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Show Oxy-fuel combustion with preheated Oxygen- Natural gas (HeatOx) for small and medium size glass furnaces T. Kang1, H. Kim1, V. Sadasivuni1, K. Kaiser1, S. Liedel1, L. Jarry2, B. Leroux3, Y. Joumani4,, L. Kaya4 1 Air Liquide R&D, Newark, Delaware (US) , 2 Air Liquide Head Office, Paris, France 3 Air Liquide ALTEC, Paris, France , 4 Air Liquide R&D, les Loges-en-Josas, France, 5 SISECAM AFRC 2014 INDUSTRIAL COMBUSTION SYMPOSIUM Agenda Background HeatOx solution development for small/medium furnaces ALGLASS HeatOx technology components HeatOx burner tests results 2MW ALGLASS HeatOx NOx results Flame length Flame luminosity enhancement Burner pressure drop curves Summary Air Liquide, world leader in gases for industry, health and the environment 2 Background 8% 10% 12% 14% Fuel consumption gain vs cold reactants TO2 = 550°C TO2 = 650°C 0% 2% 4% 6% 0 100 200 300 400 500 600 Natural Gas Temperature (°C) ~10% NG and Oxygen saving thanks to NG (450°C) and O O2 (550°C) preheating. The saving was validated for a float glass tank as a first reference. More compact HeatOx solution has been developed for small/medium furnaces and will be implemented for a tableware glass tank under LIFE+ as a second Air Liquide, world leader in gases for industry, health and the environment reference. 3 Background (Cont.) Material study for preheated oxygen Cyclic oxidation / Promoted combustion study Long term exposure Promotion Ignition Chamber Macroscopic analysis Oxide scale Special attention has been paid to oxygen preheating hazards: Material selection Flange design and choice Air Liquide, world leader in gases for industry, health and the environment 4 HeatOx solution development for small/medium furnaces One heat exchanger for multiple burners CAPEX savings and smaller footprint Independent control of flowrate and temperature ALGLASS FC HeatOx burner Compact and operable with hot and cold reactants Constant flame length (~3m) with hot and cold reactants ALGLASS FC HeatOx burner 5 Air Liquide, world leader in gases for industry, health and the environment HeatOx solution development for small furnaces (Cont.) Pilot scale tests at DRTC Tested O2/NG heat exchangers with multiple independent inlets/outlets. 1MW and 2MW HeatOx burners were tested with cold and hot reactants. Temperature control schemes were validated. 6 Air Liquide, world leader in gases for industry, health and the environment Industrial demonstration under LIFE+ (start-up in 2015) HeatOx solution development for small furnaces (Cont.) One O2/NG heat exchanger for four burners (total 8 burners). Heat recovery process optimized by Air Liquide www.ecoheatox.com 7 Air Liquide, world leader in gases for industry, health and the environment ALGLASS HeatOx Technology Components Global Offer Part 1 Oxygen Part 2 Burners Part 3 Valve train Part 4 Thermal heat exchangers Part 5 Engineering, installation and integration ~550C One heat exchanger (O2/NG) can accommodate multiple burners (Patent pending, WO 2014/052627 and WO 2014/052635). Flowrate and temperature can be controlled individually. ALGLASS FC HeatOx burner can be operable with cold and hot reactants without operator's manipulation (Patent pending). Air Liquide, world leader in gases for industry, health and the environment Built-in safety and control logic. 8 2MW ALGLASS HeatOx burner NOx results 250 2MW Burner -- NOx 200 200ppm 100 150 NOx (ppm) 50 HOT Conditions COLD conditions FC Burner Oxygen ALGLASS FC ALGLASS FC HeatOx in cold fluid operations ALGLASS FC HeatOx in hot fluid operations 0 0 0.5 1 1.5 2 2.5 3 3.5 Power (MW) NG Air Liquide, world leader in gases for industry, health 9 and the environment Flame length Flame length was about 2.7-3m irrespective of operating temperature of reactants. Air Liquide, world leader in gases for industry, health 10 and the environment Flame luminosity enhancement 2.5MW cold O2 and NG 2.5MW hot O2 and NG Air Liquide, world leader in gases for industry, health 11 and the environment Burner Pressure Drop Curves ALGLASS FC HeatOx 1MW in cold fluid operations ALGLASS FC HeatOx 1MW ALGLASS FC HeatOx 2MW in hot fluid operations ALGLASS FC HeatOx 2MW in cold fluid operations in hot fluid operations Air Liquide, world leader in gases for industry, health 12 and the environment Summary Pilot scale HeatOx system was demonstrated at DRTC. O2/NG temperature (400°C - 600°C) Multiple burners can be simultaneously operated with independent power control. ALGLASS FC HeatOx burner Compact and operable with hot and cold reactants Constant flame length (~3m) with hot and cold reactants. NOx level under 200ppm at any given power. Flame luminosity enhancement. Pressure drop fluctuation is minimal during the transition from cold to hot operation. 13 Air Liquide, world leader in gases for industry, health and the environment |
