Splicing type baffle plate structure for coiled pipe high-pressure heater tube bundle

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly relates to a splicing type baffle plate structure for a coiled pipe high-pressure heater tube bundle. The utility model provides a splicing type baffle plate structure for a coiled pipe high-pressure heater tube bundle. The heater subcooling section pipe comprises heater subcooling section pipes, and is characterized in that fins are arranged on straight pipe section parts of the heater subcooling section pipes, the straight pipe section parts of the heater subcooling section pipes are arranged in a matrix mode, butt joint faces are arranged between the fins on the straight pipe section parts of the adjacent heater subcooling section pipes, and the butt joint faces are connected with the fins on the straight pipe section parts of the adjacent heater subcooling section pipes. The fins in the same horizontal row or the same vertical row are spliced to form a fin plate, and the fin plates are mutually combined to form a plate structure; and the fins in the same horizontal row are connected together through a horizontal connecting plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and particularly relates to a splicing type baffle structure for a serpentine tube high-pressure heater tube bundle. Background Art

[0002] At present, the types of heat exchanger baffles include segmental baffles, disc - annular baffles, arc-shaped baffles, strip-shaped baffles, helical baffles, etc. Based on the most common heat exchanger types in the market, shell-and-tube heat exchangers and U-tube heat exchangers, segmental baffles are the most commonly used baffles.

[0003] As Figure 8 shown, for a serpentine tube high-pressure heater (a boiler auxiliary), its heat exchange tube bundle 9 is a serpentine tube. The structural feature of the serpentine tube is its bent shape, which consists of multiple arc segments and straight segments, with diverse and complex shapes. Based on the structural features of the serpentine tube, the above-mentioned types of baffles cannot be directly installed on the straight segment part of the serpentine tube. Therefore, all serpentine tube heaters on the market currently do not have baffles, but instead are designed with shock-absorbing partitions laid flat on each layer of serpentine tubes. However, the shock-absorbing partitions do not play a baffle role. With the increase in unit capacity, the serpentine tube heater can only meet the heat exchange requirements by increasing the number and length of serpentine tubes. Therefore, adding a baffle in the desuperheating section of the serpentine tube heater can greatly improve the heat exchange efficiency of the serpentine tube high-pressure heater, thereby reducing the structural manufacturing cost. Summary of the Utility Model

[0004] The utility model aims at the above problems and provides a splicing type baffle structure for a serpentine tube high-pressure heater tube bundle.

[0005] To achieve the above object, the utility model adopts the following technical solutions. The utility model includes a heater desuperheating section tube, characterized in that fins are arranged on the straight tube section part of the heater desuperheating section tube. The straight tube section parts of each heater desuperheating section tube are arranged in a matrix. There is a docking surface between the fins on the straight tube section parts of adjacent heater desuperheating section tubes. The fins in the same horizontal row or the same vertical row are spliced into a strip fin plate, and each fin plate is combined with each other to form a plate structure; the fins in the same horizontal row are connected together by a horizontal connecting plate.

[0006] As a preferred solution, the heater desuperheating section tube of the utility model is welded to the fins.

[0007] As another preferred solution, the horizontal connecting plate of the utility model adopts a flat steel bar.

[0008] As another preferred solution, the fins of the utility model are welded to the horizontal connecting plate.

[0009] As another preferred embodiment, the fins of the present utility model adopt cross-shaped fins. An overflow hole is provided at the center of the cross-shaped fins. An inwardly concave arc-shaped transition edge is formed between adjacent ends of the cross-shaped fins; the inwardly concave arc-shaped transition edge corresponds to one-fourth of the outer wall contour of the straight pipe section of the heater cold-discharge section pipe; the end of the cross-shaped fin is a flat butt joint surface.

[0010] As another preferred embodiment, the fins of the present utility model adopt double cross-shaped fins arranged vertically. An overflow hole is provided at the center of each cross-shaped fin of the double cross-shaped fins; an inwardly concave arc-shaped transition edge is formed between adjacent ends of each cross-shaped fin, and the inwardly concave arc-shaped transition edge corresponds to one-fourth of the outer wall contour of the straight pipe section of the heater cold-discharge section pipe; the end of each cross-shaped fin is a flat butt joint surface.

[0011] As another preferred embodiment, the fins of the present utility model adopt cross-shaped fins. The upper end of the cross-shaped fins is a horizontal rectangular fin, and the lower end of the cross-shaped fins is a cross-shaped fin. An inwardly concave arc-shaped transition edge is formed between the rectangular fin and the cross-shaped fin. An overflow hole is provided at the center of the cross-shaped fin, and an inwardly concave arc-shaped transition edge is formed between adjacent ends of the cross-shaped fin; the inwardly concave arc-shaped transition edge corresponds to one-fourth of the outer wall contour of the straight pipe section of the heater cold-discharge section pipe; the end of the cross-shaped fin is a flat butt joint surface.

