Heat exchange device for electrolytic chlorine production system and electrolytic chlorine production system

Abstract

A heat exchange device for an electrolytic chlorine production system includes a drive motor and a heat exchanger housing. The heat exchanger housing is provided with a central axis, multiple heat exchange tubes, and a thermal insulation sleeve. The central axis is arranged in the middle of the heat exchanger housing along the axial direction of the heat exchanger housing. The multiple heat exchange tubes are arranged along the axial direction of the heat exchanger housing and arranged in a spiral shape around the central axis in the circumferential direction of the heat exchanger housing. The thermal insulation sleeve is spirally wound around the central axis in the circumferential direction of the heat exchanger housing and covers the upper and lower sides of the heat exchange tubes, so that the multiple heat exchange tubes are accommodated in the thermal insulation sleeve. The starting end of the thermal insulation sleeve near the central axis is fixedly connected to the central axis, and the end of the thermal insulation sleeve away from the central axis forms an opening. The device has a simple structure. The drive motor drives the thermal insulation sleeve to reel or release, changing the contact area between the heat exchange tubes and seawater, thereby maintaining the seawater temperature within an optimal seawater chlorine production temperature range and improving the operating efficiency of the system. The present invention also discloses an electrolytic chlorine production system.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic chlorine production, and in particular to a heat exchange device for an electrolytic chlorine production system and an electrolytic chlorine production system. Background Art

[0002] Seawater electrolysis is a process of producing chlorine by electrolyzing seawater, causing it to continuously produce hypochlorous acid and hydrogen during the electrolysis process. Although the chemical principle is simple, there are many factors that affect the efficiency of seawater chlorine production, and seawater temperature has a greater impact on the efficiency of electrolytic chlorine production.

[0003] Seawater temperatures in most oceans around the world fluctuate significantly with the seasons. When electrolysis is used to treat seawater, excessively high or low seawater temperatures directly impact chlorine production efficiency. Therefore, most chlorine production systems incorporate heat exchangers to warm the seawater. However, research has shown that chlorine production efficiency is significantly reduced when seawater temperatures are too high or too low. To ensure that existing heat exchangers maintain the seawater temperature within the optimal range during chlorine production system operation, a heat exchange device is urgently needed. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a heat exchange device for an electrolytic chlorine production system to ensure the stability of the heat exchanger outlet temperature, solve the problem of low seawater chlorine production efficiency caused by the seawater outlet temperature of the heat exchanger being too high or too low, and improve the chlorine production efficiency.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The present invention provides a heat exchange device for an electrolytic chlorine production system, comprising a drive motor and a heat exchanger housing. A central axis, a plurality of heat exchange tubes, and a thermal insulation sleeve are provided within the heat exchanger housing. The central axis is arranged in the middle of the heat exchanger housing along the axial direction of the heat exchanger housing. The plurality of heat exchange tubes are arranged along the axial direction of the heat exchanger housing and are arranged in a spiral shape around the central axis in the circumferential direction of the heat exchanger housing. The thermal insulation sleeve is spirally wound around the central axis in the circumferential direction of the heat exchanger housing and covers the upper and lower sides of the heat exchange tubes, so that the plurality of heat exchange tubes are accommodated in the thermal insulation sleeve. The thermal insulation sleeve is fixedly connected to the central axis at a starting end close to the central axis, and an opening is formed at the end of the thermal insulation sleeve away from the central axis. The drive motor is connected to the central axis. When the drive motor rotates, the central axis is driven to rotate, and the central axis drives the thermal insulation sleeve to be retracted or released, so that the plurality of heat exchange tubes can be exposed outside the thermal insulation sleeve through the opening or accommodated within the thermal insulation sleeve.

[0007] In one embodiment, heat exchange tube fixing frames are provided at both ends of the heat exchanger shell, both ends of each heat exchange tube are respectively fixed to the two heat exchange tube fixing frames, and both ends of the central axis are rotatably connected to the two heat exchange tube fixing frames.

