The present disclosure generally relates to the introduction of a liquid biomass in heating systems such as commercial boilers in order to reduce dependence on petroleum-based heating fuel oils as a source of combustion fuel. More specifically, the present disclosure is directed to systems, methods,
The present disclosure generally relates to the introduction of a liquid biomass in heating systems such as commercial boilers in order to reduce dependence on petroleum-based heating fuel oils as a source of combustion fuel. More specifically, the present disclosure is directed to systems, methods, and apparatuses utilizing a liquid thermally produced from biomass into commercial and industrial boiler or thermal systems such as boilers, furnaces, and kilns, and methods for generating renewable identification numbers (RINs), alternative energy credits (AECs) and renewable energy credits (RECs).
대표청구항▼
1. A dual-fuel method of heating, comprising: i) introducing a petroleum-based fuel into a dual-fuel burner followed by combusting said fuel, wherein the petroleum-based fuel is heating oil; andii) combusting an unenriched renewable fuel oil, comprising: a) introducing said renewal fuel oil into the
1. A dual-fuel method of heating, comprising: i) introducing a petroleum-based fuel into a dual-fuel burner followed by combusting said fuel, wherein the petroleum-based fuel is heating oil; andii) combusting an unenriched renewable fuel oil, comprising: a) introducing said renewal fuel oil into the dual-fuel burner at a ratio of 1.5:1 to 2:1, on a volume basis, relative to the introduced petroleum-based fuel;b) atomizing the unenriched renewable fuel oil in the dual-fuel burner to form a spray cone;c) aiming the spray cone proximate a radiant surface to at least partially vaporize the spray cone; andd) combusting the at least partially vaporized spray cone proximate a heat sink, said heat sink in thermal communication with the radiant surface. 2. The method of claim 1, wherein the unenriched renewable fuel oil is blended with ethanol. 3. The method of claim 1, further comprising: alternating between steps i and ii in response to estimated cumulative particulate emissions. 4. The method of claim 1, wherein the renewable fuel oil has an ash content of less than 0.07 wt. %. 5. The method of claim 1, wherein the renewable fuel oil contains at least 20 wt. % water. 6. The method of claim 1, wherein the unenriched renewable fuel oil is formed by non-catalytic rapid thermal processing of a cellulosic biomass. 7. The method of claim 1, wherein combustion steps i and ii are performed separately. 8. The method of claim 1, wherein the radiant surface and the heat sink together comprise a refractory sleeve. 9. The method of claim 8, wherein the refractory sleeve comprises a tube-shaped component having a length-to-diameter ratio in the range of 1.5:1-2.5:1. 10. The method of claim 8, wherein the refractory sleeve shields at least 25% of a flame generated during combustion of the at least partially vaporized spray cone. 11. The method of claim 1, further comprising: heating the unenriched renewable fuel oil from a temperature in the range of 10-40° C. to a temperature in the range of 50-70° C. for a period of no more than 20 seconds prior to introduction to the dual-fuel burner. 12. The method of claim 1, wherein a flow rate of a combustion air stream to the dual-fuel burner is adjusted to maintain a target flue gas oxygen concentration. 13. The method of claim 1, wherein feed rates of the petroleum-based fuel and the unenriched renewable fuel oil are adjusted to maintain a target pressure in a boiler. 14. The method of claim 1, further comprising: purging the dual-fuel burner of residual unenriched renewable fuel oil after the completion of step ii. 15. A dual-fuel method of heating, comprising: i) introducing a petroleum-based fuel into a dual-fuel burner followed by combusting said fuel; andii) combusting an unenriched renewable fuel oil, comprising: a) introducing said renewal fuel oil into the dual-fuel burner at a ratio of 1.5:1 to 2:1, on a volume basis, relative to the introduced petroleum-based fuel;b) atomizing the unenriched renewable fuel oil in the dual-fuel burner to form a spray cone;c) aiming the spray cone proximate a radiant surface to at least partially vaporize the spray cone; andd) combusting the at least partially vaporized spray cone proximate a heat sink, said heat sink in thermal communication with the radiant surface;iii) passing a combustion flue gas through fire tubes of a firetube boiler; andiv) providing at least one pulse of compressed gas per day to the fire tubes in the direction of flow of the combustion flue gas. 16. The method of claim 15, wherein the unenriched renewable fuel oil is blended with ethanol. 17. The method of claim 15, wherein the unenriched renewable fuel oil is formed by non-catalytic rapid thermal processing of a cellulosic biomass. 18. The method of claim 15, wherein combustion steps i and ii are performed separately. 19. The method of claim 15, wherein the radiant surface and the heat sink together comprise a refractory sleeve. 20. The method of claim 19, wherein the refractory sleeve comprises a tube-shaped component having a length-to-diameter ratio in the range of 1.5:1-2.5:1. 21. The method of claim 19, wherein the refractory sleeve shields at least 25% of a flame generated during combustion of the at least partially vaporized spray cone. 22. The method of claim 15, further comprising: heating the unenriched renewable fuel oil from a temperature in the range of 10-40° C. to a temperature in the range of 50-70° C. for a period of no more than 20 seconds prior to introduction to the dual-fuel burner. 23. The method of claim 15, wherein a flow rate of a combustion air stream to the dual-fuel burner is adjusted to maintain a target flue gas oxygen concentration. 24. The method of claim 15, wherein feed rates of the petroleum-based fuel and the unenriched renewable fuel oil are adjusted to maintain a target pressure in a boiler. 25. The method of claim 15, wherein the at least one pulse of compressed gas comprises up to eight pulses of air per day at a pressure of 100 psig.
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