Features and Benefits

Flashing: Hot, high-pressure blowdown water from each boiler is piped to individual flow control valves on the inlet manifold. Pressure drops across the flow control valve to 5-20 psig, causing the blowdown water to flash into a mixture of steam and water.
Separation Steam/Water: An entrainment baffle directs the mixture around the inside of the tank in a centrifugal motion. Efficient baffling separates the dirty blowdown water from the clean steam.
Discharge: Steam then rises through the top of the flash tank and is piped to the feedwater heater, or wherever low pressure steam is required. The remaining hot, dirty water flows out the bottom of the flash tank to a heat exchanger for additional heat recovery, or to a blow-off tank or sewer.
Heat Recovery: In addition to the heat recovered as flashed steam, the heat exchanger will transfer the remaining heat normally lost during blowdown, to the cold make-up water as it flows to the feedwater heater.

Product Offering

Flash tank heat exchangers are used when operating pressures exceed 25 psig and continuous blowdown heat recovery is desired for cost savings. They consist of an ASME approved and stamped flash tank and a blowdown heat exchanger. Water from continuous blowdown enters the tank and separates into steam and water. The steam, normally at 5 psig, can be returned to the deaerator to help meet heating needs. Hot water leaves the flash tank at temperatures of 220 °F, or more. It goes into the heat exchanger, where it heats cold makeup water entering the system. The systems quickly pay for themselves with fuel savings resulting from recycled heat that would otherwise be wasted. The Model FTE is a conventional plate and frame type blowdown heat recovery system available in sizes ranging from 10 to 20 gpm blowdown and 10 to 200 gpm makeup.

The Model AHR is available in sizes ranging from 3 to 30 gpm blowdown and 9 to 150 gpm makeup. The model AHR is a coil type flash tank heat exchanger. It is a compact, low cost alternative to the shell and tube design. The basic difference is the heat exchanger, constructed of stainless steel, is integral with the ASME approved flash tank. The space saving system includes floor supports, liquid level control, three indicating thermometers, and a safety valve as standard equipment.