SYSTEM AND METHOD FOR BLENDING BIOGAS

摘要

A method and system for blending biogas with conventional fuel in which the fuel blend is automatically adjusted for lower biogas flows and methane concentrations by introducing higher concentrations of conventional fuels. The system is able to automatically adjust the fuel blend, thereby eliminating the requirement for manual intervention, and producing a variable blended biogas that can be utilized within existing natural-gas fired combustion units such as boilers, furnaces, heaters, etc., as well as enabling automatic adjustment and operation, maximum usage of biogas, and integration with combustion unit controls. Using all available biogas to provide energy also minimizes the need for flaring unused biogas.

主权项

1. A fuel blender for a combustion unit, comprising:
a first inlet for receiving biogas; a second inlet for receiving fuel gas; a chamber for receiving and mixing the biogas and the fuel gas; a fuel control valve at each inlet for adjusting the relative amounts of the biogas and fuel gas entering the fuel chamber; an outlet extending from the fuel chamber wherein the mixed fuels exit the fuel blender for providing fuel to a remote combustion unit.