A method for installing a large boiler

Abstract

The present invention provides a large boiler installation method. In the production stage, the boiler is divided into a base module, a convection heating module, and four or six radiation heating modules. The side shape of each radiation heating module is in the shape of a "7" and a plurality of connecting steel plates with through holes are welded on the top. In the installation stage, the four or six radiation heating modules are respectively hoisted to the base module with the help of a plurality of lifting devices, and the four or six radiation heating modules are made to be close together and always kept in an upright state, ensuring that the through holes of the connecting steel plates on adjacent radiation heating modules are aligned with each other, and then workers use bolts to pass through the through holes of the connecting steel plates to pull and fix all the radiation heating modules to each other, and then the position and angle of each radiation heating module are fine-tuned, and then a plurality of reinforcing steel plates are welded at intervals on the steel frames of every two adjacent radiation heating modules for reinforcement and shaping, thereby improving the installation efficiency while ensuring the installation effect, thereby greatly saving the installation cost.

Description

Technical Field

[0001] The invention relates to the field of boilers, in particular to a large boiler installation method. Background Art

[0002] In the existing technology, many companies use large boilers for production, but the installation of large boilers is difficult and time-consuming. Therefore, someone invented a modular boiler. The manufacturer divides the boiler into multiple independent modules in advance, and then transports the boiler modules to the user's installation site for assembly. Compared with traditional boilers, this modular boiler installation method has higher flexibility and convenience, and the installation time can be shortened a lot. However, since the size of a single module is large, this brings new challenges to the installation. It is necessary to consider not only how to position it, but also how to fine-tune it later.

[0003] The installation methods of existing large modular boilers usually include: 1) module handling, using a forklift or other handling equipment to unload the boiler module from the transport vehicle and carefully transport it to the installation location; 2) lifting, using a crane to lift the module to the predetermined location, paying attention to safety during lifting to avoid module tilting or collision; 3) module connection, splicing each boiler module according to design requirements to ensure the sealing and stability of the connection; 4) pipeline connection, according to the design drawings, connecting the boiler with water supply, steam, exhaust and fuel pipelines to ensure that each connection is well sealed. Summary of the invention

[0004] The object of the present invention is to provide a modular large boiler installation method, which can improve the installation efficiency and ensure the installation effect.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a large boiler installation method, comprising the following steps: 1) During the production stage, the boiler is divided into multiple modules for production. The grate and the front and rear arches are assembled into a base module. The convection heating surface is assembled into a convection heating module through a steel frame. The radiation heating surface is assembled into four or six radiation heating modules through a steel frame. Multiple connecting steel plates with through holes are welded on the top of the steel frame of each radiation heating module. The side shape of each radiation heating module is in the shape of a "7"; 2) Loading the multiple modules in step 1) onto a truck and transporting them to the installation site; 3) Fix the base module on the ground; 4) Use lifting equipment to lift the convection heating module onto the base module for installation and fixation; 5) Use multiple lifting devices to hoist four or six radiant heating modules onto the base module respectively, and make the four or six radiant heating modules close together. Ensure that the through-holes of the connecting steel plates on adjacent radiant heating modules are aligned with each other. It is not until the worker passes bolts through the through-holes of the connecting steel plates to fix all the radiant heating modules to each other by pulling that the lifting devices can be released. 6) Fine-tune the position and angle of each radiant heating module according to the installation drawing. On the premise of ensuring the accurate positioning and tight fit of each radiant heating module, weld multiple reinforcing steel plates at intervals on the steel frames of every two adjacent radiant heating modules for reinforcement and shaping.

[0006] In one embodiment, connecting steel plates are also provided at the top of the steel frame of the convective heating module; the radiant heating surface is fabricated and assembled into four radiant heating modules through the steel frame, namely the left front module, the right front module, the left rear module, and the right rear module; in step 5), first use the lifting device to hoist the left rear module and the right rear module onto the base module and close to the convective heating module, ensure that the through-holes of the connecting steel plates of the left rear module and the right rear module are aligned with the through-holes of the connecting steel plates of the convective heating module, and fix the three together by passing bolts through the through-holes of the connecting steel plates. Then use the lifting device to hoist the left front module and the right front module onto the base module and close to the left rear module and the right rear module, ensure that the through-holes of the connecting steel plates of the left front module, the right front module, the left rear module, and the right rear module are aligned with each other, and fix the four together by passing bolts through the through-holes of the connecting steel plates to form a "field" shape.

[0007] Preferably, when When the connecting steel plate is set at the corner, its shape is L-shaped plate .

[0008] Preferably, both the radiant heating surface and the convective heating surface are membrane walls.

[0009] In step 6), multiple reinforcing steel plates are welded at intervals on the top and side of the steel frames of every two adjacent radiant heating modules for reinforcement and shaping.

