Combined filtering type water treatment equipment

Abstract

The invention relates to combined filtering type water treatment equipment, and relates to the technical field of water treatment.The combined filtering type water treatment equipment comprises a filtering tank and a column type ultrafiltration membrane, a filtering medium is arranged in the filtering tank, and a liquid inlet pipe and a liquid outlet pipe are fixedly arranged on the filtering tank; the liquid inlet end of the column type ultrafiltration membrane is provided with a water inlet pipe and a first regulating valve which are communicated with the liquid outlet pipe, and the liquid outlet end of the column type ultrafiltration membrane is provided with a water outlet pipe and a second regulating valve; the liquid inlet end of the column type ultrafiltration membrane is provided with an air flushing pipe connected with an external air pump, the periphery of the water outlet pipe is fixedly provided with a water flushing pipe located between the column type ultrafiltration membrane and the second adjusting valve, and the column type ultrafiltration membrane is provided with a water outlet for discharging back flushing water and a water discharging pipe fixedly arranged on the water outlet; a first control valve and a second control valve are respectively arranged on the water flushing pipe and the drainage pipe, and the external water source can be mixed with a cleaning agent to be injected into the water flushing pipe; the cleaning effect on stubborn impurities adhered to the surface of the ultrafiltration membrane is improved.

Description

Technical Field

[0001] The present application relates to the technical field of water treatment, and in particular to a combined filtering water treatment device. Background Art

[0003] Faced with this severe challenge, sewage treatment technology is a key means to protect water resources and improve environmental quality, and its importance is self-evident. Among them, a sewage treatment process that integrates a filter tank and a column ultrafiltration membrane has attracted much attention due to its high efficiency. The process first uses the quartz sand layer in the filter tank to coarsely filter the sewage to effectively remove large suspended particles; then, it uses a column ultrafiltration membrane for fine filtration to further remove bacteria, viruses and some soluble pollutants to ensure that the effluent quality meets the standards.

[0004] However, this technology has also exposed certain problems during long-term operation. Specifically, although the filter layer and ultrafiltration membrane have certain self-cleaning capabilities and can reduce impurity accumulation through water backwashing, it is often difficult to completely remove stubborn impurities on the surface of the ultrafiltration membrane. These impurities will gradually accumulate to form a blockage layer or contamination layer, resulting in a significant decrease in the filtration efficiency of the ultrafiltration membrane, which in turn affects the performance and stability of the entire treatment system. There is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a combined filtration-type water treatment device to solve the problem in the above-mentioned related technologies that stubborn impurities adhered to the surface of the ultrafiltration membrane are difficult to clean, thus affecting the subsequent filtration effect.

[0006] The combined filtering water treatment equipment provided in this application adopts the following technical solution: A combined filtering water treatment device comprises a filter tank and a columnar ultrafiltration membrane, wherein a filter medium is arranged inside the filter tank, and a liquid inlet pipe and a liquid outlet pipe are fixedly arranged at the top and the bottom of the filter tank respectively; a water inlet pipe connected to the liquid outlet pipe and a first regulating valve installed on the water inlet pipe are arranged at the liquid inlet end of the columnar ultrafiltration membrane, and a water outlet pipe and a second regulating valve installed on the water outlet pipe are arranged at the liquid outlet end of the columnar ultrafiltration membrane; an air flushing pipe connected to an external air pump is arranged at the liquid inlet end of the columnar ultrafiltration membrane, a water flushing pipe located between the columnar ultrafiltration membrane and the second regulating valve is fixedly arranged on the outer periphery of the water outlet pipe, a drain outlet for discharging backwash water and a drain pipe fixedly arranged on the drain outlet are arranged on the columnar ultrafiltration membrane; a first control valve and a second control valve are arranged on the water flushing pipe and the drain pipe respectively, and the external water source can be mixed with a cleaning agent and injected into the water flushing pipe.

