JP3518991B2 - Combustion furnace - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a combustion furnace such as a refuse incinerator or a boiler.

[0002]

2. Description of the Related Art Conventionally, a combustion furnace has a window formed in the furnace body, and the combustion state such as whether or not the combustion air supplied into the furnace is sufficiently mixed with incomplete combustion gas is observed. People were observing through the window.

[0003]

According to the above-mentioned conventional technique, the observation result is inaccurate because the observer observes the combustion state, and the change of the supply amount of the combustion air based on the observation result is adjusted. Could not be properly controlled and it was difficult to completely burn.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a combustion furnace in which complete combustion is easy.

[0005]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] A laser velocity meter is arranged outside the furnace body, and a supply port of a particle supply device for the laser velocity meter is faced to an air blowing path of combustion air for the furnace body to supply the particles. A measurement that allows particles from the device to be carried into the furnace by the combustion air and to flow into the combustion gas in the furnace, and to allow the furnace body to measure the flow rate of the combustion gas with the laser anemometer. A window is formed, a plurality of the measurement windows are formed in the furnace main body, the probe of the laser anemometer facing the measurement window is supported on a support portion so that the probe can be repositioned, and each of the plurality of measurement windows is formed. It is configured so that it can be handled separately.

[Operation] [a] Particles are supplied from the particle supply device for the laser anemometer to the air passage for the combustion air to the furnace body. By this supply, the particles are carried into the furnace by the combustion air and flow into the combustion gas in the furnace.

[B] On the other hand, laser light is projected into the furnace through a measurement window of the furnace body by a laser anemometer arranged outside the furnace body. Specifically, for example, two parallel laser beams from a laser light source are focused on the focal point by a front lens in a probe of a laser anemometer, and a measurement volume composed of interference fringes is formed at a crossing point in a state of being located in a furnace. To do.

[C] Since the laser light is scattered when the particles pass through the interference fringes, scattered light containing velocity information thereof is detected by the photodetector of the laser anemometer through the measurement window.
The velocity of the particles, that is, the velocity of the combustion gas is obtained based on the detection information. Thus, according to the structure of claim 1, the flow velocity of the combustion gas having a high temperature can be measured.

[D] In a large furnace such as a refuse incinerator, a large number of particles are required to be supplied from the particle supply device, and the amount of air for particle transfer is increased accordingly. Therefore, a dedicated air for particle supply is supplied to this kind of furnace. In the structure provided with the passage, there is a problem that the flow velocity of the combustion gas is changed by the air sent from the air passage, which makes it difficult to accurately obtain the flow velocity of the combustion gas. With the supply port of the particle supply device facing the existing air flow path for combustion air,
Since the particles are sent into the furnace by the combustion air, the above problems can be avoided and the cost for forming the dedicated air passage is not necessary.

[E] By the above-mentioned actions [A] to [D], it is possible to measure the flow velocity of the combustion gas in the furnace, and for example, whether the combustion air supplied into the furnace is sufficiently mixed with the incomplete combustion gas. In addition to being able to correctly grasp the combustion state in the furnace, such as changing the supply amount of combustion air based on the measurement result of the flow velocity, it is possible to appropriately control the probe of the laser velocity meter. By changing it, it is possible to correspond to a plurality of measurement windows of the furnace body, so that it is possible to measure the flow velocity of the combustion gas over a wide range in the furnace.

[Effects] Therefore, it was possible to provide a combustion furnace in which the complete combustion is facilitated at a low manufacturing cost.

In addition to the fact that the flow velocity of the combustion gas can be clarified depending on the shape of the furnace and the supply conditions of the combustion air, for example, it becomes easy to design a combustion furnace with good performance. It has become possible to provide a combustion furnace in which it is possible to correctly understand the combustion state of a wide range of the inside and to more easily complete combustion.

The structure, action and effect of the invention according to claim 2 are as follows.

[Structure] A laser velocity meter is provided outside the furnace body, and a supply port of a particle feeder for a laser velocity meter is made to face a supply path of a combustion object to the furnace body to supply the particles. A measurement that allows the particles from the device to enter the furnace through the supply path and to be flown to the combustion gas in the furnace, and to allow the furnace body to measure the flow velocity of the combustion gas by the laser anemometer. A window is formed, a plurality of the measurement windows are formed in the furnace main body, the probe of the laser anemometer facing the measurement window is supported on a support portion so that the probe can be repositioned, and each of the plurality of measurement windows is formed. It is configured so that it can be handled separately.

