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Show 1 5 Table 8 Recent Application results of SCF burner Fuel Plate Nation Company Works & furnace Unit consumption of fuel (kcal/T) reducing area Kashima No. 3 3,900 Kashima No. 2 3,000 Japan Sumitomo Wakayama No. 5 3,900 lWakayama No. 4 4,000 Pohang No. 3 6,500 1P0hang FDL 7,000 ~outh Posco Korea tpohang No. 4 8,500 iPohang No. 1 8,500 Kaohsiung No. 2 9,700 Taiwan CSC Kaohsiung No. 1 9,700 Turkey TDCI Karabuk No. 2 11 ,000 Hungary Dunaferr punai No. 1, 2 14,000 China Wuhan ~uhan No. 3 8.,200 3.5 SLG burner This burner was developed for low calorie gas combustion. making sole use of blast furnace gas (650kcal/Nm3) possible. 3.S.1 Structure and principle of burner (Fig. 25) rate -53% -73% -48% -57% -64% -42% -41% -41% -52% -52% -86% -76% -75% { Fuer--·Air -- Air (m2) 600 500 122 260 400 40 400 130 280 ISO 60 50x2 82.5 Application date Mar. 1985 Mar. 1986 Dec. 1986 Dec. 1992 Jan. 1989 Sep. 1990 June 1991 Jan. 1993 Dec. 1990 Dec. 1992 July 1992 June 1992 Dec. 1989 Air Fuel gas strongly swirled by the burner center axle is ejected along the inside wall of the sub-combustion chamber. Combustion air is dispersed from multi-nozzles set up on the external circumference wall of sub-combustion chamber and ejected at right angles to fuel gas flow. Fig. 25 Structure and now pattern of SLG burner (1) A strong swirl is provided to the fuel and the intersection supply mixing of air. and uniform combustion is promoted. (2) Gradual mixing of air Inflammable combustion is stabilized by combustion progress in an overdensity state of fuel. (3) Rationalization of sub-combustion chamber length Combustion is stabilized and perfect combustion is attained by maintenance of a high temperature within the sub-combustion chamber. 3.5.2 Combustion characteristics An SLG burner with a combustion volume of 200 x 1~ kcal/h was installed in a 1.2m wide x 1.5m high x 2m long castable refractory furnace, and blast furnace gas was burned using room temperature air. (1) Stable short flames were formed within subcombustion chamber. (2) Stable combustion in an excess air ratio range of 1.05-2 is possible, and unburned CO is not generated. (3) Excellent flammability and combustion stability is obtained even when the furnace is cool. |