Project: EDAR VILADECAVALLS
Flow rate: Qmáx 75m3/h.
Equipment: FineTech fine sieve®Nw60 (1ud).
Netwater Technology has supplied a FineTech®Nw60 fine sieve, to improve the performance of the WWTP and replace the fine grinding system that they had installed, which was a screw sieve:
Netwater Technology, has managed to meet the needs of our client. In this work they had a screw sieve installed, which was not capable of extracting the small stones that accumulated in the lower part of the sieve. These stones were nailed between the brush and the plate that forms the helical thread of the worm screw This led to a breakage of the brushes quite frequently and that the perforated filter mesh of the screen was not cleaned at all. This anomaly affected the filtration capacity of the screw screen, producing overflows of the channel. We must be noted that the replacement of the brush had some difficulty because it was inside the channel in the submerged area and the access for its replacement was difficult.
The supplied FineTech®Nw60 fine sieve is a disruptive technology very different from the screw sieve. The filter mesh is made up of modular filter panels, which are screwed by 4 screws to the standardized conveyor chain. Through this unique and patented design by Netwater of the filtration mesh, it represents a great logistical saving and we simplify maintenance tasks in case the filtration mesh has to be replaced, since the customer only has to remove 4 screws to be able to extract the filter panel that may have been damaged and have a replacement panel to proceed with its installation.
In case of the FineTech®Nw60 fine sieve, when the filter mesh is clogged, the water level rises upstream of the sieve and then the level float emits an electrical signal that activates the main motor-reducer that rotates the filter mesh. The clogged panels begin to move towards the upper area where a spray cleaning system and a cleaning brush are installed, these 2 systems have the function of cleaning and detaching the residues adhered to the filter panels and unloading them in the basket of waste collection.
One of the great advantages of having installed a FineTech®Nw60 fine sieve is all the moving parts that may be subject to some wear and tear are located on the upper part of the equipment. This entails lower maintenance and operating costs.