TWI673236B - Microporous seawater desalination device capable of counter-electric cleaning - Google Patents

Abstract

The invention is a microfluidic seawater desalination device that can be cleaned with anti-electricity, and includes a shell, a first electrode, a second electrode, and a filtering device. The accommodating space formed by the shell is provided with a first electrode and a filtering device, and the filtering device The first electrode is covered to form a filter groove, and the second electrode is disposed on the inner layer of the housing, corresponding to the surface of the first electrode. The surfaces of the first electrode and the second electrode are coated with a layer of anticorrosive material to prevent long time It is eroded by water. The surface of the filter device has a filter layer. The filter layer has a plurality of micro-flow holes. When the first electrode and the second electrode are energized, the impurity ions will be attracted by the filter layer and adsorbed on the filter layer. This achieves the function of desalination of seawater.

Description

Microfluidic seawater desalination device capable of being reversely cleaned

The invention relates to a microfluidic seawater desalination device that can be cleaned with anti-electricity. In particular, a first electrode is disposed in a filter tank formed by a filtering device, and a second electrode is disposed in an inner layer of a casing, wherein the first electrode and the second electrode The surface of the electrode is plated with a layer of anticorrosive material. The surface of the filtering device has a layer of filtering layer, and the filtering layer has a plurality of micro-flow holes.

Since the issue of seawater desalination in 1950 AD, it has gradually received the attention of various countries. So far, more than 1,600 seawater desalination plants have been developed in the world, and the daily desalinated seawater has reached 6.64 million cubic meters, which is close to the daily output of the Feicui Reservoir. The amount of water (3.54 million cubic meters) is doubled, and its growth rate continues to increase.

Currently commercialized seawater desalination includes Multi-Stage Flash (MSF), Multi-Effect Distillation (MED), Vapor Compression (C), and Reverse Osmosis (C) Reverse Osmosis (referred to as RO), electrodialysis (ED), and membrane filtration (Nanofiltration (NF)) can be divided into two categories: distillation method and membrane method.

Among them, the main disadvantage of the distillation method is that it needs to consume a lot of energy, while the main disadvantage of the thin film method is that it needs to apply a large pressure to overcome the osmotic pressure of brine or seawater. Therefore, it is necessary to develop new desalination technology.

The invention mainly provides a microfluidic seawater desalination device that can be cleaned with anti-electricity, and includes a shell, a first electrode, a second electrode, and a filtering device. The shell has a receiving space, a first electrode, a second electrode, and a filter. The devices are all located in the accommodating space. The filtering device is coated on the outside of the first electrode and forms a filtering groove. The second electrode is disposed on the surface of the inner layer corresponding to the first electrode.

Preferably, the surfaces of the first electrode and the second electrode are coated with a layer of anticorrosive material to prevent water from being eroded for a long time. The surface of the filter device has a filter layer, and the filter layer has a plurality of micro-flow holes.

Preferably, the seawater is injected through a water pipe. When the first electrode and the second electrode are energized, the first electrode and the second electrode have opposite potentials, and impurity ions in the seawater are caused by the gap between the first electrode and the second electrode. In relation to the current, impurity ions will be attracted to the filter layer and adsorbed on the filter layer, thereby achieving the function of desalination of seawater.

Preferably, a lot of impurities will be accumulated after the filter layer is used for a long time, the potentials of the first electrode and the second electrode need only be reversed, and water is injected and flowed out in the reverse direction, and the impurities will be discharged.

The feature of the present invention is that, unlike the conventional seawater desalination device, the first electrode and the second electrode are respectively at two ends, and the filtering device is disposed in the middle. The design method of the present invention can further improve the efficiency and efficiency of seawater desalination. .

The following describes the embodiments of the present invention in more detail with illustrations and component symbols, so that those skilled in the art can implement them after studying this specification.

