DDI-HeatExchangers Inc. www.ddi-heatexchangers.com DDI Since 1980

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DDI-HeatExchangers Inc.www.ddi-heatexchangers.co
mDDI Since 1980
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Poster
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Sketch Anaerobic Digestion
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Advantages
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These 2 HX have been in continuous non-stop
operation for 9 years without any maintenance
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Napanee
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Pembroke
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Comparison Flier
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Payback is possible in 1 year
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Energy Saved (15 Years)
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Energy ROI
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Electricity Cost
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Cogeneration
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DDI HX
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DDI Outline
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Tube Disadvantages Heat Area
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Tube Disadvantages - Length
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Tube Disadvantages - Sludge
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DDI Sketch w/ advantages
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SPIRAL technology gets BLOCKED, Max. gap is only
1 and has pins for other liquid (no solids
there). - 1-
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TUBE Technology cannot have same flow for both
liquids, and 3 gap each, at the same time.
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Drawing
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Vitalix 65-70 Solids Molasses

• 12 Sep 2007
• Vitalix Inc. has been using the DDI heat
  exchanger almost a year now with very positive
  results. Raw molasses at 65 to 70 solids is
  running on one side and hot water on the other.
  We have had no problems with plugging or pressure
  build up. We are also very pleased with the
  effectiveness of this unit in heat transfer.
  Thank you for your help and support.
• Plant Mgr.  Doug Olson
• 308-762-8358
• Vitalix Inc.
• Alliance NE.

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Pembroke Direct Sludge-to-Sludge

• From David Atkinson Sent September 7, 2007
  1123 AMTo 'erwin_at_ddi.ca'Subject Letter of
  Reference
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• The Pembroke Pollution Control Centre is using
  the DDI Heat Exchanger with very positive
  results.  Raw sludge with an average temperature
  between 11 C to 19 C flows through one side of
  the heat exchanger and re-circulated sludge from
  the digesters with temperatures ranging in the
  high thirtys flows through the opposite side of
  the heat exchanger.  This has resulted in
  substantial savings as the raw sludge is
  increased in temperature prior to entering the
  digesters at no expense to the City sewage
  system.  After almost two years of operation no
  plugging has occurred and it works as per
  specification.  I am very satisfied with the
  results of this piece of equipment. 
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• David Atkinson
• City of Pembroke
• Utilities Superintendent
• Office 613-735-6821 ext. 1490
• Fax    [phone]

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Doors opened after 8.5 years
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The Gaskets after 8.5 Years
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Inside Clean and without damage after 8.5 years
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Viscosity Influence on required area
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Representatives
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Links

• Personnel
• (http//www.ddi-heatexchangers.com/resume.htm)
• Other Products
• (http//www.ddi-heatexchangers.com/other_products.
  htm)
• DDI can supply Parker Boiler Pumps too
• DDI has PIG CLEANING option

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Sample Quote
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Tulsa OK, Via Ashbrook and HDR
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Rialto- EnerTech via HDR

• 11 Heat Exchangers- all phases.

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Molasses with 65 Solids

• Vitalix

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DDI HX and Boiler set

• DDI in Pontiac with Boiler combined- (Cover
  removed)

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Buildings Sewage Heat Recovery

• RECOVERING HEAT from the Hot liquids leaving
  the Suites (i.e. Sewage with Solids) at about
  20-28 deg C.
• Directly to
• Cold Water entering the Building before the
  Boiler, at about 2-10 deg C.

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Man-Hole (video on the web)
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Davit Arm swings door in limited space
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DDI Logo - Final