Water pretreatment device for seawater source heat pump

Abstract

The invention provides a water pretreatment device for a seawater source heat pump, and relates to the field of seawater source heat pumps. The water pretreatment device for the seawater source heat pump comprises a heat exchanger, a coarse filtering mechanism, a fine filtering mechanism and an additive feeding mechanism are sequentially arranged at the inlet end of the heat exchanger in the seawater inflow direction, seawater circulates in the tube pass of the heat exchanger, and heat exchange water circulates in the shell pass of the heat exchanger. Sacrificial electrodes fixedly connected with the heat exchange tubes are arranged in the shell, and rubber balls which are larger than the heat exchange tubes in diameter and can pass through the heat exchange tubes through extrusion deformation are arranged in the heat exchange tubes. According to the water pretreatment device for the seawater source heat pump, the multiple rubber balls are arranged to move in the heat exchange pipe and connected through the connecting rope, the rubber balls can be driven to rotate through rotation of the reversing wheel, and therefore the heat exchange pipe can be cleaned, and compared with freestyle rubber balls, a ball catching mechanism and a pressurizing mechanism for driving the rubber balls to move need to be arranged; by adopting the method, the heat exchange tube can be cleaned more simply and continuously.

Description

Technical Field

[0001] This invention relates to the field of marine heat pumps, specifically to a pretreatment device for water used in a seawater source heat pump. Background Technology

[0002] The working principle of a seawater source heat pump unit is to collect a large amount of low-grade energy in seawater, and with the help of a compressor system, consume a small amount of electricity to "extract" the low-grade energy stored in seawater in winter to heat the building; in summer, it "extracts" the energy inside the building and releases it into the seawater to regulate the indoor temperature.

[0003] CN104226015B A comprehensive seawater treatment system using a seawater source heat pump, characterized in that the filter has a cylindrical shell, one end of which has a central inlet cap, and the other end has an outlet cap and a baffle plate. The baffle plate is connected to the outlet cap via a pad. Interlocking filter cylinders are located inside the main cylinder. The hydrocyclone is integrally formed, with the lower end of the outlet pipe inserted into the upper end of the conical cylinder. The pipe wall has permeable holes and is fitted with a filter screen. The other end of the outlet pipe extends out of the cylindrical body and is sealed to the upper end cap. A sand guide groove is located on the inner wall of the conical cylinder. The gas-water separator has a base plate with side plates vertically connected to both sides. The inlet end of the side plates is lower than the outlet end. The side plates are composed of a top plate forming a conical cylinder. Both ends of the cylinder are capped. An exhaust port is located on the top plate at the outlet end. A drainage plate is located inside the cylinder. This system has advantages such as long service life, convenient maintenance, low noise, and high working efficiency. This technical solution provides the basis for the pretreatment required for seawater source heat pump water.

[0004] CN217830993U discloses an automatic cleaning system for a wastewater source heat pump, belonging to the field of wastewater source heat pump technology. Although wastewater source heat pumps and seawater source heat pumps have different heat sources, they both face the problem of pipe scaling requiring cleaning. The system includes a wastewater source heat pump water delivery pipe, a ball pump, a ball collector, and a ball washing shell. The ball pump is installed on one side of the wastewater source heat pump water delivery pipe, and the ball collector is installed on the other side. A ball washing shell is installed on the outside of one side of the ball collector, and a collection structure for rolling and collecting the balls is installed inside the ball washing shell. This technical solution expands the range of ball washing through the cleaning pump, cleaning nozzle, and rotating spray head, enabling more comprehensive cleaning of the balls and ensuring cleaning efficiency and cleanliness. This increases the practicality of the device. The easily removable and replaceable cleaning rollers perform secondary cleaning of the balls, thereby reducing the labor intensity of workers and saving on the cost of ball cleaning, increasing the practicality and widespread use of this device. However, the process of cleaning the heat exchange pipes with rubber balls in this technical solution is quite complicated and requires individual treatment of each rubber ball. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pretreatment device for seawater source heat pump water, which solves the problem of inconvenient cleaning of seawater scaling mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pretreatment device for seawater source heat pump water, comprising a heat exchanger. The inlet end of the heat exchanger is sequentially equipped with a coarse filtration mechanism, a fine filtration mechanism, and an additive dispensing mechanism according to the seawater inflow direction. The heat exchanger includes a shell and heat exchange tubes, with the heat exchange tubes disposed inside the shell. Seawater circulates in the tube side of the heat exchanger, while hot water circulates in the shell side. A sacrificial electrode, fixedly connected to the heat exchange tubes, is disposed inside the shell. A rubber ball with a diameter larger than the heat exchange tubes and capable of being squeezed and deformed through the heat exchange tubes is disposed inside the heat exchange tubes. The rubber balls inside adjacent heat exchange tubes are fixed by connecting ropes. Reversing wheels, fitted inside the inlet and outlet shells, are fixedly installed and sleeved on the inner rings of the rubber balls and connecting ropes. The reversing wheels are rotatably connected to the shell. A retaining groove for accommodating the rubber balls is formed on the surface of the reversing wheels. One of the reversing wheels is connected to a power source that drives the reversing wheel to rotate and causes the rubber balls to rub against each other inside the heat exchange tubes.

