求翻译：本技术拟采用精馏方法处理该废水，整个工艺过程运行的关键是能耗，为此，本项目在工艺开发过程中，采用系统工程的热集成技术思想，以过程运行的经济性为目标，废水处理后排水COD指标为约束条件，合理规划热量使用，寻找最优的用能方案，以期获得较大的节能效果，使过程运行处于最低的能耗状态。是什么意思？

This technology intends used fine distillation method processing the wastewater, entire technology process run of key is energy consumption, for this, this project in technology development process in the, used systems engineering of hot integrated technology thought, to process run of economic sexual for target, wastewater processing rear water COD indicators for constraint conditions, reasonable planning heat using, looking for optimal of with can programme, to get larger of energy saving effect, makes process run is minimum of energy consumption State.