Fluidized bed heat exchange tube support device

Abstract

The utility model discloses a fluidized bed heat exchange pipe support device, including upper support part and draw board, the upper support part top surface is established with a plurality of first clamping slot, the draw board top is through a plurality of sliding block sliding connection upper support part, the upper support part bottom is established with a plurality of accommodating groove of matching with the sliding block. Compared with prior art, the sliding block of the utility model will support the upper support part, so that the height of upper support part and draw board is equal to the design interval of heat exchange pipe, realize vertical positioning, and the interval of heat exchange pipe horizontal direction can be determined after first clamping slot is positioned to heat exchange pipe, realize horizontal positioning, ensure that the interval between upper and lower left and right adjacent heat exchange pipes strictly comply with design size, and, the accommodating groove of sliding block sliding into the bottom of upper support part can reduce the overall height of upper support part and draw board to less than the heat exchange pipe gap, facilitate both from the gap to draw out together, and will not cause excessive wear to heat exchange pipe.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed technology, and in particular to a fluidized bed heat exchanger tube support device. Background Technology

[0002] Traditional fluidized bed heat exchanger tube installation involves positioning and fixing the tubes using a grid within the device (e.g., Figure 10 (As shown). When welding heat exchange tubes, simply pass the heat exchange tubes through the grid to complete positioning and support, thus enabling welding.

[0003] Modern fluidized beds, in order to reduce internal components, maintain good material fluidization, and prevent material agglomeration during operation, have eliminated the grid device and replaced it with a double-layer rib structure to fix the heat exchange tubes. Because the grid device has been eliminated, the heat exchange tubes cannot be positioned during installation, and welding must be done layer by layer from bottom to top. Furthermore, using ribs to fix the heat exchange tubes leaves the bottom unsupported.

[0004] The current solution involves creating circular grooves in the upper support section of a steel plate at the corresponding positions of the heat exchange tubes, allowing it to fit snugly against the tubes. During installation, the heat exchange tubes are laid layer by layer from bottom to top for positioning and support. However, this design makes it difficult to remove the upper support section after transportation to the destination. The current method involves forcibly prying it to the side and then pulling it out. This method requires a great deal of force to remove the upper support section, and it generates significant friction between the upper support section and the heat exchange tubes, causing wear on the tube surface. Utility Model Content

[0005] The main purpose of this utility model is to provide a fluidized bed heat exchanger tube support device. The slider slides into the receiving groove at the bottom of the upper support part, which can reduce the overall height of the upper support part and the pull plate to less than the gap between the heat exchanger tubes, so that the two can be pulled out from the gap together without causing excessive wear to the heat exchanger tubes.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fluidized bed heat exchanger tube support device includes an upper support part and a pull plate. The top surface of the upper support part is provided with a plurality of first slots. The top of the pull plate is slidably connected to the upper support part by a plurality of sliders. The bottom of the upper support part is provided with a plurality of receiving slots that match the sliders.

[0007] Furthermore, several of the sliders are fixed to the top of the pull plate, and a groove is provided at the bottom of the upper support, in which the sliders are slidably connected.

[0008] Furthermore, a baffle is fixed to one side of the chute.

[0009] Furthermore, the upper support and the pull plate are fixedly connected by a fixing assembly.

[0010] Furthermore, the fixing assembly includes a column fixed to the top of the pull plate, a fixing plate fixed to one side of the upper support, and the column and the fixing plate are connected by bolts.

[0011] Furthermore, several of the sliders are evenly arranged along the length of the pull plate.

[0012] Furthermore, the positions of the first card slot and the receiving slot are offset.

[0013] Furthermore, it also includes a lower support portion disposed at the bottom of the pull plate, wherein a plurality of second slots are provided on the bottom surface of the lower support portion.

[0014] Furthermore, a limiting groove is formed on the top surface of the lower support, and the pull plate is slidably connected to the limiting groove.

[0015] Furthermore, both the first card slot and the second card slot are arc-shaped.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The slider of this utility model supports the upper support part, so that the height of the upper support part and the pull plate are equal to the design spacing of the heat exchange tubes, thus achieving vertical positioning. After the first slot positions the heat exchange tubes, it can determine the horizontal spacing of the heat exchange tubes, thus achieving lateral positioning. This ensures that the spacing between adjacent heat exchange tubes on the top, bottom, left, and right strictly conforms to the design dimensions. Furthermore, the slider slides into the receiving groove at the bottom of the upper support part, which can reduce the overall height of the upper support part and the pull plate to less than the gap between the heat exchange tubes, making it easy for both to be pulled out from the gap together without causing excessive wear to the heat exchange tubes.

