Tame the en­ergy hog of process heat

DEMM Engineering & Manufacturing - - ENERGY EFFICIENCY -

Industrial ovens and furnaces used for high tem­per­a­ture heat­ing in va­ri­ety of in­dus­tries and ap­pli­ca­tions, from alu­minium smelt­ing and oil re­finer­ies to man­u­fac­tur­ing and food pro­cess­ing, are the en­ergy hogs of your busi­ness. Now it’s time to tame this wild an­i­mal to save on fuel and to re­duce emis­sions, and the pre­scrip­tion is sim­ple: re­duce, re­cy­cle and re­cover. Here are some ex­am­ples how:

Re­duce ex­cess air. Make sure your burn­ers are op­er­at­ing at their min­i­mum ex­cess air level. Low­er­ing ex­cess air lev­els low­ers the furnaces en­ergy re­quire­ments. Re­duc­ing ex­cess air by 15 per­cent on a fur­nace run­ning at 10,000˚C will re­duce the en­ergy us­age by more than eight per­cent. That’s eight per­cent less emis­sions, and eight per­cent lower fuel costs.

Re­cy­cle the en­ergy be­ing lost to at­mos­phere by pre­heat­ing your in­com­ing load. Pre­heat­ing a load by 2,000˚C on a heat­ing fur­nace run­ning at 10,000˚C will re­duce the en­ergy us­age by more than 15 per­cent. That’s 15 per­cent less emis­sions, and 15 per­cent lower fuel costs.

Re­cover the en­ergy by pre­heat­ing the com­bus­tion air. Us­ing the ex­haust gasses to raise the com­bus­tion air tem­per­a­ture by 3,000˚C on a fur­nace run­ning at 10,000˚C will re­duce the en­ergy us­age by more than 20 per­cent. That’s 20 per­cent less emis­sions, and 20 per­cent lower fuel costs.

Not sure where to start? Con­tact us to carry out a sur­vey of your fur­nace and to get rec­om­men­da­tions for the fuel sav­ing op­tion that suits your ap­pli­ca­tion the best.

We can up­grade your cur­rent sys­tem or de­sign and sup­ply a new sys­tem to op­ti­mise the per­for­mance of your fur­nace. Among the equip­ment we sup­ply there are burn­ers, con­trols, safety sys­tems, gas trains and com­bus­tion air blow­ers from the lead­ing Euro­pean and Amer­i­can man­u­fac­tur­ers.

Con­tact Ph: 09 274 51211 or email sales@nuwayen­ergy.co.nz

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