Water-salt separation device capable of effectively preventing reverse osmosis membrane from bursting

Abstract

The utility model discloses a water-salt separation device capable of effectively preventing a reverse osmosis membrane from bursting. The water-salt separation device comprises a tank body, the reverse osmosis membrane which is arranged in the tank body and is used for water-salt separation, and a constant-pressure component which is arranged in the tank body and is positioned below the reverse osmosis membrane, the constant-pressure assembly comprises a screw rod rotationally connected with the bottom of the tank body through a torsion spring rod, a screw disc which sleeves the screw rod and is in sliding sealing connection with the inner wall of the tank body, a damping rod of which one end is connected with the bottom of the tank body and the other end is connected with the screw disc, and an air column; the air pressure sensor is arranged on the tank body and is used for detecting the air pressure between the spiral disc and the reverse osmosis membrane; stirring rods are fixedly arranged at the top ends of the screws; according to the device, the constant-pressure assembly is arranged, so that the salt-water separation efficiency is improved, and meanwhile, the use cost of the device is reduced through repeated use of gas; meanwhile, the damage to the reverse osmosis membrane in the running process of the device can be fully avoided through the alarm module.

Description

Technical Field

[0001] The utility model relates to the technical field of water-salt separation, in particular to a water-salt separation device which can effectively prevent a reverse osmosis membrane from bursting. Background Art

[0002] Using reverse osmosis membrane to separate water and salt is the most advanced, energy-saving and environmentally friendly desalination method, and has become the mainstream pre-desalination process. Reverse osmosis membranes, like ultrafiltration membranes and other filter membranes, allow water to pass through the pores on the surface of the membrane area, and then retain substances such as impurities and viruses. Water molecules pass through the surface of the filter membrane to achieve the filtering effect. For example, reverse osmosis treats seawater, obtains fresh water on the low-pressure side of the membrane, and obtains brine on the high-pressure side.

[0003] The main separation target of the reverse osmosis membrane is the ion range in the solution. It does not require chemicals and can effectively remove salt from the water. The system desalination rate is generally above 98%. In the prior art, the reverse osmosis membrane is also commonly set in the water-salt separation equipment. At the same time, it is often because the gas is not completely exhausted when restarting, and the pressure is quickly increased. Under the strong pressure, the air forms an air hammer, which causes the reverse osmosis membrane to be damaged and reduces the service life of the reverse osmosis membrane. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a water-salt separation device which can effectively prevent the reverse osmosis membrane from bursting.

[0005] The technical scheme of the utility model is: a water-salt separation device for effectively preventing the reverse osmosis membrane from bursting, comprising a tank body, a reverse osmosis membrane for water-salt separation arranged in the tank body, and a constant pressure assembly arranged in the tank body and located below the reverse osmosis membrane; the reverse osmosis membrane divides the tank body into a pure water chamber and a salt water chamber from top to bottom; the constant pressure assembly comprises a screw rod rotatably connected to the bottom of the tank body through a torsion spring rod, a screw plate sleeved on the screw rod and connected to the inner wall of the tank body in a sliding and sealing manner, a damping rod connected to the bottom of the tank body at one end and connected to the screw plate at the other end, an air column, and an air pressure sensor arranged on the tank body and used for detecting the air pressure between the salt collection chamber and the reverse osmosis membrane; a stirring rod is fixedly provided at the top end of the screw rod; a first air port is provided on the tank body between the reverse osmosis membrane and the salt collection chamber, and a second air port is provided at the bottom of the air column; the second air port is communicated with the first air port through a pipeline; and a solenoid valve is provided in the pipeline.

[0006] Furthermore, the spiral disc is provided with a cavity for collecting salt, the top of the spiral disc is provided with a slot for feeding salt, a sealing plate is slidably provided at the top of the cavity and below the slot, and a push switch for controlling the sliding opening and closing of the sealing plate is built into the top of the spiral disc; the stirring rod comprises a rod body, soft brushes arranged at the top and bottom of the rod body, and a telescopic component for cooperating with the push switch to be pressed is provided on one side of the bottom of the rod body;

[0007] Description: The grooves and sealing plates on the surface of the spiral disc and the setting of the push switch can meet the needs of further collecting salt when the amount of water in the brine chamber is small, reducing the possibility of a large amount of brine flowing into the spiral disc without being treated by the reverse osmosis membrane. Collecting salt by rotating the rod can also reduce the frequency of staff opening the can to collect salt, thereby improving the use effect of the device; the setting of the soft bristles can brush off the residual salt at the bottom of the reverse osmosis membrane and the salt on the surface of the spiral disc when the screw is rotating, further improving the salt collection efficiency.