[Operation] [f] The particle supply device for the laser anemometer supplies particles to the supply path of the combustion object to the furnace body. By this supply, the particles enter the furnace through the supply passage and are made to flow into the combustion gas in the furnace. In the hopper 1 as a vertical supply path in the refuse incinerator as shown in FIGS. 1 and 2, the particles enter the furnace together with the refuse, which is an object of combustion, by their own weight.

[G] On the other hand, laser light is projected through the measurement window of the furnace body into the furnace by a laser anemometer arranged outside the furnace body. Specifically, for example, two parallel laser beams from a laser light source are focused on the focal point by a front lens in a probe of a laser anemometer, and a measurement volume composed of interference fringes is formed at a crossing point in a state of being located in a furnace. To do.

[H] Since the laser light is scattered when the particles pass through the interference fringes, scattered light including velocity information thereof is detected by the photodetector of the laser anemometer through the measurement window.
The velocity of the particles, that is, the velocity of the combustion gas is obtained based on the detection information. That is, according to the configuration of claim 2, it becomes possible to measure the flow velocity of the combustion gas having a high temperature.

[Li] In a large furnace such as a refuse incinerator, a large number of particles are required to be supplied from the particle supply device, and the amount of air for conveying particles is increased accordingly. Therefore, a dedicated air for supplying particles to this type of furnace is used. In the structure provided with the passage, there is a problem that the flow velocity of the combustion gas is changed by the air sent from the air passage, which makes it difficult to accurately obtain the flow velocity of the combustion gas. Since the particles are fed into the furnace by facing the supply port of the particle supply device to the existing supply path of the combustion object, the above problems can be avoided, and the cost for forming the dedicated air path is unnecessary. Become.

[E] The flow rate of the combustion gas in the furnace can be measured by the above-mentioned actions [F] to [R], and whether the combustion air supplied into the furnace is sufficiently mixed with the incomplete combustion gas, for example. It is possible to correctly grasp the combustion state in the furnace such as the above, and to appropriately perform control such as change adjustment of the supply amount of combustion air based on the measurement result of the flow velocity.

[L] In the refuse incinerator as shown in FIGS. 1 and 2, there is a case where refuse solidified fuel called RDF is burned and the primary combustion air is not supplied to the dry stoker 3A. In such a case, However, by supplying particles to the hopper 1 as a supply path, the particles and dust can be mixed and supplied into the furnace, and in addition to being able to measure the flow rate of the combustion gas on the dry stoker 3A, By changing the position of the probe of the laser anemometer, it is possible to deal with a plurality of measurement windows of the furnace body, so that the flow rate of the combustion gas over a wide range in the furnace can be measured.

[Effects] Therefore, it was possible to provide a combustion furnace in which the complete combustion is facilitated at a low manufacturing cost.

Further, for example, the flow velocity of the combustion gas can be clarified depending on the shape of the inside of the furnace and the supply condition of the combustion air, and it becomes easy to design a combustion furnace with good performance. Furthermore, in the refuse incinerator as a combustion furnace, even if the primary combustion air is not put into the drying stoker,
In addition to being able to measure the flow velocity of the combustion gas and being able to achieve the above effects, it is also possible to correctly understand the combustion state of a wide range of parts in the furnace and It is now possible to provide.

The structure, operation, and effect of the invention according to claim 3 are as follows.

[Structure] In the structure of the invention according to claim 1 or 2, the support portion is a first support for supporting the probe so that the position of the probe can be changed in the direction in which the measurement windows are arranged and in the axial direction of the measurement window. Body and
The second support body is in a position-fixed state and supports the first support body so that the position of the first support body can be changed in the direction in which the measurement windows are arranged.

[Operation] In addition to the same operation as the operation according to the first or second aspect, the following operation can be performed (see FIGS. 2 and 3).

When the probe 14 is exposed to the target measurement window 12, the probe 14 and the first supporting body 19 are integrally repositioned with respect to the second supporting body 20 in a fixed state, and the probe 14 is moved to the above-mentioned position. The probe 14 is positioned near the measurement window 12, and then the probe 14 is repositioned with respect to the first support 19 to face the measurement window 12.

That is, the position of the probe 14 is roughly adjusted and then finely adjusted. When the probe 14 is exposed to another nearby measurement window 12 after the measurement from this measurement window 12 is completed, or when the probe 14 is exposed to the measurement window 12 near from the beginning, the probe 14 and the first support 19 are placed. The position of the probe 14 is changed with respect to the first support 19 to face the first support 19 without changing the positions of and with respect to the second support 20.

