Fabricated glass fiber reinforced plastic chimney and construction technology

Abstract

The invention relates to the technical field of assembly type glass fiber reinforced plastic barrels, in particular to an assembly type glass fiber reinforced plastic chimney and a construction technology. The FPR prefabricated panel is an annular tile-shaped panel, the axial inner side of the FPR prefabricated panel is an arc-shaped surface, clamping grooves / convex grooves are pre-formed in the top surface and the side surface of the FPR prefabricated panel, and mortise and tenon joint structures correspondingly connected with the grooves / convex grooves are arranged on the bottom surface and the other side surface of the FPR prefabricated panel; the adjacent annular plates are connected with each other through the grooves / convex grooves and the mortise and tenon joint structures, and the adjacent longitudinal plates are connected with each other through the grooves / convex grooves and the mortise and tenon joint structures on the top surfaces and the bottom surfaces; the surface of the annular steel tool base is provided with an annular groove for a plate to be embedded. The construction efficiency is improved, the construction quality is guaranteed, the safety risk is reduced, meanwhile, the construction cost is saved, the engineering cost is reduced, the construction environment is friendly, and environmental protection and energy saving are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of assembled glass fiber reinforced plastic cylinders, and more particularly to an assembled glass fiber reinforced plastic chimney and a construction process. Background Art

[0002] Concrete chimneys are widely used in the power, chemical and other industries. Their inner walls are eroded by high temperature and corrosive flue gas for a long time, and are prone to corrosion, peeling and other problems, which affect the safe operation and service life of the chimney. In order to extend the service life of concrete chimneys, they usually need to be treated with anti-corrosion. At present, the use of fiberglass reinforced plastic (FRP) inner tube for corrosion protection of concrete chimneys is a more common method. FRP composite materials have excellent corrosion resistance and high plasticity, and have been widely used in various fields. In China, the technology of using FRP inner tubes to protect concrete chimneys from corrosion is relatively mature, and there are many successful cases.

[0003] However, the existing FRP inner tube anti-corrosion technology has many drawbacks in practical applications. First, the production of FRP inner tubes requires the construction of a temporary plant with an area of ​​about 400 square meters on the construction site. This not only takes up a lot of space, but also pollutes the environment due to open-air operations on site. During the production process, vertical or horizontal winding machines are usually used to process the FRP inner tube, and the winding process requires waiting for curing time. At the same time, hazardous chemicals such as resins and accelerators need to be stored on site, which increases the site requirements and the cost of professional supervision.

[0004] Secondly, the processed FRP inner tube needs to be clamped with steel hoops and demoulded, turned over and moved with the help of a truck crane. It takes about 2 days to process a section of FRP inner tube on average. The finished FRP inner tube needs to be stored on site, usually occupying 2,000 to 3,000 square meters of space. Due to the limitation of on-site space, the finished inner tube often needs to be stored in the open air, which is affected by wind and sun for a long time, which may cause the quality of the FRP inner tube to deteriorate.

[0005] In terms of installation, the installation process of FRP inner tube is mainly divided into two types: hanging type and free-standing type. Hanging installation is generally suitable for new chimney anti-corrosion projects. It is necessary to design the manhole door size larger than the FRP inner tube size during the design stage. The prefabricated FRP inner tube is transported into the chimney through the manhole door, and is lifted to the top of the chimney by multiple jacks and connected to the steel structure ring beam at the top. Each section of the inner tube needs to be connected with hand-laid FRP to increase strength and sealing. This connection process has high requirements, requires special equipment and multi-person collaboration, and has a long construction period.

[0006] Self-supporting installation is suitable for the anti-corrosion transformation of old chimneys. A lifting device needs to be installed on the top of the chimney. The installation and removal time is about 20 days, and there are high risks. The lifting device lifts the FRP inner tube stored on the ground to the top of the chimney, lowers it into the chimney from the smoke outlet at the top of the chimney, and places it on the pre-installed steel structure ring beam. The adjacent FRP inner tube sections are connected end to end through the quick installation joints set at the ends. The connection process includes hand paste of the inner wall connection seam, external glue injection, and steel clamp bolt connection and fixation to increase strength and sealing. This installation process needs to be repeated many times until all the inner tubes are installed. The lifting process is greatly affected by the weather. It is rainy in the south and windy in the north. It may be impossible to lift for several consecutive days. The construction risk is high, and it requires the cooperation of many people to complete, and the construction period is long.

