Elysator - Boiler Installation

Boiler Installation

Boiler water treatment

The Elysator should be located preferably as

shown on the illustration (fig. 14-1). Both suction

and discharge line are to be connected beneath

the level of �low level alarm� to the hotwell. A

separate circulation pump pushing water over

the ELYSATOR has to be installed with suction

from the hotwell as low as possible.

The water flow needs to be adjusted with the

regulating valve after the flow meter, while the

ball valve on the inlet and outlet remains fully

open.

Mild steel pipes (galvanized pipes are not

permitted) with a diameter not less than 1� shall

connect the Elysator to the system or as per the

size specified for each type of Elysator.

We underline the importance that the Elysator

should be located as low as possible in relation

to the hotwell (preferably on the deck below the

hotwell). The idea is to have the normal water

level in the Hotwell above the top of the Elysator

to get a net positive head and to avoid build-up

of an air pocket in the Elysator.

Should the top of the Elysator be approximately

the same height as the normal water level in

the Hotwell, a gooseneck should be made on the

discharge line of the Elysator, to avoid build up

of an air pocket in the Elysator. The height of the

gooseneck should be at least half a meter above

the top of the Elysator.

Also when starting the Elysator, the circulation

pump should be started with both the inlet and

discharge valves fully open, but the flow

regulating valve should be fully closed. At this

time ensure that the automatic air vent on top of

the Elysator is open. When water starts to come

out from the air vent (after all the air in the

Elysator tank is vented), then slowly open the

flow regulating valve till the desired

(recommended) flow is achieved.

The hotwell temperature should be kept

above 80 deg C to minimise the oxygen content.

When the boiler is idle preferably should be

kept under some small steam pressure (about

3 bar). If the boiler is not under pressure then

the Elysator circulating pump can be fitted with

a recirculating line to the boiler filling line with

a valve and back from the boiler drum, thereby

keeping the boiler always full, with treated water

circulating through it. Of course the Elysator is to

be run constantly during this time.