All-tube bundle washing system for vapor generator and washing method

The invention discloses an all-tube bundle washing system for a vapor generator. The washing system comprises spray barrel assemblies, a suction tool, a suction unit, a filtering unit, a main water tank unit, a washing pump unit and an air control branch pipeline which communicate in sequence through a circulating water pipeline; the spray barrel assemblies and the suction tool are arranged on thevapor generator; one end of the air control branch pipeline communicates with one end of each spray barrel assembly, and the other end of the air control branch pipeline communicates with the washingpump unit; the washing pump unit is used for delivering water in the main water tank unit to the spray barrel assemblies; the spray barrel assemblies are used for receiving the water and releasing the water after a preset water level is reached; and the suction unit includes suction pumps. According to the all-tube bundle washing system for the vapor generator, a medium-flow circulating water loop is established between t