[0010] The present invention divides the boiler into a base module, a convection heating module, and four or six radiation heating modules. Since the side shape of each radiation heating module is in the shape of a "7", this shape is convenient for stacking and transporting multiple radiation heating modules, but they cannot be placed upright separately during installation. It is necessary to use multiple lifting equipment to lift the four or six radiation heating modules to the base module respectively, and the four or six radiation heating modules must be closely attached to each other and always kept in an upright state. Therefore, this has become a major difficulty in the installation of the entire boiler. However, since the present invention specifically welds multiple connecting steel plates with through holes on the top of the steel frame of each radiation heating module At this time, it is only necessary to use the lifting equipment to align the through holes of the connecting steel plates on the adjacent radiation heating modules, and then let the workers use bolts to pass through the through holes of the connecting steel plates to pull and fix all the radiation heating modules to each other. In this way, multiple radiation heating modules are initially positioned from the top, and there is no need to use multiple lifting equipment for a long time to maintain stability. It is also conducive to the subsequent fine-tuning of the position and angle of each radiation heating module. On the premise of ensuring that each radiation heating module is accurately positioned and compactly matched, multiple reinforcing steel plates are welded on the steel frame of each two adjacent radiation heating modules at intervals for reinforcement and shaping, thereby completing the assembly of each module of the boiler. Therefore, the installation method provided by the present invention divides the boiler into modules reasonably and optimizes the shape and structure of the radiation heating module, so that each module is not only convenient for transportation, but also conducive to installation, and improves the installation efficiency while ensuring the installation effect, thereby greatly saving the installation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of a large boiler in an embodiment of the present invention; Figure 2 is a schematic diagram of the overall structure of the radiation heating surface in an embodiment of the present invention; Figure 3 for Figure 1 A schematic diagram of a top view structure; Figure 4 for Figure 1 AA line cross-sectional structural diagram; Figure 5 for Figure 1 BB line cross-sectional structure diagram; Figure 6 for Figure 1 Schematic diagram of the CC line cross-sectional structure; The accompanying drawings are marked as follows: 10. Grate; 20. Front arch; 30. Rear arch; 40. Convection heating surface; 50. Radiation heating surface; 51. Left front module; 52. Right front module; 53. Left rear module; 54. Right rear module; 55. Connecting steel plate; 56. Reinforcing steel plate. DETAILED DESCRIPTION

[0012] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0013] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] like Figure 1 A large boiler shown in the figure comprises a grate 10, a front arch 20, a rear arch 30, a convection heating surface 40, and a radiation heating surface 50, wherein the convection heating surface 40 and the radiation heating surface 50 are both membrane walls. This embodiment provides an installation method for the large boiler, comprising the following steps: 1) During the production stage, the boiler is divided into multiple modules for production. The grate 10, the front arch 20, and the rear arch 30 are combined together to form a base module. The convection heating surface 40 is assembled into a convection heating module through a steel frame. The radiation heating surface 50 is assembled into four or six radiation heating modules through a steel frame according to different sizes. Figure 2 As shown, this embodiment is made into four radiation heating modules, namely a left front module 51, a right front module 52, a left rear module 53, and a right rear module 54. The side shape of each radiation heating module is in the shape of a "7", and a connecting steel plate 55 is welded on the top of the steel frame of each radiation heating module and the top of the steel frame of the convection heating module; 2) Loading the multiple modules in step 1) onto a truck and transporting them to the installation site; 3) Fix the base module on the ground; 4) Use lifting equipment to lift the convection heating module onto the base module for installation and fixation; 5) Use multiple lifting devices to lift the four radiation heating modules onto the base module respectively, and make the four radiation heating modules close together, ensuring that the through holes of the connecting steel plates 55 on adjacent radiation heating modules are aligned with each other. The lifting devices can be released only after the workers use bolts to pass through the through holes of the connecting steel plates 55 to pull and fix all the radiation heating modules together; 6) Fine-tune the position and angle of each radiation heating module according to the installation drawing. On the premise of ensuring that each radiation heating module is accurately positioned and compactly matched, weld multiple reinforcing steel plates 56 at intervals on the top and side of the steel frame of every two adjacent radiation heating modules for reinforcement and shaping.

[0015] Specifically, in step 5), first use a lifting device to hoist the left rear module 53 and the right rear module 54 onto the base module and close to the convective heating module, ensuring that the through holes of the connecting steel plates 55 of the left rear module 53 and the right rear module 54 are aligned with the through holes of the connecting steel plates of the convective heating module, and use bolts to pass through the through holes of the connecting steel plates 55 to fix the three together. Then use a lifting device to hoist the left front module 51 and the right front module 52 onto the base module and close to the left rear module 53 and the right rear module 54, ensuring that the through holes of the connecting steel plates 55 of the left front module 51, the right front module 52, the left rear module 53, and the right rear module 54 are aligned with each other, and use bolts to pass through the through holes of the connecting steel plates 55 to fix the four together to form a "field" shape. When When the connecting steel plate 55 is arranged at the corner position, its shape is an L-shaped plate. .