[0007] In summary, the existing FRP inner tube anti-corrosion technology has many problems in production, transportation, storage and installation, resulting in long construction period, high cost and high risk. An improved technical solution is urgently needed to overcome the above disadvantages. Summary of the invention

[0008] In order to solve the above problems, the present invention provides an assembled fiberglass chimney and construction process, which solves many problems in traditional construction methods by prefabrication in the factory and rapid installation on site. The process has the advantages of high construction efficiency, reliable quality, high safety, environmental protection and energy saving, and has broad application prospects.

[0009] To achieve the above object, the present invention provides the following technical solutions, which mainly include:

[0010] A prefabricated FRP chimney comprises an FPR prefabricated plate and an annular steel tooling base; the FPR prefabricated plate is an annular tile-shaped plate, the axial inner side is an arc-shaped surface, the top surface and the side surfaces are preset with clamping grooves / convex grooves, and the bottom surface and the other side surface are provided with mortise and tenon structures corresponding to the grooves; adjacent annular plates are connected to each other through the grooves / convex grooves and the mortise and tenon structures, and adjacent longitudinal plates are connected to each other through the grooves and mortise and tenon structures on the top surface and the bottom surface; an annular groove for the plates to be embedded is provided on the surface of the annular steel tooling base.

[0011] In a specific embodiment, the annular steel tooling base is a steel structure, which is fixed to the concrete platform in the chimney by expansion bolts. The annular steel tooling base is annular as a whole, and a bolt fixing seat is provided on the inner side, which is fixed by bolts driven into the ground.

[0012] In a specific embodiment, the annular steel tooling base is a spliced ​​steel structure.

[0013] In a specific embodiment, the FPR prefabricated boards are connected axially, and the concave and convex grooves of the FPR prefabricated boards are connected in sequence until they are connected into a circle. Resin is applied along the connection seam on the inside and outside of the connection seam, and glass fiber cloth is applied.

[0014] In a specific embodiment, when the FPR prefabricated plate is spliced ​​up and down, it is connected through the concave and convex grooves on the top and bottom surfaces of the plate, and the lowest end of the spliced ​​steel cylinder is fixed on the annular steel tooling base.

[0015] A construction process for an assembled glass fiber reinforced plastic chimney comprises the following steps:

[0016] S1. Factory prefabrication: FRP panels are prefabricated in the factory according to the design requirements and transported to the construction site after quality inspection and testing;

[0017] S2. Install the base and support fixtures: Install a circular steel fixture base at the bottom of the chimney, build a height-adjustable support fixture on top of it, and calibrate it to a circular level to meet standard requirements;

[0018] S3. Install the steel suspension ring beam and lifting equipment: Install the steel suspension ring beam and lifting equipment on the top of the chimney and set the internal lifting points;

[0019] S4. Install the FRP prefabricated sheet: Use the lifting equipment to embed the lower end of the FRP prefabricated sheet into the annular groove of the annular steel tooling base, and splice the concave and convex grooves of the sheet in sequence to form a circular cross-section in an annular connection;

[0020] S5. Vertical joint treatment: polish and clean the inside and outside of the vertical joint, apply resin, apply fiberglass cloth, and wait for it to solidify;

[0021] S6. Install the internal annular reinforcement ribs: install the annular reinforcement ribs on the inner wall of the FRP inner tube through the bonding process, and continue the construction after it solidifies; at the same time, install the external reinforcement ribs on the outside;

[0022] S7. Lift the tooling and repeat the installation: lift the support tooling to the specified height, continue to install the next layer of FRP plates, and repeat the above steps until the designed height is reached;

[0023] S8. Install the anti-sway device: When the FRP inner tube reaches the predetermined height, install the anti-sway device to prevent the inner tube from shaking;

[0024] S9. Top capping treatment: install reinforcing ribs on the top of the FRP inner tube to fix and tighten it;

[0025] S10. Fixing and removal: Fix the top of the FRP inner tube to the steel suspension ring beam and remove the lifting equipment and tooling;

[0026] S11. Flue connection: Open a flue connection port at the bottom of the FRP inner tube and connect it to the flue system to complete the production and installation of the chimney.

