JP2000009305A - Burner structure and method for setting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb thermal shocks and physical shocks which are imposed on the inner surface of a burner structure and suppress generation of cracks, by holding a liner member with a restoring force of a compressed inorganic fiber forming blanket, the liner member functioning as a nozzle for introducing flames, high-temperature gases and the like to an incinerator. SOLUTION: In setting a burner structure for introducing flames, high- temperature gases and the like into an incinerator, inorganic fiber forming boards 10a are, first of all, bonded with a heat-resisting bonding agent 10b so as to form a surrounding wall portion 10. Then, a hollow 11 is formed by scooping out the inside of the surrounding wall portion 10. Subsequently, the outer periphery of a liner member 13 is wrapped with an inorganic fiber blanket 12, and the inorganic fiber blanket 12 is tightly bound by means of a plurality of tape-like tightly-binding members 14 so as to maintain a compressed condition and to be fitted into the hollow 11. After being fitted, the tightly-binding members 14 are burned out by high-temperature fire, so that the inorganic fiber blanket 12 is released from the compressed condition, and thus the liner member 13 is held in the hollow 11 by a restoring force (rebound force) of the inorganic fiber blanket 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner structure for guiding a flame, a high-temperature gas, and the like into a combustion furnace, and an improvement in a method for constructing the burner structure.

[0002]

2. Description of the Related Art As combustion furnaces, those for firing various materials and for heating are known. This combustion furnace is generally provided with a burner structure for guiding a high-temperature gas generated by a flame or combustion into the furnace.

[0003] Conventional burner structures include SiC, Si ₃
There is known an amorphous refractory made of various hard sintered ceramics such as N ₄ , ZrO ₂ , Al ₂ O ₃ , MgO, mullite, etc., which is integrally formed as a whole.

[0004] The inside of the general burner structure is required to have a complicated shape depending on the purpose of increasing the combustion efficiency or the purpose of the combustion furnace.

[0005]

The hard ceramic material forming the burner structure has a problem that it is susceptible to thermal shock and easily cracks.

[0006] Here, the thermal shock refers to a case where a rapid temperature change is applied at the start of combustion, at the end of combustion, or the like. Particularly at the start of combustion, a rapid temperature change reaching 1000 ° C. or more is applied to the inner surface of the burner structure, and the thermal shock becomes extremely large.

[0007] The weakness of the above various hard ceramic materials to thermal shock is the hardness of the hard ceramic material. That is, since the material is hard, the material is not sticky, and it cannot withstand rapid thermal expansion at the time of thermal shock and cracks occur.

In addition, there is also a problem that cracks and chips are easily generated due to physical impact when the burner structure is attached due to its rigidity.

Furthermore, when various hard ceramic materials are thin because of their hardness, cracks and chips tend to occur and handling becomes difficult.
And there is a problem that it becomes heavy.

[0010] However, when the weight is heavy, the frequency of applying a large physical impact during handling increases, which may cause cracks and chipping during handling.
In addition, it also causes a decrease in workability during handling and installation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional burner structure, and a main object of the present invention is to absorb a thermal shock or a physical shock applied to the inner surface of the burner structure to crack the burner structure. It is an object of the present invention to provide a burner structure capable of suppressing generation of cracks and a method for constructing the burner structure.

Another object of the present invention is to provide a burner structure having high thermal shock resistance, high strength, thin and light weight, high physical shock resistance, easy handling, and excellent workability. It is to provide a construction method.

[0013]

The main features of the present invention are as follows.
In a burner structure called a burner tile, a liner member that functions as a kind of nozzle for guiding a flame or high-temperature gas into the furnace is held by the restoring force of a compressed inorganic fiber molded blanket. is there.

With the above-described structure, the thermal shock or physical impact applied to the liner member is absorbed by the inorganic fiber molded blanket, and the occurrence of cracks or the like in the liner member is suppressed. You.

