Integrated multi-stage filtration technology direct drinking water deep purification equipment

Abstract

The application discloses a kind of integrated multi-stage filtration technology's direct drinking water deep purification equipment, and the application relates to direct drinking water treatment technical field.The integrated multi-stage filtration technology's direct drinking water deep purification equipment, by the setting of filter cartridge, when water is in the process of multi-stage filtration, water can be in wave shape and flow through multiple reverse osmosis membranes inside filter cartridge, strengthen the contact effect of water and reverse osmosis membrane, improve the purification effect of pure water while increasing the filtration amount of pure water, while adjusting the height of the adjusting cylinder, water can be in uniform contact with multiple reverse osmosis membranes inside control adjusting cylinder, compared with traditional filtering mode, the filtration effect of reverse osmosis membrane can be effectively improved, and the service life of reverse osmosis membrane is prolonged.

Description

Technical Field

[0001] This invention relates to the field of direct drinking water treatment technology, specifically to a deep purification device for direct drinking water that integrates multi-stage filtration technology. Background Technology

[0002] Urban drinking water purification devices are key equipment to ensure drinking water safety. They remove impurities such as heavy metals, bacteria and organic matter from water bodies to make the water meet the high standards required for healthy direct drinking. Referring to the Chinese patent, publication number "CN120903752A", entitled "A Deep Purification Device and Method for Urban Healthy Direct Drinking Water", this patent points out that the hollow fiber nanofiltration membrane and reverse osmosis membrane in traditional urban direct drinking water purification devices are mostly set up independently, resulting in a long water flow path and easy damage to the membrane components due to water quality fluctuations. In addition, the water separated by the membrane is mostly directly output, or only treated by static adsorption or single ultraviolet irradiation. The water flow does not have sufficient contact with the adsorption material, and there are dead zones in the ultraviolet irradiation, making it difficult to completely remove residual organic matter and microorganisms, thus affecting the safety of the output water. In the above-mentioned water filtration using reverse osmosis membranes, the reverse osmosis membranes are usually multi-layered and then assembled into a sealed cylinder in a roll-up form. The water is then filtered by flowing through the RO membrane. Since the water flows from one end of the rolled-up RO membrane to the other, this method causes the outermost RO membrane to come into contact with the water first, resulting in a continuous increase in the difference in clogging between the front and rear RO membranes. Consequently, the filtration difference between the front and rear RO membranes continues to increase. To address this issue, we propose a deep drinking water purification device that integrates multi-stage filtration technology. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a deep purification device for direct drinking water that integrates multi-stage filtration technology, thus solving the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a direct drinking water deep purification device integrating multi-stage filtration technology, comprising a body, an assembly frame fixedly installed inside the body, and a pre-filter, an adsorption cartridge, and a filter cartridge fixedly installed at the bottom of the assembly frame, for multi-stage filtration of the transported water. The top of the filter cartridge is fixedly equipped with an inlet end for water to enter the filter cartridge. The end of the filter cartridge is fixedly equipped with a wastewater discharge pipe. The inside of the filter cartridge is fixedly equipped with a pure water delivery pipe. Multiple annular positioning frames are fixedly equipped on the outside of the pure water delivery pipe. A reverse osmosis membrane is fixedly equipped inside the annular positioning frames. Multiple slots are opened on both the upper and lower sides of the annular positioning frames. Multiple through holes adapted to the reverse osmosis membrane are opened inside the pure water delivery pipe, so that the water entering the filter cartridge can flow along the reverse osmosis membrane in a wave shape from top to bottom until the wastewater is discharged through the wastewater discharge pipe. The pure water that has passed through the reverse osmosis membrane enters the pure water delivery pipe through the through holes. A limiting cylinder is fixedly installed on the inner bottom of the filter cartridge. An adjusting cylinder is slidably connected to the end of the limiting cylinder. A negative pressure cavity is formed between the limiting cylinder and the adjusting cylinder and the inside of the filter cartridge. A negative pressure pipe is installed on the outside of the filter cartridge, and a negative pressure device is assembled at the end of the negative pressure pipe. The negative pressure device is used to drive the adjusting cylinder to rise and fall, thereby adjusting the pressure of the reverse osmosis membrane at different heights.

