CN2401538Y - Magnetic ion sieve sea water desalination device - Google Patents

Abstract

The utility model relates to a magnetic ion sieve sea water desalination device, which consists of an intake water storage tank and a desalted water storage case. The utility model is characterized in that the magnetic ion sieve sea desalination device comprises an ion fractionation case, the ion fractionation case comprises a NdFeB permanent magnetism pole pair, a filter tube with reverse osmosis membrane and a base with filtering pipe socket, the NdFeB permanent magnetism pole pair is installed on the side wall of the ion fractionation case, the filter tube with reverse osmosis membrane is fixed to the base with filtering pipe socket, and the upper part is provided with a reverse osmosis membrane which is partially inserted into the lower part of the magnetic field space; the intake water storage tank is connected with the ion fractionation case, the desalted water storage case is connected with the ion fractionation case. Because the utility model puts the kinetic energy of molecular movement as a predominant dynamic force of ion fractionation and the electric energy and the electric pole are not needed, the corrosion behavior produced by the electrochemical reaction is greatly alleviated.

Description

Magnetic ion sieve seawater desalination device

The utility model belongs to the field of seawater desalination, in particular to a magnetic ion sieve seawater desalination device.

At present, the seawater desalination technologies in the world mainly include the following types:

1. Reverse Osmosis Reverse Osmosis (RO)

2. Electrodeionization (EDI)

3. Electrodialysis Reversal (EDR)

The seawater desalination device manufactured by using the above-mentioned seawater desalination technology mainly has the following deficiencies: the reverse osmosis method needs to overcome the osmotic pressure, usually requires a relatively high working pressure, such as the osmotic pressure of seawater is about 2.7MPa, and the working pressure Then use 10.5Mpa, to achieve such a pressure will consume a considerable amount of energy, and put forward higher requirements for the sealing of the device. Electrodeionization and reverse electrodialysis use direct current as power. Electrodeionization generally does not directly treat seawater, but first uses reverse osmosis to pretreat seawater. Otherwise, the energy consumption and equipment loss will be relatively large. It is suitable for the production of high-purity water, but not suitable for large-scale seawater treatment.

The purpose of this utility model is to overcome the deficiencies of the above-mentioned technologies, and provide a magnetic ion sieve seawater desalination device, which saves energy and greatly reduces the cost of seawater desalination compared with the existing technology, thereby making the seawater desalination technology fully practical .

The magnetic ion sieve seawater desalination device includes an inlet water storage tank and a desalinated water storage tank, and is characterized in that it also includes an ion separation box. The base of the installation hole is composed of; the NdFeB permanent magnet pole pair is relatively installed on the side wall of the ion separation box, the filter tube equipped with the reverse osmosis membrane is fixed on the installation hole of the filter tube of the base, and the upper end of the reverse osmosis membrane is partially inserted The lower end of the magnetic field space; the water inlet storage tank is connected with the ion separation box, and the desalinated water storage tank is connected with the ion separation box.

Since the utility model adopts NdFeB permanent magnet pole pairs, the kinetic energy of molecular motion is used as the main power of ion separation, and some energy is consumed by driving water molecules through the reverse osmosis membrane only by water pressure difference, and the external energy used is The potential energy difference of this small water is much lower than the energy consumed in reverse osmosis to create an additional high pressure to overcome the osmotic pressure; no electric energy and electrodes are needed, thus greatly alleviating the corrosion caused by the electrochemical reaction.

Fig. 1 is the front schematic diagram of structure of the present utility model;

Fig. 2 is the side schematic diagram of structure of the present utility model;

Fig. 3 is a top view of the ion separation box.

Describe in detail below in conjunction with accompanying drawing.

As shown in the figure, 1 is the water inlet pipe, 2 is the water tank, 3 is the water inlet filter plate, 4 is the ion separation box, 5 is the permanent magnet pole pair N pole, 6 is the permanent magnet pole pair S pole, 7 is the soft magnetic material Plate, 8 is a filter tube equipped with a reverse osmosis membrane cover, 9 is a concentrated water discharge outlet, 10 is a desalinated water storage tank, 11 is a desalinated water outlet pipe, and 12 is a support.

The magnetic ion sieve seawater desalination device includes an inlet water storage tank and a desalinated water storage tank, and is characterized in that it also includes an ion separation box. The base of the installation hole is composed of; the NdFeB permanent magnet pole pair is relatively installed on the side wall of the ion separation box, the filter tube equipped with the reverse osmosis membrane is fixed on the installation hole of the filter tube of the base, and the upper end of the reverse osmosis membrane is partially inserted The lower end of the magnetic field space; the water inlet storage tank is connected with the ion separation box, and the desalinated water storage tank is connected with the ion separation box.

The water inlet storage tank is composed of the water inlet pipe, the water tank and the water inlet filter plate. The water inlet filter plate has evenly distributed small holes with small diameters, which can filter the insoluble impurities once, so as to prevent impurities from entering the device and contaminating the reverse osmosis membrane; The water tank is welded by PVC board, the upper part is connected to the water inlet pipe, and the lower part is connected to the ion separation box through the water inlet filter plate. The main function of the water tank is to store the water to be treated, and make the water to be treated In a relatively stable state to avoid turbulent flow in the ion separation chamber.