Another feature of the present invention is that the liner member is composed of a ceramic composite mainly composed of a reinforcing material made of heat-resistant long fiber and a matrix prepared from heat-resistant powder and aluminum phosphate. It is.

That is, the burner structure according to claim 1 of the present application comprises an enclosure formed of a heat-resistant material, an inorganic fiber molded blanket held in a compressed state in a cavity formed in the enclosure, and The gist comprises a liner member held by a restoring force of an inorganic fiber molded blanket.

According to a second aspect of the present invention, in the burner structure of the first aspect, as the heat-resistant material constituting the surrounding wall portion,
The gist is that an inorganic fiber molded board is used.

According to a third aspect of the present invention, in the burner structure of the first aspect, the liner member is formed of fired ceramics.

According to a fourth aspect of the present invention, in the burner structure of the first aspect, the liner member comprises a matrix prepared from heat-resistant powder and aluminum phosphate, and a reinforcing material of heat-resistant long fiber.

According to a fifth aspect of the present invention, as the reinforcing material for the heat-resistant long fiber according to the fourth aspect, a woven fabric made of long fibers having a composition of Al ₂ O ₃ of 60% by weight or more and having a diameter of 5 to 20 μm is used. The main point is.

The gist of the invention of claim 6 is that the aluminum phosphate of claim 4 has a molar ratio of Al ₂ O ₃ to P ₂ O ₅ of 1: 2.5 to 1: 5.

According to a seventh aspect of the present invention, there is provided a method of constructing a burner structure, comprising forming a surrounding wall portion formed of a heat-resistant material and having a hollow portion, and in the hollow portion, a binding material which burns off an inorganic fiber molded blanket at a high temperature. The gist is that a liner member surrounded in a compressed state is loaded, and the liner member is held in the cavity by the restoring force of the inorganic fiber molded blanket released from the compressed state after the high-temperature burning of the binding material.

According to an eighth aspect of the present invention, in the method for constructing a burner structure according to the seventh aspect, an inorganic fiber molded board is used as a heat-resistant material constituting the surrounding wall.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION
This is shown in FIGS. In the figure, reference numeral 10 denotes an enclosing wall constituting the burner structure, 10a denotes an inorganic fiber molded board forming the enclosing wall, 10b denotes a board adhesive, 11 denotes a cavity formed in the enclosing wall, and 12 denotes a compressed inorganic material. A fiber blanket 13 is a liner member formed from a ceramic composite. As shown in FIG. 2, the outer periphery of a main portion of the liner member 13 is surrounded by the inorganic fiber blanket 12, and the fiber blanket is heated at a high temperature. A plurality of tape-shaped binding members 14 which are burned out are tied up and held in a compressed state, and are loaded into the hollow portion 11 to be constituted.
After the loading, the binding material 14 is burned off at a high temperature, the inorganic fiber blanket 12 is released from the compressed state, and the liner member 13 is moved by the restoring force (repulsive force) of the fiber blanket 12 as shown in FIG. Is held within.

[0025]

1 and 2 show an embodiment of the present invention. 1 and 2, reference numeral 10 denotes an enclosing wall constituting the burner structure, and 10a denotes an inorganic fiber molded board forming the enclosing wall. The board is bonded to the enclosing wall 10 with a heat-resistant adhesive 10b. Is composed. 11 is a hollow portion formed by hollowing out the inside of the surrounding wall portion, 12 is an inorganic fiber blanket, 13 is a liner member formed from a ceramic composite described later, and as shown in FIG. The outer periphery is surrounded by the inorganic fiber blanket 12, and the fiber blanket is held in a compressed state by being tied up with a plurality of tape-shaped tying members 14 which are burned out at a high temperature, and the fiber blanket is loaded into the hollow portion 11 to be constituted. I do. After the loading, the binding material 14 is burned off at a high temperature, the inorganic fiber blanket 12 is released from the compressed state, and the liner member 13 is moved by the restoring force (repulsive force) of the fiber blanket 12 as shown in FIG. Is held within.

