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In cyclones (dust collectors) particles shall be separated from an air flow. These particles may be constituted of dust, fibres, powder, granules, etc. It is very common that these particles get electrostatically charged during transport through pipes and hoses. When particles reach the cyclone the air speed decreases and if the particles are electrostatically charged they are prone to stick to the walls of the cyclone. This results in lower degree of separation since the dimension of the cyclone decreases due to the buildup of materia on its interior. In cases when the cyclone terminates a pneumatic transport of e.g. granules the result may be an uneven supply or discolourations when changing pigments.
With adequately installed antistatic equipment one can achieve both the discharging of the cyclone surfaces, particles, as well as loosen the particles. By use of ionization equipment one can easily discharge the surfaces in doing which the electrostatic attractive forces acting between cyclone surface and particle eliminated. Thereafter it becomes very easy to remove dust and particles. Depending on the size and function of the cyclone and the particle build up air ionizing nozzles are placed as to blow ionized air into the flow of materia and thereby discharging the particles.
By installations one often uses one or more air blow nozzles BHAC11 which are connected to the power unit PUAC114.
The air blow nozzles must be supplied with dry and clean air of about 0.5-1.5 bar pressure.
Mounting is commonly made from the outside of the cyclone. It is important to consider the size of the cyclone and how and where the particles are attracted. In small cyclones it may well be enough to use on air blow nozzle while larger cyclones may call for installations both at the inlet and on or more places along the surface of the cyclone. The equipment may in some cases be installed on the interior of the cyclone, but it is then absolutely vital to avoid disturbing the air flow pattern of the cyclone too much.