A seawater purification device for aquaculture

Abstract

The present application relates to the technical field of seawater treatment, and particularly relates to a seawater purification device for aquaculture. In view of the problem that the seawater treatment efficiency is affected by the shutdown for cleaning after the reverse osmosis membrane is blocked, the seawater purification device comprises a support, a plurality of housings are uniformly distributed on the support, a filtering unit is installed on the housing, a liquid inlet unit and a liquid outlet unit are installed on the support, the housing is in communication with the liquid inlet unit and the liquid outlet unit, an electromagnetic valve is installed on the communication part of the liquid inlet unit and the housing, a sliding frame is slidably arranged on the housing, and a plurality of groups of fixing rings are fixedly connected to the sliding frame. The opening and closing of the electromagnetic valve are controlled, the reverse cleaning of the device is carried out without shutdown, the continuous treatment time of the device on seawater is prolonged, the reciprocating movement of the fixing rings is utilized to improve the scouring intensity of seawater on the surface of the corresponding filtering unit, and the adhesion amount of impurities on the surface of the filtering unit is reduced.

Description

Technical Field

[0001] This invention relates to the field of seawater treatment technology, and in particular to a seawater purification device for aquaculture. Background Technology

[0002] In the process of planning aquaculture areas along the coast to raise aquatic organisms such as fish, shellfish, and shrimp, seawater is often used as the aquaculture water source after undergoing multiple purification treatments. Seawater purification processes include physical filtration, chemical treatment, biological filtration, membrane technology, and microbial treatment. Currently, microfiltration and reverse osmosis are commonly used to purify seawater. However, during the filtration of salt and other impurities in seawater using traditional reverse osmosis membranes, the impurities in the seawater adhere directly to the reverse osmosis membrane under the pressure of the reverse osmosis process, affecting the filtration efficiency of the reverse osmosis membrane. Frequent cleaning of the reverse osmosis membrane is required. Currently, the cleaning of impurities attached to the reverse osmosis membrane often uses chemical methods or backwashing methods. Both of these methods require the reverse osmosis unit to be shut down for cleaning, which affects the working efficiency of reverse osmosis. Summary of the Invention

[0003] To overcome the problem that impurities in reverse osmosis devices easily adhere directly to the reverse osmosis membrane under pressure during seawater treatment, and that clogging requires shutdown for cleaning, this invention provides a seawater purification device for aquaculture.

[0004] The technical solution is as follows: A seawater purification device for aquaculture includes a support frame on which multiple shells are evenly distributed. Each shell contains a filter unit. The support frame also includes a liquid inlet unit and a liquid outlet unit. Both sides of the shells are fixedly connected to and communicate with the liquid inlet unit and the liquid outlet unit, respectively. A drain pipe is fixedly connected to and communicates with the side of the shell away from the liquid inlet unit, and the drain pipe communicates with the interior of the adjacent filter unit. Solenoid valves are installed at the communication points between the liquid inlet unit and the multiple shells. The solenoid valves are used to control the liquid flow path. A sliding frame is slidably mounted on the shell. Multiple sets of fixing rings are evenly distributed on the sliding frame, and each set of fixing rings includes two symmetrical rings.

[0005] More preferably, the distance between the retaining ring and the housing is greater than the distance between the retaining ring and the filter unit, which is used to impede the flow of the fluid medium and guide the fluid medium to flow along a specified path.

[0006] More preferably, the cross-section of the fixing ring is an isosceles trapezoid, and the width of the inner side of the fixing ring is greater than the width of its outer side.

[0007] More preferably, the distance between two adjacent sets of fixing rings is greater than the distance between two adjacent fixing rings within the same set.

[0008] More preferably, a servo motor is fixedly connected to the side of the housing near the drain pipe via a connecting bracket. The output shaft of the servo motor is equipped with a lead screw, which is threaded into the adjacent sliding frame. The servo motor is used to control the reciprocating range of the sliding frame.

