Engineered fuel feed stock useful for displacement of coal in coal firing plants
View Patent ↗Disclosed are novel engineered fuel feed stocks, feed stocks produced by the described processes, and methods of making the fuel feed stocks. Components derived from processed MSW waste streams can be used to make such feed stocks which are substantially free of glass, metals, grit and noncombustibles. These feed stocks are useful for a variety of purposes including co-firing with coal and as substitutes for coal.
1. A fuel feed stock, consisting essentially of MSW, the MSW, prior to thermal conversion, having
a carbon content of about 70% (w/w) to about 80% (w/w);
a hydrogen content of about 5 (w/w) to 10% (w/w);
a moisture content of less than 10% (w/w);
wherein the feed stock has an O/C ratio of between about 0.05 to about 0.12;
wherein the MSW contains biodegradable and non-biodegradable materials; and
wherein the feed stock contains substantially no glass, metals, grit, and noncombustible waste.
2. The feed stock of claim 1 , wherein the feed stock has a sulfur content of less than about 2% (w/w).
3. The feed stock of claim 1 , wherein the feed stock has a HHV of between about 9,000 to 15,000 Btu/lb (dry basis).
4. The feed stock of claim 1 , wherein the feed stock has a volatile matter content of about 40% (w/w) to about 80% (w/w).
5. The feed stock of claim 1 , wherein the feed stock has a chlorine content of less than about 1% (w/w).
6. The feed stock of claim 1 , wherein the engineered fuel feed stock is comminuted.
7. The feed stock of claim 1 , wherein the engineered fuel feed stock when combusted produces less harmful emissions as compared to the known level of harmful emissions of coal when combusted.
8. The feed stock of claim 1 , wherein the engineered fuel feed stock when combusted produces less sulfur emission as compared to the known level of sulfur emissions of coal when combusted.
9. The feed stock of claim 1 , wherein the engineered fuel feed stock when combusted produces less GHG emissions as compared to the known level of GHG emitted of coal when combusted.
10. The feed stock of claim 1 , wherein the engineered fuel feed stock further comprises an ash content of about 5% (w/w) to about 10% (w/w).