[0008] Furthermore, one side of the bottom of the rod body has a cavity, and the telescopic assembly includes a spring arranged in the cavity, and a pressing block slidably arranged in the cavity and connected to the other end of the spring; the pressing block is arranged corresponding to the pressing switch, and the top of the pressing switch is located on the same plane as the top of the screw disk and can contact the pressing switch;

[0009] Note: The above settings are mainly to avoid the situation where the push switch is accidentally triggered under the gravity of the entire solution, thereby improving the salt collection effect.

[0010] Furthermore, a water collecting bin for collecting pure water from the pure water cavity is provided on the side of the tank body, and a water pump is provided in the water collecting bin;

[0011] Note: The above arrangement can further collect and reuse the pure water after water-salt separation, thus achieving the purpose of saving water resources.

[0012] Furthermore, an alarm module for monitoring the air pressure in the saline cavity is provided on the top of the tank body;

[0013] Note: The alarm module can substantially reduce the damage to the reverse osmosis membrane during the operation of the device.

[0014] Furthermore, a liquid inlet is provided on the tank body and below the reverse osmosis membrane, and a filter plate is provided in the liquid inlet;

[0015] Note: Pretreatment of the influent can effectively remove suspended solids, particulate matter, and organic matter, and can avoid clogging or contamination of the reverse osmosis membrane, thereby delaying the service life of the reverse osmosis membrane.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model adjusts and controls the pressure on the concentrated liquid side of the reverse osmosis membrane inside the tank body through a constant pressure component, so that the pressure on the concentrated liquid side of the reverse osmosis membrane is always maintained within a reasonable range, and utilizes the pushing effect of the salt collection chamber on the concentrated liquid to allow the concentrated liquid to pass through the reverse osmosis membrane to achieve brine separation, thereby effectively improving the brine separation effect of the device; the setting of the constant pressure component of the device not only ensures the improvement of the brine separation efficiency, but also reduces the use cost of the device by reusing the gas; at the same time, the alarm module can fully reduce the damage to the reverse osmosis membrane during the operation of the device.

[0018] (2) The water-salt separation equipment proposed by the utility model can slowly pressurize the concentrated liquid side of the reverse osmosis membrane under the action of the damping rod. Even when it is restarted, the air pressure sensor can ensure that there will be no rapid pressure increase inside the equipment, which effectively reduces the situation where the equipment forms an air hammer under strong pressure, thereby causing damage to the reverse osmosis membrane and prolonging the service life of the reverse osmosis membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of Example 1 of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of Embodiment 1 of the present utility model;

[0021] Figure 3 It is a schematic diagram of the internal structure of Embodiment 2 of the present utility model;

[0022] Figure 4 yes Figure 3 A local enlarged view of point A;

[0023] Figure 5 This is a schematic structural diagram of a stirring rod in Embodiment 2 of the present utility model;

[0024] Figure 6 It is a cross-sectional view of the installation cavity of Embodiment 3 of the utility model when it contacts the surface of the screw disk;

[0025] Among them, 1-tank body, 11-liquid inlet, 12-first air port, 2-reverse osmosis membrane, 3-constant pressure assembly, 31-screw, 311-stirring rod, 3111-rod body, 3112-soft brush, 3113-spring, 3114-pressing block, 32-screw disk, 321-slot, 322-sealing plate, 323-pressing switch, 33-damping rod, 34-air column, 341-second air port, 35-air pressure sensor, 36-alarm module. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with specific implementation methods to better reflect the advantages of the present invention.

[0027] Example 1: Figure 1 , Figure 2 The water-salt separation device shown in the figure can effectively prevent the reverse osmosis membrane from bursting, comprising a tank body 1, a reverse osmosis membrane 2 for water-salt separation arranged in the tank body 1, and a constant pressure assembly 3 arranged in the tank body 1 and below the reverse osmosis membrane 2; a liquid inlet 11 is arranged on the tank body 1 and below the reverse osmosis membrane 2, and a filter plate is arranged in the liquid inlet 11; the pore size of the filter plate is 0.2-3 μm; the constant pressure assembly 3 comprises a screw rod 31 rotatably connected to the bottom of the tank body 1 through a torsion spring rod, a screw plate 32 sleeved on the screw rod 31 and slidably sealed with the inner wall of the tank body 1, one end of which is connected to the bottom of the tank body 1 and the other end is connected to the screw plate 32 A damping rod 33, an air column 34, and an air pressure sensor 35 arranged on the tank body 1 and used to detect the air pressure between the screw plate 32 and the reverse osmosis membrane 2; a stirring rod 311 is fixedly provided at the top of the screw rod 31; a first air port 12 is arranged on the tank body 1 between the reverse osmosis membrane 2 and the screw plate 32, and a second air port 341 is arranged at the bottom of the air column 34; the second air port 341 is connected to the first air port 12 through a pipeline; a solenoid valve is arranged in the pipeline; the reverse osmosis membrane 2 separates the tank body 1 from top to bottom into a pure water chamber and a salt water chamber; a water collecting tank for collecting pure water from the pure water chamber is arranged on the side of the tank body 1, and a water pump is arranged in the water collecting tank;

