JP2010084328A - Fire-resistant structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire-resistant structure with excellent strength. <P>SOLUTION: In this fire-resistant structure A, a surface of a concrete structure 1 is coated with a fire-resistive covering layer 2 which is constituted by solidifying monolithic refractories. A net-like body 3, which is formed of heat-resistant fibers impregnated with a thermoplastic resin and which has a through-hole, is arranged in the fire-resistive covering layer 2. The monolithic refractories 21 and 22 on both the sides of the net-like body 3 are connected and integrated together through the through-hole 31. The fire-resistive covering layer 2, which is integrated as a whole without being separated by the net-like body 3, has the excellent strength by having the net-like body 3 arranged inside. Thus, the durable period of the fire-resistant structure A is long. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

    The present invention relates to a refractory structure.

  Conventionally, the wall portion of an incinerator or industrial furnace is covered with a fireproof coating layer by applying or spraying an amorphous refractory such as castable or plast after a stud is provided on the inner surface thereof. The amorphous refractory is mainly composed of alumina and has sufficient heat resistance, but is insufficient in terms of reinforcing the wall itself.

  Patent Document 1 discloses a waste incinerator in which a heat-resistant fibrous heat insulating material is provided between an inner wall surface of an incinerator body and a heat-resistant concrete plate, and paragraph number [0014] It is described that the heat-resistant fibrous heat insulating material is a felt or blanket made of a heat-resistant ceramic such as silica fiber or alumina fiber.

  However, since the heat-resistant fibrous heat insulating material is felt or a blanket, the heat-resistant concrete composition constituting the heat-resistant concrete plate is not sufficiently impregnated, and the heat-resistant fibrous heat insulating material and the heat-resistant concrete plate are not impregnated. There is a problem that the integration with the incinerator becomes insufficient and the strength of the incinerator becomes insufficient. Also, the felt has a problem that the strength is directional and the strength varies.

Japanese Patent Application Laid-Open No. 9-100774

  The present invention provides a refractory structure having excellent strength.

  The refractory structure of the present invention is a refractory structure in which the surface of a concrete structure is coated with a refractory coating layer obtained by solidifying an amorphous refractory, wherein the refractory coating layer includes a thermosetting resin. A net-like body formed of heat-resistant fibers impregnated with selenium and having through-holes is disposed, and amorphous refractories on both sides of the net-like body are connected and integrated through the through-holes. To do. In the above refractory structure, the heat-resistant fiber contains basalt fiber.

  The fireproof structure of the present invention is an indeterminate shape in which a mesh body is disposed in a fireproof coating layer covering the surface of a concrete structure, and the fireproof coating layer is formed through a through hole formed in the mesh body. Since the refractories are connected and integrated, the refractory coating layer is integrated as a whole without being separated by the reticulate body, and the reticulate body is disposed inside and has an excellent strength, and the refractory structure The body has a long service life.

  And, the net-like body is impregnated with an amorphous refractory because the heat-resistant fiber is impregnated with a thermosetting resin, and the surface of the heat-resistant fiber is covered with the thermosetting resin and is in a smooth state. There is almost no gap between the mesh body and the fireproof coating layer, and the fireproof coating layer has excellent strength due to reinforcement by the mesh body.

Further, when the heat-resistant fiber contains basalt fiber, it is not corroded by alkali due to the amorphous refractory, and the refractory structure maintains excellent strength over a long period of time.

  Further, when the refractory structure is incinerated after being dismantled, the basalt fiber is not melted and carbonized while maintaining its form, so that the furnace wall of the incinerator is not damaged.

  An example of the fireproof structure of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the fireproof structure A is formed by covering the surface of the concrete structure 1 with a fireproof coating layer 2. Such a concrete structure 1 is not particularly limited, and examples thereof include an incinerator and a furnace wall portion of an industrial furnace.

  A fireproof coating layer 2 is laminated and integrated on the surface of the concrete structure 1. A stud 11 is fixed to the surface of the concrete structure 1, and the stud 11 is buried in the fireproof coating layer 2.

  The refractory coating layer 2 is formed by applying or spraying an amorphous refractory such as a castable refractory or plast to a predetermined thickness on the surface of the concrete structure 1 and solidifying it.

  Furthermore, a net-like body 3 is disposed in the fireproof covering layer 2, and the net-like body 3 improves the strength of the entire fireproof structure A.

