CHEMetrics, Inc. is the only manufacturer of a portable test kit for detecting trace levels of dissolved oxygen in boiler applications. CHEMetrics® Test Kits feature the convenience of snap and read self-filling ampoules, offering plant operators a rapid, reliable, maintenance-free means of determining ppb levels of DO within one minute.
Determination of Dissolved oxygen content in water
Various kinds of dissolved oxygen monitoring equipment are commercially available. Probes and analyzers with galvanic, polarographic, and optical sensors are often mounted permanently inline. Portable colorimetric test kits that are sensitive enough to measure low levels of dissolved oxygen are also routinely used in boiler applications. Plant
3.2.2 Dissolved oxygen can be eliminated in a boiler system by utilizing a deaerator feed tank, heated feedwater, or treating the feedwater in the condensate tank. Introducing an oxygen scavenger into the feedwater system will also help eliminate any dissolved oxygen in the feedwater.
Effects of Presence of Dissolved Gases in Feed Water - Forbes Marshall
Looking at the first item, dissolved oxygen control,. target values specified by most manufacturers and utilities have called for oxygen concentrations in boiler feedwater or closed heating/cooling systems to be kept below 5-10 µg/L (5-10 ppb). Achieving this low level of
DETERMINATION OF DISSOLVED OXYGEN BY WINKLER TITRATION
The dissolved oxygen content of water at 20 °C is 9ppm, at 60 °C is 5 ppm and at 90 °C is just under 2 ppm. At 100 °C the oxygen content is theoretically 0 ppm. The removal of oxygen by heating (e.g direct steam injection) reduces the requirement of expensive oxygen scavenging chemicals (most often sodium sulphite), the addition of which actually leads up to increased feed water TDS and longer blowdowns.