Portable electro-catalysis water purifier based on titanium-based hollow fiber membrane

Abstract

The invention discloses a portable electro-catalysis water purifier based on a titanium-based hollow fiber membrane, and belongs to the field of water purifiers. The water purifier comprises a shell and a shell cover, and a pre-filtering device, an electro-catalysis membrane assembly, a water storage tank and a manual suction pump are arranged in the shell. The cluster type titanium-based hollow fiber catalytic membrane assembly is adopted as a core component and is combined with the PP filter element and the activated carbon filter element, the functions of filtration and oxidation are achieved, most soluble organic matter can be removed, germs can be killed, membrane pollution can be effectively relieved, and the structure is convenient to clean, easy to operate and quite suitable for outdoor operation.

Description

Technical Field

[0001] The present invention belongs to the field of water purifiers, and in particular relates to a portable electrocatalytic water purifier based on a titanium-based hollow fiber membrane. Background Art

[0002] During field operations or travel, especially when operating alone, safe drinking water is often unavailable. Portable water purifiers (also known as "individual water purifiers") are primarily used to purify contaminated water sources (such as surface water and groundwater) outdoors or in the wild, converting them into drinking water that meets relevant hygiene standards, ensuring safe drinking water.

[0003] The core component of current portable water purifiers is typically an ultrafiltration membrane, which effectively removes impurities such as suspended matter, colloids, microorganisms, and large organic molecules from water. However, it is less effective at removing small organic pollutants and heavy metal ions. Nanofiltration and reverse osmosis membranes can effectively intercept small organic pollutants and most heavy metal ions, but their high operating pressures make them unsuitable for single-person field operations. Furthermore, these membrane separation processes primarily rely on physical retention and are ineffective at killing pathogens. Furthermore, as treatment time increases, trapped pollutants and pathogens gradually accumulate on the membrane surface, causing membrane fouling and impacting the system's treatment capacity and effluent quality.

[0004] Electrocatalytic membrane technology combines the advantages of electrochemical catalytic oxidation and traditional membrane separation technologies to achieve highly efficient removal of target pollutants. The titanium-based hollow fiber electrocatalytic membranes (ZLCN 115970516 A, ZLCN113546526A) previously developed by the research team have demonstrated that the coupling of membrane-electrode integration, through electrocatalysis, enables the membrane to perform advanced oxidation and deep purification functions. The membrane generates highly oxidizing free radicals on the surface that react rapidly with pollutants, effectively intercepting small-molecule organic pollutants and most heavy metal ions. Furthermore, it combines multiple functions, such as physical barrier and electrochemical sterilization, offering significant advantages in the treatment of slightly polluted water. Summary of the Invention

[0005] The present invention provides a portable electrocatalytic water purifier based on titanium-based hollow fiber membranes. This device boasts advantages such as portability, low operating pressure, and excellent purification performance. It can directly convert raw water from the field into drinking water that meets standards, making it suitable for use in outdoor tourism, field operations, military exercises, and flood control and disaster relief. This device addresses the current problem of core components in portable water purifiers being poorly effective in removing small molecule organic pollutants and heavy metal ions.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solutions: a portable electrocatalytic water purifier based on a titanium-based hollow fiber membrane, comprising: a housing and a housing cover, wherein a pre-filtration device, an electrocatalytic membrane assembly, a water storage tank, and a manual suction pump are disposed inside the housing, wherein the filtration device, the electrocatalytic membrane assembly, the water storage tank, and the manual suction pump are connected in sequence;

[0007] The pre-filter device includes a PP filter element and an activated carbon filter element. The PP filter element is arranged at the water inlet and is connected to the water inlet. The activated carbon filter element is arranged downstream thereof.

[0008] The electrocatalytic membrane assembly is arranged downstream of the pre-filtration device, and includes a clustered titanium-based hollow fiber membrane and a titanium mesh, wherein the clustered titanium-based hollow fiber membrane serves as an anode and the titanium mesh serves as a cathode, and the clustered titanium-based hollow fiber membrane (anode) and the titanium mesh (cathode) are connected to a power supply;

[0009] The water storage tank is located downstream of the electrocatalytic membrane assembly;

[0010] The main shell cover is provided with a water inlet and a water outlet, and the water inlet is connected to the PP filter element.

