A low-energy consumption ultrafiltration membrane water purification device and its working method

Abstract

The present invention discloses a low-energy ultrafiltration membrane water purification device and its working method, which relates to the field of water purification equipment. In order to solve the problem in the prior art that in order to ensure that no new impurities are introduced into the clean water during the backwash process, the backwash water is generally used to backwash with clean water after ultrafiltration, but the ultrafiltration process itself will generate wastewater, and the clean water generated is less than the amount of water entering the source. Reusing clean water for backwashing is equivalent to wasting the clean water obtained by the equipment working for a long time due to backwashing, which consumes high energy and further increases the wastewater rate. The interior of the protective shell is configured as a filter chamber, and the middle of the interior of the filter chamber is provided with an intermediate air filter column. The lower end of the intermediate air filter column is installed with an air inlet pipe, and the air inlet pipe extends to the outside of the lower end cover. The outer annular array inside the filter chamber is installed with a filter element, and the filter element includes an upper outer shell, and the interior of the upper outer shell is configured as an intermediate cavity.

Description

Technical Field

[0001] The present invention relates to the field of water purification equipment, in particular to a low-energy consumption ultrafiltration membrane water purification device and a working method thereof. Background Art

[0002] Ultrafiltration membranes are artificial permeable membranes used in the ultrafiltration process. They are generally made from polymer materials such as cellulose acetate, cellulose acetate esters, polyethylene, polysulfone, and polyamide. Ultrafiltration membranes filter water through their own filtration function, so impurities often adhere to their interior. If left untreated for extended periods, these impurities can affect subsequent water filtration. Therefore, backwashing devices are installed to flush away these impurities adhering to the membrane.

[0003] For example, the Chinese authorized patent (ultrafiltration membrane assembly) with announcement number CN 212269544 U: includes two screw barrels, two end covers connected to the two screw barrels respectively, the screw barrels are provided with a backwash water inlet, the end covers are provided with a backwash water outlet, a membrane tube with ultrafiltration membrane filaments built in and sealed with the two screw barrels, annular gaskets are provided in the two screw barrels, wherein the ends of the ultrafiltration membrane filaments extending into the two screw barrels are provided with epoxy resin filling layers filled between the ultrafiltration membrane filaments and between the ultrafiltration membrane filaments and the annular gaskets, and is characterized in that: an annular baffle connected to the inner wall of the screw barrel is provided between the ultrafiltration membrane filaments and the inner wall of the screw barrel, an annular water distribution chamber is formed between the annular baffle and the inner wall of the screw barrel, a water hole is provided on the annular baffle, and no water hole is provided on the annular baffle at a position opposite to the backwash water inlet.

[0004] Although the above-mentioned existing technology has the function of backwashing, in order to ensure that no new impurities are introduced into the clean water during the backwashing process, the backwashing water is generally clean water after ultrafiltration. Wastewater will be generated in the ultrafiltration process itself, and the clean water generated is less than the amount of water entering. Reusing clean water for backwashing is equivalent to wasting the clean water obtained by the equipment working for a long time due to backwashing, which consumes high energy and further increases the wastewater rate. Summary of the Invention

[0005] The purpose of the present invention is to provide a low-energy ultrafiltration membrane water purification device and its working method, so as to solve the problem raised in the above background technology that in order to ensure that no new impurities are introduced into the clean water during the backwashing process, the backwashing water is generally the clean water after ultrafiltration for backwashing, and the ultrafiltration process itself will generate waste water, and the clean water generated is less than the amount of incoming water source. The clean water is then used for backwashing, which is equivalent to the clean water obtained by the equipment working for a long time being wasted due to backwashing, resulting in high energy consumption and further increasing the wastewater rate.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-energy consumption ultrafiltration membrane water purification device, comprising an upper end cover, a protective shell and a lower end cover, the upper end cover, the protective shell and the lower end cover are arranged from top to bottom, the interior of the protective shell is set as a filter cavity, the middle of the interior of the filter cavity is provided with an intermediate air filter column, the lower end of the intermediate air filter column is provided with an air inlet pipe, the air inlet pipe extends to the outside of the lower end cover, the outer annular array inside the filter cavity is provided with a filter element, the filter element comprises an upper outer shell, the interior of the upper outer shell is provided with an intermediate cavity, the interior of the intermediate cavity is provided with an air supply coil, the upper outer shell and the intermediate air filter column are provided with an air supply coil, They are connected by an air supply pipe, and an air intake control valve is installed on the air supply pipe. The filter element also includes a first connecting column and a second connecting column. The first connecting column is fixed to the lower end of the upper outer shell. A breathable and water-proof membrane is arranged on the outside between the first connecting column and the second connecting column. An ultrafiltration membrane is arranged along the inner side of the breathable and water-proof membrane between the first connecting column and the second connecting column. A clean water cavity is formed between the ultrafiltration membrane and the breathable and water-proof membrane, and a sewage cavity is formed inside the ultrafiltration membrane. An air supply branch pipe is arranged in an annular array inside the first connecting column, and the upper end of the air supply branch pipe is connected to an air supply coil. The lower end of the air supply branch pipe extends to the interior of the sewage cavity and is fixed to a fixed air nozzle.

