Application of Computer Simulation in a Design Study of a New Concept of Pulverized Coal Gasification
Application of Computer Simulation in a Design Study of a New Concept of Pulverized Coal Gasification
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计算机仿真在粉煤气化新概念设计研究中的应用
DOI：
10.1080/00102209408935384
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
K. HANJALICć
中科院分区：
文献类型：
--
作者：
M. SIJERCčICć;K. HANJALICć
本文通过对粉煤直接气化过程的数学模拟研究，提出了粉煤直接气化的新概念。该方法假定煤粉气化发生在圆筒形反应器的环形区域，在反应器的外围区域是煤-氧化剂混合物的并流流动，在反应器的核心区域是热的燃烧产物作为热源。两相混合流，在反应器的核心中同时燃烧，在反应器的外围环形区域中同时煤气化，在两个并流流之间具有辐射热交换。气相在欧拉坐标系下描述，离散相在拉格朗日坐标系下描述，考虑了两相之间的相互传质和传热。气相输运方程的封闭性是通过应用修正的k-6湍流模型来实现的。
Abstract A new concept of direct gasification of pulverized coal in a stream reactor has been studied by mathematical simulation of the process. The new method presumes that gasification of pulverized coal will occur in the annular region of a cylindrical reactor during the co-current flow of coal-oxidant mixture in the peripheral zone and hot combustion products-serving as a heat soure-in the core region of the reactor.The paper presents a model of the process which was treated as a reactive, multi-component, two-phase mixture flow with simultaneous combustion in the core and coal gasification in the peripheral annular region ofthe reactor, with radiative heat exchange between the two co-current streams. The gas phase was described in the Eulerian frame and the discrete phase in the Lagrangian frame with the account of the mutual mass and heat transfer between the two phases. The closure of the transport equations for the gas phase was achieved by applying a version ofthe k-6turbulence model modified, to...