[0007] Preferably, one end of the rubber ball has a placement opening, and a sacrificial block made of the same material as the sacrificial electrode is placed inside the placement opening. The connecting rope is made of conductive material and is connected to the sacrificial block. The outer ring of the commutator wheel is inlaid with a conductive semi-ring plate that contacts the connecting rope. A conductive connecting plate is inlaid on one end face of the commutator wheel. The conductive connecting plate is connected to the conductive semi-ring plate. A conductive rotating ring is provided at the end of the conductive connecting plate away from the commutator wheel. A conductive fixing ring is provided on the outside of the conductive rotating ring and is sleeved on the outside of the conductive rotating ring. The conductive fixing ring is conductively connected to the sacrificial electrode and fixedly connected.

[0008] Preferably, the center of the rubber ball is provided with a through hole to allow seawater to pass through and to allow the seawater to contact the sacrificial block, and there is an acute angle between the placement opening and the through hole.

[0009] Preferably, the placement opening is a stepped hole, and the top part of the sacrificial block is threaded into the interior of the stepped hole.

[0010] Preferably, the rubber ball is divided into an inner fixing layer and an outer elastic layer, and the diameter of the inner fixing layer is smaller than the diameter of the heat exchange tube.

[0011] Preferably, the inner fixing layer of the rubber ball is provided with threaded grooves at both ends, and a threaded post is threadedly connected inside the threaded groove. The threaded post is rotatably connected to the connecting rope. A spring head is provided on the end face of the threaded post. The spring head clamps the sacrificial block. The spring head, the threaded post and the connecting rope are all made of a metal with a lower reactivity than the sacrificial block.

[0012] Preferably, the outer shell includes caps for the inlet and outlet ends, and the two caps are connected to the middle cylinder via flanges. The entire outer surface of the heat exchange tube is fitted with fins, and the two ends of the heat exchange tube are fixedly connected by connecting discs. The two ends of the cylinder are provided with bearing slots for accommodating the connecting discs. A sealing gasket is provided at the connection between the bearing slot and the connecting disc. Both the sealing gasket and the connecting disc are made of insulating material. A fixing disc of the same material as the heat exchange tube is fixedly installed at one end of the heat exchange tube, and the sacrificial electrode is located above the fixing disc and is tightly fitted to the fixing disc.

[0013] Preferably, the coarse filtration mechanism includes a bar screen and a rotating filter screen installed downstream of the water flow, and the fine filtration mechanism includes a multi-media filter.

[0014] Preferably, the additive dispensing mechanism includes a dispensing tank connected in the pipeline, and the dispensing tank is equipped with at least a scale inhibitor and a strong oxidizing bactericide.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The pretreatment device for the seawater source heat pump uses multiple rubber balls that move inside the heat exchange tubes and are connected by connecting ropes. The rotation of the reversing wheel drives the rubber balls to rotate, thereby cleaning the heat exchange tubes. Compared with free-type rubber balls, which require a ball-catching mechanism and a pressurizing mechanism to drive the rubber balls, this method is simpler and more continuous in cleaning the heat exchange tubes.

