AS:Scan Industires - a green industry for a greener future
AS:Scan Industires - a green industry for a greener future
AS:Scan Industires - a green industry for a greener future
AS:Scan Industires - a green industry for a greener future

High voltage electrode boiler

1. ELECTRODE BOILER ARRANGEMENT

Hot water is generated by circulating the boiler water through the upper chamber where the electrodes are suspended. The boiler vessel is pressurized with nitrogen or a similar inert gas system, and due to the relatively low water volume the boiler also acts as an expansion vessel. The boiler regulates on constant temperature up to its maximum power setting and continues on constant power above this setting. The output is controlled by a throttle valve that regulates the level in the upper boiler chamber.

An important parameter related to optimal function of the HVEB is the water conductivity. The conductivity is continously monitored to ensure that the boiler gives the correct output. When the conductivty exceeds the programmed setpoint, automatic blowdown is initiated. Our delivery includes the piping, control valve and heat exchanger for heat supply to the district heating cirquit.

Parat IEH Parat IEH

Dimensioner

Capaciyty (MW) 0-10
D (mm) 2100
H (mm) 4900

Capaciyty (MW) 11-15
D (mm) 2100
H (mm) 4900

Capaciyty (MW) 16-20
D (mm) 2550
H (mm) 5400

Capaciyty (MW) 21-30
D (mm) 3000
H (mm) 5800

Capaciyty (MW) 31-45
D (mm) 3100
H (mm) 6000



2. Electrode principle

The boiler consists of an outer and an inner container. Inside the inner container, which is electrically insulated from the outer shell, the electrodes are suspended. The boiler is designed for 6.0 or 11.0 kV. Higher voltage can be delivered on request. Heat is generated by ohmic resistance in the water between the electrodes.

The boiler acts as a pure ohmic resistance in the main circuit. Parat Halvorsen AS have used this concept in our electrode boilers since 1993. The output from the boiler is directly related to the immersion of the electrodes into the water volume in the upper chamber. This enables seamless regulation from 100% to 5% output. The water/container forms an insulated zero point in the star connection between the electrodes.

3. BOILER DIMENSIONS

The electrode boiler is a very compact unit. Due to the fast start up time with close to instant hot water generation there is no need for a large water volume in the boiler. Hot water is generated in the upper container by ohmic resistance between the electrodes which again requires a relatively small heat surface.

The boiler shell is insulated with 2x75mm Rockwool and cladded with aluminum or galvanized steel plates.

4. CONTROL SYSTEM

The High Voltage Electrode Boiler system is controlled by a PARAT PLC control panel.

The control panel includes a Siemens S7 PLC and a Beijer Touch panel. Communication between the control panel and top systems is by Profibus / Modbus / Ethernet communication.

Teknisk data

Kompakt design
Designed for 6.0 or 11.0 kV
Seamless regulation from 100% to 5% output
Fast start up time
PARAT PLC control panel

Download

Brochure PARAT IEH (english)
open as pdf file (english)

Brochure PARAT IEH (german)
open as pdf file (german)

Brochure PARAT IEH (norwegian)
open as pdf file (norwegian)


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