可再生甲醇生产系统操作窗口特性分析与调控

doi:10.11949/0438-1157.20240553

摘要/Abstract

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。本文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：本文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以及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

Abstract:

The renewable methanol is one of important ways in achieving sustainable development. However, the fluctuating and intermittent renewable energy may lead to frequent process conditions fluctuations of the hydrogenation of carbon dioxide to methanol. 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

中图分类号:

TQ 021.8

孔昕山, 高鑫, 康丽霞, 刘永忠. 可再生甲醇生产系统操作窗口特性分析与调控[J]. 化工学报, DOI: 10.11949/0438-1157.20240553.

Xinshan KONG, Xin Gao, Lixia KANG, Yongzhong LIU. Analysis and regulation on operating window of renewable methanol production system[J]. CIESC Journal, DOI: 10.11949/0438-1157.20240553.

图/表 24

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设备单元	约束条件
反应器	反应选择性、反应转化率、反应温度范围、压降
精馏塔	降液管液泛、雾沫夹带液泛、液相负荷上下限、漏液
换热器	换热面积余量、管程和壳程流速、管程和壳程压降、进出口ρv²

设备单元	约束条件
反应器	反应选择性、反应转化率、反应温度范围、压降
精馏塔	降液管液泛、雾沫夹带液泛、液相负荷上下限、漏液
换热器	换热面积余量、管程和壳程流速、管程和壳程压降、进出口ρv²

工艺参数	数值
进料摩尔比	CO₂/H₂=1/3
进料流量	H₂=0.22 t/h
产量和产品规格	7600 ton/a 98.5 wt%甲醇
循环摩尔比	4.8
单程转化率	29.01%
选择性	99%
吹扫排空气体	1%

工艺参数	数值
进料摩尔比	CO₂/H₂=1/3
进料流量	H₂=0.22 t/h
产量和产品规格	7600 ton/a 98.5 wt%甲醇
循环摩尔比	4.8
单程转化率	29.01%
选择性	99%
吹扫排空气体	1%

约束条件	操作下限	操作上限
转化率	28.5%	—
选择性	98.5%	—
压降(bar)	0.1	0.4