Aluminum alloy fluorine-free and COD-free three-in-one plain glass pretreatment drug recovery system

Aluminum alloy fluorine-free and COD-free three-in-one plain glass pretreatment drug recovery system, comprises a three-in-one plain glass tank and a non-flow tank subsystem. The non-flow tank subsystem is arranged in reverse series arrangement, a begin end of water flow is provided with a water inlet, a terminal outlet is connected to a water replenishing port of the three-in-one plain glass tank through a one-way valve device. The aluminum alloy fluorine-free and COD-free three-in-one plain glass pretreatment drug recovery system retains and reuses the drug, and reduces the unnecessary waste of the drug. 铝合金无氟无COD三合平光前处理药剂回收系统，所述药剂回收系统包括三合平光槽和不流动水洗槽子系统，所述不流动水洗槽子系统整体反向串联设置，且其水流动方向的始端设有进水口，其终端的出水口通过补水单通阀装置连接于所述三合平光槽的补水口。本发明提出种铝合金无氟无COD三合平光前处理药剂回收系统，截留、回用药剂，降低药剂不必要的浪费。