Metering system
First Claim
1. An automatic metering system for producing a liquid at least one component of which is present at a predetermined concentration which comprises a mixing tank in which the liquor components are mixed, a metering device adapted to meter out varying amounts of at least one of the components into the mixing tank, an analyser adapted to measure the concentration in the mixed liquor components of a component which is to be ultimately present at a predetermined concentration and a data processing unit with an imput from the analyser and an output to the metering device, being programmed to effect an operational cycle which comprises computing the deviation of the measured concentration from the predetermined concentration, correlating the deviation with the amount of at least one of the components necessary to be metered out substantially to reduce said deviation by a reduction factor of less than 100 percent and automatically operating the metering device to meter out the correlated amount, and to repeat said operational cycle until the predetermined concentration has been substantially reached.
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Accused Products
Abstract
The invention concerns a novel automatic metering system for producing a liquor containing a predetermined concentration of at least one component thereof, which comprises a mixing tank in which the liquor components are mixed, a metering device adapted to meter out at least one of the components into the mixing tank, an analyzer adapted to measure the concentration of the component(s) required at a predetermined concentration and a data processing unit, with an input from the analyzer and an output to the metering device, being programmed to effect an operational cycle which comprises computing the deviation of the measured concentration from the predetermined concentration of the component(s), correlating the deviation with the amount of at least one of the components necessary to be metered out, substantially to reduce said deviation by a reduction factor of less than 100 percent, and automatically operating the metering device to meter out the correlated amount, and to repeat said operational cycle until the predetermined concentration has been substantially reached, and a method of operating the system.
64 Citations
25 Claims
- 1. An automatic metering system for producing a liquid at least one component of which is present at a predetermined concentration which comprises a mixing tank in which the liquor components are mixed, a metering device adapted to meter out varying amounts of at least one of the components into the mixing tank, an analyser adapted to measure the concentration in the mixed liquor components of a component which is to be ultimately present at a predetermined concentration and a data processing unit with an imput from the analyser and an output to the metering device, being programmed to effect an operational cycle which comprises computing the deviation of the measured concentration from the predetermined concentration, correlating the deviation with the amount of at least one of the components necessary to be metered out substantially to reduce said deviation by a reduction factor of less than 100 percent and automatically operating the metering device to meter out the correlated amount, and to repeat said operational cycle until the predetermined concentration has been substantially reached.
- 15. A method of automatically producing a liquor containing a predetermined concentration of at least one component thereof which comprises effecting the operational cycle of measuring the concentration in a premixed liquor of a component which is to be ultimately present at a predetermined concentration, automatically determining the deviation of the measured concentration from the predetermined concentration, correlating the deviation with the amount of at least one of the components to be added to the liquor substantially to reduce said deviation by a reduction factor of less than 100 percent and automatically metering out the correlated amount into the premixed liquor, and repeating said operational cycle until the predetermined concentration has been substantially reached.
Specification