Fresh water preparation device of ocean vessel

Abstract

The invention relates to the technical field of ship fresh water preparation equipment, in particular to an ocean ship fresh water preparation device which comprises an air gathering mechanism, a water vapor adsorption and desorption module and a condensation module. A water vapor adsorption material in a water vapor adsorption and desorption module is used for intercepting water vapor flowing through the water vapor adsorption and desorption module, and when absorption reaches saturation, a heating unit in the water vapor adsorption and desorption module is used for desorbing the water vapor adsorption material adsorbed on the water vapor adsorption material. The windward side is adjusted in a self-adaptive mode through the air gathering mechanism, and therefore sea wind containing water vapor is gathered in a low-energy-consumption mode; the water collection and adsorption module is used for intercepting and capturing water vapor in the gathered sea wind, and meanwhile, heating equipment and vacuumizing equipment of the desorption and adsorption module assembled at the same position can be used for condensing and collecting water to the condensation module; wherein the heating equipment directly obtains hot water heated by solar energy or a solar photovoltaic power generation assembly, so that the sea water desalination equipment can be designed on the ship at lower cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship fresh water production equipment, in particular to a fresh water production device for ocean-going ships. BACKGROUND

[0002] With the rapid development of global shipping industry, the problems of low energy efficiency and high greenhouse gas emissions of ships are increasingly prominent. The International Maritime Organization (IMO) has introduced mandatory measures including technical energy efficiency (EEXI) and operational energy efficiency (CII) to promote the transformation of ships towards low carbon and high energy efficiency. However, traditional fresh water production methods such as reverse osmosis and evaporative seawater desalination have high energy consumption, high cost and complex maintenance, and the fresh water supply of ocean-going ships mainly relies on shore supply or these high energy consumption technologies. At the same time, the waste heat of the main engine of the ocean-going ship accounts for 30% to 50% of the total energy consumption, but this valuable waste heat resource is often neglected, resulting in energy waste. In recent years, the rotary dehumidification technology has attracted attention due to its use of low-grade energy sources such as solar energy and waste heat, but its application in ships is still in the early stages of research.

[0003] Therefore, it is urgent to design a ship fresh water production equipment that can realize the self-sufficiency of fresh water for ocean-going ships, and solve the problems of high energy consumption and high cost of traditional seawater desalination technology. SUMMARY

[0004] The purpose of the present application is to provide a fresh water production device for ocean-going ships, which solves the problems of high energy consumption and high cost of conventional seawater desalination technology for ocean-going ships.

[0005] To solve the above technical problems, the present application adopts the following technical solutions: The present application provides a fresh water production device for ocean-going ships, comprising: An air gathering mechanism comprising a tapered cylinder for gathering air at sea and a straight cylinder in communication with the tapered cylinder at the narrow end; A water vapor adsorption and desorption module comprising at least two groups of water collection adsorption cavities; the steam inlet port of the water collection adsorption cavity is connected to the exhaust port of the straight cylinder through a gas guide hose; a water vapor adsorption material layer and an evaporation heating element are arranged in the water collection adsorption cavity; the steam outlet port of the water collection adsorption cavity is connected to an exhaust pipe through a tee pipe, and the exhaust end of the exhaust pipe is connected to a vacuum pump; desorption electric control valves and exhaust electric control valves are arranged in the two gas outlet pipes of the tee pipe, respectively; A condensation module comprising a condensation shell, a plurality of condensation pipes vertically penetrating the interior of the condensation shell, and two water collection cavities arranged on the outer wall of the condensation shell and connected to the end of the condensation pipe, respectively; one of the water collection cavities is connected to below sea level through a liquid inlet pipe, and the other water collection cavity is connected to seawater through a liquid outlet pipe; a condensate circulating pump is arranged on the liquid inlet pipe.

[0006] Further in the embodiment, the air gathering mechanism further comprises a rotating mechanism and a lifting mechanism for adjusting the orientation of the conical cylinder.

[0007] Further in the embodiment, the rotating mechanism comprises a slewing bearing outer shell arranged on the ship, a slewing bearing inner shell arranged on the slewing bearing outer shell through balls and a sealing member, and a servo motor for driving the slewing bearing inner shell to rotate relative to the slewing bearing outer shell; a gear rack is arranged on the inner circumferential wall of the slewing bearing inner shell, and a driving gear is arranged on the power output shaft of the servo motor, the driving gear being in meshing transmission with the gear rack.

