Product Description

Inclined Drum Screen Filter for Water Treatment.

Mechanical Rotary Screen in Municipal/Industrial Wastewater Treatment

Description

Spiral Rotary Drum Screens
Spiral Rotary Drum Screens are integrated machines consisting of a drum screen, screw conveyor and compactor. Effluent enters the screen drum and solids are captured. When the drum rotates the solids fall into the spiral conveyor. The spiral feeds the screenings into a compactor where they are compressed and disposed. Screen water continues downstream. The rotating screen drum ensures screen does not blind. Filtration rates of between 1 - 7 mm are available, alongside flow rates of up to 7600 m³/h.

Construction
Housing constructed out of high quality 304 stainless steel to ensure years of trouble free operation. Spiral manufactured out of carbon steel with optional 304 stainless steel construction. Nylon cleaning brushes bolted to spiral. Spiral Rotary Drum Screens can be supplied for direct installation into a channel or as a complete package inside a stainless steel tank with or without the option of a bypass rake screen. Continuous bagging systems are available to receive screenings and abate odour, the screenings can then be sealed without any personal contact. Options for 316 Stainless steel area available.
20 Micron Stainless Steel Rotary Drum Filter

20 Micron Stainless Steel Rotary Drum Filter

Operation
Solids within the incoming flow will enter into the drum screen and progressively collect onto the screen mesh and cause it to gradually blind. The upstream water level will rise and at a predetermined level, the drum screen and screw conveyor will activate and rotate, immersing a clean section of the screen into the effluent. During rotation the solids or screenings will become inverted and then fall into the screw conveyor. Spray nozzles and a roller brush fixed to the periphery of the drum screen will clean away any residual solids from the mesh surface. The screenings are conveyed, compacted and dewatered and depending upon the solid properties, a volume reduction of around 40% DS or greater can be achieved prior to disposing the screenings into a skip or holding vessel.

A jet wash facility in the compaction zone will breakdown and remove faecal and other semi-solid or soluble mater and return it to the inlet flow. Additional jets can be installed in the transport zone to meet higher specifications of organic solids removal. Faecal matter washing efficiencies greater than 90% and screenings weight reduction of 50% can be achieved. The compactor and wash system can be omitted to suit requirements such as CSO applications where the screenings are returned to the downstream sewer.
20 Micron Stainless Steel Rotary Drum Filter

Technical parameter

Model			OA-600	OA-800	OA-1000	OA-1200	OA-1400	OA-1600	OA-1800	OA-2000
Drum diameter			600	800	1000	1200	1400	1600	1800	2000
Standard mesh length			650	850	1000	1200	1400	1500	1650	1850
Outer diameter of conveying pipe			159	219	219	273	273	325	325	325
Highest water level H3			400	520	670	820	950	1100	1250	1350
Standard installation angle			35°
Average channel depth H2			600 -800	700 -1000	900 -1200	1100 -1400	1200 -1600	1400 -1800	1600 -2000	1800 -2100
Standard slag discharging height H1			1000mm
Min.installation length A			3000	3300	3600	4000	4300	4700	5000	5300
Max. flow capacity m3/h	slot	0.5	80	135	235	315	450	585	745	920
		1	125	215	370	505	720	950	1205	1495
		2	190	330	555	765	1095	1440	1830	2260
		3	230	400	680	935	1340	1760	2235	2755
		4	235	430	720	1010	1440	2050	2700	3340
		5	250	465	795	1105	1575	2200	2935	3600