[0027] In a specific embodiment, the longitudinally adjacent plates of the FRP plates are connected by concave and convex tongues and grooves on the top and bottom surfaces, and the bottom of the spliced ​​FRP inner tube is fixed on an annular steel tooling base, and the top is fixed on a steel suspension ring beam.

[0028] In a specific embodiment, the curing time of the vertical joint after treatment is determined according to the ambient temperature and the resin properties, so as to ensure that the strength and sealing of the joint meet the design requirements.

[0029] In a specific implementation, the installation position and number of the internal reinforcing ribs are determined according to the height and stress conditions of the FRP inner tube to improve the structural stability of the inner tube.

[0030] In a specific implementation, the hoisting equipment includes internal hoisting equipment and top hoisting equipment, which can meet the hoisting requirements of different heights and weights to ensure construction safety.

[0031] Compared with the prior art, this application has the following beneficial effects:

[0032] This prefabricated FRP chimney fabrication and installation process has the following main benefits:

[0033] Improve construction efficiency: Factory-prefabricated FRP panels are used, which only require quick assembly on site, simplifying the construction process and greatly shortening the construction period. This modular construction method enables the project to be completed faster.

[0034] Guaranteed construction quality: The standardized production environment in the factory ensures the quality consistency and reliability of FRP plates. Strict quality control and standardized production processes ensure that the products have higher quality assurance.

[0035] Reduce safety risks: The optimized construction process reduces the time of high-altitude operations and on-site production, and reduces the safety risks of construction workers. The use of dedicated lifting equipment and tooling ensures the safety of the construction process.

[0036] Save construction costs: Reduce on-site production and manpower input, reduce labor costs and time costs. Factory production reduces material waste, improves resource utilization, and thus reduces comprehensive construction costs.

[0037] Environmental protection and energy saving: The use of hazardous chemicals and waste materials on site are reduced during the construction process, reducing the risk of environmental pollution. Factory prefabrication reduces the energy consumption required for on-site processing, which is in line with the concept of green construction and sustainable development.

[0038] Superior structural performance: FRP material has the advantages of light weight, high strength and corrosion resistance, which prolongs the service life of the chimney. The design of internal reinforcement ribs and anti-sway device improves the structural stability and wind resistance of the inner tube.

[0039] Wide applicability: This process is suitable for the anti-corrosion renovation of old chimneys and the construction of new chimneys. It can be adjusted according to different engineering requirements and has broad application prospects.

[0040] Environmentally friendly construction: reduces the need to build temporary factories and store hazardous chemicals on site, lowers the requirements for the construction site environment, and reduces the impact on the surrounding environment and personnel.

[0041] High quality controllability: Prefabricated panels are produced in the factory and can undergo strict quality inspection, avoiding the unstable quality problems that may occur in on-site production and improving the overall quality level of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the overall structure of the modified chimney in Example 1 of the present invention.

[0044] Figure 2 It is a schematic diagram of the structure of the chimney and the glass fiber reinforced plastic cylinder after modification in the first embodiment of the present invention.

[0045] Figure 3 It is a schematic diagram of the structure of the annular steel tooling base in the first embodiment of the present invention.

[0046] Figure 4 It is a schematic diagram of the FRP plate structure in Example 1 of the present invention.

[0047] Figure 5 It is a schematic diagram of the axial connection structure of FRP plates in Example 1 of the present invention.

[0048] Figure 6 It is a schematic diagram of the longitudinal connection structure of FRP plates in Example 1 of the present invention.

[0049] Figure 7 It is a schematic diagram of the overall connection structure of the FRP plates in the first embodiment of the present invention.

[0050] In the figure: 100-FPR prefabricated plate; 200-steel tooling base; 101-groove / convex groove; 102-mortise and tenon structure; 300-concrete platform; 400-fixing ring; 500-anti-sway device; 600-flue; 103-fiberglass cloth; 700-bolt fixing position. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Example 1: Please refer to Figures 1 to 7 As shown:

[0053] The following is a detailed description of the manufacturing and installation process of the prefabricated fiberglass chimney of the present invention in conjunction with the accompanying drawings and specific embodiments. This embodiment is intended to further illustrate the technical solution of the present invention, to facilitate understanding and implementation by those skilled in the art, but does not limit the scope of protection of the present invention.

