Sugar feeding system

The feeding system comprises a liquid storage tank, a gas pipeline, a mixing valve, an atomizing nozzle, a first feeding pipeline and a second feeding pipeline, wherein the first feeding pipeline and the second feeding pipeline are connected with a liquid outlet of the liquid storage tank; the first feeding pipeline comprises a first output pipeline and a first return pipeline, the first output pipeline is sequentially provided with a first electric valve, a first feeding pump and a first flow meter from a liquid outlet to the mixing valve, and the first return pipeline is sequentially provided with a third electric valve and a third flow meter from the output end of the first feeding pump to a first liquid return opening of the liquid storage tank; the second charging pipeline comprises a second output pipeline; the second output pipeline is sequentially provided with a second electric valve, a second charging pump and a second flow meter from the liquid outlet to the mixing valve; the output end of the mixi