[0017] The slider at the top of the pull plate of this utility model is slidably connected to the groove at the bottom of the upper support. The groove effectively limits the lateral movement of the slider, and together with the baffle blocking the outermost slider, it ensures that the upper support and the pull plate always maintain the correct relative position. After being tightened by the columns, fixing plates and bolts of the fixing components, the entire device forms a rigid support structure, which can provide stable vertical support for the heat exchange tubes to be installed above, preventing the pipes from sagging or shifting due to their own weight during the welding process. It facilitates the construction personnel to lay and install the tubes layer by layer from bottom to top, ensuring the accuracy of the welding and the operating space during the welding of each layer of heat exchange tubes, and ultimately achieving precise welding and fixing of the entire heat exchange tube bundle.

[0018] The bolts of this invention will thoroughly secure the fixing plate on one side of the upper support to the column at the top of the pull plate, forming a reliable connection node and preventing relative misalignment between the upper support and the pull plate during transportation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the upper support part and the connection structure of the pull plate of a fluidized bed heat exchanger tube support device according to the present invention.

[0020] Figure 2 This is a schematic diagram of the upper support structure of a fluidized bed heat exchanger tube support device according to the present invention.

[0021] Figure 3 This is a schematic diagram of the pull plate structure of a fluidized bed heat exchanger tube support device according to the present invention.

[0022] Figure 4 This is a schematic diagram showing the connection between the upper support part, the pull plate, and the lower support part of a fluidized bed heat exchanger tube support device according to this utility model.

[0023] Figure 5 This is a schematic diagram of the lower support structure of a fluidized bed heat exchanger tube support device according to the present invention.

[0024] Figure 6 This is a schematic diagram showing the connection between the pull plate and the lower support part of a fluidized bed heat exchanger tube support device according to this utility model.

[0025] Figure 7 This is a schematic diagram of the upper support part, pull plate and heat exchange tube of a fluidized bed heat exchange tube support device according to the present invention.

[0026] Figure 8 This is a schematic diagram of the upper support part, pull plate, lower support part and heat exchange tube of a fluidized bed heat exchange tube support device according to the present invention.

[0027] Figure 9 This is a schematic diagram of the auxiliary support position during the disassembly of a fluidized bed heat exchanger tube support device according to this utility model.

[0028] Figure 10 This is a schematic diagram of a grid structure in the prior art.

[0029] Figure 11 This is a schematic diagram of the welded structure of the rib plate and the heat exchange tube.

[0030] In the diagram: 1. Upper support; 101. First slot; 102. Receiving slot; 103. Slide groove; 104. Baffle; 2. Pull plate; 201. Slider; 3. Fixing assembly; 301. Column; 302. Fixing plate; 303. Bolt; 4. Lower support; 401. Second slot; 402. Limiting slot; 5. Auxiliary ramp. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0032] like Figure 1-6As shown, a fluidized bed heat exchanger tube support device includes an upper support part 1 and a pull plate 2. The upper support part 1 is a rectangular plate. Several first slots 101 are opened on the top surface of the upper support part 1. The top of the pull plate 2 is slidably connected to the upper support part 1 through several sliders 201. Several receiving slots 102 matching the sliders 201 are opened at the bottom of the upper support part 1. The number of sliders 201 and receiving slots 102 are the same.

[0033] In this embodiment, a plurality of sliders 201 are evenly arranged along the length of the pull plate 2, and the positions of the first slot 101 and the receiving slot 102 are staggered.

[0034] When installing and welding the heat exchanger tubes, the device should be arranged according to... Figure 7 As shown in the diagram, the slider 201 is in contact with the bottom surface of the upper support 1. At this time, the spacing between the heat exchange tubes on the upper and lower sides of the device meets the design requirements, and the heat exchange tube located above the device is positioned by the first slot 101. Therefore, when the present invention uses this device to weld and install the heat exchange tubes, it can ensure that the distance between multiple heat exchange tubes meets the design dimensions, and at the same time, it can provide support for the heat exchange tube located above the device, ensuring that subsequent pipelines can be installed smoothly.

