| 摘要 |
A mixing method insures adequate mixing of gases in a glass furnace that employs a reburning process. Because of the mixing method, a novel glass furnace can be constructed that strikes an optimum balance between a reduction in nitrogen oxide (NOx) emissions and the cost of the reburn process, particularly, the number of requisite reburn and overfire air jets as well as reburn fuel. The glass furnace is constructed as follows. A combustion housing defines a primary zone for receiving combustible fuel, a reburn zone connected to the primary zone for receiving exhaust from the primary zone and reburn fuel to generate a first gas mixture. A burnout zone is connected to the reburn zone and receives the first gas mixture and overfire air to generate a second gas mixture. In accordance with the mixing method, one or more reburn jets provide reburn fuel to the reburn zone so that the fuel stoichiometric ratio observed at multiple locations in a first measurement plane of the first gas mixture residing substantially at an exit to the reburn zone is characterized by a first coefficient of variation (COV) that is about 0.4, and further, one or more overfire air jets provides air to the overburn zone so that a second measurement plane of the second gas mixture residing substantially at an exit of the burnout zone is characterized by a second coefficient of variation that is 0.4.
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