Marine seawater desalination device

Abstract

The invention discloses a marine seawater desalination device, and relates to the technical field of seawater treatment devices.The marine seawater desalination device comprises a pretreatment tank, a seawater temporary storage bin, a distillation bin, a condenser and a fresh water collection bin, the pretreatment tank communicates with a water inlet pipe and a first water conveying pipe, and a water suction pump is arranged on the water inlet pipe and used for sucking seawater into the pretreatment bin; a water filtering device for filtering seawater is arranged in the pretreatment tank, the first water conveying pipe is communicated with a seawater temporary storage bin, the seawater temporary storage bin is communicated with the distillation bin through a second water conveying pipe, a water supply pump is arranged on the second water conveying pipe, and a heating module for heating seawater is arranged in the distillation bin; the top of the distillation bin is communicated with a steam pipeline, the steam pipeline is communicated with a condenser and is used for condensing steam, the condenser is communicated with a fresh water pipeline, and the fresh water pipeline is communicated with a fresh water collecting bin. The sea water desalination device realizes efficient sea water desalination, reduces the occupied area of equipment, and is more suitable for ships.

Description

Technical Field

[0001] The present application relates to the technical field of seawater treatment devices, and in particular to a marine seawater desalination device. Background Art

[0002] With the development of the marine economy, the demand for ships to sail long distances is increasing. How to effectively obtain sufficient fresh water has become a major challenge for ocean voyages. Traditional ways of obtaining fresh water mainly include carrying enough water or refueling at shore. These methods not only take up a lot of space, but also limit the sailing time.

[0003] At present, in order to achieve seawater desalination, the commonly used methods include reverse osmosis, electrodialysis and distillation. Among them, the distillation method is widely used in the market due to its simple operation and convenient maintenance. Specifically, the existing seawater distillation method mainly includes a pretreatment system, an evaporation system and a condensation system. The pretreatment system mainly removes larger impurities in seawater through filtration, precipitation and other methods; the evaporation system uses heating to heat the seawater to boiling to generate steam; the condensation system is responsible for condensing the generated steam into fresh water and collecting it.

[0004] However, existing distillation desalination devices have the problem of large floor space, which makes them difficult to adapt to the limited space conditions of ships, especially in ocean voyages, where space utilization is extremely important. Therefore, a desalination device that can effectively reduce the floor space and adapt to the ship space is needed to solve this problem. Summary of the invention

[0005] In view of the problems existing in the prior art, the present application provides a marine seawater desalination device.

[0006] The present application provides a marine seawater desalination device, which adopts the following technical solution: A marine seawater desalination device comprises a pretreatment tank, a seawater temporary storage bin, a distillation bin, a condenser and a fresh water collection bin, wherein the pretreatment tank is connected with a water inlet pipe and a first water delivery pipe, the water inlet pipe is provided with a water suction pump for sucking seawater into the pretreatment bin, the pretreatment tank is provided with a water filtering device for filtering the seawater, the first water delivery pipe is connected with the seawater temporary storage bin, the seawater temporary storage bin is connected with the distillation bin through a second water delivery pipe, and the second water delivery pipe is provided with a water supply pump, the distillation bin is provided with a heating module for heating the seawater, the top of the distillation bin is connected with a steam pipe, the steam pipe is connected with a condenser for condensing steam, the condenser is connected with a fresh water pipe, and the fresh water pipe is connected with the fresh water collection bin.

[0007] Optionally, the water filtering device includes a water filter cartridge fixedly disposed in a pretreatment tank, a water filter plate fixedly disposed in the water filter cartridge, and filter material filled in the water filter cartridge, a water inlet is provided on a side wall of the water filter cartridge, a plurality of water holes are provided on the water filter plate, the filter material is disposed between the water inlet and the water filter plate, the first water pipe extends into the water filter cartridge and is connected to the water filter cartridge, and the connecting end of the first water pipe and the water filter cartridge is located below the water filter plate.

[0008] Optionally, a filter screen is fixedly installed in the pretreatment tank, and the filter screen is arranged along the circumference of the water filter cartridge. The connecting end of the water inlet pipe and the pretreatment tank is located above the filter screen, and the water inlet is located below the filter screen.

