Defending Against Lime Scale with Military Precision

Sponsored by

NOTTINGHAM, UK, May 6, 2009 -- The Royal Military College of Science in Shrivenham, also known as Cranfield University, has long been considered a centre of academic excellence, offering the expertise of both academia and officers of the British Armed Forces in the teaching of Defence Management, Science and Technology.

The Royal Military College’s Centre for Defence Chemistry has an extensive range of well-equipped laboratories offering facilities for all aspects of teaching and research into the chemical sciences.

A regular supply of distilled water is essential in all chemistry laboratories, and the Royal Military College is no exception, with the chemistry lab producing its own distilled water from domestic water using electrically heated 10-litre stills. Being in a hard water area, the scientists at the Royal Military College found that lime scale deposits were building up rapidly on the stills, resulting in them becoming less effective.

To combat the lime scale problem, the stills were regularly dismantled, and acid was used to remove the scale from the glass vessels and heating elements. Repeated acid cleaning, however, was causing damage to the outer metal surface of each element, making it less effective and reducing its life. 

Therefore, the scientists at the Royal Military College turned to non-chemical alternatives to treat the hard water, and finding none they had tested to work effectively, the Hydroflow HS38 unit, from Hydroflow Holdings Ltd. in Nottingham, England, was recommended. The Shrivenham team decided to carry out comparative performance tests, so the distillation unit was installed on a lime scale free still and observations made over a six-week period. The still was then cleaned, re-used for a second six-week period without the Hydroflow HS38, and fresh measurements taken.

The tests confirmed that calcium carbonate crystals formed quickly on heating elements as the water contained more dissolved material than could be held, meaning it was at the point of super-saturation. In comparison, when the Hydroflow HS38 was in operation, crystals grew larger and more quickly, but crystallized onto the floating ‘Hydroflow Crystals’ and remained in suspension as opposed to adhering to the heating element or glass. Furthermore, whilst the HS38 was in use, the water was maintained at saturation point.

Hydropath’s HS38 prevents the build up of all lime scale deposits, including calcium carbonate, by emitting randomly varying electric fields throughout the system. The result is the production of nuclei throughout the water system.

When the water is heated, the resulting precipitate that usually deposits on hot surfaces grows in suspension and develops as a crystal on the nuclei, which is then washed away in the flow. The fields treat the water both up and down stream and will be transmitted into the central heating system to treat the primary water. The treated water is normally able to dissolve existing scale in just a few months.

Since the Hydroflow HS38 eliminated the need for acid cleaning and the still no longer needs to be dismantled, it saves a lot of time for the team at the Royal Military College. The units have now been permanently fitted to all their laboratory stills.
 

For information about Hydropath’s range of water conditioners, contact +44 (0) 115 986 9966 or visit www.hydroflow.com

###



Sponsored by

TODAY'S HEADLINES

CA gov issues executive order on drought; NRDC, Poseidon Water comment on action

California Governor Jerry Brown has announced an executive order that will save water, increase enforcement of wasteful water use, invest in new technologies, and streamline the permitting process for water infrastructure projects such as desalination facilities.

Hong Kong investors pave way for Dais Analytic involvement in China

SAGE Technology Investment and JHSE Technology Investment have announced the equity investment in Dais Analytic Corporation, the creation of Dais New Energy Technology, and a $60-million contract commitment to support the growth of Dais' products in Greater China.

Aqua America appoints new VP, chief environmental officer

Aqua America has announced the promotion of Michael J. Pickel, P.E., to vice president and chief environmental officer for the company.

Ovivo awarded over $20M in contracts for services in North American, European markets

Ovivo recently announced that it has been awarded two significant contracts totaling more than $20 million to provide services in North American and European markets.

FOLLOW US ON SOCIAL MEDIA