U.S. patents available from 1976 to present.
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Use of control matrix for cooling water systems control

Patent 6315909 Issued on November 13, 2001. Estimated Expiration Date: Icon_subject May 1, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

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Inventors

Assignee

Application

No. 562397 filed on 05/01/2000

US Classes:

210/745, Turbidity or optically sensing210/696, Preventing, decreasing, or delaying precipitation, coagulation or flocculation210/739, Including controlling process in response to a sensed condition422/14, Essentially pure water environment436/164, OPTICAL RESULT436/172, With fluorescence or luminescence700/273Separation process

Examiners

Primary: Drodge, Joseph W.

Attorney, Agent or Firm

Foreign Patent References

  • 1141147 GB. 01/11/1969

International Class

B01D 017/12

Abstract

Described and claimed is a method of controlling a cooling water system in which control is based on information from a control Matrix applicable to the specific operating parameters of the cooling water system including:(i) providing a suitable fluorometer, sufficient analytical devices and a suitable controller;(ii) programming the suitable fluorometer and controller using planning information from a control Matrix for cooling water systems being treated with treatment programs selected from the group consisting of:(d) stabilized phosphate,(e) zinc, and(f) all organic;(iii) using the fluorometer and sufficient analytical devices to determine the status of system factors;(iv) determining the pattern of changes in the readings from step (iii) over time;(v) comparing the changes in readings in steps (iii) and (iv), with the information listed in the control Matrix to determine what corrective action(s) is recommended; and(vi) using the controller to automatically implement the corrective action(s).

Other References

  • "Water Treatment Dosage Control And Relationship To Performance", J. E. Hoots, Paper No. 260, Corrosion 95, NACE Int'l Annual Conference and Corrosion Show, pp. 260/1-260/11, undated
  • "High Cycle Cooling Tower Operation: Hurdles And Solutions", J.E. Hoots, et al., IWC-99-48, pp. 388-397, undated
  • "The Use of Coumarin Derivatives In The Preparation Of Fluorescence-Labeled Poly[N-2-(Hydroxypropyl)methacrylamide]", Jiri Krejcoves, et al., Collection Czechoslov. Chem. Commun. [vol. 45] [1980], pp. 727-731
  • "Expert System For Water Treatment", FYI, Chemical Engineering Progress, Undated
  • "Application Of Expert Systems For Cooling Water Monitoring", Paul A. Burda, et al, Corrosion 95, NACE Int'l Annual Conf. And Corrosion Show, Paper No. 255, pp. 255/1-255/20, Undated
  • "A New On-Line Monitoring And Control Capability For Cooling Water Programs", J. Richardson, et al., Cooling Tower Institute 1993 Annual Meeting, Technical Paper Number TP93-10, pp. 1-18
  • "Approaches For Reducing Phosphorous In Cooling Water Programs", D. Hartwick, et al., Corrosion 96, Paper No. 605, pp. 605/1-605/21, Undated
  • "Monitoring Polymeric Treatment Programs In Alkaline Cooling Water", Barbara E. Moriarty, et al., Presented At Corrosion '89 Meeting, Apr., 1989, pp. 1-14
  • "A New Method To Control Cooling Water Chemistry", James R. Macdonald, et al., Presented At AICHE Conference, Apr., 1989
  • "TRASAR™ Technology Shows Dramatic Improvement In Program Control At A Mid-South Chemical Plant", Nalco Chemical Co. Case Study, CH-209, 1988
  • Nalco TRASAR™ Technology For Cooling Water Treatment, Nalco Chemical Co., Bulletin 154, 9/88
  • "Systems Technology For Automated Cooling Water Control", Nalco Chemical Co., Bulletin 156, 10/88
  • "Automated Monitoring and Control Feed Systems Designed To Help You Optimize Your Total Wet End Program", Nalco Chemical Co., Chem Mate™, Bulletin 230, 4/9
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