Sea water desalination device based on marine new energy

Abstract

The invention relates to the technical field of sea water desalination, in particular to a sea water desalination device based on ocean new energy, which comprises a shell, a liquid cavity is formed in the shell, a filtering structure is arranged in the liquid cavity, six rotating blocks are arranged on the outer side wall of the shell at equal intervals in a whole row, a shaft rod is fixedly connected to the inner wall of each rotating block, and the shaft rod is fixedly connected to the outer side wall of the shell. The two ends of the shaft rod are provided with driving structures which can drive the filtering structure to move, and the side, away from the shell, of the rotating block is fixedly connected with a first flow plate. Rainwater and seawater can be collected and synthesized into low-salinity seawater to be purified in cloudy weather, the work efficiency is improved, the burden of a filtering structure is reduced, heat dissipation is conducted on the outer side wall of the shell through staggered sliding of a first flow plate and a second flow plate in the non-cloudy weather, and the service life of the shell is prolonged. The water vapor generated by the distillation structure is cooled and condensed, so that the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of seawater desalination technology, specifically to a seawater desalination device based on marine new energy sources. Background Technology

[0002] Seawater desalination plants typically extract seawater and send it into the desalination unit for purification. However, this process consumes a significant amount of energy. If a buoy structure is used, utilizing sunlight as an energy source and multiple purification devices are connected together for individual purification and centralized collection, a substantial amount of energy can be saved. The buoy structure requires excellent stability and resistance to wind and waves to ensure normal operation in the marine environment. Buoys usually employ anchored or drifting structures. For example, anchored buoys are fixed to the seabed by anchor chains, maintaining a relatively stable position. They absorb energy from the waves and convert it into mechanical force to desalinate the seawater.

[0003] However, during the seawater desalination process, rainwater is a natural source of desalinated water when it rains. By collecting rainwater and some seawater, low-salinity seawater can be obtained, which can greatly improve the desalination efficiency. At the same time, when seawater is distilled for desalination, it needs to be heated into steam and then condensed. If an electric device is used to drive this process, it will consume a lot of energy. Summary of the Invention

[0004] The purpose of this invention is to provide a seawater desalination device based on marine new energy sources to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a seawater desalination device based on marine new energy, comprising a shell, wherein a liquid cavity is provided inside the shell, and a filter structure is provided inside the liquid cavity; The outer side wall of the housing is provided with six rotating blocks arranged at equal intervals. Each rotating block has a shaft fixed to its inner wall. Both ends of the shaft are equipped with a drive structure that can drive the filter structure to move. A flow plate one is fixed to the side of the rotating block away from the shell, and a flow plate two is provided on the side of the flow plate one away from the rotating block. The lower ends of the flow plate one and the flow plate two are provided with a rotating structure. A flow channel 1 is provided on the side of the flow plate 1 near the flow plate 2, and a flow channel 2 is provided on the side of the flow plate 2 near the flow plate 1. The flow channel 1 and the flow channel 2 are adapted to each other. A piston plate is fixedly connected to the cavity of the flow channel 2, and the piston plate can slide in the cavity of the flow channel 1. A liquid outlet communicating with the flow channel 1 is provided on the upper surface of the rotating block, and a connection port adapted to the liquid outlet is provided on the inner side wall of the liquid cavity. Six wave energy converters are installed on the outer side wall at the lower end of the shell. Each wave energy converter has a float connected to it in a sliding manner on the side away from the shell. Each float is provided with a pushing structure between it and the flow plate at the corresponding position. The lower end of the shell is also equipped with a distillation structure.

[0006] Preferably, the filtration structure includes a storage frame, which is slidably connected to the cavity of the liquid chamber and connected to the drive structure. A filter plate is installed at the bottom of the inner cavity of the storage frame, and a reverse osmosis membrane is fixedly connected to the bottom of the inner cavity of the liquid chamber. A vapor chamber is opened inside the shell, and a drain chamber communicating with the vapor chamber is opened at the lower end of the reverse osmosis membrane.

[0007] Preferably, the drive structure includes gears symmetrically mounted on both sides of each shaft, with a rack slidably connected to the inside of the housing on one side of each gear, and each rack being fixedly connected to the storage frame.