[0016] The present invention divides the boiler into a base module, a convective heating module, and four or six radiative heating modules. Since the side shape of each radiative heating module is in the shape of a "7", this shape is convenient for stacking and transporting multiple radiative heating modules, but it cannot be erected alone during installation. It is necessary to use multiple lifting devices to hoist the four or six radiative heating modules onto the base module respectively, and make the four or six radiative heating modules close to each other and always remain in an erected state. Therefore, this has also become a major difficulty in the installation of the entire boiler. However, since the present invention specifically welds multiple connecting steel plates with through holes on the top of the steel frame of each radiative heating module, at this time, only need to use a lifting device to align the through holes of the connecting steel plates on adjacent radiative heating modules with each other, and then let the workers use bolts to pass through the through holes of the connecting steel plates to pull and fix all the radiative heating modules to each other, so as to initially position multiple radiative heating modules from the top, and there is no need to rely on multiple lifting devices for a long time to maintain stability, and it is also beneficial to fine-tune the position and angle of each radiative heating module subsequently. On the premise of ensuring that the position of each radiative heating module is accurate and the cooperation is compact, weld multiple reinforcing steel plates at intervals on the steel frames of every two adjacent radiative heating modules for reinforcement and shaping, so as to complete the assembly of each module of the boiler. Therefore, the installation method provided by the present invention divides the boiler into modules reasonably, and optimizes the shape and structure of the radiative heating modules, making each module not only convenient for transportation but also beneficial for installation, realizing the improvement of installation efficiency while ensuring the installation effect, thus greatly saving the installation cost.

[0017] In order to make it easier for those of ordinary skill in the art to understand the improvements of the present invention over the prior art, some of the drawings and descriptions of the present invention have been simplified, and the above embodiments are the preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A large boiler installation method, characterized in that: It includes the following steps: 1) During the production stage, the boiler is divided into multiple modules for fabrication. The grate (10), front arch (20), and rear arch (30) are fabricated and assembled into a base module. The convective heating surface (40) is fabricated and assembled into a convective heating module through a steel frame. The radiant heating surface (50) is fabricated and assembled into four or six radiant heating modules through a steel frame, and multiple connecting steel plates (55) with through-holes are welded to the top of the steel frame of each radiant heating module. The side shape of each radiant heating module is in the shape of a "7". 2) Load the multiple modules in step 1) onto a vehicle and transport them to the installation site. 3) Fix and install the base module on the ground. 4) Use a lifting device to hoist the convective heating module onto the base module for installation and fixation. 5) Use multiple lifting devices to hoist four or six radiant heating modules onto the base module respectively, and make the four or six radiant heating modules close and fit together. Ensure that the through-holes of the connecting steel plates (55) on adjacent radiant heating modules are aligned with each other. Only after the worker passes bolts through the through-holes of the connecting steel plates (55) to fix all the radiant heating modules to each other can the lifting device be released. 6) Fine-tune the position and angle of each radiant heating module according to the installation drawing. On the premise of ensuring that the positioning of each radiant heating module is accurate and the fit is compact, then weld multiple reinforcing steel plates (56) at intervals on the steel frames of every two adjacent radiant heating modules for reinforcement and shaping.

2. The large boiler installation method according to claim 1, characterized in that: The top of the steel frame of the convective heating module is also provided with a connecting steel plate (55); the radiant heating surface (50) is fabricated and assembled into four radiant heating modules through a steel frame, namely the left front module (51), right front module (52), left rear module (53), and right rear module (54). In step 5), first use a lifting device to hoist the left rear module (53) and right rear module (54) onto the base module and close to the convective heating module. Ensure that the through-holes of the connecting steel plates (55) of the left rear module (53) and right rear module (54) are both aligned with the through-holes of the connecting steel plate (55) of the convective heating module, and pass bolts through the through-holes of the connecting steel plate (55) to fix the three together. Then use a lifting device to hoist the left front module (51) and right front module (52) onto the base module and close to the left rear module (53) and right rear module (54). Ensure that the through-holes of the connecting steel plates (55) of the left front module (51), right front module (52), left rear module (53), and right rear module (54) are aligned with each other, and pass bolts through the through-holes of the connecting steel plate (55) to fix the four together to form a "field" shape.

3. The large boiler installation method according to claim 3 is characterized in that: When the connecting steel plates (55) on the steel frames of the four radiant heating modules are arranged at the corner positions, their shape is an L-shaped plate.

4. The large boiler installation method according to claim 1, characterized in that: Both the radiant heating surface (50) and the convective heating surface (40) are membrane walls.

5. The large boiler installation method according to claim 1, characterized in that: In step 6), multiple reinforcing steel plates (56) are welded at intervals on the top and side of the steel frames of every two adjacent radiant heating modules for reinforcement and shaping.

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