A sea water desalination apparatus for a longline fishing vessel

Abstract

This invention provides a seawater desalination device for ocean-going fishing vessels. The device includes: a base plate; a seawater tank fixedly installed on the base plate; a filter box fixedly installed on top of the seawater tank; a pumping pipe mounted on the filter box; a submersible pump installed at one end of the pumping pipe; a filtration mechanism mounted on the filter box for filtering seawater; and a seawater desalination mechanism mounted on top of the base plate for desalinating seawater. The seawater desalination device for ocean-going fishing vessels provided by this invention has the advantages of facilitating quick installation, disassembly, and replacement of reverse osmosis filter elements, and providing seawater filtration functionality.

Description

Technical Field

[0001] This invention relates to the field of seawater desalination equipment technology, and in particular to a seawater desalination device for ocean-going fishing vessels. Background Technology

[0002] The core function of seawater desalination equipment on ocean-going fishing vessels (commonly known as "water makers" on board) is to convert seawater into fresh water to meet the needs of crew living, fish processing, and equipment cooling. The mainstream technology is reverse osmosis (SWRO), while the traditional technology is vacuum distillation.

[0003] However, the seawater desalination equipment used on existing ocean-going fishing vessels is often inconvenient for the quick installation, disassembly, and replacement of reverse osmosis filter elements.

[0004] Therefore, it is necessary to provide a seawater desalination device for ocean-going fishing vessels to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the technical problem that existing seawater desalination equipment used on ocean-going fishing vessels is inconvenient for the rapid installation, disassembly, and replacement of reverse osmosis filter elements, this invention provides a seawater desalination device for ocean-going fishing vessels.

[0006] The seawater desalination equipment for ocean-going fishing vessels provided by the present invention includes: a bottom plate; a seawater tank fixedly installed on the bottom plate; a filter box fixedly installed on the top of the seawater tank; a water pumping pipe installed on the filter box; a submersible pump installed at one end of the water pumping pipe; a filtration mechanism installed on the filter box for filtering seawater; and a seawater desalination mechanism installed on the top of the bottom plate for desalinating seawater.

[0007] Preferably, the filtration mechanism includes: a sealing plate disposed on the filter box; a sand filter element and a fine filter element mounted on the sealing plate; bolts disposed on the sealing plate and threadedly connected to the filter box; and a first sealing ring and a handle respectively mounted on both sides of the sealing plate.

[0008] Preferably, a scale inhibitor storage tank is fixedly installed on the top of the seawater tank, and a liquid filling pipe is provided on the scale inhibitor storage tank. One end of the liquid filling pipe extends into the interior of the seawater tank, and a liquid filling valve is provided on the liquid filling pipe.

[0009] Preferably, the seawater desalination mechanism includes: a frame fixedly installed on the top of the base plate; a support plate fixedly installed on the inner wall of the frame; a first insertion hole opened on the support plate, with a concentrated water conduit at the bottom of the first insertion hole and a concentrated water manifold at the bottom end of the concentrated water conduit; a second insertion hole opened on the support plate, with a desalinated water conduit at the bottom of the second insertion hole and a desalinated water manifold at one end of the desalinated water conduit; a connecting plate fixedly installed on the inner wall of the frame; and a screw rotatably installed on the connecting plate and rotatably connected to the inner wall of the frame. The following components are included: a lifting plate threaded onto the screw; a dual-shaft motor fixedly mounted on the inner wall of the top of the frame; a transmission rod mounted on the output shaft of the dual-shaft motor via a coupling; a bevel gear fixedly mounted on one end of the transmission rod and meshing with the screw; a connecting seat fixedly mounted at the bottom of the lifting plate; a multi-port pipe fixedly mounted on the lifting plate; a water guide pipe mounted on the multi-port pipe and connected to the connecting seat; a booster pump mounted on the seawater tank; a seawater conduit mounted on the booster pump and connected to the multi-port pipe; and a filter element structure mounted on the support plate.

[0010] Preferably, the filter element structure includes: a reverse osmosis filter element disposed on the top of the support plate; an inlet installed on the reverse osmosis filter element; an upper sleeve fixedly sleeved on the inlet; a second sealing ring installed on the upper sleeve; and a concentrated water outlet and a desalinated water outlet installed at the bottom of the reverse osmosis filter element.

[0011] Preferably, a lower sleeve plate is fixedly fitted on both the concentrated water outlet and the desalinated water outlet, and a third sealing ring is provided at the bottom of the lower sleeve plate.

