Tailoring pumping solutions for colloids

Tailoring pumping solutions for colloids

S EWAGE & WASTE WATER k'] D i a p h r a g m p u m p s u r p a s s e s air gun m a k e r ' s e x p e c t a t i o n s Treatment technicians at Crosm...

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WASTE WATER

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D i a p h r a g m p u m p s u r p a s s e s air gun m a k e r ' s e x p e c t a t i o n s

Treatment technicians at Crosman Corporation, recently c e l e b r a t e d a first-year anniversary. T h e i r E2P (Versa-Matic's two-inch P o l y p r o p y l e n e p u m p w i t h t h e Elima-Matic ® antistalling, non-icing, lubricationfrec air valve) and XL ThermoMatic TM Versa-Dome ~"~ diap h r a g m had b e e n in service for exactly one year - six m o n t h s longer than Ken had e x p e c t e d and nine m o n t h s longer than the best p e r f o r m a n c e of the c o m p e t itive p u m p and diaphragm. Crosman Corporation, the w o r l d ' s leading air gun manufacturer and distributor, was o n e of Versa-Matic's test sites for the Versa-Dome version of the XL Thermo-Matic diaphragm. Made from a c o m p o s i t e of materials, t h e XL T h e r m o - M a t i c , w h i c h Versa-Matic invented and introd u c e d in 1988, resists abrasives and chemicals, and e n d u r e s as long or longer than rubber diaphragms. Versa-Matic i n t r o d u c e d the XL T h e r m o - M a t i c Versa-Dome and E2P at a b o u t t h e s a m e time, a combination that Dennis

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P e l l e t i e r o f Eden A s s o c i a t e s r e c o g n i z e d as "a p e r f e c t match" for Crosman. Eden Associates is Versa-Matic's d i s t r i b u t o r in N e w York's Buffalo, R o c h e s t e r a n d S y r a c u s e areas. D e n n i s k n e w that t h e r e w e r e p r o b l e m s w i t h the t w o - i n c h plastic p u m p a n d d i a p h r a g m u s e d in a transfer application for p u m p i n g w a s t e w a t e r from four large h o l d i n g tanks into a pha d j u s t m e n t tank. W a s t c w a t e r g e n e r a t e d d u r i n g the air g u n production process contains m e t a l c o n t a m i n a n t s that m u s t bc chemically treated and r e m o v e d b e f o r e disposal. The pump that transfers Crosman's wastewater is c o m p u t e r controlled; it runs 24h o u r s a day, cycling o n and off, d e p e n d i n g o n t h e w a t e r level o f t h e tank a n d p H b a l a n c e o f t h e w a t e r . T h e i n t e r m i t t e n c y o f the transfer process and varying soil loading of t h e w a s t e w a t e r caused the competitive pump to stall frequently, often b e t w e e n 10 a n d 15 times a day, d e s p i t e the fact that t h e p u m p w a s run w i t h 30 lb o f air.

W h e n t h e p u m p stalled, often t h e storage tanks w o u l d b a c k up. In a d d i t i o n , t h e c o m p e t i t i v e p u m p a n d diap h r a g m w o r e quickly.To r e d u c e the unexpected downtime, a costly, t i m e - c o n s u m i n g preventive m a i n t e n a n c e s c h e d u l e w a s instituted, r e b u i l d i n g t h e p u m p every two months. W i t h t h e t w o - i n c h ElimaMatic p l a s t i c p u m p a n d XL Thermo-Matic Dome diaphragm, maintenance costs have b e e n significantly r e d u c e d and d o w n t i m e virtually elimin a t e d in t h e w a s t e w a t e r treatment area of Crosman. O p e r a t i n g costs are also less because the Elima-Matic requires less air. Based o n this e x p e r i e n c e , Elima-Matic air valves and o t h e r replacement parts and diaphragms have now been i n t r o d u c e d into o t h e r areas o f Crosman. Contact: Versa-Matic Pumps, 6017 Enterprise Drive, Export, PA 15632-8969, USA. Tel: +1 412 327 786; Fax: +1 412 327 4300.

Tailoring p u m p i n g s o l u t i o n s for colloids

The Customer Engineering E q u i p m e n t division o f Allied Colloids, o n e of t h e w o r l d ' s leading manufacturer of synthetic flocculants, is incorponlting specially d e s i g n e d cast iron low f l o w progressing cavity p u m p s from M o n o Pumps, into its flocculant p r e p a r a t i o n and dosing rigs installed primarily in waste w a t e r t r e a t m e n t facilities globally. Allied Colloids' UK (;ustomer Engineering E q u i p m e n t division, b a s e d in Bradford, is r e s p o n s i b l e for providing customers with the appropriate technology to ensure that the chemicals m a n u f a c t u r e d b y its p r o d u c t i o n division are utilised efficiently.

A number of pumps were r e q u i r e d to fulfil t w o m a i n d u t i e s o n t h e f l o c c u l a n t preparation a n d d o s i n g rigs; larger pumps to t r a n s f e r u p to 50 m 3 / h r o f m i x e d and aged flocculant from the mixing tanks to t h e storage tank; and smaller p u m p s for t h e a c c u r a t e d o s i n g o f f l o c c u l a n t from the storage tanks into t h e w a s t e water. To m e e t A l l i e d C o l l o i d s ' r e q u e s t s for cost-effective cast iron p u m p s r a t h e r t h a n stainless steel, Mono Pumps d e s i g n e d and m a n u f a c t u r e d a special cast iron m o d e l , n o w n a m e d t h e CB Range, w h i c h are ideal for l o w p r e s s u r e transfer duties and d o s i n g applications.