  The mesh body 3 has a through hole 31, and the indefinite refractories 21 and 22 on both sides of the mesh body 3 are connected and integrated through the through hole 31 of the mesh body 3. Such a net-like body 3 is preferably a net-like body in which a plurality of fiber bundles are intersected and the intersections of the fiber bundles are integrated, and through holes are formed between adjacent fiber bundles. .

  Specifically, as the mesh body 3, for example, as shown in FIG. 3 or FIG. 4, a large number of fiber bundles 1a, 1a,... A plurality of fiber bundles 1b, 1b,... Are arranged at predetermined intervals, preferably 5 in a direction obliquely or perpendicular to the fiber bundle 1a of the fiber bundle row 1A. Fiber bundles 1B arranged in parallel every 20 mm, more preferably every 5 to 10 mm, and the intersections of the fiber bundles 1a and 1b of these fiber bundles 1A and 1B are made by heat fusion or adhesive. As shown in FIG. 5 or FIG. 6, a large number of fibers are provided on a surface of the mesh body obtained by integrating a number of through holes 31 by a known means. A bundle of fibers formed by arranging bundles 1d, 1d,... At predetermined intervals, preferably 5 to 20 mm, more preferably 5 to 10 mm. 1D is superposed in the direction oblique to the two fiber bundle rows 1A and 1B forming the network, and the fiber bundle 1a (1b) of the fiber bundle row 1A (1B) and the fiber bundle row 1D A net-like body formed by integrating a crossing portion with the fiber bundle 1d by an adhesive or heat fusion so as to provide a large number of through holes 31, a large number of fiber bundles as shown in FIG. 1d, 1d... Are arranged at predetermined intervals, preferably 5 to 20 mm, more preferably 5 to 10 mm, and a fiber bundle row 1D and a plurality of fiber bundles 1e, 1e. The fiber bundle row 1E, which is preferably arranged in parallel every 5 to 20 mm, more preferably every 5 to 10 mm, is overlapped in the oblique direction to the two fiber bundle rows 1A and 1B forming the network. In addition, the fiber bundle 1a (1b) of the fiber bundle row 1A (1B) and the fiber bundles 1d and 1e of the fiber bundle rows 1D and 1E are integrated by an adhesive or heat fusion to form a large number of through holes 31. Only formed reticulated body can be exemplified in which a so, the mesh body is preferably as shown in FIG. 5 which is excellent in various directions of strength. In addition, a net-like body can be manufactured using the method of Japanese Patent Publication No. 3-80911, for example.

  And as a heat resistant fiber which comprises the net body 3, it is not specifically limited, For example, although an aramid fiber, a basalt fiber (basalt fiber), etc. are mentioned, that it has the outstanding heat resistance, Basalt fibers are preferred. Examples of the aramid fiber include polyphenylene terephthalamide fiber and polyphenylene diphenyl ether terephthalamide fiber.

  Poly-p-phenylene terephthalamide fiber is commercially available from Toray DuPont under the trade name “Kevlar”, and poly-p-phenylene diphenyl ether terephthalamide fiber is commercially available from Teijin under the trade name “Technola”. Yes.

  The fiber bundle is a bundle of monofilaments, and is called a so-called multifilament. The monofilament may be twisted or non-twisted. Excellent, the net-like body 3 can be uniformly and sufficiently impregnated with thermosetting resin, has excellent mechanical strength in any direction, and obtains the net-like body 3 excellent in surface smoothness. Therefore, it is preferable that the monofilament is non-twisted.

  If the fiber diameter of the monofilament is thin, the strength of the network may be reduced. If the fiber diameter is thick, the formation of the fiber bundle may be hindered, so 2 to 30 μm is preferable, and 5 to 20 μm is more preferable.

  Further, if the fineness of the fiber bundle is low, the holding strength of the net-like body may be lowered, and if it is high, the thickness of the net-like body may be too thick. preferable.

  The mesh 3 is impregnated with a completely cured thermosetting resin. The surface of the fiber bundle constituting the mesh body 3 is covered with the thermosetting resin so that the mesh body 3 is impregnated with the thermosetting resin so as to form the fireproof coating layer 2. The formation of a gap between the irregular refractory and the mesh body 3 is prevented, and the mesh body 3 and the fireproof coating layer 2 are firmly integrated.

  Examples of the thermosetting resin impregnated in the network 3 include an epoxy resin, a polyimide resin, a phenol resin, a melamine resin, and a bismaleimide triazine resin.

