Blower energy recovery heat exchanger

Monday, 28 November, 2005 | Supplied by:

Lackeby Products has developed a water/air heat exchanger to extend the life of membranes used in aeration tanks at sites such as wastewater treatment plants. The unit recovers or regains energy heat from the blower-produced air stream which then can be used for the heating for ventilation systems or tap water.

The VLV series heat exchanger consists of a circular pressure vessel containing coils of copper. The cooling agent flows within the copper coils while hot air from the blower(s) flows around the copper coils that are arranged as the mantle area of a cylinder. The heat exchanger has a coaxial installed cooling system.

Each heat exchanger is completely fabricated of stainless steel plate, except the copper coils, and is completely enclosed and self-supporting. Air and water piping connections are 150 psi (PN10) standard flange connections. The front and back are flanged and permit full access for cleaning and inspection of the inside of the unit. The mantle is coupled with a flange, which provides ease in dismounting for inspection and maintenance.

The process benefits include: extends the life of membranes, thereby reducing maintenance costs; reduces pressure loss and eliminates sensitivity to clogging on the air side; and simplifies installation in both new and existing plants.

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