Diluting system and method
First Claim
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1. A dilution system for a chemical comprising:
- a dilution tank of known capacity for preparing the chemical in a desired diluted concentration, the tank mounted upon an electronic scale, the scale being capable of generating a series of weight signals related to the weight of the tank when empty and at various levels of filling;
a source of liquid concentrated chemical feed having a first, but variable, concentrated chemical concentration;
a chemical feed flow controller for controlling the flow of concentrated chemical feed to the dilution tank;
a source of liquid diluent;
a diluent flow controller for controlling the flow of diluent to the dilution tank; and
a system controller;
for receiving;
(a) a value related to the dilution tank capacity;
(b) a value related to the variable, concentrated chemical concentration;
(c) a value related to the desired diluted concentration; and
(d) a series of weight signals from the scale;
for calculating the amounts of concentrated chemical and diluent required to provide a target amount of diluted chemical of desired diluted concentration which does not exceed the known capacity of the dilution tank; and
for controlling the chemical feed flow controller and the diluent flow controller based upon the series of weight signals to produce a produced quantity of diluted chemical, the produced quantity related to the target amount of diluted chemical and not exceeding the capacity of the dilution tank.
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Abstract
A system and a method for automatically, accurately diluting chemical solutions on an industrial scale based upon real time weight measurements of chemical and diluent weight is disclosed.
26 Citations
37 Claims
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1. A dilution system for a chemical comprising:
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a dilution tank of known capacity for preparing the chemical in a desired diluted concentration, the tank mounted upon an electronic scale, the scale being capable of generating a series of weight signals related to the weight of the tank when empty and at various levels of filling;
a source of liquid concentrated chemical feed having a first, but variable, concentrated chemical concentration;
a chemical feed flow controller for controlling the flow of concentrated chemical feed to the dilution tank;
a source of liquid diluent;
a diluent flow controller for controlling the flow of diluent to the dilution tank; and
a system controller;
for receiving;
(a) a value related to the dilution tank capacity;
(b) a value related to the variable, concentrated chemical concentration;
(c) a value related to the desired diluted concentration; and
(d) a series of weight signals from the scale;
for calculating the amounts of concentrated chemical and diluent required to provide a target amount of diluted chemical of desired diluted concentration which does not exceed the known capacity of the dilution tank; and
for controlling the chemical feed flow controller and the diluent flow controller based upon the series of weight signals to produce a produced quantity of diluted chemical, the produced quantity related to the target amount of diluted chemical and not exceeding the capacity of the dilution tank. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification