A method of installing fire resistant hanging tiles

Abstract

This invention provides a method for constructing refractory bricks. The refractory bricks are installed onto L-shaped hooks pre-installed on a water-cooled wall. Filler is then placed between adjacent refractory bricks, and finally, self-flowing castable refractory is poured between the refractory bricks and the water-cooled wall. This method allows the refractory bricks to be fixed to the side of the water-cooled wall in contact with flue gas (i.e., the heat exchange surface) using hooks. This not only prevents high-temperature corrosion of the water-cooled wall by flue gas but also effectively ensures the heat exchange efficiency of the water-cooled wall and extends its service life.

Description

Technical Field

[0001] This invention relates to the field of waste incineration, specifically to a method for constructing refractory brickwork. Background Technology

[0002] A waste incinerator is a device that incinerates municipal solid waste. In order to recover the heat from the waste incinerator, a heat exchanger is usually installed in the flue of the waste incinerator. However, if the water-cooled walls of the heat exchanger are exposed in the flue, the water-cooled walls will experience accelerated high-temperature corrosion due to the increased calorific value of the waste, and eventually the tubes will burst. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a method for constructing refractory bricks to solve the problem of high-temperature corrosion of water-cooled walls in the flue of an incinerator due to inadequate protection, as well as the problem of tube rupture caused by excessive corrosion.

[0004] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0005] A method for constructing refractory brickwork includes:

[0006] S10. Install the refractory brick onto the L-shaped hook pre-set on the water-cooled wall, wherein one side of the refractory brick is provided with an L-shaped fixing groove that cooperates with the L-shaped hook.

[0007] S20. Filler material is placed between adjacent refractory bricks;

[0008] S30. Pour self-flowing castable between the refractory bricks and the water-cooled wall.

[0009] Preferably, S10 includes:

[0010] Install the refractory bricks onto the L-shaped hooks pre-set on the water-cooled wall according to the preset staggered layering method.

[0011] Preferably, the pre-set staggered layering method includes staggering each layer of refractory bricks, staggering every two layers of refractory bricks, staggering every three layers of refractory bricks, and staggering every four layers of refractory bricks.

[0012] Preferred options also include:

[0013] S40. A slope is provided at the junction of the heated surfaces of the refractory bricks and the non-refractory bricks, wherein the slope is cast with refractory material.

[0014] Preferably, prior to S10, the following is also included:

[0015] S1. Install an L-shaped plastic sleeve on the L-shaped hook.

[0016] Preferred options also include:

[0017] S50. Weld V-shaped catch studs at the edges and / or opening areas of the water-cooled wall and apply castable refractory.

[0018] Preferably, in the area where the incinerator sidewall contacts the waste material layer, the refractory bricks are square in structure, with a thickness ranging from 40mm to 100mm and a side length ranging from 150mm to 200mm.

[0019] Preferably, in the furnace area, the refractory bricks are square in structure, with a thickness ranging from 20mm to 40mm and a side length ranging from 150mm to 200mm.

[0020] Preferably, the refractory bricks inside the flue are rectangular in structure, with a thickness ranging from 20mm to 40mm, a length ranging from 200mm to 360mm, and a width ranging from 170mm to 270mm.

[0021] Preferably, the refractory brick is composed of SiC, Si3N4, SiO2, Al2O3 and rare earth oxides, wherein the content of SiC is greater than or equal to 50% and the Si3N4 bound phase is greater than or equal to 13%.

[0022] Based on the above-described refractory brick installation method provided by the present invention, refractory bricks are installed on L-shaped hooks pre-installed on the water-cooled wall, filler is placed between adjacent refractory bricks, and finally, self-flowing castable is poured between the refractory bricks and the water-cooled wall. This refractory brick installation method allows the refractory bricks to be fixed to the side of the water-cooled wall in contact with flue gas (i.e., the heat exchange surface) using hooks. This not only prevents high-temperature corrosion of the water-cooled wall by flue gas but also effectively ensures the heat exchange efficiency of the water-cooled wall and extends its service life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a refractory hanging brick provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the fastener provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram illustrating the staggered arrangement of each layer of refractory bricks provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram illustrating the staggered arrangement of every two layers of refractory bricks provided in an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram illustrating the staggered arrangement of every three layers of refractory bricks provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram illustrating the staggered arrangement of every four layers of refractory bricks provided in an embodiment of the present invention;

[0030] Figure 7 A schematic flowchart illustrating a method for constructing refractory brickwork according to an embodiment of the present invention;

[0031] Figure 8 A schematic flowchart illustrating another method for constructing refractory bricks according to an embodiment of the present invention;

[0032] Figure 9 A schematic flowchart illustrating another method for constructing refractory bricks according to an embodiment of the present invention;

[0033] Figure 10 This is a schematic flowchart of another refractory brick construction method provided in an embodiment of the present invention.

[0034] Among them, refractory hanging brick 1, fixing groove 11, L-shaped hook 2, and L-shaped plastic sleeve 3. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] This invention provides a method for constructing refractory brickwork, see [link / reference]. Figure 7 and combined Figure 1 and Figure 2 , Figure 7This is a flowchart illustrating the construction method for refractory brick lining. Figure 1 This is a schematic diagram of the structure of refractory bricks. The construction method of refractory bricks includes at least the following steps:

[0038] S10. Install the refractory brick 1 onto the L-shaped hook 2 pre-set on the water-cooled wall, wherein an L-shaped fixing groove 11 that mates with the L-shaped hook 2 is provided on one side of the refractory brick 1.

[0039] It should be noted that the L-shaped hook 2 can be fixed to the water-cooled wall by welding or by snap-fitting, etc. Those skilled in the art can choose according to their needs.

[0040] It is worth noting that when installing the refractory hanging brick 1 on the L-shaped hook 2, the fixing groove 11 of the refractory hanging brick 1 needs to be aligned with the L-shaped hook 2, and then the L-shaped hook 2 can be inserted into the fixing groove 11 of the refractory hanging brick 1.

[0041] S20. Filler material is placed between adjacent refractory bricks 1.

[0042] It should be noted that by setting filler between adjacent refractory bricks 1, the filler can provide thermal expansion space for the refractory bricks 1, effectively preventing adjacent refractory bricks 1 from being squeezed by each other due to thermal expansion.

[0043] Preferably, the filling material is inorganic fiber cotton.

[0044] It should be noted that the filler can be inorganic fiber cotton or other refractory materials, and those skilled in the art can choose according to their needs.

[0045] Preferably, the inorganic fiber cotton is aluminum silicate fiber cotton.

[0046] S30. Pour self-flowing castable between the refractory brick 1 and the water-cooled wall.

[0047] It should be noted that by injecting self-flowing castable between the refractory bricks 1 and the water-cooled wall, the flue gas can be prevented from contacting the water-cooled wall through the gap between the refractory bricks 1, thereby further preventing the water-cooled wall from being corroded by high temperature.

[0048] The refractory brick 1 of this application has excellent thermal conductivity. Therefore, by installing multiple refractory bricks 1 on the side of the water-cooled wall that is in contact with the flue gas (i.e., the heat exchange surface), the flue gas can be separated from the water-cooled wall. This not only ensures the heat exchange efficiency of the water-cooled wall, but also effectively prevents the water-cooled wall from being corroded by high temperature, and effectively avoids the problem of tube rupture.

[0049] In this embodiment of the invention, refractory bricks 1 are installed onto L-shaped hooks 2 pre-installed on the water-cooled wall. Filler is then placed between adjacent refractory bricks 1, and finally, self-flowing castable is poured between the refractory bricks 1 and the water-cooled wall. Through the above-disclosed construction method for refractory bricks 1, the refractory bricks 1 can be fixed to the side of the water-cooled wall in contact with flue gas (i.e., the heat exchange surface) using hooks. This not only prevents high-temperature corrosion of the water-cooled wall by flue gas but also effectively ensures the heat exchange efficiency of the water-cooled wall and extends its service life.

[0050] Specifically, when performing step S10, step S10 includes the following steps:

[0051] Install the refractory bricks 1 onto the L-shaped hooks 2 pre-set on the water-cooled wall in a pre-set staggered manner.

[0052] It should be noted that the preset staggered layering method can be a staggered arrangement of each layer of refractory bricks (see reference). Figure 4 Alternatively, the refractory bricks can be staggered every two layers (see reference). Figure 5 ), or staggered arrangement for every three layers of refractory bricks (see reference) Figure 6 Or stagger every four layers of refractory bricks (refer to...). Figure 7 Regardless of which method is used, the refractory bricks 1 can interlock with each other, preventing any refractory brick 1 from detaching.

[0053] It is worth noting that, regardless of whether the refractory bricks are staggered in one layer, in one layer of two layers, in one layer of three layers, or in one layer of four layers, the staggered spacing is half the brick length.

[0054] Further, refer to Figure 8 The refractory bricklaying construction method also includes the following steps:

[0055] S40. A slope is provided at the junction of the refractory brick 1 and the heated surface of the non-refractory brick, wherein the slope is cast with refractory material.

