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Efficient water treatment for district heating

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Denmark

A success criteria for good water treatment in district heating systems is optimum technical and economical operation both in the short and in the long run. Likewise, low chemical consumption is a success criteria, since the environment will be the least stressed by leakage of district heating water and at the same time, the risk of corrosion will be reduced.  

This means:
- Minimization of corrosion and formation of deposits.
- Optimum plant and operating economy.
- Minimum maintenance costs.
- Minimum internal and external environmental impact.

SILHORKO-EUROWATER has designed and supplied a new plant for producing makeup water for the district heating grid in Aalborg, Denmark. The plant is a vital part of Aalborg district heating’s maintenance plan, allowing the main makeup production facility at another location to be shut down on a regular basis for maintenance.

The plant consists of chemical-free solutions with high water utilization. More specific an UPCORE softening unit and a reverse osmosis unit. The RO unit is an RO-PLUS unit, optimized for high water recovery and low energy consumption in order to minimize operational costs. RO-PLUS units are designed for a recovery rate up to 90% compromising neither the reliability nor the water quality. The demineralized water is stored in a 25 m3 clean water tank which also acts as a buffer.

SILHORKO-EUROWATER was selected as a supplier because the solution could provide the lowest Total Cost of Ownership (TCO) over a period of 15 years.

Technical data
• Flow: 25 m³/h
• Conductivity: 10 µS/cm

Units in plant
• Softening unit UPCORE SLC 1802-F
• RO-PLUS reverse osmosis unit C3-18+3
• 25 m³ clean water tank
• Pumping units
• On-line supervision of hardness

Date of release: