Process for cogasifying and cofiring engineered fuel with coal
First Claim
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1. An integrated method for varying an overall cofiring ratio of a combustion system, comprising:
- introducing a first engineered fuel and a first fossil fuel into a gasifier at a first cofiring ratio;
cogasifying the first engineered fuel and the first fossil fuel to produce syngas;
introducing a second engineered fuel and a second fossil fuel into a combustor at a second cofiring ratio;
introducing the produced syngas into the combustor;
cofiring the second engineered fuel, the second fossil fuel, and the produced syngas; and
varying the overall cofiring ratio of combustion by varying an input characteristic of at least two of the first engineered fuel, the first fossil fuel, the second engineered fuel, and the second fossil fuel, wherein the first cofiring ratio and the second cofiring ratio are unchanged.
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Abstract
Described is an integrated process of cogasifying an engineered fuel, formulated to be suitable for working under reducing environment, with coal and cofiring another engineered fuel, formulated to be suitable for working under oxidizing environment, with coal to produce electric power.
32 Citations
26 Claims
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1. An integrated method for varying an overall cofiring ratio of a combustion system, comprising:
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introducing a first engineered fuel and a first fossil fuel into a gasifier at a first cofiring ratio; cogasifying the first engineered fuel and the first fossil fuel to produce syngas; introducing a second engineered fuel and a second fossil fuel into a combustor at a second cofiring ratio; introducing the produced syngas into the combustor; cofiring the second engineered fuel, the second fossil fuel, and the produced syngas; and varying the overall cofiring ratio of combustion by varying an input characteristic of at least two of the first engineered fuel, the first fossil fuel, the second engineered fuel, and the second fossil fuel, wherein the first cofiring ratio and the second cofiring ratio are unchanged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A combustion system, comprising:
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a gasifier for receiving a first engineered fuel and a first fossil fuel at a first cofiring ratio, said gasifier operable for cogasifying the first engineered fuel and the first fossil fuel to produce syngas; a combustor for receiving a second engineered fuel and a second fossil fuel at a second cofiring ratio, said combustor further receiving the syngas from the gasifier, said combustor operable for cofiring the second engineered fuel, the second fossil fuel, and the produced syngas; and wherein the combustion system is operable to vary an overall cofiring ratio of the combustion system by varying an input characteristic of at least two of the first engineered fuel, the first fossil fuel, the second engineered fuel, and the second fossil fuel, wherein the first cofiring ratio and the second cofiring ratio are unchanged. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification