Research on Air-Lift Material-Liquid Conveying System Based on Multimodal Air Source Split-Range Control and its Control Strategy

Aiming at the problems of narrow flow control range and slow response speed in the transportation of highly radioactive material in the nuclear fuel reprocessing process, this paper proposes an air lifting material transportation system and control method based on the split-range control of multimodal air source. By constructing a parallel two-stage air lifting device architecture, combined with the split-range control algorithm to co-regulate multiple mass flow controllers, the system indirectly realizes a wide range of high-precision control of the flow rate of material liquid conveying. The experimental results show that compared with the traditional two-stage air lifting liquid delivery system, the adjustable range of the lifting liquid flow rate can be enlarged by 100%, and the response time of the system can be shortened to less than 10 s through the optimization of the staging transfer function. This study provides an innovative solution for the precise transportation of liquid under radioactive environment.