Counter-flow type spiral shell and tube heat exchanger

Abstract

The utility model provides a reverse flow type spiral shell and tube heat exchanger. The reverse flow type spiral shell and tube heat exchanger comprises an outer shell, a heat exchange core and a center shaft. A regeneration solution or a dehumidification solution enters the outer shell from the liquid inlet and is discharged from the liquid outlet, the dehumidification solution or the regeneration solution enters the heat exchange core from the liquid inlet pipe and is discharged from the liquid outlet pipe, and the flow direction of the dehumidification solution or the regeneration solution entering the heat exchange core is opposite to the flow direction of the regeneration solution or the dehumidification solution entering the outer shell. The heat transfer efficiency is improved in a reverse flow mode of the inner pipe and the outer pipe, the spiral flow guide ribs arranged on the center shaft play a flow guide role, liquid turbulent flow is increased, then the heat exchange efficiency is further improved, solution reverse flow efficient heat exchange can be achieved, cost is low, and batch production is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of heat exchangers, and in particular to a counter-flow spiral shell and tube heat exchanger. Background Technology

[0002] In solution dehumidifiers, the heat exchange between the regenerated solution and the dehumidified solution is mostly achieved by using the mechanical energy of the heat exchanger. However, traditional heat exchangers have a simple fluid flow state and low turbulence intensity, which limits the heat transfer coefficient. This makes it difficult to meet the requirements for efficient heat exchange, especially under conditions with small temperature differences. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the aforementioned problems in the prior art, this utility model provides a counter-flow spiral shell-and-tube heat exchanger.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A counter-flow spiral shell-and-tube heat exchanger, comprising an outer shell, a heat exchange core, and a central shaft;

[0008] The outer shell has a columnar heat exchange cavity inside, and the surface of the outer shell is also provided with a liquid inlet and a liquid outlet.

[0009] The central shaft is installed inside the heat exchange cavity, and the surface of the central shaft is provided with spiral guide ribs;

[0010] The heat exchange core includes a spiral coil and an inlet pipe and an outlet pipe connected to the two ends of the spiral coil, respectively. The inlet pipe and the outlet pipe extend out of the outer shell. The spiral coil is sleeved on the central shaft, and the spiral direction of the spiral coil is opposite to the spiral direction of the spiral guide rib.

[0011] Preferably, it further includes a flow equalization plate and a limiting retaining ring. The limiting retaining ring is installed at one end of the central shaft and fixedly mounted on the flow equalization plate. The flow equalization plate is installed inside the heat exchange cavity and divides the top and bottom spaces of the heat exchange cavity into flow equalization chambers. The flow equalization plate has a plurality of first flow equalization holes. The surface of the limiting retaining ring has a plurality of second flow equalization holes at equal intervals along the circumference. The flow equalization plate has a third flow equalization hole corresponding to the second flow equalization holes.

[0012] Preferably, the outer shell includes a pair of half-shells, which are assembled by flange connection and sealed with a silicone sealing ring.

[0013] Preferably, the spiral coil is made of one of titanium, 254SMO stainless steel, B30 white copper, or 904L stainless steel.

[0014] Preferably, it also includes a base, the longitudinal section of which is L-shaped, and the base is fixed to the outer shell by bolts.

[0015] Preferably, the central shaft is made of PP plastic and is integrally injection molded. The central shaft includes a central tube and connecting tubes disposed at both ends of the central tube. The diameter of the central tube is larger than that of the connecting tubes, and the spiral guide ribs are disposed on the surface of the central tube.

[0016] Preferably, the flow equalization plate and the limiting ring are both made of PP plastic sheet material.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this utility model are as follows: Using the above technical solution, the regenerated solution or dehumidifying solution enters the outer shell from the liquid inlet and exits from the liquid outlet. The dehumidifying solution or regenerated solution enters the heat exchange core from the liquid inlet pipe and exits from the liquid outlet pipe. Furthermore, the flow direction of the dehumidifying solution or regenerated solution entering the heat exchange core is opposite to that of the regenerated solution or dehumidifying solution entering the outer shell. This counter-current flow of the inner and outer pipes improves heat transfer efficiency. The spiral guide ribs on the central shaft also act as guides, increasing liquid turbulence and further improving heat exchange efficiency. This application achieves efficient counter-current heat exchange with low cost, facilitating mass production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a counter-flow spiral shell-and-tube heat exchanger.

