Airflow Calculation for Baghouse Inlet/Outlet Temp 400F/210F

In summary, the conversation discusses the inlet and outlet temperature of a baghouse operating under negative pressure, with a volume of air measuring at 10,500 acfm. The condition of the baghouse is poor and there is no significant water present. The 10,500 acfm is measured at the fan discharge and a mixing process is considered to determine the actual volume of process air and inleakage air. The resulting equations give a process air volume of 5,720 acfm and an inleakage air volume of 4,780 acfm. The question is unclear on what the actual volume refers to and a diagram is requested for further understanding.
  • #1
DC52
2
0
The inlet temperature of a baghouse under negative pressure is 400 F and the outlet temperature is 210 F. The volume of air is 10,500 acfm. (baghouse is in poor condition). How do I determine the actual volume given this information?
 
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  • #2
Any significant water present? Is the cooling due only to air infiltration? Is the 10,500 acfm measured at the inlet?
 
  • #3
It is a dry day, no rain, or mositure in the inlet ductwork. The 10,500 acfm is measured at the fan discharge, which is downstream from the baghouse.
 
  • #4
I considered a simple mixing process of 400F process air and 70F inleakage air. Process air density = 0.0462 lb/ft3. Inleakage air density = 0.075 lb/ft3. Outlet air density = 0.0593 lb/ft3. All air streams heat capacity = 0.25 Btu/lb-F. A material and energy balance gives two equations and two unknowns. I got 5,720 acfm for the process air and 4,780 acfm for the inleakage air. NOTE: Fan power was not included. If known it can be added to the energy balance.
 
  • #5
I'm having trouble understanding the question. Actual volume of what? The bag house? The airflow through the bag house? A diagram would help too.
 

FAQ: Airflow Calculation for Baghouse Inlet/Outlet Temp 400F/210F

What is the purpose of calculating airflow for baghouse inlet/outlet temperature?

Airflow calculation for baghouse inlet/outlet temperature is important for designing and maintaining efficient baghouse systems. By accurately calculating the airflow, the appropriate size of the baghouse can be determined to ensure proper filtration and minimal pressure drop.

What factors affect the airflow in baghouse systems?

The airflow in baghouse systems can be affected by several factors, including the size and design of the baghouse, the type and condition of the filter bags, the temperature and humidity of the air, and the type and characteristics of the dust being collected.

How is the airflow in baghouse systems measured?

The airflow in baghouse systems is typically measured using a variety of instruments, such as an anemometer or a pitot tube. These instruments measure the velocity and pressure of the air, which can then be used to calculate the airflow rate.

What is the recommended airflow rate for baghouse systems?

The recommended airflow rate for baghouse systems varies depending on the specific system and application. However, in general, a minimum airflow rate of 0.5 to 1.5 meters per second is recommended for efficient filtration and minimal pressure drop.

Why is it important to maintain the correct airflow rate in baghouse systems?

Maintaining the correct airflow rate in baghouse systems is crucial for effective dust collection and preventing system failures. A lower airflow rate can result in poor filtration and increased pressure drop, while a higher airflow rate can lead to excessive wear and tear on the system and increased energy costs.

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