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Simple and safe disinfectant production
PPLICATIONS
w o o d e n artefacts, is s p r a y e d c o n t i n u o u s l y o n t o the wreck. The c o n s t a n t , even flow provided by the Mono p u m p s is crucial to the project's success since e x p o s u r e to air poses the t h r e a t of physical d i s t o r t i o n due to u n c o n t r o l l e d drying. All the Mono p u m p s feature the u n i q u e 'Flexishaft' which links the drive shaft to t h e helical rotor. S c i e n t i s t s w o r k i n g on t h e m a m m o t h preservation project designed an intricate spray system with two Mono E122 p u m p s at its heart. The pumps, o p e r a t i n g in d u t y / s t a n d b y mode at speed of 279 r e v / m i n recirculate 2000 litres of PEG per minute. A large open s e t t l e m e n t t a n k feeds the PEG solutions, with a viscosity of u p to 14 cST, to t h e Mono p u m p s w h i c h pump the PEG solution t h r o u g h a filter a n d into the spray system. The spray system comprises 380 nozzles p o s i t i o n e d at one m e t r e intervals a r o u n d the Mary Rose h u l l e n s u r i n g t h a t t h e wreck's entire surface is covered by a film of preservative. the excess solution falls onto a special c a t c h m e n t tray b e n e a t h the hull which feeds the settlem e n t t a n k ready for filtering a n d re-circulation. The filtered solution is m a i n t a i n e d at t e m p e r a t u r e s of 1823°C by h e a t i n g or c o o l i n g systems using four smaller Mono p u m p s . This t e m p e r a t u r e c o n t r o l is e s s e n t i a l for t h e controlled a b s o r p t i o n or PEG into the wood cell structure. Mono P u m p s worked closely on the Mary Rose project with m e c h a n i c a l seals m a n u f a c t u r e r J o h n Crane a n d Leroy Somer, drive supplier. The wreck was raised from the The Solent, j u s t off Portsm o u t h in 1982 a n d the conserv a t i o n project, n o w involving the six Mono p u m p s , is expected to take a total of twenty years, by which time the ship's t i m b e r s will be fully preserved.
Contact: Mono Pumps I.td, PO Box 14, Martin Street, Audenshaw, Manchester, M34 5DQ, UK. Tel: + 44 61 339 9000; Fax: + 44 61 344 0727.
i
Simple and safe disinfectant production
ProMinent 'a: has developed new Bello Zon ':~; s y s t e m s for t h e p r o d u c t i o n a n d m e t e r i n g of c h l o r i n e dioxide. With t h e s e systems only sufficient chlorine dioxide is p r o d u c e d a n d dosed to the c o n s u m p t i o n p o i n t as is required at the p a r t i c u l a r time. There is no expensive stocking of the relatively u n s t a b l e chlorine dioxide. F u r t h e r safety considerations, simple handling a n d ease of servicing were the m a i n c o n s i d e r a t i o n s in t h e f u r t h e r d e v e l o p m e n t of t h i s system which has already proved itself in m a n y areas. Areas of a p p l i c a t i o n i n c l u d e • d i s i n f e c t i o n of d r i n k i n g water, • bottle cleaning a n d the treatm e n t of water v a p o u r in the milk industry, • disinfecting of process cooling water. With the new systems, the reactor, m e t e r i n g p u m p s a n d control system are m o u n t e d on a plastic console a n d wired up ready for operation. The reactor is fitted in a n enclosed h o u s i n g with a suction device. G a m m a series m e t e r i n g p u m p s are used. Precise dosing a n d c o m p r e h e n sive electronic control facilities are the m a i n objectives of this development. In practice, this m e a n s a higher degree of safety in p l a n t operation. The control of the Bello Zon systems has b e e n c o m p l e t e l y redeveloped. The system is microprocessor based a n d can be c o n t r o l l e d either using a preselected dosage q u a n t i t y or relative to a control variable. A version with a n RS232 i n t e r f a c e will be available n e x t year. The o p e r a t o r is informed of t h e a c t u a l r a t e of flow a n d i n s t a n t a n e o u s dosage a m o u n t by m e a n s of an a l p h a n u m e r i c display. This display is available as required in five languages: German, English, French, Italian a n d Spanish. Level m o n i t o r i n g of the chemicals c o n t a i n e r s is e n h a n c e d by a p r e a l a r m which gives the
o p e r a t o r early w a r n i n g of a lack of chemicals. Bello Zon systems are n o t a universal solution to all prob l e m s b u t they do cover most cases where the use of chlorine is n o t r e c o m m e n d e d due to its known byproducts (the formation of THM or chlorophenols). A higher pH (above pH 8) or t h e p r e s e n c e of a m m o n i u m (NH4 +) in water leads to a higher c o n s u m p t i o n of chlorine. Where chlorine dioxide is used the c o n s u m p t i o n of the d i s i n f e c t a n t is considerably reduced u n d e r these c o n d i t i o n s due to its different mode of reaction. It is u s e d e v e r y w h e r e in systems where high microbiological a n d ecological r e q u i r e m e n t s have to be met. The ease of use as well as the high degree of o p e r a t i n g safety of the system r e p r e s e n t s a g e n u i n e alternative to o t h e r methods.
Contact: ProMinent Dosiertechnik GmbH, Postfach 101760, D-69007 Heidelberg, Germany. Tel: + 4 9 62 21 8420; Fax: + 49 62 21 842 413.