As described above, in the structure in which the position of the probe 14 is roughly adjusted in advance and then finely adjusted, for example, when a plurality of measurement windows 12 close to each other are individually measured, Probe 14
It is not necessary to change the position of the first support 19 and the first support 19 integrally with the second support 20.

When the probe 14 is moved in the axial direction of the measuring window 12 after facing the measuring window 12, the interference fringes through which the particles pass are repositioned in the axial direction. The flow velocity of combustion gas at multiple points can be measured (Fig. 3
reference).

[Effect] Therefore, in addition to the same effect as the effect according to the first or second aspect of the invention, in addition to being able to correctly grasp the combustion state of a wide area in the furnace, more complete combustion can be achieved. It became possible to provide an easy combustion furnace.
Further, when separately measuring a plurality of measurement windows 12 that are close to each other, it is not necessary to integrally change the position of the probe 14 and the first support 19 with respect to the second support 20, so that power can be saved. It became so.

The structure, operation, and effect of the invention according to claim 4 are as follows.

[Structure] In the structure of the present invention according to any one of claims 1, 2 and 3, in forming the measurement window, a heat-resistant member capable of transmitting light is provided in an opening formed in the furnace body. Along with fitting, a heat-resistant protective member that protects the heat-resistant member from the heat in the furnace on the inner side of the furnace body with respect to the heat-resistant member, a protective action posture for non-measurement, and a non-measurement A protective means is provided so as to be switchable between the protective posture and a blocking means for blocking a substance that blocks light transmission from adhering to the heat resistant member.

[Operation] In addition to the same operation as the operation by the configuration according to any one of claims 1, 2 and 3, the following operation can be performed.

When measuring the flow velocity of the combustion gas, the heat-resistant protective member is set in the non-protective working posture and then the laser beam is projected. The heat-resistant member is permeable to light, and the blocking means is provided for the heat-resistant member fitted in the opening of the furnace body, so that substances such as soot and water vapor that impede light transmission adhere to the heat-resistant member. I'm trying to prevent
The laser light can be transmitted through the heat resistant member to reach the inside of the furnace, and the scattered light can be detected by the photodetector through the heat resistant member, and the flow velocity of the combustion gas can be obtained.

When the flow velocity of the combustion gas is not measured, the heat resistant protective member is set in the protective action posture. Thereby, the heat resistant member can be protected from heat in the furnace.

Since the flow velocity of the combustion gas is measured as described above, even if the difference between the furnace pressure and the atmospheric pressure is large, the combustion gas is larger than the structure in which the opening is formed in the furnace body as a measurement window, for example. And there is an advantage that there is no access to the atmosphere.

[Effect] Therefore, while avoiding the instability of the combustion in the furnace due to the inflow and outflow of the combustion gas and the atmosphere, the same effect as that of the configuration according to any one of claims 1, 2 and 3. You can play. Further, the durability of the measurement window of the furnace body for measuring the flow velocity of the combustion gas could be improved.

The structure, operation, and effect of the invention according to claim 5 are as follows.

[Structure] In the structure of the invention according to claim 4, the blocking means is
It comprises a compressed air blowing mechanism for blowing compressed air to the inner surface side of the heat resistant member.

[Operation] In addition to the same operation as the operation according to the fourth aspect, the following operation can be performed.

For example, in a structure in which substances such as soot and water vapor that impede light transmission are prevented from adhering to the heat resistant member by repeatedly wiping the inner surface of the heat resistant member with the heat resistant wiping member, the surface of the heat resistant member is There is a possibility that the wiping member may be damaged or the wiping member may be deteriorated by the heat in the furnace. However, according to the configuration of claim 5, compressed air is blown from the compressed air blowing mechanism to the inner surface side of the heat resistant member. The above-mentioned inconvenience can be avoided because the substance that blocks the transmission of light is prevented from adhering to the heat-resistant member by spraying.

[Effect] Therefore, in addition to the same effect as the effect according to the fourth aspect, the durability of the measurement window can be further improved.

[0044]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a refuse incinerator which is an example of a combustion furnace. In this waste incinerator, a hopper 1 (corresponding to a supply path for the burning target) for charging the burning target waste is provided in the furnace main body 2, and a stoker 3 for burning the waste from the hopper 1 is installed in the furnace main body 2. The combustion chamber 4 is provided above the stoker 3, and the combustion chamber 4 is formed above the stoker 3 to supply the primary combustion air as combustion air into the combustion chamber 4 through the stoker 3 and the side wall 2A of the furnace body 2. A secondary combustion air supply device 6 for supplying secondary combustion air to the combustion chamber 4 through the formed blower port, and an ash discharge port 7 for taking out incinerated ash after combustion are provided.

