JP2014228229A - Thermal insulation lining structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal insulation lining structure which can be easily constructed.SOLUTION: A lining target surface 1a is provided with a thermal insulation layer composed of a foam glass layer 13 having open cells, and a heat resistant layer 14 in this order. For example, an adhesive material containing mortar is applied to at least a surface of the foam glass layer 13 on a side of the heat resistant layer 14 to cover the surface of the foam glass layer 13 with an adhesion layer 12.

Description

  The present invention relates to a heat insulating lining structure applicable to inner wall surfaces of tower tanks, industrial furnaces, ducts and the like.

  As a method of constructing a heat insulation lining for inner wall surfaces of tower tanks, industrial furnaces, etc., as disclosed in Patent Document 1, a single or multiple heat insulation layer is formed using red brick, and the top of this heat insulation layer is formed. There is a method of forming a heat-resistant layer using a refractory brick. Patent Document 1 that discloses this construction method states in paragraph [0008] that “the workability can be significantly improved during the construction of the hearth, retaining wall, etc. of the coke oven, and the long-term heat resistance of the furnace is realized. The purpose is " However, the method of Patent Document 1 is a method of constructing a heat insulating lining using a large number of red bricks. However, since red bricks are heavy and have poor workability, there is room for improvement at least in terms of workability.

JP 2010-70422 A

  The main problem to be solved by the present invention is to provide a heat insulating lining structure that can be easily constructed.

The present invention for solving this problem is as follows.
[Invention of Claim 1]
A lining structure in which a heat-insulating layer and a heat-resistant layer are provided in this order on the surface to be lined,
The heat insulating layer is a single layer structure or a multi-layer structure, and at least one layer is a foamed glass layer having open cells,
The surface of at least the heat-resistant layer side of the foamed glass layer is covered with an adhesive layer containing mortar,
A heat-insulated lining structure.

(Main effects)
Foamed glass is lightweight because it has open cells and closed cells. In addition, since foamed glass has open cells and closed cells, mechanical properties (mechanical properties) such as compressive strength and bending strength may be insufficient, but the surface of the foamed glass layer on the heat-resistant layer side contains mortar. When covered with the adhesive layer, the mechanical properties (strength and the like) of the structure are improved, and there is no fear that the mechanical properties are insufficient. Furthermore, since foamed glass has open cells, it absorbs moisture in the adhesive material containing mortar. However, for example, a material containing furan resin or water glass is used as the adhesive material to suppress moisture absorption. be able to.

[Invention of Claim 2]
The foamed glass layer has a true porosity measured in accordance with JIS R 2614: 1985 of 50 to 90%, and a ratio of open cells and closed cells measured in accordance with JIS K 7138: 2006 is 20 : 80-70: 30,
The heat-insulating lining structure according to claim 1.

(Main effects)
If the true porosity of the foamed glass layer is too low, the weight per unit volume may increase and the heat insulating property may be insufficient. On the other hand, if the true porosity of the foam glass layer is too high, the heat insulating property is excellent, but the strength may be insufficient. On the other hand, if the cell ratio of open cells is too high, mechanical properties such as compressive strength and bending strength may be insufficient. Moreover, if the bubble ratio of open cells is too high, a problem due to water absorption may occur. On the other hand, if the cell ratio of closed cells is too high, the production becomes difficult, and the surface becomes smooth, so that the adhesiveness with the adhesive layer may be insufficient. However, the above problems can be solved by setting the true porosity and the ratio of open cells and closed cells to the above ranges.

[Invention of Claim 3]
The mortar is a resin mortar.
The heat insulation lining structure of Claim 1 or Claim 2.

(Function and effect)
When the gas or liquid that comes into contact with the lining structure is alkaline, if the gas or liquid comes into contact with the foamed glass layer, silica, which is the main component of the foamed glass, may elute, but the resin mortar is resistant to alkali. Since it is excellent, silica elution can be reliably prevented. In addition, resin-based mortar is excellent in water-stopping property and prevents liquid from entering the foam glass layer, so that silica elution can be suppressed, and the decrease in thermal conductivity accompanying silica elution is also suppressed. be able to.

[Invention of Claim 4]
The foamed glass layer is configured by arranging a plurality of foamed glass blocks, and the surface and side surfaces of each foamed glass block are covered with an adhesive layer containing mortar,
The heat insulation lining structure of any one of Claims 1-3.

