Blowdown benefits
When you use a lot of water and you have water coming in and going out, you don't want any debris to attach to the sides of the wall. Performing a boiler blowdown removes impurities like solid sludge and suspended solids that build up in the water, preventing scale, corrosion and foaming. As you control these impurities, you increase boiler efficiency, equipment lifespan and safe operation.
Perform blowdowns regularly
Make sure that you have bottom blowdown, especially if you have a steam boiler or poor water quality. Surface blowdown is automated, so perform that more frequently or continuously. With low-pressure boilers, you want to do it once or twice a week. Higher-pressure systems can benefit from 4 to 12 hours between blowdowns.
Other considerations
The specific frequency of blowdowns depends on the type, operating conditions, quality of the feedwater, age of the boiler and any other components that might contribute to the need for additional blowdowns.
Common mistakes
Common boiler blowdown mistakes to avoid include:
- Leaving blowdown unattended
- Incorrect valve sequencing
- Blowing down too frequently or infrequently
- Improperly sized blowdown lines
Also, if you don't pump the quick opening valve, it can lead to water hammer and improper disposal of blowdown water.
Blowdown more efficiently
Ways to improve blowdown efficiency include heat recovery systems, economizers and other measures to capture and reuse the energy from the blowdown water. Also, you can use digital monitoring systems for remote access and artificial intelligence (AI) to implement predictive maintenance.