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Fiber rotary disc filter is an advanced advanced sewage treatment technology

release time:2019-12-10

Fiber rotary disc filter is an advanced advanced sewage treatment technology, which is a technology superior to other traditional processes. The core device of this device is the middle filter turntable, which is composed of 6 sectors, which is covered with filter cloth. It belongs to a plug-in structure and is particularly convenient for transportation and maintenance. The drive motor at the upper right drives the turntable to rotate; the center of the filter disk is a hollow central water collection tank; the backwash device includes a back suction suction cup and a back suction water pump; the mud discharge device includes a mud pump (also a back suction water pump), and a bucket Mud collecting tank, the porous mud discharging pipe is arranged on the bucket type collecting tank; it also includes an automatic control system (PLC automatic control panel).

The operating status of the fiber rotary filter includes: filtering, backwashing, and sludge removal.

(1) Filtration: Inward and outward, the gravity flow of sewage enters the filter, so that the filter pan is completely immersed in the sewage. A water distribution weir is set in the filter, so that the water is evenly distributed in the filter and the water inflow generates low disturbance. Sewage is filtered through a filter cloth. After the filtered liquid is collected through a hollow pipe, it is discharged out of the filter tank through a weir. During the cleaning process, filtration is still in progress. Therefore, filtering is continuous throughout the entire run.

(2) Cleaning: Part of the sludge is absorbed in the fiber wool filter cloth during the filtration, and a sludge layer is gradually formed. With the accumulation of sludge on the filter cloth, the filtering resistance of the filter cloth increases, and the water level of the filter gradually rises. The pressure sensor in the filter tank monitors the liquid level in the tank. When the liquid level in the tank reaches the cleaning set value (high water level), the PLC can start the backwash pump to start the cleaning process. Backwash time and cycle can be adjusted. The sludge on the filter cloth is discharged from the drainage system of the plant area through the back suction device and the back washing pump. The filter can be continuously filtered during cleaning.

working principle:

During the filtration, the filter turntable is in a static state, which is beneficial to the bottom sedimentation of the sludge. During cleaning, the filter turntable is rotated at a speed of 0.5 to 1 revolutions per minute. The negative pressure of the backwash water pump sucks the surface of the filter cloth, removes the sludge particles accumulated on the filter cloth, and the water in the filter turntable is sucked from the inside to the outside at the same time, which has a cleaning effect on the filter cloth. The instantaneous flushing area only accounts for about 1% of the area of the full filter turntable, and the backwashing process is intermittent.

During normal cleaning, two filter disks are used as a group. Each time a group of filter disks are cleaned, it is controlled by automatically switching the electric valve on the suction pump pipe, and the cleaning of each group is performed alternately during a complete cleaning process of the fiber disk filter. The operation of the suction pump is continuous during this time. When the quality of the incoming water suddenly deteriorates and the backwash cycle is ≤15 minutes, the system will start emergency measures and start 2 to 4 backwash pumps at the same time to backwash 2 to 4 sets of filter disks (4 to 8 disks) until The backwash cycle returned to normal.

(3) Sludge removal: A bucket bottom is set under the filter turntable of the fiber turntable filter, which is beneficial to the collection of sludge at the bottom of the pool. The sediment on the bottom of the sludge pool reduces the amount of sludge on the filter cloth, which can extend the filtration time and reduce the amount of backwash water. After a set period of time, the PLC starts the sludge pump and returns the sludge to the plant drainage system through the perforated sludge pipe at the bottom of the pond. Among them, the mud discharge interval and mud discharge duration can be adjusted.

In addition, when the treatment system in front of the filter fails, the sludge drainage system can be started to play the role of emptying the filter.


In today's society, advanced technology is the primary productive force. Advanced technology will inevitably obsolete backward technology. Fiber rotary disc filter technology is the masterpiece of this sewage treatment era. Low operating costs, good and stable effluent water quality, and a very small footprint are its most significant features. Compared with previous traditional processes, it has the following advantages:

1. The effluent water quality is good and stable, reaching the national level A standard. The backwashing intensity is 333L / m.s, and the frequency of backwashing is high. Backwashing is performed every two hours to prevent the growth of green algae and prevent the filter cloth from clogging and compacting.

2. The operating cost of the fiber rotary disc filter is very low. The operating cost of treating one ton of water is only 0.004 yuan (4%), while the operating cost of traditional processes (V-type filter, D-type filter, fiber bundle / ball filter) It is 0.2-0.3 yuan. Taking 10,000 tons of water as an example, it can save 500,000-700,000 yuan a year.

3. Compared with the traditional process, the fiber rotary disk filter eliminates the civil construction such as the blower room, the lift pump room, the chlorination room, the clear water tank, the sedimentation tank, etc., and the land area is very small. It is 1 / 6—1 / 7 of traditional craft.

4. The fiber turntable filter eliminates many structures, valves, pipelines, etc., making the maintenance and repair of the equipment simple and convenient, and the degree of automatic operation is quite high. Therefore, no special supervision is required, and the labor intensity of the workers is greatly reduced.

5. Compared with the traditional filter, the fiber rotary disc filter eliminates the need for pre-chlorination, which not only reduces the operating cost, but also avoids the unsafe hidden dangers of the workers' operation. ).

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