of the inner tube 51a and the outer tube 51b, respectively. The inner pipe 51a and the outer pipe 51b are arranged coaxially about the axis O, and compressed air is circulated as a cooling fluid in a space formed between the inner pipe 51a and the outer pipe 51b. ing. Also, compressed air is circulated as a cooling fluid in the inner pipe 51a.

An observation chamber 53 is provided on the distal end side of the inner tube 51 a in the tube main body 51, and an observation window 54 is opened on the side wall of the observation chamber 53.
The observation window 54 is provided so as to extend in parallel with the axis O of the tube main body 51. A heat resistant glass 55 is disposed in the observation window 54. In the present embodiment, the heat-resistant glass 55 is provided with a reflective film that reflects light in an infrared region having a wavelength of 0.8 μm or more.

A camera 56 and a mirror 58 are disposed inside the observation room 53. The camera 56 is arranged so that the optical axis X of the camera 56 is along the axis O of the tube main body 51, and the mirror 58 is arranged on the extension line of the optical axis X and facing the observation window 54. Yes. In the present embodiment, the mirror 58 is configured to transmit light in an infrared region having a wavelength of 0.8 μm or more.
Here, as shown in FIG. 2, the distance L between the camera 56 and the mirror 58 on the optical axis X and the length w in the direction of the axis O of the observation window 54 have a relationship of L ≦ w / 2. Yes.

  A shield cover 57 is disposed outside the camera 56. The shield cover 57 has an outer surface radiation rate of 0.2 or less. Specifically, the shield cover 57 is made of aluminum or an aluminum alloy. In addition, since a passive film is formed on the surface of aluminum or an aluminum alloy, the emissivity does not change greatly depending on use.

The coke oven combustion chamber observation device 50 according to this embodiment is inserted into the combustion chamber 11 from the flue hole 12. At this time, the compressed air is circulated in the inner tube 51a and in the space between the inner tube 51a and the outer tube 51b.
Then, the state of the wall surface of the combustion chamber 11 facing the observation window 54 is observed by the camera 56 through the mirror 58.

In the coke oven combustion chamber observation device 50 according to the present embodiment configured as described above, the distance L between the camera 56 and the mirror 58 on the optical axis X of the camera 56 and the length of the observation window 54 in the direction of the axis O. Since w has a relationship of L ≦ w / 2, the camera 56 is arranged close to the mirror 58, and a sufficient observation field can be ensured. Therefore, an optical element such as a lens becomes unnecessary, and the structure is simple and easy to handle. Moreover, the coke oven combustion chamber observation apparatus 50 which is this embodiment can be manufactured at low cost.
In addition, in this embodiment, the joint part of refractory bricks can be easily observed by comprising so that an observation visual field larger than the width (300 mm) of a refractory brick may be ensured. Thereby, the deterioration state of the combustion chamber 11 side wall surface of the furnace wall 13 can be sufficiently observed. Further, the inner peripheral surface of the flue hole 12 having a small inner diameter can be sufficiently observed.

In this embodiment, since the outer periphery of the camera 56 is covered with the shield cover 57, the heat from the observation window 54 directly acts on the camera 56 even if the camera 56 is arranged close to the mirror 58. This can be suppressed and thermal degradation of the camera 56 can be suppressed.
In addition, since the temperature increase of the camera 56 is suppressed by the shield cover 57, the coke oven combustion chamber observation device 50 after use can be inserted into the next combustion chamber 11 in a short time, and a plurality of combustion chambers 11 can be inserted. It becomes possible to shorten the time required for observation.
In particular, in this embodiment, since the emissivity of the outer surface of the shield cover 57 is 0.2 or less, the heat from the observation window 54 can be sufficiently reflected, and the temperature of the camera 56 in the shield cover 57 can be reflected. The rise can be reliably suppressed.

In this embodiment, a heat-resistant glass 55 is disposed in the observation window 54, and the heat-resistant glass 55 is provided with a reflective film that reflects light in the infrared region having a wavelength of 0.8 μm or more. Therefore, the amount of heat input from the observation window 54 can be suppressed. Therefore, since the temperature rise of the camera 56 is suppressed, the used coke oven combustion chamber observation device 50 can be inserted into the next combustion chamber 11 in a short time.
Furthermore, in this embodiment, since the mirror 58 is configured to transmit light in the infrared region having a wavelength of 0.8 μm or more, the light in the infrared region is not reflected from the mirror 58 to the camera 56. The temperature rise of the camera 56 can be suppressed.