[0012] Preferably, a water storage tank is fixedly installed on the top of the base plate, the water storage tank is connected to the desalinated water manifold, a water intake pipe is provided on the water storage tank, and a water intake valve is provided on the water intake pipe.

[0013] Preferably, a UV germicidal lamp is installed on the inner wall of the water storage tank, and a transparent waterproof lamp cover is installed on the UV germicidal lamp.

[0014] Preferably, a salinity sensor is installed on the bottom inner wall of the water storage tank, and a radar level sensor is installed on the top inner wall of the seawater tank.

[0015] Preferably, a drain pipe is provided at the bottom of the filter box, and the bottom end of the drain pipe extends into the interior of the seawater tank.

[0016] Compared with related technologies, the seawater desalination equipment for ocean-going fishing vessels provided by this invention has the following beneficial effects: This invention provides a seawater desalination device for ocean-going fishing vessels. A seawater tank stores seawater to be desalinated, and a filter box houses the filtration mechanism. A submersible pump draws seawater into the filter box via a suction pipe. The filtration mechanism removes suspended solids, silt, and large particles from the seawater. The desalination mechanism provides efficient desalination and facilitates filter element replacement. A sand filter and a fine filter provide two-stage filtration, removing suspended solids, silt, and large particles. The filtered seawater is temporarily stored in the seawater tank via a drain pipe at the bottom of the filter box. A sealing plate is bolted to the filter box, a first sealing ring ensures a tight seal, and a handle facilitates filter element disassembly and maintenance. A scale inhibitor storage tank stores scale inhibitor solution, which is added quantitatively to the seawater tank via a filling pipe and valve to prevent scaling and clogging of the subsequent reverse osmosis filter element, extending its service life. The pre-treated seawater in the tank is pressurized by a booster pump and sent through a seawater conduit into a multi-port pipe, then distributed through a water pipe. Each reverse osmosis filter element is connected to a dual-shaft motor that drives the screws on both sides to rotate synchronously via a transmission rod and bevel gear. This causes the lifting plate to move the connecting seat downwards, pressing the inlet of the reverse osmosis filter element. High-pressure seawater enters from the inlet of the reverse osmosis filter element and is separated into desalinated water and concentrated seawater under the action of the reverse osmosis membrane. The desalinated water flows out from the outlet and merges into the desalinated water manifold through the desalinated water conduit. The concentrated seawater flows out from the outlet and merges into the concentrated water manifold through the concentrated water conduit and is discharged. The desalinated water is stored in the water storage tank. The upper sleeve plate and the second sealing ring, and the lower sleeve plate and the third sealing ring respectively ensure reliable sealing of the inlet and outlet ends to prevent leakage and cross-contamination. The UV sterilization lamp tube inside the tank, together with the transparent waterproof lamp cover, continuously sterilizes the freshwater with ultraviolet light to ensure drinking water safety. The salinity of the freshwater is monitored in real time by a salinity sensor to ensure that the desalination meets the standards. The seawater level in the seawater tank can be monitored by a radar level sensor. The filtered seawater can be introduced into the seawater tank through the drain pipe. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of the seawater desalination equipment for ocean-going fishing vessels provided by the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram of a reverse osmosis filter element; Figure 3 for Figure 1 An enlarged schematic diagram of part A shown in the image; Figure 4 for Figure 1 An enlarged schematic diagram of part B shown in the image; Figure 5 for Figure 1 An enlarged schematic diagram of part C shown in the figure; Figure 6 for Figure 1 An enlarged schematic diagram of part D shown; Figure 7 for Figure 1 The enlarged schematic diagram of part E shown in the figure.