[0009] More preferably, it further includes a plurality of evenly distributed sliding shells, which are slidably disposed in adjacent shells. Each sliding shell is provided with a liquid guiding cavity. Each sliding shell is fixedly connected to a liquid guiding pipe communicating with its liquid guiding cavity. The liquid guiding cavity of the sliding shell is connected and cooperates with the liquid inlet unit. The liquid guiding pipe is fixedly connected to a plurality of evenly distributed fixing sleeves. The plurality of fixing sleeves and a plurality of sets of fixing rings are staggered in the same shell.

[0010] More preferably, an electric push rod is fixedly connected to the side of the housing away from the drain pipe via a connecting frame. The telescopic end of the electric push rod penetrates the adjacent housing and is slidably connected to it. The telescopic end of the electric push rod is fixedly connected to the adjacent sliding housing. The electric push rod is used to control the area of ​​the liquid guiding cavity on the adjacent sliding housing that blocks the connection between the adjacent housing and the liquid inlet unit.

[0011] More preferably, both sides of the inner side of the fixing sleeve are provided as frustum surfaces to guide the corresponding fixing rings into them.

[0012] More preferably, the diameter of the connection between the liquid guide tube and the fixed sleeve is h1, the maximum distance between the two fixed rings in the same group is h2, and the width of the inner side of the fixed sleeve is h3, h3>h2>h1, which is used to coordinate the fixed sleeve to move different distances and the corresponding fixed rings to move different distances, so that the fluid medium can flow in different modes.

[0013] More preferably, the distance between the multiple sets of fixing rings and the adjacent filter units gradually decreases in the direction from the drain pipe to the electric push rod, and the distance between the multiple sets of fixing rings and the adjacent housings is equal.

[0014] The beneficial effects are: This invention utilizes the opening and closing of a uniformly distributed solenoid valve to control the backwashing and cleaning of the corresponding filter unit without stopping the device, thereby extending the continuous treatment time of the device for seawater. By using the reciprocating movement of the fixed ring, the flow rate of seawater on the surface of the corresponding filter unit is accelerated, thereby increasing the scouring force of seawater on the surface of the corresponding filter unit and reducing the amount of impurities adhering to the surface of the filter unit, thus indirectly extending the continuous filtration time of the filter unit.

[0015] By utilizing the movement of the fixed sleeve and the cooperation of two adjacent fixed rings, seawater can be controlled to penetrate the corresponding filter unit evenly, thereby improving the utilization rate of the filter unit and extending the amount of clean water discharged from the drain pipe.

[0016] By controlling the reciprocating frequency and amplitude of the fixed ring and coordinating with the fixed sleeve after movement, the intervals of the rapid reciprocating flow of seawater through the filter unit and the fixed ring are controlled, thereby enhancing the scouring of the outside of the corresponding filter unit by the seawater and thus strengthening the removal of impurities from the filter unit. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the housing of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the servo motor and lead screw of the present invention;

[0020] Figure 4 This is a cross-sectional view of the filter unit and the fixing ring of the present invention;

[0021] Figure 5 This is a cross-sectional view of the liquid guide tube and the fixing sleeve of the present invention;

[0022] Figure 6 This is a three-dimensional structural diagram of the sliding shell and liquid tube of the present invention.

[0023] The components are: 1. Support, 11. Housing, 111. Filter unit, 12. Liquid inlet unit, 13. Liquid outlet unit, 14. Liquid outlet pipe, 15. Solenoid valve, 16. Sliding frame, 17. Fixing ring, 18. Servo motor, 19. Lead screw, 20. Sliding shell, 21. Liquid guide pipe, 22. Fixing sleeve, 23. Electric push rod. Detailed Implementation

[0024] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure throughout this specification can be semantically applied to the same components having the same reference numerals or the same component names. Location descriptions selected in the specification, such as upper, lower, and lateral, are all indicated by reference numerals. Figure 1 The direction shown is used as an example for description.

[0025] In the process of purifying seawater using traditional reverse osmosis devices, impurities in the seawater are easily adhered to the reverse osmosis membrane under the pressure of the reverse osmosis device, causing the reverse osmosis membrane to become clogged quickly. This affects the continuous filtration time of the reverse osmosis membrane, resulting in frequent shutdowns for cleaning to ensure the purification of seawater and affecting the seawater treatment efficiency.