[0008] Further in the embodiment, the lifting mechanism comprises a support plate arranged on the top surface of the slewing bearing inner shell, an inclination adjusting seat arranged on the support plate through a hinged seat, and an extension cylinder for adjusting the inclination angle of the inclination adjusting seat relative to the support plate; a straight cylinder is arranged on the inclination adjusting seat, and the steam inlet end of the straight cylinder is fixedly connected with a conical cylinder; the extension cylinder is an electric extension cylinder, the lower end of the extension cylinder is hingedly arranged on the top surface of the support plate through a lower hinged seat, and the extension end of the extension cylinder is hingedly connected with an upper hinged lug at the bottom of the inclination adjusting seat through a pin shaft.

[0009] Further in the embodiment, the water vapor adsorption and desorption module comprises a first water collection adsorption cavity and a second water collection adsorption cavity arranged on the bracket; the air guide hose is connected with the first water collection adsorption cavity and the second water collection adsorption cavity through a three-way air supply pipe; a first steam inlet electric control valve and a second steam inlet electric control valve are arranged on two branch pipes of the three-way air supply pipe respectively.

[0010] Further in the embodiment, the outlet of the first water collection adsorption cavity is connected with a steam extraction pipe through a three-way pipe, and the outlet of the second water collection adsorption cavity is connected with a steam extraction pipe through a three-way pipe; a first desorption electric control valve for controlling the steam inlet of the steam extraction pipe and a first exhaust electric control valve for controlling the exhaust are arranged on two branch pipes of the three-way pipe respectively; the first desorption electric control valve and the first exhaust electric control valve are set to be interlocked controlled by a controller; a second desorption electric control valve for controlling the steam inlet of the steam extraction pipe and a second exhaust electric control valve for controlling the exhaust are arranged on two branch pipes of the three-way pipe respectively; the second desorption electric control valve and the second exhaust electric control valve are set to be interlocked controlled; the first desorption electric control valve and the second desorption electric control valve are set to be interlocked controlled.

[0011] Further in the embodiment, the material of the water vapor adsorption material layer is MOFs material; the evaporation heating element is an electric heating pipe or a water heating pipe; the electric heating pipe or the water heating pipe is arranged in a loop shape in the water collecting and adsorbing cavity.

[0012] Further in the embodiment, the water heating pipe of the evaporation heating element is communicated with the water outlet end and the water inlet end of the solar water storage tank through the working medium inlet pipe and the working medium outlet pipe respectively, and a circulating pump is arranged on the working medium inlet pipe or the working medium outlet pipe; wherein the solar water storage tank is heated by a solar water heater, and an electric heater and a temperature sensor are installed in the solar water storage tank, wherein the electric heater is provided with electric energy by a photovoltaic power generation assembly, and the photovoltaic power generation assembly is installed on the ship body.

[0013] Further in the embodiment, the condensing shell is a water vapor condensing channel arranged in an inclined manner, wherein the exhaust end of the vacuum pump is communicated with the lower end of the condensing shell through a steam delivery pipe and supplies steam upward, and a water collecting tank is arranged at the bottom of the condensing shell; the condensing pipe penetrating through the condensing shell is perpendicular to the water vapor flow direction, and the inner diameter of the condensing pipe decreases from top to bottom.

[0014] Further in the embodiment, the lower end of the liquid outlet pipe and the lower end of the liquid inlet pipe are respectively provided with a filter cover.

[0015] Compared with the prior art, the beneficial technical effects of the present application are: In the present application, the air gathering mechanism is used to adaptively adjust the windward surface, so as to gather the sea wind containing water vapor with low energy consumption; and the water vapor in the gathered sea wind is intercepted by the water collecting and adsorbing module, and at the same time, the heating equipment and the vacuum pumping equipment of the desorption module assembled at the same position can also be used to condense water in the condensing module; wherein the heating equipment directly obtains hot water heated by solar energy or a solar photovoltaic power generation assembly, so that the sea water desalination equipment on the ship is realized at a lower cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings Figure 1 It is a main structure schematic diagram of the fresh water preparation device of the present application ocean-going ship; Figure 2 It is a schematic diagram of the fresh water preparation device assembled on the ship body; Figure 3 It is an enlarged schematic diagram of the air gathering mechanism structure; Figure 4 It is a schematic diagram of the external structure of the air gathering mechanism; Figure 5 It is a structure schematic diagram of the water collecting and adsorbing module; Figure 6It is a schematic diagram of the water collection and adsorption module structure outside; Figure 7 It is a schematic diagram of the condensation module structure; Figure 8 It is a schematic diagram of the condensation module structure outside.