[0005] Preferably, an annular support is fixedly installed on the inner side of the reverse osmosis membrane, and the reverse osmosis membrane is located on the outside of the pure water delivery pipe in a hollow shape through the cooperation of the annular support.

[0006] Preferably, multiple annular seals are provided between the top of the regulating cylinder and the inner wall of the filter cylinder, and between the top of the limiting cylinder and the inner wall of the regulating cylinder.

[0007] Preferably, a diversion end is fixedly installed at the top of the pure water delivery pipe, which is used to divert the water entering the filter cartridge.

[0008] Preferably, an inlet pipe is fixedly installed inside the assembly frame for transporting water. Connecting pipes are provided between the primary filter cartridge and the adsorption cartridge, as well as between the adsorption cartridge and the filter cartridge. The connecting pipes are fixedly installed inside the assembly frame to connect the primary filter cartridge, the adsorption cartridge, and the filter cartridge in sequence. A sealing end is fixedly installed at the end of the connecting pipe, and a connecting end that matches the sealing end is fixedly installed at the end of both the primary filter cartridge and the adsorption cartridge.

[0009] Preferably, a U-shaped frame is fixedly installed inside both the primary filter cartridge and the adsorption cartridge. Multiple primary filter layers are fixedly installed on both sides of the U-shaped frame inside the primary filter cartridge, and multiple adsorption layers are fixedly installed on both sides of the U-shaped frame inside the adsorption cartridge.

[0010] Preferably, the bottom of the assembly frame is fixedly equipped with multiple assembly rings that are compatible with the pre-filter cartridge, the adsorption cartridge, and the filter cartridge.

[0011] Preferably, a post-filter cartridge is fixedly installed at the bottom of the machine body, and the end of the pure water delivery pipe is connected to the post-filter cartridge for secondary filtration of the filtered pure water. A water delivery pipe is fixedly installed at the end of the post-filter cartridge away from the pure water delivery pipe. A post-filter layer and a corrugated guide pipe are fixedly installed on both sides of the interior of the post-filter cartridge, and a sterilization lamp is fixedly installed inside the corrugated guide pipe.

[0012] Preferably, the machine body is equipped with a wastewater treatment module, which is used to perform secondary treatment on the wastewater discharged through the wastewater discharge pipe.

[0013] Preferably, the wastewater treatment module includes a secondary filter cartridge, which is fixedly installed inside the machine body. One end of the secondary filter cartridge is connected to a wastewater discharge pipe, and the other end of the secondary filter cartridge is connected to the water inlet of the adsorption cylinder through a return pipe. A reverse osmosis filtration module is installed inside the secondary filter cartridge, and a waste discharge pipe is fixedly installed on the outside of the secondary filter cartridge.

[0014] Preferably, a secondary booster pump is installed between the secondary filter cartridge and the wastewater discharge pipe, and a one-way valve is installed at the end of the return pipeline.

[0015] This invention provides a deep purification device for direct drinking water that integrates multi-stage filtration technology. Compared with existing technologies, it has the following advantages: (1) This direct drinking water deep purification equipment integrating multi-stage filtration technology, through the setting of the filter cylinder, when the water body is undergoing multi-stage filtration, can make the water body flow through multiple reverse osmosis membranes inside the filter cylinder in a wave shape, which enhances the contact effect between the water body and the reverse osmosis membrane, improves the purification effect of pure water, and increases the amount of pure water filtered out. At the same time, by adjusting the height of the regulating cylinder, the water body can be evenly contacted with multiple reverse osmosis membranes inside the regulating cylinder. Compared with the traditional filtration method, it can effectively improve the filtration effect of the reverse osmosis membrane and extend the service life of the reverse osmosis membrane.

