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energy discharge from laundry
Laundry cleans up with energy recovery system.
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Problem:
A large Laundry found that the energy they discharge after processing accounted for almost 35% of their total energy bill furthermore, the water discharged represented 20% of their services bill and increasing rapidly. Dunlop Design Engineering Ltd were appointed to determine which energy saving technologies should be installed by the company and which were the most cost effective to be used.
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Solution:
After a detailed survey and subsequent analysis of their requirements, Dunlop Design Engineering
concentrated on the energy that could be recovered from their waste water systems. The Laundry
had been heating water from a cold water source. The cold water was heated before being used for
the processing and then it was discharged after use into the drain. As this practice can normally
equate to a range of 25% to 50% of the energy cost of the process, Dunlop recommended that they
introduce a KEMCO Wastewater Heat Recovery System
to capture the heat from the wastewater to preheat the incoming cold water.
Flash steam was discharged from the boiler and by recover and condensing this flash steam a further
10% of the energy could be recovered.
Water Recovery was also suggested. Recovery of 50% of the water was the optimum return on investment
and specialists Kemco Air-Backwash Filtration System was proposed.
The Kemco System uses specialised tubing in shell heat exchanges rather than the traditional plate heat
exchanges, which can cause blocking and loss of thermal efficiency due to fouling. The tubular system
is much more efficient than the plate heat exchange system and approximately 80% of the waste water
energy was recovered.
The Kemco Vent Condenser has the advantage of only condensing the excess steam and not cooling the
condense.
The Kemco Air Backwash Filtration System has the advantage of using air to backwash the media rather
than water thus saving considerable water
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Saving:
In this particular case study in a large laundry processing plant, Dunlop Design Engineering found that a total of 1,200kW of energy was being discharged. The total energy bill was £90,000 pa and the energy discharged costs the company £31,200 pa amounting to almost 35% of the total bill. The Climate Change Levy accounts for approximately 10% or £3,120 of this.
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For further details please contact us
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