[0017] Mark explanation: 1, air gathering mechanism; 11, air hose; 12, rotary bearing shell; 13, rotary bearing inner shell; 14, support plate; 15, servo motor; 151, drive gear; 16, tilt adjustment seat; 161, hinged seat; 17, telescopic cylinder; 171, lower hinged seat; 172, upper hinged ear; 18, straight cylinder; 19, tapered cylinder; 2, three-way air supply pipe; 21, first steam inlet electric control valve; 22, second steam inlet electric control valve; 3, support; 4, first water collection and adsorption cavity; 41, second water collection and adsorption cavity; 42, MOFs material; 43, evaporation heating element; 44, working fluid inlet pipe; 45, solar water storage tank; 451, circulating pump; 452, electric heater; 46, working fluid discharge pipe; 47, photovoltaic power generation assembly; 5, three-way pipe a; 51, three-way pipe b; 6, first exhaust electric control valve; 61, second exhaust electric control valve; 7, steam extraction pipe; 71, first desorption electric control valve; 72, second desorption electric control valve; 8, vacuum pump; 81, steam supply pipe; 9, condensation shell; 91, condensation water pump; 911, water inlet pipe; 912, water outlet pipe; 92, condensation pipe; 93, condensate circulating pump; 94, liquid discharge pipe; 92, liquid inlet pipe; 1, water collection tank. DETAILED DESCRIPTION

[0018] Reference Figure 1 In the embodiment, a fresh water preparation device for ocean-going ships is disclosed, which comprises an air gathering mechanism 1, a water vapor adsorption and desorption module, and a condensation module. The air gathering mechanism 1 delivers air containing water vapor to the water vapor adsorption and desorption module, which uses water vapor adsorption material in the water vapor adsorption and desorption module to intercept the water vapor flowing through it. When the absorption reaches saturation, the heating unit in the water vapor adsorption and desorption module desorbs the adsorbed water vapor, and then a vacuum pump delivers the water vapor to the condensation module for condensation and water collection.

[0019] In the embodiment, the air gathering mechanism 1 comprises a tapered cylinder 19 for gathering sea air and a straight cylinder 18 in communication with the tapered cylinder 19. The air gathering mechanism 1 further comprises a rotary mechanism and a lifting mechanism for adjusting the orientation of the tapered cylinder 19. In actual implementation, a wind direction sensor is installed on the air gathering mechanism 1 or the ship body, and the orientation of the tapered cylinder 19 is adjusted to maximize the air intake amount and speed of the tapered cylinder 19.

[0020] Referring to FIG. 3, the slewing mechanism comprises a slewing bearing outer shell 12 mounted on the ship, a slewing bearing inner shell 13 mounted on the slewing bearing outer shell 12 through balls and a seal, and a servo motor 15 for driving the slewing bearing inner shell 13 to rotate relative to the slewing bearing outer shell 12; wherein a rack is designed on the inner circumferential wall of the slewing bearing inner shell 13, and a driving gear 151 is mounted on the power output shaft of the servo motor 15 and meshes with the rack for transmission; wherein the servo motor 15 adjusts the rotation range of the slewing bearing inner shell 13 through a controller, and specifically, the controller adjusts the action of the servo motor 15 according to a wind direction sensor and adjusts the orientation of the straight cylinder 18 and the conical cylinder 19 in the horizontal direction.

[0021] Referring to Figure 3 and Figure 4 , the lifting mechanism comprises a support plate 14 mounted on the top surface of the slewing bearing inner shell 13, an inclination adjusting seat 16 mounted on the support plate 14 through a hinged seat 161, and a telescopic cylinder 17 for adjusting the inclination angle of the inclination adjusting seat 16 relative to the support plate 14; a straight cylinder 18 is mounted on the inclination adjusting seat 16, and the gas inlet end of the straight cylinder 18 is fixedly connected to a conical cylinder 19; wherein the telescopic cylinder 17 is an electric telescopic cylinder, the lower end of the telescopic cylinder 17 is hingedly mounted on the top surface of the support plate 14 through a lower hinged seat 171, and the telescopic end of the telescopic cylinder 17 is hingedly connected to the upper hinged lug 172 at the bottom of the inclination adjusting seat 16 through a pin shaft. Specifically, the controller adjusts the action of the telescopic cylinder 17 according to a wind direction sensor and adjusts the orientation of the straight cylinder 18 and the conical cylinder 19 in the longitudinal direction to correspond to the disturbance of the ocean ship in the running.

