JP2007127359A - Observation device for inside of combustion chamber in combustion furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate necessity for provision of a relay lens which is expensive. <P>SOLUTION: A lens barrel device 11 to be inserted through the wall of a combustion furnace is equipped with a first cylinder 21 fitted at the outer extremity with an infrared camera 12 or a visible ray camera 13 and furnished near the inner end with a window member 23 to admit passage of the beams of light, a convex mirror 25 installed in the center of an opening at the inner end of the first cylinder, a concave mirror 26 installed at the inner end of the first cylinder for the reflected light by the convex mirror to be reflected on the outer extremity of the first cylinder, a second cylinder 22 arranged at the periphery of the first cylinder in such a fashion as generating a ring-shaped space S, and a first 28 and a second gas supply pipe 29 connected with the respective cylinders for supplying the cooling gas into the first cylinder and the ring-shaped space. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combustion chamber observation apparatus in a combustion furnace that burns, for example, garbage.

In a combustion furnace for burning waste such as garbage, it is necessary to grasp the combustion state of the waste, that is, the state of the combustion temperature on the waste surface in order to perform appropriate combustion.
By the way, in order to observe the combustion chamber in the combustion furnace with a camera device, it is necessary to pass through a thick furnace wall, and in order to avoid the influence of high temperature, a long barrel is used and a certain degree of field of view is secured. In addition, it is necessary to use a relay lens.

  By the way, an infrared camera using infrared rays is usually used to measure the temperature in the combustion chamber, but the furnace is cold in the visual field adjustment when installing the infrared camera. It is difficult to obtain data necessary for adjustment.

  For this reason, it is preferable to adjust the field of view by actually burning in a combustion furnace. However, in the infrared relay lens, measurement in the visible light range is impossible, so that the same size and the same field of view are expensive. It is necessary to prepare a visible light camera with an optical relay lens, which increases the equipment cost and replaces the relay lens to obtain a visible light image and an infrared image during operation of the combustion furnace. There is a problem that the work to be accompanied is dangerous.

  Accordingly, an object of the present invention is to provide a combustion chamber observation device in a combustion furnace that does not require an expensive relay lens.

  In order to solve the above-mentioned problems, a combustion chamber observation apparatus in a combustion furnace according to claim 1 of the present invention is configured such that a lens barrel device inserted into a wall portion of the combustion furnace has a camera device detachable at least at one end. And a light beam cylindrical body provided with a window member capable of allowing light to pass in the vicinity of the other end, a convex mirror provided at the center of the opening on the other end side of the light beam cylindrical body, and the light beam cylindrical body. A concave mirror for reflecting the reflected light from the convex mirror to one end side of the light beam cylindrical body, and a cooling means for cooling the light beam cylindrical body. .

  Further, the combustion chamber observation device in the combustion furnace according to claim 2 has a lens barrel device inserted into the wall portion of the combustion furnace, and at least two light beam exit ports are formed on one end side via a half mirror. And a light beam cylindrical body provided with a window member that allows light to pass in the vicinity of the other end, a convex mirror provided at the center of the opening on the other end side of the light beam cylindrical body, and the light beam cylindrical body. A concave mirror provided at the other end for reflecting the reflected light from the convex mirror to one end side of the light beam cylindrical body and a cooling means for cooling the light beam cylindrical body.

Moreover, the combustion chamber observation apparatus in the combustion furnace which concerns on Claim 3 is a cooling means in the combustion chamber observation apparatus of Claim 1 or 2.
A cooling cylindrical body arranged so as to form an annular space on the outer periphery of the light beam cylindrical body, and a gas supply pipe connected to the cooling cylindrical body for supplying a cooling gas into the annular space; It consists of

Moreover, the combustion chamber observation apparatus in the combustion furnace according to claim 4 comprises: cooling means in the combustion chamber observation apparatus according to claim 1 or 2;
A cooling cylinder disposed so as to form an annular space on the outer periphery of the light beam cylinder, and a first gas connected to the light beam cylinder and supplying a cooling gas to the light beam cylinder A supply pipe and a second gas supply pipe connected to the cooling cylinder and supplying a cooling gas into the annular space;
And the opening part which can connect the said cylindrical body for light beams and annular space is formed in the front-back position of the window member of the said cylindrical body for light beams.

