US2009263313A1PendingUtilityA1

Chlorine dioxide generation systems

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Individually held — no corporate assignee on recordPriority: Jun 11, 2002Filed: Feb 23, 2009Published: Oct 22, 2009
Est. expiryJun 11, 2022(expired)· nominal 20-yr term from priority
Inventors:Edward M. MartensEarl B. SmithGregory J. Beckstrom
Y10T436/19C01B 11/024G05D 11/131
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PatentIndex Score
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Claims

Abstract

A chloride dioxide generation system made efficient by the use of a minimum number of seals and the use of a sophisticated computerized control system with the chlorine dioxide generation system comprising a) multiple PID loop control, b) a touch screen interface (HMI), c) automatic flow control of chemical precursors, d) a process controller, e) a minimum number of seals, f) a seal-less vacuum eductor, g) a unit design of the ejector; seal-less tubing connector and seal-less manual flowmeters, h) a vacuum eductor to be used with gas supply and other chemical feeds, i) a mass dispersion chlorine flowmeter to accurately supply amount of chlorine gas, j) an optical chlorine dioxide analyzer looped to the process controller and k) an automatic efficiency control screen.

Claims

exact text as granted — not AI-modified
1 - 22 . (canceled) 
     
     
         23 . A method of generating chlorine dioxide, comprising:
 measuring an amount of at least one reactant supplied to a reaction column;   measuring a generated chlorine dioxide yield;   determining a process efficiency by comparing a theoretical chlorine dioxide yield available based on the amount of at least one reactant measured to the generated chlorine dioxide yield measured; and   adjusting a flow rate of at least one reactant to the reaction column based on the process efficiency.   
     
     
         24 . The method of  claim 23 , wherein measuring an amount of at least one reactant supplied to the reaction column comprises measuring an amount of at least one of sodium chlorite, chlorine, sodium hypochlorite and hydrochloric acid. 
     
     
         25 . The method of  claim 23 , wherein adjusting a flow rate of at least one reactant is not dependent on linearity of the reactant flow rate with respect to a valve positioning. 
     
     
         26 . The method of  claim 23 , further comprising comparing the process efficiency to a predetermined limit. 
     
     
         27 . The method of  claim 26 , wherein the flow rate of at least one reactant is adjusted in response to the system efficiency being deficient with respect to the predetermined limit. 
     
     
         28 . The method of  claim 27 , wherein a flow rate of at least one of sodium chlorite, sodium hypochlorite and hydrochloric acid is adjusted in response to the system efficiency being deficient with respect to the predetermined limit. 
     
     
         29 . The method of  claim 27 , wherein a flow rate of at least one of sodium chlorite and chlorine is adjusted in response to the system efficiency being deficient with respect to the predetermined limit. 
     
     
         30 . The method of  claim 23 , wherein the flow rate of at least one reactant to the reaction column is continuously adjusted. 
     
     
         31 . The method of  claim 23 , further comprising monitoring a system condition. 
     
     
         32 . The method of  claim 31 , further comprising providing an alarm if the system condition deviates from an acceptable system condition.

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