Portable seawater desalination device

Abstract

The utility model belongs to the technical field of seawater treatment, particularly relates to a portable seawater desalination device, and aims to solve the problems that in order to meet the fresh water requirement of long-term navigation, a fresh water generator is installed, the volume of the fresh water generator is large, the weight of the fresh water generator can reach more than one ton, and a distillation method adopted by the fresh water generator is that a vacuum pump is arranged to form a low-pressure environment, so that seawater is easier to evaporate. In order to solve the problems of high energy consumption and high requirements on devices in the prior art, the utility model provides the following scheme: the device comprises a frame, and a seawater tank for containing seawater is fixed at the side end of the frame; a filtering part is arranged in the frame and comprises a sand filter, a carbon filter, a softener and a precision filter, the sand filter is communicated with the carbon filter, the carbon filter is communicated with the softener, and the softener is communicated with the precision filter; solar energy is adopted as an energy supply device, no additional electric energy consumption is generated, and the effect of saving energy is achieved; the portable device is convenient and easy to carry, and the space ratio and the load of the ship can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seawater treatment, in particular to a portable seawater desalination device. Background Art

[0002] With the intensifying global energy crisis and the advent of carbon neutrality, wastewater treatment and resource utilization have become hot topics in recent years. Population growth, industrialization, and water pollution are leading to water shortages in both developing and developed countries. Increasing water supplies by extracting freshwater from a range of unconventional sources, such as seawater, brackish groundwater, and wastewater discharge, is crucial to alleviating global water stress. Currently, distillation and membrane processes are the most widely used desalination technologies. Distillation methods primarily include multi-stage flash evaporation and multi-effect distillation. Although distillation has been developed earlier, it suffers from numerous issues such as scaling, high energy consumption, and high costs. Membrane processes primarily include reverse osmosis, membrane distillation, and electrodialysis. While membrane processes offer lower energy consumption and higher desalination efficiency than distillation, they can become fouled during use, increasing operating costs. Therefore, the search for low-energy, high-efficiency, and low-cost desalination technologies is urgent.

[0003] Fresh water is particularly important for maritime transportation. Modern ships are usually equipped with fresh water tanks. For some large ships, the fresh water tanks can store hundreds of tons of fresh water, but they are limited by the space and load capacity of the ship. In order to meet the fresh water needs of long-term navigation, some ships are equipped with fresh water generators. Fresh water generators are large in size and can weigh more than one ton. The distillation method used by fresh water generators is to create a low-pressure environment by setting a vacuum pump to make seawater evaporate more easily. This method has high energy consumption and high requirements for the equipment. The process of desalinating seawater using a semipermeable membrane is reverse osmosis. The effluent produced by the first-stage reverse osmosis can usually be used for general industrial water. The second-stage reverse osmosis is further processed on the first-stage reverse osmosis, and its water desalination rate is as high as about 99%. However, this method has a larger unit. To meet the drinking water requirements, a second-stage reverse osmosis with higher energy consumption is required, resulting in high water treatment costs. Utility Model Content

[0004] The purpose of this utility model is to address the existing problem of using a freshwater generator to meet the freshwater needs of long-term voyages. Freshwater generators are large and can weigh over one ton. The distillation method used by freshwater generators uses a vacuum pump to create a low-pressure environment, allowing seawater to evaporate more easily. This method has the disadvantages of high energy consumption and high equipment requirements. The proposed portable seawater desalination device is a solution.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A portable seawater desalination device comprises a frame, wherein a seawater tank for containing seawater is fixed to a side end of the frame;

[0007] Wherein, a filtering part is provided in the frame, and the filtering part includes a sand filter, a carbon filter, a softener and a precision filter. The sand filter is connected to the carbon filter, the carbon filter is connected to the softener, and the softener is connected to the precision filter. A booster pump is fixed to the side end of the seawater tank, the water inlet of the booster pump is connected to the seawater tank, and the water outlet of the booster pump is connected to the sand filter;

[0008] A reverse osmosis device is fixed in the frame, and the reverse osmosis device is used to perform primary desalination on the pretreated seawater;

[0009] An FCDI device is fixed in a frame and includes ten FCDI zones in series, for desalinating the seawater after the first desalination stage.