[0007] Preferably, the interior of the upper end cover is set as a flow equalizing chamber, and the front end of the upper end of the flow equalizing chamber is rotatably connected to the rotating shaft through a bearing, and the middle annular array outside the rotating shaft is provided with a rotating page, which is welded and fixed to the rotating shaft, and a first bevel gear is provided on one side of the outside of the rotating shaft, and the lower end of the first bevel gear away from the rotating page is meshed and connected to the second bevel gear, and the lower end of the second bevel gear is fixedly connected to the connecting vertical shaft, and the lower end of the connecting vertical shaft is fixedly connected to the driving gear, and a flow equalizing component is provided at the lower end of the flow equalizing chamber, and the flow equalizing component includes a fixed ring and a rotating ring, the fixed ring is located outside the rotating ring, the fixed ring and the rotating ring are rotatably connected through a bearing, the fixed ring is fixed to the inner wall of the upper end cover, and an adjusting tooth portion is provided on the outer surface of the rotating ring along the upper end of the fixed ring, and the adjusting tooth portion is meshed with the driving gear.

[0008] Preferably, an intermediate connecting disk is fixedly connected to the middle of the rotating ring, and a water leakage hole is provided through the intermediate connecting disk. The water leakage hole is eccentrically arranged, and the upper end surface of the intermediate connecting disk is inclined toward the water leakage hole.

[0009] Preferably, the interior of the lower end cover is set as an intermediate inner cavity, a sewage outlet pipe is installed in the second connecting column, one end of the sewage outlet pipe extends to the interior of the sewage cavity, and the other end of the sewage outlet pipe extends to the interior of the intermediate inner cavity, and a sewage drain pipe is installed at the lower end of the lower end cover, one end of the sewage drain pipe extends to the interior of the intermediate inner cavity.

[0010] Preferably, clean water outlet branches are installed in the cross direction inside the second connecting column, one end of the clean water outlet branches extends to the inside of the clean water cavity, the other end of each group of four clean water outlet branches is commonly connected to the clean water outlet connecting pipe, and a clean water drain pipe is installed at the lower end of the middle inner cavity, one end of the clean water drain pipe extends to the outside of the lower end cover, and the other end of the clean water outlet connecting pipe on each filter element is connected to the clean water drain pipe.

[0011] Preferably, a tap water inlet pipe is installed at the upper end of the upper end cover, one end of the tap water inlet pipe extends to the outside of the upper end cover, and the other end of the tap water inlet pipe extends to the inside of the flow equalization cavity. A tap water inlet pipe is installed in the upper outer shell, one end of the tap water inlet pipe extends to the inside of the flow equalization cavity, and the other end of the tap water inlet pipe extends to the inside of the sewage cavity.

[0012] Preferably, an exhaust pipe is installed at the upper end of one side of the protective shell, one end of the exhaust pipe extends to the outside of the protective shell, and the other end of the exhaust pipe extends to the inside of the filter cavity.

[0013] Preferably, a water inlet control valve is installed on the water inlet pipe located inside the upper outer shell, and the upper outer shell is connected to the upper end cover through a connecting ring pipe.