  The combustion chamber observation apparatus for a combustion furnace according to claim 5 is characterized in that the cooling gas injected from the annular space is supplied to the other end portion of the cooling cylindrical body in the combustion chamber observation apparatus according to claim 3 or 4. A guide member is provided to be directed toward the center of the light beam tubular body.

  According to each of the above configurations, instead of providing an expensive relay lens for securing a certain length and field of view, a convex mirror is arranged at the center of the cylindrical body for light rays and a concave mirror is arranged at the outer peripheral end face thereof. Thus, it is possible to provide a combustion chamber observation apparatus that can obtain temperature data and a captured image of a combustion state in a wide visual field area that has a certain length and spreads outside the convex mirror with an inexpensive configuration. it can. Moreover, since the cooling means for cooling the cylindrical body for light beam is provided, it is possible to cope with a high temperature.

[Embodiment 1]
Hereinafter, a combustion chamber observation apparatus in a combustion furnace according to Embodiment 1 of the present invention will be described with reference to FIGS.

  In the present embodiment, an observation apparatus that can observe the temperature and the internal state of a combustion chamber of a waste combustion furnace (also referred to as a waste incinerator) for burning combustibles, for example, waste will be described.

First, a schematic configuration of the refuse combustion furnace will be described with reference to FIG.
The refuse combustion furnace 1 is, for example, a stoker furnace, and a combustion chamber 5 provided with a combustion bed 4 in which a grate 3 is arranged over a combustion stage and a post-combustion stage is provided in the furnace body 2. At the same time, a waste input port 2a to which a waste input hopper 6 is connected is formed on one end side of the furnace body 2, and an incineration residue discharge port 2b is formed on the other end side.

  The state in the combustion chamber 5 is observed on the ceiling wall 2c of the combustion chamber 5 of the furnace body 2 using infrared rays (hereinafter referred to as infrared light) and visible light (hereinafter referred to as visible light). A combustion chamber observation device 7 is provided.

  This combustion chamber observation device 7 can measure the radiant energy generated from the garbage which is a burned object using an infrared sensor and can photograph the internal state, and is a camera device for infrared photography (hereinafter referred to as infrared). Both a camera for light) and a camera device for photographing visible light (hereinafter referred to as a camera for visible light) are attached (detachable).

  That is, as shown in FIG. 2, the combustion chamber observation device 7 includes a lens barrel device 11 that is inserted through the ceiling wall 2 c and allows infrared light or visible light to pass therethrough, and an outer end of the lens barrel device 11. An infrared light camera 12 and a normal optical visible light camera 13 that are detachably (so-called interchangeable) are provided on the (one end) side, and are further photographed by the infrared light camera 12. Using the measured data, the temperature detection device 14 for detecting the combustion temperature of the dust in the combustion chamber 5 and the image data taken by the visible light camera 13 are used to detect the dust in the combustion chamber 5. And a state detection device 15 for detecting the combustion state.

  The lens barrel device 11 has a small-diameter first cylindrical body (light cylindrical body) 21 and an annular space S having a predetermined height outside the first cylindrical body 21 to form a double tube structure. A transparent material provided on the inner side near the tip (other end) of the first cylindrical body 21 protruding into the combustion chamber 5 of the large-diameter second cylindrical body (cooling cylindrical body) 22 and the first cylindrical body 21 A window member 23 (for example, sapphire glass is used), and a cone attached to the window member 23 via a stay 24 so that the apex of the first cylindrical body 21 faces the other end. A convex mirror 25 having a reflective surface in shape, a concave mirror 26 having a frustoconical reflective surface attached in a ring shape at a position opposite to the convex mirror 25 at the tip of the first cylindrical body 21, and the second An annular guide member 2 provided on the distal end surface of the cylindrical body 22 so as to be annular and inclined inward. When a first gas supply pipe 28 connected to the first cylinder 21, and a second gas supply pipe 29 for being connected to the second cylindrical member 22. Normally, these gas supply pipes 28 and 29 are connected to nozzle portions provided in the cylindrical bodies 21 and 22 (not shown).