(Function and effect)
When the surface of the foam glass block is covered with an adhesive layer containing mortar, the water-stopping property of the entire lining structure is improved. Further, in the case where the foam glass layer is configured by arranging a plurality of foam glass blocks, if the side surface of each foam glass block is covered with an adhesive layer containing mortar, the adhesive layer is constructed in a lattice shape. Therefore, mechanical properties such as compressive strength and bending strength as the entire lining structure are improved.

[Invention of Claim 5]
The foamed glass layer is formed by laminating foamed glass sheets, and the foamed glass sheets adjacent to each other are bonded by an adhesive material including at least one of a resin-based mortar and a water glass-containing mortar,
The heat insulation lining structure of any one of Claims 1-3.

(Function and effect)
When the foamed glass layer is formed by laminating the foamed glass sheet, the foamed glass layer can be constructed by the foamed glass sheet having a uniform property in the thickness direction, so that the foamed glass layer is homogenized. Moreover, when each foam glass sheet adjacent to each other is bonded by a resin-based mortar or an adhesive layer containing water glass and mortar, the problem of water absorption hardly occurs, and the heat insulating property is extremely reduced. There is no fear.

[Invention of Claim 6]
The foam glass layer comprises a plurality of foam glass blocks formed by laminating foam glass sheets,
The surface on the side where the adjacent foam glass block of each foam glass block is located, and the surface on the heat-resistant layer side are covered with an adhesive layer containing at least one of a resin-based mortar and a water glass-containing mortar,
The foamed glass layer has a true porosity measured in accordance with JIS R 2614: 1985 of 50 to 90%, and a ratio of open cells and closed cells measured in accordance with JIS K 7138: 2006 is 20 : 80-70: 30,
The heat-insulating lining structure according to claim 1.

(Function and effect)
The effect by this invention is mentioned later.

  According to the present invention, the heat insulating lining structure can be easily constructed.

It is a schematic longitudinal cross-sectional view which shows the structure of the heat insulation lining of this form. It is a model front view which shows the structure of the heat insulation lining of this form. A foamed glass block (1) formed by laminating foamed glass sheets, and a foamed glass block (2) (3) formed by chamfering the foamed glass block. It is a model cross-sectional view which shows the construction example of a foam glass layer.

Next, an embodiment of the present invention will be described. The present invention is not limited to the embodiments described below, and various modifications can be made without departing from the spirit of the present invention.
[Use]
The heat insulation lining structure of this form is applicable with respect to inner wall surfaces, such as tower tanks, an industrial furnace, a duct. As tower tanks, for example, towers, tanks, tanks used when cleaning, storing, mixing, etc., chemicals such as acids and alkalis, flue gas used when treating exhaust gases such as acid gas and alkaline gas A processing tower, an absorption tower, a tank, a tank, etc. can be illustrated. Moreover, as an industrial furnace, the quencher etc. which were provided in the lower part of the incinerator other than a heating furnace, a soaking furnace, an incinerator, a melting furnace etc. can be illustrated, for example.

〔Basic structure〕
As shown in FIG. 1, the heat insulating lining structure 10 of this embodiment is a corrosion-resistant layer 11, an outer adhesive layer 12 </ b> A, and a heat insulating layer on the inner wall surface (surface to be lined) 1 a of a can body 1 constituting a tower tank or the like. The foamed glass layer 13, the inner adhesive layer 12B, and the heat-resistant layer 14 are laminated in this order. In the following, the entire adhesive layer including the outer adhesive layer 12A, the inner adhesive layer 12B, and the inter-block adhesive layer 12C described later may be denoted by reference numeral 12.

  The heat insulating lining structure 10 has a function of protecting the inner wall surface 1a of the can 1. The inner wall surface 1a to be protected may be made of metal such as steel, resin, or the like. It may be made of any material. Whatever material the inner wall surface 1a of the can body 1 is made of, it is required to have corrosion resistance, heat insulation, heat resistance, wear resistance, etc. against chemicals such as acid and alkali, acid gas, alkaline gas, etc. In this case, the heat insulating lining structure 10 of this embodiment can be suitably applied.

[Corrosion resistant layer (corrosion prevention layer)]
The corrosion resistant layer 11 preferably covers the lining target surface 1a continuously. By covering the lining target surface 1a with the corrosion-resistant layer 11, even if the heat insulating layer is constituted by the foamed glass layer 13 having open cells, there is no possibility that the lining target surface 1a comes into contact with chemicals or gases. As a result, it is possible to reliably prevent the lining target surface 1a from being corroded. However, when the can 1 is made of a material that is not likely to be corroded by chemicals, gases, or the like, the construction of the corrosion-resistant layer 11 can be omitted.