[0010] An electrolytic disinfection box is fixed in the frame, and the electrolytic disinfection box is used to electrolytically disinfect the desalinated seawater. A pure water tank is also fixed in the frame to store pure water.

[0011] A power supply component is arranged in the frame for supplying electric energy.

[0012] In a possible design, a high-pressure pump is fixed in the frame, a water inlet of the high-pressure pump is connected to a precision filter, and a water outlet of the high-pressure pump is connected to a reverse osmosis device.

[0013] In one possible design, the reverse osmosis equipment is provided with a concentrated brine outlet and a desalinated water outlet, a concentrated brine tank for placing concentrated brine is fixed in the frame, a first water pump is fixed in the frame, the water inlet of the first water pump is connected to the concentrated brine outlet of the reverse osmosis equipment, the water outlet of the first water pump is connected to the concentrated brine tank, the concentrated brine tank is connected to the electrolysis disinfection tank for providing electrolyte solution to the electrolysis disinfection tank, a second water pump is provided in the frame, the water inlet of the second water pump is connected to the desalinated water outlet of the reverse osmosis equipment, the water outlet of the second water pump is connected to the FCDI equipment, a third water pump is fixed in the frame, the water inlet of the third water pump is connected to the electrolysis disinfection tank, and the water outlet of the third water pump is connected to the pure water tank.

[0014] In one possible design, a solar panel is fixed to the top of the frame, and an energy storage box electrically connected to the solar panel is fixed inside the frame. The energy storage box is electrically connected to the first water pump, the second water pump, the third water pump, the booster pump, the high-pressure pump, the reverse osmosis equipment, the electrolysis disinfection box and the FCDI equipment respectively.

[0015] In a possible design, the energy storage tank is made of a lead-acid battery.

[0016] In one possible design, the frame is made of stainless steel.

[0017] In this application, the seawater in the seawater tank is sent to the sand filter by a booster pump for primary filtration, then sent to the carbon filter for secondary filtration through the sand filter, sent to the softener for umbrella filtration through the carbon filter, sent to the precision filter for quadruple filtration through the softener, and then sent to the reverse osmosis equipment through the precision filter for reverse osmosis, and desalinated through the reverse osmosis membrane. Then it enters the FCDI equipment, and after ten stages of FCDI zones in series, under the action of the electric field, anions and cations enter the adsorption zone through the ion exchange membrane and are adsorbed and desalinated by the mobile electrode. After entering the electrolysis disinfection box, it can meet the drinking water standard and then enter the pure water tank for use by the crew. The mobile electrode after adsorption in the FCDI enters the desorption zone for desorption, realizing the recycling and reuse of the electrode. The concentrated brine produced by the reverse osmosis equipment enters the electrolysis disinfection box to provide it with electrolytes. Electrolysis produces sodium hypochlorite to disinfect the desalinated seawater. Sunlight shines on the solar panel, converting light energy into electrical energy. The excess electrical energy is stored in the energy storage box for use at night or on cloudy days. A rough calculation shows that this device can desalinate 36L of water per day.

[0018] Beneficial effects: In the present invention, the entire device is powered by solar panels, which can effectively realize the desalination and recycling of seawater, so as to solve the current problems such as high energy consumption of water generators on ships. The experiment uses magnetic modification to prepare magnetic activated carbon and make mobile electrodes to improve the conductivity and desalination performance of the FCDI device. FCDI is coupled with reverse osmosis to desalinate seawater. The desalinated water can meet the drinking water standard after disinfection in the electrolysis area, and then enters the water storage tank for use by the crew. The mobile electrode adsorbed in the FCDI enters the desorption area for desorption, realizing the recycling and reuse of the electrode. The concentrated brine produced by the reverse osmosis device enters the electrolysis area to provide it with electrolytes, and the sodium hypochlorite produced by electrolysis is used to disinfect the desalinated seawater, so that the fresh water can reach the best drinking water standards. The entire device is driven by solar energy and realizes seawater desalination through the coordinated efforts of reverse osmosis, mobile capacitor deionization technology and electrolytic disinfection. An energy-saving and emission-reduction benefit analysis of the entire system reveals that it is a system with extremely high functional value: the mobile capacitive deionization device uses magnetic activated carbon as the mobile electrode, which is low-cost and can achieve low-energy, high-performance adsorption of seawater; the mobile electrode circulates between ten stages of FCDI devices in series, and is regenerated through magnetic field and electrode reverse desorption, further reducing treatment costs; solar energy is used as the power supply device, eliminating external electricity consumption and achieving energy conservation; the portable device is convenient and easy to carry, which can reduce the space occupied and load of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front perspective view of the portable seawater desalination device proposed in the utility model;