  The gas supply pipes 28 and 29 are cooled to cool the cylindrical bodies 21 and 22 and to prevent dust floating in the combustion gas from entering the cylindrical bodies 21 and 22. Gas (also referred to as purge gas, for example, air is used, and in this sense, the gas supply pipe can also be referred to as an air supply pipe) is supplied into the combustion chamber 5 from the tip which is the inner end of each. It is made to erupt. A front opening and a rear opening 21a are provided at the front and rear positions of the window member 23 of the first cylindrical body 21 to allow the gas supplied into the first cylindrical body 21 to pass through the window member 23. A portion 21b is formed. Further, the gas ejected from the annular space S is throttled by the guide member 27 inclined inward, and the flow velocity is increased.

  Therefore, as shown by the arrow a in FIG. 2, the light beam from the dust surface is reflected toward the concave mirror 26 by the central convex mirror 25, and then reflected into the first cylindrical body 21 by the concave mirror 26. Then, the light is incident on the infrared light or visible light cameras 12 and 13 attached to the outer end side thereof. That is, with a simple configuration including the convex mirror 25 and the concave mirror 26, photographing (observation) can be performed in a wide field of view.

  During the operation of the refuse combustion furnace 1, the cooling gas is supplied from the first and second gas supply pipes 28 and 29 into the first cylindrical body 21 and the second cylindrical body 22 (annular space S). Then, both the cylindrical bodies 21 and 22 are cooled, and the cooling gas ejected from the tip of the second cylindrical body 22 is ejected toward the concave mirror 26 by the guide member 27 and the first cylindrical body. The cooling gas supplied into 21 enters the first cylindrical body 21 again from the front opening 21 through the annular space S from the rear opening 21a (of course, the cooling supplied from the second gas supply pipe 29). A part of the working gas also enters from the front opening 21b), and is jetted into the combustion chamber 5 from between the convex mirror 25 and the concave mirror 26. That is, at least the first cylindrical body 21 that is the main body of the lens barrel device 11 is cooled, and the dust in the combustion chamber 5 is prevented from entering the cylindrical bodies 21 and 22.

Next, the temperature detection device 14 and the state detection device 15 will be briefly described with reference to FIG.
The temperature detection device 14 is a two-dimensional sensor unit that inputs radiant energy (infrared energy) from the surface of the dust provided in the infrared camera 12 and converts it into electrical energy (the directional infrared sensor is vertically and horizontally). A / D conversion is performed by inputting detection signals (measurement data, specifically, electrical signals) detected at a predetermined time interval (so-called sampling). A / D conversion means 31 to be performed, and measurement data of each sensor converted by the A / D conversion means 31 (sensor output value corresponding to the amount of radiant energy) are input, and the measurement data of each sensor is converted into a convex mirror. A coordinate conversion means (also a coordinate acquisition means) 32 that performs arrangement conversion (sensor coordinate conversion) as if it were photographed at position 25, and a measurement data from the coordinate conversion means 32. The temperature conversion means 33 for inputting the output value and converting the measurement data corresponding to the radiation energy amount into the temperature based on a known conversion formula (for example, a conversion table can be used), and the temperature conversion The temperature data obtained by the means 33 is input, color information associated with a predetermined temperature range is referred to, the temperature data input from the temperature conversion means 33 is converted, and a two-dimensional temperature distribution image is created. Data such as temperature distribution image creation means 34, temperature obtained by the temperature conversion means 33 and temperature distribution image creation means 34 are input, for example, in response to an external request (if necessary), and a display device And an output means 35 for outputting to a measurement result storage device or an output data line (hereinafter referred to as a display device or the like).

  In addition, the state detection device 15 predetermines a detection signal (which is a charge amount) detected by a two-dimensional image sensor (not shown, for example, using a CCD) provided in the visible light camera 13. The A / D conversion means 41 that performs A / D conversion (so-called sampling) by inputting every time, and the detection data converted by the A / D conversion means 41 are input to obtain the detection data of each sensor. A coordinate conversion unit (also a coordinate acquisition unit) 42 that performs arrangement conversion (sensor coordinate conversion) as if the image was taken at the position of the convex mirror 25, and the coordinate position and detection data obtained by the coordinate conversion unit 42 For example, it comprises an output means 43 for inputting in response to an external request (if necessary) and outputting to a display device or an output data line (hereinafter referred to as a display device or the like). The first cylindrical body 21, the first gas supply pipe 28, the second cylindrical body 22 and the second gas supply pipe 29 constitute a cooling means, but at least the second cylindrical body 22 and The cooling gas may be supplied into the annular space S by the second gas supply pipe 29.

