Winding pipe type heat exchanger

Abstract

A winding pipe type heat exchanger comprises a vertically-arranged shell pass barrel, a shell pass inlet connecting pipe, a winding pipe, a winding pipe, a winding pipe, a winding pipe, a winding pipe, a winding pipe, a winding pipe, a winding pipe and a winding pipe, and is characterized in that the shell pass barrel is provided with a shell pass inlet connecting pipe for external hot water to enter; the central cylinder is vertically arranged in the shell pass cylinder, the interior of the central cylinder is hollow to form an independent channel, and an opening in the upper end of the independent channel is formed in the top of the shell pass cylinder so that external steam can enter the central cylinder; the heat exchange tube is located in the shell pass cylinder and spirally wound around the periphery of the center cylinder in the vertical direction, and the two ends of the heat exchange tube are ports for tube pass media to enter and exit correspondingly; the steam jet is arranged in the shell pass barrel and below the heat exchange tube, an air inlet of the steam jet is communicated with a lower port of the center barrel, the steam jet is provided with a plurality of air outlets, and at least part of the air outlets are formed in the periphery of the center barrel in the circumferential direction. According to the water bath type heat exchanger, efficient and energy-saving water bath type heat exchange can be realized.

Description

Technical Field

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

[0002] Existing wound tube heat exchangers typically include a shell, a central cylinder within the shell, and heat exchange tubes spirally wound around the central cylinder from the inside out. The shell is equipped with a shell-side inlet pipe and a shell-side outlet pipe for the shell-side medium to flow through. During heat exchange, the shell-side medium enters the shell through the shell-side inlet pipe, exchanges heat with the tube-side medium in the heat exchange tubes, and then exits through the shell-side outlet pipe. Specific examples include the structures disclosed in Chinese invention patent application number CN201910358285.9, "A Wound Tube Heat Exchanger for Gas Absorption" (authorization announcement number CN109999619B), and Chinese utility model patent application number 202321992906.7, "A Wound Tube Heat Exchanger" (authorization announcement number CN220339169U).

[0003] Existing spiral wound tube heat exchangers, as high-efficiency and energy-saving heat exchangers, have advantages such as high heat transfer coefficient, large heat transfer area per unit volume, and good resistance to temperature difference effects, and are widely used in the petrochemical field. Utility Model Content

[0004] The first technical problem to be solved by this utility model is to provide a wound tube heat exchanger that is equally efficient and energy-saving, in light of the current state of the technology.

[0005] The second technical problem to be solved by this utility model is to provide a spiral wound tube heat exchanger that is easy to maintain.

[0006] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a wound tube heat exchanger, comprising:

[0007] The shell-side cylinder is arranged vertically and is provided with a shell-side inlet pipe for external hot water to enter, and the interior of the shell-side cylinder forms a cavity for containing hot water.

[0008] The central cylinder is vertically disposed within the shell-side cylinder;

[0009] The heat exchange tube is located inside the shell-side cylinder and is spirally wound around the outer periphery of the central cylinder in a vertical direction. The two ends of the heat exchange tube are ports for supplying the tube-side medium to enter and exit.

[0010] Its features are:

[0011] The interior of the central cylinder is hollow and forms an independent channel. The upper end of the independent channel opens to the top of the shell-side cylinder to allow external steam to enter.

[0012] The wound tube heat exchanger also includes:

[0013] A steam nozzle is located inside the shell-side cylinder, below the heat exchange tubes, and the air inlet of the steam nozzle is connected to the lower port of the central cylinder. The steam nozzle has multiple air outlets, and at least some of the air outlets are arranged circumferentially around the periphery of the central cylinder.