[0016] (2) This deep purification device for drinking water that integrates multi-stage filtration technology can perform secondary filtration and sterilization of pure water and secondary filtration of wastewater through the cooperation of the post-filter cartridge and the wastewater treatment module. This effectively improves the utilization rate of water resources, reduces the amount of wastewater, and allows the water after secondary filtration to be transported to the adsorption cartridge to neutralize the unfiltered water, thereby reducing the pressure on the pre-filtration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of cross-section structure; Figure 3 For the present invention Figure 2Front view of the structural diagram; Figure 4 The present invention Figure 3 Enlarged schematic diagram of point A in the middle; Figure 5 This is a schematic cross-sectional view of the filter cartridge structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the structure of the regulating cylinder descending inside the filter cylinder according to the present invention; Figure 8 This is a cross-sectional view of the annular positioning frame of the present invention.

[0018] In the diagram: 1. Main body; 2. Assembly frame; 3. Assembly ring; 4. Pre-filter cartridge; 5. Adsorption cartridge; 6. Filter cartridge; 601. Pure water delivery pipe; 6011. Through hole; 6012. Diversion end; 602. Wastewater discharge pipe; 603. Negative pressure pipe; 604. Liquid inlet end; 7. Liquid inlet pipe; 8. Connecting pipe; 801. Sealing end; 9. U-shaped frame; 10. Pre-filter layer; 11. Adsorption layer; 12. Connecting end; 13. 1301 Limiting cylinder; 1302 Adjusting cylinder; 1303 Negative pressure device; 1304 Annular seal; 1405 Annular positioning frame; 1506 Groove; 1607 Reverse osmosis membrane; 1708 Annular support; 1809 Post-filter cartridge; 1900 Post-filter layer; 1000 Corrugated guide pipe; 2012 Sterilization lamp; 2100 Water supply pipe; 22101 Secondary filter cartridge; 23101 Waste discharge pipe; 2422 Secondary pressurization pump; 2532 Return pipeline. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8 The present invention provides two technical solutions, specifically including the following embodiments: Example

[0021] In this embodiment of the invention, a deep purification device for direct drinking water integrating multi-stage filtration technology includes a body 1, an assembly frame 2 is fixedly installed inside the body 1, and a pre-filter cartridge 4, an adsorption cartridge 5 and a filter cartridge 6 are fixedly installed at the bottom of the assembly frame 2, for multi-stage filtration of the transported water.

[0022] Specifically, the pre-filter cartridge 4 and the adsorption cartridge 5 are respectively equipped with a PP cotton layer and an activated carbon layer, which can realize multi-stage filtration treatment of water. Specifically, a liquid inlet 604 is fixedly installed on the top of the filter cartridge 6 to allow water to enter the filter cartridge 6. A wastewater discharge pipe 602 is fixedly installed on the bottom of the filter cartridge 6. A pure water delivery pipe 601 is fixedly installed inside the filter cartridge 6. Multiple annular positioning frames 14 are fixedly installed on the outside of the pure water delivery pipe 601. A reverse osmosis membrane 15 is fixedly installed inside the annular positioning frame 14. Multiple slots 1401 are opened on both the upper and lower sides of the annular positioning frame 14. Multiple through holes 6011 that are adapted to the reverse osmosis membrane 15 are opened inside the pure water delivery pipe 601 to allow the water entering the filter cartridge 6 to flow in a wave shape along the reverse osmosis membrane 15 from top to bottom until the wastewater is discharged through the wastewater discharge pipe 602. The pure water that passes through the reverse osmosis membrane 15 enters the pure water delivery pipe 601 through the through holes 6011. Specifically, when the water that has undergone secondary filtration enters the filter cartridge 6 through the connecting pipe 8, it enters the filter cartridge 6 through the liquid inlet 604. At this time, the water can contact the uppermost annular positioning frame 14 and enter its interior through the slot 1401 opened above the annular positioning frame 14. At this time, the water contacts the reverse osmosis membrane 15 and then flows along the reverse osmosis membrane 15 to the space between the reverse osmosis membrane 15 and the annular positioning frame 14, until the water flows out through the slot 1401 opened at the bottom of the reverse osmosis membrane 15 and continues to flow downward. During the flow, some water can be pressurized and pass through the reverse osmosis membrane 15. The water that passes through is pure water. At this time, the pure water can be pressurized and pass through the through hole 6011 and discharged through the pure water delivery pipe 601. The water that does not penetrate the reverse osmosis membrane 15 can continue to flow downward until it passes through multiple annular positioning frames 14 and flows to the bottom of the filter cartridge 6, and is discharged through the wastewater discharge pipe 602. This part of the water is wastewater. Specifically, the reverse osmosis membrane 15 is an existing RO membrane, made of polyester nonwoven fabric and cross-linked aromatic polyamide and other materials, which will not be described in detail here; Specifically, the reverse osmosis membrane 15 is hollow in shape, and its top is sloping. (Refer to...) Figure 8 When the water comes into contact with the top of the reverse osmosis membrane 15, it will be forced to flow downwards until the water passes between the reverse osmosis membrane 15 and the annular positioning frame 14, and is discharged through the slot 1401 opened at the bottom of the annular positioning frame 14, so that the water flows to the lower annular positioning frame 14. This flow mode allows the water to flow in a wave-like manner inside the filter cartridge 6 when it flows through multiple reverse osmosis membranes 15, further enhancing the contact area between the water and the reverse osmosis membrane 15, ensuring the purification effect of pure water while increasing the amount of pure water filtered out.

