Nippon Steel Corp. · TSE:5401
Nippon Steel — Nippon Steel & Sumikin Engineering — Technical Presentation (2017)
14 slides from Nippon Steel's technical presentation, 2017
Slide 1: Fluidized Bed type CMC utilizing Coke Oven Exhaust Gas
Fluidized Bed type CMC utilizing Coke Oven Exhaust Gas CMC (Coal Moisture Control) Nippon Steel & Sumikin Engineering Co.,Ltd. Copyright©2017 NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD. All Rights Reserved.
Slide 2: Content
Content 1.Introduce of CMC Outline and Process flow and Merits 2.CMC’s Drying Method Comparison of Drying Method 3.Fluidized Bed type CMC Nippon Steel & Sumikin Engineering’s FB type CMC and Chinese One 4.Experiment for Comparing two FB type CMC Drying Efficiency and Fluidized Bed Condition 5. Concl
Slide 3: Outline of CMC
Outline of CMC Coal Blending Bin Coke Oven Wet Coal Dry Coal Approx. 10% Moisture CMC Approx. 6-7% Moisture (Coal Moisture Control) Drying Wet Coal and Reducing Coal Moisture Copyright©2017 NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD. All Rights Reserved.
Slide 4: CMC Process Flow
CMC Process Flow Heat Bag Filter Coke Oven Wet Coal Approx.10% Coal Blending Machine Dryer Dry Coal Approx. 6-7% Copyright©2017 NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD. All Rights Reserved.
Slide 5: Global circumstances and Role of CMC
Global circumstances and Role of CMC Needs ・Prevention of Global ・Energy Saving Warming ・Expanding Demand for ・ Coke Production Iron ( in Asia ) Increase ・Expanding Demand for ・ Increase the Amount Coal( in Asia ) of Low-Quality Coal Usage CMC can meet those needs. Copyright©2017 NIPPON STEEL & SUMI
Slide 6: Merits of CMC
Merits of CMC Reference: Merit of Coke Oven Waste Heat-recovery type CMC (Actual case of coke ovens in Japan when the moisture content is reduced by 4%) Energy Saving of Coke Oven （Approx. 340MJ/t-coal） Coke Quality Improvement 150 (DI15 : Approx.1.7%) Coke Production Increase (Approx.11%) Fifth Int
Slide 7: Comparison of Drying Method
Comparison of Drying Method Nippon Steel & Sumikin Engineering STD (Steam Tube Dryer) CIT (Coal in Tube) FB (Fluidized Bed) Air (Exhaust) Exhaust gas Wet coal Wet coal Air (Exhaust) + Fine Coal Steam Steam Air Wet coal Coke Oven Exhaust Gas Dried coal ＜Cross section＞ ＜Cross section＞ Dried coal Coal
Slide 8: Comparison of Drying Method
Comparison of Drying Method Type STD CIT FB ・Multi-Tube ・Multi-Tube ・Steam Inside ・Coal Inside ・Fluidized Bed Drying method ・Indirect Heat ・Indirect Heat ・Direct Heat Transfer Transfer Transfer ・Coke Oven Exhaust Heat resource ・Steam ・Steam Gas lowest cost ・Need External Heat ・Need External Heat Ene
Slide 9: Nippon Steel & Sumikin Engineering's FB type CMC Process Flow
Nippon Steel & Sumikin Engineering’s FB type CMC Process Flow £ coal Dry Y ¼ Wet Y Coal No.2 No.2Blower Ì ÞÛÜ° Approx.10% Hopper Heat resource Î ¯Êß° Ë Stack(new) for drying coal WBug o @ Filter @( VÝ ) is unnecessary Fluidized ¬ Bed® w £ Dryer @ Coal Blending coal Mach
Slide 10: 2 Kinds of FB type CMC
2 Kinds of FB type CMC ・Nippon Steel & Sumikin Engineereing’s FB … Drying coking coal after pulverization. Fluidized Bed Dryer Pulverizer Coal Coal Coal ・Chinese FB … Drying coking coal before pulverization. Fluidized Bed Dryer Pulverizer Coal Coal Coal Differences (Depending on Grain size) → ・dryin
Slide 11: Drying Efficiency
Drying Efficiency Drying Efficiency = (①Evaporative Latent Heat) / (②Heat Value Required for Drying) 90 80 Drying efficiency (%) 70 60 50 40 0 1 2 3 4 5 6 7 Average grain size (mm) Small Grain Size High Drying Efficiency Nippon Steel & Sumikin Engineering’s FB is Suitable for CMC ! Copyright©2017 NI
Slide 12: Fluidized Bed Condition
Fluidized Bed Condition Different Type 120 Large Particle 110 Fluidized bed temperature (℃) 1.3mm Low Temp. 100 5.34mm 90 8.88mm Coal High Temp. 80 13.24mm 70 60 50 NSEC 40 Small Particle 30 Uniform 20 Temp. 10 Coal 0 0 5 10 15 20 25 30 35 40 45 50 55 60 Time (sec) Small Grain Size Few Partial Overh
Slide 13: Conclusion
Conclusion ・CMC have three merits. 1.Energy Saving of Coke Oven（Approx. 340MJ/t-coal） 2.Coke Quality Improvement(DI150 15 : Approx.1.7%) 3.Coke Production Increase(Approx.11%) ・ Energy and maintenance cost is the lowest by drying Nippon Steel & Sumikin Engineering’s FB type CMC to compare to STD and
Slide 14: Thank you!
Thank you! Nippon Steel & Sumikin Engineering Co.Ltd. Copyright©2017 NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD. All Rights Reserved. C Nippon Steel & Sumikin Engineering 2011, All Right Reserved.
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