Patent DE-102006019647-A1 (DE)
Title: Procedure for dimensioning a rotating device for the fusion and/or refinement of glass, comprises determining a correlation between the quality of the glass and the residence time at a given temperature by determining a reaction rate
Inventor: SCHMITT STEFAN
IPC: C03B5/43
Filed: 2006-04-25
Abstract: The procedure for dimensioning a rotating device (2) for the fusion and/or refinement of glass, comprises determining a correlation between the quality Q of the glass and the residence time t at a given temperature T by determining a reaction rate k(T), specifying a target quality Q m i n (A m i n ; c g a s ) of the glass after the traversing of the glass from an inlet (20) to an outlet (29) of the rotating device, determining a residence time t m i n of the glass, specifying a target rotation frequency f* of the rotating device, and determining a dimension of the inner wall surface. The procedure for dimensioning a rotating device (2) for the fusion and/or refinement of glass, comprises determining a correlation between the quality Q of the glass and the residence time t at a given temperature T by determining a reaction rate k(T), specifying a target quality Q m i n (A m i n ; c g a s ) of the glass after the traversing of the glass from an inlet (20) to an outlet (29) of the rotating device, specifying a treatment temperature T m, determining a residence time t m i n of the glass in the rotating device, specifying a mass flow M of the glass and/or a quantity of a heterogeneous mixture passing through the rotating device, specifying a target rotation frequency f* of the rotating device, and determining a dimension of the inner wall surface with respect to the residence time, the mass flow and the target rotation frequency. The inner wall exhibits a contour (r, r) with the inner wall surface that is shaped in such a manner that a layer of glass forms itself on the inside wall during the rotation of the rotating device with the target rotation frequency. The layer of glass exhibits an essentially constant thickness d* at each vertical position z. The residence time is required for the target quality determined at the treatment temperature and is determined from the reaction rate. The rotating device is dimensioned rotation-symmetrically with respect to its longitudinal axis, with a total height H, a diameter at the inlet, a diameter at the outlet and with an inner wall surface F in such a manner that the contour of the inner wall surface between the inlet and outlet is determined with respect to its target quality of the glass at the outlet. The correlation is determined between the quality of the glass and the residence time at a given temperature. The minimum residence time is determined by the equation as given in the specification. The dimension F of the inner wall with the contour is determined by the function (F) as given in the specification. The correlations are maintained between the minimum residence, contour of the inner wall that has a slope angle alpha (r), the dimension of the interior wall surface, the mass flow and the glass speed u(z, r) with a density sigma and a viscosity eta on the inside wall, on which the glass forms a layer with the thickness d(r). The minimum residence time is determined by the integral of u(z, r) along the contour of the inner wall. The minimum melting degree A m i n is >=98%. The gas content is =5 vol.%. Independent claims are included for: (1) a rotating device for the production of glass; (2) element for a rotating device for the production of glass; (3) plant for the production of glass; and (4) procedure for the production of glass.