[0012] Secondly, an overflow groove is provided at the connection end of the transverse connecting plate and the fin corresponding to the overflow hole; the connection end of the transverse connecting plate and the fin is located on the connection line of the overflow holes in the same horizontal row, and the transverse connecting plate is horizontally arranged.

[0013] In addition, the overflow groove of the present utility model is a semi-circular overflow groove, and the width of the overflow groove is greater than the width of the overflow hole.

[0014] Advantages of the present utility model.

[0015] The fin plates of the present utility model are combined with each other to form a plate structure. The fins in the same horizontal row are connected together by a transverse connecting plate, so that all the fins become an integral body and are assembled into a whole baffle plate. This plate plays a baffle role for the heat exchange fluid, improves the overall heat exchange efficiency of the serpentine tube high-pressure heater, and reduces the manufacturing cost of the serpentine tube high-pressure heater. The assembled baffle plate not only plays a baffle role, but also plays a certain role in fixing and damping the heat exchange tube bundle due to the adoption of the fin assembly and transverse connecting plate connection method, which is tightly penetrated into the gap position of the serpentine tube. Description of the drawings

[0016] The following further describes the present utility model in conjunction with the drawings and specific embodiments. The protection scope of the present utility model is not limited only to the description of the following content.

[0017] Figure 1Schematic structural diagram of the present utility model;

[0018] Figure 2 Schematic structural diagram of the cross-shaped fin structure of the present utility model.

[0019] Figure 3 Schematic structural diagram of the double cross-shaped fin structure of the present utility model.

[0020] Figure 4 Schematic structural diagram of the cross-shaped fin structure of the present utility model.

[0021] Figure 5 Schematic structural diagram of the horizontal connecting plate of the present utility model.

[0022] Figure 6 Schematic structural diagram of the combined plate structure of the present utility model.

[0023] Figure 7 is Figure 6 Enlarged view of part A of

[0024] Figure 8 Schematic diagram of the installation position of the present utility model.

[0025] In the figure, 1 is the overflow hole, 2 is the cross-shaped fin, 3 is the double cross-shaped fin, 4 is the cross-shaped fin, 5 is the horizontal connecting plate, 6 is the overflow groove, 7 is the plate structure, 8 is the peripheral flat steel bar, 9 is the heat exchange tube bundle, 10 is the concave arc transition edge, 11 is the flat butt joint surface, and 12 is the rectangular fin. Specific implementation mode

[0026] As Figure 1 shown, the present utility model includes the heater desuperheating section pipe. Fins are provided on the straight pipe section of the heater desuperheating section pipe. The straight pipe sections of each heater desuperheating section pipe are arranged in a matrix. There is a butt joint surface between the fins on the straight pipe sections of adjacent heater desuperheating section pipes. The fins in the same horizontal row or the same vertical row are joined together to form a block fin plate, and each fin plate is combined with each other to form a plate structure 7; the fins in the same horizontal row are connected together by a horizontal connecting plate 5.

[0027] The heater desuperheating section pipe is welded to the fin.

[0028] The horizontal connecting plate 5 is made of a flat steel bar.

[0029] The fin is welded to the horizontal connecting plate 5.

[0030] As Figure 2As shown, the fin adopts a cross-shaped fin 2. An overflow hole 1 is arranged at the center of the cross-shaped fin 2. An inward concave arc transition edge 10 is formed between adjacent ends of the cross-shaped fin 2; the inward concave arc transition edge 10 corresponds to one-fourth of the outer wall contour of the straight pipe section of the heater cold-dissipating section pipe; the end of the cross-shaped fin 2 is a flat butt joint surface 11.

[0031] As Figure 3 shown, the fin adopts a double cross-shaped fin 3 arranged vertically. An overflow hole 1 is arranged at the center of each cross-shaped fin of the double cross-shaped fin 3; an inward concave arc transition edge is formed between adjacent ends of each cross-shaped fin, and the inward concave arc transition edge corresponds to one-fourth of the outer wall contour of the straight pipe section of the heater cold-dissipating section pipe; the end of each cross-shaped fin is a flat butt joint surface.

[0032] As Figure 4 shown, the fin adopts a cross-shaped fin 4. The upper end of the cross-shaped fin 4 is a horizontal rectangular fin 12, and the lower end of the cross-shaped fin 4 is a cross-shaped fin. An inward concave arc transition edge is formed between the rectangular fin 12 and the cross-shaped fin. An overflow hole 1 is arranged at the center of the cross-shaped fin. An inward concave arc transition edge is formed between adjacent ends of the cross-shaped fin; the inward concave arc transition edge corresponds to one-fourth of the outer wall contour of the straight pipe section of the heater cold-dissipating section pipe; the end of the cross-shaped fin is a flat butt joint surface. Two types of cross-shaped fins 4 can be set, and the widths of the rectangular fins 12 of the two types of cross-shaped fins 4 are different and are arranged according to needs.

