Fabricated reverse osmosis module stacking frame construction method and stacking frame

Abstract

The invention relates to the technical field of reverse osmosis module stack frame design, and discloses an assembly type reverse osmosis module stack frame construction method and a stack frame, and the method comprises the following steps: S10, separately and independently assembling each layer of support frame at a construction site, and combining each part by using a fastener in the assembly process without welding construction at the site; s20, a crane or a travelling crane is used for assembling all the layers of supporting frames in a reversed sequence to form a stacking frame, the multiple supporting frames in the stacking frame are sequentially distributed in the vertical direction, and every two adjacent supporting frames are connected through an interlayer assembly without welding; and S30, the stacking frame is hoisted to the upper surface of the installation foundation, and the stacking frame is fixed to the installation foundation. The construction method has the beneficial effects that modular installation and reverse assembly forming are adopted, the mechanical efficiency, the assembly precision and the like are improved compared with those of an original construction method, meanwhile, on-site welding construction operation is avoided, and the construction period can be shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reverse osmosis module stack rack design, in particular to a kind of assembled reverse osmosis module stack rack construction method and stack rack. BACKGROUND

[0002] Current mainstream technology for large-scale seawater desalination is reverse osmosis, distillation (multi-stage flash distillation, multi-effect distillation) and other technologies. Currently, due to factors such as investment cost, energy consumption and construction period, the application scale of reverse osmosis seawater desalination technology is increasing. During the construction process of reverse osmosis, reverse osmosis membrane elements and pressure vessels need to be arranged on the reverse osmosis stack of steel structure. The on-site construction workload is large, and the installation quality requirement is high. With the increasing scale of water treatment plants, the required reverse osmosis module is gradually becoming large-scale, and a large-volume stack is needed to install the reverse osmosis membrane group. Not only is the land area large, but also the existing module stack is difficult to transport and install on site due to its large size. The original stack structure has not adapted to the requirements of social and economic progress. Therefore, it is urgent to design a modular integrated product to effectively reduce the construction difficulty, shorten the construction period and improve the market competitiveness. SUMMARY

[0003] The present application aims to provide an assembled reverse osmosis module stack construction method to solve the problems of the existing module stack mentioned in the background technology, such as difficulty in transportation and on-site installation due to its large size.

[0004] The present application also provides an assembled reverse osmosis module stack to solve the problems of the existing reverse osmosis module stack, such as large land area, transportation and installation difficulty.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: An assembled reverse osmosis module stack construction method, comprising: S10, independently assembling each layer of support frame at the construction site, and fastening each component during the assembly process without welding construction on site; S20, using a crane or a travelling crane to assemble the support frames in reverse order to form a stack, wherein the plurality of support frames in the stack are distributed in vertical direction, and the adjacent two support frames are connected by an interlayer assembly without welding; the reverse order assembly means that one support frame is stacked on another support frame for connection, and then the whole is stacked on another support frame for connection until the required number of layers of the stack is reached; S30, hoist the stack to the upper surface of the installation foundation, and fix the stack on the installation foundation. In the present application, modular design is adopted, the stack is composed of a plurality of support frames, each support frame contains parts manufactured in the factory to ensure manufacturing accuracy, and the parts are transported to the site after processing, and are independently assembled into a plurality of support frames on site. The stack adopts a modular integrated product, and is assembled in reverse order to effectively reduce the construction difficulty, shorten the construction period, improve the market competitiveness, and avoid on-site welding operation by using fasteners and interlayer assemblies during assembly. There is no pollution of the workshop by a large number of welding products, and the cleanliness is controllable.

[0006] Further, in S10, assembling the support frame includes the following process: S11, temporarily prevent the overturning support from being made on site; S12, assembling the support frame by relying on the temporary anti-overturning support; S13, after the support frame is assembled and inspected, the temporary anti-overturning support is removed. Through the above setting, the inclination or even overturning of the support frame during assembly is avoided, and the construction and installation are effectively guaranteed.