[0056] It should be noted that by setting a slope at the junction of the refractory brick 1 and the non-refractory brick heating surface, ash accumulation at the junction of the refractory brick 1 and the non-refractory brick heating surface can be effectively avoided.

[0057] It should also be noted that the slope can be cast using SiC-SiO2 or Al2O3-SiO2 refractory materials, and those skilled in the art can choose according to their needs.

[0058] Preferably, the slope has an inclination angle of 45° to 75°.

[0059] It should be noted that the slope angle can be 45°, 75°, or 54°, and those skilled in the art can choose according to their needs.

[0060] Further, refer to Figure 9 Before performing step S10, the following steps are also included:

[0061] S1. Install an L-shaped plastic sleeve 3 on the L-shaped hook 2.

[0062] It should be noted that, due to the significant difference in the coefficients of thermal expansion between the L-shaped hook 2 and the refractory brick 1, the expansion of the L-shaped hook 2 under high-temperature conditions can easily cause the refractory brick 1 to crack or break, thus posing a high risk of detachment. Therefore, this application uses an L-shaped plastic sleeve 3 to cover the L-shaped hook 2. Since the L-shaped plastic sleeve 3 has a certain degree of elasticity, it can provide expansion space for the L-shaped hook 2 and the refractory brick 1, effectively preventing the refractory brick 1 from cracking or breaking due to thermal expansion of the L-shaped hook 2.

[0063] Preferably, the thickness of the L-shaped plastic sleeve 3 is 0.2mm to 2mm.

[0064] It should be noted that the thickness of the L-shaped plastic sleeve 3 can be 0.2mm, 2mm, or 1mm, and those skilled in the art can choose according to their needs.

[0065] Preferably, the L-shaped hook 2 is made of corrosion-resistant high-Cr and high-Ni stainless steel material, such as 304, 316, 310S, and 314 stainless steel.

[0066] Preferably, the L-shaped plastic sleeve 3 is made of rubber, TPE (thermoplastic elastomer), soft polyvinyl chloride and other plastics with a certain degree of elasticity, with a hardness range of 10~100 degrees (Shore A), and can be burned and decomposed when the temperature rises to above 400℃.

[0067] Preferably, the thickness of the refractory brick 1 is 20mm to 40mm.

[0068] It should be noted that the thickness of the refractory brick 1 can be 20mm, 40mm, or 25mm, and those skilled in the art can choose according to their needs.

[0069] Further, refer to Figure 10 After step S40 is completed, the following steps are also included:

[0070] S50. Weld V-shaped catch studs at the edges and / or opening areas of the water-cooled wall and apply castable refractory.

[0071] It should be noted that since refractory bricks 1 are not suitable for hanging at the edges and / or openings of the water-cooled wall, this application avoids high-temperature corrosion of the water-cooled wall by welding V-shaped anchors at the edges or openings of the water-cooled wall and laying castable refractory. The V-shaped anchors can effectively prevent the castable refractory from falling off the water-cooled wall, effectively extending the service life of the castable refractory and thus extending the service life of the water-cooled wall.

[0072] It should also be noted that the castable can be SiC-SiO2 or Al2O3-SiO2 refractory materials, and those skilled in the art can choose according to their needs.

[0073] In order to avoid uneven melting at the hook weld and excessive deviation of the outer end face of the L-shaped hook 2 from the same plane due to voltage fluctuations during welding, a dedicated voltage-stabilized welding equipment is used. The output voltage control accuracy is within ±1%. A three-inspection welding quality control system is implemented, including checking the material of the L-shaped hook 2 and the welding point before welding, monitoring the flatness every 10 L-shaped hooks 2 during welding, and checking the deviation distance of the outer end face after welding. The difference is controlled within 2mm.

[0074] Based on the refractory brick 1 construction method provided in the above embodiments, this application does not require replacing the water-cooled wall pipes or removing the pipes for construction, effectively reducing the construction difficulty of the refractory brick 1, and through the protection of the refractory bricks, it can effectively extend the service life of the water-cooled wall.

[0075] Specifically, in the area where the incinerator sidewall contacts the waste material layer, the refractory brick 1 has a square structure, the thickness of the refractory brick 1 ranges from 40mm to 100mm, and the side length of the refractory brick 1 ranges from 150mm to 200mm.

[0076] It should be noted that in the area where the incinerator sidewall contacts the waste material layer, the refractory brick 1 expands significantly due to the higher temperature in this area. Therefore, the refractory brick 1 is designed as a square structure with a thickness ranging from 40mm to 100mm and a side length ranging from 150mm to 200mm. This not only controls the expansion of the refractory brick 1 but also ensures that the expansion in all directions is consistent, thus avoiding excessive expansion in one direction that could lead to compression cracking.

