A method for using a system for extracting water using cavitation effect

Abstract

A method for using a system for extracting water using cavitation effect, which relates to the use of a device for extracting water, is intended to solve the technical problems of the existing equipment for desalination of seawater using cavitation technology being complex in structure and inconvenient to install and use. The system for extracting water using cavitation effect of the present invention comprises a liquid replenishment tank, a pump, a cavitation water lifter, a water trap, a water storage tank and a controller; wherein the cavitation water lifter is provided with a cavitator, an electronic refrigeration sheet, a heat sink and a water collection tank; the liquid replenishment tank is connected to the liquid inlet end of the cavitation water lifter through a pump, and the liquid outlet end of the cavitation water lifter is connected to the pipe section between the liquid replenishment tank and the pump; the water collection tank of the cavitation water lifter is connected to the water storage tank. The mixed liquid is pressurized and pumped into the cavitation water lifter, supercavitation is generated through the cavitation, and the water vapor in the cavitation zone condenses into water droplets and flows out to obtain pure water, and at the same time obtains a concentrated liquid, which can be used in the fields of seawater desalination, sewage concentration, acid and alkali concentration, and water-containing organic waste liquid concentration and reduction.

Description

Technical Field

[0001] The invention relates to a method for using a device for extracting water, in particular to a method for using a device for extracting water using a cavitation effect. Background Art

[0002] Seawater desalination is the production of fresh water by desalination of seawater. The preparation of fresh water by seawater desalination technology can ensure the stable supply of drinking water for coastal residents or ships. Seawater desalination methods include seawater freezing method, electrodialysis method, distillation method, reverse osmosis method, cavitation method, etc. Among them, the cavitation method is to use cavitation technology to draw water vapor from seawater to desalinate the seawater. For example, the Chinese patent with publication number CN109851134A discloses a normal temperature and low pressure seawater desalination system based on induced cavitation technology. The system is generated by the water vapor of the induced cavitation generator. Due to the pressure difference on both sides of the filter membrane device, the water vapor is introduced into the liquid-gas jet pump to form a steam-water mixture, and the water vapor is pressed from the seawater circulation system into the fresh water circulation system to achieve seawater desalination. However, the device has a complex structure, requires a membrane filtration device, has high replacement costs, and is not convenient to install and use. Summary of the invention

[0003] The present invention aims to solve the technical problems of the existing equipment for desalination of seawater using cavitation technology, which has a complex structure and is inconvenient to install and use, and to provide a method for using a system for extracting water using the cavitation effect.

[0004] The method for using the system for extracting water by utilizing the cavitation effect of the present invention is carried out according to the following steps:

[0005] 1. Constructing a system for extracting water using the cavitation effect: The system includes a liquid replenishment tank 1, a pump 2, a first flow meter 3, a cavitation water extractor 4, a second flow meter 5, a steam trap 6, a water storage tank 7 and a controller 8;

[0006] The cavitation water pump 4 is composed of a pipe shell 4-1, a bracket 4-2, a cavitator 4-3, an electronic refrigeration sheet 4-4, a heat sink 4-5, a water collecting tank 4-6 and a lead-out pipe 4-7;

[0007] The bracket 4-2 is composed of fixing rods 4-2-1 evenly distributed on the circumference of the column 4-2-2, and a center hole 4-2-3 is set at the axis position of the column 4-2-2; the bracket 4-2 is fixedly connected to the inner wall of the pipeline shell 4-1 through the fixing rods 4-2-1;

[0008] The cavitator 4-3 is an axisymmetric conical or hemispherical solid structure, with a through hole 4-3-1 set at the axis position, a front end face being a plane, a rear end face being set with a groove 4-3-2, and a wire groove 4-3-3 connected to the through hole 4-3-1 being set in the groove 4-3-2; the front end face of the cavitator 4-3 is connected to the column 4-2-2 of the bracket, and the axis of the cavitator 4-3 coincides with the axis of the column 4-2-2; the hot end face of the electronic cooling sheet 4-4 is embedded in the groove 4-3-2 of the cavitator 4-3, and the electronic cooling sheet The power supply wire of 4-4 is led out of the pipeline shell 4-1 through the wire groove 4-3-3 of the cavitator 4-3, the through hole 4-3-1 and the central hole 4-2-3 of the bracket 4-2, and the wire groove 4-3-3 of the cavitator 4-3, the through hole 4-3-1 and the central hole 4-2-3 of the bracket 4-2 are sealed by resin curing; the cold end surface of the electronic refrigeration plate 4-4 is bonded to the heat sink 4-5; the water collecting tank 4-6 is arranged below the heat sink 4-5, and the lead-out pipe 4-7 is arranged below the side of the water collecting tank 4-6;

