How is the water injection volume for flue gas quenching devices calculated?
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For a flue gas quenching tower, the following values are known: the inlet flue gas flow rate is 25,481 cubic meters per hour (under normal operating conditions), the temperature of the flue gas is 550 degrees Celsius (with a enthalpy of 800 KJ). Softened water is used to reduce the temperature of the flue gas, resulting in an outlet temperature of 200 degrees Celsius (with an enthalpy of 280 KJ). The temperature of the inlet water is 25 degrees Celsius. It is necessary to calculate the amount of water required.
Recycled water can be designed using nozzles
The flue gas exit temperature in the graphite flue gas quench tower that we use is usually 85 degrees, while your system requires 200 degrees; this necessitates precise control over the amount of vaporization of the spray liquid.
25481/（550+273）×273×（800-280）/4.186/（666-25）=1640 kg/h Please advise
The amount of smoke is very small; roughly over 1 ton of water is required
The amount of smoke is not large; around 1 ton of water is required
Basically, it all turns into steam and is carried away with the smoke, so it cannot be recycled
What are the values of 800-280 666-25?
Let’s do a heat balance calculation; roughly speaking, the heat released as the flue gas cools is equal to the heat required for the spray water to vaporize.