[0018] Numbered in the diagram: 1. Base plate; 2. Seawater tank; 3. Filter box; 4. Pump pipe; 5. Submersible pump; 6. Sealing plate; 7. Sand filter element; 8. Fine filter element; 9. Bolt; 10. First sealing ring; 11. Handle; 12. Scale inhibitor storage tank; 13. Filling pipe; 14. Filling valve; 15. Frame; 16. Support plate; 17. First insertion hole; 18. Concentrated water conduit; 19. Concentrated water manifold; 20. Second insertion hole; 21. Desalinated water manifold; 22. Desalinated water conduit; 23. Connecting plate; 24. Screw; 25. 26. Lifting plate; 27. Dual-shaft motor; 28. Transmission rod; 29. ​​Bevel gear; 20. Connecting seat; 31. Multi-port pipe; 32. Water guide pipe; 33. Booster pump; 34. Seawater guide pipe; 35. Reverse osmosis filter element; 36. Water inlet; 37. Upper sleeve plate; 38. Second sealing ring; 39. Concentrated water outlet; 40. Desalinated water outlet; 41. Lower sleeve plate; 42. Third sealing ring; 43. Water storage tank; 44. Water intake pipe; 45. Water intake valve; 46. UV germicidal lamp tube; 47. Transparent waterproof lamp cover; 48. Salinity sensor. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please refer to the following: Figure 1-7 ,in, Figure 1 A schematic diagram of a preferred embodiment of the seawater desalination equipment for ocean-going fishing vessels provided by the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram of a reverse osmosis filter element; Figure 3 for Figure 1 An enlarged schematic diagram of part A shown in the image; Figure 4 for Figure 1 An enlarged schematic diagram of part B shown in the image; Figure 5 for Figure 1 An enlarged schematic diagram of part C shown in the figure; Figure 6 for Figure 1 An enlarged schematic diagram of part D shown; Figure 7 for Figure 1The enlarged schematic diagram of part E shown in the figure. The seawater desalination equipment for ocean-going fishing vessels includes: a base plate 1; a seawater tank 2 fixedly installed on the base plate 1; a filter box 3 fixedly installed on the top of the seawater tank 2; a water pumping pipe 4 installed on the filter box 3; a submersible pump 5 installed at one end of the water pumping pipe 4; a filtration mechanism installed on the filter box 3 for filtering seawater; and a seawater desalination mechanism installed on the top of the base plate 1 for desalinating seawater. The seawater tank 2 stores seawater to be desalinated, the filter box 3 houses the filtration mechanism, the submersible pump 5 pumps external seawater into the filter box 3 through the water pumping pipe 4, the filtration mechanism removes suspended solids, silt, and large particulate impurities from the seawater, and the seawater desalination mechanism efficiently desalinates the seawater and facilitates filter replacement.

[0021] The filtration mechanism includes: a sealing plate 6 mounted on the filter box 3; a sand filter element 7 and a fine filter element 8 mounted on the sealing plate 6; bolts 9 mounted on the sealing plate 6 and threadedly connected to the filter box 3; first sealing rings 10 and handles 11 respectively mounted on both sides of the sealing plate 6. The sand filter element 7 and the fine filter element 8 can perform two-stage filtration of seawater to remove suspended solids, silt and large particulate impurities from the seawater. The filtered seawater enters the seawater tank 2 for temporary storage through the drain pipe at the bottom of the filter box 3. The sealing plate 6 is fixed to the filter box 3 by bolts 9, the first sealing rings 10 ensure a seal, and the handles 11 facilitate the disassembly and maintenance of the filter elements.

[0022] A scale inhibitor storage tank 12 is fixedly installed on the top of the seawater tank 2. A liquid addition pipe 13 is provided on the scale inhibitor storage tank 12. One end of the liquid addition pipe 13 extends into the interior of the seawater tank 2. A liquid addition valve 14 is provided on the liquid addition pipe 13. Scale inhibitor is stored in the scale inhibitor storage tank 12. Scale inhibitor is added quantitatively into the seawater tank 2 through the liquid addition pipe 13 and the liquid addition valve 14 to prevent subsequent reverse osmosis filter element 34 from scaling and clogging, thereby extending its service life.