[0007] By adopting the above technical solution, when the column ultrafiltration membrane needs to be cleaned, it can be cleaned by combining air cleaning and water backwashing. When the column ultrafiltration membrane is cleaned by using the air flushing pipe, the first regulating valve, the second regulating valve, the first control valve and the second control valve are closed, and the external air pump is first connected through the air flushing pipe to clean the impurities adhering to the surface of the ultrafiltration membrane; when the column ultrafiltration membrane is backwashed, the first regulating valve and the second regulating valve are closed, the first control valve and the second control valve are opened, and the external water source can be mixed with the cleaning agent and injected into the water flushing pipe together, and then the column ultrafiltration membrane is flushed, and finally the flushed wastewater is discharged from the drain pipe; thereby improving the cleaning effect of the stubborn impurities adhering to the surface of the ultrafiltration membrane, and also ensuring the subsequent filtration effect of the column ultrafiltration membrane.

[0008] Optionally, a water tank for supplying water to the water flushing pipe is provided on the side of the columnar ultrafiltration membrane, an exhaust port is provided on the top of the water tank, and the end of the water flushing pipe away from the water outlet pipe is connected to the bottom of the water tank.

[0009] By adopting the above technical scheme, due to the installation setting of the water storage tank, when the water storage tank needs to store water, the first control valve is opened and the second regulating valve is closed, so that the filtered water is injected into the water storage tank through the water flushing pipe. When the water is full, the first control valve is closed and the second regulating valve is opened, so that the filtered water continues to be discharged through the outlet pipe; this facilitates the water storage application of the water storage tank, and the filtered water can be used to backwash the ultrafiltration membrane, reducing the flushing cost.

[0010] Optionally, a medicine liquid tank and a support frame for supporting the medicine liquid tank are provided on the top of the water storage tank, and an injection pipe inserted into the water storage tank is provided on the bottom side of the medicine liquid tank, and a third control valve is provided on the injection pipe.

[0011] By adopting the above technical solution, due to the setting of the liquid medicine tank, the detergent can be pre-stored inside the liquid medicine tank, and then when needed, the third control valve is opened to allow the detergent to be injected into the water storage tank through the injection pipe.

[0012] Optionally, a stirring shaft and a stirring motor are provided on the side of the water tank, one end of the stirring shaft is inserted into the water tank along the exhaust port, and a plurality of stirring blades are fixedly provided on the outer periphery of the stirring shaft extending into the water tank; the stirring shaft is rotatably arranged on the water tank, the stirring motor is fixedly arranged on the top of the water tank, a worm is coaxially fixedly arranged on the output shaft of the stirring motor, and a worm wheel meshing with the worm is fixedly arranged on the outer periphery of the stirring shaft outside the water tank.

[0013] By adopting the above technical solution, after the detergent is injected into the water storage tank, the stirring motor is started, and the meshing setting of the worm and the worm gear drives the stirring shaft and the stirring blade to rotate synchronously, thereby evenly mixing the water and detergent in the water storage tank, thereby improving the cleaning effect during the subsequent backwashing of the column ultrafiltration membrane.

[0014] Optionally, a mounting through hole for inserting a liquid injection tube is provided on the end of the stirring shaft along its axial direction, and a gap exists between the outer peripheral surface of the liquid injection tube and the inner wall of the mounting through hole.

[0015] By adopting the above technical solution, due to the setting of the installation through hole on the stirring shaft, the installation and insertion of the injection pipe is realized, and at the same time, the space on the top of the water storage tank is more reasonably utilized, thereby improving the space utilization rate.

[0016] Optionally, a protective plate located above the stirring shaft is fixedly provided on the outer periphery of the injection tube, and a gap exists between the protective plate and the end of the stirring shaft facing the medicine liquid tank.

[0017] By adopting the above technical solution, due to the installation of the protective plate, the possibility of external dust or other impurities entering the water storage tank through the upper opening of the gap is reduced, thereby ensuring the cleanliness of the water in the water storage tank.

[0018] Optionally, a support plate is fixedly provided on the end of the stirring shaft facing the medicine liquid tank, and the upper side of the support plate abuts against the bottom side of the protective plate; a limiting through hole is provided on the support plate for the injection pipe to pass through, a plurality of first air guide holes connected to the mounting through hole are provided on the support plate, and a second air guide hole that can overlap with the first air guide hole is provided on the protective plate.

