Liquid caustic soda final concentrator assembly type support platform

Abstract

The application discloses an assembled support platform of a liquid caustic soda final concentrator, the support platform is provided with a first through hole coaxial with a first pipe body of the liquid caustic soda final concentrator and a second through hole coaxial with a plurality of second pipe bodies, the inner diameter of the first through hole is greater than the outer diameter of a pipe opening flange of the first pipe body, and the second through hole is greater than the outer diameter of a pipe opening flange of the second pipe body; a first support ring is sleeved between the pipe opening flange of the first pipe body and the support platform, a second support ring is sleeved between the pipe opening flange of the second pipe body and the support platform, and the first support ring and the second support ring are both half structures. The assembled support platform can make the first pipe body and the second pipe body welded with a shell of the liquid caustic soda final concentrator first, and then the support platform is assembled, so that the welding quality of the first pipe body and the second pipe body and the shell is guaranteed, and the welding efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of liquid alkali final concentrator manufacturing technology, and in particular to an assembled support platform for a liquid alkali final concentrator. Background Technology

[0002] In the chlor-alkali industry's ion-exchange membrane electrolysis process, refined brine enters the anode chamber, and pure water enters the cathode chamber. After electrolysis, chlorine gas is generated in the anode chamber, and hydrogen gas and sodium hydroxide are generated in the cathode chamber. The sodium hydroxide is concentrated through staged evaporation. When the sodium hydroxide concentration reaches above 98%, the concentration is stopped. Subsequently, after flash evaporation, it enters the caustic soda flake machine through a distributor to produce caustic soda flakes. Sodium hydroxide flakes are sold as a commodity. The liquid caustic soda final concentrator is a gas-liquid separator that separates high-temperature (approximately 400℃), high-concentration (above 60%) sodium hydroxide input through falling film tubes, bringing its concentration to above 98% and then stopping the concentration process. See [link to relevant documentation]. Figure 1 .

[0003] Currently, in the manufacturing process of the liquid alkali concentrator, the shell contains a large-diameter pipe and several small-diameter pipes. When welding these process pipes to the shell, they must achieve full penetration, a full weld, and a 6mm weld leg height. These pipes must also be fixed (suspended by pipe end flanges) to a support platform. However, conventional welding operations often result in welding defects. The closer the pipe is to the top of the shell, the smaller the space between the support platform and the (arc-shaped) shell becomes, increasing the welding difficulty. This leads to incomplete penetration, insufficient weld fullness, and inadequate weld leg height in certain areas, compromising weld quality and posing significant safety hazards. Furthermore, the shell and support platform are rigidly connected. Once the pipe is welded to the shell, a rigid connection is formed between the support platform, the shell, and the pipe end flanges, making disassembly extremely difficult and creating potential problems for future equipment maintenance and replacement. Summary of the Invention

[0004] To address the aforementioned problems, this application aims to provide a modular support platform for a liquid alkali final concentrator. This platform allows the first and second pipe bodies to be welded to the shell of the liquid alkali final concentrator without obstruction or space limitations imposed by the support platform. This ensures the welding quality of the first and second pipe bodies to the shell and solves the problem of limited welding space for the first and second pipe bodies caused by the support platform during the current welding process. Furthermore, by disassembling the first and second support rings from the support platform, the support platform can be separated from the liquid alkali final concentrator, facilitating maintenance and replacement.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a prefabricated support platform for a liquid alkali final concentrator, wherein a first tube is provided on one side of the top of the liquid alkali final concentrator, and a plurality of second tubes are symmetrically distributed on the left and right sides behind the first tube, and both the first tube and the second tube are vertically welded to the liquid alkali final concentrator; the support platform is horizontally and integrally ringed around the first tube and the second tube, and the support platform is provided with a first through hole coaxial with the first tube and a second through hole coaxial with the plurality of second tubes, wherein the inner diameter of the first through hole is larger than the outer diameter of the flange of the pipe opening of the first tube, and the second through hole is larger than the outer diameter of the flange of the pipe opening of the second tube; A first support ring is fitted between the flange of the pipe opening of the first pipe body and the support platform. The inner diameter of the first support ring is smaller than the outer diameter of the flange of the pipe opening of the first pipe body and close to the outer diameter of the first pipe body. The outer diameter of the first support ring is larger than the diameter of the first perforation hole. A second support ring is fitted between the flange of the pipe opening of the second pipe body and the support platform. The inner diameter of the second support ring is smaller than the outer diameter of the flange of the pipe opening of the second pipe body and close to the outer diameter of the second pipe body. The outer diameter of the second support ring is larger than the diameter of the second perforation hole. Both the first and second support rings are half-structured. After the pipe end flange of the first pipe body is passed upward through the first through hole and the pipe end flange of the second pipe body is passed upward through the second through hole, the first support ring is spliced ​​in half between the pipe end flange of the first pipe body and the support platform, and the second support ring is spliced ​​in half between the pipe end flange of the second pipe body and the support platform. The first and second pipe bodies are suspended on the support platform, and the first and second support rings are bolted to the support platform.

