Natural gas dehydration/carbon dioxide device and process

The invention relates to a device and a process for removing water and carbon dioxide from natural gas, in particular to a device, a process and a method for simultaneously removing water and carbon dioxide by adopting a molecular sieve adsorbent. The device comprises an adsorption tower, a regenerated gas cooler, a regenerated gas separator, an electric heater, a program control valve, a throttling valve, a flow meter, a pressure regulating valve, a temperature and pressure measuring instrument, an analyzer, a control system and the like. Compared with traditional natural gas dehydration/carbon dioxide and the same impurity adsorption amount, the four-tower process is adopted, and the adsorbent filling amount of a single tower is only half of that of three towers; meanwhile, different air sources are adopted for heating and cold blowing during regeneration, so that different air quantities can be adjusted according to requirements; the heating gas flow is adjusted according to the requirement of a station ma