[0028] The working principle of this embodiment is as follows: the saline solution is passed into the tank body 1 after passing through the filter plate from the liquid inlet 11, and the spiral disc 32 is pressed down by gravity. The damping rod 33 provided at the bottom of the spiral disc 32 can slow down the descending rate of the spiral disc 32. The downward pressure of the spiral disc 32 drives the screw rod 31 to rotate, and the stirring rod 311 rotates at this time to stir the water-salt solution, which is convenient for the subsequent water-salt separation. The spiral disc 32 is pressed down and slowly squeezes the air column 34 for pressurization. The pressure is detected by the air pressure sensor 35 during the pressurization process. After reaching the minimum air pressure value, the liquid addition is stopped, and the gas circulation pipeline is closed. Under the action of the torsion spring rod, the screw rod 31 is reversed, driving the spiral disc 32 to move upward, accelerating the working efficiency of the reverse osmosis membrane 2. During the process, the air pressure sensor 35 continuously detects the pressure. When the pressure reaches the upper limit value, the gas circulation pipeline is opened to allow the gas to flow into the air column 34 again for the next inflation; the pump body is opened to collect the pure water above the reverse osmosis membrane 2 for standby use.

[0029] Embodiment 2: Different from Embodiment 1, Figure 3 , Figure 4 , Figure 5As shown, a cavity for collecting salt is provided in the spiral disc 32, a slot 321 for feeding salt is provided on the top of the spiral disc 32, a blocking plate 322 is slidably provided on the top of the cavity and below the slot 321, and a push switch 323 for controlling the sliding opening and closing of the blocking plate 322 is built into the top of the spiral disc 32;

[0030] The stirring rod 311 includes a rod body 3111, a soft brush 3112 arranged at the top and bottom of the rod body 3111, and a telescopic component for cooperating with the pressing switch 323 to be pressed on one side of the bottom of the rod body 3111; the telescopic component is a commercially available telescopic rod; the length of the soft brush 3112 should be greater than or equal to the height value raised by the screw disc 32 when it rotates on the screw rod 31 for at least one circle, so as to ensure the effective collection of salt on the surface of the screw disc 32; the top of the soft brush 3112 is always in contact with the bottom of the reverse osmosis membrane 2; the commercially available telescopic rod is arranged on one side of the rod body 3111, which satisfies the requirement that the telescopic rod presses the pressing switch 323 during the rotation of the rod body 3111 and simultaneously moves the rod body 3111 to the slot 321, that is, the effective collection of salt during the rotation of the rod body 3111 can be achieved;

[0031] Different from Example 1, the working principle of this embodiment is: when the spiral disk 32 reaches the highest point, the bottom of the stirring rod 311 contacts the top surface of the spiral disk 32, and the salt on the top surface of the spiral disk 32 is collected once, and the bottom of the stirring rod 311 opens the sealing plate 322 through the pressing switch 323, and pushes the salt into the slot 321.

[0032] Embodiment 3: Different from embodiment 2, Figure 6 As shown, one side of the bottom of the rod body 3111 has a cavity, and the telescopic assembly includes a spring 3113 disposed in the cavity, and a pressing block 3114 slidably disposed in the cavity and connected to the other end of the spring 3113; the pressing block 3114 is disposed corresponding to the pressing switch 323, and the top of the pressing switch 323 is located on the same plane as the top of the screw disk 32 and can contact the pressing switch 323; Figure 6 The bottom of the middle pressing block 3114 is in contact with the screw disk 32 and is compressed;

[0033] The working principles of this embodiment are basically the same as those of Embodiment 2, except that: when the rod body 3111 rotates at other positions on the top of the screw disk 32, the spring 3113 is compressed and energy is stored, and then the pressing block 3114 at the press switch 323 moves downward under the action of the restoring force of the spring 3113, thereby pressing the press switch 323 and further opening the blocking plate 322 for material removal.