[0011] Furthermore, raw water flows in from the water inlet through the action of the suction pump and reaches the water inlet end of the PP filter element; the water purified by the PP filter element is collected at the water inlet end of the activated carbon filter element and then reaches the main shell after purification.

[0012] Furthermore, the raw water after being filtered by the filter element enters the internal pores from the surface of the hollow fiber membrane under the action of the suction pump, and effectively removes dissolved organic matter and inactivates pathogens under the dual effects of electrochemical oxidation and membrane filtration.

[0013] Furthermore, the power supply provides a stable electric field for the electrocatalytic membrane assembly.

[0014] Furthermore, the electrocatalytic membrane assembly is a clustered type, primarily comprising multiple parallel titanium-based hollow fiber membranes and a titanium mesh counter electrode surrounding the assembly. The clustered titanium-based hollow fiber membranes and the titanium mesh counter electrode are located at the bottom of the membrane assembly and are equipped with positive and negative terminal blocks, which are connected to the positive and negative poles of a power source, respectively.

[0015] Furthermore, the titanium-based hollow fiber membrane is a single-channel or multi-channel titanium-based hollow fiber catalytic membrane, and the inner diameter of the hollow fiber membrane is 0.1-4.0 mm, the outer diameter is 0.2-5.0 mm, the length is 5-30 cm, and the average pore size is 0.1-5 μm.

[0016] Furthermore, the pore size of the PP filter element is 1-5 μm, preferably 3 μm, and the pore size of the activated carbon filter element is 1-5 μm, preferably 5 μm.

[0017] Furthermore, the titanium-based hollow fiber membrane is a titanium-based hollow fiber membrane with an outer layer loaded with an electrocatalytic layer. The catalyst in the electrocatalytic layer includes a composite of one or more metals and metal oxides such as platinum, iridium oxide, ruthenium oxide, and titanium dioxide, with a loading of (0.01%-10%). The preparation method thereof is prior art in the art, such as CN 115970516A and CN 113546526A.

[0018] Furthermore, the preparation method of the titanium-based hollow fiber catalytic membrane includes an electrodeposition method, a sol-gel method, a hydrothermal method, and the like.

[0019] Furthermore, the water purifier is also provided with a TDS sensor (total dissolved solids) and a pressure sensor. The TDS (total dissolved solids) is used to detect the water quality and monitor the total amount of dissolved solids in the device. The pressure sensor is used to monitor the pressure in the device, that is, to monitor the pressure difference of the membrane assembly.

[0020] Furthermore, the TDS (total dissolved solids) sensor is located on the outlet pipe side, between the membrane assembly and the outlet tank; the pressure sensor is located between the suction pump and the membrane assembly.

[0021] Furthermore, the manual suction pump is located on one side of the portable water purifier and includes a piston cylinder and a piston rod. The piston cylinder and the piston rod are movably connected. By pulling the piston rod, negative pressure is provided to the system, thereby sucking water from the water inlet into the water purifier.

[0022] Furthermore, the manual suction pump is located on the right side of the water tank and can provide driving force for the system by pulling the piston rod.

[0023] Furthermore, the water storage tank is located on the right side inside the water purifier.

[0024] Furthermore, the water purifier is also provided with a solar cell panel located outside the shell, which is used to charge the power supply or directly provide electricity to the electrocatalytic membrane assembly when there is sunlight in the wild.

[0025] Furthermore, the main material of the solar cell panel is monocrystalline silicon or polycrystalline silicon wafer.

[0026] The water treatment process of the portable water purifier comprises the following steps:

[0027] The source water flows into the water purifier from the water inlet under the action of a manual suction pump, and first passes through a PP filter element to remove large particles of impurities; then it passes through an activated carbon filter element to remove some pollutants, including heavy metal ions and organic matter; the double-filtered water then flows through the electrocatalytic membrane assembly, where it is deeply purified under the dual action of electrochemical oxidation and membrane filtration to remove remaining dissolved organic matter, heavy metal ions and microorganisms; finally, the treated water flows from the electrocatalytic membrane assembly into the water storage tank for storage, making it convenient for direct drinking.

