How is the heat required to raise the flue gas temperature from 55 degrees to 90 degrees after the desulfurization tower calculated?
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How is the heat required to raise the flue gas temperature from 55 degrees to 90 degrees after the desulfurization tower calculated? 1. The flue gas after wet desulfurization should be at least saturated flue gas. For the water contained in saturated flue gas, should its heat capacity be calculated based on liquid properties or gas properties? 2. How much heat is required to raise saturated flue gas at 55 degrees to 90 degrees? 3. The flue gas discharged from the wet desulfurization tower is not only saturated flue gas; it should be supersaturated flue gas, containing a certain amount of water droplets (in liquid form). If it is supersaturated flue gas, then what would be the approximate amount of supersaturated water? (There is a conventional baffle mist eliminator at the top of the desulfurization tower.) In this way, when the flue gas is heated to 90 degrees, will the amount of heat required increase significantly?
At normal pressure and 90°C, water does not undergo a phase change; it should remain in liquid state
Firstly, at 55°C the flue gas is in a saturated state; the liquid water content can be determined based on the mist particles at the outlet of the demister. The enthalpy value needs to be calculated based on the various components, and one must calculate themselves how much heat is required, taking into account the latent heat of vaporization of liquid water
Is all the water contained in 55° flue gas calculated based on the latent heat of vaporization of liquid water?
The flue gas at 55℃ is first considered as saturated, and the required heat amount is calculated based on its average specific heat and temperature rise； Furthermore, after passing through the demister, the flue gas at 55°C contains approximately 20–40 mg/Nm3 of mist droplets. Based on the saturated vapor pressure at the temperature at which heating stops, the amount of vaporization that occurs and the corresponding heat load can be calculated.