  In the above configuration, when the combustion state in the combustion chamber 5 is observed, the visible light camera 13 is attached to the outer end side of the lens barrel device 11, and the cooling gas is supplied from the gas supply pipes 28 and 29 to the cylindrical bodies. 21 and 22 are supplied and cooled.

In this state, the dust surface is photographed by the visible light camera 13.
That is, the light from the dust burning region is reflected outward by the convex mirror 25, and is guided by the concave mirror 26 into the first cylindrical body 21 through the window member 23 and input to the visible light camera 23.

  The image data obtained by the visible light camera 23 is input to the A / D conversion means 41 of the state detection device 15, converted into a predetermined electrical signal here, and then input to the coordinate conversion means 42. The coordinate conversion means 42 obtains the coordinate position corresponding to the combustion region, and therefore the image data and the corresponding coordinate position are input together to the output means 43, from which, for example, output to the image display device. Is done. That is, image data in a wide visual field region can be obtained.

  Next, when measuring the combustion temperature in the furnace, the visible light camera 13 is removed, the infrared light camera 12 is attached, and the infrared light camera 12 is connected to the temperature detection device 14 side. Of course, also in this case, the cooling gas is supplied from the supply pipes 28 and 29 to cool the lens barrel device 11.

The radiant energy from the dust surface is reflected by the convex mirror 25, reflected by the concave mirror 26 to the inside of the first cylindrical body 21, and input to the infrared light camera 12.
The measurement data obtained by the infrared light camera 12 is converted into an electrical signal by the A / D conversion means 31 and the coordinate position corresponding to the combustion region is obtained by the coordinate conversion means 32, and then the measurement data. And the coordinate position corresponding to this is input into the temperature conversion means 33, and is converted into temperature from the said measurement data (radiant energy).

  This temperature data is input to the temperature distribution image creating means 34, and the temperature data detected by each sensor with reference to the color data information associated with the predetermined temperature range is arranged in the sensor arrangement (coordinates). ) And color data at the coordinate position, and temperature distribution image data is created.

Next, the obtained temperature data and temperature distribution image data are input to the output means 35 and output to a display device or the like as necessary (request).
Thus, instead of providing an expensive relay lens for securing a certain length and field of view from the dust surface, a convex mirror 25 is arranged at the center of the first cylindrical body 21 and a concave mirror is provided on the outer peripheral end face thereof. By arranging 26, it is possible to obtain temperature data and a captured image of the combustion state in a wide visual field area having a certain length and extending outside the convex mirror 25 with an inexpensive configuration. In addition, since the cooling gas is supplied to each of the cylindrical bodies 21 and 22, at least the first cylindrical body 21 that is the main body of the lens barrel device can be protected from high temperatures.
[Embodiment 2]
Next, a combustion chamber observation apparatus in a combustion furnace according to Embodiment 2 of the present invention will be described with reference to FIG.

  In the first embodiment, the description has been made on the assumption that the optical camera and the infrared light camera are exchanged for the lens barrel device. However, in the second embodiment, the optical camera and the infrared light camera are used. The camera and the camera are attached together. Therefore, the same components as those in the first embodiment will be described using the same member numbers.

  That is, as shown in FIG. 4, the first light beam output opening that can take out light beams in directions different from each other by 90 degrees at the outer end portion of the lens barrel device 11, particularly the outer end portion of the first cylindrical body 21. (Emission port) 21c and a second light beam output opening (emission port) 21d are provided, and a half mirror 51 is provided at a position corresponding to the intersection of both the openings 21c and 21d, and the first cylindrical shape The infrared light camera 12 is attached to the first light beam output opening 21c disposed on the axis b of the body 21 and is disposed in a direction perpendicular to the axis b of the first cylindrical body 21. The visible light camera 13 is attached to the second light beam output opening 21d.