[0028] Furthermore, during the water treatment process, the pressure range provided by the manual suction pump is 0 to 5.0 bar; the effective voltage intensity of the electrocatalytic membrane assembly is 1.0-10.0 V; the function of the pressure sensor is to monitor the transmembrane pressure value of the membrane assembly. If the pressure value monitored during operation is higher than 2.0 bar for a long time, the membrane assembly needs to be cleaned or replaced; the TDS sensor is used to detect the quality of the effluent water. When the TDS value of the effluent water is detected to be higher than the drinking water standard, the catalytic membrane assembly needs to be regenerated or replaced; the effective service life of the PP filter element is 1-6 months, and the effective service life of the activated carbon filter element is 2-6 months. Regular monitoring is required to determine whether it needs to be replaced.

[0029] Furthermore, the regeneration treatment method of the catalytic membrane assembly is backwashing; during the backwashing, the voltage intensity in the system is 1 to 10V, the backwashing time is 7 to 10 minutes, and the interval time is 1 to 5 hours.

[0030] Furthermore, the water source mainly includes: river water, lake water, swamp water, underground cave water, spring water, etc. The water purifier is a small water supply device that processes water from the source into drinking water that meets relevant health standards, and can have the dual functions of water storage and purification;

[0031] Furthermore, the portable water purifier can be used in fields such as outdoor tourism, field operations, military exercises, and flood control and disaster relief.

[0032] The present invention adopts a clustered titanium-based hollow fiber catalytic membrane assembly as the core component, and combines it with a PP filter element and an activated carbon filter element to form a portable electrocatalytic water purifier. The catalytic membrane assembly of the water purifier has both filtering and oxidizing functions, which can remove most soluble organic matter, kill bacteria, and effectively alleviate membrane pollution. At the same time, the hollow fiber structure of the catalytic membrane gives it a large effective area in a smaller volume, so the overall volume of the water treatment device is small and easy to carry. In addition, since the catalytic membrane is a microfiltration membrane, the required operating pressure is low and can be operated manually, which is very suitable for use in the field. The structure itself is easy to clean and simple to operate.

[0033] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and do not limit the present invention. Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the external structure of a portable electrocatalytic water purifier.

[0035] Figure 2 Schematic diagram of the internal structure of a portable electrocatalytic water purifier.

[0036] Figure 3 This is a diagram of the clustered membrane assembly in a portable electrocatalytic water purifier.

[0037] Figure 4 Schematic diagram of single-channel and three-channel hollow fiber membranes in clustered membrane modules.

[0038] Description of reference numerals:

[0039] 1-shell cover, 101-water inlet, 102-water outlet;

[0040] 2-housing, 201-PP filter element, 202-activated carbon filter element, 203-clustered membrane assembly, 204-TDS sensor, 205-pressure sensor, 206-single-channel hollow fiber membrane, 207-negative terminal, 208-positive terminal;

[0041] 3-piston cylinder, 301-piston rod;

[0042] 4- Power supply;

[0043] 5- Solar panels;

[0044] 6-Titanium mesh;

[0045] 7-Water storage tank. DETAILED DESCRIPTION

[0046] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail, and described is explanation of the present invention rather than limitation.In description of the present invention, it should be noted that, in the embodiment, those not indicating specific conditions, carry out according to the condition of normal condition or manufacturer's suggestion. Reagents used or instrument not indicating manufacturer, all are conventional products that can be purchased and obtained by commercially available.

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.

