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Peristaltic pump tackles troublesome pH levels at food manufacturer saving repair and downtime costs on water treatment plant

Bredel SPX50 high pressure peristaltic hose pump

High pressure peristaltic hose pump

Leading convenience food manufacturer, Greencore Group Plc, has achieved significant savings in downtime and repair costs on the water treatment plant at its Greencore Grocery site in Selby, North Yorkshire, thanks to the installation of a Bredel SPX50 high pressure peristaltic hose pump from Watson-Marlow Pumps Group.

Greencore Grocery er en af ​​Storbritanniens førende producenter af flaske / krukkepakket opskriftsprodukter, der producerer en bred vifte af både mærkevarer og kundebaserede saucer, pickles og sodavand. Rengørings- og omstillingsprocessen mellem forskellige produkter producerer en lille mængde flydende affald (madudløb). Dette kan medføre signifikante udsving i pH-niveauer, fra 4 op til 12 i nogle tilfælde. Indtil for nylig blev pH-niveauerne ved Selby korrigeret ved anvendelse af 32% kaustisk soda (natriumhydroxid - NaOH) gennem anlæggets vandrensningsanlæg, som ejes og drives af United Utilities, Storbritanniens største børsnoterede vandvirksomhed. Med Greencore ansvarlig for forbrugsudgifterne blev en cost-down øvelse påbegyndt for at søge et alternativ til NaOH.

"Greencore købmandsforretningen i Selby er en højvolumen plante, hvor der kan være mellem 10 og 26 'washouts' om dagen afhængigt af bestillingsplaner," siger Peter Wadsworth, Craft Technician hos United Utilities. "For at finde en mere omkostningseffektiv metode til at korrigere pH i forarbejdningsmaskinen, prøvede vi et produkt kaldet Mag Mex 1060, som er en magnesiumhydroxidopløsning [Mg (OH) 2] for at korrigere pH-niveauerne.

Carrier water is used to dose the Mag Mex into the system at Greencore Grocery, but to do this effectively a suitable pump is required.

“To be honest we started off using fairly ‘cheap and cheerful’ dosing pumps, but this proved to be inefficient as we spent two days a week repairing them,” says Mr Wadsworth. “Because magnesium hydroxide has low solubility in water it makes for a pretty abrasive fluid. We found the grit would attack the mechanical seals and drain plugs on the dosing pumps, thus requiring repair.”

It so happened that one of United Utilities sister sites was using a peristaltic pump from Watson-Marlow, and this was subsequently recommended to the process engineering team at Selby. As a result, a Bredel SPX50 high pressure peristaltic hose pump (50mm diameter) was installed in September 2009, and ever since there have been no abrasion issues causing downtime or repair.

The reason for this successful outcome is simple: in peristaltic pump technology, nothing but the hose or tube touches the fluid, hence there is no chance of the abrasive fluid damaging pump components. The peristaltic design means there are no valves, seals or glands to repair or replace. Replacing a hose or tube takes only minutes and they are relatively low-cost items compared to spares for other pump types.

At Greencore’s Selby site, this all adds up to a low maintenance, low cost solution, which is just as well for an operation that produces around 250 million jars per annum across circa 500 different product lines.

“Any downtime in an operation of this magnitude can be very costly,” says Mr Wadsworth. “I’m sure the SPX50 paid for itself extremely quickly. In fact we are going to trial an identical pump on site for sludge transfer between tanks.

Succesen til SPX50 hos Greencore, Selby er et tegn på et websted, der har fået betydelige investeringer i de seneste 10-år og har nu nogle af de mest moderne, hygiejniske og effektive produktionsfaciliteter i Storbritannien. Webstedet har opnået den prestigefyldte AIB-akkreditering, som er placeret i kategorien "overordnet", idet man opnår BRC Grade A. Siden leverer alle større britiske detailhandlere og eksport til over 21 lande. Over 600-folk er ansat i 23-acre Selby-fabrikken.

Watson-Marlow Fluid Technology Group

Watson-Marlow Fluid Technology Group (WMFTG) er verdens førende inden for niche peristaltiske pumper og tilhørende væskebane teknologier til fødevare-, farmaceutiske, kemiske og miljømæssige industrier

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