- Scaling, Plugging & Grit Removal
- Reactivity & Consistency
- Materials, Equipment, Energy & Transportation Costs
- Environmental Problems
- Water & Wastewater Treatment
- Flue Gas Desulfurization
- Caustic Replacement
Hydrated Lime Slurry for Water Treatment
Problem: A natural gas
fired electrical power plant was using well
water from deep water wells in
Solution: In 2006, Applied Specialties, Inc. and Bromatco were awarded a contract to manufacture high calcium hydrated lime slurry, on site, from quicklime with the first year estimated calcium oxide usage of 3,400 tons. Magnesium chloride was used to offset the loss of magnesium from the dolomitic lime in the previous process. This was the maiden voyage of what in now called the Lime-Save process.
combination of additives was
employed in the quicklime slaking process to produce a high solids, low
viscosity, and non scaling hydrated lime slurry.
Water quality was improved to required standards of hardness and, with the magnesium being injected and controlled separately, silica was consistently reduced to below the minimum requirements. No downtime due to inoperative equipment was experienced.
Best of all, the plant saved hundred thousand dollars a year in water treatment costs because of lower product costs and lower lime usage. On average, less than 2,100 tons of quicklime per year was used compared to the expected 3,400 tons estimated in the first purchase order, a 38% savings. The large dry hydrated lime and magnesium oxide silos and mixing equipment were no longer needed. After 2 ½ years, no buildup on the inside of tanks or feed lines was observed.
Lime Slurry Slaking Operation at Power Plant near Phoenix, Arizona
23493 North 119th Way
Scottsdale, AZ 85255-5667
Phone: (602) 758-2815
Fax: (602) 391-2258