The present invention is a microfluidic seawater desalination device that can be cleaned with anti-electricity. As shown in FIG. 1, the device includes a casing 10, a first electrode 20, a second electrode 30, and a filtering device 40. The casing 10 has a housing. Space, the first electrode 20, the second electrode 30, and the filtering device 40 are all located in the accommodating space, the filtering device 40 is covered outside the first electrode 20 and forms a filtering groove, and the second electrode 30 is disposed on the first electrode 20 Corresponding inner surface of the casing 10.

Further, the surfaces of the first electrode 20 and the second electrode 30 are plated with a layer of anticorrosive material to prevent water from being eroded for a long time. The surface of the filtering device 40 has a layer of filter layer 41, and the filter layer 41 has a plurality of microfluidic holes. The device 40 is smaller than the accommodating space, and the accommodating space is not divided into two spaces that are not connected to each other.

Specifically, seawater is injected through the opening A, and the first electrode 20 and the second electrode 30 have opposite potentials when the first electrode 20 and the second electrode 30 are energized. In this embodiment, the first electrode 20 is The second electrode 30 is a positive electrode. Due to the current relationship between the first electrode 20 and the second electrode 30, seawater flows from the over-capacity space to the filter tank, and the impurity ions are attracted to the filter layer 41 and adsorbed on the filter layer 41. As a result, the impurity ions in the seawater are blocked to achieve the function of desalination of seawater, and the filtered water flows out through the opening B again.

In addition, the filtering layer 41 of the filtering device 40 will absorb a lot of impurities due to use. At this time, it is only necessary to exchange the potentials of the first electrode 20 and the second electrode 30, and reversely inject water through the opening B and then flow out through the opening A. , Impurities will be discharged into the water, and then the water can be extracted to achieve the effect of cleaning the filter layer 41.

Furthermore, the seawater desalination device of the present invention can adjust the potentials of the first electrode 20 and the second electrode 30 according to seawater of different water quality, that is, the first electrode 20 may also be a positive electrode and the second electrode 30 is a negative electrode. In this case, The bottom seawater is injected into the accommodation space through the opening B, and the filtered water flows out through the opening A.

The feature of the present invention is that, unlike the conventional seawater desalination device, the first electrode and the second electrode are respectively at two ends, and the filtering device is disposed in the middle. The design method of the present invention can further improve the efficiency and efficiency of seawater desalination. .

The above are only used to explain the preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Therefore, any modification or change related to the present invention made under the same spirit of the invention Should still be included in the scope of the present invention.

10‧‧‧Shell

20‧‧‧First electrode

30‧‧‧Second electrode

40‧‧‧filtration device

41‧‧‧Filter layer

A‧‧‧ opening

B‧‧‧ opening

FIG. 1 is a schematic diagram showing a microfluidic seawater desalination device according to the present invention;

Claims (4)

A microfluidic seawater desalination device capable of being cleaned with anti-electricity, comprising: a casing having a receiving space; a first electrode; and a second electrode disposed on a surface of the inner layer of the casing corresponding to the first electrode. And a filtering device, which is formed by covering the first electrode with a filtering groove, the filtering device has a filtering layer on the surface, and the filtering layer has a plurality of micro flow holes; wherein the seawater is injected into the filtering device through an opening; In the filter tank, when the first electrode and the second electrode are both energized, and the first electrode and the second electrode have opposite potentials, the seawater in the filter tank is attracted to the filter layer due to the current relationship, and Impurity ions in the seawater are adsorbed on the filtering layer and cannot pass through. The seawater passing through the filtering layer then flows into the accommodating space of the shell and flows out through another opening. As described in item 1 of the scope of the patent application, the microfluidic seawater desalination device capable of being cleaned with anti-electricity, wherein the surface of the first electrode and the second electrode is plated with a layer of anticorrosive material. The microfluidic seawater desalination device capable of being reversibly cleaned according to item 1 of the scope of patent application, wherein the first electrode is a positive electrode and the second electrode is a negative electrode. According to the micro-porous seawater desalination device capable of being cleaned with anti-electricity according to item 2 of the scope of patent application, the potentials of the first electrode and the second electrode are reversed, and the impurity ions adsorbed on the filter layer are discharged. The filter layer can be reused in water.