The ion separation box is a cuboid water tank welded by PVC board. The upper end of its four sides is welded and connected with the lower end of the four sides of the water inlet storage tank, and its top is connected with the bottom of the water inlet storage tank through the water inlet filter plate. The base is directly welded on the desalinated water storage tank.

In order to facilitate the installation of permanent magnet pole pairs, a mounting clip is specially designed. The mounting clip is a cuboid whose side wall is welded with PVC plates. Its internal dimensions are exactly the same as those of permanent magnetic poles. A soft magnetic material plate is welded inside. The mounting clip is directly welded to the side wall of the ion separation box, and the permanent magnet poles are then loaded into the mounting clip. Before the soft magnetic material board is a blank space sandwiched between two PVC boards, the purpose of which is to reduce the divergence of the magnetic field.

The filter tube equipped with reverse osmosis membrane plays a very important role in this device: 1. It leads out the seawater with low ion concentration in the magnetic field space, and realizes the separation of seawater inside and outside the magnetic field space; 2. Because the filter tube The reverse osmosis membrane is installed at the water inlet of the water tank, which allows water molecules to pass through the membrane and enter the filter tube to flow out, while ions cannot pass through the reverse osmosis membrane and remain in the ion separation box, thereby finally realizing seawater desalination.

The outside of the part inserted into the base in the middle of the filter tube should be tightly fitted with a screw ring corresponding to the bolt in the base. The upper end of the screw ring should also be equipped with an anti-seepage sealing ring, and the length is 20cm-30cm longer than the thickness of the base. This is mainly for the convenience of installing and replacing the reverse osmosis membrane and filter tube. The filter tube is fixed on the base by bolts, and its upper end is equipped with a reverse osmosis membrane part inserted into the lower end of the magnetic field space, and its lower end should have a longer section after coming out of the base, and a water outlet switch is installed at its lower end.

In order to facilitate the replacement of the reverse osmosis membrane, a membrane sleeve is specially manufactured. The inner diameter of the membrane sleeve is slightly larger than that of the filter tube. A permeable membrane is installed and fixed on the upper surface, and a sealing ring is installed at the lower end. The membrane sleeve is directly placed on the upper end of the filter tube. The choice of reverse osmosis membrane The pore size of the surface layer of the cellulose acetate membrane (abbreviated as CA membrane) is (10-20)×10-10M, and the membrane thickness is 100-250μm.

There is a filter tube insertion hole on the base of the ion separation box. The bottom of the base is triangular cone-shaped, high in the middle, and bottom on both sides. The side discharge port is centered and raised.

The desalinated water storage tank is composed of a desalinated water outlet pipe, a water tank and a bracket. The desalinated water storage tank is welded with PVC boards. The four side walls at the upper end are welded with the four side walls at the lower end of the base of the ion separation box. The desalinated water coming out of the filter tube It flows directly into this tank for storage and is discharged through the desalinated water outlet pipe. On the four corners of the lower end of the desalinated water storage tank and the middle part, a metal support is welded, and its lower end is fixed on the ground with bolts. The effect of the metal support is exactly to firmly support the whole device and make the device in a vertical state.

Seawater to be treated enters the water tank 2 through the water inlet pipe 1 , then flows downward under the action of gravity, and enters the ion separation box 4 through the water inlet filter plate 3 . There is a magnetic field space formed by NdFeB permanent magnet pole pairs 5, 6 and a non-magnetic field space outside it in the ion separation box. In the magnetic field space, due to the molecular thermal motion of ions in seawater such as Na+, Cl-, Mg2+, Ca2+, etc., relatively more ions escape from the magnetic field space and enter the non-magnetic field due to the Lorentz action of the magnetic field. space, so that the ion concentration of seawater in the magnetic field space decreases, while the ion concentration of seawater in the non-magnetic field space increases. Simultaneously, the hydrated water molecule performs molecular thermal motion in the magnetic field space, and the hydrogen bond between the water molecules will be destroyed, but the water molecule exists more in the form of free water molecule, thus it is easier to react with the filter tube 8 upper end. Permeable Membrane Association. The water molecules in the magnetic field space associate with the reverse osmosis membrane, and are pushed through the reverse osmosis membrane under the push of the water pressure difference created by gravity and the pull of the water molecules at the lower end of the membrane. After the water molecule passes through the reverse osmosis membrane, under the action of gravity and the infiltration of the water molecule itself and the filter tube wall, it quickly leaves the reverse osmosis membrane and flows downward along the filter cylinder wall, and in turn acts on the water molecules in the membrane. Create a pull. Since only water molecules can pass through the reverse osmosis membrane, and ions cannot pass through the reverse osmosis membrane, the water flowing out of the filter tube is already desalinated water. After the desalinated water flows out from the filter pipe, it enters the desalinated water storage tank 10 and is finally discharged from the desalinated water outlet pipe 11 .

