Introduction of Huaxin Environmental Business We build sustainable development world
Content Introduction of Huaxin Cement Ltd Environmental business in Huaxin Pre-processing platform for different waste MSW pre & co-processing 2013710 2
Huaxin Cement_100 years histroy 2013710 3
Cement business in China 9 provinces for cement business Tibet, Sichuan, Yunnan, Chongqing, Hubei, Hunan, Henan, Jiangsu, Guangdong 2013710 4
Business ranges from cement Aggregates & concrete Cement Equipment manufacture Environmental business Cement 2013710 5
5 main branches for Environmental business MSW SS CS FM HIW 2013710 6
Content Introduction of Huaxin Cement Ltd Environmental business in Huaxin Pre-processing platform for different waste MSW pre & co-processing 2013710 7
Pre & Co-processing for HIW At the end of 2007, cooperated with GIZ for OP Management Project in China Totally 150 tons of OP has been disposed in cement kiln By now, Huaxin has the permission from province EPB for HIW 25 categories, 9000 ton/a Pre-processing platform for Solid, liquid, sludge and packaged waste Flow chart for sludge HIW 2013710 8
Pre & Co-processing for FM Seasonally floating material does down along the Yangzi river during summer time Mainly is wood, tree, grass and plastics High water content about 60% Co-processing in cement kiln is the best solution Drying, cutting and sieving for pre-processing 2013710 9
Pre & Co-processing for CS 400,000 ton of CS need to be co-processed DDT & HCHs are the main pollutants Concentration verifies from tens of thousands to hundreds ppm High water content, big size with concrete and bricks Similar chemical components to silicon additives for clinker sintering Pre-processing needed for drying, grinding and detoxification Tertiary air from kiln has been used as heat sources Hot silicon material has been feed to pre-calciner Special internal design for homogenize the hot material in pre-calciner 2013710 10
Pre & Co-processing for SS DS ~15% from WWTP Feeding rate has been limited due to negative impact on kiln system from high water content Deeply dewater system need to be developed With this dewater system, DS can reach ~40% Both Transportation cost and negative impact on cement kiln can be reduced Drying system with kiln exhaust gas is on going M 2013710 11
Pre & Co-processing for MSW Based on the operation experiences for pre & coprocessing HIW in cement kiln Strongly request from local authority MSW pre-processing has been designed instand of directly burn the MSW neither in cement kiln nor in on-line incinerator attached to cement kiln With pre-processing, stable RDF and inert materials has been made from highly verified MSW RDF (. C) 2200 1200 (. C) 1500 900 1100S 68 13 1100min 30 15-100,000 2013710 12
Content Introduction of Huaxin Cement Ltd Environmental business in Huaxin Pre-processing platform for different waste MSW pre & co-processing 2013710 13
Pre-processing is indispensable for coprocessing MSW in cement kiln Characteristics of cement kiln operation Stable raw meal Stable fuel Stable operation parameters Stable kiln operation Good quality clinker Characteristics of MSW Huge fluctuation according to time and original area Negative impact on cement kiln operation is unavoidable if MSW directly burn either in kiln system or in an incinerator which integrated in cement kiln system Unstable kiln operation Heat consumption increasing Clinker production decreasing With co-processing Get stable RDF from fluctuant MSW Reduce negative impact on kiln operation Achieve fuel substitution 2013710 14
Huaxin MSW technical model MSW Collecting Local government Pre-processing plant can be duild up in cement plant or in a fixed distance Transport to MSW pre-processing plant Impact to kiln operation : Gas emission Clinker production Heat consumption Pre-processing plant: Reception Storage Pre-processing Re cycle MSW RDF Huaxin MSW pre-processing plant Huaxin cement plant for co-processing 2013710 15
MSW pre & co-processing pilot plant _ Wuxue Capacity 350t/dtotal investment 70 mil RMB 2013710 16
Flow chart 2013710 17
General view of Wuxue MSW Pre-processing plant 2013710 18
Main parts of the pre-processing system MSW reception Radio activities, weight Fermentation for drying Reduce water content from ~65% to 25%5% Mechanical sorting Drum screen, disk screen and gravity separator RDF, inert material and metals Bio filter system for odor from fermentation Waste water treatment system for leachate Back to municipal waste water treatment system Feeding system to cement kiln RDF feeding system Inert material feeding system 2013710 19
RDF and Inert material RDF 25% water content on average CV ~ 3000-3500 Kcal/Kg Inert material Chemical components similar to silicon additives Can be used as alternative material HM and Cl can meet the requirements for both National standards and Holcim-GIZ guideline 2013710 20
RDF feeding system 2013710 21
RDF using Feed to Pre calciner Coal consumption can be reduced with a fixed condition RDF CV ~3000Kcal/Kg Ø6.170m kiln, RDF feeding rate reach 8t/h Coal consumption can reduce about 2.1t/h Cl circulation has not been observed yet No impact on kiln operation No impact on clinker quality 2013710 22
Odor gas emission from bio filter 2013710 23
PCDD/F emission from kiln stack gas Emission Value ng I-TEQ/m3 CH EU HX1 HX2 HX3 2013710 24
PCDD/F emission from kiln stack gas 2013710 25
Further R&D for the system High efficiency fermentation technology Flexible Bio filter system Leachate treatment technology and mini Upgrading RDF feeding system for optimizing combustion Re-design for pre calciner for RDF and coal burn Theoretical research for low PCDD/F formation and emission from kiln 2013710 26