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Electromagnets for high-flow water processing
Several constructions with permanent magnets are adequate for anti-scale magnetic treatment (AMT) with low water flow capacity, i. e. lower than 5 m3/h, in contrast, for higher flow load in industrial water processes, electromagnets give a better construction solution with acceptable dimensions. A cylindrical ferromagnetic kernel, inserted along the axes of the pipe, provides a magnetic field that is sufficiently strong and perpendicular to the water-flow direction at a relatively low hydrodynamic pressure drop. The annular cross-section with high radius enables high water flow capacity, while the low gap thickness strengthens the magnetic field in the water region. The configuration with solenoids inserted into the cylindrical kernel was analyzed at water velocity 1.5 m/s because at a high flow, the requirement for sufficient exposition time would prolong the device or expand the gap, which would demand higher investment costs and electricity consumption. The model supplied with DC seems to be advantageous since the investment and operational costs (at power consumption of a few tens of watts per m3/h) are more than ten times lower than the costs of scale-prevention ion exchanging (which are commonly around 0.1€ per m3 of treated water), while in cases without the treatment, the energy loss owing to fouling in heat exchangers can exceed 0.5€ per m3 of heated water.
Electromagnets for high-flow water processing
Several constructions with permanent magnets are adequate for anti-scale magnetic treatment (AMT) with low water flow capacity, i. e. lower than 5 m3/h, in contrast, for higher flow load in industrial water processes, electromagnets give a better construction solution with acceptable dimensions. A cylindrical ferromagnetic kernel, inserted along the axes of the pipe, provides a magnetic field that is sufficiently strong and perpendicular to the water-flow direction at a relatively low hydrodynamic pressure drop. The annular cross-section with high radius enables high water flow capacity, while the low gap thickness strengthens the magnetic field in the water region. The configuration with solenoids inserted into the cylindrical kernel was analyzed at water velocity 1.5 m/s because at a high flow, the requirement for sufficient exposition time would prolong the device or expand the gap, which would demand higher investment costs and electricity consumption. The model supplied with DC seems to be advantageous since the investment and operational costs (at power consumption of a few tens of watts per m3/h) are more than ten times lower than the costs of scale-prevention ion exchanging (which are commonly around 0.1€ per m3 of treated water), while in cases without the treatment, the energy loss owing to fouling in heat exchangers can exceed 0.5€ per m3 of heated water.
Electromagnets for high-flow water processing
Lipus, L.C. (author) / Acko, B. (author) / Hamler, A. (author)
Chemical Engineering and Processing ; 50 ; 952-958
2011
7 Seiten, 6 Bilder, 1 Tabelle, 30 Quellen
Article (Journal)
English
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