[0022] In this embodiment, the water vapor adsorption and desorption module comprises at least two groups of water collecting and adsorbing cavities, and specifically, a plurality of groups can be designed according to the requirements of the ship body; wherein the gas inlet port of the water collecting and adsorbing cavity is connected to the gas outlet end of the straight cylinder 18 through a gas guide hose 11; a water vapor adsorption material layer and an evaporation heating element 43 are mounted in the water collecting and adsorbing cavity; the gas outlet port of the water collecting and adsorbing cavity is connected to a steam extraction pipe 7 through a tee pipe, and the steam outlet end of the steam extraction pipe 7 is connected to a vacuum pump 8 (specifically, a water ring vacuum pump such as SK-15 type); wherein a desorption electric control valve and an exhaust electric control valve are respectively mounted on the two gas outlet pipes of the tee pipe.

[0023] Specifically, referring to Figure 1 , Figure 5 and Figure 6The water vapor adsorption and desorption module comprises a first water collection adsorption cavity 4 and a second water collection adsorption cavity 41 installed on the support 3; wherein the air guide hose 11 is connected to the first water collection adsorption cavity 4 and the second water collection adsorption cavity 41 through the three-way air supply pipe 2, the air guide hose 11 can be a rubber tube or a corrugated pipe, which is used to avoid the interference of the conical cylinder 19 to the sealing connection of the water collection adsorption cavity when adjusting; the first steam inlet electric control valve 21 and the second steam inlet electric control valve 22 are respectively installed on the two branch pipes of the three-way air supply pipe 2; wherein the first steam inlet electric control valve 21 and the second steam inlet electric control valve 22 are respectively controlled to enter the first water collection adsorption cavity 4 or the second water collection adsorption cavity 41 at different time; wherein the first steam inlet electric control valve 21 and the second steam inlet electric control valve 22 can be designed as interlocking control.

[0024] In this embodiment, the outlet of the first water collection adsorption cavity 4 is connected to the steam extraction pipe 7 through the three-way pipe a5, and the outlet of the second water collection adsorption cavity 41 is connected to the steam extraction pipe 7 through the three-way pipe b51; wherein the first desorption electric control valve 71 for controlling the steam inlet of the steam extraction pipe 7 and the first exhaust electric control valve 6 for controlling the exhaust are respectively installed on the two branch pipes of the three-way pipe a5; the first desorption electric control valve 71 and the first exhaust electric control valve 6 are set as interlocking control by the controller; the second desorption electric control valve 72 for controlling the steam inlet of the steam extraction pipe 7 and the second exhaust electric control valve 61 for controlling the exhaust are respectively installed on the two branch pipes of the three-way pipe b51; wherein the second desorption electric control valve 72 and the second exhaust electric control valve 61 are set as interlocking control; wherein the first desorption electric control valve 71 and the second desorption electric control valve 72 are set as interlocking control.

[0025] In specific implementation, the first steam inlet electric control valve 21 and the first desorption electric control valve 71 are designed as interlocking control; the second steam inlet electric control valve 22 and the second desorption electric control valve 72 are designed as interlocking control.

[0026] In this embodiment, the material of the water vapor adsorption material layer is MOFs material; the evaporation heating element 43 is an electric heating pipe or a water heating pipe; the electric heating pipe or the water heating pipe is installed in the water collection adsorption cavity in a back ring shape.

[0027] Specifically, referring to Figure 5The water heating pipe of the evaporation heating element 43 is communicated with the water outlet end and the water inlet end of the solar water storage tank 45 through the working medium inlet pipe 44 and the working medium outlet pipe 46 respectively, and a circulating pump 451 is installed on the working medium inlet pipe 44 or the working medium outlet pipe 46; wherein the solar water storage tank 45 is heated by a solar water heater, and an electric heater 452 and a temperature sensor are installed in the solar water storage tank 45 to ensure that the water temperature in the solar water storage tank 45 is between 80-120℃, wherein the electric heater 452 is powered by a photovoltaic power generation assembly 47, and the photovoltaic power generation assembly 47 is installed on the ship body.