[0014] A working method comprises the following steps:

[0015] Step 1: Tap water enters the flow-equalizing chamber through the tap water inlet pipe, and then enters the sewage chamber through the tap water pipe on the filter element;

[0016] Step 2: Impurities in the tap water remain in the sewage chamber after being filtered by the ultrafiltration membrane, and then enter the middle inner chamber through the sewage outlet pipe and are discharged through the sewage discharge pipe; the filtered clean water remains in the clean water chamber and enters the clean water outlet connecting pipe through the clean water outlet branch on the second connecting column and is discharged through the clean water discharge pipe;

[0017] Step 3: After filtering for a period of time, close the water inlet control valve on the water pipe in the first filter element to stop water from entering the filter element. At the same time, open the air inlet control valve connected to the air pipe on the corresponding filter element. The gas delivered by the external equipment enters the middle filter column through the air inlet pipe, and is then delivered to the fixed air nozzle through the air pipe, air supply coil and air supply branch pipe. The fixed air nozzle sprays high-pressure gas to clean the inner surface of the ultrafiltration membrane.

[0018] Step 4: After the cleaning is completed by spraying high-pressure gas from the fixed air nozzle, the gas passes through the ultrafiltration membrane and the breathable and water-proof membrane into the filter cavity and is then discharged outward through the exhaust pipe;

[0019] Step 5: Then close the air inlet control valve corresponding to the first filter element and open the water inlet control valve. The unfiltered sewage will flush the impurities downwards, and the impurity-mixed wastewater will enter the middle cavity through the sewage outlet pipe and then be discharged through the sewage pipe.

[0020] Step 6: Clean the interior of other filter elements until all filter elements are cleaned.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In this invention, after filtering for a period of time, the water inlet control valve on the tap water pipe in the first filter element is closed to stop water from entering the filter element, and the air inlet control valve connected to the air supply pipe on the corresponding filter element is opened at the same time. The external equipment transmits gas through the air inlet pipe into the middle air filter column, and then through the air supply pipe, the air supply coil and the air supply branch pipe to the fixed air nozzle. The fixed air nozzle sprays high-pressure gas to clean the inner surface of the ultrafiltration membrane. After the fixed air nozzle sprays high-pressure gas to clean, the gas passes through the ultrafiltration membrane and the breathable and waterproof membrane to flow into the filter cavity, and then is discharged outward through the exhaust pipe; then the air inlet control valve corresponding to the first filter element is closed, and the water inlet control valve is opened. The unfiltered sewage flushes the impurities downward, and the impurity-mixed wastewater enters the middle inner cavity through the sewage pipe, and is then discharged through the sewage pipe. No clean water is used for cleaning during the entire process, which reduces energy consumption. In addition, the gas used for cleaning can be discharged with the cooperation of other structures, which does not affect the subsequent filtration treatment of the water source. This solves the problem that in order to ensure that no new impurities are introduced into the clean water during the backwashing process, the backwashing water is generally clean water after ultrafiltration for backwashing. The ultrafiltration process itself will produce waste water, and the clean water produced is less than the amount of water entering. Using clean water for backwashing is equivalent to wasting the clean water obtained by the equipment working for a long time due to backwashing, which consumes high energy and further increases the wastewater rate.

[0023] 2. In this invention, during the cleaning process, the water inlet control valve on the water pipe in the first filter element is first closed to stop the water from entering the filter element, and at the same time, the air inlet control valve connected to the air pipe on the corresponding filter element is opened to start air intake; during this process, the other filter elements perform filtering work normally, and when the internal cleaning process of other filter elements is subsequently repeated, the filter elements that have been cleaned and the filter elements waiting to be cleaned still perform filtering work normally; that is, the cleaning process does not affect the normal filtration of the water source, only the water filtration efficiency is slightly reduced, reducing the impact of equipment shutdown on the operation of other water processing equipment.

[0024] 3. In this invention, tap water enters the flow-equalizing chamber through the tap water inlet pipe. The water's flow upon entering the chamber drives the rotating blade and the rotating shaft to rotate, causing the first bevel gear on the rotating shaft to rotate, which in turn drives the second bevel gear, the connecting vertical shaft, and the drive gear to rotate. The drive gear drives the rotating ring to rotate within the fixed ring through the meshing relationship with the adjusting teeth on the rotating ring. The rotating blade drives the water to rotate backward, reaching the upper end of the intermediate connecting disk and flowing downward through the water leakage hole. Under the rotation of the intermediate connecting disk, the tap water rotates and flows downward. With the ring-shaped filter element, the water source stays at the upper end of each filter element for an equal amount of time, achieving uniform water flow. This allows each filter element to operate at essentially the same efficiency, preventing overload and inefficient water filtration, which is more conducive to the long-term use of the water purification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of a low-energy consumption ultrafiltration membrane water purification device of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of a low-energy consumption ultrafiltration membrane water purification device of the present invention;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of a filter element of a low-energy consumption ultrafiltration membrane water purification device of the present invention;

