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Steam pressure and temperature has increased rapidly and we are now engaged in consideration of problems in the supercritical field. This progress in the generation of steam could not be possible if water treatment and deaerating techniques were not refined to reduce deposits and corrosion on the heat-affected surfaces. Oxygen is a principal factor in the study of corrosion of metals in contact with water and its quantity must be closely monitored. The purpose of this paper is to describe the operation of and experience with an instrument used to analyze and record the dissolved oxygen of condensate and boiler feed-water. This instrument, the Cambridge Oxygen Analyzer, has a proven record in the field and is one of the principal control devices used in a boiler plant operating at higher pressures. The rise in steam pressure and temperature has been accompanied by an increase in boiler steam capacity. Today, units generating 2,000,000 lb of steam an hour are being designed for various utility systems. This progress has been necessary to meet the ever demanding reach for higher efficiencies. Kilowatt ratings per station operating employee have risen rapidly. The personnel to operate this equipment has been reduced to a minimum and the chemical control staff, in most instances, has been decreased in this economy of man-power. This condition necessitates the utilization of reliable analysis and control equipment to permit the engineer and the plant chemist an opportunity to operate effectively. The equipment to be considered in this presentation has been utilized by members of the Research Department of Combustion Engineering, Inc., for the past fourteen years. The comments relative to this apparatus are based on the practice gained in the field under various operating conditions.
Grabowski, H. A.
Combustion Engineering, Inc., New York, N. Y.