[0009] Optionally, the condenser includes a shell and a condensation bin arranged in the shell, the steam pipe and the fresh water pipe are both connected to the condensation bin, a heat exchange chamber is arranged between the shell and the condensation bin, and the heat exchange chamber is connected to a water supply line for conveying cooling water into the heat exchange chamber.

[0010] Optionally, an inner liner is fixedly provided in the condensation bin, the inner liner is hollow, a plurality of connecting parts are fixedly provided on the side wall of the inner liner, each of the connecting parts is fixedly connected to the side wall of the condensation bin, a connecting port is provided inside the connecting part, and the connecting port is used to connect the heat exchange cavity and the inner liner.

[0011] Optionally, the water supply pipeline includes a first flow guide pipe and a second flow guide pipe, the first flow guide pipe is respectively connected to the first water delivery pipe and the heat exchange chamber, a three-way valve is provided at the connecting end of the first flow guide pipe and the first water delivery pipe, and a booster pump is provided on the first flow guide pipe, and the second flow guide pipe is respectively connected to the heat exchange chamber and the seawater temporary storage tank.

[0012] Optionally, a flushing rack is slidably arranged in the heat exchange chamber, a driving member for driving the flushing rack to slide is arranged on the shell, a plurality of nozzles are arranged on the flushing rack, the fresh water collection bin is connected to a recoil pipe, a high-pressure plunger pump is arranged on the recoil pipe, the recoil pipe extends into the heat exchange chamber and is connected to each of the nozzles, so as to flush the surface of the condensation bin.

[0013] Optionally, an annular scraper is fixedly provided on the rinsing rack. The annular scraper is sleeved on the condensation bin and abuts against the side wall of the condensation bin, so as to scrape off the salt stains on the side wall of the condensation bin.

[0014] Optionally, the second guide pipe extends to the bottom of the seawater temporary storage bin, and an overflow port is provided on the side wall of the seawater temporary storage bin near the top, and the overflow port is connected to an overflow pipe for discharging excess seawater back to the sea.

[0015] Optionally, an inner storage body is provided inside the seawater temporary storage bin, a heat preservation cavity is provided between the inner storage body and the outer storage body, and the heat preservation cavity is filled with heat preservation material.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. The marine seawater desalination device of the present application can effectively solve the problem of large space occupied by traditional distillation seawater desalination devices. Specifically, the pretreatment tank sucks in seawater through a water suction pump and preliminarily filters it through a water filtering device, ensuring the quality of seawater entering the subsequent system and improving the operating efficiency of the entire system. Subsequently, the seawater temporary storage bin delivers the filtered seawater to the distillation bin through a second water pipe, and the heating module heats the seawater to generate steam. The steam enters the condenser through the steam pipe, is condensed into fresh water, and is collected in the fresh water collection bin through a fresh water pipe. This process achieves efficient seawater desalination, reduces the footprint of the equipment, and makes it more suitable for ship use.

[0017] 2. The present application arranges a hollow inner tank in the condensation bin, and the inner tank is fixedly connected to the side wall of the condensation bin by multiple connecting parts, and a connecting port is provided inside the connecting part, so that cooling water can enter the inner tank, thereby improving the heat exchange efficiency between cooling water and steam, thereby improving the condensation efficiency, and at the same time enhancing the structural stability.

[0018] 3. The present application improves the utilization rate of seawater by connecting the first flow guide pipe with the first water delivery pipe, and using the seawater filtered by the pretreatment tank as cooling water for the condenser; and the seawater that has undergone heat exchange with the steam enters the seawater temporary storage bin through the second flow guide pipe for temporary storage, preheating the seawater in the seawater temporary storage bin, and increasing the initial temperature of the seawater when entering the distillation bin, thereby effectively reducing energy consumption and improving energy utilization.