The burner structure shown in FIG. 1 is provided so that the side surface 10c of the surrounding wall portion 10 is in contact with a combustion furnace (not shown), and blows out a flame or a high-temperature gas in the direction of an arrow. It becomes a structure to send to.

As the inorganic fiber molding board, a ceramic fiber or an alumina fiber obtained by curing and molding with an inorganic binder is used.

When an inorganic fiber molded board is used as a heat-resistant material for forming the surrounding wall, the inorganic fiber molded board has a small thermal conductivity and a small specific heat, so that the temperature rise when the burner is ignited is fast and the heat loss is high. Can be obtained. Further, the weight of the entire burner structure can be reduced.

As the inorganic fiber blanket, there can be used a so-called ceramic fiber or alumina fiber obtained by fiberizing a high-purity silica fiber material. This blanket has flexibility and elasticity.

According to the above configuration, even when a sudden thermal expansion difference occurs between the liner member and the inorganic fiber blanket holding the liner member when a thermal shock is applied to the liner member, the thermal expansion difference becomes It is absorbed by the elasticity of the inorganic fiber blanket, and it is possible to suppress excessive force from being applied to the liner member. Then, it is possible to prevent the liner member from cracking or being damaged due to the difference in thermal expansion.

Further, even if any impact force is applied to the liner member due to a change in the flow rate of the high-temperature gas, the impact force is absorbed by the elasticity of the inorganic fiber blanket, and an excessive force is applied to the liner member to cause cracking. And the liner member can be prevented from being damaged.

The ceramic composite forming the liner member 13 has a skeleton composed of heat-resistant long fibers, and a matrix material (base material) of the ceramic composite composed of heat-resistant powder and aluminum phosphate.

The aluminum phosphate is temporarily brought into a liquid state by heating during production or use, and penetrates into the heat-resistant long fiber, and as a result, fusion between the matrix material and the heat-resistant long fiber occurs. The matrix material is dispersed in the heat-resistant long fiber which is the skeleton, and a dense material can be obtained. In other words, the matrix material is present evenly in the heat-resistant long fiber, and the material having no unevenness is obtained.

[0034] The ceramic composite having the above-mentioned structure comprises:
It is characterized by high integrity, (b) strength, (c) stickiness of the material, (d) elasticity of the material, and (e) light. And it has high resistance to physical shock and thermal shock.

Further, the above-mentioned ceramic composite can be easily produced in various special shapes. This is useful when complex liner shapes are required.

As a reinforcing material made of heat-resistant long fiber, Al
Cloths composed of alumina long fibers with ₂ O ₃ not less than 60% by weight are preferred.

As the above-mentioned reinforcing material, a material containing Al ₂ O ₃ as a main component and further adding SiO ₂ , B ₂ O ₃ or the like may be used. In particular, it is preferable to include a small amount of B ₂ O ₃ because the strength at high temperatures increases.

The average fiber diameter of the heat-resistant long fiber is 5 μm to 2 μm.
0 μm, more preferably 7 μm to 12 μm.
m is more preferable.

As the heat-resistant powder, non-basic particles having an average particle diameter of substantially 10 μm or less and a melting temperature of 1500 ° C. or more are preferred. Here, the term “non-basic” refers to a substance substantially not containing an alkali metal or an alkaline earth metal.

As the heat-resistant powder, one or more kinds selected from alumina, aluminum hydroxide, silica sand, mullite, aluminum borate, high alumina chamotte and the like can be used.

When the average particle size of the heat-resistant powder is 10 μm or more, cracks tend to occur in the matrix material,
Attention must be paid to the fact that the reinforcing material made of heat-resistant long fibers tends to be damaged and the strength tends to be reduced.