[0023] The seawater desalination mechanism includes: a frame 15 fixedly installed on the top of the base plate 1; a support plate 16 fixedly installed on the inner wall of the frame 15; a first insertion hole 17 opened on the support plate 16, with a concentrated water conduit 18 at the bottom of the first insertion hole 17 and a concentrated water manifold 19 at the bottom end of the concentrated water conduit 18; and a second insertion hole 20 opened on the support plate 16, with a desalinated water conduit 22 at the bottom of the second insertion hole 20 and a desalinated water manifold 21 at one end of the desalinated water conduit 22. The following components are included: a connecting plate 23 fixedly installed on the inner wall of the frame 15; a screw 24 rotatably installed on the connecting plate 23 and rotatably connected to the inner wall of the frame 15; a lifting plate 25 threaded onto the screw 24; a dual-shaft motor 26 fixedly installed on the top inner wall of the frame 15; a transmission rod 27 installed on the output shaft of the dual-shaft motor 26 via a coupling; a bevel gear 28 fixedly installed on one end of the transmission rod 27 and meshing with the screw 24; and a connecting seat 29 fixedly installed at the bottom of the lifting plate 25. A multi-port pipe 30 is fixedly installed on the lifting plate 25; a water guide pipe 31 is installed on the multi-port pipe 30 and connected to the connecting seat 29; a booster pump 32 is installed on the seawater tank 2; a seawater conduit 33 is set on the booster pump 32 and connected to the multi-port pipe 30; a filter element structure is installed on the support plate 16. The pre-treated seawater in the seawater tank 2 is pressurized by the booster pump 32, sent into the multi-port pipe 30 through the seawater conduit 33, and then distributed to each reverse osmosis filter element 34 through the water guide pipe 31. The dual-shaft motor 26 is connected to the multi-port pipe 30. The transmission rod 27 and bevel gear 28 drive the screws 24 on both sides to rotate synchronously, causing the lifting plate 25 to move the connecting seat 29 downward, pressing the inlet 35 of the reverse osmosis filter element 34. High-pressure seawater enters from the inlet 35 of the reverse osmosis filter element 34 and is separated into desalinated water and concentrated seawater under the action of the reverse osmosis membrane. The desalinated water flows out from the outlet 39 and flows into the desalinated water manifold 21 through the desalinated water conduit 22. The concentrated seawater flows out from the outlet 38 and flows into the concentrated water manifold 19 through the concentrated water conduit 18 and is discharged. The desalinated water is stored in the water storage tank 42.

[0024] The filter element structure includes: a reverse osmosis filter element 34 disposed on the top of the support plate 16; an inlet 35 installed on the reverse osmosis filter element 34; an upper sleeve plate 36 fixedly sleeved on the inlet 35; a second sealing ring 37 installed on the upper sleeve plate 36; a concentrated water outlet 38 and a desalinated water outlet 39 installed at the bottom of the reverse osmosis filter element 34; pretreated seawater in the seawater tank 2 is pressurized by a booster pump 32, sent through a seawater conduit 33 into a multi-port pipe 30, and then distributed to each reverse osmosis filter element 34 through a water guide pipe 31; and a dual-shaft motor. 26 drives the screws 24 on both sides to rotate synchronously through the transmission rod 27 and the bevel gear 28, causing the lifting plate 25 to move the connecting seat 29 downward, pressing the inlet 35 of the reverse osmosis filter element 34. High-pressure seawater enters from the inlet 35 of the reverse osmosis filter element 34 and is separated into desalinated water and concentrated seawater under the action of the reverse osmosis membrane. The seawater flows out from the desalinated water outlet 39 and flows into the desalinated water manifold 21 through the desalinated water conduit 22. The concentrated seawater flows out from the concentrated water outlet 38 and flows into the concentrated water manifold 19 through the concentrated water conduit 18 and is discharged. The desalinated water is stored in the water storage tank 42.

[0025] Both the concentrated water outlet 38 and the desalinated water outlet 39 are fixedly fitted with a lower sleeve plate 40. The bottom of the lower sleeve plate 40 is provided with a third sealing ring 41. The upper sleeve plate 36 and the second sealing ring 37, and the lower sleeve plate 40 and the third sealing ring 41 respectively achieve reliable sealing of the water inlet end and the water outlet end, preventing water leakage and cross-contamination.

[0026] A water storage tank 42 is fixedly installed on the top of the base plate 1. The water storage tank 42 is connected to the desalinated water manifold 21. A water intake pipe 43 is provided on the water storage tank 42, and a water intake valve 44 is provided on the water intake pipe 43.

[0027] The inner wall of the water storage tank 42 is equipped with a UV sterilization lamp tube 45, and a transparent waterproof lamp cover 46 is provided on the UV sterilization lamp tube 45. The UV sterilization lamp tube 45 and the transparent waterproof lamp cover 46 work together to continuously sterilize the fresh water with ultraviolet light, ensuring the safety of drinking water.

[0028] A salinity sensor 47 is installed on the bottom inner wall of the water storage tank 42, and a radar level sensor is installed on the top inner wall of the seawater tank 2. The salinity of the freshwater is monitored in real time by the salinity sensor 47 to ensure that the desalination meets the standards, and the seawater level in the seawater tank 2 can be monitored by the radar level sensor.

[0029] The bottom of the filter box 3 is equipped with a drain pipe, the bottom end of which extends into the interior of the seawater tank 2. The filtered seawater can be introduced into the seawater tank 2 through the drain pipe.

