Core structure of coil-wound heat exchanger and coil-wound heat exchanger

Abstract

A core structure of a coil-wound heat exchanger and a coil-wound heat exchanger. The core structure comprises a central cylinder and a heat exchange tube, which extends in the axial direction of the central cylinder and is spirally wound around the periphery of the central cylinder layer by layer from the inside out to form multiple spiral tube layers. The core structure further comprises an annular sound-absorbing cylinder, the peripheral wall of which forms a sound-absorbing cavity with two open ends by means of enclosure and is circumferentially arranged between two adjacent spiral tube layers. During heat exchange, the sound-absorbing cylinder of the present utility model can absorb noise generated during the heat exchange of the part of the core structure enclosed within the sound-absorbing cylinder, thereby achieving the effect of noise reduction. Moreover, since the two ends of the sound-absorbing cylinder are open, a shell-side medium for heat exchange can enter and exit the sound-absorbing cylinder for heat exchange, without affecting the normal heat exchange operation of the core structure.

Description

A core structure for a wound tube heat exchanger and the wound tube heat exchanger itself. Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a core structure of a wound tube heat exchanger and the wound tube heat exchanger itself. Background Technology

[0002] Spiral coil heat exchangers, as a new type of high-efficiency heat exchanger, have the characteristics of compact structure, high heat transfer coefficient, good thermal compensation and virtually no heat transfer dead zone, and are widely used in many fields such as low-temperature methanol washing, air separation and oil refining.

[0003] Existing spiral-wound tube heat exchanger structures, such as the Chinese invention patent "A Spiral-Wound Tube Heat Exchanger for Gas Absorption" with patent number 201910358285.9 and authorization announcement number CN109999619B, and the Chinese utility model patent "Spiral-Wound Tube Heat Exchanger with Cleaning Structure" with patent number 202223107689.7 and authorization announcement number CN218846956U, involve heat exchange between the shell-side medium in the shell-side cylinder and the tube-side medium in the heat exchange tubes during use.

[0004] However, the flow of the heat exchange medium during heat exchange generates noise, and the noise also increases as the overall size of the heat exchanger increases, affecting the user experience.

[0005] Utility Model Content

[0006] The first technical problem to be solved by this utility model is to provide a core structure for a wound tube heat exchanger in order to reduce noise during heat exchange, in light of the current state of the technology.

[0007] The second technical problem to be solved by this utility model is to provide a wound tube heat exchanger having the above-mentioned core structure.

[0008] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a core structure of a wound tube heat exchanger, comprising:

[0009] Central tube;

[0010] The heat exchange tubes extend along the axial direction of the central cylinder and are spirally wound layer by layer from the inside out around the outer circumference of the central cylinder to form a multi-layer spiral tube.

[0011] Its characteristic is that it also includes:

[0012] The annular sound-absorbing cylinder has its circumferential walls forming a sound-absorbing cavity with open ends, and its circumferential walls are arranged between two adjacent spiral tubes within it.

[0013] Thus, during heat exchange, the sound-absorbing cylinder of this invention can absorb the noise generated during heat exchange of its inner core structure, achieving a noise reduction effect; at the same time, since the two ends of the sound-absorbing cylinder are open, the shell-side medium used for heat exchange can enter and exit the sound-absorbing cylinder for heat exchange, without affecting the normal heat exchange operation of the core structure.

[0014] Preferably, there are at least two sound-absorbing cylinders, arranged along the axial direction of the central cylinder.

[0015] Preferably, the inner diameters of two axially adjacent sound-absorbing cylinders are different, so that they are arranged one inside and one outside between their respective adjacent layers of spiral tubes. This ensures that the shell-side medium for heat exchange can enter and exit each sound-absorbing cylinder.

[0016] Furthermore, the adjacent ends of two axially adjacent sound-absorbing cylinders overlap, one inside and one outside, to form an annular gap. This improves noise reduction without affecting heat exchange.

[0017] Furthermore, there are at least three sound-absorbing cylinders, and the first sound-absorbing cylinder with a large inner diameter and the second sound-absorbing cylinder with a small inner diameter are arranged alternately along the axial direction of the central cylinder.

[0018] In the above-mentioned schemes, preferably, the wall thickness of the peripheral wall of the sound-absorbing cylinder is less than the spacing between the adjacent spiral tubes.

[0019] Furthermore, adjacent spiral tubes are separated by axially extending spacers, and the sound-absorbing cylinder is constrained to the corresponding spacer. This constrains the sound-absorbing cylinder and the heat exchange tube together, improving the overall structural stability.

[0020] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a wound tube heat exchanger, including a shell-side cylinder and a core structure disposed in the shell-side cylinder, characterized in that the core structure adopts the core structure described above.

[0021] Compared with the prior art, the advantages of this utility model are as follows: by setting an annular sound-absorbing cylinder, the sound-absorbing cylinder can absorb the noise generated by the heat exchange of its inner core structure during heat exchange, thus achieving the effect of noise reduction; at the same time, since the two ends of the sound-absorbing cylinder are open, the shell-side medium used for heat exchange can enter and exit the sound-absorbing cylinder for heat exchange without affecting the normal heat exchange operation of the core structure. Attached Figure Description

[0022] Figure 1 is a structural schematic diagram of an embodiment of the present invention.