[0008] In one embodiment, a thermal insulation sleeve skeleton is further provided in the heat exchanger shell. The thermal insulation sleeve skeleton is also spirally wound around the central axis in the circumferential direction of the heat exchanger shell. The thermal insulation sleeve is supported by the thermal insulation sleeve skeleton.

[0009] In one embodiment, the insulation sleeve frame includes two insulation sleeve side frames located at both ends of the insulation sleeve frame and a plurality of central frame support rods arranged along the axial direction of the heat exchanger shell and connected between the two insulation sleeve side frames, and each insulation sleeve side frame is hinged by a plurality of side frame units.

[0010] In one embodiment, each heat exchange tube fixing frame is fixed with a heat insulation sleeve support frame on the inner surface close to the heat insulation sleeve frame, the heat insulation sleeve support frame is spirally arranged, and a slide groove is defined in the heat insulation sleeve support frame. The two heat insulation sleeve side frames are respectively accommodated in the slide grooves on the inner surfaces of the two heat exchange tube fixing frames. When the drive motor rotates and drives the heat insulation sleeve to be retracted or released, the heat insulation sleeve side frames slide in the slide groove.

[0011] In one embodiment, each side frame unit is connected to at least two central frame support rods to form an insulation sleeve frame unit, and the insulation sleeve includes multiple insulation sleeve units, each insulation sleeve unit corresponds to an insulation sleeve frame unit and is attached to a corresponding insulation sleeve frame unit to form an insulation unit.

[0012] In one embodiment, the thermal insulation sleeve unit is adhered to a side surface of the corresponding thermal insulation sleeve skeleton unit to form the thermal insulation unit.

[0013] In one embodiment, the heat exchanger shell includes a heat exchanger inlet shell, a heat exchanger main shell and a heat exchanger outlet shell connected in sequence, the heat exchanger main shell is provided with a seawater inlet and a seawater outlet, the heat exchanger inlet shell is provided with a heat exchange medium inlet, and the heat exchanger outlet shell is provided with a heat exchange medium outlet.

[0014] The present invention also provides an electrolytic chlorine production system, comprising the heat exchange device for the electrolytic chlorine production system as described above.

[0015] In one embodiment, the electrolysis chlorine production system further includes a temperature sensor and a controller. The temperature sensor is used to detect the seawater outlet temperature of the heat exchanger shell. The controller is electrically connected to the temperature sensor and the drive motor, respectively. The controller controls the drive motor to start or stop according to the seawater outlet temperature detected by the temperature sensor.

[0016] The present invention has the following beneficial effects: by disposing heat exchange tubes arranged spirally around a central axis within a heat exchanger housing, and disposing a thermal insulation sleeve spirally wound around the central axis and covering the upper and lower sides of the heat exchange tubes, the drive motor rotates the central axis, which in turn drives the thermal insulation sleeve to retract or release, allowing multiple heat exchange tubes to be exposed from the thermal insulation sleeve through openings at the ends of the thermal insulation sleeve or to be retracted within the thermal insulation sleeve. This achieves the ability to adjust the number of heat exchange tubes exposed from the thermal insulation sleeve according to the outlet temperature of the seawater, ensuring the stability of the heat exchanger outlet temperature and resolving the problem of low seawater chlorination efficiency caused by excessively high or low seawater outlet temperature. The device has a simple structure and can utilize a sufficient heat source to heat the seawater temperature, ensuring that the seawater inlet temperature of the seawater electrolysis device remains near the optimal electrolysis temperature, thereby improving system operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric view of a heat exchanger for an electrolytic chlorine production system according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A side sectional isometric view of a heat exchanger for a chlorine electrolysis system;

[0019] Figure 3 yes Figure 1 A front cross-sectional view of a heat exchanger for a chlorine electrolysis system;

[0020] Figure 4 yes Figure 1 An axonometric view of the heat-insulating sleeve skeleton in the heat exchange device shown;

[0021] Figure 5 yes Figure 1 An axonometric view of a heat exchange tube fixing frame in the heat exchange device shown;

[0022] Figure 6 yes Figure 1 An axonometric view of the thermal insulation sleeve in the heat exchange device shown;

[0023] Figure 7 yes Figure 1 An axonometric view of the thermal insulation unit in the heat exchange device is shown. DETAILED DESCRIPTION

[0024] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, and not all, of the embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the description of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0025] In the description of the present invention, unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances.