[0009] The liquid replenishment tank 1 is connected to the liquid inlet end of the cavitation water lifter 4 through the pump 2 and the first flowmeter 3. The liquid outlet end of the cavitation water lifter 4 is connected to the pipe section between the liquid replenishment tank 1 and the pump 2. A discharge pipe 9 is also provided at the liquid outlet end. The outlet pipe 4-7 of the cavitation water lifter 4 is connected to the water storage tank 7 through the second flowmeter 5 and the steam trap 6.

[0010] The controller 8 is connected to the pump 2, the first flow meter 3, the second flow meter 5, and the steam trap 6 through a circuit. The controller 8 adjusts the speed of the pump 2 and the opening and closing of the electromagnetic valve of the steam trap 6 according to the flow of the first flow meter 3 and the second flow meter 5;

[0011] 2. Add the liquid-liquid mixture containing metal ions, oil or other chemical components into the liquid replenishment tank 1, and the liquid in the liquid replenishment tank 1 is pressurized by the pump 2 and enters the cavitation water extractor 4;

[0012] 3. In the cavitation water extractor 4, due to the existence of the cavitator 4-3, the liquid flow cross-section is reduced, the liquid velocity is increased, and supercavitation occurs. The heat sink and the water collecting tank are arranged in the cavitation zone of the supercavitation. Only water vapor exists in the cavitation zone. The cooling end of the electronic refrigeration plate is connected to the heat sink. The temperature of the heat sink is reduced, which will condense the water vapor in the cavitation zone into water droplets. The water droplets fall into the water collecting tank 4-6, flow out from the lead-out pipe 4-7, and are discharged into the water storage tank through the steam trap 6 to obtain pure water; and the concentrated liquid enters the pipeline between the liquid replenishment tank 1 and the pump 2 for repeated pressurization or is discharged from the system through the discharge pipe 9 to obtain the concentrated liquid.

[0013] Furthermore, in step 1, the cone of the cavitator 4-3 is a cone or a polygonal cone.

[0014] Furthermore, in step 1, the front end surface of the cavitator 4-3 is connected to the column 4-2-2 of the bracket by bolts.

[0015] Furthermore, in step one, the hot end surface of the electronic refrigeration sheet 4-4 is bonded to the groove 4-3-2 of the cavitator 4-3 with a thermally conductive adhesive, and the thermally conductive adhesive is conducive to heat conduction.

[0016] Furthermore, in step one, the cold end surface of the electronic refrigeration sheet 4 - 4 is bonded to the heat sink 4 - 5 with thermally conductive adhesive, which facilitates cooling.

[0017] Furthermore, the system for extracting water using the cavitation effect in step one also includes a pressure gauge 10 and a thermometer 11; wherein the pressure gauge 10 and the thermometer 11 are arranged on the pipe section between the pump 2 and the cavitation water extractor 4.

[0018] Furthermore, the system for extracting water using the cavitation effect in step one also includes a liquid level meter 12 ; the liquid level meter 12 is arranged on the liquid replenishing tank 1 .

[0019] Furthermore, in step 2, the rotation speed of the pump 2 is 2500-3000 rpm. By adjusting the rotation speed of the pump and controlling the pressure of the liquid in the pipeline to 0.4-0.5 MPa, the size of the cavitation zone can be adjusted.

[0020] Furthermore, in step 2, the pressure of the liquid in the pipeline is 0.4-0.5 MPa; the temperature is at room temperature; the rotation speed is controlled to 2970 rpm and the liquid pressure is controlled to make the liquid speed reach above 27 m / s.

[0021] Furthermore, in step three, the power of the electronic cooling chip is 10~500W.

[0022] The system for extracting water by utilizing the cavitation effect of the present invention is that the pressurized liquid is placed in the cavitation water extractor 4, and supercavitation is generated due to cavitation. The heat sink and the water collecting tank are arranged in the cavitation zone of the supercavitation. Only water vapor exists in the cavitation zone. The cooling end of the electronic refrigeration plate is connected to the heat sink. The temperature of the heat sink is reduced, which will condense the water vapor in the cavitation zone into water droplets. The water droplets fall into the water collecting tank and are led out to obtain pure water. The hot end of the electronic refrigeration plate is connected to the cavitator to transfer heat to the cavitator, and then transfer the heat to the liquid to promote the generation of supercavitation. The controller is used to control the speed of the pump, and can adjust the size of the cavitation zone. The heat sink and the water collecting tank are included in the cavitation zone to avoid the original solution from being mixed with the condensed water. After circulation, the water in the original solution is extracted, and the original solution is concentrated.

