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Instrumentation and Control Systems

  • Thomas F. O’Brien
  • Tilak V. Bommaraju
  • Fumio Hine

Abstract

Chapters 7 through 9 have already covered the processes involved in a chlor-alkali plant, along with some of the essentials of their control. This chapter goes into the details of control systems and hardware. The discussion, where differences exist, focuses primarily on the membrane-cell process. The chlorine and hydrogen processes are essentially the same regardless of the type of cell used. Control of absolute and differential pressures is especially important in the gas systems, and so the discussion is divided primarily according to operating pressure level. Membrane cells require extremely pure brine, and some of the operations used are not necessary with the other types of cell. Otherwise, mercury-cell brine systems are for the most part very similar to those in membranecell plants, but they require their own special features and precautions to prevent the escape of mercury into the environment. Diaphragm cells require approximately the same treatment of new brine, but, unlike the situation with the other cells, there is no direct recycle of the anolyte. Therefore, the discussion of brine systems follows the membranecell process, which is the most comprehensive of the three. The caustic systems for the three manufacturing processes are very different and are discussed separately.

Keywords

Control Valve Centrifugal Compressor Distribute Control System Butterfly Valve Discharge Header 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Instrumentation Symbols and Identification, American National Standard ANSI/ISA-S5.1-1984 Reaffirmed, ISA, Research Triangle Park, NC (1992).Google Scholar
  2. 2.
    Refrigerated Liquid Chlorine Storage, Pamphlet 78, Edition 3, The Chlorine Institute, Inc., Washington, DC (2000), pp. 10, 11.Google Scholar
  3. 3.
    Pressure Relief Device Standards-Part 3-Stationary Storage Containers for Compressed Gases, Pamphlet CGA S-1.3, Compressed Gas Association, Arlington, VA (1995).Google Scholar
  4. 4.
    Relief Valves for Use on Dry Gas or Liquid Chlorine, GEST 76/64, 4th ed., Euro Chlor, Brussels (1983), p. 2.Google Scholar
  5. 5.
    Low Pressure Storage of Liquid Chlorine, GEST 73.17, 5th ed., Euro Chlor, Brussels (1996), pp. 11, 12.Google Scholar
  6. 6.
    Refrigerated Liquid Chlorine Storage, Pamphlet 78, Edition 3, The Chlorine Institute, Inc., Washington, DC (2000), pp. 8–13.Google Scholar
  7. 7.
    R.E. Kucinski and H.M.B. Gerner, Ion Exchange Membrane Plant Safety; Anode Side Mixing of Chlorine and Hydrogen. In R.W. Curry (ed.), Modern Chlor-Alkali Technology, vol. 6, Royal Society of Chemistry, Cambridge (1995), p. 89.Google Scholar
  8. 8.
    Learning From Experience, Pamphlet 167, Edition 1, The Chlorine Institute, Inc., Washington, DC (2002), p. 4.Google Scholar

Copyright information

© Springer Science+Business Media, Inc 2005

Authors and Affiliations

  • Thomas F. O’Brien
    • 1
  • Tilak V. Bommaraju
    • 2
  • Fumio Hine
    • 3
  1. 1.Independent Consultant MediaUSA
  2. 2.Independent Consultant Grand IslandNew YorkUSA
  3. 3.Nagoya Institute of TechnologyNagoyaJapan

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