[0019] 4. As the heat exchange chamber is filled with seawater for a long time and exchanges heat with the steam in the condensing chamber, the side wall of the condensing chamber is easily attached with salt stains. By setting a flushing rack in the heat exchange chamber and equipping it with a drive, the flushing rack can be moved regularly or on demand, and a high-pressure plunger pump can be used to provide high-pressure water flow to each nozzle, and then each nozzle can efficiently clean the salt stains on the surface of the condensing chamber to prevent the accumulation of salt stains from affecting the condensation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall process flow chart of the embodiment of the present application; Figure 2 It is a schematic diagram of the structure of the pretreatment tank used in the embodiment of the present application; Figure 3 It is a structural cross-sectional view used to express the condenser in the embodiment of the present application; Figure 4 It is a schematic diagram of the overall structure of the condenser used in the embodiment of the present application; Figure 5 yes Figure 4 A magnified view of part A; Figure 6 It is a schematic diagram of the structure of a seawater temporary storage bin used in an embodiment of the present application.

[0021] Description of the reference numerals: 1. pretreatment tank; 11. water inlet pipe; 12. first water delivery pipe; 121. three-way valve; 13. water suction pump; 14. water filter cartridge; 141. water inlet; 15. water filter plate; 16. filter material; 17. filter screen; 2. seawater temporary storage bin; 21. second water delivery pipe; 22. water supply pump; 23. inner bin body; 24. insulation material; 25. overflow port; 26. overflow pipe; 3. distillation bin; 31. heating module; 32. Steam pipe; 33. Drain pipe; 34. Valve; 4. Condenser; 41. Fresh water pipe; 42. Shell; 43. Condensation chamber; 44. Heat exchange chamber; 45. First guide tube; 46. Second guide tube; 47. Booster pump; 48. Inner tank; 481. Connecting part; 482. Connecting port; 49. Driving part; 5. Fresh water collecting chamber; 51. Backwash pipe; 52. High-pressure plunger pump; 6. Flushing rack; 61. Annular scraper; 62. Nozzle. DETAILED DESCRIPTION

[0022] The following will be combined with the attached Figure 1 -Attached Figure 6 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0023] The inventor of this application has found that with the development of the marine economy, the demand for long-distance voyages of ships is increasing, and how to effectively obtain sufficient fresh water has become a major challenge for ocean voyages. To this end, this application discloses a marine seawater desalination device, which mainly adopts the following scheme: The present application embodiment discloses a marine seawater desalination device. Figure 1, including a pretreatment tank 1, a seawater temporary storage bin 2, a distillation bin 3, a condenser 4 and a fresh water collection bin 5. The pretreatment tank 1 is connected with a water inlet pipe 11 and a first water delivery pipe 12, and a water suction pump 13 is provided on the water inlet pipe 11, which is used to suck seawater into the pretreatment tank 1. A water filter device is provided in the pretreatment tank 1 for preliminary filtering of the seawater. The first water delivery pipe 12 is connected with the seawater temporary storage bin 2, and the seawater temporary storage bin 2 is used to store pretreated seawater, waiting to enter the distillation bin 3 for heating and evaporation. The seawater temporary storage bin 2 is connected with the distillation bin 3 through a second water delivery pipe 21, and a water supply pump 22 is provided on the second water delivery pipe 21. A heating module 31 is provided in the distillation bin 3, which is used to heat the seawater to evaporate and generate steam. The top of the distillation bin 3 is connected with the condenser 4 through a steam pipe 32, and the condenser 4 then sends the condensed fresh water into the fresh water collection bin 5 through a fresh water pipe 41.

[0024] Reference Figure 1 and Figure 2 The pretreatment tank 1 is the first line of defense of the whole device, which is used to remove larger impurities in seawater. The water filtering device in the pretreatment tank 1 includes a water filter cartridge 14, a water filter plate 15 and a filter material 16. The water filter cartridge 14 is fixed in the pretreatment tank 1, and a water inlet 141 is provided on its side wall. The water filter plate 15 is fixed in the water filter cartridge 14, and a plurality of water holes are provided on the water filter plate 15. The filter material 16 is filled between the water inlet 141 and the water filter plate 15 to intercept tiny particles in seawater. The first water pipe 12 extends into the water filter cartridge 14 and is connected to the water filter cartridge 14. The connecting end is located below the water filter plate 15 to ensure that the seawater filtered by the filter material 16 and the water filter plate 15 can enter the first water pipe 12. The water filter cartridge 14 can be made of stainless steel, which has good corrosion resistance and durability. The water filter plate 15 can be made of polypropylene (PP) material, which has high filtration efficiency and low cost. The filter material 16 may be quartz sand, activated carbon or other suitable filter media to improve the filtering effect.

