Zero-emission resource utilization system for fracturing flow-back fluid

The utility model discloses a zero-emission resource utilization system for fracturing flow-back fluid. The system comprises an air flotation device, a chemical softening device, a membrane concentration device, a nanofiltration membrane salt separation device, a sodium chloride evaporative crystallization device, a freezing crystallization device, a sodium sulfate melt crystallization device, a sludge gel breaking mixing device, a sludge dewatering device and a product water tank. The beneficial effects of the utility model are that the utility model provides a system with a simple connection relation structure; according to the method disclosed by the utility model, the zero emission of the fracturing flow-back fluid is thoroughly realized, and the secondary environmental pollution risk caused by emission, reinjection or combustion is completely eradicated; and the energy consumption is reduced, and the cost is reduced. 本实用新型公开了一种压裂返排液的零排放资源化利用系统，系统包括气浮装置、化学软化装置、膜浓缩装置、纳滤膜分盐装置、氯化钠蒸发结晶装置、冷冻结晶装置、硫酸钠熔融结晶装置、污泥破胶