[0048] Example 1

[0049] like Figure 1-4As shown, a portable electrocatalytic water purifier based on titanium-based hollow fiber catalytic membrane, the portable water purifier comprises: a housing 2 and a housing cover 1, wherein a pre-filtering device, an electrocatalytic membrane assembly, a water storage tank 7, and a manual suction pump are arranged inside the housing 2, wherein the pre-filtering device, the electrocatalytic membrane assembly, the water storage tank 7, and the manual suction pump are connected in sequence; the pre-filtering device comprises a PP filter element 201 and an activated carbon filter element 202, wherein the PP filter element 201 is arranged at the water inlet 101, the PP filter element 201 is connected to the water inlet 101, and the activated carbon filter element 202 is connected to the water inlet 101. The filter element 202 is disposed downstream thereof; the electrocatalytic membrane assembly, disposed downstream of the pre-filtration device, comprises a clustered titanium-based hollow fiber membrane 203 and a titanium mesh 6, wherein the clustered titanium-based hollow fiber membrane 203 serves as an anode and the titanium mesh 6 serves as a cathode. The clustered titanium-based hollow fiber membrane (anode) 203 and the titanium mesh 6 are connected to a power source; the water storage tank 7 is located downstream of the electrocatalytic membrane assembly; the main housing cover 1 is provided with a water inlet 101 and a water outlet 102, wherein the water inlet 101 is connected to the PP filter element 201. The clustered titanium-based hollow fiber membrane 203 is a three-channel hollow fiber membrane, comprising three parallel titanium-based hollow fiber membranes, with a titanium mesh 6 surrounding the outside of the three parallel titanium-based hollow fiber membranes. The clustered titanium-based hollow fiber membrane 203 and the titanium mesh 6 electrodes in the membrane assembly are located at the bottom of the membrane assembly and are provided with positive and negative terminal blocks, which are connected to the positive and negative poles of the power source, respectively. The titanium-based hollow fiber membrane is an asymmetric titanium-based hollow fiber catalytic membrane with an inner diameter of 1.1 μm and an outer diameter of 1.3 μm, and includes a titanium suboxide catalytic layer. The asymmetric titanium-based hollow fiber catalytic membrane with a titanium suboxide catalytic layer is prepared by mixing titanium trichloride and hydrochloric acid in a volume ratio of 1:2, adjusting the pH to 4, and depositing TiO2 on the surface of the titanium-based hollow fiber membrane at -1.0 V using a titanium-based hollow fiber membrane with an average pore size of 3 μm as the working electrode, a titanium plate as the counter electrode, and a saturated calomel electrode as the reference electrode. The membrane is then placed in a muffle furnace and treated in a hydrogen atmosphere at 800°C for 6 hours to obtain the titanium-based hollow fiber catalytic membrane. The water purifier is also equipped with a TDS sensor 204 and a pressure sensor 205. The TDS sensor 204 is located on the outlet pipe side, between the membrane assembly and the outlet tank 7; the pressure sensor 205 is located between the suction pump and the membrane assembly. The manual suction pump is located on one side of the portable water purifier and includes two parts: a piston cylinder 3 and a piston rod 301. The piston cylinder 3 and the piston rod 301 are movably connected. By pulling the piston rod 301, negative pressure can be provided for the system, and the water source water can be sucked into the water purifier from the water inlet 101. The manual suction pump is located on the right side of the water storage tank 7 and driving force can be provided for the system by pulling the piston rod 301. The water storage tank 7 is located on the right side inside the water purifier. The water purifier is also provided with a solar panel 5, which is located on the outside of the shell 2, and is used to charge the power supply or directly provide electricity to the electrocatalytic membrane assembly when there is sunlight in the wild. The main material of the solar panel 2 is monocrystalline silicon wafers.The PP filter element 201 (3 μm), the activated carbon filter element 202 (5 μm), the manual suction pump 3, the TDS sensor 204, the pressure sensor 205, the power supply 4 and the solar panel 5 were all purchased from commercial channels.

[0050] The specific operating process is as follows: River water flows into the water purifier from water inlet 101 under the action of a manual suction pump 3. It first passes through PP filter element 201 and activated carbon filter element 202, and then flows through electrocatalytic membrane assembly 203 (voltage intensity 3V). Under the dual action of electrochemical oxidation and membrane filtration, the water is deeply purified. The purified water flows to the outlet pipe under the action of suction pump 3 (pressure 0.4MPa) and is stored in water storage tank 7. When it is ready for drinking, it flows out of water outlet 102, resulting in treated clean water. Testing shows that the TDS content in the water is 233mg / L, the COD content is 1mg / L, and there is no significant suspended matter, which meets national drinking water standards. After treating 15L of water, the transmembrane pressure difference increases rapidly, and the water flux decreases significantly.

[0051] Comparative Example 1

[0052] A filter element water purifier differs from Example 1 in that it does not have an electrocatalytic membrane assembly, that is, no electrocatalytic membrane assembly is provided between the activated carbon filter element 202 and the water storage tank 7 .

[0053] The specific operating process is as follows: River water is first drawn into the water purifier through water inlet 101 via suction pump 3. It is then filtered through PP filter element 201 and activated carbon filter element 202. The purified water then flows to the outlet pipe under the action of suction pump 3 and is stored in water storage tank 7. It is then discharged from outlet 102 for drinking. The dual filtration of the PP filter element and activated carbon filter element removes large particles and some soluble pollutants from the river water. Testing revealed a TDS content of 318 mg / L and a COD content of 6 mg / L, with no significant suspended matter.

