The L/G ratio is the amount of liquid used per volume of gas. Increasing the liquid flow generally improves removal efficiency but increases the pressure drop and operating costs. Most scrubbers operate in the range of 5 to 50 gallons per 1,000 cubic feet of gas. Why Excel is the Best Tool for Scrubber Design
For example, with a gas flow of 5,000 m³/h and a velocity of 2 m/s, the required diameter would be approximately 1.0 meter.
A complete packed column scrubber design sheet should also include pressure drop calculations, which can be performed using the generalized pressure drop correlation. For dry packing, the outlet gas flow rate can be calculated based on packing height and system geometry.
): Expressed in actual cubic feet per minute (ACFM) or cubic meters per hour ( scrubber design calculation excel best
Suggested helper cells:
ΔP=α⋅10β⋅L′⋅(Gdesign)2ρgcap delta cap P equals alpha center dot 10 raised to the exponent beta center dot cap L prime end-exponent center dot the fraction with numerator open paren cap G sub d e s i g n end-sub close paren squared and denominator rho sub g end-fraction Keep between 150 to 400 Pa per meter of packing ( If the calculated
Whether you are dealing with a (like an acid-base neutralization) or a pure physical absorption system The L/G ratio is the amount of liquid used per volume of gas
This is where the pollutant is actually removed. The height depends on how easily the gas dissolves into the liquid.
NTU: This represents how difficult the separation is. It is calculated based on the log-mean concentration difference between the inlet and outlet.
Use Excel’s comment feature or a dedicated "Notes" column to explicitly state assumptions, such as assuming ideal gas behavior or isothermal operation. Why Excel is the Best Tool for Scrubber
Determination of the Height of a Transfer Unit (HTU) and Number of Transfer Units (NTU) to calculate the total packed bed height.
: Total pressure drop includes losses from dry packing, liquid spraying, and internal supports. A common design target is an initial drop of cap H sub 2 cap O of packing. Best Practices for Excel Design Sheets