Thermal evaluation and analysis of vertical furnace for lignite activated coke production

Lignite activated coke had abundant pores and strong adsorption ability. The production cost could be reduced when the coke produced by vertical furnace,which decreased the intermediate transfer links and improved the thermal efficiency. The main structure of GF vertical furnace,carbonization and activation processes were described. Depending on operating data and experiment results,the material balance and heat balance were calculated,and the properties of products including coal gas and activated coke were analyzed. The results showed that,using raw coal as benchmark,the activated coke yield was 27%,accounting for 14. 95% of the total materials expenditure.Heat consumption for water evaporation accounted 60. 22% of the total calories expenditure,and the dry segment was the largest heat load.The coke cooling method with flue gas could recover the heat from the bottom of activation section,which used for pre- drying of raw coal.The system thermal efficiency was 84. 2%. GF vertical furnace had the features of temperature distribution uniformly of gas and materials,internal structure set reasonable and operational stability. Combined with market demand and adjusted production operating parameters,the application range of product broadened and the economic value increased.