Atmospheric semi – deaerators ADG
The ADCATherm atmospheric semi-deaerators are designed to heat boiler feed water and to reduce oxygen and carbon dioxide (oxygen values in the feed water of less than 1,6 mg/L can be achieved). Remaining oxygen can be completely removed using oxygen scavenging chemicals.
Basically, the complete system consists of a storage vessel, a deaeration head section and a vent.
- Prevents energy wasting.
- Easy to install.
- Can be installed on new or existing systems.
- Reduces the flow of flash steam from the vessel venting pipe.
- Long life expectancy.
- Complete stainless steel construction.
- Complete system including all the necessary equipments.
- Vent condenser for energy recovery.
- Steam boiler feed water
- ADG – Deaerator head
- Flanged EN 1092-1 or ASME.
- ISO or NPT threaded sockets.
- Different connections on request.
- Carbon steel with internal stainless steel components.
- Deaerator head – vertical installation.
- Storage vessel – cylindrical horizontal design.
- Final dimensions and connections according to the drawing supplied after order confirmation.
Hot return condensate is injected in the bottom of the storage vessel using an adequate sparger pipe and softened make-up water is introduced in the deaerator head to be heated by a contact cascade flash steam heating system (counter-current flow) coming from the vessel. A part of the dissolved gases is liberated from the water at this point, and then to the atmosphere, trough the flash steam vent line.
The semi-deaerated water then falls to the storage vessel below, where a steam injection system will provide an additional deaeration.
The complete unit is supplied, including all the necessary instrumentation for temperature and level control, to be described in our offer, depending on the operation conditions (see Table 1).