[0017] 2. This seawater source heat pump water pretreatment device, by placing the sacrificial block inside the rubber ball, and the connecting rope being made of conductive material and connected to the sacrificial block, has a conductive semi-ring plate embedded in the outer ring of the commutator wheel that contacts the connecting rope. A conductive connecting plate is embedded in one end face of the commutator wheel and is connected to the conductive semi-ring plate. A conductive rotating ring is set at the end of the conductive connecting plate away from the commutator wheel. A conductive fixing ring is set on the outside of the conductive rotating ring and is connected to the sacrificial electrode. This arrangement allows the sacrificial block and the sacrificial electrode to jointly form the sacrificial part and maintain the connection of the heat exchange tube. The evenly distributed sacrificial block can better prevent internal corrosion of the heat exchange tube.

[0018] 3. The pretreatment device for the seawater source heat pump has threaded grooves at both ends of the inner fixing layer of the rubber ball. The threaded grooves are connected to threaded columns, which are rotatably connected to the connecting rope. The end face of the threaded column is provided with a spring head, which holds the sacrificial block. This arrangement allows the rubber ball and the connecting rope to be separated by rotating the threaded column, as well as the spring head and the sacrificial block, thus facilitating the replacement of the rubber ball.

[0019] 4. In this seawater source heat pump water pretreatment device, the spring head, threaded column, and connecting rope are all made of metals with lower reactivity than the sacrificial block. Similarly, the conductive parts connected to the commutator wheel are also made of metals with lower reactivity than the sacrificial block. This design can prevent corrosion from affecting the strength, thus ensuring that only the sacrificial electrode and sacrificial block are sacrificed, and protecting the entire device from corrosion.

[0020] 5. The pretreatment device for the seawater source heat pump uses a connecting plate to support the heat exchange tubes. Both ends of the cylinder are equipped with bearing slots to accommodate the connecting plate. A sealing gasket is installed at the connection between the bearing slot and the connecting plate. This design can achieve a sealing effect and prevent seawater from entering the shell side. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the heat exchanger connection of the present invention;

[0023] Figure 3 This is a schematic diagram of the outer casing connection of the present invention;

[0024] Figure 4 This is a schematic diagram of the sacrificial electrode connection of the present invention;

[0025] Figure 5 This is a schematic diagram of the reversing wheel connection of the present invention;

[0026] Figure 6 This is a schematic diagram of the commutator wheel of the present invention;

[0027] Figure 7 This is a schematic diagram of the conductive rotating ring connection of the present invention;

[0028] Figure 8 This is a half-sectional schematic diagram of the rubber ball of the present invention;

[0029] Figure 9 This is a schematic diagram of the spring head connection of the present invention.

[0030] In the diagram: 1. Heat exchanger; 2. Coarse filtration mechanism; 3. Fine filtration mechanism; 4. Additive dispensing mechanism; 101. Outer shell; 102. Heat exchange tube; 103. Sacrificial electrode; 5. Glue ball; 6. Connecting rope; 7. Reversing wheel; 8. Snap-fit ​​groove; 9. Power source; 10. Placement port; 11. Sacrificial block; 12. Conductive semi-ring plate; 13. Conductive connecting plate; 14. Conductive rotating ring; 15. Conductive fixing ring; 16. Through hole; 51. Inner fixing layer; 52. Outer elastic layer; 17. Threaded column; 18. Spring head; 19. Threaded groove; 20. Cover; 26. Cylinder; 21. Fin; 22. Connecting plate; 23. Bearing slot; 24. Sealing gasket; 25. Fixing plate; 41. Dispensing pool. Detailed Implementation

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0035] like Figure 1-9 As shown, a seawater source heat pump water pretreatment device includes a heat exchanger 1. At the inlet end of the heat exchanger 1, a coarse filtration mechanism 2 and a fine filtration mechanism 3 are sequentially arranged according to the seawater inflow direction. The coarse filtration mechanism 2 includes a grid and a rotating filter screen installed downstream of the water flow. The grid and rotating filter screen can filter out coarse particulate impurities. The fine filtration mechanism 3 includes a multi-media filter, which includes a filter media layer composed of quartz sand, anthracite, etc., to trap suspended impurities in the water. An additive dosing mechanism 4 is also included. The additive dosing mechanism 4 includes a dosing tank 41 connected to a pipeline. The dosing tank 41 contains at least a scale inhibitor and a strong oxidizing bactericide. Dosing the scale inhibitor reduces scale formation, and dosing the strong oxidizing bactericide prevents bacteria from multiplying inside the pipeline.

