Method for combustion of a low-grade fuel

摘要

Method for combustion of a fuel uses an existing air burner (1), including a first supply opening (5) for fuel and a second supply opening (7) for air, which supply openings (5,7) open out into a combustion zone (3). The method is characterised in that a gaseous fuel with an LHV (Lower Heating Value) of less than 7.5 MJ/Nm3 is supplied through the second supply opening (7), in that an oxidant including at least 85 percent by weight oxygen is also supplied to the combustion zone (3) through a supply device for oxidant, and in that the gaseous fuel is caused to be combusted with the oxidant in the combustion zone (3).

主权项

1. A method for combustion of a fuel, the method comprising the steps of:
using an existing air burner (1), which air burner (1) comprises a first supply opening (5) for fuel and a second supply opening (7) for air, which first and second supply openings (5,7) open out into a combustion zone (3), supplying a gaseous low-grade fuel with a lower heating value (LHV) of less than 7.5 MJ/Nm3 through the second supply opening (7) for air, supplying an oxidant comprising at least 85 percent by weight oxygen to the combustion zone (3) through a supply device for oxidant, and causing the gaseous low-grade fuel to be combusted with the oxidant in the combustion zone (3), wherein the supply device for oxidant is caused to comprise a lance adapted for supply of oxidant.