[0028] Figure 4 This is a schematic diagram of the internal structure of a filter element of a low-energy consumption ultrafiltration membrane water purification device of the present invention;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of a rotating page of a low-energy ultrafiltration membrane water purification device of the present invention;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of a flow-sharing component of a low-energy ultrafiltration membrane water purification device of the present invention.

[0031] Figure: 1, upper end cover; 2, protective shell; 3, lower end cover; 4, flow-equalizing chamber; 5, filter chamber; 6, middle inner chamber; 7, tap water inlet pipe; 8, rotating leaf; 9, rotating shaft; 10, first bevel gear; 11, second bevel gear; 12, connecting vertical shaft; 13, driving gear; 14, flow-equalizing assembly; 15, fixed ring; 16, rotating ring; 17, adjusting gear; 18, middle connecting plate; 19, water leakage hole; 20, exhaust pipe; 21, sewage pipe; 22, clean water pipe; 23, middle filter column ; 24. Air inlet pipe; 25. Air supply pipe; 26. Air inlet control valve; 27. Filter element; 28. First connecting column; 29. ​​Breathable and waterproof membrane; 30. Clean water cavity; 31. Ultrafiltration membrane; 32. Sewage cavity; 33. Second connecting column; 34. Sewage outlet pipe; 35. Clean water outlet branch; 36. Clean water outlet connecting pipe; 37. Upper outer shell; 38. Middle cavity; 39. Air supply coil; 40. Air supply branch; 41. Fixed air nozzle; 42. Tap water inlet pipe; 43. Water inlet control valve; 44. Connecting ring pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See also Figure 1-6The present invention provides an embodiment: a low-energy consumption ultrafiltration membrane water purification device, comprising an upper end cover 1, a protective shell 2 and a lower end cover 3, the upper end cover 1, the protective shell 2 and the lower end cover 3 are arranged from top to bottom, the interior of the protective shell 2 is set as a filter chamber 5, the interior of the upper end cover 1 is set as a flow-averaging chamber 4, the middle of the filter chamber 5 is provided with an intermediate air filter column 23, the lower end of the intermediate air filter column 23 is provided with an air inlet pipe 24, the air inlet pipe 24 extends to the outside of the lower end cover 3, the outer annular array inside the filter chamber 5 The filter element 27 is installed in the column. The filter element 27 is cylindrical in this figure, and can also be set to spiral downward to increase the processing path. The filter element 27 includes an upper outer shell 37, the interior of the upper outer shell 37 is set as an intermediate cavity 38, and the interior of the intermediate cavity 38 is provided with an air supply coil 39. The upper outer shell 37 is connected to the intermediate filter column 23 through an air supply pipe 25. The air supply pipe 25 is equipped with an intake control valve 26. The filter element 27 also includes a first connecting column 28 and a second connecting column 33. The first connecting column 28 is fixed At the lower end of the upper outer shell 37, a breathable and water-proof membrane 29 is provided on the outside between the first connecting column 28 and the second connecting column 33. The breathable and water-proof membrane 29 is a prior art that can isolate the liquid while ensuring the passage of gas. An ultrafiltration membrane 31 is provided along the inner side of the breathable and water-proof membrane 29 between the first connecting column 28 and the second connecting column 33. A clean water cavity 30 is formed between the ultrafiltration membrane 31 and the breathable and water-proof membrane 29, and a sewage cavity 32 is formed inside the ultrafiltration membrane 31. There is an air supply pipe in the annular array inside the first connecting column 28. 40. The upper end of the air supply branch pipe 40 is connected to the air supply coil 39, and the lower end of the air supply branch pipe 40 extends to the interior of the sewage chamber 32 and is fixed to the fixed air nozzle 41. The gas delivered by the external equipment enters the middle air filter column 23 through the air inlet pipe 24, and is then delivered to the fixed air nozzle 41 through the air supply pipe 25, the air supply coil 39 and the air supply branch pipe 40; the setting position of the fixed air nozzle 41 is very close to the ultrafiltration membrane 31. When the fixed air nozzle 41 delivers air, it forms a structure similar to an air curtain to clean impurities adhering to the inner side of the ultrafiltration membrane 31.The interior of the lower end cover 3 is set as an intermediate inner cavity 6, and a sewage outlet pipe 34 is installed in the second connecting column 33, one end of the sewage outlet pipe 34 extends to the interior of the sewage cavity 32, and the other end of the sewage outlet pipe 34 extends to the interior of the intermediate inner cavity 6. A sewage discharge pipe 21 is installed at the lower end of the lower end cover 3, and one end of the sewage discharge pipe 21 extends to the interior of the intermediate cavity 6. After cleaning, the air intake control valve 26 corresponding to the cleaning filter element 27 is closed, and the water inlet control valve 43 is opened. The unfiltered sewage flushes the impurities downward, and the impurity-mixed wastewater enters the intermediate inner cavity 6 through the sewage outlet pipe 34 and is then discharged through the sewage discharge pipe 21; clean water outlet manifolds 35 are installed in the cross direction inside the second connecting column 33, one end of the clean water outlet manifold 35 extends to the interior of the clean water cavity 30, and the other end of each group of four clean water outlet manifolds 35 is connected to the clean water outlet connecting pipe 36. A clean water discharge pipe 22 is installed at the lower end of the intermediate cavity 6, and one end of the clean water discharge pipe 22 extends to the outside of the lower end cover 3 , the other end of the clean water connection pipe 36 on each filter element 27 is connected to the clean water discharge pipe 22; the upper end of the upper end cover 1 is installed with a tap water inlet pipe 7, one end of the tap water inlet pipe 7 extends to the outside of the upper end cover 1, and the other end of the tap water inlet pipe 7 extends to the inside of the flow equalization cavity 4, and the upper outer shell 37 is installed with a tap water inlet pipe 42, one end of the tap water inlet pipe 42 extends to the inside of the flow equalization cavity 4, and the other end of the tap water inlet pipe 42 extends to the inside of the sewage cavity 32; one side of the protective shell 2 An exhaust pipe 20 is installed at the upper end, one end of the exhaust pipe 20 extends to the outside of the protective shell 2, and the other end of the exhaust pipe 20 extends to the inside of the filter chamber 5. After the fixed air nozzle 41 sprays high-pressure gas for cleaning, the gas passes through the ultrafiltration membrane 31 and the breathable and waterproof membrane 29 and flows into the filter chamber 5, and then is discharged to the outside through the exhaust pipe 20; a water inlet control valve 43 is installed on the tap water pipe 42 located inside the upper outer shell 37, and the upper outer shell 37 is connected to the upper end cover 1 through a connecting ring pipe 44.