[0025] Reference Figure 1 and Figure 2 A filter screen 17 is also fixedly arranged in the pretreatment tank 1, and the filter screen 17 is arranged along the circumference of the water filter cartridge 14. The connecting end of the water inlet pipe 11 and the pretreatment tank 1 is located above the filter screen 17, and the water inlet 141 is located below the filter screen 17. The filter screen 17 can be made of a stainless steel wire mesh, which has a strong filtering ability and a long service life, can effectively block larger impurities in seawater, and avoid clogging of the water inlet 141 of the water filter cartridge 14.

[0026] Reference Figure 1The distillation tank 3 is a key part of seawater desalination, and is mainly used to heat and evaporate seawater. A heating module 31 is provided in the distillation tank 3, which can be in various forms such as an electric heating rod or a steam heater. The selection of the heating module 31 should take into account energy efficiency and reliability. For example, an electric heating rod is suitable for small devices, while a steam heater is suitable for large devices. The top of the distillation tank 3 is connected to the condenser 4 through a steam pipe 32, and the generated steam is transported to the condenser 4 for condensation. The distillation tank 3 can be made of stainless steel, which has good high temperature resistance and corrosion resistance, and the distillation tank 3 is connected to a drain pipe 33 near the bottom, and a valve 34 is provided on the drain pipe 33.

[0027] Reference Figure 1 and Figure 3 The condenser 4 is used to condense steam into fresh water. Specifically, the condenser 4 includes a shell 42 and a condensation chamber 43. The steam pipe 32 and the fresh water pipe 41 are both connected to the condensation chamber 43. A heat exchange chamber 44 is provided in the shell 42. The condensation chamber 43 can be made of stainless steel with good corrosion resistance and thermal conductivity. The heat exchange chamber 44 is connected to a water supply pipeline for conveying cooling water into the heat exchange chamber 44. The water supply pipeline includes a first guide pipe 45 and a second guide pipe 46. The first guide pipe 45 is respectively connected to the first water delivery pipe 12 and the heat exchange chamber 44, and a booster pump 47 is provided on the first guide pipe 45. A three-way valve 121 is provided at the connecting end of the first flow guide pipe 45 and the first water delivery pipe 12, and the second flow guide pipe 46 is respectively connected with the heat exchange chamber 44 and the seawater temporary storage bin 2; by connecting the first flow guide pipe 45 with the first water delivery pipe 12, the seawater filtered by the pretreatment tank 1 is used as cooling water for the condenser 4, thereby improving the utilization rate of the seawater; and the seawater that has undergone heat exchange with the steam enters the seawater temporary storage bin 2 through the second flow guide pipe 46 for temporary storage, preheating the seawater in the seawater temporary storage bin 2, and improving the initial temperature of the seawater when entering the distillation bin 3, thereby effectively reducing energy consumption and improving the utilization rate of energy.

[0028] Reference Figure 3 and Figure 4 An inner liner 48 is fixedly arranged in the condensation bin 43. The inner liner 48 is hollow, and a plurality of connecting parts 481 are fixedly arranged on its side wall. The connecting part 481 is fixedly connected to the side wall of the condensation bin 43. A connecting port 482 is arranged inside the connecting part 481 for connecting the heat exchange cavity 44 and the inner liner 48, so that cooling water can enter the inner liner 48, thereby improving the heat exchange efficiency between cooling water and steam, thereby improving the condensation efficiency, and at the same time enhancing the structural stability; the inner liner 48 can be made of copper alloy material, which has excellent thermal conductivity and can effectively accelerate the condensation of steam.