[0026] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0027] The terms "first," "second," "third," etc. are merely used to distinguish elements of similar nature and do not indicate or imply relative importance or a particular order.

[0028] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0029] like Figure 1 、 Figure 2 、 Figure 3 and Figure 6As shown, the present invention provides a heat exchange device for an electrolytic chlorine production system, comprising a drive motor 1 and a heat exchanger housing 2. A central axis 3, a plurality of heat exchange tubes 4, and a heat insulation sleeve 5 are provided in the heat exchanger housing 2. The central axis 3 is arranged in the middle of the heat exchanger housing 2 along the axial direction of the heat exchanger housing 2. The plurality of heat exchange tubes 4 are arranged along the axial direction of the heat exchanger housing 2 and are arranged in a spiral shape around the central axis 3 in the circumferential direction of the heat exchanger housing 2. The heat insulation sleeve 5 is arranged in a spiral shape around the central axis 3 in the circumferential direction of the heat exchanger housing 2. It is rolled up and covered on the upper and lower sides of the heat exchange tube 4, so that multiple heat exchange tubes 4 are stored in the thermal insulation sleeve 5. The starting end of the thermal insulation sleeve 5 close to the central axis 3 is fixedly connected to the central axis 3, and an opening 51 is formed at the end of the thermal insulation sleeve 5 away from the central axis 3. The driving motor 1 is connected to the central axis 3. When the driving motor 1 rotates, it drives the central axis 3 to rotate, and the central axis 3 drives the thermal insulation sleeve 5 to be rolled up or released, so that multiple heat exchange tubes 4 can be exposed outside the thermal insulation sleeve 5 through the opening 51 or stored in the thermal insulation sleeve 5.

[0030] In this embodiment, the present invention arranges a plurality of heat exchange tubes 4 arranged in a spiral shape around the central axis 3 in the heat exchanger shell 2, and the thermal insulation sleeve 5 is spirally wound around the central axis 3 and covers the upper and lower sides of the plurality of heat exchange tubes 4. The starting end of the thermal insulation sleeve 5 close to the central axis 3 is connected to the central axis 3, and an opening 51 is formed at the end away from the central axis 3. When the driving motor 1 rotates, it drives the central axis 3 to rotate, and the central axis 3 drives the thermal insulation sleeve 5 to be retracted or released, so that the plurality of heat exchange tubes 4 can be exposed outside the thermal insulation sleeve 5 through the opening 51 at the end of the thermal insulation sleeve 5 or be stored in the thermal insulation sleeve 5. When the temperature of the seawater after heat exchange through the heat exchange tubes 4 is lower than the set standard temperature, the drive motor 1 rotates (e.g., in the forward direction), driving the central shaft 3 to rotate, which in turn drives the thermal insulation sleeve 5 to retract, allowing more heat exchange tubes 4 to be exposed outside the thermal insulation sleeve 5 through the openings 51, reducing the coverage of the heat exchange tubes 4 by the thermal insulation sleeve 5, increasing the contact area between the heat exchange tubes 4 and the seawater, and providing sufficient heat from the heat exchange tubes 4 to heat the seawater in the heat exchanger housing 2 to the set standard temperature. Conversely, when the temperature of the seawater after heat exchange through the heat exchange tubes 4 is higher than the set standard temperature, the drive motor 1 rotates (e.g., in the reverse direction), driving the central shaft 3 to rotate, which in turn drives the thermal insulation sleeve 5 to release, allowing more heat exchange tubes 4 to enter and be stored in the thermal insulation sleeve 5 through the openings 51, increasing the coverage of the heat exchange tubes 4 by the thermal insulation sleeve 5, reducing the contact area between the heat exchange tubes 4 and the seawater, and preventing the heat exchange tubes 4 from overheating the seawater, thereby ensuring that the seawater entering the heat exchanger housing 2 is heated to the set standard temperature. This invention adjusts the amount of heat exchange tubes 4 exposed from the insulation sleeve 5 based on the seawater outlet temperature, ensuring that the heat exchanger outlet water temperature remains within a constant set range. This solves the problem of low chlorine production efficiency when the seawater temperature is too high or too low. The device has a simple structure and utilizes a sufficient heat source to heat the seawater, ensuring that the seawater inlet temperature of the seawater electrolysis device remains near the optimal electrolysis temperature, thereby improving system operating efficiency.