[0034] Control valves are also provided on other pipes of this water purification device, but the control valve settings are the same as those on the current water purification device. Therefore, this water purification device will not be introduced in detail, and only the special control valves that are different from the existing technology will be introduced in detail.

[0035] A working method comprises the following steps:

[0036] Step 1: Tap water enters the flow equalization chamber 4 through the tap water inlet pipe 7, and then passes through the filter element 27 and enters the tap water pipe 42 into the sewage chamber 32;

[0037] Step 2: Impurities in the tap water remain in the sewage chamber 32 after being filtered by the ultrafiltration membrane 31. They then enter the intermediate inner chamber 6 through the sewage outlet pipe 34 and are discharged through the sewage discharge pipe 21. The filtered clean water remains in the clean water chamber 30 and enters the clean water outlet connecting pipe 36 through the clean water outlet branch 35 on the second connecting column 33, and is then discharged through the clean water discharge pipe 22.

[0038] Step 3: After filtering for a period of time, the water inlet control valve 43 on the water inlet pipe 42 in the first filter element 27 is closed to stop the water from entering the filter element 27. At the same time, the air inlet control valve 26 connected to the air supply pipe 25 on the corresponding filter element 27 is opened. The air delivered by the external equipment enters the middle air filter column 23 through the air supply pipe 24, and is then delivered to the fixed air nozzle 41 through the air supply pipe 25, the air supply coil 39 and the air supply branch pipe 40. The fixed air nozzle 41 sprays high-pressure gas to clean the inner surface of the ultrafiltration membrane 31 and remove adhered impurities.