[0023] Liquid can produce water vaporization at room temperature, and the latent heat of vaporization under low pressure and room temperature is much lower than the latent heat of vaporization when heated and evaporated under normal pressure. The energy consumption of extracting water using the system of the present invention is low, energy-saving and efficient, and the structure is simple. The system of extracting water using the cavitation effect of the present invention can be used to extract pure water from a mixed liquid, increase the concentration of the mixed liquid, and can be used in the fields of seawater desalination, sewage concentration, acid (alkali) liquid concentration, and water-containing organic waste liquid concentration and reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a system for extracting water using the cavitation effect in Example 1;

[0025] Figure 2 It is a structural schematic diagram of the cavitation water extractor 4 of Example 1;

[0026] Figure 3 It is a schematic structural diagram of the bracket 4-2 of Example 1;

[0027] Figure 4 It is a schematic structural diagram of the cavitator 4-3 of Example 1;

[0028] Figure 5 It is a schematic diagram of the cavitation zone in the cavitation water extractor 4 of Example 1;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the cavitation water extractor 4 of Example 1. DETAILED DESCRIPTION

[0030] The beneficial effects of the present invention are verified by the following examples.

[0031] Embodiment 1: A method for using a system for extracting water using cavitation effect in this embodiment is performed according to the following steps:

[0032] 1. Construct a system for extracting water using the cavitation effect: The system consists of a liquid replenishment tank 1, a pump 2, a first flow meter 3, a cavitation water extractor 4, a second flow meter 5, a steam trap 6, a water storage tank 7, a controller 8, a discharge pipe 9, a pressure gauge 10, a thermometer 11 and a liquid level meter 12;

[0033] The cavitation water pump 4 is composed of a pipe shell 4-1, a bracket 4-2, a cavitator 4-3, an electronic refrigeration sheet 4-4, a heat sink 4-5, a water collecting tank 4-6 and a lead-out pipe 4-7;

[0034] The bracket 4-2 is composed of four fixing rods 4-2-1 evenly distributed on the circumference of the column 4-2-2, and a center hole 4-2-3 is set at the axis position of the column 4-2-2; the bracket 4-2 is fixedly connected to the inner wall of the pipeline shell 4-1 through the fixing rods 4-2-1;

[0035] The cavitator 4-3 is an axisymmetric conical solid structure, with a through hole 4-3-1 set at the axis position, a front end face being a plane, a groove 4-3-2 set at the rear end face, and a wire groove 4-3-3 connected to the through hole 4-3-1 set in the groove 4-3-2; the front end face of the cavitator 4-3 is connected to the column 4-2-2 of the bracket, and the axis of the cavitator 4-3 coincides with the axis of the column 4-2-2; the hot end face of the electronic cooling sheet 4-4 is bonded and embedded in the groove 4-3-2 of the cavitator 4-3 with a heat conductive adhesive, and the power supply wire of the electronic cooling sheet 4-4 passes through the wire groove 4-3 of the cavitator 4-3. -3-3, through hole 4-3-1 and the center hole 4-2-3 of bracket 4-2 are led out of the pipeline shell 4-1, and the wire groove 4-3-3, through hole 4-3-1 and the center hole 4-2-3 of bracket 4-2 of cavitator 4-3 are sealed by resin curing, which has the functions of protecting the power wire and ensuring that water passes through the conical or hemispherical surface of cavitator 4-3 to improve the cavitation effect; the cold end surface of electronic refrigeration sheet 4-4 is bonded to heat sink 4-5 with thermal conductive adhesive; water collecting tank 4-6 is arranged below heat sink 4-5, and lead-out pipe 4-7 is arranged below the side of water collecting tank 4-6;

[0036] The liquid replenishment tank 1 is connected to the liquid inlet end of the cavitation water lifter 4 through the pump 2 and the first flowmeter 3. The liquid outlet end of the cavitation water lifter 4 is connected to the pipe section between the liquid replenishment tank 1 and the pump 2. A discharge pipe 9 is also provided behind the liquid outlet end. The outlet pipe 4-7 of the cavitation water lifter 4 is connected to the water storage tank 7 through the second flowmeter 5 and the steam trap 6.