  The construction material of the corrosion-resistant layer 11 is, for example, a rubber material made of natural hard rubber, natural soft rubber, chloroprene synthetic rubber, butyl synthetic rubber, phenolic resin, furan resin, polytetrafluoroethylene resin, or epoxy resin. It is preferable to use a resin material made of the same, and it is more preferable to use a material in which each material is formed into a sheet shape. Particularly preferred is one constructed by a seamless corrosion-resistant sheet.

  In this respect, the corrosion-resistant layer 11 prevents the lining target surface 1a from being corroded. However, the corrosion-resistant layer 11 is usually constructed of rubber, resin, or the like, and thus is inferior in heat resistance and wear resistance. However, in the heat insulating lining 10 of this embodiment, the foamed glass layer 13 and the heat resistant layer 14 that are heat insulating layers are laminated on the corrosion resistant layer 11, so that the problem arises that the corrosion resistant layer 11 is inferior in heat resistance and wear resistance. There is no fear.

(Foamed glass layer)
The heat insulation layer of this form is comprised by the foamed glass layer 13 which has an open cell and a closed cell of a single layer structure. As shown in FIG. 2, the foamed glass layer 13 can be constructed by arranging a plurality of block-shaped foamed glass (foamed glass block) 13A vertically and horizontally. In the present invention, open cells and closed cells are synonymous with open cells and closed cells used in JIS K 7138: 2006.

  Although the foamed glass layer 13 of this embodiment has a single layer structure, it may have a multilayer structure. In the case where the foam glass layer 13 has a multi-layer structure, for example, as shown in FIG. 4 (1), the foam glass blocks 13A are arranged in the thickness direction in addition to arranging them in the vertical and horizontal directions. Can be built. Moreover, the foamed glass layer 13 having a multi-layer structure can be constructed, for example, by laminating sheet-like foamed glass (foamed glass sheet) 13x as shown in (2) of FIG. Furthermore, by setting the stacking direction of the foam glass sheet 13x in the vertical direction, for example, as shown in FIG. 4 (3), the foam glass sheet having a single layer structure while stacking the foam glass sheets 13x. Layer 13 can also be constructed. In this respect, since the foam glass sheet 13x is thin and excellent in the uniformity in the thickness direction, when the foam glass layer 13 is constructed using the foam glass sheet 13x, the foam glass layer 13 is excellent in homogeneity. It will be a thing.

  In addition, when making a heat insulation layer into a multi-layer structure, as long as at least 1 layer is made into a foam glass layer, another layer can also comprise a heat insulation layer using the other material which consists of a fireproof stone etc.

  Here, the physical properties of the foamed glass used by the present inventors are shown in Table 1 in comparison with the physical properties of anti-fluorite that can be used as a constituent material of the heat insulating layer.

  As apparent from this table, the foamed glass has a large number of open cells and closed cells, so that the bulk specific gravity can be lowered and the weight can be reduced. Accordingly, processing such as transportation and chamfering is easy, and workability for forming the heat insulating lining structure is improved. In addition, the foamed glass can make the thermal conductivity extremely low (insulating property), and can reduce the thickness of the insulating layer. Furthermore, foam glass can make strength, such as compressive strength and bending strength, more than anti-fluorite. On the other hand, although the heat-resistant temperature (heat resistance) of foamed glass is inferior to anti-fluorite, the problem due to heat resistance can be avoided by laminating the heat-resistant layer 14 on the foamed glass layer 13.

  When the lining target surface 1a is a flat surface, the foamed glass layer 13 is constructed by arranging a plurality of foamed glass blocks 13A side by side or by laminating a plurality of foamed glass sheets 13x as described above. Can do. On the other hand, when the lining target surface 1a is a curved surface or the like, it is preferable to prepare a plurality of foamed glass blocks 13A and appropriately construct the foamed glass blocks 13A by processing such as chamfering.

Here, an example of the manufacturing method of the foam glass sheet 13x and the foam glass block 13A will be described.
In manufacturing the foamed glass sheet 13x and the foamed glass block 13A, first, a glass material made of glass cullet (glass waste), glass beads, or the like is pulverized by a pulverizer. This pulverized diameter affects physical properties such as the thermal conductivity and true porosity of the obtained foamed glass, and the ratio of the ratios of open cells and closed cells.