[0031] like Figure 3 and Figure 5 As shown, as an embodiment, heat exchanger housing 2 is provided with heat exchange tube mounting brackets 21 at both ends. Each heat exchange tube 4 is fixed to one of the two heat exchange tube mounting brackets 21 at both ends, and the two ends of the central shaft 3 are rotatably connected to the two heat exchange tube mounting brackets 21. Specifically, the two ends of the heat exchange tube 4 are threadedly connected to the heat exchange tube mounting caps 51. The two heat exchange tube mounting brackets 21 are provided with corresponding heat exchange tube mounting holes 214. The heat exchange tubes 4 are threadedly fixed to the heat exchange tube mounting holes 214 through the heat exchange tube mounting caps 51. A central shaft mounting hole 213 is provided in the middle of the two heat exchange tube mounting brackets 21. The two ends of the central shaft 3 pass through the central shaft mounting hole 213 and are rotatably connected to the heat exchange tube mounting brackets 21 via sealed bearings. The output end of the drive motor 1 is connected to one end of the drive shaft via a coupling, and the other end of the drive shaft is connected to the central shaft 3 via a coupling.

[0032] like Figure 4 As shown, as an embodiment, a heat exchanger housing 2 further includes an insulation jacket skeleton 6. The insulation jacket skeleton 6 is also spirally wound around the central axis 3 in the circumferential direction of the heat exchanger housing 2, so that the insulation jacket skeleton 6 corresponds to the curled shape of the insulation jacket 5. The insulation jacket 5 is supported by the insulation jacket skeleton 6. The provision of the insulation jacket skeleton 6 to support the insulation jacket 5 creates a gap between the insulation jacket 5 and the heat exchange tube 4, preventing the insulation jacket 5 from directly pressing against the heat exchange tube 4. This reduces friction between the insulation jacket 5 and the heat exchange tube 4, prevents the insulation jacket 5 from long-term wear on the heat exchange tube 4, reduces frictional damage to the heat exchange tube 4, and allows for smoother winding of the insulation jacket 5.

[0033] like Figure 4 As shown, as an embodiment, the insulation jacket frame 6 includes two insulation jacket side frames 61 located at both ends of the insulation jacket frame 6 and multiple central frame support rods 62 arranged along the axial direction of the heat exchanger shell 2 and connected between the two insulation jacket side frames 61. Each insulation jacket side frame 61 is formed by a plurality of hinged side frame units 611. Furthermore, the side frame units 611 and the central frame support rods 62 are threadedly connected. By hingedly connecting multiple side frame units 611 to form the insulation jacket side frames 61, insulation jacket side frames 61 of appropriate sizes can be flexibly assembled according to the size of the heat exchanger. Furthermore, multiple side frame units 611 can be produced at once and then assembled into insulation jacket side frames 61 of different sizes according to the different heat exchanger shell 2 size requirements. However, insulation jacket side frames 61 formed in one piece have limited applicability. For heat exchangers of different sizes, customized insulation jacket side frames 61 that meet the requirements must be made, which significantly affects the production cycle of the device and increases production costs.

