关键词: 甲醇精馏, 温度控制, 热焓控制, Aspen

Abstract: This paper introduces a design of the heat duty control strategy for methanol distillation column bottom.Based on the technical background of the processes and the analysis of the working conditions of the practical applications,taking into consideration that the dual heat exchanger is used as a reboiler in bottom of the distillation column,the heat duty control strategy is selected in the three-column methanol distillation control design.Simulations are given by using Aspen.In contrast to the regular temperature control scheme of methanol distillation,the method proposed in this paper has advantage of reducing the impurity content of the glycol ether.Moreover,the proposed methods can deal with the disturbance of flow rate and components variations.The quality of products could satisfy the industrial standard and requirement,which indicates that the proposed heat duty control scheme has definite significance and economic benefit in practice.

Key words: methanol distillation, temperature control, heat duty control, Aspen