  As the waste glass used as the raw material of the glass cullet, for example, glass that has been damaged during the manufacture of glass products such as plate glass, glass that has been cut off as unnecessary, and glass that has been collected as waste can be used. In this respect, virgin glass can also be used as the glass material, but using glass cullet is preferable because it leads to effective use of resources and reduction of manufacturing costs.

  A glass material made of glass cullet or the like is supplied to a pulverizer. As this pulverizer, for example, a ball mill, an atomizer, a hammer mill or the like can be used.

  The powder glass obtained by pulverizing the glass material is mixed with a foaming agent. As the foaming agent, for example, one or more kinds of carbon carbonate, calcium sulfate, sodium carbonate, silicon carbide, silicon nitride, aluminum nitride, carbon black and other carbon powder, alkali carbonate and the like are appropriately selected. Can be used. The selection of the foaming agent affects physical properties such as the thermal conductivity and true porosity of the obtained foamed glass, the ratio of open cells and the ratio of closed cells.

  A mixture made of powdered glass, a foaming agent, or the like is spread on, for example, a mold (a container for molding) having a size of 1000 mm × 1000 mm. This laying is performed so that the thickness of the mixture is, for example, 30 to 60 mm, and preferably 40 to 50 mm. When the thickness of the mixture is less than 30 mm, the operation for forming the foamed glass block 13A from the obtained foamed glass sheet 13x becomes troublesome. On the other hand, when the thickness of the mixture exceeds 60 mm, the obtained foamed glass sheet 13x may be inhomogeneous in the thickness direction.

  The formwork in which the mixture is spread is fed into a heating device such as a kiln, and the mixture made of powdered glass, a foaming agent, or the like is heated. This heating melts and sinters the powdered glass and foams the foaming agent. By controlling the melting, sintering, foaming, and the like, physical properties such as the thermal conductivity and true porosity of the obtained foamed glass, the ratio of open cells and closed cells can be adjusted.

  A fired product obtained by heating a mixture composed of powdered glass, a foaming agent, and the like is taken out of the heating device and removed from the mold. This demolded fired product can be used as the foamed glass sheet 13x as it is or by cutting into an appropriate shape.

  The foamed glass sheet 13x thus obtained is cut into, for example, a size of 300 mm × 300 mm, and further, for example, as shown in (1) of FIG. 3, the cut foamed glass sheet 13x is laminated. Thus, the foam glass block 13A can be obtained. At this time, the foam glass sheets 13x adjacent to each other can be pressure-bonded, fused, or laminated using an adhesive material. In addition, it is preferable to adhere | attach using the adhesive material etc. which are mentioned later, and it is more preferable to adhere | attach using the adhesive material containing the acid-resistant mortar containing a resin-type mortar or water glass.

  The number of laminated foam glass sheets 13x for obtaining the foam glass block 13A is not particularly limited. For example, the size of the foam glass block 13A is 300 mm in the horizontal size L1, 300 mm in the vertical size L2, and 100 mm in the thickness size L3. , 200 mm or 300 mm. The foam glass block 13A has a horizontal size L1 of 300 mm, a vertical size L2 of 300 mm, and a thickness size L3 of 100 mm, 200 mm, or 300 mm. Construction work becomes easy. In addition, the foamed glass block 13A has a plurality of types of thickness L3, in this embodiment, three types of 100 mm, 200 mm, and 300 mm, so that the lining target surface 1a of various shapes and sizes can be flexibly provided. Can respond.

  The foamed glass block 13A obtained as described above is chamfered so that the center part in the left-right direction is recessed with the foamed glass sheets 13x laminated in the vertical direction, as shown in FIG. Then, the chamfered surface F is formed, or as shown in (3) of FIG. 3, the chamfering process is performed so that the center portion in the left-right direction is recessed with the foam glass sheets 13x laminated in the left-right direction. Thus, the chamfered surface F can be formed.

  In addition, although detailed description is abbreviate | omitted, 13 A of foam glass blocks can also be formed by cut | disconnecting a block-shaped foam glass to a required dimension, for example. However, from the viewpoint of the homogeneity of the foam glass block 13A, it is preferable to obtain the foam glass sheet 13x by laminating.

