Water-saving central shaft microfilter

Abstract

The water-saving central shaft microfiltration unit consists of a frame, hollow shaft, drive motor, drum, filter screen, sludge collection tank, and air-water backwash assembly. Water to be treated enters the inlet chamber through the inlet pipe, then enters the drum through the open wheel inlet. After being filtered by the filter module, the clean water flows out of the drum, into the outlet chamber, and is discharged through the overflow port. Solid particles or suspended viscous liquid are trapped by the filter module and adhere to the inner wall of the filter membrane. The drum rotates around the hollow shaft under the action of the drive motor, and the trapped solid particles and suspended viscous liquid are carried to the top of the sludge collection tank by the rotation of the drum. They are then blown off by high-speed air jets from the backwash nozzles and enter the sludge collection tank. The equipment periodically activates the backwash water cleaning mode. High-pressure water enters the backwash pipe through the high-pressure water pipe and the air-water tee, and is sprayed out from the backwash nozzles. While cleaning the filter membrane, it also flushes away the sludge in the sludge collection tank. The backwash water carrying the sludge enters the hollow shaft through the connecting pipe and is finally discharged through the drain pipe. This air-water combined self-cleaning mode greatly saves water consumption and reduces the pressure on subsequent wastewater treatment. This invention can be applied to various fields requiring solid-liquid separation processes, such as chemical industry, pharmaceutical industry, medical industry, brewing industry, beverage industry, edible oil industry, river and lake management, and industrialized aquaculture.

Description

Technical Field

[0001] With the growth of my country's economy, there is an urgent need for a solid-liquid separation device with high flow rate, low energy consumption, stable structure, durability, self-cleaning function, and no need to replace filter media in fields such as chemical industry, pharmaceutical industry, medical industry, brewing industry, beverage industry, edible oil industry, river and lake management, and industrialized aquaculture. Background Technology

[0002] Traditional microfiltration drums employ a single-bearing structure, with the closed end of the drum driven by a bearing, while the open inlet end uses a hollow ring supported by two or three rollers. This structure has the following drawbacks: 1. Poor assembly precision: The bearing and the hollow ring supported by the rollers cannot achieve coaxiality during assembly, resulting in uneven stress on the bearing end and easy damage. 2. The inner ring skeleton of the drum, which mates with the rollers, is hollow and lacks central support, resulting in poor overall strength. Prolonged operation makes it prone to deformation, further deteriorating coaxiality. 3. The hollow inner ring of the drum has a large diameter and thin walls, making it difficult to guarantee perfect roundness during machining. Non-perfectly round workpieces undergoing rotational motion consume significant kinetic energy and affect equipment stability. All these defects lead to shortened drum life, increased equipment energy consumption, and unstable operation. Furthermore, once this structure is damaged, it is almost impossible to repair. Additionally, the backwashing self-cleaning mode used in traditional microfiltration machines consumes a huge amount of water, resulting in equally high pressure on the wastewater treatment process. Summary of the Invention

[0003] like( Figure 1 The present invention comprises: 1 open wheel rim, 2 closed wheel rim, 3 supporting rib ring, 4 filter membrane assembly, 5 hollow shaft, 6 bearing one, 7 bearing seat, 8 bearing two, 9 sealing strip, 10 sealing strip seat, 11 sludge collection tank, 12 connecting pipe, 13 implant block, 14 frame, 15 compartment cover, 16 drive motor, 17 partition, 18 open wheel rim water inlet, 19 backwash pipe, 20 backwash nozzle, 21 connecting strip, 22 sprocket, 23 chain, 24 air-water tee, 25 backwash water inlet pipe, 26 backwash air inlet pipe, 27 screw, and 28 shaft seat.

[0004] like( Figure 2 The filter drum of this invention adopts a double bearing and central shaft design. The open wheel ring (1) at the water inlet is an open structure with bearing 2 (8) installed in the center, through which the water to be treated flows in; the closed wheel ring (2) is a closed structure with bearing 1 (6) installed in the center; the open wheel ring (1), the supporting rib ring (3), and the closed wheel ring (2) form the internal support structure of the drum, and the slots of the above parts are connected by connecting strips (21) and fixed with screws (27). Bearing 1 (6) and bearing 2 (8) are connected by a hollow shaft (5) to form a complete drum frame; the filter membrane assembly (4) is installed outside the drum frame.

[0005] like( Figure 3The open rim (1) has an open structure. The outer edge of the rim is connected to the center circle by spokes. The center of the open rim (1) is equipped with a bearing seat (7). The bearing seat (7) is equipped with a bearing (8) in the inner hole and a sprocket (22) on the outer edge.

[0006] like( Figure 4 The self-cleaning system of this invention adopts a design of air and water from the same source. The backwash water inlet pipe (25) and the backwash air inlet pipe (26) are connected to the air-water tee (24). The air-water tee (24) is connected to the backwash pipe (19). Several backwash nozzles (20) are installed on one side of the backwash pipe (19). The sludge collection tank (11) is connected to the hollow shaft (5) through the connecting pipe (12). The hollow shaft (5) is installed on the frame (14) through the shaft seat (28).

