DDIHeat Exchangers Inc www ddiheatexchangers com DDI Since

DDI-Heat. Exchangers Inc. www. ddi-heatexchangers. com DDI Since 1980

Poster

S k e t c h A n a e r o b i c D i g e s t i o n

Advantages

These 2 HX have been in continuous non-stop operation for 9 years without any maintenance

Napanee

Pembroke

C o m p a r i s o n F l i e r

Payback is possible in 1 year

E n e r g y S a v e d ( 1 5 Y e a r s )

Energy ROI

Electricity Cost

C o g e n e r a t i o n

DDI HX

D D I O u t li n e

T u b e D i s a d v a n t a g e s – H e a t A r e a

T u b e D i s a d v a n t a g e s L e n g t h

T u b e D i s a d v a n t a g e s S l u d g e

D D I S k e t c h w / a d v a n t a g e s

SPIRAL technology gets BLOCKED, Max. gap is only 1” and has pins for other liquid (no % solids there). - 1“-

TUBE Technology cannot have same flow for both liquids, and 3” gap each, at the same time.

Drawing

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.

Pembroke Direct Sludge-to-Sludge • From: David Atkinson • • Sent: September 7, 2007 11: 23 AM To: 'erwin@ddi. ca' Subject: Letter of Reference 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 thirty’s 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. David Atkinson City of Pembroke Utilities Superintendent Office 613 -735 -6821 ext. 1490 Fax 613 -732 -7028

Doors opened after 8. 5 years

The Gaskets after 8. 5 Years

Inside – Clean and without damage after 8. 5 years

Viscosity Influence on required area

Representatives

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

Sample Quote

Tulsa OK, Via Ashbrook and HDR

Rialto- Ener. Tech via HDR 11 Heat Exchangers- all phases.

Molasses with 65 % Solids Vitalix

DDI HX and Boiler set DDI in Pontiac with Boiler combined- (Cover removed)

Building’s 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.

Man-Hole (video on the web)

Davit Arm – swings door in limited space

D D I L o g o F i n a l