Process Analysis and Simulation of Shell Pulverized Coal Gasifier

In this paper, the fluid flow characteristics of Shell pulverized coal gasifer was analysed based on flow pattern of multiopposedburner jet in confined vessel. The results show that there are five flow regions possessed different characteristics in the gasifier, which are jet flow region, impinging jet region, impinging jet developing stream region, recirculation stream region and tube stream region. The chemical reactions governing the process were analysed combined with fluid flow patterns. A Mathematic model has been presented for Shell gasifer. The industrial gasifier simulation have been made and the effects of operation conditions on gasification have been predicted using the model. The results show that there is a optimum yields of effective gases (CO+H2) along with the ratio of oxygen to coal. The optimum ratio of oxygen to coal is 0.54Nm3/kg～0.56Nm3/kg in different ratios of steam to coal. The yields of effective gases (CO+H2) increases along with the increasing of ratio of steam to coal.