[0026] Example 1: A seawater purification device for aquaculture, referring to... Figures 1-4 As shown, the system includes a support frame 1, on which a control panel is mounted. Two evenly distributed housings 11 are mounted on the upper part of the support frame 1 (the number of housings 11 varies depending on the required amount of filtered water; only two are shown in the figure). Each housing 11 consists of a central cylindrical shell and caps at both ends. Each housing 11 contains a filter unit 111. The caps at both ends of the housing 11 facilitate the maintenance and replacement of the filter units 111. The filter units 111 are reverse osmosis membranes (different types of filter membranes can be selected depending on the impurities in the water; this article only describes the reverse osmosis treatment of seawater). An inlet unit 12 and a drain unit 1 are mounted at the front of the support frame 1. 3. The inlet unit 12 is located to the right of the outlet unit 13. The inlet unit 12 consists of pipes, valve bodies, and pump bodies, while the outlet unit 13 consists of pipes and valve bodies. The pump body and valve body of the inlet unit 12, and the valve body of the outlet unit 13, are all electrically connected to the control panel. The inlet unit 12 has two drain ports connected to the right sides of the two housings 11, and the outlet unit 13 has two inlets connected to the left sides of the two housings 11. The cover on the left side of the housing 11 is fixedly connected to and connected to the outlet pipe 14, which is connected to the interior of the adjacent filter unit 111. A flow sensor electrically connected to the control panel is installed inside the outlet pipe 14. Solenoid valves are installed at both drain ports of the inlet unit 12. 15. Solenoid valve 15 is used to control the liquid flow path. By controlling the opening and closing of solenoid valve 15, the flow path of seawater is controlled, which facilitates the backwashing and cleaning of the filter unit 111 inside the individual housing 11, ensuring that the device continuously treats and purifies seawater, thus ensuring the supply of water required for aquaculture. The housing 11 is slidably equipped with a sliding frame 16. The portion of the sliding frame 16 located inside the housing 11 is fixed with eight evenly distributed sets of fixing rings 17 (the number of sets of fixing rings 17 may vary depending on the actual length of the housing 11; only eight sets are shown in the figure). Each set of fixing rings 17 includes two symmetrical rings. The distance between the fixing rings 17 and the housing 11 is greater than the distance between the fixing rings 17 and the filter unit 111. The distance between the fixed rings 17 is used to impede the flow of the fluid medium and guide the fluid medium to flow along a specified path. The cross-section of the fixed ring 17 is an isosceles trapezoid, and the width of the inner side of the fixed ring 17 is greater than the width of its outer side, so that the left and right sides of the fixed ring 17 are frustum surfaces. The distance between two adjacent sets of fixed rings 17 is greater than the distance between two adjacent fixed rings 17 in the same set. By moving the fixed rings 17 within the adjacent housings 11, seawater flows rapidly in the gap between the fixed rings 17 and the adjacent filter units 111, so that the seawater flows rapidly to wash the outer side of the corresponding filter unit 111, reducing the adhesion of impurities on the corresponding filter unit 111, thereby indirectly extending the continuous filtration time of the filter unit 111.

[0027] Reference Figure 2 and Figure 3As shown, a servo motor 18, which is electrically connected to the control panel, is fixed to the left side of the housing 11 via a connecting frame. The output shaft of the servo motor 18 is equipped with a lead screw 19 that is threadedly engaged with the adjacent sliding frame 16. The reciprocating rotation amplitude and reciprocating rotation frequency of the conveying shaft on the servo motor 18 are set by the control panel, thereby controlling the reciprocating movement range and reciprocating movement speed of the fixed ring 17, guiding the seawater inside the housing 11 to flow and scour the corresponding filter unit 111 to different degrees, further reducing the degree of adhesion of impurities on the corresponding filter unit 111.