[0054] 1. Project Overview

[0055] This embodiment involves the anti-corrosion transformation of an old concrete chimney with a height of 210 meters and an inner diameter of 7.5 meters, using a prefabricated glass fiber reinforced plastic (FRP) inner tube structure. The FRP plates are prefabricated in the factory and quickly assembled on site to solve the problems of difficult construction, long construction period, environmental pollution and high safety risks in traditional construction methods.

[0056] 2. Main materials and equipment

[0057] FRP prefabricated panels:

[0058] Specifications: Annular tile-shaped plate, with an arc-shaped surface on the inner side of the axial direction, thickness of 10-30 mm, width of 3-5 meters, and length of 8-13 meters.

[0059] Structure: The top surface and the side surface are provided with snap-fitting grooves / convex grooves, and the bottom surface and the other side surface are provided with mortise and tenon structures corresponding to the grooves / convex grooves.

[0060] Classification: Divided into standard modules and non-standard modules to adapt to changes in the inner diameter of the chimney.

[0061] Annular steel tooling base:

[0062] Structure: Annular steel structure with annular grooves on the surface for FRP plates to fit into.

[0063] Fixing method: Firmly connected to the cement fixing platform inside the chimney through expansion bolts.

[0064] Support tooling:

[0065] Function: Provide external support for the installation of FRP plates to ensure the verticality and roundness of the plates.

[0066] Adjustability: The height and position can be adjusted according to construction needs.

[0067] Steel suspension ring beam:

[0068] Location: Installed on the top of the chimney as the upper support of the FRP inner tube and the fixing point for the lifting equipment.

[0069] Function: Provide structural support for hoisting and fixing FRP inner tube.

[0070] Lifting equipment:

[0071] Internal lifting equipment: installed inside the chimney to lift the supporting tooling and FRP panels.

[0072] Top lifting equipment: Installed on the steel suspension ring beam, used to lift FRP plates and other components.

[0073] Other Materials:

[0074] Winding yarn, resin, glass fiber cloth, polyamine resin curing agent.

[0075] 3. Construction Process

[0076] Factory prefabricated FRP panels:

[0077] Standardized production: FRP prefabricated panels are formed in one step in the factory using molds according to design requirements.

[0078] Quality inspection: Strictly test the size, thickness, surface quality, etc. of the plates to ensure they meet the standards.

[0079] Number identification: Number each plate to facilitate sequential assembly during on-site installation.

[0080] Site preparation:

[0081] Material transportation: Transport the qualified FRP plates and construction equipment to the construction site and store them properly.

[0082] Safety protection: Build safety protection facilities to ensure the safety of construction workers.

[0083] Install the steel circular tooling base:

[0084] Positioning and installation: Install the annular steel tooling base on the cement platform at the bottom of the chimney and adjust its levelness and roundness.

[0085] Fixed connection: Use expansion bolts and bolt fixings to firmly fix the base to the concrete platform inside the chimney.

[0086] Build the support tooling:

[0087] Installation location: Above the annular steel tooling base, build a supporting tooling according to the height requirements of the FRP plate.

[0088] Precise adjustment: Use measuring tools to correct the verticality and roundness of the support fixture to ensure compliance with national standards.

[0089] Install the steel suspension ring beam:

[0090] Top construction: Install a steel suspension ring beam at the top of the chimney to serve as a fixing point for lifting equipment.

[0091] Fixing method: Fix the ring beam to the chimney top structure by welding or high-strength bolts.

[0092] Install internal lifting equipment:

[0093] Hanging point setting: According to the construction plan, set up hanging points inside the chimney and install internal lifting equipment.

[0094] Functional inspection: Ensure that the lifting equipment operates normally and meets the construction load requirements.

[0095] Initial installation of FRP panels:

[0096] Lifting the first plate:

[0097] Use the top lifting equipment to lift the FRP standard plate numbered 1 to the installation location.