The stoker 3 is composed of a dry stoker 3A, a combustion stoker 3B, and a post-combustion stoker 3C, and a primary air duct 8 (combustion for the furnace main body) through which the primary combustion air from the blower 30 of the primary combustion air supply device 5 is passed. (Corresponding to a ventilation air passage) is connected to the lower ends of the stokers 3A, 3B, 3C. In addition, a plurality of secondary air ducts 9 (corresponding to the ventilation air passages for the combustion air to the furnace body) that pass the secondary combustion air from the blower 30 of the secondary combustion air supply device 6 are connected to the side wall 2A of the furnace body 2. It is connected.

With the above structure, the dust thrown into the hopper 1 is primarily burned by the primary burning air while being sent in the order of the dry stoker 3A, the burning stoker 3B, and the post-burning stoker 3C. In the dry stoker 3A, the high temperature combustion gas generated by the combustion in the post-stage combustion stoker 3B and the post-combustion stoker 3C mainly dries the dust and starts a partial combustion. In the combustion stoker 3B, dust is mainly burned by the primary combustion air. The combustion gas in the primary combustion region above the dry stoker 3A and the combustion stoker 3B is 1
Reach high temperatures above 000 ° C. In the post-combustion stoker 3C, the primary combustion air is supplied in a state in which the air-fuel ratio becomes relatively larger than that of the dry stoker 3A and the combustion stoker 3B, and a large amount of unburned solid matter or incompletely burned solid matter is contained in the incineration ash. It is prevented from remaining.

As shown in FIGS. 2 and 3, a laser velocimeter 10 is provided outside the furnace main body 2, and lasers are provided on the plurality of primary air ducts 8, the plurality of secondary air ducts 9 and the hopper 1. Supply port 3 of a plurality of particle supply devices 11 for anemometer 10
2 (see FIG. 4) facing each other, the particles from the particle supply device 11 are carried into the furnace by the primary combustion air and the secondary combustion air, and also pass through the hopper 1 to be mixed with dust. A plurality of measurement windows 12 are formed in the furnace body 2 so as to be dropped into the furnace and flow into the combustion gas in the furnace, and which allows the laser gas flow meter 10 to measure the flow rate of the combustion gas.

As the particles, particles such as silica powder that are hard to burn and have a small specific gravity and follow the flow of combustion gas are used. As shown in FIG. 4, the particle supply device 11 will be briefly described. A particle hopper 33 in a vertical posture, a conveyor 34 that conveys particles from the particle hopper 33,
An air mixing unit that mixes particles from the conveyor 34 with air by the ejector 16 and conveys the particles. On the lower end side of the particle hopper 33, a mixing blade 25 rotating around the axis of the particle hopper 33 is provided to prevent the silica powder from aggregating.

The laser anemometer 10 obtains the velocity of the combustion gas by the differential light method. As shown in FIG. 2, the anemometer body 13 having a laser light source and the heat-resistant probe 14 facing the measurement window 12 are provided. Are connected via an optical fiber cable 15, and a photodetector and a first controller 17 for calculating the detection information are provided.

That is, the two parallel laser beams from the laser light source are focused on their focal points by the front lens in the heat-resistant probe 14, and a measurement volume consisting of interference fringes is formed at the intersection so as to be positioned in the furnace. , Scattered light containing velocity information scattered by the particles passing through the interference fringes,
The light is detected by the photodetector through the measurement window 12, and the velocity of the particles, that is, the velocity of the combustion gas is determined by the first controller 17 based on the detection information.

As shown in FIGS. 2 and 3, the heat-resistant probe 14 is supported by the supporting portion 18 so that the position thereof can be freely changed, and the plurality of measurement windows 12 can be individually supported. The support 18 includes a first support 19 that supports the heat-resistant probe 14 such that the position of the measurement window 12 is aligned in the vertical and horizontal directions and the axial direction of the measurement window 12, and the first support 19 is vertically positioned. And a second support body 20 in a position-fixed state that supports the position changeably.

The first support 19 has the frame portion in a vertical posture so that the heat-resistant probe 14 can be moved vertically and in the measurement window 1.
L-shaped frame 2 that supports the position changeable in the axial direction of 2
1 and a lower frame 23 that supports the laterally-positioned frame portion of the L-shaped frame 21 so as to be positionally changeable in the left-right direction. The positions of the heat-resistant probe 14 and the L-shaped frame 21 are changed by driving an electric motor via a slide movement mechanism.

