Computerized system for feeding chemicals into water treatment system
First Claim
1. In a system having a main line carrying a first fluid therethrough, control means, and means for selectively introducing a second fluid into said main line comprising a second line of a lower flow rate than said main line and arranged to receive a reference fluid therethrough, said second line being connected in shunt with said main line and arranged to selectively receive a portion of said first fluid therethrough, said reference fluid having known parameters, one of which being the flow rate through said second line, said second line including injecting means for introducing said second fluid therein and for uniformly mixing said second fluid with any fluid flowing therethrough, said second line including first sensing means located upstream of said injecting means for measuring a first predetermined parameter of any fluid flowing thereby, said first parameter not being the flow rate through said second line, and second sensing means located downstream of said injecting means for measuring said first parameter of any fluid flowing thereby, said control means being coupled to said injecting means and said first and second sensing means for determining the concentration of said second fluid flowing through said second line for introduction into said main line based on the difference between said first parameter as measured by said first and second sensing means, and for controlling the introduction of said second fluid into said second line as a function of said flow rate through said second line and the determined concentration of said second fluid.
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Accused Products
Abstract
A computerized chemical application system for a water treatment system. The water treatment system includes a main header conduit through which water flows. Connected in shunt with the main header is a chemical introduction header of smaller diameter and a lower flow rate than the main header. A computer control is provided to sense the conductivity of a reference water flowing through the chemical introduction header. Injection means are provided to introduce a water treatment liquid into the chemical introduction header and to mix it thoroughly with the water flowing therein. The conductivity of the mixture is sensed, and based upon the differential conductivity and values relating conductivity to concentration for the water treatment liquid (which values are stored within the computer control) the amount of the water treatment liquid introduced is precisely controlled.
161 Citations
29 Claims
- 1. In a system having a main line carrying a first fluid therethrough, control means, and means for selectively introducing a second fluid into said main line comprising a second line of a lower flow rate than said main line and arranged to receive a reference fluid therethrough, said second line being connected in shunt with said main line and arranged to selectively receive a portion of said first fluid therethrough, said reference fluid having known parameters, one of which being the flow rate through said second line, said second line including injecting means for introducing said second fluid therein and for uniformly mixing said second fluid with any fluid flowing therethrough, said second line including first sensing means located upstream of said injecting means for measuring a first predetermined parameter of any fluid flowing thereby, said first parameter not being the flow rate through said second line, and second sensing means located downstream of said injecting means for measuring said first parameter of any fluid flowing thereby, said control means being coupled to said injecting means and said first and second sensing means for determining the concentration of said second fluid flowing through said second line for introduction into said main line based on the difference between said first parameter as measured by said first and second sensing means, and for controlling the introduction of said second fluid into said second line as a function of said flow rate through said second line and the determined concentration of said second fluid.
- 25. The method of accurately mixing a predetermined amount of a second fluid with a first fluid, said first fluid flowing through a main line, comprising the steps of providing a second line in shunt with said main line, said second line being arranged to be selectively connected to said main line to allow fluid to flow therebetween, said second line having a lower flow rate than said main line, providing a reference fluid through said second line, said reference fluid having known parameters, one of which being the flow rate through said second line, measuring a first predetermined parameter of any fluid flowing through said second line at a first point, said first parameter not being the flow rate through said second line, injecting said second fluid into said second line downstream of said first point and homogeneously mixing said fluids, measuring said first predetermined parameter of said homogeneous mixture of fluids in said second line at a second point downstream of said first point and determining when said predetermined amount of said second fluid has been injected into said second line based on the difference between said measured first parameters and as a function of said flow rate through said second line, and stopping the injection of said second fluid into said second line at that time.
Specification