Waste water treatment system with buffering device and waste water treatment method therefor

A waste water treatment system with a buffering device, comprising a waste water pretreatment device, an evaporator, a circulation crystallizer, a crystal filtration device, a dehydration device, a primary buffering device and a secondary buffering device;

• the waste water pretreatment device, the evaporator, the circulation crystallizer, the crystal filtration device, the dehydration device are sequentially communicated;
• one end of the primary buffering device is in bidirectional communication with the circulation crystallizer and the other end is connected with the evaporator;
• the secondary buffering device is in bidirectional communication with the circulation crystallizer;
• both the primary buffering device and the secondary buffering device include a plurality of buffers, each of the plurality of buffers is provided with a detection element related to a liquid level, and the circulation crystallizer is provided with a detection element related to a concentration;
• the system further comprises a controller that is in data communication with a central controller of the system and is also connected to each detection element related to the liquid level and the detection element related to the concentration, respectively.