[0036] The heat exchanger 1 includes a shell 101 and heat exchange tubes 102. The heat exchange tubes 102 are disposed inside the shell 101. Seawater circulates in the tube side of the heat exchanger 1, and hot water circulates in the shell side. A sacrificial electrode 103, made of a highly reactive metal, is fixedly connected to the heat exchange tubes 102 inside the shell 101. A rubber ball 5 with a diameter larger than the heat exchange tube 102 and capable of being squeezed and deformed through the heat exchange tube 102 is disposed inside the heat exchange tube 102. The rubber balls 5 inside two adjacent heat exchange tubes 102 are fixed by a connecting rope 6. A reversing wheel 7, fitted inside the shell 101 at the inlet end and the shell 101 at the outlet end, is fixedly installed and sleeved on the inner ring of the rubber ball 5 and the connecting rope 6. The reversing wheel 7 is rotatably connected to the shell 101. A retaining groove 8 for accommodating the rubber ball 5 is formed on the surface of the reversing wheel 7. One of the reversing wheels 7 is connected to a power source 9 that drives the reversing wheel 7 to rotate and causes the rubber balls 5 to rub against each other inside the heat exchange tube 102. The power source 9 includes a snap-fit ​​shaft that snaps into the reversing wheel 7 on the same horizontal plane. The snap-fit ​​shaft extends to the outside of the housing 101. A part that drives the snap-fit ​​shaft to rotate is provided on the outside of the housing 101. This can be a mechanical gear transmission or a liquid flow drive that connects the snap-fit ​​shaft to the blades. By setting multiple rubber balls 5 to move inside the heat exchange tube 102 and connecting the rubber balls 5 with connecting ropes 6, the rotation of the reversing wheel 7 can drive the rubber balls 5 to rotate, thereby cleaning the heat exchange tube 102. Compared with free rubber balls 5, which require a ball-catching mechanism and a pressurizing mechanism to drive the rubber balls 5 to move, this method is simpler and more continuous in achieving the cleaning of the heat exchange tube 102.

[0037] One end of the rubber ball 5 has a placement port 10. Inside the placement port 10, there is a sacrificial block 11 made of the same material as the sacrificial electrode 103. The connecting rope 6 is made of conductive material and is connected to the sacrificial block 11. The outer ring of the commutator 7 is inlaid with a conductive semi-ring plate 12 that contacts the connecting rope 6. One end face of the commutator 7 is inlaid with a conductive connecting piece 13, which is connected to the conductive semi-ring plate 12. A conductive rotating ring 14 is provided at the end of the conductive connecting piece 13 away from the commutator 7. A conductive fixing ring 15 is provided on the outside of the conductive rotating ring 14 and is sleeved on the outside of the conductive rotating ring 14. The conductive fixing ring 15 is conductively connected to the sacrificial electrode 103 and is fixedly connected. This arrangement allows the sacrificial block 11 and the sacrificial electrode 103 to jointly form the sacrificial part and keep the heat exchange tube 102 connected. The evenly distributed sacrificial blocks 11 can better prevent internal corrosion of the heat exchange tube 102.

[0038] The center of the ball 5 is provided with a through hole 16 to allow seawater to pass through and to allow the seawater to contact the sacrificial block 11. There is an acute angle between the placement port 10 and the through hole 16. By providing the through hole 16, liquid can flow through the through hole 16. By limiting the angle between the placement port 10 and the through hole 16, the edge of the ball 5 can be kept intact, so that it can rub against the inner wall of the heat exchange tube 102 through the edge.

[0039] The placement port 10 is a stepped hole, and the top part of the sacrificial block 11 is threaded into the inside of the stepped hole. With this setting, you can keep the sacrificial block 11 stable and prevent the sacrificial block 11 from falling off.

[0040] The rubber ball 5 is divided into an inner fixed layer 51 and an outer elastic layer 52. The diameter of the inner fixed layer 51 is smaller than the diameter of the heat exchange tube 102. Since the rubber ball 5 needs to be perforated and connected to the connecting rope 6, the inner layer needs to maintain a certain strength and the outer layer needs to be elastic. By expanding the overall diameter through the outer layer, it can rub against the inner wall of the heat exchange tube 102, thereby scraping away the dirt and microorganisms attached to the inside of the heat exchange tube 102.

