Pressurized steam boilers and their control
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United States of America Patent
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-
Feb 18, 2003
Grant Date -
Oct 10, 2002
app pub date -
Apr 4, 2001
filing date -
Apr 4, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The flow rate of water into a pressurised steam boiler heated by a burner is controlled by monitoring the level of water in the boiler, monitoring the pressure of steam in the boiler and monitoring the firing rate of the boiler. The level of water in the boiler is measured by a pair of capacitance probes. By controlling the water flow with regard not only to variables relating to the boiler but also variables relating to the burner, it is possible to provide a better control of water flow. Also, by assessing variables relating both to the burner operation and the boiler operation, an assessment of the mass flow rate of steam from the boiler can be made without employing a steam flow meter.
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