It is preferable to use aluminum phosphate having a molar ratio of Al ₂ O ₃ to P ₂ O ₅ of 1: 2.5 to 1: 5. If the molar ratio of Al ₂ O ₃ to P ₂ O ₅ is smaller than the range of 1: 1.25 to 1: 5, the strength of the obtained ceramic composite tends to decrease, and Al ₂ O ₃ and P _{2 When} the molar ratio to ₂ O ₅ is greater than the range of 1: 1.25 to 1: 5, the viscosity of the paste-like matrix obtained in the intermediate state of the production of the obtained ceramic composite increases, forming the ceramic composite. In this case, workability is reduced.

As a specific method for obtaining aluminum phosphate, a method in which a required amount of phosphoric acid is added to the first aluminum phosphate is preferable. Liquid or powdery first aluminum phosphate can be used.

Hereinafter, an example of a basic manufacturing process of the ceramic composite will be described. (1) A paste-like matrix obtained by mixing a heat-resistant powder such as an alumina powder, an aluminum phosphate liquid, and another liquid (eg, water) is obtained. (2) The paste matrix is applied to a cloth made of heat-resistant long fiber (for example, alumina long fiber). (3) The cloth coated with the paste matrix is wound around a mold, dried, and removed from the mold.

The ratio of the heat-resistant long fiber to the heat-resistant powder and aluminum phosphate in the ceramic composite obtained in the above step is the sum of 6 to 30% by weight of the heat-resistant long fiber, heat-resistant powder and aluminum phosphate. Preferably, the proportion is 70 to 94% by weight.

In the ceramic composite obtained in the above step, if the ratio of the heat-resistant long fiber is 6% by weight or less, the strength and the thermal shock resistance of the ceramic composite become small.

When the proportion of the heat-resistant long fibers is at least 30% by weight, the proportion of the matrix material is too small.
It becomes difficult to form a composite. Further, since the existence of the matrix material between the heat-resistant long fibers as the skeleton becomes uneven, the energy does not disperse throughout the composite when an external force or a thermal shock is applied (in other words, the energy is locally dispersed). Concentrated) local destruction is likely to occur. Specifically, the strength of the ceramic composite decreases,
In addition, cracks and the like are likely to occur.

A small amount of an alkaline earth metal compound may be added as a hardening accelerator in order to facilitate the handling of the ceramic composite during molding. Examples of the curing accelerator include alumina cement, magnesium oxide, and wollastonite.

The blending amounts of the heat-resistant powder and aluminum phosphate can be appropriately selected depending on the intended purpose. Generally, it is preferable to use 6 to 30% by weight of aluminum phosphate based on the heat resistant powder. This means that the ratio of aluminum phosphate to heat-resistant powder was 6%.
When the content is not more than 30% by weight, the strength of the obtained ceramic composite tends to decrease. On the other hand, when the ratio of aluminum phosphate to the heat-resistant powder is not less than 30% by weight, the obtained ceramic composite is heated. This is because the shrinkage at the time of contact increases.

Next, various examples in which a liner member is formed from the ceramic composite will be described below.

Example 1 FIG. 3 shows an outline of the flow of a manufacturing process of a liner member. First, the following materials were kneaded to obtain a paste matrix. (1) 100 g of alumina powder (A42-2 manufactured by Showa Denko KK: average particle size of 3.2 μm) (2) Aluminum phosphate liquid (Acidophos 7 manufactured by Taki Chemical Co., Ltd.)
5) 20 g (3) Water 30 g The aluminum phosphate liquid has a molar ratio of Al ₂ O ₃ : P ₂ O ₅ of 1: 4.

Next, the above paste-like matrix was converted to an alumina long fiber cloth (Rubilon cloth CP-Nichias).
20) was uniformly applied at a rate of 0.2 g / cm ² . Further, the alumina long fiber cloth coated with the matrix material was wound in two layers around a cylindrical mold (not shown), and then dried using a dryer and removed from the mold. Thus, a liner member as a thin ceramic composite having a thickness of 0.9 mm and a density of 2.0 g / cm ³ was obtained. Next, a fiber blanket 12 made of alumina fiber was wound around the liner member.

