Multi-pipe-diameter, multi-helix-angle and multi-strand-flow winding pipe type heat exchanger

Abstract

The utility model relates to the technical field of shell-and-tube heat exchangers, and particularly discloses a multi-pipe-diameter multi-helix-angle multi-strand winding pipe type heat exchanger. Comprising a shell, a middle core cylinder installed in the shell and a spiral assembly spirally wound on the outer side of the middle core cylinder in the axial direction of the middle core cylinder. The spiral assembly comprises a plurality of spiral winding tube bundle layers which are spirally wound on the outer side of the middle core cylinder in sequence; each spiral winding tube bundle layer comprises a plurality of groups of spiral winding tubes wound on the outer side of the middle core cylinder, and the outer diameters of the spiral winding tubes in each spiral winding tube bundle layer are arranged at equal intervals; one or more fluid media are arranged in the spiral winding pipes on the same layer, and one or more wall thicknesses of the spiral winding pipes are arranged and correspond to the fluid media in a one-to-one mode. The heat exchange requirement and the winding strength requirement can be effectively met, meanwhile, the use efficiency of the material can be improved, and the production and processing cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shell and tube heat exchangers, and more specifically to a multi-tube diameter, multi-helix angle, and multi-stream wound tube heat exchanger. Background Art

[0002] Heat exchangers play an important role in the energy, chemical, metallurgy, petroleum and other industrial fields. Shell and tube heat exchangers are common heat exchangers and are widely used. However, due to the complexity of the current heat exchange environment, the requirements for heat exchangers are gradually increasing.

[0003] The wound tube heat exchanger is a new type of efficient heat exchanger with high heat transfer efficiency, compact structure, more tubes can be arranged per unit volume, large-scale layout can be achieved, thermal expansion of the heat exchange tubes in the heat exchanger can be self-compensated, and it can be used for simultaneous heat exchange of multiple fluids, which is called multi-stream heat exchange.

[0004] At present, in the multi-stream heat exchange process, since there are many different working conditions in the tube side and fluids with different properties are exchanging heat with the shell side fluid at the same time; the pressure of each tube side fluid is different and may be very different. In the prior art, only one winding tube diameter structure is often used in the entire heat exchanger; using only one winding tube structure under the condition of tube diameter will lead to inadequate use of materials and waste of winding tube materials. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger, which can effectively meet the requirements of heat exchange and winding strength, and at the same time can improve the use efficiency of materials and reduce production and processing costs;

[0006] The solution adopted by the utility model to solve the technical problem is:

[0007] A multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger, comprising a shell, a core tube installed in the shell, and a spiral assembly spirally wound on the outside of the core tube along the axis direction of the core tube;

[0008] The spiral assembly includes multiple layers of spirally wound tube bundles which are sequentially spirally wound around the outside of the central core tube;

[0009] Each layer of spirally wound tube bundles includes a plurality of groups of spirally wound tubes wound on the outside of the central core tube, the outer diameters of the spirally wound tubes in each layer of spirally wound tube bundles are arranged at equal intervals, and the spiral angles of the spirally wound tubes in each layer of spirally wound tube bundles are the same;

[0010] The fluid medium in the spirally wound tube described in the same layer is one or more types, and the wall thickness of the spirally wound tube is one or more types and is set one-to-one corresponding to the fluid medium.

[0011] In some possible implementations,

[0012] The winding directions of two adjacent spirally wound tube bundle layers are opposite.

[0013] In some possible implementations,

[0014] The gap between two adjacent groups of spirally wound tubes in each layer of the spirally wound tube bundle is the same and is 2-7 mm.

[0015] In some possible implementations,

[0016] The helical angles of two adjacent layers of the spirally wound tube bundle are different.

[0017] In some possible implementations,

[0018] Positioning and separation components are respectively arranged between the central core tube and the spirally wound tube bundle layer and between adjacent spirally wound tube bundle layers.

[0019] In some possible implementations,

[0020] The positioning and separation assembly includes a pad and a rack with an arc-shaped groove; the arc-shaped groove is arranged in a one-to-one correspondence with the spirally wound tube.