[0023] The reverse osmosis membrane 15 is fixedly assembled inside the annular positioning frame 14, as shown in the reference. Figure 8Annular brackets 1501 are fixedly installed on both the upper and lower sides inside the annular positioning frame 14. The annular brackets 1501 are used to support the upper and lower sides of the reverse osmosis membrane 15. The upper and lower ends of the reverse osmosis membrane 15 are fixedly connected to the pure water delivery pipe 601. The upper and lower sides of the inner side of the reverse osmosis membrane 15 are supported by the annular brackets 1501, so that the reverse osmosis membrane 15 forms a hollow shape and the upper and lower sides can always maintain tension, presenting a hollow shape. Figure 8 As shown, the inclined surface has an annular bracket 1501 fixed to the outside of the pure water delivery pipe 601. The assembly position of the annular bracket 1501 is located at the upper and lower ends of the inner side of the reverse osmosis membrane 15 to avoid affecting the contact area between the water flow and the reverse osmosis membrane 15. The annular bracket 1501 is fixedly connected to the pure water delivery pipe 601 by a connecting rod. The upper and lower ends of the reverse osmosis membrane 15 are fixedly connected to the pure water delivery pipe 601 to form a package. The through holes 6011 opened inside the pure water delivery pipe 601 correspond one-to-one with the assembly height of the multiple reverse osmosis membranes 15, which is used to ensure that pure water enters the pure water delivery pipe 601 through the through holes 6011. Both the inlet pipe 7 and the connecting pipe 8 are connected to a booster pump device, which is used to deliver pressurized water to the interior of the primary filter cartridge 4 and the filter cartridge 6 respectively. Furthermore, a limiting cylinder 13 is fixedly installed on the bottom inner side of the filter cartridge 6, and an adjusting cylinder 1301 is slidably connected to the end of the limiting cylinder 13. A negative pressure cavity is formed between the limiting cylinder 13 and the adjusting cylinder 1301 and the inside of the filter cartridge 6. A negative pressure pipe 603 is installed on the outside of the filter cartridge 6, and a negative pressure device 1302 is assembled at the end of the negative pressure pipe 603. The negative pressure device 1302 is used to drive the adjusting cylinder 1301 to rise and fall, thereby adjusting the pressure of the reverse osmosis membrane 15 at different heights. Multiple annular seals 1303 are provided between the top of the regulating cylinder 1301 and the inner wall of the filter cylinder 6, and between the top of the limiting cylinder 13 and the inner wall of the regulating cylinder 1301. The annular seals 1303 are used to ensure the sealing effect of the negative pressure cavity. The annular seals 1303 are existing sealing ring structures, which will not be described in detail here. The negative pressure device 1302 is an existing negative pressure device used to control the lifting and lowering operation of the regulating cylinder 1301, which will not be described in detail here; By operating the negative pressure device 1302, the regulating cylinder 1301 can be controlled to move upward inside the filter cylinder 6 when pressurization is increased, and the regulating cylinder 1301 can be driven to move downward inside the filter cylinder 6 when depressurization is increased, thereby realizing the height adjustment of the regulating cylinder 1301. By adjusting the height of the adjusting cylinder 1301, the uniformity of force on the reverse osmosis membranes 15 inside the different annular positioning frames 14 can be changed. This prevents the top reverse osmosis membrane 15 from being subjected to excessive force for a long time, which would increase the difference in filtration efficiency between it and the reverse osmosis membranes 15 