Design of CO2 emission chimneys
Thread Content
This post was last edited by jintchinssen on 2010-11-16 at 13:17. There is a lime kiln that generates 2880 kg/h of waste gas, consisting of CO2 (with density based on standard conditions), and the temperature inside the kiln ranges from 1100 to 1200°C. The external air temperature is assumed to be 30°C. The chimney diameter is 1.5m. Question: If the flow velocity of the gas inside the chimney is to reach 10 m/s, how tall needs the chimney to be? (If the total resistance of the furnace system is required, calculate it according to conventional methods.)
There must be a specific formula for calculating the height of such chimneys. I really can’t help you determine the exact required height; I’m only skilled at building and repairing chimneys. You should reach out to some friends in design firms – they probably have the relevant information
In short, the flow rate you need is mainly determined by the pipe diameter. Once the pipe diameter is determined, the outlet flow velocity can be calculated based on the pipe length and resistance. But does the chimney need to be controlled in this regard? Its height should be related to the level of hazard posed by the exhaust gases it discharges, as well as the height of the buildings surrounding it.