[0020] Figure 2 This is a partial exploded view of the portable seawater desalination device proposed in the utility model;

[0021] Figure 3 This is a flow chart of the use of the portable seawater desalination device proposed in this utility model.

[0022] In the figure: 1. Frame; 2. Seawater tank; 3. Pure water tank; 4. Brine tank; 5. Solar panel; 6. Reverse osmosis equipment; 7. Electrolysis disinfection tank; 8. FCDI equipment; 9. Booster pump; 10. Sand filter; 11. High-pressure pump; 12. Carbon filter; 13. Softener; 14. Precision filter; 15. Energy storage tank. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Example 1: Reference Figure 1-Figure 2 , a portable seawater desalination device, which is used in the field of seawater treatment technology, comprises a frame 1, and a seawater tank 2 for holding seawater is fixed to the side end of the frame 1. A filtering part is provided in the frame 1, and the filtering part includes a sand filter 10, a carbon filter 12, a softener 13 and a precision filter 14 in sequence. These filters are connected in sequence to form a complete pretreatment process. A booster pump 9 is fixed to the side end of the seawater tank 2, and the water inlet of the booster pump 9 is connected to the seawater tank 2, and the water outlet is connected to the inlet of the sand filter 10 through a pipeline. In this way, the booster pump 9 can pressurize the seawater in the seawater tank 2 and send it into the sand filter 10 for preliminary filtration.

[0025] Also secured within frame 1 is a reverse osmosis unit 6, which performs primary desalination on pretreated seawater. To ensure smooth entry of seawater into reverse osmosis unit 6, a high-pressure pump 11 is installed after precision filter 14. The pump's inlet is connected to the outlet of precision filter 14, while its outlet is connected to the inlet of reverse osmosis unit 6. This allows the pump 11 to pressurize the pretreated seawater to the required operating pressure of reverse osmosis unit 6.

[0026] The reverse osmosis unit 6 is equipped with a brine outlet and a desalinated water outlet. To collect the brine, a brine tank 4 is fixed within the frame 1. A first water pump delivers the brine produced by the reverse osmosis unit 6 to the brine tank 4 for storage. Furthermore, to deliver the desalinated water to the subsequent desalination equipment, a second water pump is provided. Its inlet is connected to the desalinated water outlet of the reverse osmosis unit 6, and its outlet is connected to the inlet of the FCDI unit 8. The FCDI unit 8 includes ten FCDI stages connected in series, which are used to further desalinate the seawater after the first stage of desalination.

[0027] Desalinated water requires electrolytic disinfection to ensure its safety. Therefore, this device incorporates an electrolytic disinfection tank 7 within the frame 1. A third water pump delivers water treated by the FCDI device 8 into the electrolytic disinfection tank 7 for electrolytic disinfection. The disinfected water is then piped into the pure water tank 3 for storage.

[0028] Example 2: Reference Figure 1-Figure 3 This embodiment is improved upon Example 1: Furthermore, the present device includes a power supply assembly, located within the frame 1, for providing electrical energy to the entire device. In a specific implementation, a solar panel 5 is secured to the top of the frame 1, and an energy storage tank 15, electrically connected to the solar panel 5, is secured within the frame 1. The energy storage tank 15 is electrically connected to the first water pump, the second water pump, the third water pump, the booster pump 9, the high-pressure pump 11, the reverse osmosis device 6, the electrolytic disinfection tank 7, and the FCDI device 8, respectively, to provide electrical energy to these components. This allows the present device to operate using solar energy, significantly reducing energy consumption and operating costs.

