Pressure swing adsorption system convenient to overhaul

The invention relates to the field of hydrogen purification, and discloses a pressure swing adsorption system convenient to overhaul, which comprises at least two adsorption tower groups, each adsorption tower group is communicated with a raw material pipe and a product pipe, each raw material pipe and each product pipe are communicated with a branch pipe, the feeding end of each raw material pipe is communicated with a raw material gathering pipe, and the feeding end of each product pipe is communicated with a product gathering pipe. The discharge ends of the product pipes are communicated with the product gathering pipe; stop valves are arranged on the branch pipes, the raw material gathering pipe and the product gathering pipe, and are positioned between the two adsorption tower groups. According to the technical scheme, the problems that the hydrogen purification yield is reduced and the production cost is increased due to the fact that the program control valve in the pressure swing adsorption system can