How is dust consolidated?

Dust is the fine dispersal of airborne particles of matter caused by mechanical processes or air turbulence.

The atomized mist generated by dust-laying sprayers wets and adds weight to the particulate matter. The weight gain forces the dust particles to settle quickly.

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Does the dust-reducing effect depend on the size of the drops of water?

Yes. Drops of water which are too big, such as those produced with a hose, are less efficient at suppressing the dust. The available surface is smaller and the drops are heavier. Therefore they only remain in the air for a short time and this significantly reduces their dust-bonding potential.

By contrast, very small drops of water (e.g. steam) have a higher degree of efficiency but are heavily dependent on the wind and cannot easily be moved by the turbine. The ideal droplet size depends on the application.

It is therefore essential for optimum dust management to be able to select the droplet size.

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How much water does a dust-laying sprayer use?

The water consumption of a dust-laying sprayer can be adjusted according to requirements.

The standard consumption in routine cases of demolition is 40 to 70 l/min. This corresponds to roughly one tenth of the water used for demolition work by a conventional hose.

The ideal rate of consumption for recycling applications is 15 to 30 l/min. The amount of water deposited in this way is less than 1mm per hour - insufficient for puddles to form on the ground, for the material to get wet and for its weight to change.

In less frequent cases (e.g. leaching and scrubbing processes), greater water throughput rates are required and these can also be guaranteed by the TechnoAlpin dust-laying sprayers.

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Do dust-laying sprayers generate snow at sub-zero temperatures?

The TechnoAlpin dust-laying sprayers do not generate ice droplets or snow at air temperatures as low as -10 °C (they would also need an air compressor and nucleation nozzles to be able to do this). Therefore dust-laying sprayers can also be used at sub-zero temperatures to control dust emissions.

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What is the difference between dust-laying sprayers and snow generators?

Dust-laying sprayers have axial-flow nozzles integrated in the turbine. This brings about a linear spray action, thus allowing greater projection distances with compact turbines and reduced power consumption.

The dust-laying sprayers also work with booster pumps. Hence the water is sprayed out of the ceramic nozzles in the form of a fine mist, thereby optimizing the dust-bonding effect.