[0034] Embodiment 4: Different from Embodiment 1, an alarm module 36 for monitoring the air pressure in the saline cavity is provided on the top of the tank body 1; the air pressure sensor 35 is also connected to the signal amplification module, the signal conversion module and the alarm module 36; a comparison unit is provided in the alarm module 36, which receives the air pressure value signal collected by the air pressure sensor and compares it with the two end values ​​of its preset air pressure value range. When the air pressure value collected by the air pressure value sensor reaches the minimum air pressure value, the alarm module 36 is activated for the first time, and the gas circulation pipeline is closed by controlling the electromagnetic valve at this time. When the air pressure value reaches the upper limit of the air pressure, the alarm module 36 is activated for the second time, and the gas circulation pipeline is opened by controlling the electromagnetic valve at this time.

[0035] The working principle of this embodiment is basically the same as that of embodiment 1, except that: the salt solution is passed into the tank body 1 after passing through the filter plate from the liquid inlet 11, and the spiral disc 32 is pressed down by gravity. A damping rod 33 is provided at the bottom of the spiral disc 32 to slow down the descending rate of the spiral disc 32. The spiral disc 32 is pressed down to drive the screw 31 to rotate, and the stirring rod 311 rotates at this time to stir the water-salt solution, which is convenient for the subsequent water-salt separation. The spiral disc 32 is pressed down to slowly squeeze the air column 34 for pressurization. The pressure is detected by the air pressure sensor 35 during the pressurization process. When the minimum air pressure value is reached, an alarm is issued, the liquid addition is stopped, and the gas circulation pipeline is closed. Under the action of the torsion spring rod, the screw 31 Reverse, drive the spiral disk 32 to move upward, accelerate the working efficiency of the reverse osmosis membrane 2, during the process, the air pressure sensor 35 continuously detects the pressure, when the pressure reaches the upper limit, alarm and then open the gas flow pipe, so that the gas flows into the gas column 34 again, in preparation for the next inflation; when the salt collection chamber 32 reaches the highest point, the bottom of the stirring rod 311 contacts the top surface of the spiral disk 32, and the salt on the top surface of the spiral disk 32 is collected once, the bottom of the stirring rod 311 opens the sealing plate 322 through the pressing switch 323, and pushes the salt to fall into the slot 321; open the pump body to collect the pure water above the reverse osmosis membrane 2 for use.

Claims

1. A water-salt separation device that effectively prevents reverse osmosis membrane bursting, characterized in that: The invention comprises a tank body (1), a reverse osmosis membrane (2) arranged in the tank body (1) for water-salt separation, and a constant pressure assembly (3) arranged in the tank body (1) and located below the reverse osmosis membrane (2); the reverse osmosis membrane (2) divides the tank body (1) into a pure water chamber and a salt water chamber from top to bottom; the constant pressure assembly (3) comprises a screw rod (31) rotatably connected to the bottom of the tank body (1) via a torsion spring rod, a screw disc (32) sleeved on the screw rod (31) and slidably sealed to the inner wall of the tank body (1), a damping rod (33) connected at one end to the bottom of the tank body (1) and at the other end to the screw disc (32), an air column (34), and an air pressure sensor (35) arranged on the tank body (1) and used to detect the air pressure between the screw disc (32) and the reverse osmosis membrane (2); a stirring rod (311) is fixedly provided at the top end of the screw rod (31).

2. A water-salt separation device for effectively preventing reverse osmosis membrane bursting as claimed in claim 1, characterized in that: A cavity for collecting salt is provided in the spiral disc (32), a slot (321) for feeding salt is provided on the top of the spiral disc (32), a blocking plate (322) is slidably provided on the top of the cavity and below the slot (321), and a push switch (323) for controlling the sliding opening and closing of the blocking plate (322) is built into the top of the spiral disc (32); The stirring rod (311) comprises a rod body (3111), soft brushes (3112) arranged at the top and bottom of the rod body (3111), and a telescopic component for cooperating with the pressing of the push switch (323) is provided on one side of the bottom of the rod body (3111).

3. A water-salt separation device for effectively preventing reverse osmosis membrane bursting as claimed in claim 2, characterized in that: One side of the bottom of the rod body (3111) has a cavity, and the telescopic component includes a spring (3113) arranged in the cavity, and a pressing block (3114) slidably arranged in the cavity and connected to the other end of the spring (3113); the pressing block (3114) is arranged corresponding to the pressing switch (323), and the top of the pressing switch (323) is located on the same plane as the top of the screw disk (32) and can contact the pressing switch (323).

4. A water-salt separation device for effectively preventing reverse osmosis membrane bursting as claimed in claim 1, characterized in that: A water collecting bin for collecting pure water from the pure water chamber is provided on the side of the tank body (1), and a water pump is provided in the water collecting bin.

5. A water-salt separation device for effectively preventing reverse osmosis membrane bursting as claimed in claim 1, characterized in that: An alarm module (36) for monitoring the air pressure in the saline cavity is provided on the top of the tank body (1).

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