[0006] Preferably, the support platform is provided with multiple support legs on both sides, through which the liquid alkali final concentrator is suspended below the support platform.

[0007] Preferably, an angle steel is fitted on the support leg corresponding to the middle of the liquid alkali final concentrator, and an arc-shaped support plate is provided at the outer end of the angle steel that is in contact with the arc surface of the outer wall of the liquid alkali final concentrator.

[0008] Preferably, the top of the inner diameter of the first support ring and the second support ring is set as an arc-shaped surface, so that the arc-shaped surface is in close contact with the pipe flange of the first pipe body and the pipe flange of the second pipe body.

[0009] The beneficial effects of this application are: during welding, the prefabricated support platform allows the first and second pipe bodies to be welded to the shell of the liquid alkali final concentrator before being assembled with the support platform, without being obstructed or limited by the support platform, thus ensuring the welding quality of the first and second pipe bodies to the shell.

[0010] The assembly of the first and second support rings allows the support platform to be connected to the first and second pipe bodies, effectively solving the problem of limited welding space between the support platform and the first and second pipe bodies during current welding processes. This prefabricated support platform not only ensures welding quality but also improves welding efficiency. In the event of later maintenance or replacement, the first and second support rings can be disassembled using bolts, allowing for easy separation of the support platform from the final alkali concentrator. Attached Figure Description

[0011] Figure 1 The diagram shows the arrangement of the first and second pipes above the final alkali concentrator.

[0012] Figure 2 for Figure 1 Top view.

[0013] Figure 3 This is a structural diagram of the first and second support rings of this application.

[0014] Figure 4 This is a structural diagram of the supporting platform for this application.

[0015] Figure 5 This is a top view of the platform supporting this application.

[0016] Figure 6 This is an assembly drawing of the first tube body and support platform of this application.

[0017] Figure 7 For this application Figure 6 The first support ring is fixed by bolts.

[0018] Figure 8 This is an assembly drawing of the second tube body and support platform of this application.

[0019] Figure 9 For this application Figure 8 The second support ring is fixed by bolts.

[0020] Figure 10 This is an overall assembly drawing of the supporting platform and the liquid alkali final concentrator for this application.

[0021] Figure 11 For this application Figure 10 Top view.

[0022] Figure 12 For this application Figure 11 Sectional view along line A.

[0023] In the diagram: 1-Liquid alkali final concentrator; 21-First tube body; 22-Second tube body; 2a-Tube end flange; 3-Support platform; 3a-First perforation; 3b-Second perforation; 41-First support ring; 42-Second support ring; 4a-Arc-shaped surface; 5-Bolt; 6-Support leg; 7-Angle steel; 8-Arc-shaped support plate. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figures 1-2 As shown, a first tube 21 is provided on one side of the top of the liquid alkali concentrator 1. Multiple second tubes 22 are symmetrically distributed on the left and right sides behind the first tube 21. Both the first tube 21 and the second tubes 22 are vertically welded to the liquid alkali concentrator 1. Before welding, welding holes for connecting the first tubes 21 and the second tubes 22 are pre-drilled on the shell of the liquid alkali concentrator 1. The liquid alkali concentrator 1, the first tube 21, and the second tubes 22 are preferably made of nickel. The support platform 3 is horizontally and integrally ringed around the first tubes 21 and the second tubes 22 (currently, the perforations on the support platform 3 match the outer diameters of the first tubes 21 and the second tubes 22, but are smaller than the outer diameter at the tube opening flange 2a). The first tubes 21 and the second tubes 22 are suspended by the tube opening flange 2a.

[0026] Currently, when welding the pipes, the first pipe 21 and the second pipe 22 are passed downward through the perforation on the support platform 3 and then docked with the shell of the liquid alkali final concentrator 1. Welding is carried out at the docking point, which is located below the support platform 3. Due to the obstruction of the support platform 3, the welding space becomes smaller as it gets closer to the top of the shell.