[0033] As Figure 7 shown, during the assembly process of the assembled baffle structure, three forms of fins are selected and placed at appropriate positions according to needs. The double cross-shaped fin 3 is located at the middle position and the edge position of the assembled baffle, and the cross-shaped fin 2 and the cross-shaped fin 4 are located at the edge position of the assembled baffle.

[0034] The connection end of the horizontal connecting plate 5 and the fin is provided with an overflow groove 6 corresponding to the overflow hole 1; the connection end of the horizontal connecting plate 5 and the fin is located on the connection line of each overflow hole 1 in the same horizontal row, and the horizontal connecting plate 5 is horizontally arranged.

[0035] The overflow groove 6 is arranged to prevent the horizontal connecting plate 5 from blocking the overflow hole 1 of the fin.

[0036] As Figure 1 shown, after the horizontally arranged horizontal connecting plate 5 is connected to the fin, a structure with a T-shaped cross-section is formed, further improving the fixing and shock absorption effects.

[0037] The overflow groove 6 is a semi-circular overflow groove, and the width of the overflow groove 6 is greater than the width of the overflow hole 1.

[0038] A baffle plate is arranged in the straight pipe section of the desuperheating section of the serpentine high-pressure heater. Before the serpentine pipe is welded to the header, the fins of the present utility model are welded to the corresponding position of the serpentine pipe. After each layer of the serpentine pipe is welded to the header, the fins are assembled into a strip, and then a flat steel bar is used for auxiliary connection (welding). After all layers of the serpentine pipes are welded to the header, the strips assembled by the fins are assembled into a plate, and the periphery is auxiliary-connected (welded) with the peripheral flat steel bar 8, thereby forming a built-up baffle plate similar to an arc-shaped baffle plate, which not only plays a role in deflecting the flow but also plays a role in shock absorption.

[0039] It can be understood that the above specific description of the present utility model is only for explaining the present utility model and is not limited to the technical solutions described in the embodiments of the present utility model. Those of ordinary skill in the art should understand that the present utility model can still be modified or equivalently replaced to achieve the same technical effect; as long as the use requirements are met, they are all within the protection scope of the present utility model.

Claims

1. A spliced ​​baffle structure for a serpentine tube high-pressure heater bundle, comprising a heater cooling section tube, characterized in that The straight tube section of the heater cooling section tube is provided with fins, and the straight tube section of each heater cooling section tube is arranged in a matrix. There are docking surfaces between the fins on the straight tube sections of adjacent heater cooling section tubes. The fins in the same horizontal row or the same vertical row are assembled into a block fin plate, and the fin plates are combined with each other into a plate structure; the fins in the same horizontal row are connected together by a horizontal connecting plate.

2. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 1, characterized in that The cooling section tube of the heater is welded to the fins.

3. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 1, characterized in that The transverse connecting plate is made of flat steel bars.

4. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 1, characterized in that The fins are welded to the transverse connecting plates.

5. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 1, characterized in that The fins are cross-shaped fins, with an overflow hole in the center of the cross-shaped fins, and an inwardly concave arc transition edge between adjacent ends of the cross-shaped fins; the inwardly concave arc transition edge corresponds to one quarter of the outer wall contour of the straight tube section of the heater cooling section tube; the ends of the cross-shaped fins are straight butt surfaces.

6. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 1, characterized in that The fins are double cross-shaped fins arranged vertically, and an overflow hole is provided in the center of each cross-shaped fin of the double cross-shaped fins; an inwardly concave arc transition edge is provided between adjacent ends of each cross-shaped fin, and the inwardly concave arc transition edge corresponds to one quarter of the outer wall contour of the straight tube section of the heater cooling section tube; and each end of the cross-shaped fin is a straight butt joint surface.

7. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 1, characterized in that The fins are of the shape of a zigzag flower, the upper end of the zigzag flower fin is a transverse rectangular fin, the lower end of the zigzag flower fin is a cross-shaped fin, there is a concave arc transition edge between the rectangular fin and the cross-shaped fin, an overflow hole is provided in the center of the cross-shaped fin, there is a concave arc transition edge between adjacent ends of the cross-shaped fin; the concave arc transition edge corresponds to one quarter of the outer wall contour of the straight tube section of the heater cooling section; the end of the cross-shaped fin is a straight butt joint surface.

8. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 1, characterized in that The connecting end of the transverse connecting plate and the fin is provided with an overflow groove corresponding to the overflow hole on the fin; the connecting end of the transverse connecting plate and the fin is located on the connecting line of the overflow holes in the same horizontal row, and the transverse connecting plate is arranged horizontally.

9. The assembled baffle structure for a serpentine tube high pressure heater tube bundle according to claim 8, characterized in that The overflow groove is a semicircular overflow groove, and the width of the overflow groove is greater than the width of the overflow hole.

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