[0030] The working principle of the seawater desalination equipment for ocean-going fishing vessels provided by this invention is as follows: Submersible pump 5 draws external seawater into filter box 3 through water pipe 4. The seawater passes through sand filter element 7 and fine filter element 8 on sealing plate 6 for two-stage filtration to remove suspended solids, silt and large particles from the seawater. The filtered seawater enters seawater tank 2 for temporary storage through drain pipe at the bottom of filter box 3. Sealing plate 6 is fixed to filter box 3 by bolts 9. First sealing ring 10 ensures sealing. Handle 11 facilitates filter element disassembly and maintenance. The scale inhibitor storage tank 12 at the top of the seawater tank 2 stores scale inhibitor solution. The scale inhibitor is added quantitatively into the seawater tank 2 through the liquid addition pipe 13 and the liquid addition valve 14 to prevent subsequent reverse osmosis filter element 34 from scaling and clogging, and to extend its service life. The pretreated seawater in the seawater tank 2 is pressurized by the booster pump 32 and sent to the multi-port pipe 30 through the seawater conduit 33. Then, it is distributed to each reverse osmosis filter element 34 through the water guide pipe 31. The dual-shaft motor 26 drives the screws 24 on both sides to rotate synchronously through the transmission rod 27 and the bevel gear 28, so that the lifting plate 25 drives the connecting seat 29 to move downward, pressing the inlet 35 of the reverse osmosis filter element 34. The upper sleeve plate 36 and the second sealing ring 37, and the lower sleeve plate 40 and the third sealing ring 41 respectively achieve reliable sealing of the inlet and outlet ends to prevent water leakage and cross-contamination. The high-pressure seawater enters from the inlet 35 of the reverse osmosis filter element 34 and is separated into desalinated water and concentrated seawater under the action of the reverse osmosis membrane. The desalinated water flows out from the desalinated water outlet 39 and flows into the desalinated water manifold 21 through the desalinated water conduit 22. The concentrated seawater flows out from the concentrated water outlet 38 and flows into the concentrated water manifold 19 through the concentrated water conduit 18 and is discharged. Desalinated water is collected into storage tank 42 for storage. UV sterilization lamp tube 45 inside the tank, together with transparent waterproof lamp cover 46, continuously sterilizes the fresh water with ultraviolet light to ensure drinking water safety. Fresh water can be taken through water intake pipe 43 and water intake valve 44. The salinity sensor 47 in the water storage tank 42 monitors the salinity of the fresh water in real time to ensure that the desalination meets the standards. The radar level sensor in the seawater tank 2 monitors the seawater level.

[0031] Compared with related technologies, the seawater desalination equipment for ocean-going fishing vessels provided by this invention has the following beneficial effects: This invention provides a seawater desalination device for ocean-going fishing vessels. A seawater tank 2 stores seawater to be desalinated, and a filter box 3 houses the filtration mechanism. A submersible pump 5 draws external seawater into the filter box 3 via a pumping pipe 4. The filtration mechanism removes suspended solids, silt, and large particulate impurities from the seawater. The desalination mechanism enables efficient desalination and facilitates filter cartridge replacement. A sand filter 7 and a fine filter 8 perform two-stage filtration to remove suspended solids, silt, and large particulate impurities. The filtered seawater is then passed through a filter... The drain pipe at the bottom of tank 3 leads to seawater tank 2 for temporary storage. Sealing plate 6 is fixed to filter tank 3 by bolts 9. First sealing ring 10 ensures a tight seal. Handle 11 facilitates filter element disassembly and maintenance. Antiscalant is stored in antiscalant storage tank 12. Antiscalant is added quantitatively to seawater tank 2 via filling pipe 13 and filling valve 14 to prevent scaling and clogging of subsequent reverse osmosis filter elements 34, extending their service life. Pretreated seawater in seawater tank 2 is pressurized by booster pump 32, sent through seawater conduit 33 to multi-port pipe 30, and then distributed to each reverse osmosis filter element via water pipe 31. 34. The dual-shaft motor 26 drives the two screws 24 to rotate synchronously through the transmission rod 27 and the bevel gear 28, causing the lifting plate 25 to move the connecting seat 29 downward, pressing the inlet 35 of the reverse osmosis filter element 34. High-pressure seawater enters from the inlet 35 of the reverse osmosis filter element 34 and is separated into desalinated water and concentrated seawater under the action of the reverse osmosis membrane. The desalinated water flows out from the outlet 39 and merges into the desalinated water manifold 21 through the desalinated water conduit 22. The concentrated seawater flows out from the concentrated water outlet 38 and merges into the concentrated water manifold 19 through the concentrated water conduit 18 and is discharged. Water is collected in the water storage tank 42. The upper sleeve plate 36 and the second sealing ring 37, and the lower sleeve plate 40 and the third sealing ring 41 respectively achieve reliable sealing of the water inlet and outlet to prevent water leakage and cross-contamination. The UV sterilization lamp tube 45 inside the tank, together with the transparent waterproof lamp cover 46, continuously sterilizes the fresh water with ultraviolet light to ensure drinking water safety. The salinity of the fresh water is monitored in real time by the salinity sensor 47 to ensure that the desalination meets the standards. The seawater level in the seawater tank 2 can be monitored by the radar level sensor. The filtered seawater can be introduced into the seawater tank 2 through the drain pipe.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A seawater desalination device for ocean-going fishing vessels, characterized in that, include: Base plate; A seawater tank that is fixedly installed on the base plate; A filter box that is fixedly installed on top of the seawater tank; A water pumping pipe is installed on the filter box; A submersible pump installed at one end of the pumping pipe; A filtration mechanism installed on the filter box for filtering seawater; A seawater desalination mechanism installed on top of the base plate for desalinating seawater.

