75-07: Recovery of Chromate from Cooling Tower Blowdown by Ion Exchange Resins Lightning Protection

75-07: Recovery of Chromate from Cooling Tower Blowdown by Ion Exchange Resins Lightning ProtectionDuring the past several decades, chromate based corrosion inhibitors were widely used in open cooling water recirculating systems. In 1971, the Japanese Government, however, adopted a regulation which limited the discharge of toxic matter including hexavalent chrome to public waters. Factories employing cooling systems were forced to reduce chromates to less than 0. 5 ppm as Cr^6+ or replace chromates to other types of corrosion inhibitors; however,

Proper cooling system operation depends on maintaining clean system surfaces for optimum heat transfer and system longevity

and water can be conserved if energy usage is allowed to increase

Identifying

remote and wireless sensing technology

maintenance history and efficiency comparisons will be presented

and thermal performance aspects of the various fiber-cement fill-system designs

more advanced techniques that may be used within reuse projects are discussed within this paper

In the wake of this requirement

Although they provide superior performance

and evaporative condensers

especially considering the technological advances in VFD's during the last two decades

broad-spectrum biocide with particular efficacy against algae and slime