[0008] Preferably, the rotating structure includes a sliding rod, which is slidably connected to the lower end of the flow plate two. A spring one is fixedly connected to the upper end of the sliding rod, and the other end of the spring one is fixedly connected to the flow plate two. A rotating shaft two is installed at the lower end of the sliding rod, and the other end of the rotating shaft two is fixedly connected to the flow plate one. A sliding plate is also slidably connected to the lower end of the flow plate two.

[0009] Preferably, two drain troughs are symmetrically opened on the inner side wall of the second flow channel. A stop block is slidably connected on the inner wall of the drain trough near the first flow plate, and the stop block can abut against the first flow plate. Springs are symmetrically installed at both ends of the stop block.

[0010] Preferably, the pushing structure includes an electric track, which is disposed on the upper surface of each float. A push rod is slidably connected inside the cavity of the electric track. A rotating shaft is fixedly connected to the upper end of the push rod, and each rotating shaft is fixedly connected to the side of the flow plate two away from the flow plate one at the corresponding position.

[0011] Preferably, the distillation structure includes a heating chamber, which is located inside the lower end of the shell and is not in communication with the liquid chamber. A heating column is installed at the bottom of the inner cavity of the heating chamber, and an exhaust port communicating with the steam chamber is provided on the inner side wall of the heating chamber.

[0012] Preferably, a small water pump is installed at the lower end of the housing, and a one-way valve is fixedly connected to the output end of the small water pump, and the one-way valve is connected to the heating chamber. An electric valve is installed at the bottom of the inner cavity of the heating chamber. A liquid collection shell connected to the steam chamber is fixedly connected to the lower end of the housing, and a fresh water output pipe is fixedly connected to the lower end of the liquid collection shell. A land connection bottom pipe is fixedly connected to the lower end of the fresh water output pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects: When it is rainy, the push structure causes Flow Plate 1 and Flow Plate 2 to unfold around the pivot. Then, rainwater and some seawater brought up by the waves are collected through Flow Channel 1 on Flow Plate 1 and Flow Channel 2 on Flow Plate 2, and discharged into the storage frame. This allows for the rapid collection of low-salinity seawater, reducing the filtration pressure on the filter plates and reverse osmosis membrane, and improving desalination efficiency. At the same time, the unfolding of Flow Plate 1 and Flow Plate 2, during the up-and-down movement of the float, also dissipates some of the force of the waves, thus pressurizing the reverse osmosis membrane. When it is not rainy, seawater desalination is carried out through the distillation structure. Then, the up-and-down movement of the float causes Flow Plate 2 and Flow Plate 1 to slide in a staggered manner, causing the space between Flow Channel 1 and Flow Channel 2 to be continuously ventilated, dissipating heat from the outer wall of the shell near the steam chamber. This causes the steam inside the steam chamber to condense into water, improving energy utilization. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the housing of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 6 This is a partial cross-sectional view of the shaft of the present invention; Figure 7 This is a schematic diagram of the unfolded structure of flow plate one and flow plate two of the present invention; Figure 8 This is a partial cross-sectional view of the rack structure of the present invention; Figure 9 This is a schematic diagram of the structure of the present invention after the shell is removed; Figure 10 For the present invention Figure 9 Enlarged view of point C in the middle; Figure 11 This is a cross-sectional view of the rotating block of the present invention; Figure 12 For the present invention Figure 11 Enlarged view of point D in the middle; Figure 13 For the present invention Figure 11 Enlarged view of point E in the middle.

