Industrial grade polyphosphoric acid production system

The utility model discloses an industrial grade polyphosphoric acid production system has solved harsh complicated, the rate of recovery is low, concentration the is low problem of process consideration that current wet cleaning phosphoric acid manufacture industrial grade polyphosphoric acid exists, and technical scheme includes the flash chamber, the export of the recycle acid of flash chamber is in proper order through circulating pump, the sour heater recycle acid access connection with the flash chamber, the sour exit linkage finished product acid cooler of finished product of flash chamber, be equipped with in flash chamber and sour heater connection's the pipeline and purify the phosphoric acid import. The utility model discloses the system is reliable, equipment investment and running cost are low. 本实用新型公开了种工业级聚磷酸生产系统，解决了现有湿法净化磷酸生产工业级聚磷酸存在的工艺条件苛刻复杂、回收率低、浓度低的问题，技术方案包括闪蒸室，所述闪蒸室的循环酸出口依次经循环泵、酸加热器与闪蒸室的循环酸进口连接，所述闪蒸室的成品酸出口连接成品酸冷却器，所述闪蒸室和酸加热器连接的管路中设有净化磷酸进口。本实用新型系统可靠、设备投资和运行成本低。