Air separation device

The utility model provides an air separation device, which comprises an air separation main body, an air inlet and an air outlet, the main pipeline is communicated with the air separation main body, and high-pressure steam circulates in the main pipeline; the branch pipeline is communicated between the main pipeline and the air separation main body, and a temperature and pressure reducer is arranged on the branch pipeline; the water supply pipeline is communicated with the temperature and pressure reducer and provides temperature and pressure reducing water for the temperature and pressure reducer. And the branch pipelines are communicated with the main pipeline, and the branch pipelines are used for cooling and decompressing the high-pressure steam through the temperature and pressure reducer to form medium and low-pressure steam so as to meet the requirement of steam of various pressure grades required by operation of the air separation device. In the maintenance period of a large coal chemical industry or