[0054] Comparative Example 2

[0055] A portable electrocatalytic water purifier with a single-channel titanium-based hollow fiber catalytic membrane differs from Example 1 in that the electrocatalytic membrane assembly is a single-channel hollow fiber membrane 206, that is, a single titanium-based hollow fiber membrane, and a titanium mesh 6 surrounds the outside of the single titanium-based hollow fiber membrane; at the same time, there is no pre-filtration device, that is, no pre-filtration device is set between the electrocatalytic membrane assembly and the water inlet 101.

[0056] The specific operating process is as follows: River water is first drawn into the water purifier through the water inlet 101 by the suction pump 3, directly reaching the electrocatalytic membrane assembly 203 (voltage intensity 3V). The purified water flows to the outlet pipe under the action of the suction pump 3 (pressure 0.4MPa), and is stored in the water storage tank 7. It flows out of the water outlet 102 for drinking. The filtration and electrocatalytic oxidation of the membrane assembly remove organic pollutants and effectively inactivate pathogens. The TDS content of the water was tested to be 292mg / L, the COD content was 3mg / L, and there was no significant suspended matter. After treating 4L of water, the transmembrane pressure increased rapidly, and the water flux decreased significantly.

[0057] Example 2

[0058] like Figure 1-4As shown, a portable electrocatalytic water purifier based on titanium-based hollow fiber catalytic membrane, the portable water purifier comprises: a housing 2 and a housing cover 1, wherein a pre-filtering device, an electrocatalytic membrane assembly, a water storage tank 7, and a manual suction pump are arranged inside the housing 2, wherein the pre-filtering device, the electrocatalytic membrane assembly, the water storage tank 7, and the manual suction pump are connected in sequence; the pre-filtering device comprises a PP filter element 201 and an activated carbon filter element 202, wherein the PP filter element 201 is arranged at the water inlet 101, the PP filter element 201 is connected to the water inlet 101, and the activated carbon filter element 202 is connected to the water inlet 101. The filter element 202 is disposed downstream thereof; the electrocatalytic membrane assembly, disposed downstream of the pre-filtration device, comprises a clustered titanium-based hollow fiber membrane 203 and a titanium mesh 6, wherein the clustered titanium-based hollow fiber membrane 203 serves as an anode and the titanium mesh 6 serves as a cathode. The clustered titanium-based hollow fiber membrane (anode) 203 and the titanium mesh 6 (cathode) are connected to a power source; the water storage tank 7 is located downstream of the electrocatalytic membrane assembly; the main housing cover 1 is provided with a water inlet 101 and a water outlet 102, wherein the water inlet 101 is connected to the PP filter element 201. The clustered titanium-based hollow fiber membrane 203 is a three-channel hollow fiber membrane, comprising three parallel titanium-based hollow fiber membranes, with a titanium mesh 6 surrounding the outside of the three parallel titanium-based hollow fiber membranes. The clustered titanium-based hollow fiber membrane and the titanium mesh 6 electrodes in the membrane assembly are located at the bottom of the membrane assembly and are provided with positive and negative terminal posts, which are connected to the positive and negative poles of the power source, respectively. The titanium-based hollow fiber membrane comprises an asymmetric titanium hollow fiber catalytic membrane assembly with an inner diameter of 0.9 μm and an outer diameter of 1.2 μm, each bearing a platinum catalytic layer. The asymmetric titanium hollow fiber catalytic membrane assembly with the platinum catalytic layer is prepared by dissolving 0.21 g of H₂PtCl₂ and 2.1 g of soluble starch in a mass ratio of 1:10 in 100 mL of deionized water at 90°C. 0.15 g of Tween 20 is then added dropwise as a surfactant, followed by stirring to form a sol. The sol is then coated on the surface of the titanium-based hollow fiber membrane, dried at 80°C for 12 hours to obtain a xerogel, which is then heat-treated at 600°C for 5 hours under an argon atmosphere. After cooling, the asymmetric titanium hollow fiber catalytic membrane bearing the platinum catalytic layer is obtained. The water purifier is also equipped with a TDS sensor 204 and a pressure sensor 205. The TDS sensor 204 is located on the outlet pipe side, between the membrane assembly and the outlet tank 7; the pressure sensor 205 is located between the suction pump and the membrane assembly. The manual suction pump is located on one side of the portable water purifier and includes two parts: a piston cylinder 3 and a piston rod 301. The piston cylinder 3 and the piston rod 301 are movably connected. By pulling the piston rod 301, negative pressure can be provided for the system, and water from the source can be sucked into the water purifier from the water inlet. The manual suction pump is located on the right side of the water storage tank 7 and driving force can be provided for the system by pulling the piston rod 301. The water storage tank 7 is located on the right side of the water purifier. The water purifier is also provided with a solar panel 5, which is located on the outside of the shell 2, and is used to charge the power supply or directly provide electricity to the electrocatalytic membrane assembly when there is sunlight in the wild. The main material of the solar panel 2 is monocrystalline silicon wafers.The PP filter element 201 (3 μm), the activated carbon filter element 202 (5 μm), the manual suction pump 3, the TDS sensor 204, the pressure sensor 205, the power supply 4 and the solar panel 5 were all purchased from commercial channels.