[0039] Step 4: After the high-pressure gas is sprayed out from the fixed gas nozzle 41 and the cleaning is completed, the gas passes through the ultrafiltration membrane 31 and the breathable and waterproof membrane 29 and flows into the filter chamber 5, and then is discharged to the outside through the exhaust pipe 20. The gas can be collected by the gas storage box and then connected to the air pump through a pipeline. The air pump is also provided with an input pipe connected to the outside world, realizing partial recycling of the gas and reducing the need for re-filtration of the gas;

[0040] Step 5: After that, close the air inlet control valve 26 corresponding to the first filter element 27 and open the water inlet control valve 43. The unfiltered sewage flushes the impurities downwards, and the impurity-mixed wastewater enters the middle inner cavity 6 through the sewage outlet pipe 34 and is then discharged through the sewage discharge pipe 21.

[0041] Step 6: Clean the interior of other filter elements 27 until the interior of all filter elements 27 is cleaned.

[0042] During the cleaning process, first close the water inlet control valve 43 on the tap water pipe 42 in the first filter element 27 to stop water from entering the filter element 27, and at the same time open the air inlet control valve 26 connected to the air pipe 25 on the corresponding filter element 27 to start air intake; during this process, the other filter elements 27 perform filtering work normally, and subsequently repeat the internal cleaning process of other filter elements 27, while the filter elements 27 that have been cleaned and the filter elements waiting to be cleaned still perform filtering work normally; that is, the cleaning process does not affect the normal filtration of the water source, only the water filtration efficiency is slightly reduced, reducing the impact of equipment shutdown on the operation of other water processing equipment.

[0043] See also Figure 2 、 Figure 5 and Figure 6The front end of the upper end of the flow-equalizing chamber 4 is rotatably connected to a rotating shaft 9 through a bearing. The middle annular array outside the rotating shaft 9 has a rotating page 8. The rotating page 8 is welded and fixed to the rotating shaft 9. The rotating page 8 is directly located at the downward flow position of the water. Since the rotating shaft 9 is located at the front end of the upper end of the flow-equalizing chamber 4, the rotating page 8 rotates backward under the action of the water flow; a first bevel gear 10 is provided on one side of the outer side of the rotating shaft 9, and the lower end of the first bevel gear 10 away from the rotating page 8 is meshed with a second bevel gear 11. The second bevel gear The lower end of 11 is fixedly connected to a connecting vertical shaft 12, and the lower end of the connecting vertical shaft 12 is fixedly connected to a driving gear 13. A flow balancing component 14 is provided at the lower end inside the flow balancing chamber 4. The flow balancing component 14 includes a fixed ring 15 and a rotating ring 16. The fixed ring 15 is located outside the rotating ring 16. The fixed ring 15 and the rotating ring 16 are rotatably connected through a bearing. The fixed ring 15 is fixed to the inner wall of the upper end cover 1, and an adjusting tooth portion 17 is provided on the outer surface of the rotating ring 16 along the upper end of the fixed ring 15. The adjusting tooth portion 17 is engaged with the driving gear 13.

[0044] See also Figure 6 An intermediate connecting disk 18 is fixedly connected to the middle of the rotating ring 16, and a leakage hole 19 is provided through the intermediate connecting disk 18. The leakage hole 19 is eccentrically arranged, and the upper end surface of the intermediate connecting disk 18 is inclined toward the leakage hole 19, that is, the liquid at the upper end of the intermediate connecting disk 18 will flow toward the leakage hole 19 due to the inclined end surface.

[0045] A current sharing method includes the following steps:

[0046] Step 1: Tap water enters the flow equalization chamber 4 through the tap water inlet pipe 7, and drives the rotating leaf 8 and the rotating shaft 9 to rotate;

[0047] Step 2: The first bevel gear 10 on the rotating shaft 9 rotates, driving the second bevel gear 11, the connecting vertical shaft 12 and the driving gear 13 to rotate;

[0048] Step 3: The driving gear 13 drives the rotating ring 16 to rotate within the fixed ring 15 through the meshing relationship with the adjusting tooth portion 17 on the rotating ring 16;

[0049] Step 4: The rotating leaf 8 drives the water to rotate backward, reaches the upper end of the middle connecting plate 18, and flows downward through the leaking hole 19. Under the rotation of the middle connecting plate 18, the tap water rotates and flows downward.