[0029] Reference Figure 4 and Figure 5A flushing rack 6 is slidably arranged in the heat exchange chamber 44 along the length direction of the condensation bin 43. A driving member 49 is arranged on the shell 42. The driving member 49 adopts an electric push rod or a pneumatic cylinder to drive the flushing rack 6 to slide in the heat exchange chamber 44. An annular scraper 61 is also fixedly arranged on the flushing rack 6. The annular scraper 61 is sleeved on the condensation bin 43 and abuts against the side wall of the condensation bin 43, and is used to scrape off the salt stains on the side wall of the condensation bin 43, so as to clean the salt stains on the surface of the condensation bin 43.

[0030] Reference Figure 1 and Figure 5 , a plurality of nozzles 62 are arranged on the flushing rack 6, each nozzle 62 is distributed along the circumference of the condensing bin 43, and each nozzle 62 is facing the surface of the condensing bin 43. The fresh water collecting bin 5 is connected with a backwash pipe 51, which extends into the heat exchange chamber 44 and is connected with each nozzle 62. A high-pressure plunger pump 52 is arranged on the backwash pipe 51, which is used to send the high-pressure fresh water in the fresh water collecting bin 5 into the heat exchange chamber 44, and flush the surface of the condensing bin 43 through the nozzle 62 to prevent the accumulation of salt from affecting the condensation effect. The nozzle 62 on the flushing rack 6 can be a stainless steel nozzle, which has high corrosion resistance and injection pressure, and can effectively clean the surface of the condensing bin 43.

[0031] Reference Figure 6 The seawater temporary storage warehouse 2 is provided with an inner warehouse body 23, and a heat preservation cavity is provided between the inner warehouse body 23 and the outer warehouse body. The heat preservation cavity is filled with heat preservation material 24. The inner warehouse body 23 can be made of stainless steel material, which has good corrosion resistance. The heat preservation material 24 in the heat preservation cavity can be made of high-efficiency heat preservation material 24 such as polyurethane foam or rock wool to maintain the temperature of the seawater in the seawater temporary storage warehouse 2 to reduce heat loss.

[0032] Reference Figure 6 The second guide pipe 46 extends to the bottom of the seawater temporary storage bin 2. An overflow port 25 is provided on the side wall of the seawater temporary storage bin 2 near the top. The overflow port 25 is connected to an overflow pipe 26 for discharging excess seawater back to the sea. By extending the second guide pipe 46 to the bottom of the seawater temporary storage bin 2, high-temperature seawater can be effectively introduced into the heat exchange chamber 44, while the supercooled seawater at the top is discharged back to the sea through the overflow port 25, thereby reducing energy waste and avoiding impact on marine life.

[0033] The implementation principle of a marine seawater desalination device in the embodiment of the present application is as follows: the pretreatment tank 1 sucks seawater through the water suction pump 13 and initially filters it through the water filtering device to ensure the quality of seawater entering the subsequent system and improve the operating efficiency of the entire system. Subsequently, the seawater temporary storage tank 2 sends the filtered seawater to the distillation tank 3 through the second water delivery pipe 21, and the seawater is heated by the heating module 31 to generate steam. The steam enters the condenser 4 through the steam pipe 32, is condensed into fresh water and collected in the fresh water collection tank 5 through the fresh water pipe 41. This process realizes efficient seawater desalination, reduces the footprint of the equipment, and makes it more suitable for ship use.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A marine seawater desalination device, characterized in that: The invention comprises a pretreatment tank (1), a seawater temporary storage bin (2), a distillation bin (3), a condenser (4) and a fresh water collection bin (5); the pretreatment tank (1) is connected to a water inlet pipe (11) and a first water delivery pipe (12); the water inlet pipe (11) is provided with a water suction pump (13) for sucking seawater into the pretreatment bin; the pretreatment tank (1) is provided with a water filtering device for filtering the seawater; the first water delivery pipe (12) is connected to the seawater temporary storage bin (2); the seawater temporary storage bin (2) is connected to the water inlet pipe (11); The distillation tank (3) is connected to the distillation tank (3) through a second water pipe (21), and a water supply pump (22) is arranged on the second water pipe (21). A heating module (31) for heating seawater is arranged in the distillation tank (3). The top of the distillation tank (3) is connected to a steam pipe (32), and the steam pipe (32) is connected to a condenser (4) for condensing steam. The condenser (4) is connected to a fresh water pipe (41), and the fresh water pipe (41) is connected to a fresh water collection tank (5).