[0015] Explanation of reference numerals in the attached figures: 1. Shell; 2. Liquid chamber; 3. Storage frame; 4. Filter plate; 5. Reverse osmosis membrane; 6. Shaft; 7. Rotating block; 8. Flow plate one; 81. Flow channel one; 9. Flow plate two; 91. Flow channel two; 10. Piston plate; 11. Float; 12. Electric track; 13. Push rod; 14. Rotating shaft one; 15. Rack; 16. Liquid outlet; 161. Connection port; 17. Drainage chamber; 18. Steam chamber; 19. Heating chamber; 20. Exhaust port; 21. Heating column; 22. Small water pump; 221. One-way valve; 23. Electric valve; 24. Wave energy converter; 25. Liquid collection shell; 26. Freshwater output pipe; 27. Land connection bottom pipe; 28. Spring one; 29. ​​Sliding rod; 30. Rotating shaft two; 31. Stop block; 311. Sewage trough; 32. Spring two; 33. Gear; 34. Slide plate. Detailed Implementation

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Please see Figures 1-13 The present invention provides a technical solution: a seawater desalination device based on marine new energy, including a shell 1, a liquid cavity 2 is provided inside the shell 1, and a filter structure is provided inside the liquid cavity 2; Six rotating blocks 7 are arranged equidistantly on the outer side wall of the housing 1. Each rotating block 7 has a shaft 6 fixed to its inner wall. The two ends of the shaft 6 are equipped with a drive structure that can drive the filter structure to move. A flow plate 8 is fixed to the side of the rotating block 7 away from the housing 1. A flow plate 9 is provided on the side of the flow plate 8 away from the rotating block 7. The lower ends of the flow plate 8 and the flow plate 9 are provided with a rotating structure. A flow channel 81 is provided on the side of the flow plate 8 near the flow plate 9, and a flow channel 91 is provided on the side of the flow plate 9 near the flow plate 8. The flow channel 81 and the flow channel 91 are compatible. A piston plate 10 is fixedly connected inside the cavity of the flow channel 91, and the piston plate 10 can slide inside the cavity of the flow channel 81. A liquid outlet 16 communicating with the flow channel 81 is provided on the upper surface of the rotating block 7. A connection port 161 compatible with the liquid outlet 16 is provided on the inner side wall of the liquid cavity 2. Six wave energy converters 24 are installed on the outer side wall at the lower end of the shell 1. Each wave energy converter 24 is slidably connected to a float 11 on the side away from the shell 1. Each float 11 is provided with a push structure between it and the corresponding flow plate 9. A distillation structure is also provided inside the lower end of the shell 1.

[0018] Specifically, when the semicircular rotating block 7 is not rotating around the shaft 6, the flow plate 8 will be in contact with the outer wall of the shell 1. When the distillation structure evaporates seawater, the outer wall of the shell 1 will heat up. The wave energy converter 24 can drive the flow plate 9 to slide up and down, causing the flow plate 9 to slide up and down on one side of the flow plate 8. Meanwhile, the piston plate 10 moves in the cavity of the flow channel 81, thereby continuously drawing air into the cavity formed by the flow channel 91 and the flow channel 81, and then discharging it. The flow plate 8 is made of a heat-conducting material, which cools the outer wall of the shell 1, allowing the water vapor generated by the distillation structure to condense into water quickly.

[0019] In this embodiment, the filtration structure includes a storage frame 3, which is slidably connected to the cavity of the liquid chamber 2 and connected to the drive structure. A filter plate 4 is installed at the bottom of the inner cavity of the storage frame 3, and a reverse osmosis membrane 5 is fixedly connected to the bottom of the inner cavity of the liquid chamber 2. A vapor chamber 18 is opened inside the shell 1, and a drain chamber 17 communicating with the vapor chamber 18 is opened at the lower end of the reverse osmosis membrane 5.

[0020] Specifically, when the semi-circular rotating block 7 rotates 90 degrees around the shaft 6, the liquid outlet 16 and the connection port 161 will align. At this time, the flow plate 8 is horizontal, and the flow channel 81 can store rainwater. Simultaneously, some seawater will flow into the flow channel 81 with the waves, eventually mixing to form low-salinity seawater. (Refer to...) Figure 10 The outlet 16 has a filter screen at the slot, which can initially filter the rainwater inside the flow channel 81. Then, it flows into the storage frame 3 through the connection port 161. The filter plate 4 is made of activated carbon material. Seawater contains oil, residual chlorine, and small molecule organic matter. The activated carbon will adsorb and filter these substances. Then, the filtered low-salinity seawater will flow into the upper surface of the filter plate 4 for the final filtration. Then, the filtered fresh water flows into the steam chamber 18 through the drain chamber 17.

