THE YEAR-BOOK OF THE COKE OVEN - Coke-oven-managers.org

More documents

Recommendations

Info

Oven height Number of batteries Number of ovens Oven width Useable volume p. oven Numb. of pushes/charges p. day Total length of sealings (doors, standpipes, charging holes) Required space for the batteries Sets of oven machines 2 3 5 Operation teams 1 2 3 Typical number of pushes per oven during its lifetime : World average / Maximum 12,000 15,000 Oven width : 450 mm Coking time : 20 hr Pushes per oven : per day : 1.2 per year : 438 7.6 m 6.0 m 4.3 m 2 4 5 140 220 325 590 mm 450 mm 450 mm 76 m³ 34 m³ 20 m³ 135 300 520 4.8 km 6.0 km 6.5 km 40,000 m 2 Oven width : 590 mm Coking time : 27 hr Pushes per oven : per day : 0.9 per year : 324 Lifetime per oven ( average / maximum ) 27 / 34 years 37 / 46 years 6 50,000 m 2 Table 1 Comparison for 2 million mt of Coke Per Year 55,000 m 2 The extended lifetime of a battery with high-capacity ovens in comparison to a common design is illustrated in figure 5. A typical number of operation cycles per oven within the lifetime of a battery is 12,000 on average with maximum figures of approx. 15,000. Common ovens having a typical chamber width of 450mm and a coking time of 20h are pushed 1.2 times a day with 438 pushes per year. High capacity ovens with a chamber width of 590mm have 0.9 pushes per day and 324 pushes per year. This leads to a total lifetime of 27/34 years of the common batteries in comparison to 37/46 years for the high capacity units. Figure 5 Different lifetimes of batteries
Environmental issues The comparison in table 1 indicates a general better environmental situation with the application of high-capacity ovens, generated by less pushing and charging per day as well as by a reduced total length of sealing elements at the oven closures, followed by less visible emissions. A further and high efficient improvement of this emission behavior can be achieved by applying the PROven ® - system, which represents a pressure control system for each individual oven of a coke oven battery. Its general function is illustrated in figure 6. The variable gas pressure Coking Chamber variable pressure during coking to be controlled by PROven PC variable flow resistance constant and low pressure in the coking chamber with PROven 7 Collecting Main approx. -25 mm w.c. Figure 6 General Function of the PROven ® - System, a Pressure Control for Each Individual Oven inside the oven chamber is compensated by a variable and controlled flow resistance, installed in the standpipe of each oven 5 . The collecting main pressure is kept under a constant suction (typical -25 mm W.C.). By applying additional fine tunings of the set points for the pressure control the gas pressure inside the oven is kept on a low and constant positive level. This results in low fugitive emissions at the doors and all other oven closures and prevents air ingress at the doors into the ovens, avoiding damage of the refractory material by overheating charging emissions, too, are reduced drastically, since the full suction in the collecting mains can be used for transferring the charging gases to the raw gas system.
Page 1 and 2: Introduction Application of New Cok
Page 3 and 4: 600 500 400 300 200 100 0 1600 1400
Page 5: The advantages of such big chamber
Page 9 and 10: Contracts for the PROven ® - Syste
Page 11 and 12: Four coke oven batteries 240 ovens
Page 13: References 1. Private communication

THE YEAR-BOOK OF THE COKE OVEN - Coke-oven-managers.org

Create successful ePaper yourself

Delete template?

Save as template?