MTO装置再生器旋风分离器操作优化模拟研究
SIMULATION ON OPERATION OPTIMIZATION OF CYCLONE SEPARATOR IN REGENERATOR OF MTO UNIT
彭威 1黄新俊 1詹庆丽 2刘胜昔 3马文杰 3黄立华1
作者信息
- 1. 中国石油大学(北京)克拉玛依校区,新疆克拉玛依 834000
- 2. 中国石油玉门油田分公司炼油化工总厂
- 3. 中国石油青海油田格尔木炼油厂
- 折叠
摘要
旋风分离器是甲醇制烯烃(MTO)装置常用的气固两相分离设备,其分离效率对装置的长周期稳定运行非常重要.某0.6 Mt/a MTO装置采用高活性催化剂后,再生器烧焦主风量低于设计值,导致一级旋风分离器入口气速低,20 μm以下细粉催化剂跑损量增大,催化剂消耗量增大.为此,采用计算颗粒流体力学(CPFD)软件模拟再生器四组二级旋风分离器的不同操作工况,调整旋风分离器入口面积与烟气流量改变入口气速,研究入口气速对旋风分离器压降和分离效率的影响规律.结果表明:烟气流量为42 241 m3/h时,封闭一组一级入口,旋风分离器入口气速提高3 m/s,旋风分离器总效率提高0.501百分点.依据模拟结果对旋风分离器提出了优化操作建议,可推广应用于其他MTO装置的操作调整.
Abstract
Cyclone separator is a common gas-solid two-phase separation equipment in methanol to olefins(MTO)unit,and its separation efficiency is very important for the long-term stable operation of the unit.Due to the use of a highly active catalyst in a 0.6 Mt/a MTO unit,the main air volume of the regenerator was lower than the design value,which resulted in low gas velocity at the inlet of the first-stage cyclone separator and increased loss of the fine powder catalyst under 20 μm in the unit,and catalyst consumption increased.For this purpose,the commercial computational particle fluid dynamics(CPFD)software was used to simulate the different operating conditions of the four group two-stage cyclones in the regenerator.The inlet gas velocity of the cyclone was changed by adjusting the inlet flow area and main air volume of the cyclone,and the effect of gas speed on the cyclone pressure drop and separation efficiency of the cyclone was studied.The results showed that when the main air volume was 42 241 m3/h,the gas velocity of cyclone separator could be increased by 3 m/s and the total efficiency of cyclone separator could be increased by 0.501 percentage points.Based on the simulation results,the optimal operation suggestions for cyclone separator were put forward,which could be applied to the operation adjustment of other MTO devices.
关键词
甲醇制烯烃/旋风分离器/再生器/入口气速/分离效率/数值模拟Key words
MTO/cyclone/regenerator/inlet gas velocity/separation efficiency/numerical simulation引用本文复制引用
基金项目
中国石油大学(北京)克拉玛依校区引进人才基金项目(XQZX20230020)
自治区天池英才青年博士项目(JXDF0264)
出版年
2024
NETL
NSTL
万方数据