2. The apparatus according to claim 1, wherein The filtration mechanism includes: A sealing plate is installed on the filter box; Sand and gravel filter elements and fine filter elements installed on the sealing plate; Bolts are provided on the sealing plate and threadedly connected to the filter box; The first sealing ring and the handle are respectively installed on both sides of the sealing plate.

3. The seawater desalination equipment for ocean-going fishing vessels according to claim 1, characterized in that, A scale inhibitor storage tank is fixedly installed on the top of the seawater tank. A liquid filling pipe is provided on the scale inhibitor storage tank. One end of the liquid filling pipe extends into the interior of the seawater tank. A liquid filling valve is provided on the liquid filling pipe.

4. The seawater desalination equipment for ocean-going fishing vessels according to claim 1, characterized in that, The seawater desalination unit includes: A frame fixedly installed on top of the base plate; A support plate fixedly installed on the inner wall of the frame; A first insertion hole is provided on the support plate, and a concentrated water conduit is provided at the bottom of the first insertion hole. A concentrated water manifold is provided at the bottom end of the concentrated water conduit. A second insertion hole is provided on the support plate, and a desalinated water conduit is provided at the bottom of the second insertion hole. A desalinated water manifold is provided at one end of the desalinated water conduit. A connecting plate fixedly installed on the inner wall of the frame; A screw rod is rotatably mounted on the connecting plate and rotatably connected to the inner wall of the frame; A lifting plate threaded onto the screw; A dual-axis motor is fixedly installed on the inner wall of the top of the frame; A transmission rod is mounted on the output shaft of the dual-shaft motor via a coupling; A bevel gear that is fixedly installed and meshes with one end of the transmission rod and the screw; A connecting seat fixedly installed at the bottom of the lifting plate; A multi-port pipe fixedly installed on the lifting plate; A water guide pipe installed on the multi-port pipe and connected to the connecting seat; A booster pump installed on the seawater tank; A seawater conduit is installed on the booster pump and connected to the multi-port pipe; The filter element structure mounted on the support plate.

5. The apparatus according to claim 4, wherein The filter element structure includes: The reverse osmosis filter element is installed on the top of the support plate; The inlet installed on the reverse osmosis filter element; An upper sleeve plate fixedly fitted onto the water inlet; The second sealing ring is installed on the upper sleeve plate; The concentrated water outlet and the desalinated water outlet are installed at the bottom of the reverse osmosis filter element.

6. The apparatus according to claim 5, wherein Both the concentrated water outlet and the desalinated water outlet are fixedly fitted with a lower sleeve plate, and a third sealing ring is provided at the bottom of the lower sleeve plate.

7. The apparatus according to claim 4, wherein A water storage tank is fixedly installed on the top of the base plate. The water storage tank is connected to the desalinated water manifold. A water intake pipe is installed on the water storage tank, and a water intake valve is installed on the water intake pipe.

8. The apparatus according to claim 7, wherein The inner wall of the water storage tank is equipped with a UV germicidal lamp tube, and the UV germicidal lamp tube is equipped with a transparent waterproof lamp cover.

9. The apparatus according to claim 7, wherein A salinity sensor is installed on the bottom inner wall of the water storage tank, and a radar level sensor is installed on the top inner wall of the seawater tank.

10. The seawater desalination equipment for ocean-going fishing vessels according to claim 1, characterized in that, A drain pipe is provided at the bottom of the filter box, and the bottom end of the drain pipe extends into the interior of the seawater tank.

Images