[0028] When using seawater for aquaculture, the operator connects a pipe to the inlet end of the inlet unit 12, and then places the pipe into the seawater. The operator then starts the pump in the inlet unit 12 and opens the valve on it via the control panel. Initially, both solenoid valves 15 on the inlet unit 12 are open, and seawater enters the two housings 11 through the inlet unit 12. Then, the flow rate of seawater discharged from the discharge unit 13 is controlled by the opening state of the valve in the discharge unit 13. At this time, the pressure of the seawater supplied by the pump in the inlet unit 12 causes the seawater in the housing 11 to pass through the corresponding filter unit 111 under high pressure. Then, the treated clean water is discharged through the discharge pipe 14 and enters the next treatment stage. After that, the pump in the inlet unit 12 continues to work to continuously treat the seawater. After the clean water is discharged, the seawater concentration in the housing 11 gradually increases, and some crystal particles precipitate out of the seawater in the housing 11. Some crystal particles adhere to the outside of the filter unit 111.

[0029] During the continuous treatment of seawater, the control panel intermittently starts the output shaft of the servo motor 18 to reciprocate. The output shaft of the servo motor 18 drives the lead screw 19 to reciprocate. The rotation of the lead screw 19 causes the sliding frame 16 to drive the eight sets of fixed rings 17 to reciprocate. During the reciprocating movement, the fixed rings 17 agitate the seawater inside the housing 11. Since the left and right sides of the fixed rings 17 are frustums, the fixed rings 17 guide the seawater inside the housing 11 to rotate around them during the movement. Also, because the distance between the fixed rings 17 and the filter unit 111 is relatively small, the seawater flowing between the fixed rings 17 and the filter unit 111 has a fast flow rate. The fast-flowing seawater cleans the outer surface of the filter unit 111 with force, reducing the amount of crystal particles attached to the outer surface of the filter unit 111. This causes some crystal particles to be suspended in the seawater inside the housing 11. Subsequently, the seawater carries the crystal particles out of the drainage unit 13, thereby indirectly extending the continuous filtration time of the filter unit 111.

[0030] After the filter unit 111 has been treating seawater for a long time, or when the flow sensor in the drain pipe 14 detects that the flow rate of the purified water inside is too low, the operator first closes the solenoid valve 15 connected to the corresponding housing 11 through the control panel to stop the seawater from being injected into the housing 11. Then, the operator injects some purified water into the corresponding drain pipe 14 through an external water pump. Subsequently, the purified water flows in reverse through the corresponding filter unit 111 to backwash and clean the filter unit 111, reducing the amount of impurities such as crystal particles attached to the filter unit 111. After backwashing for a period of time, the operator stops the backwashing operation and then restarts the corresponding solenoid valve 15 through the control panel.

[0031] After backwashing one of the filter units 111, the operator repeats the above operation to backwash the other filter unit 111, so that the two filter units 111 are backwashed alternately during the non-stop seawater purification process, maintaining the continuous discharge of clean water. After both filter units 111 have completed backwashing, the operator opens the two solenoid valves 15, so that the two filter units 111 can purify the seawater at full capacity.

[0032] Example 2: Based on Example 1, referring to... Figure 2 , Figure 5 and Figure 6As shown, it also includes two evenly distributed sliding shells 20, which are slidably disposed on the right side of adjacent shells 11. The front of each sliding shell 20 has a liquid guiding cavity communicating with an adjacent drain outlet on the liquid inlet unit 12. A liquid guiding pipe 21 communicating with the liquid guiding cavity on the left side of each sliding shell 20 is fixedly connected to the sliding shell 20. The liquid guiding pipe 21 has eight drain outlets and eight evenly distributed fixing sleeves 22 are fixedly connected to it. Both sides of the inner surface of each fixing sleeve 22 are frustum-shaped to guide corresponding fixing rings 17 into them. The eight fixing sleeves 22 and eight sets of fixing rings 17 are staggered within the same shell 11. An electric push rod 23, electrically connected to the control panel, is fixedly connected to the right side of the shell 11 via a connecting frame. The telescopic end of the electric push rod 23 penetrates the adjacent shell 11 and is slidably connected to it. The telescopic end of the electric push rod 23 is fixedly connected to the adjacent sliding shell 20. The diameter of the drain outlet of the liquid guiding pipe 21 is h1, located at... The maximum distance between two fixed rings 17 in the same group is h2, and the width of the inner side of the fixed sleeve 22 is h3, h3>h2>h1. This is used to coordinate the fixed sleeve 22 to move different distances and the corresponding fixed rings 17 to move different distances, so that the fluid medium can flow in different modes. From left to right, the distance between the eight groups of fixed rings 17 and the adjacent filter units 111 gradually decreases. The distance between the eight groups of fixed rings 17 and the adjacent housings 11 is equal. The electric push rod 23 controls the shielding area of ​​the liquid guiding cavity on the adjacent sliding housing 20 on the connection port of the adjacent housing 11 and the liquid inlet unit 12, thereby controlling the seawater to be discharged from the eight drain ports on the liquid guiding pipe 21. The seawater moves outward from the inner edge of each group of fixed rings 17, so that the seawater washes the corresponding filter units 111 to different degrees, further accelerating the removal of impurities attached to the filter units 111, thereby further extending the continuous filtration time of the filter units 111.