[0021] In some possible implementations,

[0022] The shell is provided with a tube-side inlet pipe, a tube-side outlet pipe arranged one-to-one with the tube-side inlet pipe, and a shell-side inlet pipe and a shell-side outlet pipe communicating with the inside of the shell;

[0023] The number of the tube-side inlet pipes and the tube-side outlet pipes is the same as the number of the types of fluid media, and are respectively connected to the two ends of the spirally wound tube.

[0024] In some possible implementations,

[0025] Tube sheets expanded and connected to corresponding spirally wound tubes are respectively arranged on the shells.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] The utility model effectively increases the axial spacing between the same layer and the radial spacing between two adjacent layers by setting the outer diameter of each layer of spirally wound tubes to be the same and different from the outer diameter of the spirally wound tubes in another layer, thereby reducing the flow resistance of the shell-side fluid, improving the flow condition of the shell-side fluid, enhancing the turbulence of the fluid, and thus enhancing the heat exchange efficiency of the heat exchanger;

[0028] In the utility model, the helical angles of two adjacent spirally wound tube bundle layers are set to be different, which can maximize the heat exchange efficiency of the heat exchanger within the allowable pressure drop range, thereby reducing the cost of the heat exchanger;

[0029] The utility model can realize the use with different fluid media by setting different wall thicknesses in the spiral winding tube of the same layer. When in use, winding is performed according to actual conditions, which can reduce the difficulty of winding and improve the working efficiency of winding.

[0030] In the utility model, the wall thickness of the spirally wound tube is set correspondingly to the pressure of the fluid medium, which can meet the requirements of heat exchange and the strength of the wound tube itself, and can also improve the utilization efficiency of materials and reduce the cost of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the central core tube and two adjacent groups of spirally wound tube bundle layers in the utility model when the spiral winding directions are opposite;

[0033] Figure 3 It is a schematic diagram of the structure of the spirally wound tube and the rack in the utility model;

[0034] Figure 4 It is a schematic diagram of the structure of the central core tube and two adjacent groups of spirally wound tube bundles with different spiral angles in the utility model;

[0035] Figure 5 This is a schematic diagram of the structure of the present invention when the spirally wound tube bundle layer has three layers and the first tube bundle layer contains four fluid media;

[0036] Among them: 1. core tube; 2. spirally wound tube bundle layer; 21. tube bundle layer one; 22. tube bundle layer two; 23. tube bundle layer three; 20. spirally wound tube; 4. tube sheet; 5. rack; 6. shell; 7. inlet pipe one; 8. outlet pipe; 9. inlet pipe two; 10. outlet pipe two; 11. shell side inlet pipe; 12. shell side outlet pipe. DETAILED DESCRIPTION

[0037] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity limit, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can indicate: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0038] The utility model is described in detail below.

[0039] like Figure 1-Figure 5 As shown:

[0040] A multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger, comprising a shell 6, a core tube 1 installed in the shell 6, and a spiral component spirally wound around the outside of the core tube 1 along the axial direction of the core tube 1;

[0041] The spiral assembly includes multiple layers of spirally wound tube bundle layers 2 which are sequentially spirally wound around the outside of the central core tube 1;

[0042] Each layer of the spirally wound tube bundle 2 includes a plurality of groups of spirally wound tubes 20 wound on the outside of the central core tube 1. The outer diameters of the spirally wound tubes 20 in each layer of the spirally wound tube bundle 2 are arranged at equal intervals. The spiral angles of the spirally wound tubes 20 in each layer of the spirally wound tube bundle 2 are the same.

[0043] The fluid medium in the spirally wound tube 20 of the same layer is one or more, and the wall thickness of the spirally wound tube 20 is one or more and is set one by one corresponding to the fluid medium; the spirally wound tube 20 of the same layer is used with a variety of fluid media, so that in actual use, it can be selected when winding in and out, and work can be performed according to the most convenient method; the wall thickness of the spirally wound tube 20 can be calculated according to the pressure of the fluid medium, which will not be described in detail here;

[0044] The winding directions of the two adjacent layers of the spirally wound tube bundle 2 are opposite; the helical angles of the two adjacent layers of the spirally wound tube bundle 2 are different; specifically, the helical angle is the angle between the winding direction of the spirally wound tube 20 and the radial direction of the heat exchanger; by setting the helical angles to be different, the maximum heat transfer performance of the heat exchanger can be exerted within the allowable pressure drop range of the fluid medium;

[0045] The shell 6 is provided with a tube-side inlet pipe, a tube-side outlet pipe corresponding to the tube-side inlet pipe, and a shell-side inlet pipe 11 and a shell-side outlet pipe 12 communicating with the inside of the shell 6;

[0046] The number of the tube-side inlet pipes and the tube-side outlet pipes is the same as the number of the types of fluid media, and are respectively connected to the two ends of the spirally wound tube 20;

[0047] The shells 6 are respectively provided with tube sheets to which the corresponding spirally wound tubes 20 are expanded.

