Pendimethalin wastewater three-effect evaporative desalting device

The invention discloses a pendimethalin wastewater three-effect evaporative desalting device. The three-effect evaporative desalting device comprises a raw material tank; the discharge pipe of the rawmaterial tank is connected with a motor pump I; the other end of the motor pump I is connected with a filter provided with a filter screen through a pressure limiting valve I; the other end of the filter is connected with a motor pump II; the other end of the motor pump II is connected with a membrane filter provided with a nanofiltration membrane through a pressure limiting valve II; a drain pipe on the membrane filter is connected with a collection box through a window; the filter and the membrane filter are respectively connected with a waste residue discharge pipe and a waste liquid discharge pipe; a detection box is arranged on the waste liquid discharge pipe. The pendimethalin wastewater three-effect evaporative desalting device is reasonable and novel in structural design, the filter screen filters and the