[0014] During heat exchange, external hot water enters through the shell-side inlet pipe and accumulates in the cavity of the shell-side cylinder. Steam is input downward from the upper port of the central cylinder and ejected from the vent holes of the steam nozzles. Since the steam nozzles are located below the heat exchange tubes, and at least some of the vent holes of the steam nozzles are arranged circumferentially around the periphery of the central cylinder, the steam ejected from each vent hole can penetrate deep into the bottom of the hot water to continuously and evenly heat the hot water, and can also agitate the hot water, causing it to flow in the cavity and exchange heat with the tube-side medium in the heat exchange tubes, thereby achieving efficient and energy-saving water bath heat exchange.

[0015] Preferably, each vent is positioned downwards. This allows for better agitation of the hot water flow.

[0016] Preferably, the steam nozzle includes an annular coil that surrounds the periphery of the central cylinder, and the bottom wall of the coil is provided with the aforementioned air outlet holes spaced circumferentially. The coil and the central cylinder are connected by an intermediate connecting pipe. The cooperation between the coil and the central cylinder ensures the flow of hot water within the cavity.

[0017] Furthermore, the intermediate connecting pipe includes a vertically extending vertical pipe, the upper end of which serves as an air inlet and connects to the lower end of the central cylinder, and at least two openings are provided circumferentially on the pipe wall of the vertical pipe; the intermediate connecting pipe also includes horizontal pipes extending outward from the edge of each opening, and the outer end of each horizontal pipe is circumferentially opened at intervals on the inner ring wall of the coil.

[0018] In this way, the steam flowing downward from the central cylinder can diffuse evenly from the center to the surrounding coils, and then be ejected from the steam outlets on the coils, making the hot water inside the cavity heated more evenly.

[0019] Furthermore, the lower end of the vertical pipe is closed by an end plate, and the end plate has multiple air outlets distributed at intervals. This allows some of the steam inside the central cylinder to be directly ejected downwards through the air outlets on the end plate.

[0020] In the above scheme, the steam nozzle can be suspended in the shell-side cylinder solely by the central cylinder. To improve the stability of the overall structure, preferably, at least three support members are provided at circumferential intervals on the inner side of the shell-side cylinder, and the steam nozzle is supported on the support members.

[0021] Preferably, the support member is a support bar extending radially along the shell side of the cylinder.

[0022] Steam nozzles can be placed directly on the support bars. Alternatively, corresponding connecting bars can be installed on the steam nozzles. When the steam nozzles are placed on the support bars, the connecting bars are bolted to the corresponding support bars to further improve the stability of the structure.

[0023] To further address the second technical problem mentioned above, preferably, the shell-side cylinder includes a main body with an open top and a cover that can be detachably installed on the top of the main body. The upper end of the central cylinder opens into the central portion of the cover. The upper end of the heat exchange tube extends upward and is supported on the outer periphery of the cover. The lower end of the heat exchange tube is supported on a tube sheet, and the tube sheet is detachably constrained to the main body, thereby allowing the entire assembly consisting of the tube sheet, heat exchange tube, central cylinder, steam nozzle, and cover to detach upward from the main body.

[0024] Preferably, the upper end of the central cylinder passes through the central through hole of the cover and is located above the cover, and a sealing ring is provided between the central cylinder and the hole wall of the central through hole. The inner ring surface of the sealing ring contacts the side of the central cylinder, the outer ring surface of the sealing ring contacts the hole wall of the central through hole, and the lower end surface of the sealing ring is supported on the stepped surface of the hole wall of the central through hole.

[0025] It also includes a clamping element and fasteners. The fasteners are detachably connected to the cover body after passing through a perforation in the clamping element, so as to press the lower end face of the clamping element against the upper end face of the sealing ring. This ensures the sealing between the central cylinder and the cover body.

[0026] In the above embodiments, preferably, the shell-side inlet pipe is located on the side wall of the lower part of the shell-side cylinder; the side wall of the upper part of the shell-side cylinder is provided with an overflow port; and the bottom of the shell-side cylinder is provided with a drain port.

