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Technical Cement Forum / AgroWaste Firing Problem

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xxxx 27/04/2013 07:28:10

AgroWaste Firing Problem

DEAR ALL

WE ARE FACING A LOT OF COATING FORMATION INSIDE OUR ILC CALCINATOR WHEN WE FIRE AGRO WASTE . THE LOCATION OF FIRING OF AGRO WASTE INSIDE CALCINATOR(DDF) IS JUST NEAR TO FUEL MIX FIRING , AT THE SAME LEVEL OF FUEL FIRING.

FUEL MIX IS 80% PETCOKE & 20% SOUTH AFRICAN COAL .

THE COATING AREA IS NEAR THE FIRING LEVEL ALL AROUND THE PERIPHERY.SOMETIMES THE COATING FALLS & BLOCKS THE SMOKE CHAMBER WHICH RESULTS IN KILN STOPPAGE .ALTHOUGH WE DO REGULAR CLEANING BY AIR LANCING & SOMETIMES HIGH PRESSURE WATER JET.

PLEASE SUGGEST SOME TO AVOID THIS. IS THERE ANYTHING CRITICAL IN THE CHEMICAL COMPOSITION OF AGRO WASTE LIKE ALKALIES,SULPHUR ETC. OR ELSE.

WHAT TO CHECK?

PROCESS ENGINEER

123red 29/04/2013 18:02:42

To diagnose problem you need to study % sulfate, alkalies and chloride going into and out of the system in stable operation(in tonnes per hour of kg per hour) - and at some intermediate point(s), such as kiln inlet. Also, % O2 and CO in gas phase wherever you can conveniently analyse upstream and downstream of your calciner. It's probably also useful to check on the performance of your fuel preparation and firing system(s) in case there are large particles arriving or agglomerates, or an uneaven feed rate due to intermittent blockages and hang-ups/surges of material,

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