  When the foamed glass layer 13 is constructed using the foamed glass sheet 13x or the foamed glass block 13A as described above, the thickness of the foamed glass layer 13 is such that the surface temperature of the corrosion-resistant layer 11 is heat resistant. The temperature should be such that no problem occurs. This thickness setting can be calculated using, for example, a steady one-dimensional heat conduction equation derived from Fourier's law.

  In addition, the foamed glass layer 13 has a thermal conductivity of 0.16 to 0.41 W / m · measured according to the hot wire method of JIS R 2616: 2001 by changing various conditions in the manufacturing process. K is preferable. If the thermal conductivity is too high, the heat insulating property may be insufficient. On the other hand, if the thermal conductivity is too low, the heat insulation is sufficient, but the strength may be insufficient.

  Similarly, the foamed glass layer 13 has a true porosity measured in accordance with JIS R 2614: 1985 of 50 to 90% by changing various conditions in the manufacturing process, and IS K 7138: 2006. It is preferable that the bubble ratio of the open cells and closed cells measured according to JIS is 20:80 to 70:30, and the open cells and closed cells measured according to JIS K 7138: 2006. It is more preferable that the ratio is 30:70 to 67:33. If the true porosity of the foamed glass layer 13 is too low, the foamed glass layer 13 may be weighted and heat insulation may be insufficient. On the other hand, when the true porosity of the foamed glass 13 layer is too high, the heat insulating property is excellent, but the strength may be insufficient. On the other hand, if the cell ratio of open cells is too high, the compression strength and bending strength may be insufficient. Moreover, if the bubble ratio of open cells is too high, a problem due to water absorption may occur. On the other hand, if the cell ratio of closed cells is too high, the production becomes difficult, and the surface becomes smooth, so that the adhesiveness with the adhesive layer may be insufficient.

  Furthermore, the foamed glass layer 13 has a compressive strength of 4.5 to 8.0 MPa measured according to JIS R 2615: 1995, for example, by changing various conditions in the manufacturing process, and JIS R 2619. : The bending strength measured according to 1995 is preferably 1.3 to 5.0 MPa.

[Insulation layer (other layers)]
As described above, the heat insulating layer can be constructed by laminating the foam glass layer 13 and a layer other than the foam glass layer. Layers other than this foamed glass layer are, for example, powdered heat insulating materials such as acid calcium heat insulating material, perlite heat insulating material, molded charcoal mug heat insulating material, and fibrous heat insulating materials such as asbestos, rock wool, glass surface, It can be constructed with ceramic heat insulating materials such as fireproof heat insulating bricks and porous acid resistant porcelain bricks, natural stone heat insulating materials such as anti-refractory stones, and the like.

(Adhesive layer)
The surface of the foam glass layer 13 on the heat resistant layer 14 side is covered with the inner adhesive layer 12B, and the surface of the foam glass layer 13 on the corrosion resistant layer 11 side is covered with the outer adhesive layer 12A. Furthermore, in this embodiment in which the foamed glass layer 13 is constructed by the foamed glass block 13A, the side surface of each foamed glass block 13A is covered with the inter-block adhesive layer 12C. The adhesive layers 12 such as the outer adhesive layer 12A, the inner adhesive layer 12B, and the inter-block adhesive layer 12C are formed of an adhesive material containing mortar, preferably having a main component (50% by mass or more).

  The foamed glass layer 13 has open cells and closed cells, so that the strength may be insufficient. However, if the surface of the foamed glass layer 13 on the heat-resistant layer 14 side is covered with the inner adhesive layer 12B containing mortar, the strength is insufficient. Is prevented. The effect of preventing insufficient strength becomes more certain when the surface of the foamed glass layer 13 on the side of the corrosion-resistant layer 11 is covered with the outer adhesive layer 12A containing mortar. Further, when the surface of the foam glass layer 13 is covered with the outer adhesive layer 12A and the inner adhesive layer 12B, the water-stopping property of the lining structure 10 as a whole is improved. Furthermore, in the case where the foam glass layer 13 is constructed by arranging a plurality of foam glass blocks 13A, if the side surface of each foam glass block 13A is covered with the inter-block adhesive layer 12C, the adhesive layer 12C is in a lattice shape. Therefore, the strength of the lining structure 10 as a whole is improved.

