Storage tank water extracting circulating system

The invention relates to improvement of a novel storage tank water extracting circulating system, and belongs to the field of storage tank water extracting. The system comprises a storage tank and a water extractor, wherein a water extracting pit is arranged at the bottom of the storage tank, the water extracting pit is connected to an inlet of the water extractor through a water extracting pipe,the water extracting pipe is connected with an oil return pipe, the oil return pipe communicates with the storage tank, and a pneumatic diaphragm pump is arranged on the oil return pipe. According tothe system, a valve is installed above an inlet line of the water extractor, and oil product at the inlet of the water extractor is conveyed into the storage tank through the pneumatic diaphragm pump,so that outward discharging of the oil product is reduced, and the environment-friendly and safe effect is achieved. 本发明涉及改进一种新型储罐切水循环系统，其属于储罐切水领域，包括储罐和切水器，所述储罐底部设置切水坑，所述切水坑通过切水管连接到切水器入口，切水管连接回油管，回油管连通至储罐，回油管上设置气动隔膜泵。通过本发明将切水器