[0048] The central core tube 1 is coaxially arranged with the shell 6 and is sleeved in the shell 6, and the spirally wound tube 20 is spirally wound on the outer side of the central core tube 1 along the axis of the central core tube 1 to form a multi-layer structure; the spirally wound tube 20 in each layer has the same helix angle and the same outer diameter, and its wall thickness is designed according to the pressure of the fluid medium; so that the spirally wound tube 20 in the same layer can be wound according to actual conditions, which can reduce the difficulty of winding and improve the working efficiency of winding; the outer diameters of the two adjacent layers of spirally wound tubes 20 are different; the axial spacing between the spirally wound tubes 20 in the same layer and the radial spacing between the spirally wound tubes 20 in adjacent layers are effectively increased, thereby reducing the flow resistance in the shell 6 of the shell-side fluid, improving the flow condition of the shell-side fluid, enhancing the turbulence of the fluid, and thus enhancing the heat exchange efficiency of the heat exchanger; the structural method with different helix angles can maximize the heat exchange efficiency of the heat exchanger within the allowable pressure drop range, thereby reducing the cost of the heat exchanger;

[0049] In some possible implementations, in order to make the heat exchanger have good heat transfer performance;

[0050] The gap between two adjacent groups of spirally wound tubes 20 in each layer of the spirally wound tube bundle 2 is the same, and is 2-7 mm.

[0051] In some possible implementations, in order to effectively fix each layer of the spirally wound tube 20;

[0052] Positioning and separation components are respectively arranged between the central core tube 1 and the spirally wound tube bundle layer 2 and between adjacent spirally wound tube bundle layers 2;

[0053] The positioning and separation assembly includes a gasket and a rack 5 provided with an arc-shaped groove; the arc-shaped groove is arranged in a one-to-one correspondence with the spirally wound tube 20; wherein the arc-shaped groove is in a concave arc shape and its inner diameter is adapted to the outer diameter of the spirally wound tube 20.

[0054] In some possible implementations,

[0055] The shell 6 is provided with a tube-side inlet pipe, a tube-side outlet pipe corresponding to the tube-side inlet pipe, and a shell-side inlet pipe 11 and a shell-side outlet pipe 12 communicating with the inside of the shell 6;

[0056] The number of the tube-side inlet pipes and the tube-side outlet pipes is the same as the number of the types of fluid media, and are respectively connected to the two ends of the spirally wound tube 20 .

[0057] The tube-side inlet pipe and the tube-side outlet pipe are of the same type as the fluid medium, and the spirally wound tube 20 having the same fluid medium inside will be connected to the same set of tube-side inlet pipes and tube-side outlet pipes;

[0058] If there are two types of fluid media, there will be two groups of pipe inlet pipes and pipe outlet pipes.

[0059] In some possible implementations,

[0060] The shell 6 is provided with tube sheets expanded with corresponding spirally wound tubes 20, and the tube sheets are respectively arranged corresponding to the tube inlet pipe and the tube outlet pipe. The spirally wound tubes 20 expanded on the tube sheets will be connected with the corresponding tube inlet pipe and the tube outlet pipe.