[0034] like Figure 5As shown, as an embodiment, each heat exchange tube fixing frame 21 is fixed with a heat insulation sleeve support frame 211 on the inner side surface near the heat insulation sleeve frame 6. The heat insulation sleeve support frame 211 is arranged in a spiral shape, and a slide groove 212 is defined in the heat insulation sleeve support frame 211. The two heat insulation sleeve side frames 61 are respectively received in the slide grooves 212 on the inner side surfaces of the two heat exchange tube fixing frames 21, and the heat insulation sleeve support frames 211 support the heat insulation sleeve side frames 61. When the drive motor 1 rotates and drives the heat insulation sleeve 5 to retract or release, the heat insulation sleeve side frames 61 slide in the slide grooves 212. By fixing a spiral insulation sleeve support frame 211 on the inner surface of the heat exchange tube fixing frame 21 and providing a spiral slide groove 212 in the insulation sleeve support frame 211, the insulation sleeve side frame 61 can be supported by the insulation sleeve support frame 211, and the insulation sleeve side frame 61 can slide in the slide groove 212, so that the driving motor 1 can drive the insulation sleeve side frame 61 to rotate to achieve retraction or release, thereby achieving the retraction or release of the insulation sleeve 5 installed on the insulation sleeve frame 6.

[0035] like Figure 4 and Figure 7 As shown, as an embodiment, each side frame unit 611 is connected to at least two central frame support rods 62 to form an insulation sleeve frame unit 63. Specifically, each side frame unit 611 can be connected to two central frame support rods 62 to form an insulation sleeve frame unit 63. The insulation sleeve frame 6 includes multiple insulation sleeve frame units 63, and the insulation sleeve 5 includes multiple insulation sleeve units 52. Each insulation sleeve unit 52 corresponds to an insulation sleeve frame unit 63 and is attached to a corresponding insulation sleeve frame unit 63 to form an insulation unit 7. In this embodiment, one insulation sleeve unit 52 is bonded to one side of a corresponding insulation sleeve frame unit 63 to form an insulation unit 7. In this way, multiple insulation units 7 are hinged together to form an insulation sleeve 5 that integrally covers the upper and lower sides of the heat exchange tube 4. By dividing the entire insulation sleeve 5 into multiple insulation units 7, it is easier to repair and replace deformed or damaged insulation units 7, eliminating the need to discard the entire insulation sleeve 5 due to partial damage, thus saving costs. Furthermore, by connecting the insulation sleeve 5 into a single unit, the insulation units 7 can be mass-produced and then assembled into insulation sleeves 5 of varying sizes as needed, providing greater adaptability. This avoids the need to custom-make insulation sleeves 5 of varying sizes for heat exchangers of varying sizes, reduces inventory pressure and the initial investment required to produce insulation sleeves 5 of varying sizes, and significantly saves production time and costs. Furthermore, the processing method employed for the insulation units 7 allows the completed insulation units 7 to be stacked, significantly saving storage space and pressure, making the device more economical.

[0036] like Figure 7As shown, as an embodiment, the heat insulation sleeve unit 52 is attached to a side surface of the corresponding heat insulation sleeve skeleton unit 63 by gluing to form the heat insulation unit 7, but it is not limited thereto.

[0037] like Figure 1 As shown in the figure, as one embodiment, the heat exchanger housing 2 includes a heat exchanger inlet housing 22, a heat exchanger main housing 23, and a heat exchanger outlet housing 24, which are connected in sequence. The heat exchanger main housing 23 is provided with a seawater inlet 231 and a seawater outlet 232. The heat exchanger inlet housing 22 is provided with a heat exchange medium inlet 221, and the heat exchanger outlet housing 24 is provided with a heat exchange medium outlet 241. Specifically, the housings may be connected by, but are not limited to, flanges. The heat exchange medium may be, but is not limited to, heated ethylene glycol aqueous solution or water.

[0038] The present invention also provides an electrolytic chlorine production system, comprising the heat exchange device for the electrolytic chlorine production system as described above.