[0019] By adopting the above technical solution, when the water storage tank is filled with water or backflushed, the stirring shaft is rotated to drive the support plate to rotate synchronously, so that the first air guide hole and the second air guide hole overlap, thereby ensuring the balance of air pressure inside and outside the water storage tank; when the water storage tank is storing water under normal circumstances, the first air guide hole and the second air guide hole are misaligned, so that the water storage tank is in a closed state as a whole, reducing the possibility of external dust or other impurities entering the water storage tank through the first air guide hole and the second air guide hole.

[0020] Optionally, a cleaning piece is provided on the side of the support plate, and the cleaning piece includes a connecting rod installed on the support plate and a scraper fixed to one end of the connecting rod. A cleaning cotton is fixedly sleeved on the outer periphery of the scraper, and the cleaning cotton on one side of the scraper can abut against the side of the protective plate away from the support plate.

[0021] By adopting the above technical solution, the stirring motor can be started to rotate the stirring shaft and the support plate synchronously, so that the cleaning cotton on the scraper can clean the upper side of the protective plate, reducing the possibility of impurities accumulating and adhering to the side of the protective plate.

[0022] Optionally, a hinge seat is fixedly provided on the outer periphery of the support plate and is hinged to the end of the connecting rod away from the scraper, a locking through hole is provided on the connecting rod, and a first locking screw hole is provided on the outer periphery of the support plate; when the cleaning cotton on one side of the scraper abuts against the side of the protective plate away from the support plate, a butterfly screw is provided on the side of the support plate which can penetrate the locking through hole and then be screwed into the first locking screw hole.

[0023] By adopting the above technical solution, when the cleaning cotton on one side of the scraper abuts against the side of the protective plate away from the support plate, the connecting rod flips over, and the first locking screw hole and the locking through hole coincide with each other. At this time, the butterfly screw passes through the locking through hole and is screwed into the first locking screw hole to fix the connecting rod.

[0024] Optionally, a second locking screw hole is opened on the outer periphery of the support plate, and the connecting rod can be flipped downward around the hinge seat to make the cleaning cotton on the other side of the scraper abut against the upper side of the worm gear. In this state, the locking through hole coincides with the second locking screw hole.

[0025] By adopting the above technical solution, the connecting rod can be flipped downward around the hinge seat, so that the cleaning cotton on the other side of the scraper is abutted against the upper side of the worm gear. At this time, the locking through hole coincides with the second locking screw hole, and the butterfly screw is passed through the locking through hole and then screwed into the second locking screw hole. In this state, the upper side of the worm gear can be cleaned, reducing the possibility of dust or other impurities adhering to the surface of the worm gear.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the column ultrafiltration membrane needs to be cleaned, it can be cleaned by combining air cleaning and water backwashing to improve the cleaning effect of stubborn impurities adhering to the surface of the ultrafiltration membrane, while also ensuring the subsequent filtration effect of the column ultrafiltration membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a simplified structural diagram of the assembly and coordination of the filter tank and the column type ultrafiltration membrane in Example 1 of the present application; Figure 2 This is a simplified structural diagram of the assembly and coordination of the filter tank, the column-type ultrafiltration membrane and the water storage tank in Example 2 of the present application; Figure 3 This is a schematic diagram of the structure of the installation and coordination of the water storage pipe and the liquid medicine tank in Example 2 of the present application; Figure 4This is a partial structural diagram of the installation and coordination of the water storage pipe and the liquid medicine tank in Example 2 of the present application; Figure 5 It is a partial cross-sectional structural schematic diagram of the installation and coordination of the water storage pipe and the liquid medicine tank in Example 2 of the present application; Figure 6 yes Figure 5 A magnified schematic diagram of part A; Figure 7 It is a partial structural diagram of the installation and coordination of the cleaning components according to an embodiment of the present application.

