甲醇制烯烃(MTO)装置催化剂循环回路的下行流动部分是再生立管,操作复杂性在于立管内催化剂的流态受多种因素影响。某0.60 Mt/a MTO装置投产运行7年,期间一直存在再生立管催化剂输送下料不畅的问题,反再两器运行参数波动幅度宽,工艺工况复杂多变,无法实现100%自控率,操作人员劳动强度大,产品收率降低,能耗、剂耗增加。根据现有调节措施和临时故障处理方法,只能通过调整再生立管松动风来维持短暂立管正常下料。从再生立管上下串联设备影响、再生立管整体设计、介质流化状态、工艺操作等方面出发,对再生立管生产运行瓶颈产生的原因进行分析,确定影响再生立管高效运行的症结所在。根据问题的剖析提出改进建议,为再生立管后续升级改造提供合理的理论支持和指导判断。

The regeneration riser is the downstream part of the catalyst circulation loop of methanol to olefin plant (MTO),and the complexity of its operation lies in the fact that the flow pattern of the catalyst in the riser is affected by many factors.A 600,000 t/a MTO plant has been put into operation for seven years,and there has always existed the problem of poor transportation and feeding of regeneration riser catalyst.The operating parameters of the reactor and regenerator fluctuate widely,and the process conditions are complex and changeable,so it is impossible to achieve 100% automatic control rate.The operators work hard,the product yield remains low,and the energy consumption and agent consumption are increased.According to the existing adjustment measures and temporary fault handling methods,only by adjusting the loose wind of the regeneration riser can the normal baiting of the riser be maintained for a short time.This paper analyzes the causes of the bottleneck in the production and operation of the regeneration riser from the aspects such as the influence of the upper and lower series equipment,the overall design of the regeneration riser,the fluidization state of the medium and the process operation.Hence the crux of the problem affecting the efficient operation of the regeneration riser is found and determined.According to the problem analysis and improvement suggestion,it provides reasonable theoretical support and guidance for the subsequent upgrading and reconstruction of the regeneration riser.

赵亚伟(1989-),男,本科,工程师,主要从事甲醇制烯烃技术领域设备管理,通讯联系人,1304174119@qq.com。