High Purity Condensate Monitoring

Source: Emerson
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BACKGROUND
In high pressure boilers, it is necessary to monitor the return condensate before it goes back to the boiler to ensure that it is not contaminated beyond acceptable limits. In smaller boilers, the return condensate can be a fairly high level of dissolved solids concentrations, which can be measured with the use of a standard conductivity meter. In the case of large boilers, such as those used to generate electricity, the allowable level of solids is in the low parts-per-million range. These low values of conductivity are often masked by the larger conductivities of water treatment chemicals that have been added to protect the boiler. In a case like this, the Larson Lane Condensate Monitor Model CH16D is used to separate the conductivity caused by the dissolved solids from the conductivity caused by the water treatment chemicals.

In the very best boilers, the allowable limits of contamination could be in the very low parts-per-billion range. In this case it would be necessary to reboil the water after it passes through the Model CH16D to remove gasses that can also mask the conductivities caused by the dissolved solids.

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Full Article: High Purity Condensate Monitoring