For over 75 years, Lockwood Products has been designing high quality custom boiler deaerators for commercial and industrial boiler systems while providing superior customer service at an economic price. All boiler deaerator tanks are available in both the vertical and horizontal orientations. Deaerators are designed to use steam heat to remove dissolved gasses that are not condensable from a boiler’s feedwater, protecting the system as a whole from corrosion.
Type SS (Spray Type)
The Lockwood Model SS deaerator is a “tank car” design spray scrubber deaerator. The vessel includes a vertical deaerating section and a horizontal storage section. Lockwood Model SS deaerators are designed to reduce the dissolved oxygen content of the feedwater to no more than 0.005 cc/liter (7 ppb) and reduce the titratable free carbon dioxide to zero. To do this, the feedwater goes through a two-stage mechanical deaeration process. The incoming water is injected into a steam atmosphere in the vertical section of the deaerator via stainless steel spray nozzles. The nozzles create a hollow conical spray pattern which results in a large surface area allowing rapid heating of the water. As the water approaches saturation temperature, the dissolved gases are released by the water and carried away by the steam. A majority of the corrosive gases are removed before the water strikes any steel surfaces within the deaerator. The non-condensable gases are then vented from the deaerator through a stainless steel vent pipe located on the top of the vertical section. A valve and orifice are used to control the vent rate. The hot deaerated water then passes through steam scrubber section of the deaerator. High velocity steam is forced through the water causing vigorous scrubbing of the remaining dissolved gasses.
Type SSL (Low Profile Spray Type)
The Lockwood Model SSL deaerator is a low profile spray scrubber deaerator. The vessel includes a deaerating section that is integral to the horizontal storage section. Lockwood Model SSL deaerators are designed to reduce the dissolved oxygen content of the feedwater to no more than 0.005 cc/liter (7 ppb) and reduce the titratable free carbon dioxide to zero. To do this, the feedwater goes through a two-stage mechanical deaeration process. The incoming water is injected into a steam atmosphere in the top of the deaerator via stainless steel spray nozzles. The nozzles create a hollow conical spray pattern which results in a large surface area allowing rapid heating of the water. As the water approaches saturation temperature, the dissolved gases are released by the water and carried away by the steam. A majority of the corrosive gases are removed before the water strikes any steel surfaces within the deaerator. The non-condensable gases are then vented from the deaerator through a stainless steel vent pipe located near the top of the vessel. A valve and orifice are used to control the vent rate. The hot deaerated water then passes through steam scrubber section of the deaerator. High velocity steam is forced through the water causing vigorous scrubbing of the remaining dissolved gasses.
Type SSLD (Low Profile Dual Tank Spray Type)
The Lockwood Model SSLD deaerator is a dual tank design, pairing an SSL deaerator (low profile spray scrubber design) with a surge tank. The surge tank minimizes thermal shock to the deaerator by providing a location for make-up water to blend with the returned condensate. This blended feed water is then supplied to the deaerator. An SSLD design is often times considered when space is limited.
Type ST (Tray Type)
Lockwood’s Type ST boiler deaerators utilize pressurized operation to decrease water oxygen content to 0.005 cc/Liter and can handle water capacities at up to 1,000,000 lbs/hr. For functionality, surge systems and stainless steel trays are available as optional accessories.
Type AD (Atmospheric Deaerator)
Lockwood’s Type AD boiler deaerators are able to decrease water oxygen content down to as low as 0.005 cc/Liter and can support water flow capacities at up to 100,000 lbs/hr. With the system’s complete dual-compartment receiver and corrosion-resistant lining, Type AD deaerators are designed to permit gravity returns directly into the receiver. Lockwood’s Type AD deaerators also incorporate low NPSH pumps to minimize headroom requirements and oxygen is vented directly into the atmosphere.
