Synthetic gas deep-decarbonization technology

A synthetic gas deep-decarbonization technology is characterized in that shift gas is introduced into a separator through a pipeline, the gas outlet of the separator is connected to a winding heat exchanger through a pipeline, the gas outlet of the winding heat exchanger is connected to a desulfurization and decarbonization tower through a pipeline, a part of a purified gas output from the decarbonization and desulfurization tower is introduced into a fine decarbonization tower for deep decarbonization, the remaining purified gas is introduced into a special winding heat exchanger through a special separator, and a treated gas is introduced into a methanol synthesis device; a deeply decarbonized purified gas is goes through the winding heat exchanger, and is introduced into a PSA device through a pipeline, and an exhausted gas generated by an ethylene glycol device is guided into the methanol synthesis device through a pipeline; and rich methanol in the fine decarbonization tower is fed into the desulfurizati