[0037] The controller 8 is connected to the pump 2, the first flow meter 3, the second flow meter 5, and the steam trap 6 through a circuit; the speed of the pump 2 and the opening and closing of the electromagnetic valve of the steam trap 6 are controlled according to the flow of the first flow meter 3 and the second flow meter 5;

[0038] The pressure gauge 10 and the thermometer 11 are arranged on the pipe section between the pump 2 and the cavitation water lifter 4; the liquid level gauge 12 is arranged on the liquid replenishment tank 1;

[0039] Second, add seawater into the replenishment tank 1, the liquid in the replenishment tank 1 is pressurized by the pump 2 and enters the cavitation water extractor 4; wherein the speed of the pump is 2970rpm, the pressure of the liquid in the pipeline is 0.4~0.5MPa, under such parameter conditions, the cavitation zone of the cavitator 4-3 contains the heat sink in the cavitation zone;

[0040] 3. In the cavitation water pump 4, due to the existence of the cavitator 4-3, the liquid flow cross-section is reduced, the liquid velocity is increased, and supercavitation occurs. The heat sink and the water collecting tank are arranged in the cavitation zone of the supercavitation. Only water vapor exists in the cavitation zone. The cooling end of the electronic refrigeration plate with a power of 300w is connected to the heat sink. The temperature of the heat sink is reduced, which will condense the water vapor in the cavitation zone into water droplets. The water droplets fall into the water collecting tank, flow out from the outlet pipe, and are discharged into the water storage tank through the steam trap to obtain pure water. All indicators are better than the national drinking water indicators and can be drunk without further treatment; and the concentrated seawater with high salt content enters the pipeline of the liquid replenishment tank 1 and the pump 2 for repeated pressurization or is discharged from the system through the discharge pipe 9.

[0041] Embodiment 2: A method for using a system for extracting water using cavitation effect in this embodiment is performed according to the following steps:

[0042] 1. Constructing a system for extracting water using the cavitation effect: This system is different from the system in Example 1 in that the cavitator 4-3 is an axisymmetric spherical solid structure, and the rest is the same as the system in step 1 of Example 1;

[0043] The system for extracting water by cavitation effect of this embodiment 2 is used to concentrate the sulfuric acid solution. The specific steps are as follows:

[0044] 2. Sulfuric acid with a mass percentage concentration of 10% is added into the replenishing tank 1. The acid in the replenishing tank 1 is pressurized by the pump 2 and enters the cavitation water extractor 4. The speed of the pump 2 is 2970 rpm.

[0045] 3. In the cavitation water extractor 4, due to the presence of the cavitator 4-3, the flow cross-section of the acid liquid is reduced. When the acid liquid speed is above 27m / s, supercavitation occurs. The heat sink and the water collecting tank are arranged in the cavitation zone of the supercavitation. Only water vapor exists in the cavitation zone. The cooling end of the electronic refrigeration plate with a power of 500w is connected to the heat sink. The temperature of the heat sink is reduced, and the water vapor in the cavitation zone will condense into water droplets. The water droplets fall into the water collecting tank, flow out from the outlet pipe, and are discharged into the water storage tank through the steam trap, while the sulfuric acid with increased concentration is discharged from the discharge pipe 9; the water storage tank of the device obtains pure fresh water, and at the same time, sulfuric acid with increased concentration can be obtained. The mass percentage concentration of the sulfuric acid after treatment reaches 50%, achieving the effect of sulfuric acid concentration.