[0007] Further, S20 includes: S21, checking the strength of the steel wire rope before hoisting; S22, selecting one support frame as a lower support frame, and placing the lower support frame on the horizontal base surface; S23, making a protection frame on site to stably connect the lower support frame and the horizontal base surface through the protection frame; S24, hoisting another support frame and stacking it on the lower support frame, connecting the two layers of support frames through the interlayer assembly, and maintaining the hoisting state during the connection process; S25, removing the protection frame, hoisting the connected support frame away, and using the connected support frame as the upper support frame for the next hoisting; S26, repeating the processes of S22-S25 until the required number of layers of the stack is reached. In the assembly process of the stack of the present application, the support frames are assembled in reverse order, the construction height is uniform, and the mechanical efficiency and assembly accuracy can be effectively improved.

[0008] Further, S30 also includes that if the stack is not installed in time, a temporary support tool should be made to store the assembled stack, and the stack should be stored on the hardened horizontal base surface.

[0009] Further, in S10, the quality of each part is checked before the support frame is installed. When the deformation or defect of the part exceeds the allowable deviation, it should be handled in time to ensure the subsequent assembly progress and the safety of the stack.

[0010] Furthermore, in S20, each support frame needs to be re-inspected first. Only after passing the re-inspection can the stacking rack be assembled. This setting improves the safety and reliability of the stacking rack installation.

[0011] An assembled reverse osmosis module stack rack includes an interlayer assembly and several support frames arranged sequentially in a vertical direction, wherein each pair of adjacent support frames is detachably connected by the interlayer assembly. The support frame includes an upper frame, a lower frame, and a side column assembly located between the upper frame and the lower frame. The upper frame and the lower frame are arranged vertically opposite each other, and there is a first gap between the upper frame and the lower frame. The side column assembly includes multiple side columns, and the two ends of the multiple side columns are detachably connected to the upper frame and the lower frame, respectively. The first gap is used to accommodate the reverse osmosis module, and the length direction of the reverse osmosis module is distributed along a first horizontal direction, and the width direction of the reverse osmosis module is distributed along a second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. The interlayer assembly includes a first connector and a second connector. The first connector is located on the lower frame of the upper support frame among two adjacent support frames, and the second connector is located on the upper frame of the lower support frame among two adjacent support frames. The first connector and the second connector are connected to link the two adjacent support frames together. With this configuration, the prefabricated reverse osmosis module stack extends vertically, requires a small footprint, and is scalable, allowing the number of layers and size required for assembly to be determined based on site conditions.

[0012] Furthermore, the upper frame includes two first crossbeams and two second crossbeams; the two first crossbeams are parallel to a first horizontal direction and arranged opposite to each other, and the two second crossbeams are parallel to a second horizontal direction and arranged opposite to each other. The first crossbeams and the adjacent second crossbeams are detachably connected to form the upper frame. The lower frame includes two third crossbeams and two fourth crossbeams. The two third crossbeams are vertically aligned with the two first crossbeams, and the two fourth crossbeams are vertically aligned with the two second crossbeams. The third crossbeams are detachably connected to adjacent fourth crossbeams to form the lower frame. This design, along with the detachable upper and lower frames, allows all components in the stack to be disassembled. Numerous connecting components enable rapid assembly of the parts on-site, effectively improving stacking efficiency. It also facilitates maintenance and replacement of damaged parts during use, significantly reducing costs and resulting in good socio-economic benefits.

[0013] Furthermore, there are four side columns, which are respectively set at the four corners of the upper frame and the lower frame. The support frame also includes a support structure, and the two ends of the support structure are detachably connected to the first crossbeam and the third crossbeam that are directly opposite each other.

[0014] Furthermore, the support structure includes columns, the top of which is detachably connected to the midpoint of the first crossbeam, and the bottom of which is detachably connected to the midpoint of the third crossbeam. This support structure improves the stability of the support frame.

[0015] Furthermore, the support structure also includes diagonal braces, which are detachably installed between the upright and side columns on the same side. The diagonal braces further enhance the stability of the support frame.

[0016] Furthermore, the top and / or bottom of the side column is provided with a first fixing plate facing the upright column, and the upright column is provided with a second fixing plate corresponding to the first fixing plate. The two ends of the diagonal brace are bolted to the first fixing plate and the second fixing plate, respectively. With this arrangement, the diagonal brace is connected to the upright column and the side column through the fixing plates, which is simple in structure and convenient for construction.