  The adhesive material used for the surface of the foam glass layer 13 on the heat-resistant layer 14 side and the adhesive material used for the inter-block adhesive layer 12C can be different materials, but the same adhesive material is used. Thus, it is preferable to form an adhesive layer. By using the same adhesive material, the entire adhesive layer has an integral structure, and the overall strength is improved. In addition, since it is not necessary to change the adhesive material, the construction (construction) time of the lining structure is shortened. Furthermore, it is more preferable to use the same adhesive material as the adhesive material used for the surface of the foamed glass layer 13 on the corrosion-resistant layer 11 side and the adhesive material used for the surface of the heat-resistant layer 14 side and the inter-block adhesive layer 12C. It will be a thing.

  The formation method of the contact bonding layer (joint layer) 12 is not specifically limited, For example, it can be by troweling. However, in the case where the foamed glass layer 13 is constructed with the foamed glass block 13A on the surface of the foamed glass layer 13, the adhesive layer 12 is obtained by applying an adhesive material containing mortar to the surface and side surfaces of the foamed glass block 13A. Is preferably formed. Thus, according to the method of directly applying the adhesive material to the surface of the foamed glass layer 13 or the foamed glass block 13A, there is an advantage that the adhesive material is easily adapted to the surface and side surfaces.

  On the other hand, as shown in FIG. 2, the inner adhesive layer 12B is formed by continuously applying an adhesive material on the entire surface of the foamed glass layer 13 after the foamed glass layer 13 is constructed, In the process of stacking the foam glass block 13A, an adhesive material is applied to the surface of the foam glass block 13A, that is, the inner adhesive layer 12B is formed simultaneously with the construction of the foam glass layer 13. be able to. Any of these forming methods is a method of applying an adhesive material to the surface of the foam glass layer 13 or the foam glass block 13A. The inter-block adhesive layer 12C between the adjacent foam glass blocks 13A is usually formed by applying an adhesive material to the foam glass block 13A.

  It is preferable to apply the above adhesive material so that the coating thickness is 3 to 5 mm. If the coating thickness of the adhesive material is less than 3 mm, the adhesive force may be insufficient. On the other hand, if the coating thickness of the adhesive material exceeds 5 mm, the economy may be inferior.

  As the mortar contained in the adhesive material, for example, inorganic mortar such as acid-resistant mortar containing water glass, resin-based mortar such as furan resin-based mortar, vinyl ester resin-based mortar, etc. It can be used according to the application. For reference, the physical properties of acid-resistant mortar containing water glass, furan resin mortar, and vinyl ester resin mortar are shown in Table 2.

  As is apparent from this table, each mortar has different physical properties, but in addition, acid-resistant mortar containing water glass has the property of being excellent in acid resistance. Moreover, furan resin mortar has the characteristic that it is excellent in acid resistance, alkali resistance, and heat resistance. Furthermore, the vinyl ester resin mortar is excellent in acid resistance and alkali resistance, and also has a characteristic of having resistance to nitric acid. In addition, when the adhesive material contains a resin-based mortar or an inorganic mortar containing water glass, moisture in the adhesive material is absorbed by the foamed glass layer 13 when the adhesive material is applied to the foamed glass layer 13. It is possible to obtain an effect that it is difficult to cause the problem.

The adhesive layer 12 formed from such an adhesive material preferably satisfies the following physical properties.
That is, the adhesive layer 12 preferably has a compressive strength of 65 to 85 MPa measured according to JIS R 2206: 1991.

[Heat resistant layer]
The heat-resistant layer 14 has a function of protecting the heat-insulating layer 13 and preferably has, for example, corrosion resistance and wear resistance in addition to heat resistance. From such a viewpoint, the heat-resistant layer 14 can be composed of ceramic products such as acid-resistant porcelain bricks and carbon bricks, natural stones such as granite, and the like. Ceramic products are materials obtained by heat-treating inorganic solid raw materials, and inorganic solid raw materials include natural raw materials (minerals) mainly composed of silicates and highly selected artificial raw materials.

  The heat-resistant layer 14 can be constructed by, for example, arranging block-shaped materials (heat-resistant blocks) 14A vertically and horizontally as shown in FIGS. Adhesion between the heat-resistant blocks 14A adjacent to each other can be performed using the adhesive material containing mortar described above.

Next, examples of the present invention will be described.
In this embodiment, a simulation is performed in the case where the heat insulating lining structure of the present invention is applied to a “smoke (exhaust gas) treatment tower of a waste incineration facility”.

