开发中的分离工艺主要采用吸收和精馏等化工单元操作过程得到纯度较高的二甲醚产品。本设计主要针对分离中的精馏工序进行工艺设计，分离二甲醚、甲醇和水三元体系。精馏塔采用浮阀塔，塔顶冷凝装置采用全凝器，用来准确控制回流比；塔底采用水蒸气蒸汽加热，以提供足够的热量。通过计算得出理论板数，塔效率，实际板数，进料位置，在板式塔主要工艺尺寸的设计计算中得出塔径，有效塔高，筛孔数。通过筛板的流体力学验算，证明各指标数据均符合标准。以保证精馏过程的顺利进行并使效率尽可能的提高。
关键词：二甲醚；分离；三元体系；精馏
Developed mainly in the separation process such as chemical absorption and distillation unit operation in the process of dimethyl ether with higher purity product. This design aimed at separating the distillation process for process design,separation of dimethyl ether， methanol and water ternary system. Design of distillation towers used valve. Use the whole top of the tower condenser cooling device used to accurately control the reflux ratio. Bottom of the column of steam heating by steam to provide sufficient heat. Obtained by calculating the number of theoretical plates,tower efficiency,the actual plate number,feed location. The main tower in the plate design and calculation of process dimensions derived column diameter, the effective tower,sieve number. Checking through the sieve of fluid mechanics， to prove that the indicator data are in line with standards to ensure the smooth progress of distillation process and to improve efficiency as much as possible.
Keywords: DME; Separate; Ternary system; Distillation
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