Water Technology - Jan 2012

PROFESSOR POU POE boiler failure For the typical 24 hour operating plant both the softeners and the dealkalizers should be alternating twins or duplexes You will require some sizing and design engineering assistance to be a vendor and service source of dealkalizers You will also need engineering assistance in the start up of your first system WT David M Bauman CWS VI CI CCO is technical editor of Water Technology and a water treatment consultant in Manitowoc Wis He received his B A from the University of Illinois in Industrial Design He can be reached by email at dp bauman@ sbcglobal net For past articles in this column and related articles go to www WaterTechOnline com and enter keyword Professor in the search box To pose a question to Professor POU POE go to www watertechonline com click Ask the Professor and follow the instructions PRODUCTS SERVICES Ultra Filtration POU system www watertechonline com 33 hydroxide NaOH is added to the salt They are extremely useful as pretreatment for feedwater of medium temperature and medium pressure boilers There are three forms of alkalinity Bicarbonate HCO3 carbonate CO3 and hydroxide OH A dealkalizers benefit is that by reducing bicarbonate it reduces the formation of carbonic acid H2CO3 This is especially important in the condensate return lines from the boiler Carbonate does not exist in neutral pH water but boiler feedwater is often fed with OH after dealkalization thereby raising the pH This raises pH where carbonate and subsequently carbonic acid will be formed if bicarbonate is not reduced or eliminated A dealkalizer is not intended to remove hydroxide alkalinity nor would it be useful Reducing bicarbonate carbonate and hence carbonic acid which is corrosive to condensate return lines reduces expensive stand the working pressure on a continuous basis This must be adhered to The burst pressure is just for background information One of our local manufacturers recently asked us if we could quote on a dealkalizer We dont know Q what this is but would like to be prepared in case it comes up again We are in a city with many large manufacturers Can you explain dealkalizers to us Dealkalizers are ion exchangers like softeners but they primarily and bicarbonate A remove sulfate SO4 HCO3 They contain anion resin and need to be preceded by a softener to prevent hardness fouling Dealkalizers are very simple to operate because they regenerate with sodium chloride although better performance is achieved when a small amount of sodium Media Resin Loader The Media Resin Loader from Automated Pure Water Inc is a simple and fast way to load a tank without the need of a funnel or water After a simple installation the vacuum will draw media out and into the tank while any dust will be drawn into the vacuum to be filtered out The loader includes these features Loads a cubic foot in 60 to 90 seconds no lifting of media bags no funnel or water needed spillage is eliminated and it can be used on 25 inch or 4 inch threads Automated Pure Water Inc Circle 110 Winix Inc a global manufacturer of air and water filtration products is set to introduce its first FINECEL Ultra Filtration POU system in the U S Responding to a growing need for high performance POU filtration without producing wastewater FINECEL combines the highest quality UF membrane with highly effective carbon block filtration with style and smart features not found in this category before FINECEL is NSF 53 and 42 certified Winix Inc Circle 112 Mineral Extractor The mineral extractor from Automated Pure Water Inc is designed to be used on chambered tanks with a fixed riser tube The offset center shaft slides along the side of the stationary tube Included is a Cap Removal Tool which is used to remove the plugs that separate the different chambers from each other Also included is a lower chamber extension for the removal of media from the lower chambers if necessary The Cap Removal Tool can also be used as a refill tube by removing the handle and using a funnel inside the tube to wash in the new media Automated Pure Water Inc Circle 111