Immersed electrode boilers can produce steam, hot water or superheated water.
Each boiler has one or two power intakes per phase; each connected to a dedicated electrode. Each electrode has a corresponding counter-electrode, with the entire assembly completely immersed below the water level.
When the regulating tube covers the electrode, the flow of electrical current to its counter-electrode decreases. This reduction limits the intensity of the Joule effect and, as a result, reduces heat or steam production. Raising or lowering the regulating tube takes less than a minute, so when the boiler is at nominal temperature, switching from zero to full load takes no longer than that.
Regardless of the load level, one or two circulation pumps ensure a constant flow of water to the jet nozzles located opposite each electrode, enabling continuous, uniform and reliable cooling throughout the entire operating phase.
The lower part of the boiler shell contains water, while the upper part contains steam.
The regulating tube is at the lowest point, completely masking the electrode from its counter electrode. Only the surrounding water allows a small amount of electrical current to flow from one to the other.
The regulating tube is in a central position, exposing 50% of the electrode to the counter electrode, which allows the electric current to flow relatively easily from one to the other.
The regulating tube is at the highest point, fully exposing the electrode to its counter electrode, allowing all the electrical current to flow easily from one to the other.
The boiler shell is fully filled of water.
The regulating tube is at the lowest point, completely masking the electrode from its counter electrode. Only the surrounding water allows a small amount of electrical current to flow from one to the other.
The regulating tube is in a central position, exposing 50% of the electrode to the counter electrode, which allows the electric current to flow relatively easily from one to the other.
The regulating tube is at the highest point, fully exposing the electrode to its counter electrode, allowing all the electrical current to flow easily from one to the other.
| DESIGN | IMMERSED ELECTRODES | |
|---|---|---|
| MEDIUM | STEAM | HOT WATER |
| MAXIMUM CAPACITY | 50 MW | 60 MW |
| INPUT VOLTAGE | 6 - 24 kV | |
| OPERATING PRESSURE | 8 - 29 barg | |
| BOILER WATER CONDUCTIVITY | 20 - 400 µS/cm | |
| STEAM QUALITY | 99,9 % | N/A |
| MODULATION RANGE | 10 - 100 % | |
