OCR Text |
Show . I· ne continuous Dimension and Condition: The upper part last heating zone of a slab reheaong mu o-zo furnace. The oxygen/COG combustion furnace is 10m -width, 8m-length, 1.2m-height. The air/COG combustion (conventional) furnace is 10m -width, 8m-length, 2.2m-height. 4 rows (total 8) burners, each caloric value is 3000Mcal/Hr., are settled. The flue gas outlet is 10m-width, 0.6m-height (under the division wall). The temperature of all slab surfaces is 1000°C CASE 1 CASE 2 CASE 3 CASE 4 oxygen/COG oxygen/COG oxygen/COG air/COG (1) without steamblowing without dispersion supply 1500/0 steam blowing without dispersion supply 1500/0 steam blowing 200/0 dispersion at 2m from walls 600C preheated combustion air • CASE 1 • CASE 2 o CASE 3 • CASE 4 ~ 1350 -+-----+--,.oC-h~___..:>..._~---+---,..L+-~~~___+_____l (1) 0.. ~1300~=4-----4-~-----~-----~~-----~-+-----~~ 1~~~~~~~~~~~~~~~~~~ o 2 3 4 5 6 7 8 9 10 distance from a side wall (m) Figure 15 Mean temperature distribution in furnace 220 210 :g 200 E 190 ] 180 6 170 >< ::3 160 !;: ~ 150 ~ ..c ih I·~ .,/ ~~ ) / ~Ir" I ~t:::::--............ ~>< ~ / "~ '-I / t---1 /' [7 ~{ ~ ~ ~~ / ~ ~ .. J t"'" ~~~ 140 130 o 1 2 3 4 5 6 7 8 9 10 distance from a side wall (m) Fioure 16 Mean heat flux distribution in furnace o - |