Heat exchanger with spiral flow guide structure

Abstract

The utility model relates to a spiral diversion structure heat exchanger and belongs to the technical field of heat exchangers. A shell pass flow channel is formed in the shell pass cylinder and used for heat exchange between fluid and a tube pass; the pipe spacer is arranged in the shell pass cylinder; the connecting pipe is arranged at the top of one end of the shell pass cylinder and is communicated with the shell pass cylinder; each flow guide unit is composed of a supporting pipe and a spiral flow deflector, the spiral flow deflectors are fixed to the surfaces of the supporting pipes in an outward-downward inclined mode, and the flow guide units are arranged in the connecting pipes; one end of the connecting plate is connected with the supporting pipe, and the other end of the connecting plate is connected with the inner wall of the connecting pipe; and the bottom plate is used for connecting the flow guide unit with the pipe spacer. The utility model solves the problem of local retention of high-viscosity fluid at the inlet due to viscous force accumulation, improves the heat transfer efficiency, and improves the stability of equipment.

Description

Technical Field

[0001] This utility model relates to a spiral flow guiding structure heat exchanger, belonging to the field of heat exchanger technology. Background Technology

[0002] Shell-and-tube heat exchangers are devices used to transfer heat between fluids at different temperatures, and are widely used in energy, chemical, petroleum, refrigeration, and food processing industries. However, high-viscosity fluids in traditional heat exchangers are prone to problems such as uneven flow, boundary layer thickening, and reduced heat transfer coefficients. These problems not only affect heat transfer efficiency but may also lead to local stagnation, adsorption of impurities to form a fouling layer, further reducing heat transfer efficiency and affecting the stability of the equipment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a spiral flow guiding structure heat exchanger, which solves the problem of local stagnation of high viscosity fluid at the inlet due to viscosity force accumulation, improves heat transfer efficiency and improves equipment stability.

[0004] The present invention relates to a spiral flow guiding structure heat exchanger, comprising:

[0005] The shell-side cylinder has internal shell-side flow channels for heat exchange between the fluid and the tube side.

[0006] A spacer tube is installed inside the shell-side cylinder;

[0007] The connecting pipe is placed at the top of one end of the shell-side cylinder and is configured to penetrate the shell-side cylinder.

[0008] At least one flow guiding unit consisting of a support tube and a spiral guide vane, wherein the spiral guide vane is fixed to the surface of the support tube at an outward and downward angle, and the flow guiding unit is placed inside the tube;

[0009] The connecting plate is used to connect the flow guiding unit to the pipe. One end of the connecting plate is connected to the support pipe, and the other end is connected to the inner wall of the pipe.

[0010] The base plate is used to connect the flow guiding unit to the spacer tube.

[0011] A conical transition cylinder is installed on the inner wall of the shell-side cylinder corresponding to the nozzle. The diameter of the conical transition cylinder on the side closer to the shell-side cylinder is smaller than the diameter on the side farther from the shell-side cylinder. This conical transition cylinder design allows the fluid to smoothly transition from the nozzle into the shell-side flow channel. This smooth transition reduces the impact and turbulence when the fluid enters the shell side, reduces kinetic energy loss, and improves fluid flow efficiency. Because the diameter of the conical transition cylinder gradually increases from the side closer to the shell-side cylinder to the side farther from the shell-side cylinder, the fluid can be more evenly distributed upon entering the shell side, reducing the formation of eddies. Eddies cause uneven fluid flow, increase flow resistance, and reduce heat transfer efficiency. By reducing eddies, the conical transition cylinder can improve the uniformity of fluid flow and heat transfer efficiency.

[0012] The support pipes are all welded to the spiral guide vanes, connecting plates, and base plates. Welding is a high-strength connection method that ensures a firm and reliable connection between the support pipes, spiral guide vanes, connecting plates, and base plates. This robust connection effectively prevents components from loosening or shifting during fluid impact or equipment operation, thereby improving the stability of the entire structure.

[0013] The aforementioned nozzle is welded to the shell-side cylinder. This welded connection provides extremely high sealing performance, effectively preventing fluid leakage from the connection between the nozzle and the shell-side cylinder. This is particularly important for heat exchangers handling high-pressure, high-temperature, or toxic / hazardous fluids, ensuring safe operation and preventing safety accidents or environmental pollution caused by leaks.

[0014] The conical transition cylinder is welded to the inner wall of the shell-side cylinder. This welded connection ensures a strong and reliable bond between the conical transition cylinder and the inner wall of the shell-side cylinder. This robust connection effectively prevents the conical transition cylinder from loosening or shifting during fluid impact or equipment operation, thereby improving the overall structural stability.

[0015] The connecting plate and the connecting pipe are welded together. This welding connection ensures a strong and reliable connection between the connecting plate and the connecting pipe. This robust connection effectively prevents the connecting plate from loosening or shifting during fluid impact or equipment operation, thereby improving the stability of the entire structure.