[0027] Compared with the prior art, the advantages of this utility model are as follows: By setting up a steam nozzle and an internally hollow central cylinder, during heat exchange, external hot water enters from the shell-side inlet pipe and accumulates in the cavity of the shell-side cylinder. Steam is input downward from the upper port of the central cylinder and ejected from the vent holes of the steam nozzle. Since the steam nozzle is located below the heat exchange tubes, and at least some of the vent holes of the steam nozzle are arranged circumferentially around the periphery of the central cylinder, the steam ejected from each vent hole can penetrate deep into the bottom of the hot water to continuously and evenly heat the hot water, and can also agitate the hot water, causing the hot water to flow in the cavity and exchange heat with the tube-side medium in the heat exchange tubes, thereby achieving efficient and energy-saving water bath heat exchange. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0029] Figure 2 for Figure 1 A view along the AA direction;

[0030] Figure 3 for Figure 1 Top view;

[0031] Figure 4 for Figure 1 Enlarged view of section B in the middle. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figures 1-4 As shown, this is a preferred embodiment of a wound tube heat exchanger of the present invention. The wound tube heat exchanger includes a shell-side cylinder 1, a central cylinder 2, heat exchange tubes 3, steam nozzles 4, support members 5, tube sheets 6, sealing rings 7, clamping members 71, and fasteners 72.

[0034] The shell-side cylinder 1 is vertically arranged and includes: a main body 11 with an internal cavity 10 for containing hot water and an open top; and a cover 12 that is detachably mounted on the top of the main body 11, with a central through hole 120 in the center of the cover 12. The cover 12 and the main body 11 are detachably connected by a flange and flange bolts. Meanwhile, the lower side wall of the main body 11 has a shell-side inlet pipe 10a for allowing external hot water to enter, the upper side wall of the main body 11 has an overflow port 10b, and the bottom of the main body 11 has a drain port 10c.

[0035] The central cylinder 2 is vertically positioned and hollow inside, forming a vertically penetrating independent channel 20. The lower end of the central cylinder 2 is located inside the main body 11. The upper end of the central cylinder 2 passes through the central through-hole 120 of the cover 12 and is positioned above the cover 12 to allow external steam to enter. To ensure the airtightness between the central cylinder 2 and the cover 12, such as... Figure 1 , 4 As shown, a sealing ring 7 is provided between the central cylinder 2 and the wall of the central through hole 120. The inner annular surface of the sealing ring 7 contacts the side of the central cylinder 2, and the outer annular surface of the sealing ring 7 contacts the wall of the central through hole 120. The lower end face of the sealing ring 7 is supported on the stepped surface of the wall of the central through hole 120. The aforementioned clamping member 71 is annular and located above the sealing ring 7. The aforementioned fastener 72 is a bolt and nut assembly. The bolt shank of the bolt and nut assembly passes downward through the through hole on the clamping member 71 and is threaded to the cover 12. The nut in the bolt and nut assembly is located above the clamping member 71 to press the lower end face of the clamping member 71 against the upper end face of the sealing ring 7. This ensures the sealing effect of the sealing ring 7 and prevents leakage of the medium inside the shell-side cylinder.

[0036] Multiple heat exchange tubes 3 are located inside the shell-side cylinder 1 and are spirally wound vertically from the inside out around the outer circumference of the central cylinder 2. The two ends of each heat exchange tube 3 are ports for supplying the tube-side medium. In this embodiment, the upper end of each heat exchange tube 3 extends upward and is circumferentially supported on the outer periphery of the cover 12. Furthermore... Figure 1 , 3 As shown, the cover 12 is provided with an annular tube box 121. Two tube-side outlet connectors 122 are spaced circumferentially on the tube box 121. The tube-side outlet connectors 122 are connected to the upper end of each heat exchange tube 3 through the tube box 121, so that the tube-side medium output from the upper end of each heat exchange tube 3 can be mixed in the tube box 121 and then output from the tube-side outlet connectors 122. The lower end of the heat exchange tube 3 is supported on the tube sheet 6. A tube-side inlet connector 111 is provided on the side wall of the lower part of the main body 11. The tube sheet 6 is bolted to the tube-side inlet connector 111, so that the lower end of the heat exchange tube 3 is connected to the tube-side inlet connector 111, and the tube sheet 6 can be detached from the tube-side inlet connector 111. In this embodiment, as... Figure 1 As shown, there are two tube inlet pipes 111, which are arranged opposite each other on both sides of the main body 11. There are also two tube sheets 6, which are respectively set with their respective tube inlet pipes 111. The lower ends of the multiple heat exchange tubes 3 are divided into two strands, which are respectively supported on their respective tube sheets 6.