[0041] The inner fixing layer 51 of the rubber ball 5 has threaded grooves 19 at both ends. The threaded grooves 19 are internally threaded with threaded posts 17. The threaded posts 17 are rotatably connected to the connecting rope 6. The end face of the threaded posts 17 is provided with a spring head 18. The spring head 18 clamps the sacrificial block 11. The spring head 18, the threaded posts 17 and the connecting rope 6 are all made of metal with lower reactivity than the sacrificial block 11. Similarly, the conductive part connected to the reversing wheel 7 is also made of metal with lower reactivity than the sacrificial block 11. This design can prevent corrosion from affecting the strength. At the same time, this design can separate the rubber ball 5 and the connecting rope 6 and the spring head 18 and the sacrificial block 11 by rotating the threaded posts 17, which makes it easy to replace the rubber ball 5.

[0042] The outer casing 101 includes inlet and outlet covers 20. The two covers 20 are connected to the central cylinder 26 via flanges. The covers 20 facilitate internal maintenance of the outer casing 101. The outer surface of the heat exchange tube 102 is fitted with fins 21, which increase heat exchange efficiency. The two ends of the heat exchange tube 102 are fixedly connected by connecting plates 22, which support the heat exchange tube 102. The two ends of the cylinder 26 are provided with bearing slots 23 to accommodate the connecting plates 22. A sealing gasket 24 is provided at the connection of the connecting plate 22. This setting can achieve a sealing effect and prevent seawater from entering the shell side. Both the sealing gasket 24 and the connecting plate 22 are made of insulating material. This setting can ensure that the sealing gasket 24 and the connecting plate 22 do not participate in electrochemical corrosion. One end of the heat exchange tube 102 is fixedly installed with a fixing plate 25 of the same material as the heat exchange tube 102. The sacrificial electrode 103 is located above the fixing plate 25 and is tightly attached to the fixing plate 25. The function of the fixing plate 25 is to maintain the connection with the sacrificial electrode 103.

[0043] In use, seawater is filtered by coarse filtration mechanism 2 and fine filtration mechanism 3 to reduce the content of sediment. Additives such as pH adjuster, scale inhibitor and strong oxidant are added by additive dosing mechanism 4 to adjust water quality. Seawater enters the tube side of heat exchanger 1 and circulates to the shell side of heat exchanger 1 to exchange hot water, and heat exchange is achieved through heat exchanger 1.

[0044] By setting reversing wheels 7 at both ends of the heat exchange tube 102, and driving the rubber ball 5 and connecting rope 6 to move inside the heat exchange tube 102 through the reversing wheels 7, the friction between the rubber ball 5 and the inner wall of the heat exchange tube 102 can scrape off dirt and microbial aggregates, thereby improving heat exchange efficiency.

[0045] In order to avoid electrochemical corrosion of the heat exchange tube 102, a sacrificial electrode 103 connected to the heat exchange tube 102 is provided to protect the heat exchange tube 102 by actively sacrificing itself.

[0046] Since the sacrificial electrode 103 set on the end face is small in volume, a sacrificial block 11 is set inside the ball 5. The conductive part ensures that the sacrificial block 11 is always electrically connected to the heat exchange tube 102 during rotation and movement, thereby increasing the volume of the sacrificial part and making the sacrificial part more evenly distributed in the entire heat exchanger 1, thus maintaining a good protection effect.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0048] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for seawater source heat pump water, comprising a heat exchanger (1), characterized in that: The heat exchanger (1) is provided with a coarse filtration mechanism (2), a fine filtration mechanism (3) and an additive dispensing mechanism (4) in sequence at the inlet end in accordance with the seawater inflow direction; The heat exchanger (1) includes a shell (101) and heat exchange tubes (102). The heat exchange tubes (102) are disposed inside the shell (101). Seawater is circulated in the tube side of the heat exchanger (1), and hot water is circulated in the shell side of the heat exchanger (1). The outer casing (101) is provided with a sacrificial electrode (103) that is fixedly connected to the heat exchange tube (102); The heat exchange tube (102) is provided with a rubber ball (5) with a diameter larger than the heat exchange tube (102) and capable of being squeezed and deformed through the heat exchange tube (102). The rubber balls (5) inside two adjacent heat exchange tubes (102) are fixed by a connecting rope (6). The inlet end shell (101) and the outlet end shell (101) are fixedly installed with a reversing wheel (7) that fits into the inner ring of the rubber ball (5) and the connecting rope (6). The reversing wheel (7) is rotatably connected to the shell (101). The surface of the reversing wheel (7) is provided with a snap-fit ​​groove (8) for accommodating the rubber ball (5). One of the reversing wheels (7) is connected to a power source (9) that drives the reversing wheel (7) to rotate and causes the rubber ball (5) to rub inside the heat exchange tube (102).

