APPARATUS FOR PRODUCING ATMOSPHERIC GAS

摘要

PURPOSE:To obtain a gas consisting essentially of N2 and having stabilized contents of CO and O2 at low temp. by providing a catalytic reactor for passing a catalytic combustion waste gas and reducing the oxygen in the gas on the downstream side of an oxygen partial pressure detector. CONSTITUTION:Zirconia is used as the detecting cell in an oxygen partial pressure detector 6. A gas to be measured is introduced into the detected by utilizing the pressure difference between an inlet pipeline 6a and an outlet pipeline 6b and the oxygen partial pressure is detected by the detecting cell. The value of the detected oxygen partial pressure is fed to a regulator 7, a flow control valve 8 is controlled on the basis of the value so that the theoretical air fuel ratio can be obtained in the combustion in the first catalyst reactor 1 and the supply of hydrocarbonic fuel 9 is controlled. A waste gas 10 contg. oxygen is supplied from the upstream side of the first catalytic reactor 1 and mixed with the hydrocarbonic fuel 9. The gaseous mixture is passed through the catalytic reactor 1, a pipeline and a catalytic reactor 2.