[0039] As one embodiment, the electrolysis chlorine production system further includes a temperature sensor (not shown) and a controller (not shown). The temperature sensor is used to detect the seawater outlet temperature of the heat exchanger housing 2. The controller is electrically connected to the temperature sensor and the drive motor 1, respectively. The controller controls the drive motor 1 to start or stop based on the seawater outlet temperature detected by the temperature sensor. During operation, the temperature sensor measures the seawater temperature at the seawater outlet 232. The controller controls the drive motor 1 to start or stop by comparing the seawater outlet temperature with a set standard temperature. Seawater flows into the heat exchanger shell 2 from the seawater inlet 231 and flows out from the seawater outlet 232 of the heat exchanger shell 2. The controller sets a standard temperature based on the detected seawater outlet temperature of the heat exchanger shell 2. If the seawater outlet temperature is lower than the set standard temperature, the drive motor 1 rotates to drive the insulation sleeve frame 6 and the insulation sleeve 5 to rotate in one direction, so that the insulation sleeve 5 is retracted, reducing the coverage of the insulation sleeve 5 on the heat exchange tube 4, allowing more heat exchange tubes 4 to be exposed from the opening 51, increasing the contact area between the heat exchange tube 4 and the seawater, and increasing the seawater outlet temperature, so that the seawater outlet temperature reaches the set standard temperature; conversely, if the seawater outlet temperature is higher than the set standard temperature, the drive motor 1 rotates to drive the insulation sleeve frame 6 and the insulation sleeve 5 to rotate in the opposite direction, so that the insulation sleeve 5 is released, increasing the coverage of the insulation sleeve 5 on the heat exchange tube 4, reducing the contact area between the heat exchange tube 4 and the seawater, and lowering the seawater outlet temperature, so that the seawater outlet temperature reaches the set standard temperature. When the seawater outlet temperature remains within the set standard temperature range, the drive motor 1 stops working and maintains the existing number of heat exchange tubes 4 to exchange heat with the seawater in the heat exchanger shell 2, thereby ensuring that the temperature at the seawater outlet 232 of the heat exchanger shell 2 remains stable.

[0040] The present invention arranges heat exchange tubes 4 arranged spirally around a central axis 3 within a heat exchanger housing 2. Insulation sleeves 5 are spirally wound around the central axis 3 and cover the upper and lower sides of the heat exchange tubes 4. When the drive motor 1 rotates, the central axis 3 rotates, which in turn drives the insulation sleeve 5 to retract or release, allowing multiple heat exchange tubes 4 to be exposed outside the insulation sleeve 5 or stored within the insulation sleeve 5 through openings 51 at the ends of the insulation sleeve 5. This allows the number of heat exchange tubes 4 exposed from the insulation sleeve 5 to be adjusted according to the temperature at the seawater outlet, ensuring the stability of the heat exchanger's outlet water temperature and resolving the problem of low chlorine production efficiency due to excessively high or low seawater temperatures. The device has a simple structure and can utilize a sufficient heat source to ensure that the water inlet temperature of the seawater electrolysis device remains near the optimal electrolysis temperature, thereby improving system operating efficiency.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A heat exchange device for an electrolytic chlorine production system, characterized in that: The invention comprises a driving motor (1) and a heat exchanger shell (2), wherein a central axis (3), a plurality of heat exchange tubes (4) and a heat insulation sleeve (5) are provided in the heat exchanger shell (2), wherein the central axis (3) is arranged in the middle of the heat exchanger shell (2) along the axial direction of the heat exchanger shell (2), the plurality of heat exchange tubes (4) are arranged along the axial direction of the heat exchanger shell (2) and are arranged in a spiral shape around the central axis (3) in the circumferential direction of the heat exchanger shell (2), and the heat insulation sleeve (5) is spirally wound around the central axis (3) in the circumferential direction of the heat exchanger shell (2) and covers the upper and lower sides of the heat exchange tubes (4), so that The plurality of heat exchange tubes (4) are housed in the heat insulation sleeve (5); the heat insulation sleeve (5) is fixedly connected to the center shaft (3) at its starting end close to the center shaft (3); an opening (51) is formed at the end of the heat insulation sleeve (5) away from the center shaft (3); the drive motor (1) is connected to the center shaft (3); when the drive motor (1) rotates, the center shaft (3) is driven to rotate, and the center shaft (3) drives the heat insulation sleeve (5) to be retracted or released, so that the plurality of heat exchange tubes (4) can be exposed outside the heat insulation sleeve (5) through the opening (51) or housed inside the heat insulation sleeve (5).