2. A marine seawater desalination device according to claim 1, characterized in that: The water filtering device comprises a water filtering cartridge (14) fixedly arranged in a pretreatment tank (1), a water filtering plate (15) fixedly arranged in the water filtering cartridge (14), and filter material (16) filled in the water filtering cartridge (14); a water inlet (141) is provided on the side wall of the water filtering cartridge (14); a plurality of water holes are provided on the water filtering plate (15); the filter material (16) is arranged between the water inlet (141) and the water filtering plate (15); the first water delivery pipe (12) extends into the water filtering cartridge (14) and is in communication with the water filtering cartridge (14); and the communication end between the first water delivery pipe (12) and the water filtering cartridge (14) is located below the water filtering plate (15).

3. A marine seawater desalination device according to claim 2, characterized in that: A filter screen (17) is also fixedly arranged in the pretreatment tank (1), and the filter screen (17) is arranged along the circumference of the water filter cartridge (14). The connecting end of the water inlet pipe (11) and the pretreatment tank (1) is located above the filter screen (17), and the water inlet (141) is located below the filter screen (17).

4. A marine seawater desalination device according to claim 1, characterized in that: The condenser (4) comprises a shell (42) and a condensation chamber (43) arranged in the shell (42); the steam pipe (32) and the fresh water pipe (41) are both connected to the condensation chamber (43); a heat exchange chamber (44) is arranged between the shell (42) and the condensation chamber (43); the heat exchange chamber (44) is connected to a water supply line for conveying cooling water into the heat exchange chamber (44).

5. A marine seawater desalination device according to claim 4, characterized in that: An inner liner (48) is fixedly arranged in the condensation bin (43); the inner liner (48) is hollow; a plurality of connecting parts (481) are fixedly arranged on the side wall of the inner liner (48); each of the connecting parts (481) is fixedly connected to the side wall of the condensation bin (43); a connecting port (482) is arranged inside the connecting part (481); the connecting port (482) is used to connect the heat exchange chamber (44) and the inner liner (48).

6. A marine seawater desalination device according to claim 4, characterized in that: The water supply pipeline comprises a first flow guide pipe (45) and a second flow guide pipe (46); the first flow guide pipe (45) is respectively connected to the first water delivery pipe (12) and the heat exchange chamber (44); a three-way valve (121) is provided at the connecting end of the first flow guide pipe (45) and the first water delivery pipe (12); a booster pump (47) is provided on the first flow guide pipe (45); and the second flow guide pipe (46) is respectively connected to the heat exchange chamber (44) and the seawater temporary storage tank (2).

7. A marine seawater desalination device according to claim 6, characterized in that: A flushing rack (6) is slidably arranged in the heat exchange chamber (44), a driving member (49) for driving the flushing rack (6) to slide is arranged on the shell (42), a plurality of nozzles (62) are arranged on the flushing rack (6), the fresh water collection chamber (5) is connected to a recoil pipe (51), a high-pressure plunger pump (52) is arranged on the recoil pipe (51), the recoil pipe (51) extends into the heat exchange chamber (44) and is connected to each of the nozzles (62) for flushing the surface of the condensation chamber (43).

8. A marine seawater desalination device according to claim 7, characterized in that: An annular scraper (61) is also fixedly arranged on the washing rack (6). The annular scraper (61) is sleeved on the condensation bin (43) and abuts against the side wall of the condensation bin (43) to scrape off the salt stains on the side wall of the condensation bin (43).

9. A marine seawater desalination device according to claim 6, characterized in that: The second guide pipe (46) extends to the bottom of the seawater temporary storage bin (2). An overflow port (25) is provided on the side wall of the seawater temporary storage bin (2) near the top. The overflow port (25) is connected to an overflow pipe (26) for discharging excess seawater back to the sea.

10. A marine seawater desalination device according to claim 6, characterized in that: An inner storage body (23) is arranged inside the seawater temporary storage tank (2), a heat preservation cavity is arranged between the inner storage body (23) and the outer storage body, and the heat preservation cavity is filled with heat preservation material (24).

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