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Fiber rotary filter (rotary disc filter)

  • Rotary disc filter
Rotary disc filter

Rotary disc filter

  • Product description: Wide application areas Upgrading and reconstructing of the current sewage treatment factory: Emission standard is raised from 1st class B level to 1st class A level. Recycle water from industria
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Wide application areas

Upgrading and reconstructing of the current sewage treatment factory: Emission standard is raised from 1st class B level to 1st class A level.

Recycle water from industrial production: recycling cooling water in steel plant and power plant.

Recycling of urban non-drinking water

Water for paper-making and printing and dyeing industry

Water treatment in aquaculture, etc.


Working principle of equipment


Raw water enters center drum through center water inlet pipe and then enters the filter disk fixed around the drum through the holes at the center drum. The two sides of filter disk is installed with filter cloth woven by stainless steel wire or polyester filament. Raw water becomes clean water and flows out of filter disk after filtration by cloth and discharges from effluent weir. With the process of filtration, impurities in the inner side of filter cloth increase and the clean water which flows from the filter disk decreases gradually. Water level in the disk increases. When the liquid level reaches the set value inside the filter disk, the drum starts to rotate and when the high-pressure water provided by reverse flushing device washes the filter disk surface, impurities will fall into the sewage collection trough fixed in the filter and then enter dredge pipe for discharge. With the progress of washing, water level inside the disk reduces continuously. When it reaches at the set liquid level, reverse flushing will stop automatically and drum will stop rotating. The system then reenters static filtration process.

Reverse-flushing stage will not influence operation of equipment. Filter will operate by continuous water inflow, step-by-step reverse flushing and continuous water outflow.



Figure 1 : Structure and operation principle of filter disk


It is equipped with a “to-be-filtered” device which collects flocculation pool water. The material is 304 stainless steel and it is connected to center water distribution drum.


Central water inflow and distribution equipment



It is equipped with a central inflow pipe, water drum, gearing, drive chain, rolling bearing and sealing element and other accessories. The upper end of central water distribution drum is equipped with a collection sewage tank. All main parts are made of 304 stainless steel.


Filter cloth and filter disk

Each filter disk is made up of 14 independent fan shards and is installed around the center drum. Both sides of fan shard are installed with filter cloth woven by stainless steel wire or polyester filament. Special assembled structure of fan frame enables each fan shade to be moved up easily for replacement instead of using any special tools. The connection part between filter cloth and fan frame is impermeable to guarantee good filtration result.


Reverse flushing system

Reverse flushing system uses high pressure pump to flush the filter cloth from outside to inside so that the impurities stored inside the filter cloth can be removed. In order to ensure good cleaning effect, we use umbrella-shape high-speed injection system with resistance to high pressure.


Reverse flushing system can be manually operated and its reverse-flushing times and period can be adjusted and controlled automatically by liquid level. It will not influence the filtration procedures in normal cleaning process.


Reverse-flushing system consists of reverse-flushing device, security filter, sewage collection trough, sludge discharge pipe and reverse-flushing pump.


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