How is the water-vapor ratio in coal-water slurry conversion calculated?
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How is the water-vapor ratio in coal-water slurry conversion calculated? The deviation between the results obtained through pressure division calculations and those in the design institute’s data sheets is quite large; how can one find the compressibility factor values? Which calculation method is more authoritative~
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Method for calculating the water-gas ratio: As an example, if the pressure of the water gas is 3.40 MPa (gauge pressure), its temperature is 214.8°C, and the flow rate of the wet water gas is 180,000 Nm3/h, then the water vapor ratio is as follows: By referring to the table showing the relationship between saturation temperature and pressure of water vapor, it can be determined that at 214.8°C, the saturated vapor pressure of water vapor is 2.0 MPa (gauge pressure). Vapor ratio = partial pressure of saturated water vapor / partial pressure of water gas = (2.0 + 0.1) / (3.4 + 0.1 – 2.0 – 0.01) = 1.43
This algorithm has a significant deviation from reality; should factors such as compression factors be considered, and how can it be corrected?~
The water-vapor ratio calculated using Raoult’s law is approximately 20% too low.
I really don’t know how to correct this; I only know that simulation using Aspen Plus is relatively accurate.