As shown in FIG. 3, the heat-resistant probe 14 slides on a guide rail 24 provided in a vertically oriented frame portion of the L-shaped frame 21 so as to be vertically slidable by driving by an electric motor, The position is changed in the axial direction of the measurement window 12.

The second support member 20 has a lower frame 23.
It is composed of a plurality of fixed frames 22 in a vertical posture that support both ends of each of them separately. The position of the lower frame 23 is changed with respect to the fixed frame 22 by driving an electric motor via a slide movement mechanism.

Further, a position sensor for detecting the position of the heat resistant probe 14 and a second controller 26 for controlling each electric motor based on the detection information of the position sensor are provided. This makes it possible to know at which position in the furnace the flow velocity of the combustion gas was detected.

When the heat-resistant probe 14 is exposed to the target measurement window 12, the heat-resistant probe 14, the L-shaped frame 21, and the lower frame 23 are integrally moved with respect to the fixed frame 22 in the vertical direction so as to be heat-resistant. The probe 14 is positioned near the measurement window 12, and then the L-shaped frame 21 is moved to the left and right with respect to the lower frame 23, and the guide rail 24 (see FIG. 3) is moved to the L-shaped frame 21.
The position is vertically changed to face the measurement window 12.

The measurement window 12 is formed by forming an opening in the side wall 2A of the furnace body 2, and the opening is normally closed with a lid made of a heat-resistant material such as refractory brick to prevent combustion air from leaking. To do. Remove the lid when measuring. In this case, mutual circulation of the atmosphere and the combustion gas becomes free, but it does not matter if the pressure in the furnace does not change much from the atmospheric pressure.

With the above structure, particles are supplied from the particle supply device 11 to the primary air duct 8, the secondary air duct 9 and the hopper 1. By this supply, the particles are carried into the furnace by the combustion air and flow into the combustion gas in the furnace.

After the heat-resistant probe 14 is exposed to the target measurement window 12, as described above, a parallel beam from the laser light source is emitted.
The laser beam of the book is focused on its focal point by the front lens in the heat-resistant probe 14, and a measurement volume consisting of interference fringes is formed in the furnace at the intersection. When the particles pass through the interference fringes, the laser light is scattered. Therefore, the scattered light including the velocity information is detected by the photodetector of the laser velocity meter 10 through the measurement window 12, and the velocity of the particles Calculate the flow velocity of combustion gas.

When the heat resistant probe 14 is moved on the guide rail 24 in the axial direction of the measurement window 12, the interference fringes through which the particles pass are repositioned in the axial direction. The flow rate of combustion gas can be measured.

[Other Embodiments] In the above embodiment, the particle supply device 11 is provided for each of the primary air duct 8, the secondary air duct 9 and the hopper 1. However, the particle supply device 11 is one of them. The structure may be provided for at least one of the above.

The measurement window 12 may be formed as a double window as shown in FIG. That is, the heat resistant glass 27 as a heat resistant member is fitted into the opening formed in the furnace body 2,
Inner side of furnace body 2 than heat-resistant glass 27 (lower side of paper)
In addition, an iron partition plate 28 (corresponding to a heat resistant protection member) for protecting the heat resistant glass 27 from the heat in the furnace, and a partition plate opening / closing bar 31
Is provided so as to be swingable around the axis P between the protective action posture for non-measurement and the non-protective action posture for measurement, and substances such as soot and water vapor that block the transmission of light are heat-resistant glass 27. A blocking means 29 is provided for blocking the adherence to the. The blocking means 29 is composed of a compressed air blowing mechanism for blowing compressed air to the inner surface of the heat resistant glass 27.

In the above structure, when the flow velocity of the combustion gas is measured, the heat resistant glass 2 is operated by operating the partition plate opening / closing bar 31.
7 is set to the non-protective working posture, and then laser light is projected. The heat-resistant glass 27 can transmit light, and moreover,
Since the blocking means 29 is provided to prevent substances such as soot and water vapor that block the transmission of light from adhering to the heat-resistant glass 27, the laser light passes through the heat-resistant glass 27 and reaches the furnace. In addition, the scattered light can be detected by the light output detection unit through the heat resistant glass 27, and the flow velocity of the combustion gas can be obtained.

