Abstract:

The renewable methanol is one of important ways in achieving sustainable development. The volatility and intermittency of renewable energy lead to frequent fluctuations in the operating conditions of the carbon dioxide hydrogenation to methanol process. To adapt to the fluctuations in renewable energy, it is necessary to enhance the flexibility of the methanol production system. In this work, a renewable methanol production system operating window regulation strategy for selecting appropriate equipment is proposed. The equipment database is established through the design and analysis of the operating window characteristics of key equipment under process conditions and operational constraints, and the operating window of the production system is expanded by optimizing the equipment set through the regulation strategy. The results indicated that the proposed method can effectively regulate the operating window of the methanol production system by maximizing the upper limit, minimizing the lower limit, and maximizing the range of operating window, and determine the optimal equipment combination and design scheme according to the application scenarios. These results are expected to provide guidance for flexibility improvement of methanol production system adapted to the fluctuations of renewable energy.

Key words: renewable energy, methanol production, operating window, equipment design, optimization

摘要：

可再生甲醇是实现可持续发展目标的重要途径之一。可再生能源的波动性和间歇性导致二氧化碳加氢制甲醇过程工况频繁波动。为了适应可再生能源的波动，甲醇生产系统的灵活性亟需提升。提出一种可再生甲醇生产系统操作窗口调控策略，通过在工艺条件和操作约束下设计分析关键设备的操作窗口特性建立设备数据库，并通过瓶颈设备识别与替换实现对生产系统中关键设备集的优化选择，有效调控和扩大生产系统的操作窗口。研究表明，所构建的甲醇生产系统操作窗口调控策略可以实现最大化生产系统操作上限、最小化生产系统操作下限和最大化操作窗口范围三个目标，以有效调控操作窗口，并依据给定的操作窗口需求确定最优的设备组合及设计方案，从而为适应可再生能源波动的甲醇生产系统柔性提升提供计算依据。

关键词: 可再生能源, 甲醇生产, 操作窗口, 设备设计, 优化