[0020] Figure 2 This is a schematic diagram of the internal structure of a counter-flow spiral shell-and-tube heat exchanger.

[0021] Figure 3 A schematic diagram of the structure with the central axis;

[0022] Figure 4 This is a schematic diagram of the flow equalization plate and the limiting retaining ring;

[0023] Figure 5 This is a schematic diagram of the heat exchange core structure;

[0024] Figure 6 This is a schematic diagram of the semi-shell structure;

[0025] Figure 7 This is a schematic diagram of the base structure.

[0026] [Explanation of Labels in the Attached Image]

[0027] 1. Outer shell;

[0028] 11. Liquid inlet; 12. Liquid outlet;

[0029] 2. Central axis;

[0030] 21. Central tube body; 22. Connecting tube body; 23. Spiral guide ribs;

[0031] 3. Heat exchange core;

[0032] 31. Spiral coil; 32. Inlet pipe; 33. Outlet pipe;

[0033] 4. Flow equalization plate;

[0034] 5. Limiting ring;

[0035] 6. Base;

[0036] 7. Silicone sealing ring. Detailed Implementation

[0037] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Please refer to Figures 1 to 7 This utility model provides a counter-flow spiral shell and tube heat exchanger, comprising an outer shell 1, a heat exchange core 3, and a central shaft 2;

[0039] The outer shell 1 has a columnar heat exchange cavity inside, and the surface of the outer shell 1 is also provided with a liquid inlet 11 and a liquid outlet 12.

[0040] The central shaft 2 is installed inside the heat exchange cavity, and the surface of the central shaft 2 is provided with spiral guide ribs 23;

[0041] The heat exchange core 3 includes a spiral coil 31 and an inlet pipe 32 and an outlet pipe 33 connected to the beginning and end of the spiral coil 31, respectively. The inlet pipe 32 and the outlet pipe 33 extend out of the outer shell 1. The spiral coil 31 is sleeved on the central shaft 2, and the spiral direction of the spiral coil 31 is opposite to the spiral direction of the spiral guide rib 23.

[0042] In use, the regenerated solution or dehumidifying solution enters the outer shell 1 from the liquid inlet 11 and exits from the liquid outlet 12. The dehumidifying solution or regenerated solution enters the heat exchange core 3 from the liquid inlet pipe 32 and exits from the liquid outlet pipe 33. The flow direction of the dehumidifying solution or regenerated solution into the heat exchange core 3 is opposite to that of the regenerated solution or dehumidifying solution into the outer shell 1. The heat transfer efficiency is improved by the countercurrent flow of the inner and outer pipes. Furthermore, the spiral guide ribs 23 set on the central shaft 2 play a guiding role, increasing liquid turbulence and further improving heat exchange efficiency. This application can achieve efficient heat exchange of solution countercurrent flow, and the cost is low, which is conducive to mass production.

[0043] In this embodiment, a flow equalization plate 4 and a limiting ring 5 are also included. The limiting ring 5 is installed on one end of the central shaft 2 and is fixedly installed on the flow equalization plate 4. The flow equalization plate 4 is installed in the heat exchange cavity and divides the top and bottom spaces of the heat exchange cavity into flow equalization chambers. The flow equalization plate 4 is provided with a plurality of first flow equalization holes. The limiting ring 5 is provided with a plurality of second flow equalization holes at equal intervals along the circumference. The flow equalization plate 4 is provided with third flow equalization holes corresponding to the second flow equalization holes. The flow equalization plate 4 and the limiting ring 5 serve to fix the central shaft 2, limit and support the heat exchange core 3. At the same time, the first flow equalization holes, second flow equalization holes and third flow equalization holes are all provided to ensure the uniformity of liquid flow in the cavity.

[0044] In this embodiment, the outer shell 1 includes a pair of half-shells, which are assembled by flange docking and sealed with silicone sealing rings 7.