[0017] Furthermore, the diagonal brace is one of angle steel, square steel, or channel steel. This design facilitates material selection and reduces costs.

[0018] Furthermore, the support frame also includes a receiving frame, which is disposed in the first interval and is used to fix the reverse osmosis module.

[0019] Furthermore, the receiving frame includes a receiving rod and a limiting member; the receiving rod is parallel to the second horizontal direction, and the two ends of the receiving rod are detachably connected to the corresponding side columns; the limiting member is evenly distributed on the receiving rod along the second horizontal direction for fixing the reverse osmosis module.

[0020] Furthermore, the limiting component includes a U-shaped positioning ring, the open end of which is detachably connected to the receiving rod to fix the reverse osmosis membrane tube within the space defined by the U-shaped positioning ring and the receiving rod.

[0021] Furthermore, it also includes a buffer pad, which is evenly distributed on the upper surface of the receiving rod and corresponds one-to-one with the limiting member.

[0022] Furthermore, there are multiple supporting rods, which are distributed vertically at intervals within the first interval of the support frame.

[0023] The present invention has the following advantages over the prior art: 1. In the prefabricated reverse osmosis module stacking construction method of the present invention, the components of the stacking frame are manufactured in the factory to ensure manufacturing precision. After processing, they are transported to the site and assembled into support frame modules on-site. The modules are then assembled in reverse order, improving mechanical efficiency and assembly precision compared to the original construction method. This method also avoids on-site welding, helping to shorten the construction cycle. During the reverse assembly process, the construction height is uniform, eliminating the need for operators to climb scaffolding, making the operation relatively safe and reducing construction difficulty. The method also verifies the strength of the hoisting wire ropes to ensure safe hoisting operations. When connecting the stacking frame to the installation foundation, operators work directly on the ground, changing the high-altitude work of the original method to ground-based work. This facilitates construction operations, improves the working environment, reduces construction safety risks, and enhances the safety and reliability of the frame installation.

[0024] 2. The prefabricated reverse osmosis module stacking rack of the present invention comprises several support frames arranged sequentially in a vertical direction. Each pair of adjacent support frames is detachably connected via interlayer components, allowing the stacking rack to extend vertically, requiring a small floor space and possessing scalability. The number of layers and scale required for assembly can be determined according to site conditions. The support frames of the prefabricated reverse osmosis module stacking rack of the present invention include an upper frame, a lower frame, and side columns, wherein the upper and lower frames are detachably connected via side columns. A first connecting member is provided on the lower frame of the upper support frame among two adjacent support frames, and a second connecting member is provided on the upper frame of the lower support frame among two adjacent support frames. The first connecting member and the second connecting member connect the two adjacent support frames together. In other words, the upper frame, lower frame, side columns, and other components of each support frame in the present invention are all detachable, facilitating transportation. After being assembled into a support frame on site, a reverse assembly can be performed to form an overall stacking rack, reducing on-site construction costs and improving product quality.

[0025] 3. The prefabricated reverse osmosis module stack rack of the present invention has an upper frame including a detachable first crossbeam and a second crossbeam, and a lower frame including a detachable third crossbeam and a fourth crossbeam. Thus, all components in the stack rack can be disassembled and manufactured in the factory. On-site, numerous connecting components are used to quickly connect the various parts into a whole, realizing modular assembly, effectively improving the stack rack installation efficiency, facilitating the inspection and replacement of damaged parts during use, effectively reducing costs, and having good social and economic benefits. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the assembled reverse osmosis module stack rack in an embodiment of the present invention; Figure 2 In the embodiments of the present invention, Figure 1 Front view of the middle support frames separated from each other; Figure 3 In the embodiments of the present invention,Figure 1 Side view of the support frames separated from each other; Figure 4 This is a schematic diagram of the connection between the diagonal brace and the side column in the assembled reverse osmosis module stack rack of an embodiment of the present invention.

[0027] In the diagram: 1. Support frame; 2. Upper frame; 3. Lower frame; 4. Side column; 5. Reverse osmosis module; 6. First connector; 7. Second connector; 8. First crossbeam; 9. Second crossbeam; 10. Third crossbeam; 11. Fourth crossbeam; 12. Column; 13. Diagonal brace; 14. First fixing plate; 15. Support rod; 16. Limiting component; 17. Buffer pad. Detailed Implementation

[0028] 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.

