Boiler Blowdown Rate

Calculate boiler blowdown rate based on steam consumption, feed water TDS concentration, and maximum allowable TDS in boiler water.

Boiler Blowdown Rate Calculator

A blowdown of the boiler is a routine operation necessary due to the increased concentration of Total Dissolved Solids (TDS) in the boiler water when producing steam.

The blowdown rate can be calculated using the formula:

qBD = qS × fc / (bc - fc)

Where:

qBD = blowdown rate (kg/h)
qS = steam consumption (kg/h)
fc = Total Dissolved Solids (TDS) in the feed water (ppm)
bc = maximum allowable Total Dissolved Solids (TDS) in the boiler water (ppm)

Calculator

Inputs

Steam Consumption (kg/h)

TDS in Feed Water (ppm)

Maximum Allowable TDS in Boiler Water (ppm)

Results

Blowdown Rate-- kg/h

Parameter	Value	Unit	Description
Steam Consumption (qS)	Input	kg/h	Amount of steam consumed in the process
Feed Water TDS (fc)	Input	ppm	Total Dissolved Solids concentration in feed water
Max Boiler Water TDS (bc)	Input	ppm	Maximum allowable TDS concentration in boiler water
Blowdown Rate (qBD)	Output	kg/h	Required blowdown rate to maintain TDS levels

Boiler Blowdown Rate | MEPKit Engineering Tools | MEPKit