[0050] With the ring-shaped filter element 27, the water source stays at the upper end of each filter element 27 for an equal amount of time, achieving uniform flow of the water source, so that each filter element 27 basically works at the same efficiency, will not be overloaded, and will not filter water inefficiently, which is more conducive to the long-term use of the water purification device.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A low-energy consumption ultrafiltration membrane water purification device, comprising an upper end cover (1), a protective shell (2) and a lower end cover (3), wherein the upper end cover (1), the protective shell (2) and the lower end cover (3) are arranged from top to bottom, and is characterized in that: The interior of the protective shell (2) is configured as a filter chamber (5), an intermediate air filter column (23) is provided in the middle of the interior of the filter chamber (5), an air inlet pipe (24) is installed at the lower end of the intermediate air filter column (23), and the air inlet pipe (24) extends to the outside of the lower end cover (3), a filter element (27) is installed in an outer ring array inside the filter chamber (5), and the filter element (27) includes an upper outer shell (37), the interior of the upper outer shell (37) is configured as an intermediate cavity (38), and an air supply coil (39) is provided inside the intermediate cavity (38), and the upper outer shell (37) and the intermediate air filter column (23) are connected via an air supply pipe (25), and the air supply pipe (25) is provided with an air intake control valve (26), the filter element (27) further comprises a first connecting column (28) and a second connecting column (33), the first connecting column (28) is fixed to the lower end of the upper outer shell (37), an air-permeable water-proof membrane (29) is provided outside between the first connecting column (28) and the second connecting column (33), an ultrafiltration membrane (31) is provided along the inner side of the air-permeable water-proof membrane (29) between the first connecting column (28) and the second connecting column (33), a clean water cavity (30) is formed between the ultrafiltration membrane (31) and the air-permeable water-proof membrane (29), a sewage cavity (32) is formed inside the ultrafiltration membrane (31), and the first connecting column (28) has an internal annular array. An air supply branch pipe (40) is arranged, the upper end of the air supply branch pipe (40) is connected to an air supply coil (39), and the lower end of the air supply branch pipe (40) extends to the interior of the sewage chamber (32) and is fixed to a fixed air nozzle (41); the interior of the upper end cover (1) is provided with a flow equalization chamber (4), the front end of the upper end of the flow equalization chamber (4) is rotatably connected to a rotating shaft (9) through a bearing, the middle annular array outside the rotating shaft (9) is provided with a rotating leaf (8), the rotating leaf (8) is welded and fixed to the rotating shaft (9), a first bevel gear (10) is provided on one side of the outer side of the rotating shaft (9), and the lower end of the first bevel gear (10) away from the rotating leaf (8) is meshed and connected to a second bevel gear (10) 1), the lower end of the second bevel gear (11) is fixedly connected to a connecting vertical shaft (12), the lower end of the connecting vertical shaft (12) is fixedly connected to a driving gear (13), the lower end of the interior of the flow equalizing chamber (4) is provided with a flow equalizing component (14), the flow equalizing component (14) comprises a fixed ring (15) and a rotating ring (16), the fixed ring (15) is located outside the rotating ring (16), the fixed ring (15) and the rotating ring (16) are rotatably connected through a bearing, the fixed ring (15) is fixed to the inner wall of the upper end cover (1), the outer surface of the rotating ring (16) is provided with an adjusting tooth portion (17) along the upper end of the fixed ring (15), and the adjusting tooth portion (17) is meshed with the driving gear (13);The middle of the rotating ring (16) is fixedly connected to an intermediate connecting disk (18), and a water leakage hole (19) is provided through the intermediate connecting disk (18). The water leakage hole (19) is eccentrically arranged, and the upper end surface of the intermediate connecting disk (18) is inclined toward the direction of the water leakage hole (19).