[0029] It should be noted that in the description of this invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.

[0032] Example: The original installation procedure for the reverse osmosis module rack involved first welding and fixing the four corner columns and beams of the rack on-site, and then welding and installing each layer of beams and supporting angle steel components layer by layer. This process required on-site cutting and welding of most rack components, resulting in a large amount of welding work and necessitating the erection of scaffolding for workers to climb and weld layer by layer. Because the installation of reverse osmosis membrane housings and elements requires a clean and dust-free workshop, the particulate matter inside the membrane housing must be ≤5mg / m³. 3The welding process generates a large amount of welding products and dust, so the membrane elements can only be installed after all the on-site stacking frames have been welded, which affects the construction efficiency.

[0033] A method for constructing a prefabricated reverse osmosis module stacking system includes: S10. Assemble each layer of the support frame independently on the construction site. During assembly, fasteners are used to hold the components together; no welding is required on-site. Fasteners include common bolts and nuts. Components are manufactured in the factory and then transported to the site. Before on-site assembly begins, the quality of each component must be inspected. If any component is deformed or has defects exceeding allowable deviations, it should be addressed promptly to ensure subsequent assembly progress and the safety of the stacked frame. The assembly of each support frame is carried out on a horizontal foundation surface, specifically including the following steps: S11. Fabricate temporary anti-overturning supports on-site; S12. Assemble the support frame using the temporary anti-overturning supports, i.e., each side column is placed on the horizontal foundation surface using the anti-overturning supports, the side columns are connected with crossbeams, and then the uprights, diagonal braces, and other components are connected. All components are directly connected with bolts and nuts; no welding is required. The horizontal foundation surface must be able to withstand the weight of the assembled support frame. S13. After the support frame assembly is completed and passes inspection, remove the temporary anti-overturning supports. Setting up anti-overturning supports can prevent tilting or even overturning of the support frame during assembly, effectively ensuring the safety of construction and installation.

[0034] S20. Using a crane or overhead gantry, assemble the support frames of each layer in reverse order to form a stacked rack. Multiple support frames in the stacked rack are distributed vertically in sequence, and adjacent support frames are connected by interlayer components without welding. Reverse assembly refers to stacking one support frame on top of another, connecting them, and then stacking the entire frame on top of yet another support frame and connecting them, until the required number of layers is reached. Specifically, this includes the following steps: S21. Each support frame needs to be re-inspected first. After the re-inspection is qualified, the stacking frame can be assembled. Before hoisting, the strength of the wire rope should be checked to ensure the safety of hoisting during construction. The wire rope strength verification process is as follows: After the support frame is assembled, it is hoisted using four steel wire ropes; the support frame weighs 20722kg. The hoisting is done at four points, with the steel wire ropes at a 45° angle to the horizontal, and the load is checked at three points.

[0035] Force on a single steel wire rope: F_tension = =95.8kN.

[0036] Wire rope specifications: 6×19+1, 37mm, allowable tensile force: [F_tensile] = =98.5kN, F_tensile < [F_tensile], the verification is qualified.

[0037] S22. Select a support frame as the lower support frame and place this lower support frame on a horizontal foundation surface; S23. Construct a protective frame on site to securely connect the lower support frame to the horizontal foundation surface. S24. Lift another support frame and stack it on top of the lower support frame. Connect the two support frames through interlayer components and keep them in a suspended state during the connection process. The upper support frame should be kept in a suspended state throughout the stacking process to prevent slippage or detachment during the connection between the upper and lower support frames, until the two support frames are adjusted into place and installed and secured.

[0038] S25. Remove the protective frame, lift the connected support frame away, and use the connected support frame as the upper support frame for the next hoisting. S26. Repeat steps S22-S25 until the required number of stacking layers is reached. The stacking assembly process also needs to be carried out on a horizontal base. The stacking assembly process of this invention adopts reverse assembly, eliminating the need to erect additional scaffolding according to changes in stacking height, ensuring uniform construction height, eliminating the need for welding, and effectively improving mechanical efficiency and assembly accuracy.

