What is the lowest possible exhaust temperature for a heating furnace?
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As the title suggests, winter is approaching soon, and we would like to discuss the issue of the flue gas temperature in heating furnaces. Assuming that the total sulfur content in the fuel is 0, and assuming that the processes and equipment available can be used to reduce the flue gas temperature, is it possible to lower the flue gas temperature of heating furnaces even further, to around 50 degrees or lower?
The exhaust temperature of a heating furnace should generally not be lower than the dew point temperature, to prevent condensation water from causing corrosion to the equipment. The dew point temperature is usually above 130°C; therefore, even if the sulfur content is 0, it is not recommended that the flue gas temperature be below 130°C. If it drops to 50 degrees or lower, it may cause serious condensation and corrosion problems. .
Our company’s patented low-temperature air preheaters have achieved remarkable results in the petroleum refining industry, enabling the flue gas temperature of heating furnaces to be reduced to 80 degrees – a first in China
I agree with you; I remember that the minimum temperature cannot be lower than 110 degrees
I’ve learned something new – how is the exhaust temperature adjusted then?
The cross-bar of the air preheater can be used to adjust the flue gas temperature
Different companies may have different requirements; on the basis of compliance, overall efficiency is the criterion for making a choice. 1. The dew point temperature needs to be taken into account; since there is no sulfur present, the carbon dioxide content must also be considered, as well as the corrosion risks that arise after dew point formation. If no investments have been made in protective measures, the costs associated with equipment anti-corrosion measures and subsequent operation expenses need to be calculated in order to select an appropriate solution. 2. Assuming the temperature is kept below the dew point, it is necessary to consider the amount of water that will condense and whether this water can be utilized; otherwise, it will increase the costs associated with wastewater treatment