12-11-2007, 11:57 PM
Ugh, just lost a mile long post. Oh well.
Rob, with out the ASF(alternative solid fuels) we burn about 20 tph of coal. We have, so far, substituted up to 8 tph with ASF.
The project consists of 4 shredders, belt lines, and feeders. The bulk of the material used is tires, whole or shredded. Other materials that have been run are carpet, chicken litter, plastics( all kinds), and straw, basically anything that has some BTU content. We completed the project about a year ago for a cost of around 7 million.
This is a Lafarge cement plant here in Calera, AL that produces 1.5 million tons of cement a year. The logistics of getting material in is run by Systech which is now owned by Lafarge. Systech has been around for many years doing resource recovery. At the plant I worked for in Alpena, MI ( a 2.5 mtpy plant) we use to burn liquid wastes also. The Alpena plant also produces 50 mega watts of power from waste heat boilers. A cement kiln typically burns hotter than an incinerator, 2600 degrees f.
I am not trying to promote incinerators but if you have a facility that is burning coal anyway it makes sense. Our emissions are lower when running ASF. My part in all this is writing the control code, creating the operator screens, and laying out the instrumentaion and control power side.
I should add that most of these materials are fairly clean, not counting the chicken litter whew!!, but some days it still looks like a landfill. It is a major effort keeping the area cleaned up.
Scott
Edited by - scott_s on 12/12/2007 04:05:03
Rob, with out the ASF(alternative solid fuels) we burn about 20 tph of coal. We have, so far, substituted up to 8 tph with ASF.
The project consists of 4 shredders, belt lines, and feeders. The bulk of the material used is tires, whole or shredded. Other materials that have been run are carpet, chicken litter, plastics( all kinds), and straw, basically anything that has some BTU content. We completed the project about a year ago for a cost of around 7 million.
This is a Lafarge cement plant here in Calera, AL that produces 1.5 million tons of cement a year. The logistics of getting material in is run by Systech which is now owned by Lafarge. Systech has been around for many years doing resource recovery. At the plant I worked for in Alpena, MI ( a 2.5 mtpy plant) we use to burn liquid wastes also. The Alpena plant also produces 50 mega watts of power from waste heat boilers. A cement kiln typically burns hotter than an incinerator, 2600 degrees f.
I am not trying to promote incinerators but if you have a facility that is burning coal anyway it makes sense. Our emissions are lower when running ASF. My part in all this is writing the control code, creating the operator screens, and laying out the instrumentaion and control power side.
I should add that most of these materials are fairly clean, not counting the chicken litter whew!!, but some days it still looks like a landfill. It is a major effort keeping the area cleaned up.
Scott
Edited by - scott_s on 12/12/2007 04:05:03