[0035] When the heat exchange tubes are welded or transported to their destination and the device needs to be disassembled, the pull plate 2 can be pulled outwards, causing the slider 201 to slide within the groove 103. This places the slider 201 directly below the receiving groove 102. At this time, the upper support 1, being unsupported, will fall under the force of gravity, causing the slider 201 to remain within the receiving groove 102. Consequently, the combined height of the upper support 1 and the pull plate 2 is less than the distance between the upper and lower heat exchange tubes. Therefore, by continuing to pull the pull plate 2, the pull plate 2 and the upper support 1 can be pulled out together from the gap between the heat exchange tubes, thus completing the disassembly of the device.

[0036] like Figure 2 As shown, several sliders 201 are fixed to the top of the pull plate 2. The bottom of the upper support part 1 is provided with a groove 103. The sliders 201 are slidably connected in the groove 103. The groove 103 can limit the sliders 201, thereby ensuring that the upper support part 1 is located above the pull plate 2.

[0037] A baffle 104 is fixed on one side of the slide 103. The baffle 104 can limit the slider 201. When the outermost slider 201 contacts the baffle 104, it indicates that the upper support part 1 and the pull plate 2 are in place.

[0038] like Figure 1As shown, the upper support 1 and the pull plate 2 are fixedly connected by a fixing assembly 3. The fixing assembly 3 includes a column 301 fixed to the top of the pull plate 2, and a fixing plate 302 fixed to one side of the upper support 1. The column 301 and the fixing plate 302 are connected by bolts 303. When the outermost slider 201 contacts the baffle 104, the fixing plate 302 will be located directly above the column 301. Both have matching threaded holes, so they can be fixed by bolts 303. This ensures that the device can stably support the heat exchange tube during transportation and prevents the upper support 1 and the pull plate 2 from being misaligned due to vibration during transportation.

[0039] like Figure 4 , Figure 5 and Figure 6 As shown, the device also includes a lower support part 4 disposed at the bottom of the pull plate 2. The lower support part 4 is a rectangular plate. Several second slots 401 are opened on the bottom surface of the lower support part 4. The first slot 101 and the second slot 401 are both arc-shaped and are used to engage the heat exchange tube. A limiting groove 402 is opened on the top surface of the lower support part 4. The pull plate 2 is slidably connected to the limiting groove 402.

[0040] like Figure 8 As shown, the lower support part 4 can be set on the top of the heat exchange tube through the second slot 401. At this time, the pull plate 2 will not contact the heat exchange tube, so pulling the pull plate 2 during disassembly will not cause wear to the heat exchange tube.

[0041] During disassembly of this device, a crane will first be used to lift the fluidized bed reactor to make the fluidized bed vertical before disassembling the support device. Therefore, it is only necessary to pull the pull plate 2 to slide the slider 201 into the receiving groove 102, so that the upper support part 1 and the pull plate 2 can be pulled out of the fluidized bed device together, and then the lower support part 4 can be removed.

[0042] Furthermore, when the fluidized bed reactor is lifted, the device will be fixed in place due to the friction generated by contact with the heat exchange tubes.

[0043] As attached Figure 9 As shown, when disassembling the three-layer structure (the upper support 1, the pull plate 2, and the lower support 4 form a three-layer structure), it is necessary to first use an auxiliary long plate with a width smaller than the pipe spacing, insert it into the pipe, place it below the device, fix it on both sides with ropes, and then pull the pull plate 2 to pull out the pull plate 2 and the upper support 1. At this time, the auxiliary long plate 5 will support the lower support 4 to prevent the lower support 4 from slipping and hitting the ribs of the heat exchange tube. Example 1

[0044] During installation, the appropriate structure should be selected according to the gap of the heat exchange tube bundle. When the gap is less than 40mm, a double-layer structure consisting of upper support 1 and pull plate 2 is adopted. When the gap is greater than or equal to 40mm, a three-layer structure consisting of upper support 1, pull plate 2 and lower support 4 is adopted.

[0045] Before installation, ensure that all components are properly connected. Slide the slider 201 at the top of the pull plate 2 along the groove 103 at the bottom of the upper support 1 until the outermost slider 201 contacts the baffle 104 on one side of the groove 103. At this point, the upper support 1 and the pull plate 2 are properly engaged. Then, fix it with the fixing assembly 3. Specifically, align the column 301 at the top of the pull plate 2 with the fixing plate 302 on one side of the upper support 1, and tighten it with bolts 303 through the threaded holes of both to prevent misalignment during installation.

