Adiabatic-isothermal shift technique for high-concentration CO raw gas

The invention provides a novel CO sulfur-tolerant shift technique which at least comprises a CO sulfur-tolerant shift production procedure composed of an adiabatic shift section and an isothermal shift section. Compared with the traditional adiabatic shift technique, the technique can simplify the shift process, reduce the equipment investment, lower the system resistance and reduce the one-time use amount of the catalyst. Compared with the direct isothermal shift technique, the isothermal reactor is arranged after the adiabatic reactor, the reaction heat generated by the primary adiabatic shift can ensure the inlet temperature of the isothermal shift reactor and avoid the problem of difficulty in self balancing of heat quantity in the direct isothermal shift technique, and thus, the technique can reasonably utilize the energy, avoid the problem of blockage since dust and other impurities in the raw gas enter the isothermal reactor, and ensure the long-period stable operation of the complete device.