EnviroChemie can reduce blowdown

What is blowdown – and how is it dealt with?

Evaporation coolers effectively dissipate heat. To be able to do this, they require sufficient quantities of fresh water. The requisite volume of water is dictated substantially by the process known as thickening of the circulation water. During heat dissipation, pure water evaporates while the soluble salts remain in the circulating water and thicken it. As this cannot continue to function endlessly, some of the water must be replaced. The resulting wastewater is called blowdown. The thickening factor describes the degree of concentration of the soluble salts in the water following the evaporation of pure water.

The most cost-efficient way to operate an evaporation cooler is with the highest possible level of thickening and only minor quantities of wastewater and top-up water. Having said that, too strong a concentration can lead to deposits from hardeners, corrosion from neutral salts such as chlorides or sulphates, or sludge from solids. In addition, nutrient input encourages the growth of bacteria and algae, which also makes regular flushing necessary.

Effective treatment chemicals can negate the adverse influences of this concentration to a certain degree. The type of plant, output water, external influences, mode of operation and the materials must all be considered when choosing the treatment chemicals.

EnviroChemie systems guarantee efficient flushing

Engineering components must, moreover, be added to a systems if an operator wants to reduce the blowdown in an effort to save water. These add-on parts might be filters, physical components or special water recycling plants. They ensure that compliance with the previously defined maximum concentrations of substances is restored in the water in circulation.

When operating steam boilers, fresh water is, moreover, topped up to replenish the water lost through evaporation.  Here again, the salt content is regularly reduced by flushing through valves, and the concentration is restored.

Risk-free blowdown reduction – feel free to ask us for advice!

EnviroChemie offers a broad range of particularly high performing treatment chemicals and water recycling plants to minimize blowdown volumes in evaporation coolers or steam boilers. This is particularly interesting when using drinking water and draining the blowdown into the municipal sewage plant. Feel free to ask our application engineers for advice on flushing; they can help to identify the best possible solution for your needs.