[0007] like( Figure 5 The filter module adopts in-mold assembly technology, in which the filter membrane (4-1) is implanted into the plastic skeleton (4-2). Detailed Implementation

[0008] like( Figure 6 The water to be treated enters the water inlet chamber (37) through the water inlet pipe (34), enters the inside of the drum through the water inlet (18), is filtered by the filter module (4), and the clean water flows out of the drum and is discharged through the water outlet chamber (38) and the overflow port (39). Solid particles or suspended mucus are intercepted by the filter module (4) and adhere to the inner wall of the filter membrane (4-1).

[0009] Compressed air is controlled by a solenoid valve (30) through an air pipe (31) and is ejected from the backwash nozzle (20) via an air-water tee (24) and a backwash pipe (19).

[0010] The drum rotates around the hollow shaft (5) under the action of the drive motor (16). The trapped solid particles and suspended mucus are moved to the top of the collection tank (11) as the drum rotates. The solenoid valve (30) opens, and the air ejected at high speed by the backflushing nozzle (20) blows off the trapped dirt and enters the collection tank.

[0011] The system is periodically switched to backwash cleaning mode to clean the sludge in the collection tank (11). High-pressure water flows through the high-pressure water pipe (33), through the check valve (32) and the air-water tee (24), and enters the backwash pipe (19) before being sprayed out from the backwash nozzle (20). While cleaning the filter membrane, the sludge in the collection tank (11) is flushed away. The backwash water carries the sludge through the connecting pipe (12) into the hollow shaft (5), and is finally discharged through the drain pipe (35). Attached Figure Description

[0012] Figure 1 Here is a cross-sectional view of the water-saving central shaft microfiltration unit.

[0013] Figure 2 For: Roller diagram.

[0014] Figure 3 Here is a structural diagram of an open wheel rim assembly.

[0015] Figure 4 Diagram of backwash cleaning system.

[0016] Figure 5 Here is a structural diagram of the filter module.

[0017] Figure 6 Here is a simplified diagram of the implementation method.

Claims

1. A water-saving central shaft microfilter, comprising a frame (14), a hollow shaft (5), a drive motor (16), a drum, a filter screen (4), a sludge collection tank (11), and an air-water combined backwash assembly; the water to be treated enters the water inlet chamber (37) through the water inlet pipe (34), and enters the inside of the drum through the water inlet of the open wheel ring (1), and after being filtered by the filter module (4), the clean water flows out; solid particles or suspended viscous liquid are intercepted by the filter module (4) and adhere to the inner wall of the filter membrane, and the drum rotates around the hollow shaft (5) under the drive of the drive motor (16). The trapped solid particles and suspended mucus are rotated to the top of the sludge collection tank (11) and blown off by the compressed air sprayed from the backwash nozzle (20) and enter the sludge collection tank (11). The equipment starts the backwash water cleaning mode at regular intervals. High pressure water enters the backwash pipe (19) through the high pressure water pipe (33) and the air-water tee (24) and is sprayed out from the backwash nozzle (20). While cleaning the filter membrane (4-1), the sludge in the sludge collection tank (11) is flushed away. The backwash water carries the sludge and enters the hollow shaft (5) through the connecting pipe (12) and is finally discharged through the drain pipe (35).

2. The roller according to claim 1, characterized in that: The filter drum adopts a double bearing, central shaft design. The open wheel ring (1) at the water inlet end has an open structure, with bearing 2 (8) installed in the center; the closed wheel ring (2) has a closed structure, with bearing 1 (6) installed in the center; the open wheel ring (1), the support rib ring (3), and the closed wheel ring (2) form the internal support structure of the drum. The connecting strip (21) connects the above parts and is fixed with screws (27). Bearing 1 (6) and bearing 2 (8) are connected by a hollow shaft (5) to form a complete drum frame; the filter membrane assembly (4) is installed on the outside of the drum frame.

3. The open rim (1) according to claim 2, characterized in that: The open rim (1) has an open structure. The rim is connected to the outer circle and the center circle (1-2) by spokes (1-1), and the space formed therein is a water passage space. The center of the open rim (1) is equipped with a bearing seat (7), the inner hole of the bearing seat (7) is equipped with a bearing (8), and the outer edge is equipped with a sprocket (22).

4. The hollow shaft (5) according to claim 2, characterized in that: The hollow shaft (5) is a hollow structure with one end closed. The hollow shaft (5) has holes in its wall and functions as both a sewage discharge shaft and a central shaft.

5. The filter module (4) according to claim 2, characterized in that: The filter membrane module adopts in-mold assembly technology, in which the filter membrane (4-1) is implanted into the plastic skeleton (4-2).

6. The air-water combined backflushing assembly according to claim 1, characterized in that: The backwash structure adopts the same source of air and water. The backwash water inlet pipe (25) and the backwash air inlet pipe (26) are connected to the air-water tee (24) at the same time. The backwash water or air is sprayed out from the backwash nozzle (20) through the backwash pipe (19). The dirt falls into the dirt collection tank (11) and is discharged through the connecting pipe (12) and the hollow shaft (5).

7. The backflush intake pipe (26) according to claim 6, characterized in that: The backflush intake pipe (26) uses compressed air as its air source and has an independent control switch.

8. The backflushing inlet pipe (25) according to claim 6, characterized in that: The backflush inlet pipe (26) is a high-pressure water source and has an independent control switch.

9. The air-water combined backflushing assembly according to claim 6, characterized in that: The system normally operates in air-blowing cleaning mode, and can be switched to water-flushing mode as needed.

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