2. A low-energy consumption ultrafiltration membrane water purification device according to claim 1, characterized in that: The interior of the lower end cover (3) is configured as an intermediate inner cavity (6); a sewage outlet pipe (34) is installed in the second connecting column (33); one end of the sewage outlet pipe (34) extends to the interior of the sewage cavity (32); and the other end of the sewage outlet pipe (34) extends to the interior of the intermediate inner cavity (6); a sewage discharge pipe (21) is installed at the lower end of the lower end cover (3); and one end of the sewage discharge pipe (21) extends to the interior of the intermediate inner cavity (6).

3. A low-energy consumption ultrafiltration membrane water purification device according to claim 2, characterized in that: Clean water outlet manifolds (35) are installed in the cross direction inside the second connecting column (33), one end of the clean water outlet manifolds (35) extends to the inside of the clean water cavity (30), and the other end of each group of four clean water outlet manifolds (35) is commonly connected to a clean water outlet connecting pipe (36). A clean water discharge pipe (22) is installed at the lower end of the middle inner cavity (6), one end of the clean water discharge pipe (22) extends to the outside of the lower end cover (3), and the other end of the clean water outlet connecting pipe (36) on each filter element (27) is connected to the clean water discharge pipe (22).

4. The low-energy consumption ultrafiltration membrane water purification device according to claim 3, characterized in that: A tap water inlet pipe (7) is installed at the upper end of the upper end cover (1), one end of the tap water inlet pipe (7) extends to the outside of the upper end cover (1), and the other end of the tap water inlet pipe (7) extends to the inside of the flow equalization chamber (4); a tap water inlet pipe (42) is installed in the upper outer shell (37), one end of the tap water inlet pipe (42) extends to the inside of the flow equalization chamber (4), and the other end of the tap water inlet pipe (42) extends to the inside of the sewage chamber (32).

5. The low-energy consumption ultrafiltration membrane water purification device according to claim 4, characterized in that: An exhaust pipe (20) is installed at the upper end of one side of the protective shell (2), one end of the exhaust pipe (20) extends to the outside of the protective shell (2), and the other end of the exhaust pipe (20) extends to the inside of the filter chamber (5).

6. The low-energy consumption ultrafiltration membrane water purification device according to claim 5, characterized in that: A water inlet control valve (43) is installed on the water inlet pipe (42) located inside the upper outer shell (37), and the upper outer shell (37) is connected to the upper end cover (1) through a connecting ring pipe (44).

7. A working method, based on the low energy consumption ultrafiltration membrane water purification device according to claim 6, characterized in that: The steps include: Step 1: Tap water enters the flow-distributing chamber (4) through the tap water inlet pipe (7), and then passes through the filter element (27) and the tap water pipe (42) into the sewage chamber (32); Step 2: Impurities in the tap water remain in the sewage chamber (32) after being filtered by the ultrafiltration membrane (31), and then enter the middle inner chamber (6) through the sewage outlet pipe (34), and then are discharged through the sewage discharge pipe (21); the filtered clean water remains in the clean water chamber (30), and enters the clean water outlet connecting pipe (36) through the clean water outlet branch (35) on the second connecting column (33), and then is discharged through the clean water discharge pipe (22); Step 3: After filtering for a period of time, the water inlet control valve (43) on the water inlet pipe (42) in the first filter element (27) is closed to stop water from entering the filter element (27). At the same time, the air inlet control valve (26) connected to the air supply pipe (25) on the corresponding filter element (27) is opened. The air delivered by the external equipment enters the middle air filter column (23) through the air supply pipe (24), and is then delivered to the fixed air nozzle (41) through the air supply pipe (25), the air supply coil (39) and the air supply branch pipe (40). The fixed air nozzle (41) sprays high-pressure gas to clean the inner surface of the ultrafiltration membrane (31); Step 4: After the cleaning is completed by spraying high-pressure gas from the fixed gas nozzle (41), the gas passes through the ultrafiltration membrane (31) and the breathable and water-proof membrane (29) and flows into the filter chamber (5), and then is discharged to the outside through the exhaust pipe (20); Step 5: After that, the air inlet control valve (26) corresponding to the first filter element (27) is closed, and the water inlet control valve (43) is opened. The unfiltered sewage flushes the impurities downward, and the impurity-mixed wastewater enters the middle inner cavity (6) through the sewage outlet pipe (34) and is then discharged through the sewage discharge pipe (21); Step 6: Clean the interior of other filter elements (27) until the interior of all filter elements (27) is cleaned.

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