Because the ions cannot pass through the reverse osmosis membrane, they are left in the ion separation box, and the concentration of seawater ions in the ion separation box continues to rise. If it is not treated in time, it will affect the impact of seawater desalination and may pollute the reverse osmosis membrane. Due to the effect of the magnetic field, the ion concentration of seawater in the non-magnetic field space is higher than that in the magnetic field space. Since the water to be treated flows in from the uppermost end of the ion separation box and flows downward, and at the same time due to the effect of gravity, the seawater ion concentration near the concentrated water discharge port 9 at the lowest point of the ion separation box is relatively the highest. Through the comprehensive calculation of the desalinated water output per unit time, the concentration of water ions to be treated, and the yield of required water, the concentrated water discharge port is opened at regular intervals to discharge a certain amount of highly concentrated seawater near it, so that the ion separation box The ion concentration of the seawater is greatly reduced, and then the concentrated water discharge port is closed, and so on.

Compared with the prior art, this device has the following advantages:

1. The energy consumption of this device is very low. This device creatively uses the kinetic energy of molecular motion as the main driving force for ion separation. It only uses the water pressure difference to drive water molecules through the reverse osmosis membrane and consumes some energy. The external energy used is the small potential energy of water. Poor, much lower than the energy consumed in reverse osmosis to create an additional high pressure to overcome the osmotic pressure; much lower than the electrical energy and power energy consumed in EDI and EDR; especially far lower than the huge energy required for evaporation and crystallization ;

2. The device is easy to maintain. Due to the low water pressure used in this device, high requirements on the sealing performance and manufacturing process of the device due to high pressure are avoided;

3. The quality of desalinated water is high. This device not only has the separation efficiency of the reverse osmosis membrane, but also effectively supplements the separation effect of ions by using a strong magnetic field. In particular, the strong magnetic field has a better separation effect on small ions that are not easily separated by the reverse osmosis membrane, making the water desalination effect It is better than ordinary reverse osmosis, and unlike EDR and EDI, although the quality of desalinated water is high, it must be pretreated by reverse osmosis;

4. The yield of water is higher. This device uses several functions to increase the concentration of concentrated water: a. Through the action of a magnetic field, more ions are left in the non-magnetic space; b. The sufficient selectivity of the reverse osmosis membrane makes it possible for ions to stay only In the ion separation box, it is discharged from the concentrated water discharge port; c. This device adopts vertical operation, and the bottom has a slope inclined from the center to the concentrated water discharge port on both sides, so that the effect of gravity can be fully utilized to keep the ions and impurities in Concentrated water is enriched at the discharge port, so that the concentration of ions and impurities is the highest; d. The water in this device flows from top to bottom, which can effectively prevent the diffusion of ions from the bottom of the ion separation box; e. It can extend the discharge of concentrated water The concentration of concentrated water increases relative to the closing time of the port. The increase of concentrated water concentration means that when the quality of total influent water and desalinated water remains unchanged, the total amount of concentrated water discharged decreases, while the output of desalinated water increases, that is, the water yield increases.

5. The cost of water pretreatment is reduced. Since the device adopts a three-dimensional separation method, ions and impurities are easier to deposit and concentrate at the bottom of the ion separation box under the action of gravity, and are discharged from the concentrated water discharge port, so the pretreatment does not need to be particularly strict; b, due to the strong magnetic field itself It has a considerable bactericidal effect, and it is not necessary to sterilize the influent water first; c. Since the use of the reverse osmosis membrane has been broken down into pieces, the reverse osmosis membrane is relatively difficult to be polluted and damaged;

6. The device does not require electric energy and electrodes, thereby greatly alleviating the corrosion effect caused by the electrochemical reaction.

Claims (4)

1, magnetic ion sieve sea water desalinating plant comprises into water water tank, desalination water bin, it is characterized in that: also comprise the ion isolation case, the ion isolation case by the NdFeB permanent magnetism magnetic pole to, the strainer tube of reverse osmosis membrane is housed and assigns the base in hole to form by strainer tube; The NdFeB permanent magnetism magnetic pole is on the sidewall that is installed in the ion isolation case relatively, and the strainer tube that reverse osmosis membrane is housed is fixed in the base strainer tube to be assigned on the hole, and the lower end that reverse osmosis membrane partly inserts magnetic field space is equipped with in its upper end; Water inlet water tank and ion isolation case join, and desalination water bin and ion isolation case join.

2, magnetic ion sieve sea water desalinating plant as claimed in claim 1 is characterized in that: be welded with in the ion isolation case sidewall folder is installed, permanent magnetism magnetic pole is contained in to be installed in the folder.

3, magnetic ion as claimed in claim 1 sieve sea water desalinating plant is characterized in that: the outside of in the middle of strainer tube, inserting the part of base closely put with base in the corresponding screw ring of bolt, the sealing-ring of water-impervious also is equipped with in screw ring upper end.

4, magnetic ion sieve sea water desalinating plant as claimed in claim 1, it is characterized in that: the bottom of base is a triangular pyramid type, and is middle high, at the bottom of the both sides.

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