2. The heat exchange device for the electrolytic chlorine production system according to claim 1, characterized in that: Heat exchange tube fixing frames (21) are provided at both ends of the heat exchanger shell (2), and both ends of each heat exchange tube (4) are respectively fixed to the two heat exchange tube fixing frames (21), and both ends of the central axis (3) are rotatably connected to the two heat exchange tube fixing frames (21).

3. The heat exchange device for the electrolytic chlorine production system according to claim 2, characterized in that: A heat-insulating sleeve skeleton (6) is also provided in the heat exchanger shell (2). The heat-insulating sleeve skeleton (6) is also spirally wound around the central axis (3) in the circumferential direction of the heat exchanger shell (2). The heat-insulating sleeve (5) is supported by the heat-insulating sleeve skeleton (6).

4. The heat exchange device for the electrolytic chlorine production system according to claim 3, characterized in that: The thermal insulation sleeve frame (6) comprises two thermal insulation sleeve side frames (61) located at both ends of the thermal insulation sleeve frame (6) and a plurality of central frame support rods (62) arranged along the axial direction of the heat exchanger shell (2) and connected between the two thermal insulation sleeve side frames (61). Each thermal insulation sleeve side frame (61) is formed by hingedly connecting a plurality of side frame units (611).

5. The heat exchange device for the electrolytic chlorine production system according to claim 4, characterized in that: Each of the heat exchange tube fixing frames (21) is fixed with a heat insulation sleeve support frame (211) on the inner surface close to the heat insulation sleeve frame (6), and the heat insulation sleeve support frame (211) is spirally arranged. A slide groove (212) is defined in the heat insulation sleeve support frame (211). The two heat insulation sleeve side frames (61) are respectively accommodated in the slide grooves (212) on the inner surfaces of the two heat exchange tube fixing frames (21). When the drive motor (1) rotates and drives the heat insulation sleeve (5) to be retracted or released, the heat insulation sleeve side frames (61) slide in the slide groove (212).

6. The heat exchange device for the electrolytic chlorine production system according to claim 4, characterized in that: Each side frame unit (611) is connected to at least two central frame support rods (62) to form a heat insulation sleeve frame unit (63); the heat insulation sleeve (5) includes a plurality of heat insulation sleeve units (52); each heat insulation sleeve unit (52) corresponds to a heat insulation sleeve frame unit (63) and is attached to a corresponding heat insulation sleeve frame unit (63) to form a heat insulation unit (7).

7. The heat exchange device for the electrolytic chlorine production system according to claim 6, characterized in that: The heat insulation sleeve unit (52) is adhered to a side surface of the corresponding heat insulation sleeve skeleton unit (63) to form the heat insulation unit (7).

8. The heat exchange device for an electrolytic chlorine production system according to any one of claims 1 to 7, characterized in that: The heat exchanger shell (2) comprises a heat exchanger inlet shell (22), a heat exchanger main shell (23) and a heat exchanger outlet shell (24) connected in sequence; the heat exchanger main shell (23) is provided with a seawater inlet (231) and a seawater outlet (232); the heat exchanger inlet shell (22) is provided with a heat exchange medium inlet (221); and the heat exchanger outlet shell (24) is provided with a heat exchange medium outlet (241).

9. An electrolytic chlorine production system, characterized in that: The invention comprises a heat exchange device for an electrolytic chlorine production system as described in any one of claims 1 to 8.

10. The electrolytic chlorine production system according to claim 9, characterized in that: The electrolytic chlorine production system further comprises a temperature sensor and a controller, wherein the temperature sensor is used to detect the seawater outlet temperature of the heat exchanger housing (2), and the controller is electrically connected to the temperature sensor and the drive motor (1) respectively, and the controller controls the drive motor (1) to start or stop according to the seawater outlet temperature detected by the temperature sensor.

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