[0046] During the installation of the double-layer structure, the first slot 101 at the top of the upper support 1 fits against the upper heat exchange tube. The arc-shaped design of the first slot 101 achieves precise positioning, ensuring that the spacing between the upper, lower, left, and right heat exchange tubes meets the design dimensions, while providing support for the upper heat exchange tubes. The tubes are then laid and installed layer by layer from bottom to top.

[0047] When installing the three-layer structure, first engage the lower heat exchange tube with the second slot 401 at the bottom of the lower support part 4, and slide the pull plate 2 into the limiting slot 402 at the top of the lower support part 4. Then, assemble the support part 1 and the pull plate 2 according to the installation steps of the two-layer structure. The setting of the lower support part 4 can prevent the pull plate 2 from directly contacting the heat exchange tube and reduce wear during subsequent disassembly. The entire installation process ensures that the heat exchange tube is successfully welded and fixed through slot positioning and component support. Example 2

[0048] Before transportation, the device needs to be reinforced to ensure that the heat exchange tubes are stably supported during transportation. In the double-layer structure, the upper support 1 and the pull plate 2 are thoroughly secured by bolts 303 of the fixing component 3 to prevent misalignment caused by transportation vibration.

[0049] The three-layer structure requires additional assurance of stable cooperation between the lower support part 4 and the pull plate 2. The lower support part 4 is tightly attached to the lower heat exchange tube through the second slot 401. The pull plate 2 is fixed in the limiting groove 402 and achieves self-fixation through friction. The entire device is completely attached to the surface of the upper and lower heat exchange tubes through the first slot 101 and the second slot 401, forming all-round support.

[0050] After being transported to its destination, the fluidized bed reactor is first lifted vertically by a crane in preparation for dismantling.

[0051] During disassembly, loosen the bolts 303 of the fixing component 3, pull the pull plate 2 to slide the top slider 201 into the receiving groove 102 at the bottom of the upper support part 1. At this time, the overall height of the upper support part 1 and the pull plate 2 is less than the gap between the heat exchange tubes, so both can be pulled out together from the gap between the heat exchange tubes. For the double-layer structure, simply pull out the upper support part 1 and the pull plate 2. For the triple-layer structure, after pulling out the upper support part 1 and the pull plate 2, adjust the lower support part 4 to disengage the second slot 401 from the heat exchange tube, and finally smoothly remove the lower support part 4. The entire transportation support and disassembly process avoids wear or deformation of the heat exchange tubes. Example 3

[0052] In practical applications, the weight of the heat exchange tubes must also be considered. For the support frame, it's necessary to calculate its feasibility to ensure that it can provide sufficient support to prevent deformation due to the weight of the heat exchange tubes during actual production.

[0053] Based on actual production conditions, the heat exchange tubes are made of stainless steel. Stainless steel density ρ: 8000 kg / m³ (common industry value) Number of pipes: 840 Outer diameter (OD): 48.3 mm = 0.0483 m Pipe wall thickness (T): 5mm = 0.005m Pipe length (L): 11m Inner diameter (ID) = OD - 2 × T = 0.0483 m - 2 × 0.005 m = 0.0383 m The weight of a single pipe is calculated as follows: V × ρ = A × L × ρ = π / 4 × (OD² - ID²) × L × ρ ≈ 59.84 kg. Total weight = weight of a single piece × number of pieces = 59.84 kg / piece × 840 pieces ≈ 50,265.6 kg The total weight of these heat exchange tubes is approximately 50,266 kg (about 50.27 tons). The support device is made of Q235 steel (common structural steel), and the allowable compressive stress is 200MPa (a conservative value based on yield strength and safety factor). Total load capacity: weight = 50,266 kg × 9.8 m / s² ≈ 492,606.8 N.

[0054] Allowable compressive stress σ allow =200MPa=200×10 6 Pa.

[0055] Minimum contact area A min =Total load / σ allow =492,606.8 / 200×10 6≈0.002463m²=2463mm².

[0056] Since the upper support part 1 of the device is directly attached to the heat exchange tube, it is only necessary to ensure that the top support surface area of ​​the slider 201 of the pull plate 2 is greater than 2463mm² to ensure that the device can provide sufficient support for the heat exchange tube.

[0057] The slider 201 of the pull plate designed in this device is 30mm long and 50mm wide. The area of ​​a single slider 201 is close to 1500mm² (the actual area will be slightly smaller due to the rounded corners at the top). In the laying of pipes, the number of pipes at the bottom is much greater than two. Therefore, the pull plate 2 can provide sufficient support.