[0098] Align the bottom of the plate with the annular groove of the annular steel tooling base and insert it to fix it.

[0099] The inner side of the upper part of the plate rests against the outer side of the supporting tooling to ensure verticality.

[0100] Circumferential splicing plate:

[0101] Lift the subsequent FRP plates in sequence, and use the tenon structure and the clamping grooves on the side to connect the adjacent plates. Splice them one by one until a complete annular section is formed.

[0102] Vertical joint treatment:

[0103] Inside and outside cleaning: Grind and remove dust and impurities on the inside and outside of the vertical joints.

[0104] Apply resin: Apply resin evenly on the joints to improve bonding performance.

[0105] Apply reinforcement material: Apply fiberglass cloth on the joints to enhance strength and sealing.

[0106] Curing: Wait until the resin and reinforcement materials are fully cured to ensure that the joints are strong.

[0107] Install the internal reinforcement:

[0108] Positioning and installation: Bond the internal reinforcement ribs to the inner wall of the FRP inner tube according to the design requirements.

[0109] Bonding process: Use special adhesive to ensure that the reinforcement is tightly bonded to the inner wall.

[0110] Curing time: Wait for the bonding area to fully cure to improve the structural strength of the inner tube.

[0111] Lift the support tooling and continue installation:

[0112] Lifting tooling: Use internal lifting equipment to lift the supporting tooling to the next installation height.

[0113] Fixed Adjustment: Adjust the horizontal and vertical position of the tooling at the new height.

[0114] Install the next layer of FRP sheet:

[0115] Repeat step 7 to install the next layer of FRP sheet.

[0116] The longitudinally adjacent boards are connected by the concave and convex tongue and groove on the top and bottom surfaces of the boards.

[0117] Carry out vertical joint treatment and curing.

[0118] Repeat the installation process:

[0119] Installation layer by layer: Repeat the steps of lifting the tooling and installing the FRP panels, working upwards layer by layer.

[0120] Regular inspection: After each layer is completed, check the verticality, roundness and joint quality of the board.

[0121] Install the anti-sway device:

[0122] Installation location: When the height of the FRP inner tube reaches about 30 meters, install the anti-sway device inside the chimney. Fixing method: Connect the anti-sway device between the FRP inner tube and the inner wall of the chimney to limit the shaking of the inner tube.

[0123] Function: Improve the safety and structural stability of high-altitude construction.

[0124] Top segment processing:

[0125] Install the last section of FRP sheet: Follow the previous steps to install the last section of the top sheet.

[0126] Top capping treatment: Install reinforcing ribs on the top of the FRP inner tube to fix it;

[0127] Inner and outer wall treatment: Apply resin glue to the inner and outer walls of the FRP inner tube at the same time, and apply glass fiber cloth to improve the joint strength.

[0128] Fixing the FRP inner tube:

[0129] Top fixation: Fix the top of the FRP inner tube to the steel suspension ring beam through the preset installation point.

[0130] Bottom fixation: The bottom of the FRP inner tube is fixed on the annular steel tooling base to form a complete structural system.

[0131] Removal of construction equipment:

[0132] Removal of lifting equipment: After ensuring that the FRP inner tube is firmly fixed, remove the internal lifting equipment and supporting tooling.

[0133] Clean up the site: Clean up the construction site to ensure there is no debris left.

[0134] Flue connection:

[0135] Opening treatment: A flue connection opening is opened at the bottom of the FRP inner tube according to the designed position.

[0136] Connection installation: Connect the opening of the FRP chimney to the flue system to ensure the normal discharge of flue gas.

[0137] Construction completion and acceptance:

[0138] Comprehensive inspection: Conduct a comprehensive inspection on the verticality, roundness, joint quality, anti-corrosion layer, etc. of the FRP inner tube.

[0139] Quality acceptance: Confirm that the construction quality meets the design requirements and relevant standards, and go through the acceptance procedures.

[0140] Put into use: After passing the acceptance inspection, the chimney can be put into normal use.

