De-alkalisation
This particular process uses a weakly acidic cation resin. This resin type is capable of removing hardness from water when it also contains alkalinity. After treatment, the water contains carbon dioxide, that can be eliminated with a degasifier tower. The cation resin is very efficiently regenerated with an acid, usually hydrochloric acid.
Reactions
Here the example of calcium:
2 R-H + Ca++(HCO3–)2 R2-Ca + 2 H+ + 2 HCO3–
and the hydrogen cations combine with the birarbonate anions to produce carbon dioxide and water:
H+ + HCO3– CO2 + H2O
The salinity has decreased. Temporary hardness is gone.
De-alkalisation is used:
· In breweries
· In household drinking water filters
· For low pressure boilers
· For cooling Tower
· As a first step before the SAC exchange in demineralisation
Benefits:
Reduce Blowdown – Alkalinity is a factor that most often dictates the amount of boiler blowdown. High alkalinity promotes boiler foaming and carryover and causes high amounts of boiler blowoff. When alkalinity is the limiting factor affecting the amount of blowdown, a dealkalizer will increase the cycles of concentrations, reducing blowdown and lowering operating costs.
Reduce Chemical Use – The reduction of blowdown by dealkalization keeps the water treatment chemicals in the boiler longer, thus minimizing the amount of chemicals required for efficient, non-corrosive operation.
Reduce Return Line Corrosion – Carbonate and bicarbonate alkalinities are decomposed by heat in boiler water, releasing carbon dioxide into the steam. This gas combines with the condensed steam in process equipment and return lines to form carbonic acid (H2CO3). This depresses the pH value of the condensate returns and results in corrosive attack on the equipment and piping.
Improve Textile Dyeing – Alkalinity may also produce non-uniform results in dyeing of textiles and other fabrics because of its effect on the pH value of the dye bath.
Improve Beverage Tastes – In beverage manufacturing, alkalinity often produces flat tastes or tends to destroy taste characteristics of flavoring extracts.
Life Technologist designed great quality of De-Alkaliser.
Manual De-Alkaliser (With Diaphragm Valves)
Manual De-Alkaliser (With MPV- multi Port Valves)
Fully Auto De-Alkaliser (Volumetric) (With Electronic Valves)
Capacity 500 LPH TO 500 Kl/Hrs
MOC SS/MS/MS Rubber Lined/ PP FRP
Feature:
· Proper Sampling Points.
· With / With out Skid Mounted
· Easy in operation
· No skill man power required
· Easy to relocate
· Plug & Play System
· Proven Technology.
· High quality design and materials of construction built to last
· Modular design capability for rapid mobilization and reduced field set-up cost
· Low maintenance – automated design and controls
· Reduced environmental footprint – low energy and chemical consumption
· Fully customizable to a variety of water sources and customer requirements
· Reliable
· Sustainable
· Economical