below. This improves the filtration efficiency and service life of the reverse osmosis membranes 15. (Reference) Figure 5 and Figure 7 , Figure 5 The adjusting cylinder 1301 is located at the highest point inside the filter cylinder 6. Figure 7 The top of the adjusting cylinder 1301 descends to the middle position of the filter cylinder 6. At this time, the top of the adjusting cylinder 1301 is flush with the different annular positioning frames 14. When the adjusting cylinder 1301 is located at... Figure 5 At the indicated position, the water first passes through the uppermost annular positioning frame 14 and then moves downwards. This increases the load-bearing capacity of the reverse osmosis membrane 15 inside the uppermost annular positioning frame 14, and makes it more prone to clogging compared to the larger reverse osmosis membrane 15 below. When the regulating cylinder 1301 moves downwards, refer to... Figure 7 Water entering the filter cartridge 6 flows downwards between the annular positioning frame 14 and the filter cartridge 6. Some water passes through the reverse osmosis membrane 15 above the end of the regulating cylinder 1301, while most water passes through the reverse osmosis membrane 15 flush with the end of the regulating cylinder 1301. Therefore, by controlling the periodic reciprocating movement of the regulating cylinder 1301, the water can be made to contact the multiple reverse osmosis membranes 15 inside the regulating cylinder 1301 evenly. Compared with traditional filtration methods, this effectively improves the filtration effect of the reverse osmosis membranes 15, avoids increasing the clogging difference between the top and bottom reverse osmosis membranes 15, and extends the service life of the reverse osmosis membranes 15. This is achieved by adjusting the height of the regulating cylinder 1301. The adjustment can adjust the wastewater discharge of the water body filtration. When the regulating cylinder 1301 rises to the highest point, the water body needs to pass through multiple layers of reverse osmosis membrane 15 from top to bottom until the wastewater is discharged through the wastewater discharge pipe 602. When the regulating cylinder 1301 descends, a large amount of water body only needs to pass through the reverse osmosis membrane 15 that is flush with the top of the regulating cylinder 1301 and then flow downwards until the wastewater is discharged through the wastewater discharge pipe 602. As the reverse osmosis membrane 15 through which the water body flows decreases, the wastewater volume increases. When the regulating cylinder 1301 descends, some water body can contact the bottom of the reverse osmosis membrane 15 above the regulating cylinder 1301, so that a large amount of wastewater can carry away the impurities remaining at the bottom of the reverse osmosis membrane 15, further avoiding impurity residue. The reciprocating lifting and lowering of the regulating cylinder 1301 is controlled by the negative pressure device 1302. The periodicity is set based on the existing PLC module. For example, the regulating cylinder 1301 is set to descend by the height of the annular positioning frame 14 with the number of days until it descends to the bottom and rises by the same height with the number of days. This process is repeated. This will not be elaborated here. Figure 5 The multiple annular positioning frames 14 inside the middle limiting cylinder 13 are of the same size, and the multiple annular positioning frames 14 inside the control regulating cylinder 1301 are of the same size. The size of the annular positioning frames 14 inside the control regulating cylinder 1301 exceeds the size of the annular positioning frames 14 inside the limiting cylinder 13. When adjusting the pressure of the reverse osmosis membrane 15 inside the annular positioning frame 14, it is limited to the annular positioning frames 14 inside the control regulating cylinder 1301.