[0141] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0142] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembled fiberglass chimney, characterized in that: It comprises an FPR prefabricated plate and an annular steel tooling base; the FPR prefabricated plate is an annular tile-shaped plate, the axial inner side is an arc-shaped surface, the top surface and the side surfaces are preset with clamping grooves / convex grooves, and the bottom surface and the other side surface are provided with mortise and tenon structures corresponding to the grooves; the annular adjacent plates are connected to each other through the grooves / convex grooves and the mortise and tenon structures, and the longitudinally adjacent plates are connected to each other through the grooves and mortise and tenon structures on the top surface and the bottom surface; the surface of the annular steel tooling base is provided with an annular groove for the plates to be embedded.

2. The assembled fiberglass chimney according to claim 1, characterized in that: The annular steel tooling base is a steel structure, which is fixed to the concrete platform in the chimney. The annular steel tooling base is annular as a whole, and a bolt fixing seat is provided on the inner side, which is fixed by driving bolts into the ground.

3. The assembled fiberglass chimney according to claim 2, characterized in that: The annular steel tooling base is a spliced ​​steel structure.

4. The assembled fiberglass chimney according to claim 1, characterized in that: The FPR prefabricated panels are connected axially, and the concave and convex grooves of the FPR prefabricated panels are connected in sequence until they are connected to a circle. Resin is applied along the connection seam on the inner and outer sides of the connection seam, and glass fiber cloth is applied.

5. The assembled fiberglass chimney according to claim 4, characterized in that: When the FPR prefabricated plate is spliced ​​up and down, it is connected through the concave-convex grooves on the top and bottom surfaces of the plate, and the lowest end of the spliced ​​steel cylinder is fixed on the annular steel tooling base.

6. A construction process using the assembled fiberglass chimney according to any one of claims 1 to 5, characterized in that: The steps include: S1. Factory prefabrication: FRP panels are prefabricated in the factory according to the design requirements and transported to the construction site after quality inspection; S2. Install the base and support fixtures: Install a circular steel fixture base at the bottom of the chimney, build a height-adjustable support fixture on top of it, and calibrate it to a circular level to meet standard requirements; S3. Install the steel suspension ring beam and lifting equipment: Install the steel suspension ring beam and lifting equipment on the top of the chimney and set the internal lifting points; S4. Install the FRP prefabricated sheet: Use the lifting equipment to embed the lower end of the FRP prefabricated sheet into the annular groove of the annular steel tooling base, and splice the concave and convex grooves of the sheet in sequence to form a circular cross-section in an annular connection; S5. Vertical joint treatment: polish and clean the inside and outside of the vertical joint, apply resin, apply fiberglass cloth, and wait for it to solidify; S6. Install the internal annular reinforcement ribs: install the annular reinforcement ribs on the inner wall of the FRP inner tube through the bonding process, and continue the construction after it solidifies; at the same time, install the external reinforcement ribs on the outside; S7. Lift the tooling and repeat the installation: lift the support tooling to the specified height, continue to install the next layer of FRP plates, and repeat the above steps until the designed height is reached; S8. Install the anti-sway device: When the FRP inner tube reaches the predetermined height, install the anti-sway device to prevent the inner tube from shaking; S9. Top capping treatment: install reinforcing ribs on the top of the FRP inner tube to fix and tighten it; S10. Fixing and removal: Fix the top of the FRP inner tube to the steel suspension ring beam and remove the lifting equipment and tooling; S11. Flue connection: Open a flue connection port at the bottom of the FRP inner tube and connect it to the flue system to complete the production and installation of the chimney.

7. The construction process according to claim 6, characterized in that: The longitudinally adjacent plates of the FRP plates are connected by the concave-convex tongue and groove on the top and bottom surfaces. The bottom of the spliced ​​FRP inner tube is fixed on the annular steel tooling base, and the top is fixed on the steel suspension ring beam.

8. The construction process according to claim 6 or 7, characterized in that: The curing time of the vertical joint after treatment is determined according to the ambient temperature and the resin properties, ensuring that the strength and sealing of the joint meet the design requirements.

9. The construction process according to claim 6, characterized in that: The installation position and quantity of the internal reinforcing ribs are determined according to the height and stress conditions of the FRP inner tube to improve the structural stability of the inner tube.

10. The construction process according to claim 6, characterized in that: The hoisting equipment includes internal hoisting equipment and top hoisting equipment, which can meet the hoisting requirements of different heights and weights to ensure construction safety.

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