In Example 1, as the fiber blanket 12, RF felt manufactured by Nichias was used. This material is an alumina fiber in which Al ₂ O ₃ occupies 95%, and αAl ₂ O ₃ crystallized by a high-temperature treatment is used as a main component.
It has the property of withstanding high temperatures up to 0 ° C. The attachment of the liner member 13 to the fiber blanket 12 is performed in a state where the fiber blanket is compressed by the tape-like binding material 14 which is burned off at a high temperature. At this time, the volume of the blanket was compressed by 20% or more. Thus, the liner member 13 and the fiber blanket 12 are integrated by the restoring force (repulsive force) of the compressed fiber blanket 12.

Next, a recess or opening having a required size for forming a cavity for loading a liner member is provided on the inorganic fiber molded board 10a, and the board is mounted with an adhesive 10b.
1 was formed. Here, T / # 546 manufactured by Nichias Co., Ltd. is used as the inorganic fiber molded board 10a.
One RF board was used. This product is a molded product having a heat-resistant temperature of 1700 ° C., obtained by blending various binders and fillers into rutile bulk fibers manufactured by Nichias and constituting an inorganic fiber blanket, and processing them into a board. The inorganic fiber molded board 10a used here does not have the elasticity and flexibility as the fiber blanket 12, but has sufficient strength to maintain the shape. When the surrounding wall portion 10 was obtained, the liner member 13 held by the fiber blanket 12 prepared above was inserted into the hollow portion 11 of the surrounding wall portion 10. Note that the binding material 14 which is burned out at a high temperature is burned out at the start of use, the compression of the fiber blanket 12 is released, and the liner member 13 is restored by its restoring force.
Is held within. In addition, in the use starting state, the liner member is exposed to a high temperature, and final firing is performed. At this stage, the liner member is achieved as a ceramic composite.

The burner structure obtained in Example 1 was
Flow combustion gas of 100 m / s or more, and burn and extinguish 10
Even after repeated tests, no cracks or the like were found in the liner member 13, and it was found that the liner member 13 had resistance to thermal shock and physical shock. The reason for this is that the restoring force of the compressed inorganic fiber blanket is used for the holding means of the liner member, and the ceramic composite as described above is used for the liner member.

Example 2 In this example, a paste formed by kneading the following materials was used as the matrix material of the ceramic composite constituting the liner member. (1) Alumina powder (A43-M manufactured by Showa Denko KK: average particle size 0.8 μm) 200 g (2) Aluminum phosphate liquid (Acidophos 1 manufactured by Taki Chemical Co., Ltd.)
20M) 30 g (3) 30 g of polyacrylic acid ester resin solution (Kogum HW-63 manufactured by Showa Polymer Co., Ltd.) (3) 30 g of water The aluminum phosphate solution has a molar ratio of Al ₂ O ₃ : P ₂ O ₅ of 1 : 3.

Using a paste-like matrix obtained by kneading the above-mentioned materials, a liner member was manufactured according to the manufacturing process shown in Example 1, and the liner member was manufactured using this.
The burner structure shown in FIG.

Example 3 In this example, the matrix material used was a kneaded mixture of the following materials to form a paste. (1) Alumina powder (A42-2 manufactured by Showa Denko KK: average particle size of 3.2 μm) 200 g (2) Aluminum phosphate liquid (first aluminum phosphate manufactured by Taki Chemical Co., Ltd.) 40 g (3) Polyacrylate resin liquid ( 15 g of Kogum HW-62 manufactured by Showa Polymer Co., Ltd. (3) 10 g of water The aluminum phosphate liquid has a molar ratio of Al ₂ O ₃ : P ₂ O ₅ of 1: 3.