[0024] A diversion end 6012 is fixedly installed at the top of the pure water delivery pipe 601. The diversion end 6012 is used to divert the water entering the filter cylinder 6. When the water enters the filter cylinder 6, it will first contact the diversion end 6012 and then flow to the annular positioning frame 14 below to ensure the uniformity of water flow.

[0025] An inlet pipe 7 is fixedly installed inside the assembly frame 2 for transporting water. Connecting pipes 8 are provided between the primary filter cartridge 4 and the adsorption cartridge 5, as well as between the adsorption cartridge 5 and the filter cartridge 6. The connecting pipes 8 are fixedly installed inside the assembly frame 2 for connecting the primary filter cartridge 4, the adsorption cartridge 5 and the filter cartridge 6 in sequence. A sealing end 801 is fixedly installed at the end of the connecting pipe 8. Connecting ends 12 that are compatible with the sealing end 801 are fixedly installed at the ends of the primary filter cartridge 4 and the adsorption cartridge 5.

[0026] Both the primary filter cartridge 4 and the adsorption cartridge 5 have U-shaped frames 9 fixedly installed inside. Multiple primary filter layers 10 are fixedly installed on both sides of the U-shaped frame 9 inside the primary filter cartridge 4, and multiple adsorption layers 11 are fixedly installed on both sides of the U-shaped frame 9 inside the adsorption cartridge 5.

[0027] The bottom of the assembly frame 2 is fixedly equipped with multiple assembly rings 3 that are compatible with the primary filter cartridge 4, the adsorption cartridge 5, and the filter cartridge 6. Specifically, both the connecting end 12 and the sealing end 801 are plug-in type. The assembly ring 3 is equipped with bolts. After the primary filter cartridge 4 and the adsorption cartridge 5 are inserted into the corresponding assembly ring 3, the connecting end 12 and the sealing end 801 installed at their ends are plugged in. Then, the primary filter cartridge 4 and the adsorption cartridge 5 are locked to the assembly ring 3 by tightening the bolts. The bolts are not shown in the figure. Specifically, during the water purification process, pressurized water enters the pre-filter cartridge 4 through the inlet pipe 7, and then flows along the U-shaped frame 9 inside the pre-filter cartridge 4 to complete the first-stage filtration. The water after the first-stage filtration flows through the connecting pipe 8 to the adsorption cartridge 5, and then flows along the U-shaped frame 9 inside the adsorption cartridge 5 to complete the second-stage filtration. The water after the second-stage filtration flows through the connecting pipe 8 to the filter cartridge 6 for the third-stage filtration treatment, thereby achieving multi-stage filtration of the water. Specifically, when the water flows along the U-shaped frame 9 inside the primary filter cylinder 4, it can be initially filtered through the primary filter layer 10 installed on the outside of the U-shaped frame 9. The primary filter layer 10 is made of existing PP cotton material and is used to filter impurities such as mud and rust in the water. When the water that has completed the initial filtration flows along the U-shaped frame 9 inside the adsorption cylinder 5, it can be filtered through the adsorption layer 11 installed on the outside of the U-shaped frame 9. The adsorption layer 11 is made of existing activated carbon material and is used to filter and adsorb discoloration, organic matter, pesticide residues and other substances in the water. The aforementioned primary filter layer 10 and adsorption layer 11 are both ring-shaped and installed at an angle, so that the water can be filtered sequentially along multiple primary filter layers 10 and multiple adsorption layers 11. The pressurization method of the water entering the inlet pipe 7 is driven by an existing pump, which will not be described in detail here.

[0028] Example 2: Based on Example 1, a post-filter cartridge 16 is fixedly installed at the bottom of the body 1. The end of the pure water delivery pipe 601 is connected to the post-filter cartridge 16 for secondary filtration of the filtered pure water. A water delivery pipe 20 is fixedly installed at the end of the post-filter cartridge 16 away from the pure water delivery pipe 601. A post-filter layer 17 and a corrugated guide pipe 18 are fixedly installed on both sides inside the post-filter cartridge 16, and a sterilization lamp 19 is fixedly installed inside the corrugated guide pipe 18. Specifically, the sterilization lamp 19 is an existing ultraviolet lamp used to sterilize pure water. When the pure water is discharged through the pure water delivery pipe 601, it can enter the interior of the post-filter cartridge 16, and then pass through the post-filter layer 17 and the corrugated guide pipe 18 before being discharged through the water delivery pipe 20. The post-filter layer 17 is made of existing activated carbon material, and the corrugated guide tube 18 is made of existing quartz glass.

