KWI supply biggest horizontal Megacell yet built to international tissue manufacturer.
KWI engineers have successfully designed and installed the biggest horizontal Megacell built to date to meet a requirement fro man international customer to treat tissue machine white-water. The Megacell H80 is designed to treat 960m3/hr process water with a suspended solids level of 5-600mg/l utilising partial flow pressurisation. The use of partial flow pressurisation is something pioneered by KWI and helps to keep capital costs minimised as the size of the equipment is smaller than when conventional recycle flow pressurisation is used. The unit uses flocculants and, when required, coagulants.
The biggest horizontal Megacell design prior to this unit could treat 720 m3/hr. The MCH 80 is a very compact design and fitted into the available space better than competitor’s equipment. The use of cold rolled stainless steel for the patented ‘U’ element design was considered a better long-term solution than competitor’s plants using plastic lamellas. Detailed technical discussions with the customer ensured confidence with KWI’s design and capabilities.
Aerated water was provided using a KWI Air Dissolving Tube (ADT) 3500 linked with a conventional centrifugal pump. The design of the mixing zone between the aerated water and process water was given special attention to ensure good mixing without risking breaking the flocs formed by the addition of polyelectrolytes - a common problem with some DAF installations.
The unit was delivered to the customer’s mill on three 12 m trucks and installed by three KWI engineers within 3 working days.
Start up went smoothly and the MCH 80 is meeting all process guarantees after being commissioned in January 2008.
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