[0059] The specific operation method is: lake water flows into the water purifier from the water inlet 101 under the action of the manual suction pump 3 (0.4Mpa), first passes through the PP filter element 201 and the activated carbon filter element 202, and then the water flows through the electrocatalytic membrane assembly 203 (3V), and is deeply purified under the dual action of electrochemical oxidation and membrane filtration. The purified water flows to the outlet pipe under the action of the suction pump 3 and is stored in the water storage tank 7. When drinking, it flows out from the water outlet 102 to obtain treated clean water. The TDS content in the water is tested to be 274mg / L, the COD content is 0.9mg / L, and there is no obvious suspended matter, which meets the national drinking water standards. After treating 14L of water, the transmembrane pressure difference increases significantly and the water flux decreases significantly.

[0060] Comparative Example 3

[0061] A portable electrocatalytic water purifier with a single-channel titanium-based hollow fiber catalytic membrane differs from Example 2 in that: the electrocatalytic membrane assembly is a single-channel hollow fiber membrane 206, that is, a single titanium-based hollow fiber membrane, and a titanium mesh 6 surrounds the outside of the single titanium-based hollow fiber membrane; at the same time, there is no pre-filtration device, that is, no pre-filtration device is set between the electrocatalytic membrane assembly and the water inlet 101.

[0062] The specific operating method is as follows: Lake water is first drawn into the water purifier through the water inlet 101 using a suction pump 3, directly reaching the electrocatalytic membrane assembly 203 (voltage intensity 3V). Purified water, driven by the suction pump 3 (0.4 MPa), flows to the outlet pipe and is stored in the water storage tank 7. It is then discharged from the water outlet 102 for drinking. The membrane assembly's filtration and electrocatalytic oxidation remove organic pollutants and inactivate pathogens. Testing revealed a TDS content of 301 mg / L and a COD content of 2.4 mg / L, with no significant suspended matter. After treating 4 L of water, the transmembrane pressure increased rapidly, while the water flux decreased significantly.

[0063] When the portable water purifier is used outdoors, the solar panel can be used to charge the battery pack, thereby maintaining a long battery life. When the battery pack is exhausted, the cover can be opened, the battery pack can be removed from the power supply slot, and a spare battery pack can be replaced, thereby ensuring the long-term use of the portable outdoor water purifier.

[0064] The present invention monitors the dissolved solids and pressure in the water purifier through a TDS sensor and a pressure sensor, so as to replace the filter element and regenerate or replace the catalytic membrane in time to ensure the water quality of the outlet water.

