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Applications
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Case Histories
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Completed Projects
Boilers
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Puget Sound Naval Shipyard
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 Direct Contact LLC (DCLLC) installed a Hydrothermal Recovery (HTR) system on the combined
exhaust flue of three 100,000 LB/HR, natural gas-fired boilers in the U.S. Navy’s
shipyard. The HTR system uses a direct-contact heat exchanger to recover
energy and water from 220°F (137°F wet-bulb) exhaust to boiler make-up water.  The
make-up water is then heated further upstream of the direct-contact unit, through
an indirect, gas-to-water heat exchanger that cools the flue gas (32,000 ACFM) from
285°F to 220°F. Overall, make-up water (112,500 LB/HR) is heated from 55°F to 125°F.
Energy recovery from this system approaches 8.8 million BTU/HR, with capacity to
do much more, if the U.S. Navy chose to do so. The current system bypasses one-third
of the flue gas without sending it through the heat exchanger and another 1/10th
of the gas bypasses the direct-contact unit.
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Pactiv
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Pactiv Corporation in Red Bluff, CA is one of the nation’s largest food packaging
companies with 2009 sales exceeding $3 Billion. Their moderately sized boiler produces
25,000 LB/HR steam with a flue gas exhaust of 32,800 LB/HR at 260°F, which is approximately
11% water vapor. DCLLC installed a Hydrothermal
Recovery system (HRV) that extracts enough energy
to heat approximately 21,000 LB/HR of their filtered make-up water from 60°F to
124°F. Total energy savings exceed 1.3 million BTU/HR and 832 LB/HR water. (Testimonial)
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Direct Contact – Hydrothermal Recovery Unit water being pumped to processes.
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