Is changing from a fixed-bed to a fluidized-bed system energy-saving? How much can be saved through energy conservation?
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There are thousands of fixed-bed gasifiers in operation across the country, many of which face problems such as high raw material costs and severe pollution. If it is changed to gas-flow bed gasification, can energy conservation and emission reduction be achieved? Where should one start when conducting a comparative calculation of the energy consumption for these two gasification methods?
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There is no doubt that the fluidized bed is more advanced than the fixed bed; its carbon conversion rate is about 15% higher than that of the fixed bed. The key issue is the range of coal types that can be used – if an appropriate coal type cannot be found, there will still be problems with the modification process； At present, small and medium-sized nitrogen fertilizer plants in China have high energy consumption, cause significant environmental pollution, and generally exhibit poor economic performance (with the exception of Shanxi, which has coal resources); how to transform them is a long-term challenge