[0029] In the figure, 1, filter tank; 11, liquid inlet pipe; 12, liquid outlet pipe; 2, column ultrafiltration membrane; 21, water inlet pipe; 22, first regulating valve; 23, water outlet pipe; 24, second regulating valve; 25, air flushing pipe; 26, water flushing pipe; 261, first control valve; 27, drain pipe; 271, second control valve; 3, water storage tank; 31, exhaust port; 4, liquid tank; 41, support frame; 42, liquid injection pipe; 421, third control valve; 43, protective plate; 431 , second air guide hole; 5, stirring assembly; 51, stirring shaft; 511, stirring blade; 512, mounting through hole; 52, stirring motor; 53, worm; 54, worm wheel; 55, support plate; 551, limiting through hole; 552, first air guide hole; 553, hinged seat; 554, first locking screw hole; 555, second locking screw hole; 6, cleaning part; 61, connecting rod; 611, locking through hole; 62, scraper; 63, cleaning cotton; 64, butterfly screw. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0031] Embodiment 1: Reference Figure 1 A combined filtering water treatment device comprises a filter tank 1 and a columnar ultrafiltration membrane 2 installed on the ground, wherein a filter medium (not shown in the figure) is arranged inside the filter tank 1, and a liquid inlet pipe 11 and a liquid outlet pipe 12 are respectively fixedly arranged at the top and the bottom of the filter tank 1; a liquid inlet end of the columnar ultrafiltration membrane 2 is provided with a water inlet pipe 21 connected with the liquid outlet pipe 12, and a first regulating valve 22 installed on the water inlet pipe 21; a liquid outlet end of the columnar ultrafiltration membrane 2 is provided with a water outlet pipe 23, and a second regulating valve 24 installed on the water outlet pipe 23; The filter medium is quartz sand, and the liquid inlet pipe 11 and the liquid outlet pipe 12 are provided with corresponding electromagnetic valves for controlling their on and off, which will not be described in detail here; and the first regulating valve 22 and the second regulating valve 24 are both electromagnetic valves. When treating sewage, the first regulating valve 22 and the second regulating valve 24 are first opened, and then the sewage to be treated is first injected into the filter tank 1 through the liquid inlet pipe 11, and then discharged from the liquid outlet pipe 12 after being treated by the filter medium, and injected into the column ultrafiltration membrane 2 through the water inlet pipe 21, and then discharged through the water outlet pipe 23.

[0032] Reference Figure 1 The liquid inlet end of the columnar ultrafiltration membrane 2 is provided with an air flushing pipe 25 connected to an external air pump, and a water flushing pipe 26 connected to an external water source is fixedly provided on the outer periphery of the water outlet pipe 23, wherein the air flushing pipe 25 is provided with a corresponding solenoid valve, and the water flushing pipe 26 is located between the columnar ultrafiltration membrane 2 and the second regulating valve 24; the columnar ultrafiltration membrane 2 is provided with a drain port for discharging backwash water and a drain pipe 27 fixed on the drain port, a first control valve 261 is provided on the water flushing pipe 26, and a second control valve 271 is provided on the drain pipe 27, wherein the first control valve 261 and the second control valve 271 are both conventional solenoid valves; When the air flushing tube 25 is used to clean the columnar ultrafiltration membrane 2, the first regulating valve 22, the second regulating valve 24, the first control valve 261 and the second control valve 271 are closed, and the external air pump is first connected through the air flushing tube 25 to clean the impurities adhering to the surface of the ultrafiltration membrane; when the columnar ultrafiltration membrane 2 is reversely flushed, the first regulating valve 22 and the second regulating valve 24 are closed, the first control valve 261 and the second control valve 271 are opened, and the external water source can be mixed with the cleaning agent and injected into the water flushing tube 26, and then the columnar ultrafiltration membrane 2 is flushed, and finally the waste water after flushing is discharged from the drain pipe 27.

[0033] The implementation principle of the embodiment of the present application is: When the column ultrafiltration membrane 2 needs to be cleaned, it can be cleaned by combining air cleaning and water backwashing to improve the cleaning effect of stubborn impurities adhered to the surface of the ultrafiltration membrane, while also ensuring the subsequent filtering effect of the column ultrafiltration membrane 2.