  Even if the mesh body 3 is disposed as a single layer in the fireproof coating layer 2, a plurality of mesh bodies 3 are stacked in the thickness direction of the fireproof coating layer 2 as shown in FIGS. It may be arranged in a state or at intervals, but a plurality of mesh bodies 3, 3... Are arranged in the thickness direction of the fireproof coating layer 2 or at intervals. It is preferable to be provided.

  Next, the construction point of a fireproof structure is demonstrated. As shown in FIG. 8, a thermosetting resin formed from and impregnated with heat-resistant fibers on the surface of a concrete structure 1 such as a furnace wall of an incinerator or industrial furnace is preferably cured and passed through. A net-like body 3 formed with holes is disposed and temporarily fixed. The net body 3 may be a single sheet or may be disposed on the surface of the concrete structure 1 in a state where a plurality of net bodies 3 are overlapped. In addition, the thermosetting resin impregnated in the mesh 3 (3a, 3b) may be in an uncured state in consideration of handling, and the so-called mesh 3 (3a, 3b) is a prepreg sheet. It may be. However, since the reticulate body 3 (3a, 3b) may be warped or distorted due to the shrinkage of the thermosetting resin during the curing acceleration process of the thermosetting resin, the heat is applied before being disposed on the surface of the concrete structure 1. It is preferable to cure the curable resin.

  Thereafter, the stud 11 is fixed to the surface of the concrete structure 1 through a mortar having heat resistance. At this time, the reticulated body 3 may not be disposed in advance on the surface portion of the concrete structure 1 to which the stud 11 is fixed. Note that the mesh body 3 may be disposed on the surface of the concrete structure 1 after the stud 11 is fixed to the surface of the concrete structure 1.

  Next, an unshaped refractory before solidification is applied or sprayed on the mesh body 3 to impregnate the unstructured refractory through the through holes 31 of the mesh body 3, and the unstructured refractory is put into the concrete structure 1. The surface of the concrete structure 1 is brought into contact with the amorphous refractory, and the reticulated body 3 is buried and disposed in the amorphous refractory before solidification.

  As shown in FIG. 9, after applying or spraying a predetermined thickness of the amorphous refractory 3a before solidification onto the net 3a, the same network as described above is formed on the amorphous refractory 3a before solidification. The body 3b may be disposed, and the amorphous refractory 3b may be applied or sprayed on the mesh body 3b by a predetermined thickness. In this case, the irregular refractory 3b applied or sprayed on the mesh body 3b passes through the through-hole 31 of the mesh body 3b and is applied or sprayed on the concrete structure 1 before the mesh body 3b is disposed. It is necessary to be integrated with the fixed refractory 3a.

  And the refractory structure A can be constructed by forming the refractory coating layer 2 by solidifying the amorphous refractory applied or sprayed on the concrete structure 1 in a known manner.

  The refractory structure A thus obtained is provided with a net-like body 3 in the fire-proof covering layer 2, and the unstructured refractory 21 on the concrete structure 1 side with the net-like body 3 in the center. Since the irregular refractory 22 on the opposite side of the concrete structure 1 is connected and integrated through the through hole 31 of the mesh body 3, the fireproof coating layer 2 is separated by the mesh body 3. However, the fireproof coating layer 2 is integrated.

  Therefore, since the refractory coating layer 2 is integrated and the mesh body 3 is disposed therein, the refractory coating layer 2 has a very excellent strength. Has excellent strength.

It is the schematic cross section which showed an example of the fireproof structure of this invention. It is the schematic cross section which showed an example of the fireproof structure of this invention. It is the top view which showed an example of the net-like body. It is the top view which showed another example of the net-like body. It is the top view which showed another example of the net-like body. It is the top view which showed another example of the net-like body. It is the top view which showed another example of the net-like body. It is the schematic cross section which showed an example in the process of construction of a refractory structure. It is the schematic cross section which showed an example in the process of construction of a refractory structure.

Explanation of symbols

1 Concrete structure 2 Fireproof coating layer
21, 22 Unshaped refractory 3, 3a, 3b network
31 Through hole A Refractory structure

Claims (2)

The surface of the concrete structure is a fireproof structure formed by coating a fireproof coating layer obtained by solidifying an irregular refractory, and the heat resistant fiber impregnated with a thermosetting resin in the fireproof coating layer. A fireproof structure characterized in that a net-like body which is formed and has a through hole is disposed, and indefinite refractories on both sides of the net body are connected and integrated through the through-hole. The fire-resistant structure according to claim 1, wherein the heat-resistant fiber contains basalt fiber.

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