超临界水氧化设备的能量平衡

摘要

Supercritical water oxidation (SCWO) is a high-efficiency organic wastewater treatment technology.When exceeding the critical phase transition point of water (Tc =374.3 ℃,Pc =22.05 MPa),most non-polar organic compounds solubilty enhanced greatly.In supercritical condition,water showed excellent transport property and high diffusivity so that oxygen,supercritical water and organic compounds could become miscible.Organic compounds could be degraded completely in a short time.By using a pilot scale SCWO equipment (5 t/d),energy utilization was analyzed.The simulated equation about power consumption,operation parameters and influent quality could be established to estimate electricity consumption during operation,besides that,this model was significant for reactor and engineering design.%超临界水氧化技术是一种高效的有机废水处理技术,当反应温度和压力都超过水的相变临界点(Tc =374.3℃,Pc=22.05 MPa)时,大多数非极性有机物的溶解性大大增强,与水、氧气等形成均相体系,有机物能在很短时间内被彻底氧化降解.通过利用自主研发5 t/d的超临界水氧化(SCWO)中试装置,分析设备的能量利用,得到耗电量与运行参数和进水水质之间的关系式,可以估算出设备运行所需要消耗的电能或产出的过热能量,对设备与工程设计具有重大意义.