  Therefore, infrared light from the dust surface of the combustion chamber 5 passes through the half mirror 51 as it is and enters the infrared light camera 12, and the temperature is detected by the temperature detection device 14. On the other hand, the incident light of the visible light from the dust surface is changed by 90 degrees by the half mirror 51 and incident on the visible light camera 13, and a captured image is obtained by the state detection device 15. In the case of this visible light, since the image is reflected by the half mirror 51 to obtain an image that is upside down or left and right, it is converted by the coordinate conversion means 42 to become a correct image.

  According to this configuration, since the infrared light camera 12 and the visible light camera 13 are mounted on the lens barrel device 11, the object to be observed (temperature, combustion state) as in the first embodiment described above. Therefore, it is not necessary to replace the camera.

  By the way, in each said embodiment, the temperature detection apparatus which detects temperature based on the measurement data from the camera for infrared light, and the state detection apparatus which detects a combustion state based on the image data from the camera for visible light Although provided separately, these two devices may be combined. In this case, the A / D conversion means and the coordinate conversion means for the data obtained by the camera are shared, and the data type (contents) The parameter to be converted may be switched according to the above.

  Further, in each of the above embodiments, the cooling gas is used as the cooling means of the lens barrel device. However, for example, a cooling water may be used, and a heat pipe, a Peltier element, etc. may be used. It is also possible to have a configuration that suits.

It is sectional drawing which shows schematic structure of the refuse combustion furnace which concerns on Embodiment 1 of this invention. It is a principal part fragmentary sectional view of the combustion chamber observation apparatus in the refuse combustion furnace. It is a block diagram which shows schematic structure of the detection apparatus in the combustion chamber observation apparatus. It is a principal part fragmentary sectional view of the combustion chamber observation apparatus in the refuse combustion furnace which concerns on Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waste combustion furnace 2 Furnace main body 5 Combustion chamber 7 Combustion chamber observation apparatus 11 Lens barrel apparatus 12 Infrared type camera apparatus 13 Optical camera apparatus 14 Temperature detection apparatus 15 State detection apparatus 21 1st cylindrical body 21a Back opening part 21b Front opening Portion 21c first light beam output opening 21d second light beam output opening 22 second cylindrical body 23 window member 25 convex mirror 26 concave mirror 27 guide member 28 first gas supply pipe 29 second gas supply pipe 51 half mirror

Claims (5)

  A lens barrel device inserted through the wall of the combustion furnace, at least at one end, the camera device is detachable, and a light beam tubular body provided with a window member capable of allowing light to pass near the other end; A convex mirror provided in the center of the opening on the other end side of the cylindrical body for light rays, and one end side of the cylindrical body for light rays provided on the other end portion of the cylindrical body for light rays An apparatus for observing a combustion chamber in a combustion furnace, comprising: a concave mirror for reflecting light and cooling means for cooling the light beam tubular body.   The lens barrel device inserted into the wall portion of the combustion furnace is provided with at least two window exits for light rays through a half mirror on one end side and a window member that allows light rays to pass in the vicinity of the other end. A cylindrical body for light rays, a convex mirror provided at the center of the opening on the other end side of the cylindrical body for light rays, and reflected light from the convex mirror provided at the other end portion of the cylindrical body for light rays. An apparatus for observing a combustion chamber in a combustion furnace, comprising: a concave mirror for reflecting to one end of a cylindrical body for cooling; and a cooling means for cooling the cylindrical body for light.   The cooling means is arranged so as to form an annular space on the outer periphery of the light beam cylindrical body, and the cooling gas is supplied to the annular space by being connected to the cooling cylindrical body. The combustion chamber observation apparatus in a combustion furnace according to claim 1 or 2, wherein the observation apparatus is composed of a gas supply pipe. The cooling means is arranged so as to form an annular space on the outer periphery of the light beam cylindrical body, and the cooling gas is supplied to the light beam cylindrical body by being connected to the light beam cylindrical body. A first gas supply pipe that is connected to the cooling cylinder and a second gas supply pipe that supplies the cooling gas into the annular space,
3. The combustion furnace according to claim 1, wherein an opening that allows the light cylindrical body to communicate with the annular space is formed in front and rear positions of the window member of the light cylindrical body. Combustion chamber observation device. 5. The guide member for directing the cooling gas ejected from the annular space toward the center of the light beam tubular body is provided at the other end of the cooling tubular body. Combustion chamber observation device in a combustion furnace.

Images