[0034] Embodiment 2: Reference Figure 2 and Figure 3 The difference between the embodiment of the present application and the embodiment 1 is that a water storage tank 3 for supplying water to the water flushing pipe 26 is provided on the side of the columnar ultrafiltration membrane 2, an exhaust port 31 is provided on the top of the water storage tank 3, and the end of the water flushing pipe 26 away from the water outlet pipe 23 is connected to the bottom of the water storage tank 3; When the water storage tank 3 needs to store water, open the first control valve 261 and close the second regulating valve 24, so that the filtered water is injected into the water storage tank 3 through the water flushing pipe 26; when the water is full, close the first control valve 261 and open the second regulating valve 24, so that the filtered water continues to be discharged through the water outlet pipe 23.

[0035] The height of the mouth of the liquid inlet pipe 11 is not lower than the top height of the water tank 3. Due to the existence of water pressure, the filtered water can be automatically injected from the water flushing pipe 26 into the water tank 3 for storage without a water pump. In other embodiments, the outside of the water tank 3 can be connected to other water pipes for use, so that the sewage treatment plant can use the water in the water tank 3 for its own use.

[0036] Reference Figure 3 and Figure 4 The top of the water tank 3 is provided with a medicine tank 4 and a support frame 41 for supporting the medicine tank 4. The bottom of the medicine tank 4 is provided with a liquid injection pipe 42 inserted into the water tank 3. The liquid injection pipe 42 is provided with a third control valve 421, wherein the third control valve 421 is a conventional solenoid valve. The detergent can be stored in the medicine tank 4 in advance, and then the third control valve 421 is opened when needed to allow the detergent to be injected into the water tank 3 through the liquid injection pipe 42.

[0037] Reference Figure 4 and Figure 5 A stirring assembly 5 is provided in the water storage tank 3, wherein the stirring assembly 5 includes a stirring shaft 51 and a stirring motor 52. One end of the stirring shaft 51 is inserted into the water storage tank 3 along the exhaust port 31, and a plurality of stirring blades 511 are evenly distributed on the outer circumference of the stirring shaft 51 extending into the water storage tank 3; the stirring shaft 51 is rotatably arranged on the water storage tank 3, the stirring motor 52 is fixedly arranged on the top of the water storage tank 3, a worm 53 is coaxially fixedly arranged on the output shaft of the stirring motor 52, and a worm wheel 54 meshing with the worm 53 is fixedly arranged on the outer circumference of the stirring shaft 51 outside the water storage tank 3; The end of the stirring shaft 51 is provided with a mounting through hole 512 for inserting the injection tube 42 along its axial direction, and there is a gap between the outer peripheral surface of the injection tube 42 and the inner wall of the mounting through hole 512. When the detergent is injected into the water storage tank 3, the stirring motor 52 is started to drive the stirring shaft 51 and the stirring blade 511 to rotate, thereby mixing the water and the detergent evenly, thereby improving the cleaning effect of the subsequent backwashing of the columnar ultrafiltration membrane 2.

[0038] Reference Figure 5 and Figure 6A protective plate 43 located above the stirring shaft 51 is fixedly provided on the outer periphery of the liquid injection tube 42, and a gap exists between the protective plate 43 and the end of the stirring shaft 51 facing the liquid medicine tank 4; a support plate 55 is fixedly provided on the end of the stirring shaft 51 facing the liquid medicine tank 4, and the upper side of the support plate 55 abuts against the bottom side of the protective plate 43; a limiting through hole 551 for the liquid injection tube 42 to pass through is provided on the support plate 55, a plurality of first air guide holes 552 communicating with the mounting through hole 512 are provided on the support plate 55, and a second air guide hole 431 that can overlap with the first air guide hole 552 is provided on the protective plate 43; When the water storage tank 3 is filled with water or backflushed, the stirring shaft 51 is rotated to drive the support plate 55 to rotate synchronously, so that the first air guide hole 552 and the second air guide hole 431 overlap, thereby ensuring the balance of air pressure inside and outside the water storage tank 3; when the water storage tank 3 is storing water under normal circumstances, the first air guide hole 552 and the second air guide hole 431 are misaligned, so that the water storage tank 3 is in a closed state as a whole, reducing the possibility of external dust or other impurities entering the water storage tank 3 through the first air guide hole 552 and the second air guide hole 431.

