BOILER OPERATION METHOD AND BOILER
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United States of America Patent
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Dec 31, 2015
app pub date -
Jan 20, 2014
filing date -
Feb 20, 2013
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Abstract
A boiler according to the present invention is equipped with: a water supply system (11) in which boiler water flows; ammonia addition equipment (12) that adds an ammonia solution to the boiler water; a pH measurement device (14) that measures the pH of the boiler water; and a control device (15). When the boiler water is heated the control device (15) controls the ammonia addition equipment (12) such that the pH of the boiler water is within a preservation pH range, and controls the ammonia addition equipment (12) such that the pH of the boiler water is within the preservation pH range before the flow of the boiler water in the water supply system (11) is stopped. At this time, a given pH within the preservation pH range is greater than a given pH within the operating pH range. With such a boiler, corrosion of the water supply system (11) can more easily be prevented than when the water supply system (11) is charged with preservation boiler water containing hydrazine.
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