[0037] like Figure 1 , 2 As shown, the steam nozzle 4 is located inside the shell-side cylinder 1, below the heat exchange tube 3. The steam nozzle 4 includes a coil 41, a vertical pipe 42, and a horizontal pipe 43. The vertical pipe 42 extends vertically, and its upper end serves as the air inlet 4a of the steam nozzle 4, which is threadedly connected to the lower end of the central cylinder 2 to achieve communication between the two. The lower end of the vertical pipe 42 is closed by an end plate 421, and multiple air outlets 4b are distributed at intervals on the end plate. At the same time, two openings are equally spaced along the circumference on the pipe wall of the vertical pipe 42. The coil 41 is annular and surrounds the vertical pipe 42 circumferentially, and multiple air outlets 4b are spaced along the circumference on the bottom wall of the coil 41. There are two horizontal pipes 43, which are placed horizontally between the coil 41 and the vertical pipe 42. The inner end of the horizontal pipe 43 is connected to the opening on the corresponding vertical pipe 42. The outer end of the horizontal pipe 43 is circumferentially spaced out of the inner ring wall of the coil 41 to connect the coil 41 and the vertical pipe 42. At the same time, the bottom wall of the horizontal pipe 43 is provided with multiple air outlets 4b at intervals.

[0038] Thus, as steam flows downwards along the independent channels 20 within the central cylinder 2, some steam can diffuse through the horizontal tube 43 into the coil 41 and be ejected from the vents 4b on the horizontal tube 43 and the coil 41. Some steam can also be ejected through the vents 4b at the bottom of the vertical tube 42. Since each vent 4b faces downwards or is tilted downwards, the steam ejected from each vent 4b can heat the hot water while simultaneously agitating it, causing the hot water to flow within the cavity and exchange heat with the tube-side medium in the heat exchange tubes.

[0039] In this embodiment, the tube-side medium in the heat exchange tube can be liquid nitrogen or other liquefied gases. The hot water heated by steam flows in the cavity and exchanges heat with the liquefied gas in the heat exchange tube, causing the liquefied gas to heat up and vaporize. This process is called water bath vaporization.

[0040] In order to support the steam nozzle 4, in this embodiment, eight support members 5 are provided at equal intervals along the circumference on the inner side of the shell cylinder 1. Each support member 5 is a support bar that extends radially along the shell cylinder 1, and the coil 41 of the steam nozzle 4 is supported on the support member 5.

[0041] When maintenance or cleaning is required, the assembly consisting of tube sheet 6, heat exchange tube 3, central cylinder 2, steam nozzle 4 and cover 12 in this embodiment can be detached upwards from the main body 11 for easy operation.

[0042] In the specification and claims of this utility model, terms indicating direction, such as "upper," "lower," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0043] The term "vertical" is also used in the specification and claims of this utility model, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

[0044] The term "radial" is also used in the specification and claims of this utility model, meaning basically along the inside and outside direction, and is not limited to the radial direction that passes through the center of the circle, but can also be slightly deviated from the radial direction.

