Deoxidation method and device for converter gas

The invention provides a deoxidation method and device for converter gas. The deoxidation method includes the following steps that the converter gas is subjected to dust removal, and the dust content in the converter gas with dust removed is smaller than 5 mg/nm ; the converter gas with dust removed is conveyed into a deoxidation device which is filled with stainless steel balls with surfaces plated with copper, the temperature in the deoxidation device is controlled to be 150-300 DEG C, and the oxygen content in deoxidized converter gas is smaller than 200 ppm; the deoxidized converter gas is air-cooled to room temperature and conveyed to a downstream microbial anaerobic fermentation procedure. According to the requirements of raw converter gas in the microbial anaerobic fermentation process, a simple and efficient novel deoxidizing agent is designed, that is, the surfaces of the stainless steel balls are plated with a layer of copper. Oxygen is consumed according to the principle that copper and oxygen react to generate copper oxide, and the aim of deoxidation is achieved. The deoxidation device is easy to design, economical, reasonable and capable of removing oxygen in the converter gas at low energy consumption to meet the requirements of the fermentation process.