[0045] In this embodiment, the spiral coil 31 is made of one of titanium, 254SMO stainless steel, B30 white copper, or 904L stainless steel.

[0046] In this embodiment, a base 6 is also included. The longitudinal section of the base 6 is L-shaped, and the base 6 and the outer shell 1 are fixed together by bolts.

[0047] In this embodiment, the central shaft 2 is made of PP plastic material and is integrally injection molded. The central shaft 2 includes a central tube 21 and connecting tubes 22 disposed at both ends of the central tube 21. The diameter of the central tube 21 is larger than that of the connecting tubes 22, and the spiral guide ribs 23 are disposed on the surface of the central tube 21.

[0048] In this embodiment, both the flow equalization plate 4 and the limiting ring 5 are made of PP plastic sheet material.

[0049] The working principle of this utility model is as follows:

[0050] The regenerated solution or dehumidifying solution enters the outer shell 1 from the liquid inlet 11 and exits from the liquid outlet 12. The dehumidifying solution or regenerated solution enters the heat exchange core 3 from the liquid inlet pipe 32 and exits from the liquid outlet pipe 33. The flow direction of the dehumidifying solution or regenerating solution into the heat exchange core 3 is opposite to that of the regenerated solution or dehumidifying solution into the outer shell 1. The heat transfer efficiency is improved by the countercurrent flow of the inner and outer pipes. Furthermore, the spiral guide ribs 23 set on the central shaft 2 play a guiding role, increasing liquid turbulence and further improving heat exchange efficiency. This application can achieve efficient heat exchange of solution countercurrent flow, and the cost is low, which is conducive to mass production.

[0051] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0052] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A counter-flow spiral shell-and-tube heat exchanger, characterized in that, The outer casing, heat exchange core, and central shaft; The outer shell has a columnar heat exchange cavity inside, and the surface of the outer shell is also provided with a liquid inlet and a liquid outlet. The central shaft is installed inside the heat exchange cavity, and the surface of the central shaft is provided with spiral guide ribs; The heat exchange core includes a spiral coil and an inlet pipe and an outlet pipe connected to the two ends of the spiral coil, respectively. The inlet pipe and the outlet pipe extend out of the outer shell. The spiral coil is sleeved on the central shaft, and the spiral direction of the spiral coil is opposite to the spiral direction of the spiral guide rib.

2. A counter-flow spiral shell-and-tube heat exchanger according to claim 1, characterized in that, It also includes a flow equalization plate and a limiting retaining ring. The limiting retaining ring is installed at one end of the central shaft and is fixedly installed on the flow equalization plate. The flow equalization plate is installed in the heat exchange inner cavity and divides the top and bottom spaces of the heat exchange inner cavity into flow equalization chambers. The flow equalization plate has a plurality of first flow equalization holes. The surface of the limiting retaining ring has a plurality of second flow equalization holes at equal intervals along the circumference. The flow equalization plate has a third flow equalization hole corresponding to the second flow equalization holes.

3. A counter-flow spiral shell-and-tube heat exchanger according to claim 1, characterized in that, The outer shell includes a pair of half-shells, which are assembled by flange connection and sealed with silicone sealing rings.

4. A counter-flow spiral shell-and-tube heat exchanger according to claim 1, characterized in that, The spiral coil is made of one of the following: titanium, 254SMO stainless steel, B30 white copper, or 904L stainless steel.

5. A counter-flow spiral shell-and-tube heat exchanger according to claim 1, characterized in that, It also includes a base, the longitudinal section of which is L-shaped, and the base is fixed to the outer shell by bolts.

6. A counter-flow spiral shell-and-tube heat exchanger according to claim 1, characterized in that, The central shaft is made of PP plastic and is integrally injection molded. The central shaft includes a central tube and connecting tubes at both ends of the central tube. The diameter of the central tube is larger than that of the connecting tubes, and the spiral guide ribs are disposed on the surface of the central tube.

7. A counter-flow spiral shell-and-tube heat exchanger according to claim 2, characterized in that, The flow equalization plate and the limiting ring are both made of PP plastic sheet material.

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