[0039] Reference Figure 6 A cleaning member 6 is provided on the side of the support plate 55, wherein the cleaning member 6 comprises two connecting rods 61 symmetrically mounted on the support plate 55 and a scraper 62 fixedly mounted on one end of the connecting rod 61, and a cleaning cotton 63 is fixedly sleeved on the outer periphery of the scraper 62, and the cleaning cotton 63 on one side of the scraper 62 can abut against the side of the protective plate 43 away from the support plate 55; In this state, the stirring motor 52 can be started to rotate the stirring shaft 51 and the support plate 55 synchronously, so that the cleaning cotton 63 on the scraper 62 cleans the upper side of the protective plate 43, reducing the possibility of impurities accumulating and adhering to the upper side of the protective plate 43.

[0040] Reference Figure 6 and Figure 7 , a butterfly screw 64 is provided on the side of the support plate 55, a hinge seat 553 hinged to the end of the connecting rod 61 away from the scraper 62 is fixed on the outer periphery of the support plate 55, a locking through hole 611 is provided on the connecting rod 61, and a first locking screw hole 554 and a second locking screw hole 555 are provided on the outer periphery of the support plate 55; when the cleaning cotton 63 on one side of the scraper 62 abuts against the side of the protective plate 43 away from the support plate 55, the connecting rod 61 is turned over at this time, and the first locking screw hole 554 and the locking through hole 611 coincide with each other. At this time, the butterfly screw 64 is passed through the locking through hole 611 and then screwed into the first locking screw hole 554; When the cleaning cotton 63 on the other side of the scraper 62 abuts against the upper side of the worm wheel 54, the connecting rod 61 can be turned downward around the hinge seat 553. In this state, the locking through hole 611 coincides with the second locking screw hole 555, and the butterfly screw 64 is passed through the locking through hole 611 and then screwed into the second locking screw hole 555. With this arrangement, the staff can turn both connecting rods 61 upward or downward to fix them, or turn one upward and the other downward to fix them, and regularly clean the upper side of the worm wheel 54 or the upper side of the protective plate 43 as needed.

[0041] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A combined filtration-type water treatment device, comprising a filter tank (1) and a columnar ultrafiltration membrane (2), wherein a filter medium is arranged inside the filter tank (1), and a liquid inlet pipe (11) and a liquid outlet pipe (12) are respectively fixedly arranged at the top and the bottom of the filter tank (1); a liquid inlet end of the columnar ultrafiltration membrane (2) is provided with a water inlet pipe (21) connected to the liquid outlet pipe (12), and a first regulating valve (22) installed on the water inlet pipe (21); and a liquid outlet end of the columnar ultrafiltration membrane (2) is provided with a water outlet pipe (23), and a second regulating valve (24) installed on the water outlet pipe (23); It is characterized in that The liquid inlet end of the columnar ultrafiltration membrane (2) is provided with an air flushing pipe (25) connected to an external air pump; the outer periphery of the water outlet pipe (23) is fixedly provided with a water flushing pipe (26) located between the columnar ultrafiltration membrane (2) and the second regulating valve (24); the columnar ultrafiltration membrane (2) is provided with a drain port for discharging backwash water and a drain pipe (27) fixedly provided on the drain port; the water flushing pipe (26) and the drain pipe (27) are respectively provided with a first control valve (261) and a second control valve (271); the external water source can be mixed with a cleaning agent and injected into the water flushing pipe (26).

