| 摘要 |
<p>A burner is described having a burner inlet for receiving a supply of combustible pulverous fuel and a supply of comburant gas and a burner outlet in the vicinity of which combustion of the fuel is supported during use; said burner comprising: a primary conduit defining a flow channel extending along a burner axis for conveying a mixture of fuel and gas such as comburant gas; a secondary conduit defining a flow channel disposed about the primary conduit for conveying gas such as comburant gas; wherein the primary conduit defines a flow channel extending to a primary conduit outlet within the burner substantially upstream of the burner outlet, whereby the secondary conduit downstream of the primary outlet defines a common conduit for flow from the primary and secondary conduits; a swirl generation device is provided to impart a swirl to the flow of gas from the secondary conduit upstream of the primary conduit outlet; and a venturi arrangement is provided in the vicinity of the primary outlet such as to act on the primary flow stream to impart a flow deviation outwardly away from axial to the mixture of fuel and gas from the primary conduit.</p> |