[0039] S30. Hoist the stacker rack to the upper surface of the installation foundation and secure it to the foundation. Unlike existing technologies where operators need to climb scaffolding and weld layer by layer, S30 also includes preparing temporary support fixtures to store the assembled stacker rack if it is not installed in time, and storing the rack on a hardened horizontal foundation surface. In this assembly method, after hoisting the stacker rack to the installation foundation, operators directly secure it to the foundation on the ground. The securing process is achieved using fasteners, changing the original high-altitude work to ground-based work, making construction easier, improving the working environment, reducing construction safety risks, and improving the safety and reliability of the rack installation.

[0040] This invention employs a modular design, with the rack consisting of multiple support frames. Each support frame contains components manufactured in the factory to ensure manufacturing precision. After processing, the components are transported to the site for on-site assembly, where they are independently assembled into multiple support frames. The rack utilizes a modular integrated product and reverse assembly, effectively reducing construction difficulty, shortening the construction cycle, and enhancing market competitiveness. During assembly, fasteners and interlayer components are used for connection, avoiding on-site welding work and eliminating the contamination of the workshop with large amounts of welding products, ensuring controllable cleanliness. On the same site, the reverse osmosis modules can be directly installed on the racks that are completed first, without waiting for all racks to be assembled before installing the reverse osmosis modules, effectively improving assembly efficiency.

[0041] This invention includes anti-overturning measures, including: (1) Temporary anti-overturning brackets during the assembly process of the support frame are used to prevent the column from tilting or even overturning during the installation process. The column protection brackets are removed after the support frame is fully assembled and passes inspection.

[0042] (2) During the stacking process, a protective frame is made to securely connect the lower support frame to the horizontal foundation surface to prevent the lower support frame from shifting.

[0043] (3) During the on-site construction process, if the stacking frame is not installed in time, temporary support equipment should be made to store the assembled stacking frame to prevent problems such as tilting and overturning of the stacking frame.

[0044] The above three tipping measures effectively avoid problems such as tilting and tipping during the stacking installation process, thus improving the safety of the assembly process.

[0045] This embodiment also specifically discloses the structure of the stacking rack: A prefabricated reverse osmosis module stack rack includes: a shelf unit and an interlayer assembly; the shelf unit includes a plurality of support frames 1 arranged sequentially in a vertical direction, and each pair of adjacent support frames 1 are detachably connected by an interlayer assembly; the prefabricated reverse osmosis module stack rack in this embodiment extends in a vertical direction, requires a small floor area, and is scalable, allowing the number of layers and scale required for assembly to be determined according to the site conditions.

[0046] The support frame 1 includes an upper frame 2, a lower frame 3, and a side column assembly located between the upper frame 2 and the lower frame 3. The upper frame 2 and the lower frame 3 are arranged vertically opposite each other, with a first gap between them. The side column assembly includes multiple side columns 4, with both ends of the multiple side columns 4 detachably connected to the upper frame 2 and the lower frame 3, respectively. The first gap is used to accommodate reverse osmosis modules 5, and the length direction of the reverse osmosis modules is distributed along a first horizontal direction, while the width direction of the reverse osmosis modules is distributed along a second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. Specifically, the side columns can be connected to the upper and lower frames using existing bolt connections. The support frame, composed of the upper frame 2, the lower frame 3, and the side columns 4, is convenient for transportation, can be assembled on-site without the need for a large crane, reduces on-site construction costs, and improves product quality.

[0047] The interlayer assembly includes a first connector 6 and a second connector 7. The first connector 6 is located on the lower frame 3 of the upper support frame 1 among two adjacent support frames 1, and the second connector 7 is located on the upper frame 2 of the lower support frame 1 among two adjacent support frames 1. The first connector 6 and the second connector 7 are connected to connect the two adjacent support frames 1 together. The first and second connectors can be existing bolt assemblies or slots, etc., to firmly connect the support frames of each layer together. By setting the first connector 6 and the second connector 7, adjacent support frames can be quickly spliced ​​together, improving assembly efficiency. Furthermore, the stacking height (determined by the number of support frames) can be adjusted according to the site conditions, making the stacking size adjustable.