WORLD PUMPS JANUARY 1995
w o o d e n artefacts, is s p r a y e d c o n t i n u o u s l y o n t o the wreck. The c o n s t a n t , even flow provided by the Mono p u m p s is crucial to the project's success since e x p o s u r e to air poses the t h r e a t of physical d i s t o r t i o n due to u n c o n t r o l l e d drying. All the Mono p u m p s feature the u n i q u e 'Flexishaft' which links the drive shaft to t h e helical rotor. S c i e n t i s t s w o r k i n g on t h e m a m m o t h preservation project designed an intricate spray system with two Mono E122 p u m p s at its heart. The pumps, o p e r a t i n g in d u t y / s t a n d b y mode at speed of 279 r e v / m i n recirculate 2000 litres of PEG per minute. A large open s e t t l e m e n t t a n k feeds the PEG solutions, with a viscosity of u p to 14 cST, to t h e Mono p u m p s w h i c h pump the PEG solution t h r o u g h a filter a n d into the spray system. The spray system comprises 380 nozzles p o s i t i o n e d at one m e t r e intervals a r o u n d the Mary Rose h u l l e n s u r i n g t h a t t h e wreck's entire surface is covered by a film of preservative. the excess solution falls onto a special c a t c h m e n t tray b e n e a t h the hull which feeds the settlem e n t t a n k ready for filtering a n d re-circulation. The filtered solution is m a i n t a i n e d at t e m p e r a t u r e s of 1823°C by h e a t i n g or c o o l i n g systems using four smaller Mono p u m p s . This t e m p e r a t u r e c o n t r o l is e s s e n t i a l for t h e controlled a b s o r p t i o n or PEG into the wood cell structure. Mono P u m p s worked closely on the Mary Rose project with m e c h a n i c a l seals m a n u f a c t u r e r J o h n Crane a n d Leroy Somer, drive supplier. The wreck was raised from the The Solent, j u s t off Portsm o u t h in 1982 a n d the conserv a t i o n project, n o w involving the six Mono p u m p s , is expected to take a total of twenty years, by which time the ship's t i m b e r s will be fully preserved.
Contact: Mono Pumps I.td, PO Box 14, Martin Street, Audenshaw, Manchester, M34 5DQ, UK. Tel: + 44 61 339 9000; Fax: + 44 61 344 0727.
i
Simple and safe disinfectant production
ProMinent 'a: has developed new Bello Zon ':~; s y s t e m s for t h e p r o d u c t i o n a n d m e t e r i n g of c h l o r i n e dioxide. With t h e s e systems only sufficient chlorine dioxide is p r o d u c e d a n d dosed to the c o n s u m p t i o n p o i n t as is required at the p a r t i c u l a r time. There is no expensive stocking of the relatively u n s t a b l e chlorine dioxide. F u r t h e r safety considerations, simple handling a n d ease of servicing were the m a i n c o n s i d e r a t i o n s in t h e f u r t h e r d e v e l o p m e n t of t h i s system which has already proved itself in m a n y areas. Areas of a p p l i c a t i o n i n c l u d e • d i s i n f e c t i o n of d r i n k i n g water, • bottle cleaning a n d the treatm e n t of water v a p o u r in the milk industry, • disinfecting of process cooling water. With the new systems, the reactor, m e t e r i n g p u m p s a n d control system are m o u n t e d on a plastic console a n d wired up ready for operation. The reactor is fitted in a n enclosed h o u s i n g with a suction device. G a m m a series m e t e r i n g p u m p s are used. Precise dosing a n d c o m p r e h e n sive electronic control facilities are the m a i n objectives of this development. In practice, this m e a n s a higher degree of safety in p l a n t operation. The control of the Bello Zon systems has b e e n c o m p l e t e l y redeveloped. The system is microprocessor based a n d can be c o n t r o l l e d either using a preselected dosage q u a n t i t y or relative to a control variable. A version with a n RS232 i n t e r f a c e will be available n e x t year. The o p e r a t o r is informed of t h e a c t u a l r a t e of flow a n d i n s t a n t a n e o u s dosage a m o u n t by m e a n s of an a l p h a n u m e r i c display. This display is available as required in five languages: German, English, French, Italian a n d Spanish. Level m o n i t o r i n g of the chemicals c o n t a i n e r s is e n h a n c e d by a p r e a l a r m which gives the
o p e r a t o r early w a r n i n g of a lack of chemicals. Bello Zon systems are n o t a universal solution to all prob l e m s b u t they do cover most cases where the use of chlorine is n o t r e c o m m e n d e d due to its known byproducts (the formation of THM or chlorophenols). A higher pH (above pH 8) or t h e p r e s e n c e of a m m o n i u m (NH4 +) in water leads to a higher c o n s u m p t i o n of chlorine. Where chlorine dioxide is used the c o n s u m p t i o n of the d i s i n f e c t a n t is considerably reduced u n d e r these c o n d i t i o n s due to its different mode of reaction. It is u s e d e v e r y w h e r e in systems where high microbiological a n d ecological r e q u i r e m e n t s have to be met. The ease of use as well as the high degree of o p e r a t i n g safety of the system r e p r e s e n t s a g e n u i n e alternative to o t h e r methods.
Contact: ProMinent Dosiertechnik GmbH, Postfach 101760, D-69007 Heidelberg, Germany. Tel: + 4 9 62 21 8420; Fax: + 49 62 21 842 413.
WORLD PUMPS JANUARY 1995