Accurate Gas Flow Measurement Improves Water Disinfection Process Efficiency

Source: Fluid Components International
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Technical Article: Accurate Gas Flow Measurement Improves Water Disinfection Process Efficiency

By Tristan J. Williams, Sr. Member Technical Staff
Fluid Components International

Many of today’s large urban water treatment plants rely upon sophisticated chlorination processes in order to provide clean, sanitary water to millions of consumers in the US and around the globe. The efficiency and cost-effective operation of chlorination processes in water treatment facilities can be significantly improved with the installation of flow meters that accurately measure the flow of chlorine gas in the treatment process.

Turning raw water obtained from various ground or surface water supplies into clean potable water fit for human consumption or industrial purposes requires the removal of contamination sources. Such sources can include algae, bacteria, fungi, minerals, parasites and viruses. Many of these contaminants are potentially dangerous or even lethal to humans. Some contaminants merely affect the taste of water and are removed to make the water more palatable.

There are three major stages of water treatment: primary treatment occurs that involves screening of water during the collection phase from ground or other sources. Secondary treatment removes fine solids and contaminants with filters and other techniques. Tertiary treatment includes disinfectant and other processes that improve taste and overall quality. Flow measurement is involved at all three stages in the process, but gas flow measurement is critical during disinfection processes that rely on chlorine gas.

The proper dosing of chlorine into the water filtration system requires precise and repeatable flow measurement of chlorine gas. Chlorine gas is a toxic gas that can be a deadly hazard to plant employees if improperly handled or if there are leaks in tanks, lines or valves. This gas is also corrosive and reacts with instrument-wetted materials over time, potentially causing oxidation and failure.

When too little chlorine is added to the water, disease problems can result that affect people’s health. When too much chlorine is added, the quality of taste can resemble a “swimming pool” flavor. To ensure the right amount of chlorine is added to water, water plant technicians continuously monitor the process and rely on flow meters for precision chlorine gas flow measurement.

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Click Here To Download:
Technical Article: Accurate Gas Flow Measurement Improves Water Disinfection Process Efficiency

SOURCE: Fluid Components International