Blending control system

Claim 1

An apparatus for controlling the blending of a rich stream having a primary and a secondary component and a diluting stream to form a blended stream comprising: (a) means connected to the rich stream for obtaining the values V 1 , the volumetric flow rate of the rich stream; σ 1 1 , the specific gravity of the rich stream; y 1 , the concentration of primary component in the rich stream; P 1 1 a, the density of primary components in the rich stream; P b 1 , the density of secondary component in the rich stream; and P 1 H .sbsb.2 O , the density of water in the rich stream; (b) means connected to the diluting stream for regulating the volumetric flow rate V 2 of the diluting stream; (c) means connected to the blended stream for obtaining the values of σ 1 3 , the specific gravity of the blended stream; y 3 , the concentration of primary component in the blended stream; P 3 a , the density of primary component in the blended stream; and P 3 H .sbsb.2 O , the density of water in the blended stream; (d) logic means connected to the means connected to the rich, diluting and blended stream for obtaining a value V 2 corresponding to a desired volumetric flow rate of the diluting stream and for applying that value to the means for regulating the volumetric flow rate of the diluting stream; and (e) wherein said logic means is operable according to the following: ##EQU9## wherein P b 2 is the density of secondary component in the diluting stream, the apparatus including means connected to the diluting stream for generating P b 2 .

Claim 2

An apparatus for controlling the blending of a rich stream having a primary and a secondary component and a diluting stream to form a blended stream comprising: (a) means connected to the rich stream for obtaining the values V 1 , the volumetric flow rate of the rich stream; σ 1 1 , the specific gravity of the rich stream; y 1 , the concentration of primary component in the rich stream; P 1 1 a, the density of primary components in the rich stream; P b 1 , the density of secondary component in the rich stream; and P 1 H .sbsb.2 O , the density of water in the rich stream; (b) means connected to the diluting stream for regulating the volumetric flow rate V 2 of the diluting stream; (c) means connected to the blended stream for obtaining the values of σ 1 3 , the specific gravity of the blended stream; y 3 , the concentration of primary component in the blended stream; P 3 a , the density of primary component in the blended stream; and P 3 H .sbsb.2 O , the density of water in the blended stream; (d) logic means connected to the means connected to the rich, diluting and blended stream for obtaining a value V 2 corresponding to a desired volumetric flow rate of the diluting stream and for applying that value to the means for regulating the volumetric flow rate of the diluting stream; and (e) wherein said logic means is operable according to the following: ##EQU9## wherein P b 2 is the density of secondary component in the diluting stream, the apparatus including means connected to the diluting stream for generating P b 2 .

Claim 4

An apparatus for controlling the blending of a rich stream having a primary component and a diluting stream of water to form a blended stream comprising: (a) means connected to the rich stream for obtaining a value V 1 corresponding to the volumetric flow rate of the rich stream; a value σ 1 1 corresponding to the specific gravity of the rich stream; y 1 corresponding to the concentration of primary component in the rich stream; and P a 1 corresponding to the density of primary component in the rich stream; (b) means for regulating the volumetric flow rate V 2 in the diluting stream; (c) means connected to the blending stream for obtaining a value σ 3 3 corresponding to the specific gravity of the diluted stream; Y 3 corresponding to the concentration of primary component in the blending stream; and P a 3 corresponding to the density of primary component in the blending stream; and logic means connected to said rich stream and said diluting stream of water for regulating the volumetric flow rate V 2 according to the formula: ##EQU10##

Claim 5

An apparatus for controlling the blending of a rich stream having a primary component and a diluting stream of water to form a blended stream comprising: (a) means connected to the rich stream for obtaining a value V 1 corresponding to the volumetric flow rate of the rich stream; a value σ 1 1 corresponding to the specific gravity of the rich stream; y 1 corresponding to the concentration of primary component in the rich stream; and P a 1 corresponding to the density of primary component in the rich stream; (b) means for regulating the volumetric flow rate V 2 in the diluting stream; (c) means connected to the blending stream for obtaining a value σ 3 3 corresponding to the specific gravity of the diluted stream; Y 3 corresponding to the concentration of primary component in the blending stream; and P a 3 corresponding to the density of primary component in the blending stream; and logic means connected to said rich stream and said diluting stream of water for regulating the volumetric flow rate V 2 according to the formula: ##EQU10##