Combination of e-boiler and gas boiler modernizes starch factory
The combination of an e-boiler and a high efficiency gas boiler has modernized the energy supply for this starch factory. It boosts efficiency, responds to day-ahead energy prices, helps stabilize grid imbalances and
contributes to further decarbonization.
E-boiler and gas boiler deliver top efficiency
The outdated gas boilers were replaced by a smart duo: a 20 MW high-efficiency gas boiler and a 20
MW high-voltage electrode boiler. The gas boiler is designed for 8,000 operating hours per year, while
the e-boiler runs about 2,000 to 3,000 hours annually thanks to its rapid response time.
Which boiler is activated depends entirely on
market prices. The choice is straightforward:
- E-boiler when:
› gas prices are high;
› there is a surplus of electricity. - Gas boiler when:
› electricity prices are high;
› there is a power shortage.
As always, Callens-Vyncke handled the complete balance of plant. The system is equipped with economizers, a feedwater tank, a deaerator, a blowdown tank, flash vessels, and superheaters — in short, everything needed for an optimal and efficient circuit.
In-house control system switches seamlessly between boilers
The control system was developed entirely in-house to guarantee flawless communication between the two boilers. The added requirement to react quickly to the electricity market made the setup even more complex.
On top of that, any power taken from the grid has to follow a stable curve within specific limits.
Technical characteristics
Capacity
E-boiler: 20 MW
Gas boiler: 20 MW
Steam output
E-boiler: 30 T/h
Gas boiler: 30 T/h
Working pressure
35 barg