Using a paste matrix obtained by kneading the above materials, a liner member was manufactured according to the manufacturing process shown in Example 1. In this example, the application to the alumina long fiber cloth was 0.3 g / cm ^2.
The thickness of the obtained liner member was 1.2 mm, and the density was 2.2 g / cm ³ . The burner structure shown in Example 1 was constructed using the liner member.

Example 4 In this example, the following matrix material was kneaded into a paste. (1) Alumina powder (Showa Denko A42-2: average particle size 3.2 μm) 196 g (2) Heat-resistant cement (Hi-Alumina Cement Super manufactured by Denki Kagaku) 4 g (3) Aluminum phosphate liquid (Taki Chemical Co., Ltd.) (1) Aluminum phosphate (30 g) (4) Polyacrylate resin solution (Kogum HW-62, Showa Kogyo Co., Ltd.) 15 g (5) 10% by weight orthophosphoric acid 15 g The aluminum phosphate solution is Al ₂ O ₃ : P The molar ratio of ₂ O ₅ is 1: 3.

Using a paste-like matrix obtained by kneading the above materials, a liner member was manufactured according to the manufacturing process shown in Example 1. In this example, the coating on the alumina long fiber cloth was 0.15 g / cm.
^{And 2} . Then, four layers of the alumina long fiber cloth coated with the paste matrix were wound around a liner type. The thickness of the liner member thus obtained is 1.2 mm,
Density was 1.8 g / cm ^3. Further, using the obtained liner member, a burner structure shown in FIG. 1 was formed according to the manufacturing process shown in Example 1.

Example 5 In this example, the matrix material used was the following material kneaded into a paste. (1) Mullite powder (manufactured by Taiheiyo Random Co., Ltd .: average particle size: 7.5 μm) 200 g (2) Aluminum phosphate solution (first aluminum phosphate manufactured by Taki Kagaku Co., Ltd.) 30 g (3) Polyacrylate resin solution (Showa Kobunshi) Cogum HW-62) 10 g (4) 20 wt% orthophosphoric acid 20 g The aluminum phosphate liquid has a molar ratio of Al ₂ O ₃ : P ₂ O ₅ of 1: 3.

Using a paste-like matrix obtained by kneading the above materials, a liner member was manufactured according to the manufacturing steps shown in Example 1. In this example, the coating on the alumina long fiber cloth was 0.2 g / cm ^2.
And The thickness of the liner member thus obtained is 0.8
mm, and the density was 2.0 g / cm ³ .

Embodiment 6 In this embodiment, an example in which silica-alumina-based inorganic fibers are used for the inorganic fiber blanket 12 and the surrounding wall portion 10 in the configuration shown in Example 1 will be described.
Here, T / # 5120 Fineflex manufactured by Nichias is used as the inorganic fibers constituting the inorganic fiber blanket 12, and T / # 5112 Fineflex hardboard manufactured by Nichias is used as the inorganic fiber molded board constituting the surrounding wall portion 10. Was.

These materials have a heat resistance temperature of about 1300 ° C., which is lower than the alumina-based material used in Example 1, but are characterized by being inexpensive. When the internal temperature of the furnace using the burner structure is low, the configuration shown in this embodiment is preferable from the viewpoint of cost.

