The sulfur content in the flue gas of the organic heat carrier furnace is above the specified limit
Thread Content
The sulfur content in the flue gas of the organic heat carrier furnace is above the specified limit (70 ppm); the sulfur content in the fuel gas analyzed is very low. The tube bundles of the air preheater (used for recovering waste heat from the flue gas) are severely corroded. Could the high sulfur content in the flue gas be related to this?
The corrosion of air preheaters is related to the sulfur content in the flue gas and the humidity of the flue gas.
There are 3 heat transfer oil furnaces in total; the sulfur content in the flue gas from the other two is below 50 ppm, while only this one exceeds the limit! The sulfur content in gas is very low!
This post was last edited by Wang Genrong on 2021-6-21 at 17:02. Is it online testing? Could it be that errors in the test results are caused by a \"drift\" in the data from the testing instruments?
Let’s take another look at what the humidity and temperature of the flue gas are
It’s impossible to measure humidity! Temperature 120°C!
3 identical furnaces, using the same fuel gas and following the same combustion process – why is the sulfur dioxide content in the exhaust gases different? No way. Could it be that one of the furnaces has insufficient combustion air, resulting in sulfur dioxide gas not being adequately diluted? The other 2 furnaces have a higher amount of air for combustion, so the sulfur dioxide gas is diluted?
Every time the sulfur content in this furnace exceeds the limit, it is necessary to increase the oxygen level in order to reduce the sulfur content! The sulfur content of the other several furnaces remained normal without any adjustments. So it’s strange why this situation occurs
There could be one of three reasons: 1. The system resistance of this furnace is higher than that of the other two furnaces, resulting in less combustion air being supplied to it compared to the other two furnaces； 2. The fuel gas supply to this furnace is higher than that of the other two furnaces, while the supply of combustion air is similar to that of the other furnaces ； 3. The system operates under negative pressure; the system of this furnace has good sealing properties, while the systems of the other two furnaces have slightly poorer sealing, allowing air to enter the system.
A sulfur content of 50 ppm is already quite high, indicating that the fuel gas contains sulfur