Power Industry - Case Studies

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A Midwestern Power Utility Controls Zebra Mussels in its Service Water System with Chlorine Dioxide

This facility located on the Mississippi River had a serious zebra mussel infestation in its service water system. Previous chemical treatments of the system were largely unsuccessful and had provided only marginal relief from the problem. Several valves in the system had become completely plugged and were non-functional. A new and effective approach was required to resolve this costly problem.

Award Winning Recycled Water Plant Relies on Memcor Low-Pressure Membrane Technology

In 2006, fast growing South-eastern Queensland, Australia, faced severe water shortages. Drought and population increases resulted in Level 5 water restrictions for much of the region. They needed a solution to ensure an alternative sustainable source of purified recycled water (PRW) to supplement water supplies for the Swanbank Power Station for use in the cooling process, thus reducing demand on the region’s drinking water supply

Chlorine Dioxide Controls Zebra Mussels and Improves Heat Transfer

This Northern electrical utility operates a fossil fuel plant on the Mississippi River and uses 250-300 million gallons per day of water for once through cooling. Over time, this facility became progressively infested with zebra mussels. Although no restrictions in the water flow had been measured, plant personnel took a proactive approach to prevent further infestation.

Chlorine Dioxide Decreases Plant Operating Costs and Improves Heat Exchanger Efficiency

This Midwestern power utility produces 200 megawatts of electricity from one 2400 psig coal-fired boiler. The plant can sell all of the power it generates. It is critical that the heat exchangers are kept free of any heat-transfer limiting biofilm. The process is cooled using a once-through system utilizing 170,000 gallons per minute. Microbiological control of this cooling system had historically been a problem due to wastewater discharges from a food processing plant upstream of the plant, discharging wastewater with a high microbiological nutrient loading. Chlorine gas fed continuously was required to maintain control of the system.

CMS Livingston Generating Station Relies on Demineralized Water System and Mobile Services from Siemens Water Technologies for High-Purity Water

CMS Energy needed to design and build a water treatment system to feed the turbines at the 155-megawatt Livingston Generating Station. The system had to withstand extreme cold and satisfy stringent environmental regulations. It also needed to meet a peaking station's intermittent need for reliable demineralized water.

Controls Upgrade For Michigan Utility

High-purity water is essential for producing steam that will not scale turbine blades with silica, minerals and other contaminants. In 1981, a mixed bed deionizer was purchased by a Michigan utility to produce the type of high-purity water required by the coal-fired electric generating station. The mixed bed deionizer was equipped with an electro-mechanical timer-relay controller.

Cooling Tower Blowdown Treated to Reach New NPDES Permit Levels

A utilities company in Texas discharged their cooling tower blowdown to a surface water source. New NPDES permit levels were enacted and the discharge now contained copper levels in excess of the new limit.

Cyanide Contamination at Manufactured Gas Plant Treated With Wastewater Ion Exchange Service

A large east coast utility contacted Siemens Water Technologies for assistance in treating cyanide contamination in their groundwater. The contamination occured as a result of production by a former manufactured gas plant (MGP) which previously resides at the location. Residual contamination at the site contained many organic compounds and heavy metal cyanide complexes that exceeded discharge requirements to an adjacent river.

Deaerating Heaters Provide Corrosion Protection For Piping, Pumps, Boilers And Return Lines

A Northeastern manufacturing facility was experiencing severe corrosion in their steam condensate system. A Permutit® deaerating heater was provided to protect the piping, pumps, boilers and return lines from dissolved oxygen, free carbon dioxide and other corrosive non-condensable gases.

Energy Producer Chooses Mobile Deionization for Pilot Study

An east coast mega-city's energy company provides steam as a means of heating and cooling the city's buildings through underground piping. Originally, raw water which is converted to steam was treated by the the company's own deionization (DI) treatment plant. As a result of safety concerns regarding the transportation and handling of acid and caustic chemicals used in the treatment plant, the company decided to converted the cation vessels to zeolite softeners.

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