[0029] The machine body 1 is equipped with a wastewater treatment module, which is used to perform secondary treatment on the wastewater discharged through the wastewater discharge pipe 602.

[0030] The wastewater treatment module includes a secondary filter cartridge 21, which is fixedly installed inside the body 1. One end of the secondary filter cartridge 21 is connected to the wastewater discharge pipe 602, and the other end of the secondary filter cartridge 21 is connected to the water inlet of the adsorption cylinder 5 through the return pipe 23. A reverse osmosis filtration module is installed inside the secondary filter cartridge 21, and a waste discharge pipe 2101 is fixedly installed on the outside of the secondary filter cartridge 21.

[0031] A secondary booster pump 22 is installed between the secondary filter cartridge 21 and the wastewater discharge pipe 602. A one-way valve is installed at the end of the return pipe 23. The one-way valve is an existing device used to prevent water from flowing back into the return pipe 23. The secondary booster pump 22 is an existing device used to pressurize the water entering the secondary filter cartridge 21. Specifically, the wastewater discharged through the wastewater discharge pipe 602 can enter the secondary filter cartridge 21 through the secondary booster pump 22, and then be filtered by the reverse osmosis filtration module. The reverse osmosis filtration module is the existing RO membrane. The filtered water enters the adsorption cartridge 5 through the return pipe 23, and the filtered waste liquid is discharged through the waste discharge pipe 2101. By performing secondary filtration on wastewater, the utilization rate of water resources can be effectively improved and the amount of wastewater reduced. At the same time, the water after secondary filtration can be transported into the adsorption tank 5 to neutralize the unfiltered water, reducing the pressure on the pre-filtration.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A deep purification device for direct drinking water integrating multi-stage filtration technology, comprising a body (1), wherein an assembly frame (2) is fixedly installed inside the body (1), characterized in that: The bottom of the assembly frame (2) is fixedly installed with a primary filter cartridge (4), an adsorption cartridge (5), and a filter cartridge (6) for multi-stage filtration of the transported water. The top of the filter cartridge (6) is fixedly installed with an inlet end (604) to allow water to enter the filter cartridge (6). A wastewater discharge pipe (602) is fixedly installed at the end of the filter cartridge (6). A pure water delivery pipe (601) is fixedly installed inside the filter cartridge (6). Multiple annular positioning frames (14) are fixedly installed on the outside of the pure water delivery pipe (601). A reverse osmosis membrane (15) is fixedly installed inside the annular positioning frame (14). Multiple slots (1401) are opened on both the upper and lower sides of the annular positioning frame (14). The water delivery pipe (601) has multiple through holes (6011) adapted to the reverse osmosis membrane (15) inside, which are used to allow the water entering the filter cylinder (6) to flow in a wave shape from top to bottom along the reverse osmosis membrane (15) until the wastewater is discharged through the wastewater discharge pipe (602). The pure water that passes through the reverse osmosis membrane (15) enters the pure water delivery pipe (601) through the through holes (6011). A limiting cylinder (13) is fixedly installed on the bottom inner side of the filter cylinder (6). An adjusting cylinder (1301) is slidably connected to the end of the limiting cylinder (13). The adjusting cylinder (1301) is used to slide up and down inside the filter cylinder (6) to adjust the pressure of the reverse osmosis membrane (15) at different heights.

2. The direct drinking water deep purification device integrating multi-stage filtration technology according to claim 1, characterized in that: The limiting cylinder (13) and the adjusting cylinder (1301) form a negative pressure cavity with the inside of the filter cylinder (6). A negative pressure pipe (603) is installed on the outside of the filter cylinder (6) and a negative pressure device (1302) is installed at the end of the negative pressure pipe (603). The negative pressure device (1302) is used to drive the adjusting cylinder (1301) to rise and fall.

3. The direct drinking water deep purification device integrating multi-stage filtration technology according to claim 1, characterized in that: An annular support (1501) is fixedly installed on the inner side of the reverse osmosis membrane (15), and the reverse osmosis membrane (15) is located on the outside of the pure water delivery pipe (601) in a hollow shape through the cooperation of the annular support (1501).

4. The direct drinking water deep purification device integrating multi-stage filtration technology according to claim 2, characterized in that: Multiple annular seals (1303) are provided between the top of the regulating cylinder (1301) and the inner wall of the filter cylinder (6) and between the top of the limiting cylinder (13) and the inner wall of the regulating cylinder (1301).

5. The direct drinking water deep purification device integrating multi-stage filtration technology according to claim 1, characterized in that: The top end of the pure water delivery pipe (601) is fixedly installed with a diversion end (6012), which is used to divert the water entering the filter cylinder (6).

6. The direct drinking water deep purification device integrating multi-stage filtration technology according to claim 1, characterized in that: The assembly frame (2) is fixedly installed with an inlet pipe (7) for transporting water. The primary filter (4) and the adsorption cylinder (5) are connected by a connecting pipe (8), as are the adsorption cylinder (5) and the filter cylinder (6). The connecting pipe (8) is fixedly installed inside the assembly frame (2) to connect the primary filter (4), the adsorption cylinder (5) and the filter cylinder (6) in sequence. The end of the connecting pipe (8) is fixedly installed with a sealing end (801). The ends of the primary filter (4) and the adsorption cylinder (5) are both fixedly installed with a connecting end (12) that matches the sealing end (801).

7. A deep drinking water purification device integrating multi-stage filtration technology according to claim 6, characterized in that: Both the primary filter cartridge (4) and the adsorption cartridge (5) are fixedly installed with U-shaped frames (9). Multiple primary filter layers (10) are fixedly installed on both sides of the U-shaped frame (9) inside the primary filter cartridge (4), and multiple adsorption layers (11) are fixedly installed on both sides of the U-shaped frame (9) inside the adsorption cartridge (5).

8. A deep purification device for direct drinking water integrating multi-stage filtration technology according to claim 6, characterized in that: The bottom of the assembly frame (2) is fixedly equipped with multiple assembly rings (3) that are compatible with the primary filter cartridge (4), the adsorption cartridge (5), and the filter cartridge (6).

9. A deep drinking water purification device integrating multi-stage filtration technology according to claim 1, characterized in that: A post-filter cartridge (16) is fixedly installed at the bottom of the body (1). The end of the pure water delivery pipe (601) is connected to the post-filter cartridge (16) for secondary filtration of the filtered pure water. A water delivery pipe (20) is fixedly installed at the end of the post-filter cartridge (16) away from the pure water delivery pipe (601). A post-filter layer (17) and a corrugated guide pipe (18) are fixedly installed on both sides inside the post-filter cartridge (16). A sterilization lamp (19) is fixedly installed inside the corrugated guide pipe (18).

10. A deep drinking water purification device integrating multi-stage filtration technology according to claim 1, characterized in that: The machine body (1) is equipped with a wastewater treatment module inside. The wastewater treatment module is used to perform secondary treatment on the wastewater discharged through the wastewater discharge pipe (602). The wastewater treatment module includes a secondary filter cartridge (21). The secondary filter cartridge (21) is fixedly installed inside the machine body (1). One end of the secondary filter cartridge (21) is connected to the wastewater discharge pipe (602). The other end of the secondary filter cartridge (21) is connected to the water inlet end of the adsorption cylinder (5) through the return pipe (23). A reverse osmosis filtration module is installed inside the secondary filter cartridge (21). A waste discharge pipe (2101) is fixedly installed on the outside of the secondary filter cartridge (21). A secondary booster pump (22) is installed between the secondary filter cartridge (21) and the wastewater discharge pipe (602). A one-way valve is installed at the end of the return pipe (23).

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