Blowdown Heat Recovery Package

Blowdown Heat Recovery System saves energy and water

The Alstrom Packaged Blowdown Heat Recovery System saves energy and water in steam boilers and other steam generators. The packaged unit can be installed in any new or existing steam generator system requiring minimal piping. Blowdown water enters the built-in flash steam separator, with segmental baffles where two phase flow is separated to flash steam and drain water. The heat transfer process occurs in the Alstrom Double Tube Bundle Heat Exchanger “TBD.” Make-up water passes through the shell side of the heat exchanger. The heat energy of the blowdown water is transferred to the make-up water in three steps. The drain water flows through the tubes of the left tube bundle, providing the initial heating of make-up water. Flash steam is partially condensed on the external surface of the shell of the heat exchanger and further in the tubes of the right tube bundle, providing additional heating of make-up water. The Alstrom Blowdown Heat Recovery System recovers 94% and more of heat normally lost. The shell and tubes of the Alstrom Double Tube Bundle Heat Exchanger “TBD” are fabricated from high quality 316 stainless steel, resulting in long lasting, trouble-free operation. This simple stand-alone design permits a high level of heat recovery from drain water and flash steam at minimal cost. The actual sizing of the system and its components depends on boiler performance, TDS concentration in make-up and boiler water, and the percentage of condensate returning to the boiler.

Standard Features

• Saves energy and water in low pressure steam boilers and generators, with a small ratio of flash steam-to-drain water in the blowdown
• Easily installed in any new or existing steam generator system
• Recovers up to 94% of heat normally lostPermits a high level of heat recovery from drain water and flash steam at minimal cost
• Compact size for convenient placing
• Removable tube bundle for easy inspection and cleaning
• Quick return on investment by significant fuel savings