求翻译：本设计对苯—甲苯分离过程筛板精馏塔装置进行了设计，主要进行了以下工作：1、对主要生产工艺流程和方案进行了选择和确定。2、对生产的主要设备—筛板塔进行了工艺计算设计,其中包括：①精馏塔的物料衡算；②塔板数的确定；③精馏塔的工艺条件及有关物性数据的计算；④精馏塔的塔体工艺尺寸计算；⑤精馏塔塔板的主要工艺尺寸的计算。3、绘制了生产工艺流程图和精馏塔设计条件图。4、对设计过程中的有关问题进行了讨论和评述。本设计简明、合理，能满足初步生产工艺的需要，有一定的实践指导作用。是什么意思？

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The design of the benzene-toluene sieve plate separation process for refining the unit has been designed primarily for the following: 1, on the main production processes and programs are selected and identified. 2, to the production of the main device - the sieve process Computing Design, including:

This separation process designed on benzene-toluene sieve plate distillation column design the device, mainly for the following work: 1, the major production processes and selecting and defining the programme. 2, the main equipment of the production-process calculation of designed sieve-plate column