[0028] In use, the air gathering mechanism 1 sends air to the first water collection adsorption cavity 4 and the second water collection adsorption cavity 41 through the three-way air supply pipe 2, and the first water collection adsorption cavity 4 and the second water collection adsorption cavity 41 are switched for use, wherein high-precision humidity sensors are arranged at the air outlet ends of the first water collection adsorption cavity 4 and the second water collection adsorption cavity 41, and a threshold value (such as 30% RH) is set to trigger the switching.

[0029] For example, after detecting that the water vapor adsorption material in the second water collection adsorption cavity 41 reaches saturation, the first steam inlet electric control valve 21, the first exhaust electric control valve 6, and the second desorption electric control valve 72 are immediately closed, and the second steam inlet electric control valve 22, the second exhaust electric control valve 61, and the first desorption electric control valve 71 are opened; thereby the first water collection adsorption cavity 4 continues to adsorb steam, and the water vapor adsorption material in the second water collection adsorption cavity 41 is desorbed.

[0030] Reference Figure 7 And Figure 8 The condensation module includes a condensation shell 9, a plurality of condensation pipes 92 vertically penetrating the inside of the condensation shell 9, and two water collection cavities respectively installed on the outer wall of the condensation shell 9 and communicated with the end portions of the condensation pipes 92; one of the water collection cavities is communicated with the sea surface below through a liquid inlet pipe 92, and the other water collection cavity is communicated with seawater through a liquid outlet pipe 94; and a condensate circulating pump 93 is installed on the liquid inlet pipe 92; wherein the lowermost ends of the liquid inlet pipe 92 and the liquid outlet pipe 94 are below the sea surface, so that the condensate circulating pump 93 can meet the purpose of circulating and providing seawater for condensation only by using low power.

[0031] In this embodiment, the condensation shell 9 is a water vapor condensation passage arranged obliquely, wherein the exhaust end of the vacuum pump 8 is communicated with the lower end of the condensation shell 9 through a steam supply pipe 81 and supplies steam upward, and a water collection tank 10 is installed at the bottom of the condensation shell 9; the condensation pipes 92 penetrating the inside of the condensation shell 9 are perpendicular to the water vapor flow direction, and the inner diameters of the condensation pipes 92 decrease from top to bottom. The lower end of the liquid outlet pipe 95 and the lower end of the liquid inlet pipe 92 are respectively provided with filter covers to prevent blockage.

[0032] The above embodiments are only to describe the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement of the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A fresh water preparation device for an ocean-going vessel, characterized in that: include: An air gathering mechanism (1) comprises a conical cylinder (19) for gathering sea air, and a straight cylinder (18) connected to the conical cylinder (19) at a conical end; A water vapor adsorption and desorption module comprises at least two groups of water collection adsorption chambers; the steam inlet port of the water collection adsorption chamber is connected to the exhaust end of the straight cylinder (18) through an air guide hose (11); a water vapor adsorption material layer and an evaporation heating element (43) are provided in the water collection adsorption chamber; the steam exhaust port of the water collection adsorption chamber is connected to a steam extraction pipe (7) through a three-way pipe, and the steam exhaust end of the steam extraction pipe (7) is connected to a vacuum pump (8); wherein a desorption electric control valve and an exhaust electric control valve are respectively provided on the two outlet pipes of the three-way pipe; A condensation module comprises a condensation shell (9), a plurality of condensation tubes (92) vertically penetrating the interior of the condensation shell (9), and two water collecting chambers respectively arranged on the outer wall of the condensation shell (9) and connected to the ends of the condensation tubes (92); one of the water collecting chambers is connected to the sea surface through a liquid inlet pipe (92), and the other water collecting chamber is connected to seawater through a liquid discharge pipe (94); and a condensate circulation pump (93) is provided on the liquid inlet pipe (92).

2. The fresh water preparation device for an ocean-going vessel according to claim 1, characterized in that: The air converging mechanism (1) further comprises a rotating mechanism and a lifting mechanism for adjusting the orientation of the conical cylinder (19).

3. The fresh water preparation device for an ocean-going vessel according to claim 2, characterized in that: The slewing mechanism comprises a slewing bearing outer shell (12) arranged on the ship, a slewing bearing inner shell (13) arranged on the slewing bearing outer shell (12) via balls and a seal, and a servo motor (15) for driving the slewing bearing inner shell (13) to rotate relative to the slewing bearing outer shell (12); a ring rack is provided on the inner peripheral wall of the slewing bearing inner shell (13), a driving gear (151) is provided on the power output shaft of the servo motor (15), and the driving gear (151) is meshed with the ring rack for transmission.