[0033] After a period of seawater treatment, taking one of the housings 11 as an example, the operator starts the electric push rod 23 through the control panel. The telescopic end of the electric push rod 23 drives the sliding housing 20, the liquid guide pipe 21, and the eight fixed sleeves 22 to move to the left together. The sliding housing 20 moves to the right so that its upper liquid guide cavity is connected to the liquid inlet unit 12. At the same time, the eight fixed sleeves 22 move to be located outside the adjacent set of fixed rings 17, and the eight drain ports of the liquid guide pipe 21 are located between two adjacent fixed rings 17. Subsequently, during the operation of the pump body in the liquid inlet unit 12, the liquid enters the water... The liquid unit 12 delivers seawater through the liquid guiding cavity on the sliding shell 20 to the adjacent liquid guiding pipe 21. The liquid guiding pipe 21 guides the seawater into the eight sets of fixed rings 17. Subsequently, the seawater passes through the gap between the fixed rings 17 and the filter unit 111. Because the gap between the fixed rings 17 and the filter unit 111 is small, the liquid flowing out from the gap between the fixed rings 17 and the filter unit 111 flows faster. The fast-flowing seawater washes the outer surface of the filter unit 111, reducing the amount of crystalline particulate impurities adhering to the outer surface of the filter unit 111, thereby extending the effective filtration time of this device.

[0034] As seawater flows through the eight sets of fixed rings 17, the distance between the eight sets of fixed rings 17 and the filter unit 111 gradually increases from right to left. The flow velocity of the eight sets of fixed rings 17 gradually weakens from right to left, resulting in a greater impact force of seawater on the right side of the filter unit 111. This reduces the amount of crystal particles adhering to the outer surface of the filter unit 111. At the same time, the eight sets of fixed rings 17 spray water together, allowing seawater to penetrate the corresponding filter unit 111 evenly, improving the utilization rate of the filter unit 111, and thus further extending the continuous filtration time of this device.

[0035] In the above working mode, the control panel controls the output shaft of the servo motor 18 to reciprocate. The servo motor 18 controls the sliding frame 16 and eight sets of fixed rings 17 to reciprocate left and right through the lead screw 19. The two fixed rings 17 in the same set are always connected to the drain port of the corresponding liquid guide pipe 21 during the reciprocating movement. At this time, the reciprocating movement of the two fixed rings 17 increases the impact area of ​​seawater on the outer side of the filter unit 111, thereby further reducing the amount of crystal particles attached to the outer side of the filter unit 111.

