The IP.com Journal (v7n10A)
Juergen Carstens - Contact
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SIEMENS AG 2007
English (United States)
1 pages / 91.8 KB
Gas Turbine Burner for Syngas/Coke Oven Gas - Modifications to Reduce Flashback Potential
Idea: Benjamin Hinson, GB-Lincoln
A flashback in a gas turbine burner occurs when the laminar or 'burning' velocity of a flame exceeds the velocity resulting from flow characteristics of the reactants, and the flame moves downstream towards the injector tip. This is undesirable since the injector material is not capable of withstanding the high temperatures resulting from the flame.
The novel modified burner reduces both pressure delivery requirements, and the potential of flashback (see Fig. 1). In addition, the burner has thermocouples attached to the injector tip, to help warn of potential flashback. The modified burner has an increased flow area to accommodate the increased flow of lower calorific value gas fuel, reducing delivery pressure requirements. In addition, the reduced injection velocity results in reduced suction in the region of the injector tip (due to a reduction in the dynamic head pressure loss), and less air is entrained into the region. As a result, fuel air mixtures remain rich of stoichiometric, and flash back potential is reduced.
Fig. 1: Modifications in a gas turbine burner to reduce flashback potential
Injection hole diameter Increased to
© SIEMENS AG 2007 file: 2007J19320.rtf page: 1