2. The pretreatment device for seawater source heat pump water according to claim 1, characterized in that: The ball (5) has a placement opening (10) at one end, and a sacrificial block (11) made of the same material as the sacrificial electrode (103) is placed inside the placement opening (10). The connecting rope (6) is made of conductive material and is connected to the sacrificial block (11). The outer ring of the commutator (7) is inlaid with a conductive semi-ring plate (12) that contacts the connecting rope (6). A conductive connecting plate (13) is inlaid on one end face of the commutator (7). The conductive connecting plate (13) is connected to the conductive semi-ring plate (12). A conductive rotating ring (14) is provided at the end of the conductive connecting plate (13) away from the commutator (7). A conductive fixing ring (15) is provided on the outside of the conductive rotating ring (14). The conductive fixing ring (15) is conductively connected to the sacrificial electrode (103) and fixedly connected.

3. The pretreatment device for seawater source heat pump water according to claim 2, characterized in that: The ball (5) has a through hole (16) in the middle to allow seawater to pass through and to allow seawater to contact the sacrificial block (11). There is an acute angle between the placement opening (10) and the through hole (16).

4. The pretreatment device for seawater source heat pump water according to claim 1, characterized in that: The placement opening (10) is a stepped hole, and the top part of the sacrificial block (11) is threaded into the interior of the stepped hole.

5. The pretreatment device for seawater source heat pump water according to claim 1, characterized in that: The ball (5) is divided into an inner fixing layer (51) and an outer elastic layer (52). The diameter of the inner fixing layer (51) is smaller than the diameter of the heat exchange tube (102).

6. The pretreatment device for seawater source heat pump water according to claim 1, characterized in that: The inner fixing layer (51) of the rubber ball (5) is provided with threaded grooves (19) at both ends. The threaded grooves (19) are connected to threaded columns (17) by threads. The threaded columns (17) are rotatably connected to the connecting rope (6). The end face of the threaded column (17) is provided with a spring head (18). The spring head (18) clamps the sacrificial block (11). The spring head (18), the threaded column (17) and the connecting rope (6) are all made of metal with lower reactivity than the sacrificial block.

7. The pretreatment device for seawater source heat pump water according to claim 1, characterized in that: The outer shell (101) includes a cover (20) for the water inlet and the water outlet. The two covers (20) are connected to the middle cylinder (26) by a flange. The outer surface of the heat exchange tube (102) is fitted with fins (21). The two ends of the heat exchange tube (102) are fixedly connected by a connecting plate (22). The two ends of the cylinder (26) are provided with a bearing slot (23) for accommodating the connecting plate (22). A sealing gasket (24) is provided at the connection between the bearing slot (23) and the connecting plate (22). The sealing gasket (24) and the connecting plate (22) are both made of insulating material. A fixing plate (25) of the same material as the heat exchange tube (102) is fixedly installed at one end of the heat exchange tube (102). The sacrificial electrode (103) is located above the fixing plate (25) and is tightly fitted to the fixing plate (25).

8. The pretreatment device for seawater source heat pump water according to claim 1, characterized in that: The coarse filtration mechanism (2) includes a bar screen and a rotating filter screen installed downstream of the water flow, and the fine filtration mechanism (3) includes a multi-media filter.

9. The pretreatment device for seawater source heat pump water according to claim 1, characterized in that: The additive dispensing mechanism (4) includes a dispensing tank (41) connected in the pipeline, and the dispensing tank (41) contains at least a scale inhibitor and a strong oxidizing bactericide.

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