[0036] When treating seawater of different concentrations in different areas, the operator selects different working modes. With the liquid guiding cavity on the sliding shell 20 connected to the liquid inlet unit 12, the operator controls the reciprocating rotation amplitude and frequency of the output shaft on the servo motor 18, and controls the reciprocating movement range and frequency of the eight sets of fixed rings 17. The faster the reciprocating movement frequency of the fixed rings 17, the greater the impact force of the seawater on the corresponding filter unit 111, which helps to extend the effective treatment time of the device for high-concentration seawater. The larger the reciprocating movement amplitude of the fixed rings 17, the greater the impact force of the seawater on the corresponding filter unit 111, which facilitates the extension of the effective treatment time of the device for high-concentration seawater. The larger the reciprocating movement amplitude of the fixed rings 17, the more the drain port on the liquid guiding pipe 21 is located between the two corresponding fixed rings 17, and then outside the two corresponding fixed rings 17. This causes the seawater to flow back and forth in the gap between the fixed rings 17 and the filter unit 111, which enhances the scouring of the crystal particles attached to the filter unit 111 by the seawater, weakens the adhesion strength of the crystal particles on the filter unit 111, and thus further extends the effective filtration time of the device.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A seawater purification device for aquaculture, characterized in that: The device includes a support (1), on which a plurality of housings (11) are evenly distributed. Each housing (11) contains a filter unit (111). The support (1) is equipped with a liquid inlet unit (12) and a liquid outlet unit (13). The two sides of the housing (11) are fixedly connected to and communicate with the liquid inlet unit (12) and the liquid outlet unit (13) respectively. A drain pipe (14) is fixedly connected to and communicates with the side of the housing (11) away from the liquid inlet unit (12), and the drain pipe (14) communicates with the interior of the adjacent filter unit (111). A solenoid valve (15) is installed at the communication points between the liquid inlet unit (12) and the plurality of housings (11). The solenoid valve (15) is used to control the liquid flow path. A sliding frame (16) is slidably provided on the housing (11). A plurality of evenly distributed fixed rings (17) are fixedly connected to the sliding frame (16). Each set of fixed rings (17) includes two symmetrical rings. The distance between the fixing ring (17) and the housing (11) is greater than the distance between the fixing ring (17) and the filter unit (111), which is used to impede the flow of the fluid medium and guide the fluid medium to flow along a specified path; The distance between two adjacent sets of fixed rings (17) is greater than the distance between two adjacent fixed rings (17) in the same set; A servo motor (18) is fixedly connected to the side of the housing (11) near the drain pipe (14) via a connecting frame. A lead screw (19) is installed on the output shaft of the servo motor (18). The lead screw (19) is threadedly engaged with the adjacent sliding frame (16). The servo motor (18) is used to control the reciprocating range of the sliding frame (16). It also includes a plurality of evenly distributed sliding shells (20), which are slidably disposed in adjacent housings (11). Each sliding shell (20) is provided with a liquid guiding cavity. Each sliding shell (20) is fixedly connected to a liquid guiding pipe (21) communicating with its liquid guiding cavity. The liquid guiding cavity of the sliding shell (20) is connected and cooperates with the liquid inlet unit (12). Each liquid guiding pipe (21) is fixedly connected to a plurality of evenly distributed fixing sleeves (22). The plurality of fixing sleeves (22) in the same housing (11) are staggered with a plurality of fixing rings (17).

2. The seawater purification device for aquaculture according to claim 1, characterized in that: The cross-section of the fixing ring (17) is an isosceles trapezoid, and the width of the inner side of the fixing ring (17) is greater than the width of its outer side.

3. The seawater purification device for aquaculture according to claim 2, characterized in that: An electric push rod (23) is fixedly connected to the side of the housing (11) away from the drain pipe (14) via a connecting frame. The telescopic end of the electric push rod (23) penetrates the adjacent housing (11) and is slidably connected to it. The telescopic end of the electric push rod (23) is fixedly connected to the adjacent sliding shell (20). The electric push rod (23) is used to control the area of ​​the liquid guiding cavity on the adjacent sliding shell (20) that blocks the connection between the adjacent housing (11) and the liquid inlet unit (12).

4. The seawater purification device for aquaculture according to claim 3, characterized in that: Both sides of the inner side of the fixing sleeve (22) are set as frustum surfaces to guide the corresponding fixing ring (17) into it.

5. A seawater purification device for aquaculture according to claim 4, characterized in that: The diameter of the connection between the liquid guide tube (21) and the fixed sleeve (22) is h1, the maximum distance between the two fixed rings (17) in the same group is h2, and the width of the inner side of the fixed sleeve (22) is h3, h3>h2>h1, which is used to coordinate the fixed sleeve (22) to move different distances and the corresponding fixed rings (17) to reciprocate different distances, so that the fluid medium can flow in different modes.

6. A seawater purification device for aquaculture according to claim 5, characterized in that: The distance between the multiple sets of fixed rings (17) and the adjacent filter unit (111) in the direction from the drain pipe (14) to the electric push rod (23) gradually decreases, and the distance between the multiple sets of fixed rings (17) and the adjacent housing (11) is equal.

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