Embodiment 7 This embodiment is suitable for a configuration in which the cost of the burner structure is reduced when the internal temperature of the furnace is high. The basic configuration of this embodiment is the same as that shown in the first embodiment. Therefore, unless otherwise specified, the configuration and the manufacturing method are the same as those shown in the first embodiment. In addition, what was shown in the Example other than Example 1 can be utilized for the manufacturing process and composition of a liner member. In the burner structure shown in FIG. 1, the side exposed to the highest temperature is the side surface 10c in contact with the furnace.
The side surface 10c is exposed in the furnace, and receives the reflection of the combustion gas injected from the burner structure, and becomes extremely hot. On the other hand, the part of the burner structure away from the furnace is not so hot. Therefore, in the structure shown in this embodiment, in a structure formed by bonding inorganic fiber molded boards in multiple layers, the first layer in contact with the furnace is made of alumina-based inorganic fiber having high heat resistance (but expensive). It is constituted by a molded board, and the other structural part is constituted by an alumina-based inorganic fiber molded board having low heat resistance but lower cost. By doing so, it is possible to provide a burner structure that can cope with a high furnace temperature and that has reduced costs. In order to further enhance the reliability, both the first and second layers of the burner structure which are in contact with the furnace are made of an alumina-based inorganic fiber molded board, and the other structures are made of an alumina-based inorganic fiber. You may comprise a fiber molding board.

[0067]

As described above, according to the present invention,
Since the liner member through which high-speed high-temperature gas passes is held by the restoring force of the compressed inorganic fiber molded blanket, a structure that mitigates sudden thermal expansion due to thermal shock and vibration caused by changes in the flow rate of high-temperature gas. It is possible to provide a burner structure which can be realized and can prevent crack generation and breakage in the liner member, and a method for constructing the burner structure.

In addition, according to the present invention, by forming the liner member from a thin, light and elastic ceramic composite, the handleability and workability are improved in addition to the high impact resistance described above. be able to.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view of a burner structure showing one embodiment of the present invention.

FIG. 2 is a perspective view of a liner member integrated with an inorganic fiber blanket.

FIG. 3 is a flowchart showing an outline of a production process of a liner member of the present invention.

[Explanation of symbols]

10 is a perspective view of a burner structure showing one embodiment of the present invention. 10a Inorganic fiber molded board 10b Adhesive 10c Side surface of board in contact with furnace 11 Cavity 12 Inorganic fiber blanket 13 Liner member 14 Binding material

Continuation of the front page (72) Inventor Kenichi Takahiro 1-8-1 Shintoda, Hamamatsu City, Shizuoka Prefecture Nichias Inside Hamamatsu Laboratory Co., Ltd. (72) Inventor Toshiyuki Yasu 1-8-1 Shintoda, Hamamatsu City, Shizuoka Prefecture Nichias Hamamatsu Corporation F term in the laboratory (reference) 3K017 CA10 CB04 CB11 CG03

Claims (8)

[Claims] 1. An enclosure formed of a heat-resistant material, an inorganic fiber molded blanket held in a compressed state in a cavity formed in the enclosure, and a liner held by the restoring force of the inorganic fiber molded blanket And a member. 2. The heat-resistant material forming the surrounding wall portion,
The burner structure according to claim 1, wherein an inorganic fiber molded board is used. 3. The burner structure according to claim 1, wherein the liner member is formed of fired ceramic. 4. The burner structure according to claim 1, wherein said liner member is formed of a matrix prepared from heat-resistant powder and aluminum phosphate, and a heat-resistant long fiber reinforcing material. 5. A heat-resistant long fiber reinforcing material comprising Al ₂ O
₃ is a burner structure according to claim 3, woven fabric is used consisting of long fibers having a diameter of 5~20μm having a composition of more than 60 wt%. 6. The burner structure according to claim 4, wherein the aluminum phosphate has a molar ratio of Al ₂ O ₃ to P ₂ O ₅ of 1: 2.5 to 1: 5. 7. A liner member, which is formed of a heat-resistant material and has a hollow portion and has a hollow portion, is loaded with a liner member which is surrounded in a compressed state by a binding material which burns off an inorganic fiber molded blanket at a high temperature. A method of constructing a burner structure, characterized in that a liner member is held in a hollow portion by a restoring force of an inorganic fiber molded blanket released from a compressed state after high-temperature burning of a material. 8. The heat-resistant material forming the surrounding wall portion,
The method for constructing a burner structure according to claim 7, wherein an inorganic fiber molded board is used.