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US 2001/0017264 A1Published application
Method for separating the constituents of a dispersion
AssigneeABB Research Ltd.
InventorsNorbert Klippel, Ole-Morten Midtgard
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AssigneeABB Research Ltd.
InventorsNorbert Klippel, Ole-Morten Midtgard
Estimating the term…
Method for separating the constituents of a dispersion In order to improve the efficiency of the separation of an insulating liquid (3) from a dispersum (4), in particular of water dispersed in oil, the electric conductivity (σs) of a dispersion (S) having the dispersion constituents (3, 4) is measured continuously or discontinuously. An optimum frequency (f) is calculated as a function of this conductivity. Pulsations of at least one pulsating electric field are thereby prescribed, this dispersion (S) being led through said field. This frequency (f) is preferably in the frequency range of >60 Hz-1 kHz. An electric field with a separating AC voltage (U3) can be arranged downstream of an electric field of a pulsating separating voltage (U2) of adjustable frequency (f) in the flow direction of the dispersion (S), and an electric field of a pulsating charging DC voltage (U1) can be arranged upstream.
A method for separating the constituents (3, 4) of a dispersion (S) having an electrically conducting dispersum (4) which is dispersed in an insulating liquid (3),
The method as claimed in one of the preceding claims, characterized in that electrically conducting droplets (4) in the insulating liquid (3) are electrically charged in an electric field of a charging voltage (U1, U1=, U1) of up to 5 kV before they are exposed to the at least one pulsating electric field of a pulsating separating voltage (U2, U3) for the purpose of separating the constituents (3, 4) of the dispersion (S).
The method as claimed in one of the preceding claims, characterized in that the proportion of the dispersum (4) in the dispersion (S) is ≦40%.
The method as claimed in one of the preceding claims, characterized
The method as claimed in one of the preceding claims, characterized in that the frequency (f) of the pulsations of the at least one pulsating electric field is in the frequency range of >60 Hz-1 kHz.
Dependencies are inferred from the claim text.