Circulating cleaning device

The utility model relates to a circulating cleaning device which comprises a preheater, a cleaning tank and a cleaning pump. An inlet of the cleaning pump is connected with the cleaning tank, an outlet of the cleaning pump is connected with an inlet of the preheater, and an outlet of the preheater is connected with the cleaning tank. The cleaning agent is conveyed to the preheater through the cleaning pump for cleaning, after cleaning is conducted once, the cleaning agent returns to the cleaning tank, and circulating continuous cleaning is achieved through the cleaning pump. And during the cleaning period of the preheater, the valve for the materials to enter the preheater is closed, and the bypass valve is opened. According to the utility model, the preheater can be circularly cleaned under the working conditions that the equipment is not shut down and the preheater is not disassembled. 本实用新型涉及一种循环清洗装置，其包括了预热器、清洗罐、清洗泵。所述的清洗泵入口与清洗罐相连，清洗泵出口与预热器入口相连，预热器出口与清洗罐相连。所述清洗剂通过清洗泵输送到预热器进行清洗，清洗一次后，清洗剂返回清洗罐，通过清洗泵实现循环连续清洗。