4. The fresh water preparation device for an ocean-going vessel according to claim 3, characterized in that: The lifting mechanism comprises a support plate (14) arranged on the top surface of the slewing bearing inner shell (13), a tilt adjustment seat (16) arranged on the support plate (14) through a hinge seat (161), and a telescopic cylinder (17) for adjusting the tilt angle of the tilt adjustment seat (16) relative to the support plate (14); a straight cylinder (18) is arranged on the tilt adjustment seat (16), and the steam inlet end of the straight cylinder (18) is fixedly connected to a conical cylinder (19); wherein the telescopic cylinder (17) is an electric telescopic cylinder, and the lower end of the telescopic cylinder (17) is hingedly arranged on the top surface of the support plate (14) through a lower hinge seat (171), and the telescopic end of the telescopic cylinder (17) is hingedly connected to the upper hinge ear (172) at the bottom of the tilt adjustment seat (16) through a pin.

5. The fresh water preparation device for an ocean-going vessel according to claim 1, characterized in that: The water vapor adsorption and desorption module comprises a first water collection adsorption chamber (4) and a second water collection adsorption chamber (41) arranged on the bracket (3); the air guide hose (11) is connected to the first water collection adsorption chamber (4) and the second water collection adsorption chamber (41) respectively through a three-way air supply pipe (2); and a first steam inlet electric control valve (21) and a second steam inlet electric control valve (22) are respectively arranged on two branches of the three-way air supply pipe (2).

6. The fresh water preparation device for an ocean-going vessel according to claim 5, characterized in that: The outlet of the first water collection adsorption chamber (4) is connected to the steam extraction pipe (7) via a tee pipe a (5), and the outlet of the second water collection adsorption chamber (41) is connected to the steam extraction pipe (7) via a tee pipe b (51); A first desorption electric control valve (71) for controlling the steam inlet to the steam extraction pipe (7) and a first exhaust electric control valve (6) for controlling the exhaust are respectively provided on the two branch pipes of the three-way pipe a (5); the first desorption electric control valve (71) and the first exhaust electric control valve (6) are set to interlock control by a controller; A second desorption electric control valve (72) for controlling air intake into the steam extraction pipe (7) and a second exhaust electric control valve (61) for controlling exhaust are respectively provided on the two branch pipes of the three-way pipe b (51); wherein the second desorption electric control valve (72) and the second exhaust electric control valve (61) are set to be interlocked; The first desorption electrically controlled valve (71) and the second desorption electrically controlled valve (72) are set to be interlocked.

7. The fresh water preparation device for an ocean-going vessel according to claim 6, characterized in that: The material of the water vapor adsorption material layer is MOFs material; the evaporation heating element (43) is an electric heating tube or a water heating tube; the electric heating tube or the water heating tube is arranged in a circular manner in the water collection adsorption chamber.

8. The fresh water preparation device for an ocean-going vessel according to claim 7, characterized in that: The water heating pipe of the evaporation heating element (43) is connected to the water outlet and water inlet of the solar water storage tank (45) through the working fluid inlet pipe (44) and the working fluid discharge pipe (46), respectively, and a circulation pump (451) is provided on the working fluid inlet pipe (44) or the working fluid discharge pipe (46); wherein the solar water storage tank (45) stores heat through a solar water heater, and an electric heater (452) and a temperature sensor are installed in the solar water storage tank (45), wherein the electric heater (452) is provided with electric energy through a photovoltaic power generation component (47), and the photovoltaic power generation component (47) is installed on the hull.

9. The fresh water preparation device for an ocean-going vessel according to claim 1, characterized in that: The condensation shell (9) is a water vapor condensation channel arranged obliquely, wherein the exhaust end of the vacuum pump (8) is connected to the lower port of the condensation shell (9) through the steam supply pipe (81) and supplies steam upward, and a water collecting tank (10) is provided at the bottom of the condensation shell (9); the condensation pipe (92) running through the condensation shell (9) is perpendicular to the direction of water vapor flow, and the inner diameter of the condensation pipe (92) decreases from top to bottom.

10. The fresh water preparation device for an ocean-going vessel according to claim 1, characterized in that: The lower end of the liquid discharge pipe (95) and the lower end of the liquid inlet pipe (92) are respectively provided with filter covers.

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