2. A combined filtering water treatment device according to claim 1, characterized in that: A water storage tank (3) for supplying water to a water flushing pipe (26) is provided on the side of the columnar ultrafiltration membrane (2), an exhaust port (31) is provided on the top of the water storage tank (3), and the end of the water flushing pipe (26) away from the water outlet pipe (23) is connected to the bottom of the water storage tank (3).

3. A combined filtering water treatment device according to claim 2, characterized in that: A medicine liquid tank (4) is provided on the top of the water storage tank (3), and a support frame (41) for supporting the medicine liquid tank (4) is fixedly provided thereon; a liquid injection pipe (42) inserted into the water storage tank (3) is fixedly provided on the bottom side of the medicine liquid tank (4); and a third control valve (421) is provided on the liquid injection pipe (42).

4. A combined filtering water treatment device according to claim 3, characterized in that: A stirring shaft (51) and a stirring motor (52) are provided on the side of the water storage tank (3); one end of the stirring shaft (51) is inserted into the water storage tank (3) along the exhaust port (31); and a plurality of stirring blades (511) are fixedly provided on the outer circumference of the stirring shaft (51) extending into the water storage tank (3); The stirring shaft (51) is rotatably mounted on the water storage tank (3), the stirring motor (52) is fixedly mounted on the top of the water storage tank (3), a worm (53) is coaxially fixedly mounted on the output shaft of the stirring motor (52), and a worm wheel (54) meshing with the worm (53) is fixedly mounted on the outer periphery of the stirring shaft (51) outside the water storage tank (3).

5. A combined filtering water treatment device according to claim 4, characterized in that: A mounting through hole (512) for inserting a liquid injection pipe (42) is provided on the end of the stirring shaft (51) along its own axial direction, and a gap exists between the outer peripheral surface of the liquid injection pipe (42) and the inner wall of the mounting through hole (512).

6. A combined filtering water treatment device according to claim 5, characterized in that: A protective plate (43) located above the stirring shaft (51) is fixedly provided on the outer periphery of the injection pipe (42), and a gap exists between the protective plate (43) and the end of the stirring shaft (51) facing the liquid medicine tank (4).

7. A combined filtering water treatment device according to claim 6, characterized in that: A support plate (55) is fixedly provided on the end of the stirring shaft (51) facing the liquid medicine tank (4), and the upper side of the support plate (55) abuts against the bottom side of the protective plate (43); The support plate (55) is provided with a limiting through hole (551) for the liquid injection pipe (42) to pass through, the support plate (55) is provided with a plurality of first air guide holes (552) connected to the mounting through hole (512), and the protective plate (43) is provided with second air guide holes (431) that can overlap with the first air guide holes (552).

8. A combined filtering water treatment device according to claim 7, characterized in that: A cleaning member (6) is provided on the side of the support plate (55), and the cleaning member (6) comprises a connecting rod (61) mounted on the support plate (55) and a scraper (62) fixed to one end of the connecting rod (61), and a cleaning cotton (63) is fixedly sleeved on the outer periphery of the scraper (62), and the cleaning cotton (63) on one side of the scraper (62) can abut against the side of the protective plate (43) away from the support plate (55).

9. A combined filtering water treatment device according to claim 8, characterized in that: A hinge seat (553) is fixedly provided on the outer periphery of the support plate (55) and is hingedly connected to the end of the connecting rod (61) away from the scraper plate (62); a locking through hole (611) is provided on the connecting rod (61); and a first locking screw hole (554) is provided on the outer periphery of the support plate (55); When the cleaning cotton (63) on one side of the scraper (62) abuts against the side of the protective plate (43) away from the support plate (55), the side of the support plate (55) is provided with a butterfly screw (64) that can penetrate the locking through hole (611) and then be screwed into the first locking screw hole (554).

10. A combined filtering water treatment device according to claim 9, characterized in that: A second locking screw hole (555) is provided on the outer periphery of the support plate (55), and the connecting rod (61) can be turned downward around the hinge seat (553) so that the cleaning cotton (63) on the other side of the scraper (62) abuts against the upper side of the worm gear (54). In this state, the locking through hole (611) coincides with the second locking screw hole (555).

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