Claims

1. A wound tube heat exchanger, comprising: The shell-side cylinder (1) is arranged vertically and is provided with a shell-side inlet pipe (10a) for external hot water to enter, and the shell-side cylinder (1) forms a cavity (10) for containing hot water. The central cylinder (2) is vertically disposed inside the shell-side cylinder (1); The heat exchange tube (3) is located inside the shell-side cylinder (1) and is spirally wound around the outer periphery of the central cylinder (2) in a vertical direction. The two ends of the heat exchange tube (3) are ports for supplying the tube-side medium to enter and exit. Its features are: The interior of the central cylinder (2) is hollow and forms an independent channel (20). The upper end of the independent channel (20) opens to the top of the shell-side cylinder (1) to allow external steam to enter. The wound tube heat exchanger also includes: A steam nozzle (4) is located inside the shell-side cylinder (1) below the heat exchange tube (3), and the air inlet (4a) of the steam nozzle (4) is connected to the lower port of the central cylinder (2). The steam nozzle (4) has multiple air outlets (4b), and at least some of the air outlets (4b) are arranged circumferentially around the central cylinder (2).

2. The wound tube heat exchanger according to claim 1, characterized in that: Each air outlet (4b) is set downwards.

3. The wound tube heat exchanger according to claim 2, characterized in that: The steam nozzle (4) includes an annular coil (41) that surrounds the periphery of the central cylinder (2) in the circumferential direction, and the bottom wall of the coil (41) is provided with the above-mentioned air outlet holes (4b) in the circumferential direction. The coil (41) and the central cylinder (2) are connected by an intermediate connecting pipe.

4. The wound tube heat exchanger according to claim 3, characterized in that: The intermediate connecting pipe includes a vertically extending vertical pipe (42), the upper end of which serves as an air inlet (4a) and connects with the lower end of the central cylinder (2). At least two openings are provided circumferentially on the pipe wall of the vertical pipe (42). The intermediate connecting pipe also includes a horizontal pipe (43) extending outward from the edge of each opening. The outer end of each horizontal pipe (43) is circumferentially opened at intervals on the inner ring wall of the coil (41).

5. The wound tube heat exchanger according to claim 4, characterized in that: The lower end of the vertical pipe (42) is closed by an end plate (421), and multiple air outlets (4b) are distributed at intervals on the end plate.

6. The wound tube heat exchanger according to claim 1, characterized in that: The inner side of the shell cylinder (1) is provided with at least three support members (5) at circumferential intervals, and the steam nozzle (4) is supported on the support members (5).

7. The wound tube heat exchanger according to claim 6, characterized in that: The support member (5) is a support bar that extends radially along the shell side cylinder (1).

8. The wound tube heat exchanger according to claim 1, characterized in that: The shell-side cylinder (1) includes a main body (11) with an open top and a cover (12) that is detachably mounted on the top of the main body (11). The upper end of the central cylinder (2) opens into the central part of the cover (12). The upper end of the heat exchange tube (3) extends upward and is supported on the outer periphery of the cover (12). The lower end of the heat exchange tube (3) is supported on the tube sheet (6), and the tube sheet (6) is detachably bound to the main body (11), so that the assembly consisting of the tube sheet (6), heat exchange tube (3), central cylinder (2), steam nozzle (4), and cover (12) can be detached upward from the main body (11).

9. The wound tube heat exchanger according to claim 8, characterized in that: The upper end of the central cylinder (2) passes through the central through hole (120) of the cover (12) and is located above the cover (12). A sealing ring (7) is provided between the central cylinder (2) and the hole wall of the central through hole (120). The inner ring surface of the sealing ring (7) contacts the side of the central cylinder (2), and the outer ring surface of the sealing ring (7) contacts the hole wall of the central through hole (120). The lower end face of the sealing ring (7) is supported on the stepped surface of the hole wall of the central through hole (120). It also includes a clamping member (71) and a fastener (72), the fastener (72) being detachably connected to the cover (12) after passing through a perforation on the clamping member (71) to press the lower end face of the clamping member (71) against the upper end face of the sealing ring (7).

10. The wound tube heat exchanger according to any one of claims 1 to 9, characterized in that: The shell-side inlet pipe (10a) is located on the lower side wall of the shell-side cylinder (1); the upper side wall of the shell-side cylinder (1) is provided with an overflow port (10b); and the bottom of the shell-side cylinder (1) is provided with a drain port (10c).

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