Answer to Question #160416 in Physical Chemistry for deepak

Question

Following data are given for a blast furnace with and without oil injection. Items Without oil injection With oil injection Coke rate (kg/THM) 660 482 Oil Injection (kg/THM) 0 155 Blast temperature (oC) 1020 920 Blast quantity (Nm3 /THM) 1802 1297 Top gas temperature (oC) 235 235 Production (THM/hr.) 1.248 1.642 Calculate the replacement ratio.

Answer 1

Following data are given for a blast furnace with and without oil injection. Items Coke rate (kg/THM) Oil Injection (kg/THM) Blast temperature (°C) Blast quantity (Nm3/THM) Top gas temperature (°C) Production (THM/hr.) Without oil injection 660 0 1020 1802 235 1.248 With oil injection 482 155 920 1297 235 1.642 Calculate the replacement ratio. a. 0.95 kg coke/kg oil b. 1.27 kg coke/kg oil 1.03 kg coke/kg oil d. 1.15 kg coke/kg oil c.

In order to increase productivity, 40% more blast is injected in BF per unit time (base case at 2400 Nm?/m²/hr, average pressure at 1.8 atm and pressure drop of 1.4 atm). To restrict channelling, it is intended to maintain the pressure drop and hence linear velocity of gas through BF to be constant by enhancing top pressure. What will be the bottom pressure to achieve this? Assume, velocity exponent for pressure drop is at 1.75. a. b. 2.54 atm 3.04 atm 3.54 atm 3.94 atm c. d.