  First, it is assumed that the exhaust gas is generated by incineration of waste and therefore contains corrosive gas such as hydrogen chloride. Further, the exhaust gas temperature is set to 400 ° C., and the outside air temperature is set to 35 ° C. On the other hand, the can body of the flue gas treatment tower is made of general SS41 and has a wall thickness of 12 mm. A corrosion-resistant sheet made of butyl rubber having a thickness of 4 mm is attached to the inner wall surface (lining target surface) of the can body thus formed to form a corrosion-resistant layer. Since the heat resistance temperature of butyl rubber is 110 ° C., the heat insulation layer, the heat resistance layer, and the like are constructed so that the surface temperature of the corrosion resistance layer is 100 ° C. or less. Moreover, since it presupposes presence of hydrogen chloride etc., a heat-resistant layer is constructed | assembled with an acid-resistant brick, and an inner side adhesion layer and an outer side adhesion layer are constructed | assembled using the acid-resistant mortar containing water glass.

Based on the above preconditions, the thickness of the heat insulating layer was calculated for the case where the heat insulating layer was constructed of a foam glass layer and the case where the heat insulating layer was constructed of natural firestone. The thickness was calculated by a steady one-dimensional heat conduction equation derived from Fourier's law. Here, as the foamed glass, one having a true porosity of 89% and a cell ratio of closed cells and open cells of 33:67 was used.
The results are shown in Table 3.

  As is clear from this table, in order to make the surface temperature of the corrosion-resistant layer made of butyl rubber (boundary temperature between the outer adhesive layer and the corrosion-resistant layer) 100 ° C. or less, the thickness of the anti-fluorite must be 165 mm. On the other hand, 75 mm is sufficient for the thickness of the foam glass layer. Therefore, if the heat insulating layer is constructed with a foam glass layer, the thickness of the heat insulating layer can be reduced to half or less compared with the case of constructing with anti-fluorite, and the inner diameter of the processing tower can be widened to increase the smoke emission capacity. It can be seen that the outer diameter of the processing tower can be reduced. Furthermore, there were no problems with mechanical properties such as compressive strength and bending strength.

  The present invention is applicable as a heat insulating lining structure applicable to inner wall surfaces of tower tanks, industrial furnaces, ducts and the like.

  DESCRIPTION OF SYMBOLS 1 ... Can body, 1a ... Inner wall surface (lining object surface), 11 ... Corrosion-resistant layer, 12, 12A, 12B, 12C ... Adhesive layer, 13 ... Foam glass layer, 13A ... Foam glass block, 13x ... Foam glass sheet, 14 ... heat-resistant layer, 14A ... heat-resistant block.

Claims (6)

A lining structure in which a heat-insulating layer and a heat-resistant layer are provided in this order on the surface to be lined,
The heat insulating layer is a single layer structure or a multi-layer structure, and at least one layer is a foamed glass layer having open cells,
The surface of at least the heat-resistant layer side of the foamed glass layer is covered with an adhesive layer containing mortar,
A heat-insulated lining structure. The foamed glass layer has a true porosity measured in accordance with JIS R 2614: 1985 of 50 to 90%, and a ratio of open cells and closed cells measured in accordance with JIS K 7138: 2006 is 20 : 80-70: 30,
The heat-insulating lining structure according to claim 1. The mortar is a resin mortar.
The heat insulation lining structure of Claim 1 or Claim 2. The foamed glass layer is configured by arranging a plurality of foamed glass blocks, and the surface and side surfaces of each foamed glass block are covered with an adhesive layer containing mortar,
The heat insulation lining structure of any one of Claims 1-3. The foamed glass layer is formed by laminating foamed glass sheets, and the foamed glass sheets adjacent to each other are bonded by an adhesive material including at least one of a resin-based mortar and a water glass-containing mortar,
The heat insulation lining structure of any one of Claims 1-3. The foam glass layer comprises a plurality of foam glass blocks formed by laminating foam glass sheets,
The surface on the side where the adjacent foam glass block of each foam glass block is located, and the surface on the heat-resistant layer side are covered with an adhesive layer containing at least one of a resin-based mortar and a water glass-containing mortar,
The foamed glass layer has a true porosity measured in accordance with JIS R 2614: 1985 of 50 to 90%, and a ratio of open cells and closed cells measured in accordance with JIS K 7138: 2006 is 20 : 80-70: 30,
The heat-insulating lining structure according to claim 1.

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