[0029] In specific implementation, the energy storage box 15 can be made of lead-acid batteries or other types of batteries. In order to ensure the safety and stability of the battery, the device can also be equipped with a battery management system (BMS) to monitor and manage the energy storage box 15.

[0030] However, as is well known to those skilled in the art, the working principles and wiring methods of the solar panels 5, the energy storage box 15, the first water pump, the second water pump, the third water pump, the booster pump 9, the high-pressure pump 11, the reverse osmosis equipment 6, and the electrolytic disinfection box 7 are commonplace, and they are all conventional means or common knowledge, so they will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A portable seawater desalination device, characterized in that: include: A frame (1), wherein a seawater tank (2) for containing seawater is fixed to a side end of the frame (1); The frame (1) is provided with a filter portion, the filter portion comprising a sand filter (10), a carbon filter (12), a softener (13) and a precision filter (14), the sand filter (10) and the carbon filter (12) are connected, the carbon filter (12) and the softener (13) are connected, the softener (13) and the precision filter (14) are connected, a booster pump (9) is fixed to the side end of the seawater tank (2), the water inlet of the booster pump (9) is connected to the seawater tank (2), and the water outlet of the booster pump (9) is connected to the sand filter (10); A reverse osmosis device (6) is fixed in the frame (1), and the reverse osmosis device (6) is used to perform primary desalination on the pretreated seawater; An FCDI device (8), wherein the FCDI device (8) is fixed in the frame (1), and wherein the FCDI device (8) is provided with ten-stage series-connected FCDI zones, and wherein the ten-stage series-connected FCDI zones are used to desalinate the seawater after the first-stage desalination; An electrolytic disinfection box (7) is fixed in the frame (1), and the electrolytic disinfection box (7) is used to electrolytically disinfect the desalinated seawater. A pure water tank (3) is provided in the frame (1) for storing pure water. A power supply component is provided in the frame (1) for supplying electric energy.

2. The portable seawater desalination device according to claim 1, characterized in that: A high-pressure pump (11) is fixed in the frame (1), a water inlet of the high-pressure pump (11) is connected to a precision filter (14), and a water outlet of the high-pressure pump (11) is connected to a reverse osmosis device (6).

3. The portable seawater desalination device according to claim 2, characterized in that: The reverse osmosis device (6) is provided with a concentrated brine outlet and a desalinated water outlet, a concentrated brine tank (4) for placing concentrated brine is fixed in the frame (1), a first water pump is fixed in the frame (1), a water inlet of the first water pump is connected to the concentrated brine outlet of the reverse osmosis device (6), a water outlet of the first water pump is connected to the concentrated brine tank (4), the concentrated brine tank (4) is connected to the electrolytic disinfection tank (7) for providing an electrolyte solution to the electrolytic disinfection tank (7), a second water pump is provided in the frame (1), a water inlet of the second water pump is connected to the desalinated water outlet of the reverse osmosis device (6), a water outlet of the second water pump is connected to the FCDI device (8), a third water pump is fixed in the frame (1), a water inlet of the third water pump is connected to the electrolytic disinfection tank (7), and a water outlet of the third water pump is connected to the pure water tank (3).

4. The portable seawater desalination device according to claim 3, characterized in that: A solar panel (5) is fixed on the top of the frame (1), and an energy storage box (15) electrically connected to the solar panel (5) is fixed inside the frame (1). The energy storage box (15) is electrically connected to the first water pump, the second water pump, the third water pump, the booster pump (9), the high-pressure pump (11), the reverse osmosis equipment (6), the electrolytic disinfection box (7) and the FCDI equipment (8).

5. The portable seawater desalination device according to claim 4, characterized in that: The energy storage box (15) is made of a lead-acid battery.

6. The portable seawater desalination device according to claim 1, characterized in that: The frame (1) is made of stainless steel.

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