High-purity krypton gas extraction device

The utility model belongs to the technical field of krypton gas extraction, and particularly relates to a high-purity krypton gas extraction device which comprises a catalysis column, a thermocouple is attached to the middle end of the catalysis column, the catalysis column is arranged in a tubular furnace cavity, and the gas inlet end of the catalysis column is connected with a gas outlet of a gas mixing tank. A gas inlet of the gas mixing tank is connected with a krypton pressure bottle and an oxygen pressure bottle through two valve assemblies, a gas outlet end of the catalytic column is connected with a recovery pipeline and a molecular sieve column through a first three-way valve, a gas inlet valve is installed between the first three-way valve and the molecular sieve column, and a heating belt is arranged on the outer side of the molecular sieve column which is connected with a plate heat exchanger. The plate heat exchanger is connected with the finished product pipeline and the vacuum pump through a se