Adopting condensate recovery
Condensate recovery is the practice of collecting hot condensate from steam-using equipment and returning it to the boiler feedwater system instead of dumping it to drain. Because returned condensate is already hot and chemically treated, recovering it saves fuel, water and treatment chemicals simultaneously.
What it is
When steam gives up its heat it turns back into hot water — condensate. Recovering it means installing the traps, return lines, receivers and pumps needed to send that water back to the feed tank rather than letting it run to waste. It is one of the highest-return improvements available to any steam plant.
Why it is done
Condensate leaves the process near boiling and already free of hardness, so every litre returned displaces cold make-up water that would otherwise need heating and treating. Recovering it cuts fuel, water and chemical bills at once, and reduces the thermal and effluent load of dumping hot water to drain.
How it is done
The steam system is surveyed to map where condensate is currently lost. Steam traps are repaired or sized correctly, return piping and receivers are added, and pumps — mechanical or electric — lift the condensate back to the feed tank. Flash steam from the returning condensate is captured where a use exists, and the feedwater system is rebalanced for the higher inlet temperature.
- Map condensate losses
- Fix/size traps
- Add return piping
- Install receiver & pump
- Recover flash steam
- Rebalance feedwater
What to watch for
Oversized or failed traps flood return lines and waterhammer; ignoring flash steam throws away a large share of the available heat. Contaminated condensate must be diverted, not blindly returned, or it poisons the boiler.
Related practices
Changing over a boiler feedwater treatment programme
Establishing a steam-trap survey programme
Adopting reverse-osmosis water pre-treatment
Related topics
Steam Trap Management: Cutting Losses from Failed Traps · Steam Trap · Boiler Efficiency
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