Numerical Simulation of Hydrogen-Enriched Natural Gas Combustion in Small-Scale Glass Furnace and Its Impact on Furnace Performance
Energy-saving and carbon reduction is an important energy strategy in my country,and natural gas mixed with hydrogen is one of the principle measures to reduce carbon emissions.This article used the optical glass melting furnace flame space as the research object,it used natural gas mixed with hydrogen as fuel to simulate the combustion characteristics of different natural gas mixed with hydrogen conditions,and it impacted on the melting process.In the case of not changing the existing gas supply pipeline structure and the unchanged total gas supply flow,research showed that in terms of combustion characteristics,as the hydrogen content in natural gas increases from zero to 25％,the flame length was reduced,and the flame coverage surface decreased,the flame peak temperature increased,and the OH-concentration in flames was increased.Therefore,natural gas hydrogenation put forward new requirements for the structure of the molten furnace and refractory materials,especially the high heat and alkali resistance of the burner and the stove wall.In terms of furnace characteristics,as the amount of hydrogen added increases,the furnace temperature and the heat absorption of the glass surface first increased and then decreased.The furnace temperature was highest under the condition of 20％hydrogen added,which was 20 ℃ higher than that without hydrogen added;The volume concentration of CO2 emissions decreased with the increase of hydrogen blending ratio,and the hydrogen blending amount was reduced by 7.5％compared to the no hydrogen mixing condition at 25％.
combustion of natural gas mixed with hydrogenglass melting furnacecombustion characteristicsmelting furnace characteristicsenergy saving and carbon reduction
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