Group: Alfa Laval
Catalog excerpts
Applications The WS design is used for sludge dewatering in a wide range of industrial paint waste, surface treatment and waste oil applications. Ideal for medium-capacity installations WS decanter centrifuges are designed to be efficient, simple to install, easy to maintain and straightforward to operate. Installation, operating and service life costs are minimal. The WS range features • fully enclosed process sections • critical parts made of wear-resistant material • high performance combined with low energy consumption. Benefits • recycling of liquids • reduces sludge volume, which cuts down on transport and disposal costs • continuous operation • compact, modular design saves space • low installed power reduces electricity consumption. Working principle Separation takes place in a horizontal cylindrical bowl equipped with a screw conveyor (see drawing on page two). The feed enters the bowl through a stationary inlet tube and is accelerated smoothly by an inlet distributor. The centrifugal force that stems from the rotation then causes sedimentation of the solids on the wall of the bowl. The conveyor rotates in the same direction as the bowl, but at a different speed, thus moving the solids towards the conical end of the bowl. The cake leaves the bowl through the solids discharge openings into the casing. Separation takes place throughout the entire length of the cylindrical part of the bowl, and the clarified liquid leaves the bowl by flowing over adjustable plate dams into the casing. WS 40, 60 High-performance decanter ALFA LAVAL is a trademark registered and owned by Alfa Laval Corporate AB. EFU00030EN_WS40_60.qxd 06-09-01 11.28 Sida 1 — www.fotoskrift.se —
Open the catalog to page 1Process optimization WS decanter centrifuges can be adjusted to suit specific requirements by varying the • bowl speed to obtain the required G-force for optimized separation • conveying speed for optimized balance between liquid clarity and solids dryness • pond depth in the bowl for optimized balance between liquid clarity and solids dryness • feed rate – WS decanter centrifuges are designed to handle a wide range of flow rates. Design The rotating part of these decanter centrifuges is mounted on a compact, in-line frame, with main bearings at both ends. Vibration dampers are placed under...
Open the catalog to page 2Technical data WS 40 WS 60 Bowl diameter 353 mm (13.9 in.) 450 mm (17.7 in.) Bowl length 1460 mm (57.5 in.) 1910 mm (75.2 in.) Bowl speed max. 4000 rpm 3250 rpm G-force max. 3157 2657 Weight 2200 kg (4850 lbs) 3800 kg (8380 lbs) Installed power 22–56 kW (30–75 hp) 50–80 kW (67–107 hp) Sound pressure level* 82 dB(A) re. 20 ìPa 79 dB(A) re. 20 ìPa * Declared A-weighted emission sound pressure level in free field over a reflecting plane at 1 metre (39.4 inches) distance from the decanter operating at maximum bowl speed, tested with water and closed outlet. Dimensions WS 40 3272 mm (129 in.)...
Open the catalog to page 3EFU00030EN 0609 Alfa Laval reserves the right to change specifications without prior notification. ALFA LAVAL is a trademark registered and owned by Alfa Laval Corporate AB. How to contact Alfa Laval Up-to-date Alfa Laval contact details for all countries are always available on our website at www.alfalaval.com EFU00030EN_WS40_60.qxd 06-09-01 11.28 Sida 4 — www.fotoskrift.se —
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