[0077] Specifically, in the furnace area, the refractory brick 1 has a square structure, the thickness of the refractory brick 1 ranges from 20mm to 40mm, and the side length of the refractory brick 1 ranges from 150mm to 200mm.

[0078] It should be noted that in the furnace area, due to the high temperature, the refractory brick 1 expands significantly. By setting the refractory brick 1 to a square structure, with a thickness ranging from 20mm to 40mm and a side length ranging from 150mm to 200mm, the expansion of the refractory brick 1 can be controlled and made consistent in all directions. This avoids excessive expansion in one direction, which could lead to compression cracking, and also ensures the heat exchange efficiency of the water-cooled wall.

[0079] Specifically, inside the flue, the refractory brick 1 has a rectangular structure, with a thickness ranging from 20mm to 40mm, a length ranging from 200mm to 360mm, and a length ranging from 170mm to 270mm.

[0080] It should be noted that, inside the flue, due to the lower temperature in this area, the expansion of the refractory brick 1 is relatively small. Therefore, the refractory brick 1 is set as a rectangular structure with a thickness ranging from 20mm to 40mm, a length ranging from 200mm to 360mm, and a width ranging from 170mm to 270mm. The length-to-width ratio is 1.2 to 1.6, which can improve the construction efficiency of the refractory brick 1 and ensure the heat exchange efficiency of the water-cooled screen.

[0081] Specifically, the refractory brick 1 is composed of SiC, Si3N4, SiO2, Al2O3 and rare earth oxides, wherein the content of SiC is greater than or equal to 50% and the Si3N4 bound phase is greater than or equal to 13%.

[0082] It should be noted that the refractory brick 1 is composed of SiC, Si3N4, SiO2, Al2O3 and rare earth oxides, with SiC content greater than or equal to 50% and Si3N4 composite phase greater than or equal to 13%, so that the thermal conductivity of the refractory brick 1 is above 8W / (m·K), thereby effectively ensuring that the water-cooled wall can absorb and transfer the heat of the flue gas more efficiently.

[0083] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0084] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0085] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for constructing refractory brickwork, characterized in that, include: S10. Install the refractory brick onto the L-shaped hook pre-set on the water-cooled wall, wherein one side of the refractory brick is provided with an L-shaped fixing groove that cooperates with the L-shaped hook. S20. Filler material is placed between adjacent refractory bricks; S30. Pour self-flowing castable between the refractory bricks and the water-cooled wall.

2. The refractory brick construction method according to claim 1, characterized in that, S10 includes: Install the refractory bricks onto the L-shaped hooks pre-set on the water-cooled wall according to the preset staggered layering method.

3. The refractory bricklaying construction method according to claim 2, characterized in that, The preset staggered layering methods include staggering each layer of refractory bricks, staggering every two layers of refractory bricks, staggering every three layers of refractory bricks, and staggering every four layers of refractory bricks.

4. The refractory bricklaying construction method according to claim 3, characterized in that, Also includes: S40. A slope is provided at the junction of the heated surfaces of the refractory bricks and the non-refractory bricks, wherein the slope is cast with refractory material.

5. The refractory bricklaying construction method according to claim 1, characterized in that, Before S10, it also includes: S1. Install an L-shaped plastic sleeve on the L-shaped hook.

6. The refractory brick construction method according to claim 1, characterized in that, Also includes: S50. Weld V-shaped catch studs at the edge and / or opening area of ​​the water-cooled wall and apply castable refractory.

7. The refractory brick construction method according to claim 2, characterized in that, In the area where the incinerator sidewall contacts the waste material layer, the refractory bricks are square in structure, with a thickness ranging from 40mm to 100mm and a side length ranging from 150mm to 200mm.

8. The refractory brick construction method according to claim 2, characterized in that, In the furnace area, the refractory bricks are square in structure, with a thickness ranging from 20mm to 40mm and a side length ranging from 150mm to 200mm.

9. The method for constructing refractory brickwork according to claim 2, characterized in that, Inside the flue, the refractory brick has a rectangular structure, with a thickness ranging from 20mm to 40mm, a length ranging from 200mm to 360mm, and a width ranging from 170mm to 270mm.

10. The method for constructing refractory brickwork according to claim 1, characterized in that, The refractory brick is composed of SiC, Si3N4, SiO2, Al2O3 and rare earth oxides, wherein the content of SiC is greater than or equal to 50% and the Si3N4 bonding phase is greater than or equal to 13%.

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