Claims

1. A method for using a system for extracting water using cavitation effect, Features The method proceeds as follows:

1. Constructing a system for extracting water using the cavitation effect, the system comprising a liquid replenishment tank (1), a pump (2), a first flow meter (3), a cavitation water extractor (4), a second flow meter (5), a steam trap (6), a water storage tank (7) and a controller (8); The cavitation water pump (4) is composed of a pipeline shell (4-1), a bracket (4-2), a cavitator (4-3), an electronic refrigeration sheet (4-4), a heat sink (4-5), a water collection tank (4-6) and an outlet pipe (4-7); The bracket (4-2) is composed of fixing rods (4-2-1) evenly distributed on the circumferential surface of the column (4-2-2), and a center hole (4-2-3) is arranged at the axis position of the column (4-2-2); the bracket (4-2) is fixedly connected to the inner wall of the pipeline shell (4-1) through the fixing rods (4-2-1); The cavitator (4-3) is an axisymmetric conical or hemispherical solid structure, a through hole (4-3-1) is arranged at the axis position, the front end face of the cavitator (4-3) is a plane, the rear end face is arranged with a groove (4-3-2), and a wire groove (4-3-3) connected to the through hole (4-3-1) is arranged in the groove (4-3-2); the front end face of the cavitator (4-3) is connected to the column (4-2-2) of the bracket, and the axis of the cavitator (4-3) and the column (4-2-2) coincide; the hot end face of the electronic cooling plate (4-4) is embedded in the groove (4-3-2) of the cavitator (4-3), and the electronic cooling plate The power supply wire of (4-4) is led out of the pipe shell (4-1) through the wire groove (4-3-3), the through hole (4-3-1) and the central hole (4-2-3) of the bracket (4-2) of the cavitator (4-3), and the wire groove (4-3-3), the through hole (4-3-1) and the central hole (4-2-3) of the bracket (4-2) are sealed by resin curing; the cold end surface of the electronic refrigeration plate (4-4) is bonded to the heat sink (4-5); the water collecting tank (4-6) is arranged below the heat sink (4-5), and the lead-out pipe (4-7) is arranged below the side of the water collecting tank (4-6); The liquid replenishment tank (1) is connected to the liquid inlet end of the cavitation water lifter (4) via a pump (2) and a first flowmeter (3); the liquid outlet end of the cavitation water lifter (4) is connected to the pipe section between the liquid replenishment tank (1) and the pump (2); a discharge pipe (9) is also provided at the liquid outlet end; the outlet pipe (4-7) of the cavitation water lifter (4) is connected to the water storage tank (7) via a second flowmeter (5) and a steam trap (6); The controller (8) is connected to the pump (2), the first flow meter (3), the second flow meter (5), and the steam trap (6) via an electric circuit; 2. Adding a liquid-liquid mixture containing metal ions, oil or other chemical components into a liquid replenishing tank (1), the liquid in the liquid replenishing tank (1) is pressurized by a pump (2) and enters a cavitation water extractor (4); 3. In the cavitation water extractor (4), due to the presence of the cavitator (4-3), the liquid flow cross section is reduced, the liquid velocity is increased, and supercavitation occurs. The controller controls the rotation speed of the pump (2) so that the heat sink and the water collecting tank are arranged in the cavitation zone of the supercavitation. Only water vapor exists in the cavitation zone. The cooling end of the electronic refrigeration plate is connected to the heat sink. The temperature of the heat sink is reduced, which condenses the water vapor in the cavitation zone into water droplets. The water droplets fall into the water collecting tank (4-6), flow out from the lead-out pipe (4-7), and are discharged into the water storage tank (7) through the steam trap (6) to obtain pure water; and the concentrated liquid enters the pipeline between the liquid replenishment tank (1) and the pump (2) to be repeatedly pressurized or discharged from the system through the discharge pipe (9) to obtain concentrated liquid.

2. A method for using a system for extracting water using cavitation effect according to claim 1, It is characterized in that The cone shape of the cavitator (4-3) is a cone or a polygonal cone.

3. A method for using a system for extracting water using cavitation effect according to claim 1 or 2, It is characterized in that The front end surface of the cavitator (4-3) and the column (4-2-2) of the bracket are connected by bolts.

4. A method for using a system for extracting water using cavitation effect according to claim 1 or 2, It is characterized in that The hot end surface of the electronic refrigeration sheet (4-4) is bonded in the groove (4-3-2) of the cavitator (4-3) by using heat-conducting adhesive.

5. A method for using a system for extracting water using cavitation effect according to claim 1 or 2, It is characterized in that The cold end surface of the electronic refrigeration sheet (4-4) is bonded to the heat sink (4-5) using heat conductive adhesive.

6. A method for using a system for extracting water using cavitation effect according to claim 1 or 2, It is characterized in that The system for extracting water using the cavitation effect also includes a pressure gauge (10) and a thermometer (11); wherein the pressure gauge (10) and the thermometer (11) are arranged on a pipe section between the pump (2) and the cavitation water extractor (4).

7. A method for using a system for extracting water using cavitation effect according to claim 1 or 2, It is characterized in that The system for extracting water using the cavitation effect also includes a liquid level meter (12); the liquid level meter (12) is arranged on the liquid replenishment tank (1).

8. A method for using a system for extracting water using cavitation effect according to claim 1 or 2, It is characterized in that In step 2, the rotation speed of the pump (2) is 2500-3000 rpm.

9. A method for using a system for extracting water using cavitation effect according to claim 1 or 2, It is characterized in that The power of the electronic cooling chip (4-4) in step 3 is 10~500W.

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