[0048] like Figure 2 and Figure 3 As shown, the upper frame 2 includes two first crossbeams 8 and two second crossbeams 9; the two first crossbeams 8 are parallel to the first horizontal direction 9 and are arranged opposite each other, and the two second crossbeams 9 are parallel to the second horizontal direction and are arranged opposite each other. The first crossbeams 8 and the adjacent second crossbeams 9 are detachably connected to form the upper frame 2. The lower frame 3 includes two third crossbeams 10 and two fourth crossbeams 11. The two third crossbeams 10 are respectively vertically aligned with the two first crossbeams 8, and the two fourth crossbeams 11 are respectively vertically aligned with the two second crossbeams 9. The third crossbeams 10 and adjacent fourth crossbeams 11 are detachably connected to form the lower frame 3. The first crossbeams 8 and second crossbeams 9, and the third crossbeams 10 and fourth crossbeams 11 can be connected using existing bolt sets. In this embodiment, both the upper frame 2 and the lower frame 3 are rectangular frames. By setting the upper frame 2 and the lower frame 3 as a detachable structure, all components in this stack can be disassembled. On-site, numerous connecting components can be used to quickly connect the various parts into a whole, effectively improving the stacking installation efficiency. During use, it is convenient to inspect and replace damaged parts, effectively reducing costs and having good social and economic benefits.

[0049] Preferably, there are four side columns 4, which are correspondingly positioned at the four corners of the upper frame 2 and the lower frame 3. Placing the side columns at the four corners of the upper frame 2 and the lower frame 3 facilitates the arrangement of the reverse osmosis module 5. The support frame 1 also includes a support structure, the two ends of which are detachably connected to the first crossbeam 8 and the third crossbeam 9, which are directly opposite each other. The support structure provides support at the height of the support frame 1, thereby improving the stability of the support frame 1. At the same time, the support structure is also detachable, which facilitates assembly, maintenance and replacement.

[0050] In this embodiment, the support structure includes a column 12. The top end of the column 12 is detachably connected to the midpoint of the first crossbeam 8, and the bottom end of the column 12 is detachably connected to the midpoint of the third crossbeam 10. By setting the columns 12 at the midpoints of the first crossbeam 8 and the third crossbeam 10, the structure is simple while improving the stability of the first crossbeam 8 and the third crossbeam 10. Alternatively, the columns can be connected to the first crossbeam 8 and the third crossbeam 10 using existing bolt assemblies.

[0051] Preferably, the support structure further includes a diagonal brace 13, which is detachably installed between the upright column 13 and the side column 4 on the same side. The diagonal brace 13 further improves the stability of the support frame 1. The diagonal brace 13 is one of angle steel, square steel, or channel steel. Material selection is convenient, reducing costs.

[0052] like Figure 4 As shown, in this embodiment, the top and / or bottom of the side column 4 are provided with a first fixing plate 14 facing the column 10, and the column 10 is provided with a second fixing plate corresponding to the first fixing plate 14. The two ends of the diagonal brace 13 are bolted to the first fixing plate 14 and the second fixing plate, respectively. With this arrangement, the diagonal brace 13 is connected to the column and the side column through the fixing plates, which is simple in structure and convenient for construction.

[0053] Specifically, the support frame 1 also includes a receiving frame, which is disposed in the first interval for fixing the reverse osmosis module 5. The receiving frame includes multiple receiving rods 15 and limiting members 16; the multiple receiving rods 15 are distributed vertically at intervals within the first interval of the support frame 1, and all multiple receiving rods 15 are parallel to the second horizontal direction. The two ends of each receiving rod 15 are detachably connected to the corresponding side column 4. The limiting members 16 are evenly distributed along the second horizontal direction on the receiving rods 15 for fixing the reverse osmosis module.

[0054] like Figure 4 As shown, the limiting member 16 can be in the form of a U-shaped positioning ring. The open end of the U-shaped positioning ring is detachably connected to the receiving rod 15 to fix the reverse osmosis membrane tube within the space defined by the U-shaped positioning ring and the receiving rod 15. A buffer pad 17 is also arranged below the U-shaped positioning ring to protect the reverse osmosis membrane tube.