Allied Colloids p r e f e r s a progressing caviW p u m p system duc to the shear sensitive nature o f t h e p o l y m e r - b a s e d flocculants. I n c o r - p o r a t i n g a single helical rotor turning within a d o u b l e helical resilient stator, the CB Range provides a s m o o t h p u m p i n g action w h i c h ensures the integrity of thc shear sensitive polymers. Mono not only designed a n d m a n u f a c t u r e d a n e w cast iron p u m p for us, it also incorp o r a t e d several o t h e r u n i q u e d e s i g n features. For e x a m p l e , d u e to t h e c o n d i t i o n s in the w a t e r a n d p a p e r industry, t h e p u m p s w e r e s u p p l i e d for direct mounting onto a robust Renold G e a r MK02 Carter Variator to

W O R L D P U M P S JANUARY 1998

SEWAGE & WASTE

WATER

e n s u r e l o n g t e r m reliability. As an additional o p t i o n , the d r i v e unit i n c o r p o r a t e s b o t h the inverter and potentiometer, resulting in a m o r e c o m p a c t and effective package while s i m u l t a n e o u s l y r e d u c i n g installation, service a n d m a i n t e n a n c e requirements. With the ability to accommodate flows u p to 6(R) Vhr and viscosities in excess of 5000 cP, the CB Range easily handles the Allied Colloids' waster-based flocculant solution which typically has viscosities up to 3000 cP.

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Comprising three model sizes, t h e CB Range is a M o n o b l o c design, and can b c supplied driveless or with e i t h e r f i x e d o r variable s p e e d drives. A c h o i c e o f p u m p i n g a n d sealing e l a s t o m e r s m a k e it ideal for a w i d e range o f liquids w i t h varying viscosities, from c l e a n e r p r o d u c t s to m u l t i p h a s e mixtures. Contact: Mono Pumps, Martin Street, Audenshaw, Manchester M 3 4 5DQ, UK. Tel: +44 161 339 9000; Fax: +44 161 344 0727.

Critical equipment reaches Montserrat volcano evacuees

In an O c t o b e r 3, 1997, cerem o n y r e c o g n i z i n g o n e wastewater treatment equipment m a n u f a c t u r e r ' s d e d i c a t i o n and o n e n a t i o n ' s financial c o m m i t m e n t to t h e v o l c a n o - r a v a g e d island o f Montserrat, H o n o r a r y British Consul J. Scott B r o w n thanked more than 20() e m p l o y e e s o f Smith & Loveless for t h e i r r e m a r k a b l e effort to expeditiously build two w a s t e w a t e r t r e a t m e n t plants. T h e c e r e m o n y , w h i c h coinc i d e d w i t h t h e s h i p p i n g date of t h e t r e a t m e n t p l a n t s from t h e Lenexa, Kan, h e a d q u a r t e r s of Smith & Loveless, was certainly

n o t e w o r t h y to m o r e than 1800 v o l c a n o e v a c u e e s o f t h e tiny C a r i b b e a n island. U p o n installation o f t h e plants, t h e e v a c u e e s will be able to m o v e out o f c r o w d e d , t e m p o r a r y shelters in w h i c h m o s t individuals have b e e n living for m o r e t h a n a year - into new, p e r m a n c n t h o u s i n g communities. T h e British g o v e r n m e n t has s p e n t nearly $10m in building t h e s e c o m m u n i t i e s in t h e w a k e o f d e s t r u c t i v e volcanic activity that has r o c k e d the island b y killing 19 people and destroying s e v e r a l villages s i n c e 1995. I n c l u d e d in t h e

s p e n d i n g w c r c t h c 2 wastewater treatment plants purchased from Smith & Loveless. S m i t h & Loveless w a s c o n t a c t e d b y t h e multi-national e n g i n e e r i n g and c o n s t r u c t i o n firm of Brown & Root, London, England, who has been involved in o t h e r i n t e r n a t i o n a l disaster r e b u i l d i n g p r o j e c t s in s u c h p l a c e s as Somalia a n d Haiti. T h e y s e l e c t e d Smith & Loveless b e c a u s e o f its ability to m a n u f a c t u r e a n d p r o v i d e quality t r e a t m e n t e q u i p m e n t in a critically s h o r t time p e r i o d . Smith & Loveless' factorybuilt ( o r "package") design also enables the treatment plant to b e e f f i c i e n t l y i n s t a l l e d , minimizing time-consuming field-assembly and installation problems. R e p r e s e n t a t i v e s from Smith & Loveless, a 51-year-old international m a n u f a c t u r e r of w a t e r a n d w a s t e w a t e r t r e a t m e n t and transfer e q u i p m e n t , r e c o g n i z e d the British government's r e b u i l d i n g efforts b y p r e s e n t i n g B r o w n and t h e g o v e r n m e n t a c o m m e m o r a t i v e statue. Contact: Smith & Loveless, 14040 Santa Fe Trail Drive, Lenexa, Kansas 66215-1284, USA. Tel: +1 913 888 5201; Fax: +1 913 888 2173.

WORLD PUMPS JANUARY 1998