[0027] To address the welding problems caused by the limited space of the support platform 3 during the welding of the first tube 21 and the second tube 22 to the shell of the liquid alkali concentrator 1, please refer to the attached... Figures 3-12 As shown, this application provides a prefabricated support platform 3 for a liquid alkali final concentrator 1, as follows: Figure 5As shown, the support platform 3 has a first through hole 3a coaxial with the first tube 21 and a second through hole 3b coaxial with several second tubes 22. The inner diameter of the first through hole 3a is larger than the outer diameter of the flange 2a at the opening of the first tube 21, and the second through hole 3b is larger than the outer diameter of the flange 2a at the opening of the second tube 22. Since the diameters of the first through hole 3a and the second through hole 3b on the support platform 3 are larger than the flanges 2a at the openings of the first tube 21 and the second tube 22, respectively, during welding, the first tube 21 and the second tube 22 are first circumferentially welded to the shell of the final liquid alkali concentrator 1. Because the first tube 21 and the second tube 22 are not pre-connected to the support platform 3, the welding of the first tube 21 and the second tube 22 to the shell of the final liquid alkali concentrator 1 is an open welding process, enabling complete welding between the first tube 21 and the second tube 22 and the shell of the final liquid alkali concentrator 1, thus solving the problems of obstruction by the support platform 3 and limited welding space.

[0028] After the first tube 21 and the second tube 22 are first welded to the shell of the liquid alkali final concentrator 1, in order to facilitate the ring connection and welding operation of the support platform 3 to the first tube 21 and the second tube 22, as follows: Figure 6 As shown, a first support ring 41 is sleeved between the pipe flange 2a of the first pipe body 21 and the support platform 3. The inner diameter of the first support ring 41 is smaller than the outer diameter of the pipe flange 2a of the first pipe body 21 and close to the outer diameter of the first pipe body 21. The outer diameter of the first support ring 41 is larger than the diameter of the first through hole 3a. That is, after the first support ring 41 is sleeved under the pipe flange 2a of the first pipe body 21, the width between the inner and outer diameters of the first support ring 41 covers the gap between the pipe flange 2a of the first pipe body 21 and the first through hole 3a, thereby realizing that the first support ring 41 is supported on the support platform 3 and supports the pipe flange 2a of the first pipe body 21. Then, the first support ring 41 is welded to the support platform 3 outside the first through hole 3a to realize the connection between the first pipe body 21 and the support platform 3.

[0029] Similarly, such as Figure 8 As shown, a second support ring 42 is fitted between the pipe flange 2a of the second pipe body 22 and the support platform 3. The inner diameter of the second support ring 42 is smaller than the outer diameter of the pipe flange 2a of the second pipe body 22 and close to the outer diameter of the second pipe body 22. The outer diameter of the second support ring 42 is larger than the diameter of the second through hole 3b. The connection method is the same as that of the first pipe body 21. The support platform 3, the first support ring 41, and the second support ring 42 are preferably made of steel.

[0030] Since the first tube 21 and the second tube 22 have been pre-welded to the shell of the liquid alkali concentrator 1, and the outer diameter of the flange 2a at the opening of the first tube 21 and the second tube 22 is larger than the inner diameter of the first support ring 41 and the second support ring 42, the first support ring 41 and the second support ring 42 cannot be inserted downwards from the top (at the flange 2a) of the first tube 21 and the second tube 22. Therefore, to solve this problem, as follows... Figure 3 , 7 As shown in Figures 9 and 1, both the first support ring 41 and the second support ring 42 are half-structures (i.e., the entire first support ring 41 and the second support ring 42 are cut in half). After the first tube body 21 and the second tube body 22 are welded to the shell of the liquid alkali final concentrator 1, the liquid alkali final concentrator 1 is moved upward, so that the pipe opening flange 2a of the first tube body 21 passes upward through the first through hole 3a and the pipe opening flange 2a of the second tube body 22 passes upward through the second through hole 3b. Then, the first support ring 41 is spliced ​​in half from the left and right sides horizontally between the pipe opening flange 2a of the first tube body 21 and the support platform 3, and the second support ring 41 is spliced ​​in half. The two halves are spliced ​​between the pipe flange 2a of the second pipe body 22 and the support platform 3, while the first support ring 41 and the second support ring 42 are preferably connected to the support platform 3 by bolts 5, so as to smoothly realize the assembly of the first support ring 41 and the second support ring 42, as well as the welding or connection between the support platform 3 and the first pipe body 21 and the second pipe body 22. Through this assembled support platform 3, the problem of limited welding space for the first pipe body 21 and the second pipe body 22 in the current welding process is effectively solved. This assembled support platform 3 not only ensures the welding quality, but also improves the welding efficiency.