[0021] In this embodiment, the drive structure includes gears 33, which are symmetrically mounted on both sides of each shaft 6. Each gear 33 has a rack 15 that is slidably connected inside the housing 1 on one side, and each rack 15 is fixedly connected to the storage frame 3.

[0022] Specifically, refer to Figure 11 and Figure 12When the semicircular rotating block 7 has not rotated 90 degrees clockwise around the shaft 6, the slot of the connection port 161 is located near the side wall of the storage frame 3. After the semicircular rotating block 7 rotates 90 degrees, the gear 33 drives the rack 15 to move downward, and the rack 15 then drives the storage frame 3 to move downward, so that the slot of the connection port 161 is located at the upper end of the storage frame 3. Then, every time the semicircular rotating block 7 resets a certain distance and rotates until the outlet 16 matches the connection port 161, the storage frame 3 and the filter plate 4 will move up and down continuously. At the same time, during this process, the outlet 16 is still at the upper end of the storage frame 3. During the up and down movement of the filter plate 4, due to the poor air permeability of the filter plate 4 and the presence of low-salinity seawater at the upper end of the filter plate 4, the regional pressure at the lower end of the filter plate 4 will increase, thereby allowing the reverse osmosis membrane 5 to desalinate and filter the seawater.

[0023] In this embodiment, the rotating structure includes a sliding rod 29, which is slidably connected to the lower end of the flow plate 2 9. A spring 28 is fixedly connected to the upper end of the sliding rod 29, and the other end of the spring 28 is fixedly connected to the flow plate 2 9. A rotating shaft 30 is installed at the lower end of the sliding rod 29, and the other end of the rotating shaft 30 is fixedly connected to the flow plate 8. A sliding plate 34 is also slidably connected to the lower end of the flow plate 2 9.

[0024] In this embodiment, two drain troughs 311 are symmetrically opened on the inner side wall of the second flow channel 91. A stop block 31 is slidably connected on the inner wall of the drain trough 31 near the first flow plate 8, and the stop block 31 can abut against the first flow plate 8. Springs 32 are symmetrically installed at both ends of the stop block 31.

[0025] In this embodiment, the pushing structure includes an electric track 12, which is disposed on the upper surface of each float 11. A push rod 13 is slidably connected inside the cavity of the electric track 12. A rotating shaft 14 is fixedly connected to the upper end of the push rod 13, and each rotating shaft 14 is fixedly connected to the side of the flow plate 9 away from the flow plate 8 at the corresponding position.

[0026] Specifically, when the waves cause the float 11 to move up and down, the push rod 13 will also move up and down along with it. During the up-and-down movement of the push rod 13, it will push the flow plate 9 to move up and down through the rotating shaft 14. The up-and-down movement of the flow plate 9 will cause the internal sliding rod 29 to slide continuously. At the same time, the spring 28 will be compressed and reset. During the movement of the piston plate 10, it will collide with the bottom of the inner cavity of the flow channel 81, thereby knocking the impurities filtered by the filter screen on the outlet 16 onto the upper surface of the piston plate 10. Then, when it rains, the electric track 12 will push the push rod 13 to move away from the shell 1. At the same time, the rotating shaft 30 between the flow plate 8 and the flow plate 9 will start to rotate, and finally... Figure 7The state shown places the flow channel 81 horizontally and the flow plate 9 tilted. Rainwater and waves will then fall into the interiors of flow channels 81 and 91. When the float 11 is pushed upwards by the waves, it causes the flow plate 9 to move accordingly. Simultaneously, the sliding rod 29 slides against the flow plate 9, while the flow plate 8 remains unchanged. When the float 11 moves downwards, it causes the flow plate 8 to rotate a certain distance, thus causing the semi-circular rotating block 7 to rotate the shaft 6, thereby driving the drive mechanism. The structure is designed so that, in rainy weather when the waves are large, the force generated by the large waves can be dissipated by the movement of the sliding rod 29 and the semi-circular rotating block 7. At the same time, when the flow plate 2 9 and the flow plate 1 8 are not in contact, the spring 2 32 will drive the stop block 31 to move, so that the stop block 31 will no longer block the drain trough 311. At this time, the rainwater flowing into the surface of the piston plate 10 will clean the surface of the piston plate 10. The surface of the piston plate 10 has impurities filtered on the liquid outlet 16. Then the cleaned impurities will be discharged from the drain trough 311.

