Furnace Performance Depends on Dewpoint Measurement
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Jan 01, 2014 · Low-temperature corrosion seen in recovery boilers is often assumed to be caused by sulphuric acid condensation, and therefore the flue gas temperature is kept safely above any acid dew point.
LATEST ADVANCES IN THE UNDERSTANDING OF ACID DEWPOINT CO…
Different Types of Corrosion: Dew Point Corrosion -Causes and
Oct 01, 2013 · This paper presents the sulfuric acid dew point corrosion found on waste heat boiler tube for a copper smelting furnace. Macroscopic and microscopic observation results for the failed boiler tubes are shown. Then the analyzed results by X-ray fluorescence, X-ray diffraction and EPMA on failed boiler tubes are demonstrated.
It is typically about 130°F (54°C). Software tools such as DewPoint-Compass can be used to predict the risk of dew point corrosion under the prevailing operating conditions or to aid materials selection. Prevention and Prediction of Dew Point Corrosion
Aug 21, 2009 · In order to avoid or reduce the cold end corrosion the gas temperature leaving the heat transfer surface in boiler is kept around 150 degrees centigrade, ranging from 120 to 155. It is very important that the metal temperature of the tubes is always kept above the condensation temperature.
The byproducts created when burning natural gas to fire your boiler have a dew point of around 130ºF. This means that in order to get that condensation to appear on the heat exchanger, the water cycling through your radiators must be 130ºF or lower.
Nov 10, 2020 · Of all the equipment in a heater, the ones most susceptible to acid dew point corrosion are air preheaters (APHs). These heat exchangers transfer the heat from flue gases to the combustion air before it enters the burner. To do this, most recuperative APHs are arranged in a top-down and side-to-side flow configuration (Figure 1).