[0016] The described flow guiding units are multiple and arranged in series along the axial direction of the shell-side cylinder, with the helical guide vanes of adjacent flow guiding units rotating in opposite directions. This multi-stage arrangement of multiple flow guiding units along the axial direction enables multi-stage guidance of the fluid, resulting in a continuous and stable helical flow within the shell side. This multi-stage guidance effectively reduces fluid turbulence and eddies, optimizes the fluid flow path, and improves fluid flow efficiency. The opposite rotation of the helical guide vanes in adjacent flow guiding units effectively reduces fluid backflow between adjacent units. Backflow leads to uneven fluid flow, increases flow resistance, and reduces heat transfer efficiency. By reducing backflow, the fluid flow path can be further optimized, improving heat transfer efficiency.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] The spiral guide vanes are fixed to the support tube surface at an outward and downward angle, effectively changing the flow direction of the fluid and causing it to flow in a spiral pattern as it enters the shell-side channel. This flow pattern reduces the retention of high-viscosity fluids at the inlet, avoiding localized accumulation due to viscous forces. The spiral guide vane design also increases radial mixing of the fluid, resulting in a more uniform distribution within the shell-side channel. This uniform flow helps improve heat transfer efficiency and avoids localized overheating or undercooling caused by uneven fluid distribution. Furthermore, the design is simple, easy to manufacture, and possesses high versatility and adaptability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of this utility model.

[0020] In the diagram: 1. Conical transition cylinder; 2. Spiral guide vane; 3. Support tube; 4. Connecting plate; 5. Connecting pipe; 6. Base plate; 7. Spacing tube; 8. Shell-side cylinder; 9. Liquid inlet; 10. Liquid outlet. Detailed Implementation

[0021] The present invention will be further described below with reference to embodiments:

[0022] Example 1

[0023] like Figure 1 As shown, the spiral flow guiding structure heat exchanger of this utility model includes...

[0024] The shell-side cylinder 8 has an internal shell-side flow channel for heat exchange between the fluid and the tube side.

[0025] The spacer tube 7 is installed inside the shell-side cylinder 8;

[0026] Connector 5 is placed at the top of one end of shell-side cylinder 8 and is connected to shell-side cylinder 8.

[0027] At least one flow guiding unit consisting of a support tube 3 and a spiral guide vane 2, wherein the spiral guide vane 2 is fixed to the surface of the support tube 3 at an outward and downward angle, and the flow guiding unit is placed inside the tube 5;

[0028] The connecting plate 4 is used to connect the flow guiding unit to the pipe 5. One end of the connecting plate 4 is connected to the support pipe 3, and the other end is connected to the inner wall of the pipe 5.

[0029] The base plate 6 is used to connect the bottom of the support tube 3 in the flow guiding unit to the spacer tube 7.

[0030] A conical transition cylinder 1 is provided on the inner wall of the shell-side cylinder 8 corresponding to the connecting pipe 5. The diameter of the conical transition cylinder 1 on the side closer to the shell-side cylinder 8 is smaller than the diameter on the side farther away from the shell-side cylinder 8.

[0031] The support pipe 3 is welded to the spiral guide vane 2, the connecting plate 4 and the base plate 6.

[0032] The nozzle 5 is welded to the shell-side cylinder 8.

[0033] The conical transition cylinder 1 is welded to the inner wall of the shell-side cylinder 8.

[0034] The connecting plate 4 is welded to the pipe 5.

[0035] Working process: Fluid enters the connecting pipe 5 through the inlet 9 from the external pipe. The flow direction of the fluid is changed by the spiral guide vane 2, causing the fluid to flow in a spiral shape. Then it enters the shell-side cylinder 8. After heat exchange, the fluid continues to flow along the shell-side flow channel and finally flows out from the outlet 10. The outlet 10 is located at the bottom of the other end of the shell-side cylinder 8 to ensure that the fluid flows fully within the shell side and completes the heat exchange process.

[0036] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A spiral flow-guiding heat exchanger, characterized in that, include The shell-side cylinder (8) has a shell-side flow channel inside, which is used for heat exchange between the fluid and the tube side; A spacer tube (7) is installed inside the shell-side cylinder (8); The connecting pipe (5) is placed at the top of one end of the shell-side cylinder (8) and is connected to the shell-side cylinder (8); At least one flow guiding unit consisting of a support tube (3) and a spiral guide vane (2), the spiral guide vane (2) is fixed to the surface of the support tube (3) at an outward and downward angle, and the flow guiding unit is placed inside the pipe (5); The connecting plate (4) is used to connect the flow guiding unit to the pipe (5). One end of the connecting plate (4) is connected to the support pipe (3), and the other end is connected to the inner wall of the pipe (5). The base plate (6) is used to connect the flow guiding unit to the spacer tube (7).

2. The spiral flow-guiding structure heat exchanger according to claim 1, characterized in that, A conical transition cylinder (1) is provided on the inner wall of the shell-side cylinder (8) corresponding to the connecting pipe (5). The diameter of the conical transition cylinder (1) on the side closer to the shell-side cylinder (8) is smaller than the diameter on the side farther away from the shell-side cylinder (8).

3. The spiral flow-guiding structure heat exchanger according to claim 2, characterized in that, The support tube (3) is welded to the spiral guide plate (2), the connecting plate (4) and the base plate (6).

4. The spiral flow-guiding structure heat exchanger according to claim 3, characterized in that, The nozzle (5) is welded to the shell-side cylinder (8).

5. The spiral flow-guiding structure heat exchanger according to claim 4, characterized in that, The conical transition cylinder (1) is welded to the inner wall of the shell-side cylinder (8).

6. The spiral flow-guiding structure heat exchanger according to claim 5, characterized in that, The connecting plate (4) is welded to the pipe (5).

7. The spiral flow-guiding structure heat exchanger according to any one of claims 1-6, characterized in that, The flow guiding units are multiple and arranged in series along the axial direction of the shell-side cylinder (8), and the spiral guide vanes (2) of adjacent flow guiding units rotate in opposite directions.

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