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A food processor contracted with Aries Chemical to review the feasibility of using membrane technology to reduce their steam boiler energy costs. Aries performed an energy audit at their facility that projected substantial energy savings by utilizing a Reverse Osmosis Membrane system for boiler feed water treatment. The food processor was using softened water as make-up water. Boiler cycles of concentration were limited to approximately 8.5 cycles. RO make-up water would allow the boiler water to be cycled up to approximately 50 cycles of concentration.
Aries’ feasibility study projected an 18 month project pay-back based upon energy savings. The food processor contracted with Aries Chemical to design, build and install a one-pass RO system to pretreat their boiler make-up water. The table below details the 46,000 ft3/day natural gas savings.
|Boiler Operating Performance before RO installation||Boiler Operating Performance with RO make-up water|
|Steam Production||1,060,000 lbs/day||1,060,000 lbs/day|
|Pressure||180 psi||180 psi|
|Cycles of Concentration||8.5 cycles||50 cycles|
|Blowdown||141,000 lbs/day||21,000 lbs/day|
|Reduction in blowdown||NA||120,000 lbs/day|
|Daily Natural Gas savings||NA||46,000 cubic ft/day|
Technical responsibilities for design, fabrication and installation were assumed by Aries Chemical. Aries’ responsibilities were as follows:
For further product and technical assistance, contact your Aries Chemical Representative or our headquarters at (315) 346-1489. Also view a printable version of this Reverse Osmosis System Case Study.
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