[0027] In this embodiment, the distillation structure includes a heating chamber 19, which is located inside the lower end of the housing 1 and is not connected to the liquid chamber 2. A heating column 21 is installed at the bottom of the inner cavity of the heating chamber 19, and an exhaust port 20 connected to the steam chamber 18 is provided on the inner side wall of the heating chamber 19.

[0028] In this embodiment, a small water pump 22 is installed at the lower end of the housing 1. A one-way valve 221 is fixedly connected to the output end of the small water pump 22, and the one-way valve 221 is connected to the heating chamber 19. An electric valve 23 is installed at the bottom of the inner cavity of the heating chamber 19. A liquid collection shell 25 connected to the steam chamber 18 is fixedly connected to the lower end of the housing 1. A fresh water output pipe 26 is fixedly connected to the lower end of the liquid collection shell 25. A land connection bottom pipe 27 is fixedly connected to the lower end of the fresh water output pipe 26.

[0029] Specifically, seawater is pumped into the heating chamber 19 by a small water pump 22, and then heated and distilled by a heating column 21. The steam flows into the steam chamber 18 through the exhaust port 20. The outer wall of the shell 1 near the steam chamber 18 is cooled by the sliding motion of the first flow plate 8 and the second flow plate 9, causing the steam to condense into water droplets. The water droplets then flow into the bottom of the inner cavity of the steam chamber 18 and finally into the liquid collection shell 25. Then, the water is discharged into the land connecting bottom pipe 27 through the freshwater output pipe 26. The freshwater output pipe 26 is a one-way suction pipe, which can only discharge desalinated seawater into the land connecting bottom pipe 27. After most of the seawater is distilled inside the heating chamber 19, the high-salinity seawater is discharged through the electric valve 23. Then, the small water pump 22 and the one-way valve 221 draw seawater into the heating chamber 19 again.

[0030] Working principle: During rainy weather, the push structure causes the flow plate 8 and flow plate 9 to unfold around the rotating shaft 30. Then, rainwater and some seawater brought up by the waves are collected through the flow channel 81 on flow plate 8 and the flow channel 91 on flow plate 9, and then discharged into the storage frame 3. This allows for the rapid collection of low-salinity seawater, reducing the filtration pressure on the filter plate 4 and the reverse osmosis membrane 5, and improving the desalination efficiency. At the same time, the unfolding of flow plate 8 and flow plate 9, during the up-and-down movement of the float 11, can also dissipate some of the force of the waves, thereby pressurizing the filtration of the reverse osmosis membrane 5. Then, when there is no rainy weather, seawater desalination is carried out through the distillation structure. Then, the up-and-down movement of the float 11 causes flow plate 9 and flow plate 8 to slide in a staggered manner, so that the space formed between the flow channel 81 and flow channel 91 is constantly ventilated, which dissipates heat from the outer wall of the shell 1 near the steam chamber 18, causing the steam inside the steam chamber 18 to condense into water, thus improving the energy utilization rate.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A seawater desalination device based on marine new energy sources, comprising a shell (1), wherein a liquid cavity (2) is provided inside the shell (1), characterized in that: The liquid chamber (2) is equipped with a filter structure inside; The outer side wall of the housing (1) is provided with six rotating blocks (7) arranged at equal intervals. Each rotating block (7) has a shaft (6) fixed to its inner wall. Both ends of the shaft (6) are equipped with a driving structure that can drive the filter structure to move. A flow plate one (8) is fixed to the side of the rotating block (7) away from the shell (1), and a flow plate two (9) is provided on the side of the flow plate one (8) away from the rotating block (7). The lower ends of the flow plate one (8) and the flow plate two (9) are provided with a rotating structure. The flow plate one (8) has a flow groove one (81) on the side near the flow plate two (9), and the flow plate two (9) has a flow groove two (91) on the side near the flow plate one (8). The flow groove one (81) and the flow groove two (91) are compatible. A piston plate (10) is fixedly connected in the cavity of the flow groove two (91), and the piston plate (10) can slide in the cavity of the flow groove one (81). The upper surface of the rotating block (7) has a liquid outlet (16) communicating with the flow groove one (81), and the inner wall of the liquid cavity (2) has a connection port (161) compatible with the liquid outlet (16). Six wave energy converters (24) are installed on the outer side wall at the lower end of the shell (1). Each wave energy converter (24) has a float (11) slidably connected to the side away from the shell (1). Each float (11) is provided with a push structure between it and the corresponding flow plate (9). A distillation structure is also provided inside the lower end of the shell (1).