[0061] Embodiment 1:

[0062] In this embodiment, the spirally wound tube bundle layer 2 is composed of two layers, including a tube bundle layer 1 21 wound around the outside of the core tube 1 and a tube bundle layer 22 wound around the outside of the tube bundle layer 1 21. The outer diameters of the spirally wound tubes 20 in the tube bundle layer 1 21 are consistent, and the wall thickness can be one or more types. The spirally wound tubes 20 in the tube bundle layer 1 21 are positioned and supported by racks 5 and gaskets; the outer diameters of the spirally wound tubes 20 in the tube bundle layer 22 are different from those of the spirally wound tubes 20 in the tube bundle layer 1 21, and the wall thickness can be one or more types. The racks 5 and gaskets are used to position and support the spirally wound tubes 20 and separate them from the spirally wound tubes 20 in the tube bundle layer 1 21; the outer diameters of the spirally wound tubes 20 in the tube bundle layer 22 are opposite to the spiral direction of the spirally wound tubes 20 in the tube bundle layer 1 21; Figure 3 As shown, the helical angle of the spirally wound tube 20 in the tube bundle layer 1 21 is a1, and the helical angle of the spirally wound tube 20 in the tube bundle layer 2 22 is a2, a1≠a2; the gap between two adjacent groups of spirally wound tubes 20 in the tube bundle layer 1 21 is 4 mm, and the gap between two adjacent groups of spirally wound tubes 20 in the tube bundle layer 1 21 is 5 mm;

[0063] like Figure 1 As shown, the tube-side inlet pipes are divided into two groups including inlet pipe 1 7 and inlet pipe 2 9, and the tube-side outlet pipes are divided into two groups including outlet pipe 1 8 and outlet pipe 2 10. At this time, there will be two kinds of fluid media in the entire heat exchanger, one of which is used in conjunction with the spirally wound pipe 20 of the tube bundle layer 1 21, and the other is used in conjunction with the spirally wound pipe 20 in the tube bundle layer 22; the two ends of the spirally wound pipe 20 of the tube bundle layer 1 21 will be connected to the outlet pipe 1 8 and the inlet pipe 1 7 after expansion of the tube sheet, and the two ends of the spirally wound pipe 20 of the tube bundle layer 22 will be connected to the outlet pipe 2 10 and the inlet pipe 2 9 after expansion of the tube sheet, and cooperate with the shell 6 fluid in the shell 6 to realize heat exchange.

[0064] Embodiment 2:

[0065] like Figure 5 As shown, the spirally wound tube bundle layer 2 consists of three layers, including a tube bundle layer three 23 located outside the tube bundle layer two 22, wherein the spiral inclination angles of all the spirally wound tubes 20 in the tube bundle layer one 21 are all a, and there are four types of fluid media, which are respectively connected to four groups of tube-side inlet pipes and four groups of tube-side outlet pipes.

[0066] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger, characterized in that: It includes a shell, a core tube installed in the shell, and a spiral component spirally wound around the outside of the core tube along the axis of the core tube; The spiral assembly includes multiple layers of spirally wound tube bundles which are sequentially spirally wound around the outside of the central core tube; Each layer of spirally wound tube bundle comprises a plurality of groups of spirally wound tubes wound on the outside of the central core tube, and the outer diameters of the spirally wound tubes in each layer of spirally wound tube bundle are arranged at equal intervals; The fluid medium in the spirally wound tube described in the same layer is one or more.

2. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 1, characterized in that: The winding directions of two adjacent spirally wound tube bundle layers are opposite.

3. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 1, characterized in that: The gap between two adjacent groups of spirally wound tubes in each layer of the spirally wound tube bundle is the same and is 2-7 mm.

4. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 1, characterized in that: The helical angles of two adjacent layers of the spirally wound tube bundle are different.

5. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 4, characterized in that: Positioning and separation components are respectively arranged between the central core tube and the spirally wound tube bundle layer and between adjacent spirally wound tube bundle layers.

6. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 5, characterized in that: The positioning and separation assembly includes a pad and a rack with an arc-shaped groove; the arc-shaped groove is arranged in a one-to-one correspondence with the spirally wound tube.

7. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 1, characterized in that: The shell is provided with a tube-side inlet pipe, a tube-side outlet pipe arranged one-to-one with the tube-side inlet pipe, and a shell-side inlet pipe and a shell-side outlet pipe communicating with the inside of the shell; The number of the tube-side inlet pipes and the tube-side outlet pipes is the same as the number of the types of fluid media, and are respectively connected to the two ends of the spirally wound tube.

8. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 7, characterized in that: Tube sheets expanded and connected to corresponding spirally wound tubes are respectively arranged on the shells.

9. The multi-tube diameter, multi-helix angle, multi-stream wound tube heat exchanger according to claim 7, characterized in that: The helical angles of the spirally wound pipes in each spirally wound pipe bundle layer are the same.

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