When the flow velocity of the combustion gas is not measured, the partition plate opening / closing bar 31 is operated to set the partition plate 28 in the protective action posture. Thereby, the heat resistant glass 27 can be protected from the heat in the furnace.

Since the flow velocity of the combustion gas is measured as described above, even when the difference between the pressure inside the furnace and the atmospheric pressure is large compared to the structure in which the opening is formed in the furnace body 2 as the measurement window 12, for example. Since there is no inflow or outflow of the combustion gas and the atmosphere, instability of combustion in the furnace can be avoided.

Since the heat-resistant glass 27 is detachably fitted in the opening, it can be replaced with another clean heat-resistant glass 27 if it becomes dirty due to long-term use.

The present invention can be applied to various boilers. In this case, the supply port of the particle supply device is exposed to the air blowing path of the combustion air to send the particles into the combustion chamber.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the internal structure of a refuse incinerator.

FIG. 2 is a schematic diagram showing an external structure of a refuse incinerator.

FIG. 3 is a diagram showing a support structure for a heat-resistant probe.

FIG. 4 is a schematic view showing a particle supply device.

FIG. 5 is a diagram showing a measurement window in another embodiment.

[Explanation of symbols]

1 hopper (supply path) 2 furnace body 3 stalker 3A dry stoker 3B combustion stoker 3C after-burning stoker 4 Combustion chamber 5 Primary combustion air supply device 6 Secondary combustion air supply device 7 Ash outlet 8 Primary air duct (air duct) 9 Secondary air duct (air duct) 10 Laser velocity meter 11 Particle feeder 12 Measurement window 13 Laser light source 14 probes 15 Optical fiber cable 16 ejectors 17 First control device 18 Support 19 First support 20 Second support 21 L-shaped frame 22 Fixed frame 23 Lower frame 24 Guide rail 25 mixing blades 26 Second control device 27 Heat-resistant glass (heat-resistant member) 28 Partition Board 29 blocking means 30 blower 31 Partition plate open / close bar 32 supply port 33 particle hopper 34 Conveyor

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-201413 (JP, A) JP-A-11-325432 (JP, A) JP-A-9-60857 (JP, A) JP-A-62- 41508 (JP, A) JP-A-8-170114 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23G 5/50

Claims (5)

(57) [Claims] 1. A laser anemometer is provided outside the furnace body,
The air supply path of the combustion air to the furnace main body faces the supply port of the particle supply device for the laser velocity meter, and the particles from the particle supply device are carried into the furnace by the combustion air and the inside of the furnace in configured to be flowed to the combustion gases, into the furnace body, the combustion furnace odor is formed a measuring window that allows measurement of flow velocity of the combustion gas by said laser velocimeter
A plurality of measurement windows are formed in the furnace main body, and the measurement windows are exposed.
Change the position of the laser velocimeter probe to the support.
Can be freely supported and can be used for each of the multiple measurement windows
Combustion furnace characterized by being configured into . 2. A laser velocity meter is provided outside the furnace body,
The supply path of the object to be burned to the furnace main body faces the supply port of the particle supply device for the laser velocity meter, and the particles from the particle supply device enter the furnace through the supply path and the inside of the furnace. in configured to be flowed to the combustion gases, into the furnace body, the combustion furnace odor is formed a measuring window that allows measurement of flow velocity of the combustion gas by said laser velocimeter
A plurality of measurement windows are formed in the furnace main body, and the measurement windows are exposed.
Change the position of the laser velocimeter probe to the support.
Can be freely supported and can be used for each of the multiple measurement windows
Combustion furnace characterized by being configured into . 3. The support unit is configured to measure the probe.
The position can be changed between the direction in which the windows are lined up and the axis of the measuring window.
A first support that supports the first support, and the first support that supports the measurement window.
The position-fixed state that supports the position changeable in the direction
The combustion furnace according to claim 1 or 2, wherein the combustion furnace is composed of two supports . 4. The furnace main body for forming the measurement window
Fit a heat-resistant member that can transmit light into the formed opening
Together with the inside of the furnace body than the heat-resistant member,
Heat-resistant protective member for protecting the heat-resistant member from heat in the furnace
The protective action posture for non-measurement and the non-protective action for measurement.
A substance that blocks the transmission of light and can be switched to the desired position
Is provided with a blocking means for blocking adhesion of the heat-resistant member to the heat-resistant member.
The combustion furnace according to any one of claims 1, 2 and 3 . 5. The blocking means is an inner surface side of the heat resistant member.
Composed of a compressed air blowing mechanism that blows compressed air onto the
The combustion furnace according to claim 4, wherein