In the present embodiment, the tube body 51 has a double tube structure including an inner tube 51a and an outer tube 51b, and is compressed as a cooling fluid in the space between the inner tube 51a and the outer tube 51b. Since air is circulated, the temperature rise of the camera 56 can be suppressed, and the coke oven combustion chamber observation device 50 after use can be easily cooled. Therefore, the used coke oven combustion chamber observation device 50 can be inserted into the next combustion chamber 11 in a short time, and the time required for observation of the plurality of combustion chambers 11 can be shortened.
As described above, according to the coke oven combustion chamber observation apparatus 50 according to the present embodiment, handling is easy with a simple structure, and the inside of the combustion chamber 11 of the coke oven 1 can be observed with a sufficient visual field. It is possible to observe the combustion chamber 11 in a short time.

The coke oven combustion chamber observation apparatus according to the embodiment of the present invention has been described above, but the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the present invention.
For example, the structure of the coke oven (arrangement of the carbonization chamber and the combustion chamber, etc.) is not limited to that exemplified in this embodiment.

Below, the result of the confirmation experiment implemented in order to confirm the effect of this invention is demonstrated.
The coke oven combustion chamber observation apparatus described in the present embodiment was prepared as an example of the present invention. Moreover, the coke oven combustion chamber observation apparatus which does not have a shield cover as a comparative example was prepared.
And using the coke oven combustion chamber observation apparatus of the example of the present invention and the comparative example, it was inserted into the combustion chamber from the flue hole, and the inside of the combustion chamber was observed. At this time, the temperature near the camera was measured using a thermocouple. The measurement results are shown in FIG.
The heat-resistant temperature of the camera used in this example is 60 ° C.

  In the comparative coke oven combustion chamber observation apparatus having no shield cover, the temperature rose to a maximum temperature of 40 ° C. when inserted into the combustion chamber from room temperature (27 ° C.). Further, even after 360 seconds had elapsed since reaching the maximum temperature, the temperature was 30 ° C. or higher, and the temperature did not drop to room temperature. When a coke oven combustion chamber observation device is inserted into the next combustion chamber from a state of 30 ° C. or higher, the temperature may rise to a heat resistant temperature of 60 ° C. or higher. For this reason, even after 360 seconds, the next combustion chamber cannot be observed.

  On the other hand, in the coke oven combustion chamber observation apparatus of the present invention example in which the shield cover is arranged, the maximum temperature is 30 ° C., and after reaching 150 seconds after reaching the maximum temperature, the temperature decreases to almost room temperature. ing. Therefore, the coke oven combustion chamber observation device can be inserted into the next combustion chamber to observe the combustion chamber.

  From the above, according to the coke oven combustion chamber observation apparatus of the present invention, it was confirmed that a plurality of combustion chambers can be observed in a short time because the temperature rise of the camera is suppressed. .

1 Coke Oven 11 Combustion Chamber 50 Coke Oven Combustion Chamber Observation Device 51 Tube Main Body 51a Inner Tube 51b Outer Tube 53 Observation Chamber 54 Observation Window 55 Heat Resistant Glass 56 Camera 57 Shield Cover 58 Mirror

Claims (4)

A coke oven combustion chamber observation device inserted into a combustion chamber of a coke oven observing inside of the combustion chamber,
A tube main body, an observation chamber provided at the tip of the tube main body, a camera and a mirror housed in the observation chamber, an observation window opened in a side wall portion of the tube main body, and an observation window Heat resistant glass,
The camera is disposed such that the optical axis of the camera is along the axis of the tube body, and the mirror is disposed on a line extending from the optical axis and facing the observation window.
The distance L between the camera and the mirror on the optical axis and the axial length w of the observation window have a relationship of L ≦ w / 2,
The coke oven combustion chamber observation apparatus, wherein an outer peripheral portion of the camera is covered with a shield cover, and an emissivity of an outer surface of the shield cover is 0.2 or less.   The coke oven combustion chamber observation apparatus according to claim 1, wherein the heat resistant glass reflects light having a wavelength of 0.8 μm or more.   The coke oven combustion chamber observation apparatus according to claim 1, wherein the mirror transmits light having a wavelength of 0.8 μm or more.   The said pipe | tube main body is made into the double pipe structure provided with the inner tube and the outer tube | pipe, The cooling fluid distribute | circulates to the space between an inner tube | pipe and an outer tube | pipe. The coke oven combustion chamber observation apparatus according to any one of claims 3 to 4.

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