Water control system using oxidation reduction potential sensing
First Claim
1. An automatic control system adapted for controlling scale formation in a water circulating system comprising:
- first sensing means for measuring the oxygen reduction potential (ORP) of the circulating water containing a soap having a 1;
1 stoichiometric equivalent of an organic acid and ammonia in the water for controlling scale formation in said system andsupply means for automatically supplying said soap in response to a predetermined ORP measured by said first sensing means substantially corresponding to a pH higher or lower than a selected range for controlling said scale.
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Accused Products
Abstract
An automatic control system for maintaining the quality of water in a cooling tower utilizes a probe (38) which senses the oxygen reduction potential (ORP) of a soap having a 1:1 stoichiometric equivalent of an organic acid and ammonia in the water. The soap is pumped from a chemical supply means (20) containing the soap in response to the ORP of the soap in the water falling below a predetermined threshold. A second sensing probe measures the conductivity (in MHos) of the water as a factor of the total dissolved solids (TDS) to control the bleed-off or blow-down of the water. The chemicals, which are supplied for maintaining the ORP, permit significantly higher total dissolved solids in the water than with standard cooling tower systems, without the buildup of scale. As a consequence, water consumption is significantly reduced; and the system functions automatically, without requiring periodic visual inspection, water analysis or manual operation.
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Citations
11 Claims
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1. An automatic control system adapted for controlling scale formation in a water circulating system comprising:
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first sensing means for measuring the oxygen reduction potential (ORP) of the circulating water containing a soap having a 1;
1 stoichiometric equivalent of an organic acid and ammonia in the water for controlling scale formation in said system andsupply means for automatically supplying said soap in response to a predetermined ORP measured by said first sensing means substantially corresponding to a pH higher or lower than a selected range for controlling said scale. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification