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US 8,012,746 B2Granted
NOx removal system for biogas engines at anaerobic digestion facilities
AssigneeBiogas & Electric, LLC
InventorMichael Matelich
Life of this patent
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Abstract
Provided herein are methods, devices and systems comprising a reactor that is operatively connected to: (a) a biogas production unit for converting waste to a biogas stream; and (b) an engine that utilizes the biogas stream from the biogas producing unit to produce energy and an engine exhaust.
Claims19
A system comprising a reactor comprising a liquid waste stream inlet and an engine exhaust inlet, the reactor operatively connected to:
- (a) a biogas production unit constructed so as to convert waste to a biogas stream and a liquid waste stream and comprising a biogas stream outlet and a liquid waste stream outlet connected to the liquid waste stream inlet of the reactor;
- and
- (b) an internal combustion engine constructed so as to utilize the biogas stream to produce energy and an engine exhaust including NOx and comprising a biogas stream inlet connected to the biogas stream outlet of the biogas production unit and an engine exhaust outlet connected to the engine exhaust inlet of the reactor;
- wherein the reactor is constructed so as to generate a treated exhaust with decreased NOx emissions by contacting the engine exhaust with the liquid waste stream from the biogas production unit.
1 more element
A reactor comprising a liquid waste stream inlet and an engine exhaust inlet, the reactor operatively connected to:
- (a) a biogas production unit constructed so as to convert stream waste to a biogas stream and a liquid waste stream and comprising a biogas stream outlet and a liquid waste stream outlet connected to the liquid waste stream inlet of the reactor;
- and
- (b) an internal combustion engine constructed so as to utilize the biogas stream to produce energy and an engine exhaust including NOx and comprising a biogas stream inlet connected to the biogas stream out et of the biogas production unit and an engine exhaust outlet connected to the engine exhaust inlet of the reactor;
- wherein the reactor is constructed so as to generate a treated exhaust which contains an amount equal to or less than about 1 pound of NOx per MWh of energy produced by the engine by contacting the engine exhaust with the liquid waste stream from the biogas production unit.
1 more element
Dependencies are inferred from the claim text.