The Region of Waterloo, through its Consultants AECOM, has awarded Contract #4, in January 2012 to complete a $ 118 Million Project of the WATERLOO Wastewater Treatment Facility. Directrik Inc. will be supplying (2) DDI Heat Exchangers with Rectangular channels, and very wide gaps, capable of providing 5 MBTUH each.

Aecom has based their Heat Exchanger design on DDI’s

“Rectangular, Square, Cube”TM Heat Exchangers because of the Tight Space and NON plug requirements.

Several Heat Exchangers were considered including Tube and Tube Heat Exchangers for this project. As this was a fast track project, Drawing submittals, Delivery and Price played a major part in the Mechanical Contractors decision to go with DDI Heat Exchangers Inc.

About DDI.

DDI has been in business since 1980 and is proud to have 38 Representatives to cover North America.

(A list can be found at www.ddi-heatexchangers.com).

DDI System has been tested in North America for more then 9 years of continues use without any plugging what so ever.

DDI has the following main advantages: large heat transfer surface, small foot print, more turbulence, gaps of 3or 5 or more, inches to limit the sludge blockage, full access to internals via doors, Davit Arms for swinging the doors to save space, optimum height for fast flow, realistic viscosities calculations, thick layers against abrasion (0.25” min), a backup that is also able to use the Sludge-to-Sludge heat exchangers for the Water-to-Sludge process, and very, very low maintenance.

Erwin Schwartz / B. Eng. / President
DDI- Heat Exchangers Inc

“RECTANGULAR, SQUARE, CUBE” TM

Don’t Waste the Waste, Use DDI HEAT RECOVERY.

DDI wants to congratulate Sam Directo and his team in Directrik Inc for the 3 Heat Exchangers installation in TWO Niagara Region Waste Water Treatment Plants.

Some pictures are attached showing the DDI Heat Exchanger being inserted in a VERY Narrow Hatch and in the Narrow Corridors.

Erwin Schwartz / B. Eng. / President
DDI- Heat Exchangers Inc, (since 1980)

Tel: 514-696-7961, Fax: 514-696-8344
Email: erwin@ddi.ca WebPage: www.ddi-heatexchangers.com

DDI incorporated a Pig Cleaning System to work with the DDI Rectangular channels.

The Advantages having the Pig Cleaning System are:

1- Allows for cleaning via a “Pig” with out a need for Sludge flow Drainage.

2- Allows for cleaning via a “Pig” with out opening the DOORS.

3- Allows for cleaning via a “Pig” the Internal of a Rectangular channeled Heat Exchanger, to reduce the Fouling and improve the Heat Exchangers efficiency.

4- It can be added to any DDI standard Dia flange.

5- It can be used in the Water side too.

6- Allows for launching of the Pig and Extraction/Catching it too with the same parts (reverse order).

7- It avoids the risk of “losing” the Pig in the pipes, or the pig being stuck in a pipe.

8- Allows for having a clean (no liquid) working area, to insert and remove the Pig. (for the benefit of the Technicians). I.e. The cavity could be emptied and cleaned with fresh water.

9- Allows for a NO OBSTRUCTION in the flow of the Sludge, while the process is on.

10- Practical modifications designed manufactured by DDI utilizing available Valves.

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DDI In WEFTEC again
We want to thank for all who dropped by at our booth in WEFTEC New Orleans Show, to hear about our NON PLUG Heat Exchangers and HEAT RECOVERY and innovated equipment.