2. The seawater desalination device based on marine new energy sources according to claim 1, characterized in that: The filtration structure includes a storage frame (3), which is slidably connected to the cavity of the liquid chamber (2) and connected to the drive structure. A filter plate (4) is installed at the bottom of the inner cavity of the storage frame (3), and a reverse osmosis membrane (5) is fixedly connected to the bottom of the inner cavity of the liquid chamber (2). A steam chamber (18) is opened inside the shell (1), and a drain chamber (17) communicating with the steam chamber (18) is opened at the lower end of the reverse osmosis membrane (5).

3. A seawater desalination device based on marine new energy sources according to claim 1, characterized in that: The drive structure includes gears (33), which are symmetrically mounted on both sides of each shaft (6). Each gear (33) has a rack (15) that is slidably connected inside the housing (1) on one side, and each rack (15) is fixedly connected to the storage frame (3).

4. A seawater desalination device based on marine new energy sources according to claim 1, characterized in that: The rotating structure includes a sliding rod (29), which is slidably connected to the lower end of the flow plate two (9). A spring one (28) is fixedly connected to the upper end of the sliding rod (29), and the other end of the spring one (28) is fixedly connected to the flow plate two (9). A rotating shaft two (30) is installed at the lower end of the sliding rod (29), and the other end of the rotating shaft two (30) is fixedly connected to the flow plate one (8). A sliding plate (34) is also slidably connected to the lower end of the flow plate two (9).

5. A seawater desalination device based on marine new energy sources according to claim 1, characterized in that: Two drain troughs (311) are symmetrically opened on the inner wall of the second flow channel (91). A stop block (31) is slidably connected on the inner wall of the drain trough (311) near the first flow plate (8), and the stop block (31) can abut against the first flow plate (8). Springs (32) are symmetrically installed at both ends of the stop block (31).

6. A seawater desalination device based on marine new energy sources according to claim 1, characterized in that: The propulsion structure includes an electric track (12), which is disposed on the upper surface of each float (11). A push rod (13) is slidably connected inside the cavity of the electric track (12). A rotating shaft (14) is fixedly connected to the upper end of the push rod (13), and each rotating shaft (14) is fixedly connected to the side of the flow plate (9) away from the flow plate (8) at the corresponding position.

7. A seawater desalination device based on marine new energy sources according to claim 1, characterized in that: The distillation structure includes a heating chamber (19), which is located inside the lower end of the shell (1) and is not connected to the liquid chamber (2). A heating column (21) is installed at the bottom of the inner cavity of the heating chamber (19), and an exhaust port (20) connected to the steam chamber (18) is provided on the inner side wall of the heating chamber (19).

8. A seawater desalination device based on marine new energy sources according to claim 1, characterized in that: A small water pump (22) is installed at the lower end of the housing (1). A one-way valve (221) is fixedly connected to the output end of the small water pump (22), and the one-way valve (221) is connected to the heating chamber (19). An electric valve (23) is installed at the bottom of the inner cavity of the heating chamber (19). A liquid collection shell (25) connected to the steam chamber (18) is fixedly connected to the lower end of the housing (1). A fresh water output pipe (26) is fixedly connected to the lower end of the liquid collection shell (25). A land connection bottom pipe (27) is fixedly connected to the lower end of the fresh water output pipe (26).

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