[0031] After the above welding is completed, the support platform 3 needs to provide suspension support for the liquid alkali final concentrator 1. Therefore, as follows: Figure 4 , 12 As shown, the support platform 3 preferably has six support legs 6 on both sides, which are preferably H-beams and symmetrically distributed on both sides of the support platform 3. The height of the support legs 6 is greater than that of the liquid alkali final concentrator 1, therefore... Figure 10 As shown, the liquid alkali final concentrator 1 is suspended on the support platform 3 by the support leg 6, which is a supporting structure for the liquid alkali final concentrator 1.

[0032] To ensure the stability of the suspension support for the final alkali concentrator 1, such as... Figure 12 As shown, an angle steel 7 is mounted on the support leg 6 corresponding to the middle part of the liquid alkali concentrator 1, and is connected and fixed to the support leg 6 by bolts 5. Furthermore, an arc-shaped support plate 8 is provided at the outer end of the angle steel 7, which is in contact with the arc surface of the outer wall of the liquid alkali concentrator 1. By having the arc-shaped support plate 8 in contact with the arc surface of the liquid alkali concentrator 1 shell, the liquid alkali concentrator 1 can be supported from the middle position, improving the suspension stability of the liquid alkali concentrator 1.

[0033] like Figure 6 , 8 As shown, preferably, the top of the inner diameter of the first support ring 41 and the second support ring 42 is set as an arc-shaped surface 4a, through which the arc-shaped surface 4a is closely fitted with the pipe flange 2a of the first pipe body 21 and the pipe flange 2a of the second pipe body 22. Compared with the right-angle side structure, this arc-shaped surface fits more easily with the separate first support ring 41 and the second support ring 42, which are then fitted to the bottom of the pipe flange 2a of the first pipe body 21 and the second pipe body 22, making the support of the first support ring 41 and the second support ring 42 for the steam pipe mounted on the first pipe body 21 and the falling film pipe mounted on the second pipe body 22 more stable.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope of protection, and all such changes and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A modular support platform for a liquid alkali final concentrator, wherein a first tube is provided on one side of the top of the liquid alkali final concentrator, and a plurality of second tubes are symmetrically distributed on the left and right sides behind the first tube, and both the first and second tubes are vertically welded to the liquid alkali final concentrator; the support platform is horizontally and integrally ringed around the first and second tubes, characterized in that: The support platform has a first through hole coaxial with the first tube and a second through hole coaxial with a plurality of second tubes. The inner diameter of the first through hole is larger than the outer diameter of the flange of the first tube, and the second through hole is larger than the outer diameter of the flange of the second tube. A first support ring is fitted between the flange of the pipe opening of the first pipe body and the support platform. The inner diameter of the first support ring is smaller than the outer diameter of the flange of the pipe opening of the first pipe body and close to the outer diameter of the first pipe body. The outer diameter of the first support ring is larger than the diameter of the first perforation hole. A second support ring is fitted between the flange of the pipe opening of the second pipe body and the support platform. The inner diameter of the second support ring is smaller than the outer diameter of the flange of the pipe opening of the second pipe body and close to the outer diameter of the second pipe body. The outer diameter of the second support ring is larger than the diameter of the second perforation hole. Both the first and second support rings are half-structured. After the pipe end flange of the first pipe body is passed upward through the first through hole and the pipe end flange of the second pipe body is passed upward through the second through hole, the first support ring is spliced ​​in half between the pipe end flange of the first pipe body and the support platform, and the second support ring is spliced ​​in half between the pipe end flange of the second pipe body and the support platform. The first and second pipe bodies are suspended on the support platform, and the first and second support rings are bolted to the support platform.

2. The prefabricated support platform according to claim 1, characterized in that: The support platform has multiple support legs on both sides, which suspend the liquid alkali concentrator below the support platform.

3. The prefabricated support platform according to claim 2, characterized in that: An angle steel is mounted on the support leg corresponding to the middle part of the liquid alkali final concentrator, and an arc-shaped support plate is provided at the outer end of the angle steel that is in contact with the arc surface of the outer wall of the liquid alkali final concentrator.

4. The prefabricated support platform according to claim 1, characterized in that: The top of the inner diameter of the first and second support rings is set as an arc-shaped surface, which is closely fitted with the pipe opening flange of the first pipe body and the pipe opening flange of the second pipe body through the arc-shaped surface.

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