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On April 27, 2019, the world's first dual-fluidized bed ultra-large (5000 t/d) pulverized coal gasification (KSY) technology industrial test device (100 t/d) passed the 72-hour on-site assessment and calibration by the Expert Committee of the Shaanxi Chemical Industry Society in a very stable and fully automated state without manual intervention. The calibration results show that the device load, gas production rate, effective gas (CO+H2), gas calorific value, cold gas efficiency and carbon conversion rate all meet or exceed the design indicators. This important innovation in coal gasification technology marks a major breakthrough in my country's ultra-large coal gasification technology. KSY technology is a dual fluidized bed pulverized coal gasification technology that adopts dry feeding, dry ash discharge, and efficient coupling of two-stage reactors. This technology has the advantages and characteristics of large single-set processing capacity, wide adaptability to coal types, low project investment, low consumption and environmental protection. The scale of the industrial test device calibrated this time is 100 t/d. The device started construction in 2013 and completed its first feeding test in 2016. It has carried out 9 tests so far, burned multiple coal types in the northern Shaanxi and Binchang mining areas, and obtained a large amount of detailed test data. Through experimental research, the fluidization theory of the double-circulation fluidization field was established, and core technologies and equipment such as a proprietary fluidized bed pulverized coal feeding system, an efficient and accurate gasification agent regulation and temperature control system, and a continuous pressure reduction ash discharge device were developed, thus forming a complete set of highly innovative pulverized coal gasification process technologies.
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KSY technology is a dual fluidized bed pulverized coal gasification technology that adopts dry feeding, dry ash discharge, and efficient coupling of two-stage reactors. This technology has the advantages and characteristics of large single-set processing capacity, wide adaptability to coal types, low project investment, low consumption and environmental protection.