Powerful dry dispersion in the free aerosol jet for laser diffraction and dynamic image analysis
The dispersion effects in the RODOS injection disperser are caused by a special flow control in the long, straight dispersing line that ultimately enables a release of the isolated and highly accelerated particles in an aerosol jet. The product is fed in the axis of flow and initiates linear acceleration and mixing of particles with the compressed air or an inert gas. The dispersion energy is precisely adjusted to the product via the pre-pressure and an annular gap. The high air flow, the expansion and the ultimate jet formation provide a high exit speed of up to 100 m/s and an optimum optical dilution of the aerosol cloud for analysis. This way it is also possible to supply the sensor with difficult-to-disperse particles, such as residually moist, oily or magnetic powder, as perfectly dispersed individual particles without the risk of reagglomeration.
The basic dispersion effects are composed of speed gradients (turbulences) in the air flow as well as particle-particle and particle-wall impacts. The method we have developed for dry dispersion with compressed air has not only found its way into the applicable standards (cf. ISO 13320 – laser diffraction), it has also firmly established itself on the market and, with RODOS, sets the standard for all dry, fine and agglomerating products.