[0058] During actual installation, to ensure uniform stress on the pipes, at least two of these devices should be installed on each layer. This ensures that the pipe installation position does not shift and provides sufficient support to complete the remaining pipe laying.

[0059] The above design is for a two-layer structure used when the tube bundle gap is small (<40mm). When the tube bundle gap is greater than or equal to 40mm, a three-layer design can be adopted. When the device adopts a three-layer design, the upper support part 1, which serves as the support device, has the same function as the two-layer design structure, with only a slight change in height to accommodate the different tube gaps. Therefore, the area of ​​the support surface with the heat exchange tubes remains unchanged. Thus, the stability of the device can still be guaranteed when using a three-layer structure.

[0060] Working Principle: During the installation and welding stage, this device is first installed below the bottom heat exchange tube. The double-layer structure consists of an upper support 1 and a pull plate 2, while the triple-layer structure adds a lower support 4. The first slot 101 at the top of the upper support 1 and the second slot 401 at the bottom of the lower support 4 in the triple-layer structure are arc-shaped, precisely engaging the corresponding heat exchange tubes to achieve lateral positioning and ensure that the spacing between the heat exchange tubes meets the design dimensions. Simultaneously, the slider 201 at the top of the pull plate 2 cooperates with the sliding groove 103 at the bottom of the upper support 1. After being limited by the baffle 104, it is secured by the column 301, fixing plate 302, and bolts 303 of the fixing component 3, forming a stable support structure that provides vertical support for the heat exchange tubes to be installed above and achieves vertical positioning. After the bottom heat exchange tube is welded and fixed, this device is repeatedly installed on top of it, and the next layer of heat exchange tubes is installed according to the same logic, and so on, completing the welding and assembly of the entire heat exchange tube bundle layer by layer upwards. During transportation, the device is tightly fitted to the heat exchange tubes through the slots, and the fixing component 3 reinforces the connection of each component to avoid misalignment caused by transportation vibration, providing stable support for the tube bundle throughout the process. After arriving at the destination, the fluidized bed is lifted vertically, the bolts 303 are loosened, and the pull plate 2 is pulled to make the slider 201 slide into the receiving groove 102 of the upper support part 1, reducing the overall height of the device. Then, the components are extracted according to the corresponding steps of the double-layer / triple-layer structure to complete the non-destructive disassembly.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fluidized bed heat exchanger tube support device, comprising an upper support part (1) and a pull plate (2), wherein the top surface of the upper support part (1) is provided with a plurality of first slots (101), characterized in that: The top of the pull plate (2) is slidably connected to the upper support part (1) by a number of sliders (201), and the bottom of the upper support part (1) has a number of receiving grooves (102) that match the sliders (201).

2. The fluidized bed heat exchanger tube support device according to claim 1, characterized in that: Several sliders (201) are fixed to the top of the pull plate (2), and a groove (103) is provided at the bottom of the upper support (1). The sliders (201) are slidably connected in the groove (103).

3. The fluidized bed heat exchanger tube support device according to claim 2, characterized in that: A baffle (104) is fixed on one side of the slide (103).

4. The fluidized bed heat exchanger tube support device according to claim 1, characterized in that: The upper support (1) and the pull plate (2) are fixedly connected by a fixing component (3).

5. A fluidized bed heat exchanger tube support device according to claim 4, characterized in that: The fixing component (3) includes a column (301) fixed to the top of the pull plate (2), and a fixing plate (302) is fixed on one side of the upper support (1). The column (301) and the fixing plate (302) are connected by bolts (303).

6. A fluidized bed heat exchanger tube support device according to claim 1, characterized in that: Several sliders (201) are evenly arranged along the length of the pull plate (2).

7. A fluidized bed heat exchanger tube support device according to claim 1, characterized in that: The positions of the first card slot (101) and the receiving slot (102) are offset.

8. A fluidized bed heat exchanger tube support device according to any one of claims 1-7, characterized in that: It also includes a lower support part (4) located at the bottom of the pull plate (2), and the bottom surface of the lower support part (4) is provided with a plurality of second slots (401).

9. A fluidized bed heat exchanger tube support device according to claim 8, characterized in that: The lower support (4) has a limiting groove (402) on its top surface, and the pull plate (2) is slidably connected to the limiting groove (402).

10. A fluidized bed heat exchanger tube support device according to claim 8, characterized in that: Both the first card slot (101) and the second card slot (401) are arc-shaped.

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