固定流化床反应器内气体分布方式的优化

发布时间：2018-06-22 20:08

本文选题：流化床 + 气体分布　；参考：《化学工程》2017年03期

【摘要】：传统小型固定流化床反应器采用烧结板作为气体分布装置,利用中控螺栓将分布器压紧固定在流化床反应器底部。在较高的操作温度条件下,由于密封垫与反应器材质的不同而产生不同程度的膨胀,导致密封部分或者环隙出现气流短路的问题,造成流化状态的不稳定,导致部分催化剂未参与实际反应,影响了催化剂评价数据结果的准确性。为了解决这一难题,文中采用堆砌的不锈钢珠作为分散介质,利用规则不锈钢珠气阻小、易于安装和拆卸的特点,降低了密封要求。文中通过流化床冷模实验比较了烧结板气体分布器和规则填料气体分布器的阻力大小和流化状态,通过流化床热模比较了烧结板气体分布器和规则填料气体分布器的温度分布。实验表明本文的方法大大改善了流化床流化状态,获得了良好的固定流化床评价结果。
[Abstract]:In the traditional fixed fluidized bed reactor, sintering plate is used as the gas distributing device, and the distributor is pressed tightly to the bottom of the fluidized bed reactor by using the middle control bolt. At higher operating temperature, the gasket expands to different degrees due to the difference between the material of the gasket and the reactor, which leads to the problem of short circuit of the airflow in the sealing part or ring gap, which results in the instability of the fluidization state. As a result, some of the catalysts did not participate in the actual reaction, which affected the accuracy of the results of the catalyst evaluation. In order to solve this problem, the stainless steel beads are used as dispersing medium in this paper, and the sealing requirements are reduced by using the characteristics of regular stainless steel beads with small gas resistance and easy installation and disassembly. In this paper, the resistance and fluidization state of sintered plate gas distributor and regular packing gas distributor are compared by fluidized bed cold model experiment, and the temperature distribution of sintered plate gas distributor and regular packing gas distributor are compared by fluidized bed thermal model. The experimental results show that the fluidization state of fluidized bed is greatly improved by this method, and the evaluation results of fixed fluidized bed are satisfactory.
【作者单位】：北京旭阳化工技术研究院有限公司;
【分类号】：TQ021.1

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