草甘膦生产工艺水资源代谢分析与优化建议

Metabolism Analysis and Optimization Suggestions of the Water System in the Manufacturing Process of Glyphosate

以某农药集团草甘膦生产工艺为例,运用工业代谢分析方法对其水资源代谢过程进行量化分析,建立了水代谢平衡账户并绘制了水代谢图,在此基础上,识别和筛选出草甘膦生产过程中的主要用水单元及废水排放单元,并据此提出优化建议.结果表明,草甘膦生产过程中的主要用水类别为蒸汽,其蒸汽消耗单元多且用汽量大,而换热网络单一,冷凝水浪费较严重,系统中水资源重复利用水平较差.针对该问题,从系统优化和节水管理等方面提出了工艺废水的重复利用及主要用汽单元之间的换热网络优化等建议,以期提高生产过程中的水资源利用效率.

This study used industrial metabolism analysis to analyze the water utilization process of the glyphosate production system in a pesticide group case study. Based on the analysis, the group＇s water balance accounting was established, and a water metabolism map was provided. Furthermore, the study identified the main water-using and wastewater discharge units in the system and provided some optimization suggestions. The results show that steam is the main kind of water resource in the production system. The heat exchange network （HEN） is rather simple, and a large amount of steam is consumed in the steam consumption units. Furthermore, the steam condensate is not utilized efficiently, and its discharge causes serious waste of water resources. Based on the analysis, the study provides some suggestions such as reuse of the process wastewater and the optimization of the heat exchanger network among the main steam-using units so as to enhance the water utilization efficiency.