High-efficiency evaporation system for mine wastewater

November 2016 Analytical Instrumentation & Environmental Monitoring

After identifying the need for an environmentally safe evaporation system to reduce excess wastewater at mines, I-CAT Water Solutions developed the I-VAP 500 Evaporation Cannon, which is capable of handling 500 cubic metres per 12-hour day. “The evaporation rate is 60-65%, depending on ambient weather conditions,” explains I-CAT technical manager Morne Van Wyk.

This latest wastewater treatment and management system from I-CAT ensures that wastewater from mine sites does not enter the general environment and thereby contaminate water further downstream. A particular benefit of the I-VAP 500 is its low energy-use to evaporation ratio.

Principle of operation

The I-VAP 500 can cover 32 000 square metres, with an automatic oscillation option of up to 359°. In addition, an integrated turntable bearing allows the operator to override the oscillator manually in order to reposition the fan barrel quickly. What’s more, the cannon has an adjustable angle of throw, with a height adjustment of 7-45°.

It produces a large spray pattern that allows for a longer float time, thereby increasing the evaporation rate. The cannon atomises the water through its 38 nozzles: available in PVC, stainless steel, brass or nylon to suit any application. It discharges 21 litres a minute through each nozzle, with the 55 kW pump delivering a maximum pressure of 10 bar. The droplet size is 150-180 μ, with a throw distance of 80-110 m.

The I-VAP 500 features an integrated fan and nozzle ring design, together with a high-pressure hose and a 40 mm cam-and-groove quick disconnect female coupling. It boasts a premium efficiency 0,10 kW oscillator motor, and is supplied with a 50 mm electrical cord of up to 30 m, with other options available.

The control panel is secured in a stainless steel cabinet, with the cannon itself constructed from composite materials in order to prevent rust, as well as making it lightweight, durable and mobile.

Regular maintenance is essential, with I-CAT Water Solutions recommending that the nozzles be inspected quarterly if potable water is used. A strainer should also be used at all times. The fan motor, high-pressure pump and oscillator bearing should be greased in accordance with a regular maintenance schedule.

Dimensions of the I-VAP 500 Evaporation Cannon (standard skid mount):

• 2105 mm wide.

• 2600 mm long.

• 2510 mm high.

• Weight: 1480 kg.

For more information contact Morne van Wyk, I-CAT Water Solutions, 086 112 4228, [email protected], www.i-cat.co.za

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