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Ciment Québec |
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Cascades |
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Molson |
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Kruger |
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IBM |
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Université de Sherbrooke |
Customer success stories
Kruger makes its processes more energy-efficient
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Kruger got involved in energy efficiency projects under Hydro-Québec's Industrial Initiatives Program – Major Customers. By replacing inefficient power-hungry equipment at its Bromont mill, the firm cut energy requirements by 50%, saving roughly 7 GWh per year for all the projects combined. |
Project 1: Replacement of primary centrifugal cleaners in approach systems
The mill's centrifugal cleaners required very high pressure differentials to operate properly, which resulted in pressure drops of 345 kPa. To compensate, a primary mixture pump was used to supply the cleaners. The greater the pressure differential, the more pumping power required and, consequently, the greater the energy expenditure.
Cleaners with a smaller diameter were installed, resulting in a reduction in pressure drops of about 160 kPa. The result is reduced energy consumption by the pumping system that supplies the three paper machines.
Project 2: Replacement of level control valves on high-consistency pulpers
A VFD was installed on the pumps so that the pumps, rather than the control valves, maintain pulper levels, thus reducing the pumping power required.
The mill's centrifugal cleaners required very high pressure differentials to operate properly, which resulted in pressure drops of 345 kPa. To compensate, a primary mixture pump was used to supply the cleaners. The greater the pressure differential, the more pumping power required and, consequently, the greater the energy expenditure.
Cleaners with a smaller diameter were installed, resulting in a reduction in pressure drops of about 160 kPa. The result is reduced energy consumption by the pumping system that supplies the three paper machines.
Project 2: Replacement of level control valves on high-consistency pulpers
A VFD was installed on the pumps so that the pumps, rather than the control valves, maintain pulper levels, thus reducing the pumping power required.
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“Working with people from Hydro-Québec was excellent from all points of view. We are ready to do it all over again.” – Denis Lafrenière, general manager of Kruger's Brompton mill |
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