[0055] In practice: In this implementation, all components, including the first crossbeam 8, second crossbeam 9, third crossbeam 10, fourth crossbeam 11, first connector 6, second connector 7, side column 4, upright column 12, diagonal brace 13, first fixing plate 14, second fixing plate, supporting rod 15, and limiting component 16, are manufactured in the factory and assembled on-site. The height of each stacking rack can be adjusted by changing the number of support frames 1. Depending on the site conditions, it can be a single-layer, two-layer, or even multi-layer stacking rack structure. When the stacking rack is set only vertically, it can effectively reduce the floor space occupied. Of course, multiple stacking racks can also be set up side by side as needed to achieve large-scale configuration.

[0056] In this embodiment, all components of the stacking rack are detachable. When a part of the stacking rack needs to be replaced or repaired, it can be achieved by disassembling the connecting components at the corresponding location. If it is necessary to replace the entire reverse osmosis module arranged in a certain support frame, simply disassemble the interlayer components, separate the adjacent support frames, and then hoist and replace the support frame that needs to be replaced, which facilitates on-site construction and reduces downtime for maintenance.

[0057] In existing technologies, large-scale seawater desalination involves a massive number of reverse osmosis (RO) racks and membrane elements, requiring high levels of cleanliness and airtightness within the membrane housing pressure vessel. The membrane housing pressure vessel is made of FRP (fiberglass reinforced plastic), necessitating a flat rack without sharp edges to prevent damage to the membrane housing. Furthermore, the racks can be as high as 11 meters, potentially posing risks for work at heights. Additionally, RO units are often located in the center of the workshop, resulting in significant scaffolding work and increased construction time. Therefore, the construction method and rack arrangement described in this invention offer the following advantages: (1) Safety and environmental protection during construction. In the original construction method, dust and noise pollution would be generated during the cutting, weld cleaning, and grinding of the components of the frame. However, this application adopts factory processing and on-site pre-assembly, which eliminates a large amount of welding products and scaffolding pollution in the workshop, ensuring controllable cleanliness. The assembly of one reverse osmosis stack will not affect the installation of another membrane, increasing the construction concurrency rate, improving the pass rate of the airtightness test, and accelerating the installation progress of the seawater desalination reverse osmosis unit. Based on the estimated construction period of a seawater desalination unit of 450,000 tons / day, compared with the original construction plan, the construction period of the reverse osmosis module unit alone will be reduced by 10 days.

[0058] (2) Modular installation of reverse osmosis module stacking racks saves costs. Ground assembly and overall hoisting allow for placement of 11 m units in one go, reducing high-altitude work by 50%. If the frame, pipes, and cable racks are modularly installed, only bolts and positioning pins are needed on-site, reducing the installation time of a single module from 4 days to 0.5 days and saving approximately 60% of labor.

[0059] (3) FRP pressure vessels suffer less damage and have a high integrity rate. The reverse osmosis membrane unit frame components are prefabricated in the factory without obtuse angles, and the flatness is ≤1mm. There is no cutting on site, no burrs or sharp corners of components, etc. The probability of the membrane shell being scratched during installation is reduced, which greatly improves the integrity rate of the membrane shell during installation.

[0060] (4) High utilization rate of on-site construction site. During on-site construction operations, the site area is saved by more than 30% for construction operations alone. If multiple sets of reverse osmosis modules are constructed simultaneously, the space saved at the construction site is even greater.

[0061] Based on the above analysis, for a 450,000-ton / day seawater desalination reverse osmosis unit, the installation of the frame alone is expected to save 25 days of construction time using this method. Considering factory processing and elevator rental costs of 100,000 yuan, the estimated savings in labor costs are 380,000 yuan, resulting in a total cost saving of 280,000 yuan. Therefore, this application provides a safer, more environmentally friendly, and time-saving and cost-effective construction method with good socio-economic benefits and broad market promotion value.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for constructing a prefabricated reverse osmosis module stacking system, characterized in that, include: S10. Each layer of support frame is assembled independently on the construction site. During the assembly process, fasteners are used to hold the various components together, and no welding construction is required on site. S20. Using a crane or overhead crane, the support frames of each layer are assembled in reverse order to form a stacked rack. The multiple support frames in the stacked rack are distributed in sequence along the vertical direction. Adjacent support frames are connected by interlayer components without welding. The reverse assembly means that one support frame is stacked on top of another support frame and connected, and then stacked on top of another support frame and connected, until the required number of layers of the stacked rack is reached. S30. Hoist the stacker to the upper surface of the installation foundation and fix the stacker to the installation foundation.

