WATER TREATMENT FOR HIGH PRESSURE MARINE BOILERS

It is generally recognized that water make-up to marine boilers operating at pressures in the range 850 to 1200 psi should contain dissolved solids of less than 1-ppm combined with very low levels of dissolved oxygen, carbon dioxide, silica and heavy metals. This quality can be obtained from seawater on an economic basis only by using evaporation followed by mixed bed demineralization and efficient deoxygenation. The latter can be achieved using a combination of mechanical deaeration followed by chemical scavenging of any remaining traces. The preferred conditioning of water in the boiler drum circuit is by ordinated phosphate treatment to enable the desirable degree of alkalinity to be maintained without risk of caustic embrittlement. The recommended system gives the maximum protection against the occurrence of corrosion in the boiler, turbine and condensate systems and is inexpensive in both capital and running costs. In this paper a description of the ion exchange purification system to achieve the required water quality is given.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/6660842
• Corporate Authors:

  Benn Brothers Marine Publications Limited

  Lyon Tower, 125 High Street, Colliers Wood
  London SW19 2JN,   England 
• Authors:
  • Down, P E
• Publication Date: 1971-4

Media Info

• Features: References;
• Pagination: p. 431-434
• Serial:
  • Shipping World & Shipbuilder
  • Volume: 164
  • Issue Number: 3856
  • Publisher: Seven Kings Publications, Limited
  • ISSN: 0037-3931
  • Serial URL: http://www.shippingworld.org/

Subject/Index Terms

• TRT Terms: Boilers; Equipment maintenance; Monitoring; Water quality
• Old TRIS Terms: Boiler maintenance; Boiler water treatment
• Subject Areas: Maintenance and Preservation; Marine Transportation;

Filing Info

• Accession Number: 00034417
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Sep 27 1974 12:00AM