[0023] Figure 2 is a cross-sectional view of point A in Figure 1. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Figures 1 and 2 show the core structure of a wound tube heat exchanger according to this utility model, as well as a preferred embodiment of the wound tube heat exchanger. The core structure includes a central cylinder 1, heat exchange tubes 2, and a sound-absorbing cylinder 3.

[0026] The central cylinder 1 is set vertically.

[0027] The heat exchange tube 2 extends axially along the central cylinder 1 and is spirally wound layer by layer around the outer circumference of the central cylinder 1 from the inside out to form a multi-layer spiral tube 20. Adjacent spiral tubes 20 are separated by axially extending gaskets 6. The gaskets 6 and the connection structure between the gaskets 6 and the heat exchange tube 2 are the same as those in the prior art (for example, see Chinese Utility Model Patent No. 202120502424.3, Authorization Announcement No. CN214842720U "A Gasket for a Spiral Tube Heat Exchanger" and Chinese Utility Model Patent No. 202120502461.4, Authorization Announcement No. CN214842721U "A Connection Structure for Heat Exchange Tubes of a Spiral Tube Heat Exchanger"), and will not be described in detail here.

[0028] The aforementioned sound-absorbing cylinder 3 is annular, with its peripheral walls forming a sound-absorbing cavity open at both ends. Its peripheral walls are circumferentially positioned between two adjacent layers of spiral tubes 20, and the wall thickness of the sound-absorbing cylinder 3 is less than the distance L between adjacent layers of spiral tubes 20. The sound-absorbing cylinder 3 is constrained by its corresponding spacer strip (which can be assembled by welding, bolts, or nuts). In this embodiment, there are four sound-absorbing cylinders 3 (not limited to four, but arranged according to specific needs), arranged axially along the central cylinder 1. The inner diameters of two axially adjacent sound-absorbing cylinders 3 are different; the first sound-absorbing cylinder with a larger inner diameter and the second sound-absorbing cylinder with a smaller inner diameter are alternately arranged axially along the central cylinder 1, so that each sound-absorbing cylinder 3 is distributed between different layers of spiral tubes 20. Simultaneously, the adjacent ends of two axially adjacent sound-absorbing cylinders 3 overlap, one inner and one outer, to form an annular gap 31.

[0029] The wound tube heat exchanger of this embodiment includes a shell-side cylinder 4, a tube sheet 5, and the aforementioned core structure. The shell-side cylinder 4 is vertically arranged, and tube sheets 5 are provided at both its upper and lower ends. The core structure is located inside the shell-side cylinder 4, and the two ends of the heat exchange tubes 2 are respectively supported on their corresponding tube sheets. The peripheral wall of the sound-absorbing cylinder 3 is spaced apart from the annular wall of the shell-side cylinder 4.

[0030] During heat exchange, the sound-absorbing cylinder 3 can absorb the noise generated by the heat exchange of its inner core structure, thus achieving a noise reduction effect. At the same time, since the two ends of the sound-absorbing cylinder 3 are open, the shell-side medium used for heat exchange can enter and exit the sound-absorbing cylinder for heat exchange without affecting the normal heat exchange operation of the core structure.

Claims

1. A core structure for a wound tube heat exchanger, comprising: Central tube (1); The heat exchange tube (2) extends along the axial direction of the central cylinder (1) and is spirally wound layer by layer from the inside to the outside of the central cylinder (1) to form a multi-layer spiral tube (20); Its features It also includes: The annular sound-absorbing tube (3) has its peripheral walls forming a sound-absorbing cavity with open ends, and its peripheral walls are arranged circumferentially between two adjacent spiral tubes (20).

2. The core structure according to claim 1, characterized in that: There are at least two sound-absorbing cylinders (3), which are arranged along the axial direction of the central cylinder (1).

3. The core structure according to claim 2, characterized in that: The inner diameters of two adjacent sound-absorbing tubes (3) in the axial direction are different, so that they are arranged one inside and one outside between their respective adjacent two layers of spiral tubes (20).

4. The core structure according to claim 3, characterized in that: The adjacent ends of two adjacent sound-absorbing cylinders (3) in the axial direction overlap to form an annular gap (31).

5. The core structure according to claim 4, characterized in that: There are at least three sound-absorbing cylinders (3), and the first sound-absorbing cylinder with a large inner diameter and the second sound-absorbing cylinder with a small inner diameter are arranged alternately along the axial direction of the central cylinder (1).

6. The core structure according to any one of claims 1 to 5, characterized in that: The wall thickness of the peripheral wall of the sound-absorbing tube (3) is less than the distance (L) between the adjacent spiral tubes (20) in which it is located.

7. The core structure according to claim 6, characterized in that: The adjacent spiral tubes (20) are separated by axially extending spacers (6), and the sound-absorbing tube (3) is constrained together with the corresponding spacers (6).

8. A wound tube heat exchanger, comprising a shell-side cylindrical body (4) and a core structure disposed within the shell-side cylindrical body (4), characterized in that... The core structure adopts the core structure described in any one of claims 1 to 7.

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