[0065] In the above examples and comparative examples, Examples 1 and 2 effectively removed large impurities, dissolved organic pollutants, and heavy metal ions from raw water, and also achieved efficient pathogen inactivation. Furthermore, due to the protection of the pretreatment device, the effective service life of the catalytic membrane assembly was significantly extended, and the effluent water quality was high. Comparative Example 1 only removed large impurities and some pollutants from raw water, failing to achieve deep treatment of the raw water. While Comparative Examples 2 and 3 effectively removed dissolved organic pollutants and inactivated pathogens, the lack of pretreatment by the filtration device made the membrane assembly susceptible to contamination, requiring frequent cleaning, regeneration, or replacement.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0067] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in this field based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A portable electrocatalytic water purifier based on titanium-based hollow fiber membrane, characterized by: The water purifier comprises a housing and a housing cover, wherein a pre-filtering device, an electrocatalytic membrane assembly, a water storage tank, and a manual suction pump are arranged inside the housing, and the pre-filtering device, the electrocatalytic membrane assembly, the water storage tank, and the manual suction pump are connected in sequence; The pre-filter device comprises a PP filter element and an activated carbon filter element; The electrocatalytic membrane assembly includes a clustered titanium-based hollow fiber membrane and a titanium mesh, wherein the clustered titanium-based hollow fiber membrane serves as an anode and the titanium mesh serves as a cathode, and the clustered titanium-based hollow fiber membrane and the titanium mesh are connected to a power source; The housing cover is provided with a water inlet and a water outlet, and the water inlet is connected to the PP filter element.

2. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to claim 1, characterized in that: The electrocatalytic membrane assembly includes multiple parallel titanium-based hollow fiber membranes and a titanium mesh surrounding the outside of the assembly; the clustered titanium-based hollow fiber membranes and the titanium mesh counter electrodes in the membrane assembly are located at the bottom end of the membrane assembly and are respectively connected to the positive and negative poles of the power supply.

3. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to claim 2, characterized in that: The titanium-based hollow fiber membrane is a single-channel or multi-channel titanium-based hollow fiber catalytic membrane. The inner diameter of the hollow fiber membrane is 0.1-4.0 mm, the outer diameter is 0.2-5.0 mm, the length is 5-30 cm, and the average pore size is 0.1-5 μm.

4. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to claim 2, characterized in that: The outer layer of the titanium-based hollow fiber membrane is loaded with an electrocatalytic layer, and the catalyst in the electrocatalytic layer comprises a composite of one or more of metal platinum, iridium oxide, ruthenium oxide, and titanium suboxide.

5. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to claim 1, characterized in that: The manual suction pump comprises two parts: a piston cylinder and a piston rod.

6. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to claim 1, characterized in that: The water purifier is also provided with a TDS sensor and a pressure sensor; the water purifier is also provided with a solar cell panel.

7. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to claim 1, characterized in that: The water treatment process of the water purifier comprises the following steps: The source water flows into the water purifier from the water inlet under the action of a manual suction pump, and first passes through a PP filter element to remove large particles of impurities; then it passes through an activated carbon filter element to remove some pollutants, including heavy metal ions and organic matter; the double-filtered water then flows through the electrocatalytic membrane assembly, where it is deeply purified under the dual action of electrochemical oxidation and membrane filtration to remove remaining dissolved organic matter, heavy metal ions and microorganisms; finally, the treated water flows from the electrocatalytic membrane assembly into the water storage tank for storage, making it convenient for direct drinking.

8. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to any one of claims 1 to 7, characterized in that: During the water treatment process, the pressure range provided by the manual suction pump is 0-5.0 bar; the effective voltage intensity of the electrocatalytic membrane assembly is 1.0-10.0V; the function of the pressure sensor is to monitor the transmembrane pressure value of the membrane assembly. If the pressure value monitored during operation is higher than 2.0 bar for a long time, the membrane assembly needs to be cleaned or replaced; the TDS sensor is used to detect the water quality of the outlet water. When the TDS value of the outlet water is detected to be higher than the drinking water standard, the catalytic membrane assembly needs to be regenerated or replaced; the effective service life of the PP filter element is 1-6 months, and the effective service life of the activated carbon filter element is 2-6 months. Regular monitoring is required to determine whether it needs to be replaced.

9. According to the portable electrocatalytic water purifier based on titanium-based hollow fiber membrane as described in claim 8, the catalytic membrane assembly is regenerated by backwashing, the voltage intensity in the system during backwashing is 1 to 10 V, the backwashing time is 7 to 10 minutes, and the interval time is 1 to 5 hours.

10. The portable electrocatalytic water purifier based on titanium-based hollow fiber membrane according to claim 7, characterized in that: The water source mainly includes: one or more of river water, lake water, swamp water, underground cave water, and spring water; the portable water purifier is used in outdoor tourism, field operations, military exercises, and flood control and disaster relief.

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