E-ON District heating project meets stringent Dutch water quality guidelines, Rotterdam, The Netherlands

WATER TECHNOLOGIES

The Client’s Needs

Veolia Mobile Water Services received an enquiry from E-ON Benelux to fill a heat storage (see photo) facility located at the Galileistraat plant in Rotterdam, with 14,000m3 of high purity water free of dissolved oxygen.

The water was treated to comply with the Dutch guidelines for district heating - DNV KEMA*, along with the European Standard for boiler water VGB-R450L (specification of EGV<0,1 µS/cm and O2<20ppb)

The Solution

By combining Veolia Mobile Water Services MORO, MODI and a REMOX technologies the customers requirements could not only be met but exceeded:

• MORO-60T: Mobile Reverse Osmosis trailer providing >95% rejection of ions from the town mains feed water

• MODI-15000T: Mobile De Ionisation trailer to further reduce the ion content ,providing a conductivity of <0.1 µS/cm

• REMOX-100C: Mobile oxygen removal system to remove any oxygen from the de-ionised water down to <20 ppb O2

E-ON

Rotterdam, The Netherlands - E-ON delivers demineralized water to the district heating of the city of Rotterdam supplying heat for 95,000 households and businesses.

The previous combined cycle power plant is being converted into a heat station ‘booster’ for (rest) heat coming from the Botlek industrial area to the district heating of Rotterdam.

Key Figures

• Headquarters in Dusseldorf Germany

• Annual sales of €39 billion

• 79,000 employees

• Operating sites in over 30 countries globally

• Over 26 million customers

Power | Case Study

© E-ON

Mobile Water Services

E-ON Rotterdam, Power Case Study

Process Description

Reverse Osmosis: MORO-60T® comprised of spiral would RO membranes to remove ions from water by reversing the natural osmosis process. The system is housed within a 40’ articulated trailer complete with pre-treatment and chemical dosing systems to enhance the process. Each unit is capable of producing 60m3/hr of purified water.

De-Ionisation: Ion exchange resins operate by exchanging H+OH (H2O) ions for the ions present in the feed water. MODI-15000T® provides two streams of mobile Cation/Anion/Mixed-bed ion exchange plant on a 40’ articulated, insulated trailer. Each stream is capable of treating 75m3/hr water, generating 150m3/hr with 2 streams in parallel, up to a quality of <0.1 µS/cm conductivity and <20ppb silica.

De-Gassing: Oxygen and carbon dioxide gas is removed from water by utilising a «hollow-fibre» membrane process in combination with vacuum and nitrogen as stripping gas. REMOX-100C incorporates a highly efficient design can operate at up to 50 m3/hr per stream, giving a total continuous output of 100 m3/h with < 10ppb O2, < 0.3 ppm CO2. The system is housed within a fully air conditioned and insulated 40ft container complete with all the necessary services.

Results

E-ON are pleased with the results:

“We regularly use Mobile Water Services for planned maintenance activities and the trailers always perform to spec. I have a great relationship with the team and no request is too much trouble for them.”

*DNV Kema (Det Norske Veritas, Keuring van Elektrotechnische Materialen te Arnhem) is part of DNV VL, a global certification and consulting firm based in Arnhem, The Netherlands. As one of the three classification and certification companies in the world specialising in energy, their district heating guidelines are a leading industry standard within the country.

Veolia Water Technologies – Mobile Water ServicesCelsiusstraat 34, 6716 BZ EDE - NL / PO Box 250, 6710 BG EDE - NL Tel: +31 (0) 318 691 661 / Mobile: +31 (0) 6 516 180 26www.aquamove.com

Benefits

Process Capacity: a continuous supply of 60m3/h

Timeliness: required volume is met in just over a week enabling E-ON to meet it’s deadline to end-users

Quality: Stringent process control by Veolia Mobile Water Services ensures high quality of water

To Budget: MWS project is done within E-ON’s budget

Supply Water

Reverse osmosis membrane

Reverse osmosis membrane

Spacer for supply

Spacer for product

Permeate

Concentrate

Permeate

Spiral wound module for reverse osmosis ( RO)

1

1

1

2

2

3

3

4

45

56

6

8

9

9

8

7

7

Na+CI-

H++ OH-

HOHH2O

OH-

OH-

OH-

OH-

OH-OH-

OH-

OH-CI-

H+

H+

H+

H+

H+

H+

H+

H+Na+

Cation Resin Anion Resin

1

1

2

3

6

8

9

10

4

5

7

1

2

3

6

8

9

104

5

7

Aqueous Stream

Vacuum Strip Gas

Cartridge

Distribution Tube

Hollow Fiber Membrane

Baffle

Collection Tube

Housing

Strip Gas

Aqueous Stream