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Air blown partial gasification of coal in a pilot plant pressurized spout-fluid bed reactor

机译：在中试厂加压喷流床反应器中对煤进行鼓风部分气化

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摘要

The advanced high efficiency cycles are all based on gas turbine technology, so coal gasification is the heart of the process. A 2 MW_(th) spout-fluid bed gasifier has been constructed to study the partial gasification performance of a high ash Chinese coal. This paper presents the results of pilot plant partial gasification tests carried out at 0.5 MPa pressure and temperatures within the range of 950-980℃ in order to assess the technical feasibility of the raw gas and residual char generated from the gasifiier for use in the gas turbine based power plant. The results indicate that the gasification process at a higher temperature is better as far as carbon conversion, gas yield and cold gas efficiency are concerned. Increasing steam to coal ratio from 0.32 to 0.45 favors the water-gas and water-gas shift reactions that causes hydrogen content in the raw gas to rise. Coal gasification at a higher bed height shows advantages in gas quality, carbon conversion, gas yield and cold gas efficiency. The gas heating value data obtained from the deep-bed-height displays only 6-12% lower than the calculated value on the basis of Gibbs free energy minimization. The char residue shows high combustion reactivity and more than 99% combustion efficiency can be achieved.
机译：先进的高效循环均基于燃气轮机技术，因此煤气化是该过程的核心。为了研究高灰分中国煤的部分气化性能，已经建造了一个2兆瓦（th）的喷口流化床气化炉。本文介绍了在0.5 MPa的压力和950-980℃的温度下进行的工厂部分气化试验的结果，目的是评估气化炉产生的原料气和残余焦炭用于该气体的技术可行性。涡轮发电厂。结果表明，就碳转化率，气体产率和冷气效率而言，高温下的气化过程更好。将水蒸气与煤的比率从0.32增加到0.45有利于水煤气和水煤气变换反应，从而导致原料气中的氢含量上升。在较高床层高度的煤气化在气体质量，碳转化率，气体产率和冷气效率方面显示出优势。根据吉布斯自由能最小化，从深床高度获得的气体热值数据仅比计算值低6-12％。焦炭残留物显示出高燃烧反应活性，可实现超过99％的燃烧效率。

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