2. The construction method for prefabricated reverse osmosis module stacking according to claim 1, characterized in that: In S10, assembling the support frame includes the following process: S11. Fabricate temporary anti-tipping supports on site; S12. Assemble the support frame using temporary anti-overturning brackets; S13. After the support frame is assembled and passes inspection, the temporary anti-tipping support will be removed.

3. The construction method for prefabricated reverse osmosis module stacking according to claim 1, characterized in that: S20 includes: S21. Before hoisting, check the strength of the wire rope; S22. Select a support frame as the lower support frame and place this lower support frame on a horizontal foundation surface; S23. Construct a protective frame on site to securely connect the lower support frame to the horizontal foundation surface. S24. Lift another support frame and stack it on top of the lower support frame. Connect the two support frames through interlayer components and keep them in the lifting state during the connection process. S25. Remove the protective frame, lift the connected support frame away, and use the connected support frame as the upper support frame for the next hoisting. S26. Repeat steps S22-S25 until the required number of stacking layers is reached.

4. The construction method for prefabricated reverse osmosis module stacking according to claim 1, characterized in that: S30 also includes that if the stacker is not installed in time, temporary support fixtures should be made to store the assembled stacker, and the stacker should be stored on a hardened horizontal foundation surface.

5. The construction method for prefabricated reverse osmosis module stacking according to claim 1, characterized in that: In S10, the quality of each component is inspected before the support frame is installed.

6. The construction method for prefabricated reverse osmosis module stacking according to claim 1, characterized in that: In S20, each support frame needs to be re-inspected first. Only after the re-inspection is qualified can the stacking frame be assembled.

7. A prefabricated reverse osmosis module stack rack, characterized in that: It includes an interlayer assembly and several support frames arranged sequentially in a vertical direction, and each pair of adjacent support frames is detachably connected by the interlayer assembly; The support frame includes an upper frame, a lower frame, and a side column assembly located between the upper frame and the lower frame. The upper frame and the lower frame are arranged vertically opposite each other, and there is a first gap between the upper frame and the lower frame. The side column assembly includes multiple side columns, and the two ends of the multiple side columns are detachably connected to the upper frame and the lower frame, respectively. The first gap is used to accommodate the reverse osmosis module, and the length direction of the reverse osmosis module is distributed along a first horizontal direction, and the width direction of the reverse osmosis module is distributed along a second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. The interlayer assembly includes a first connector and a second connector; the first connector is located on the lower frame of the upper support frame of the two adjacent support frames, and the second connector is located on the upper frame of the lower support frame of the two adjacent support frames, and the first connector and the second connector are connected to connect the two adjacent support frames together.

8. The prefabricated reverse osmosis module stack rack according to claim 7, characterized in that: The upper frame includes two first crossbeams and two second crossbeams; the two first crossbeams are parallel to a first horizontal direction and arranged opposite each other, and the two second crossbeams are parallel to a second horizontal direction and arranged opposite each other. The first crossbeams and the adjacent second crossbeams are detachably connected to form the upper frame. The lower frame includes two third crossbeams and two fourth crossbeams; the two third crossbeams are respectively arranged vertically opposite to the two first crossbeams, and the two fourth crossbeams are respectively arranged vertically opposite to the two second crossbeams. The third crossbeams are detachably connected to the adjacent fourth crossbeams to form the lower frame.

9. The prefabricated reverse osmosis module stack rack according to claim 8, characterized in that: The number of side columns is four, and the four side columns are respectively set at the four corners of the upper frame and the lower frame. The support frame also includes a support structure, and the two ends of the support structure are detachably connected to the first crossbeam and the third crossbeam that are directly opposite each other.

10. The prefabricated reverse osmosis module stack rack according to claim 9, characterized in that: The support structure includes a column, the top of which is detachably connected to the midpoint of the first crossbeam, and the bottom of which is detachably connected to the midpoint of the third crossbeam.

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