Purification method for synthesis gas at outlet of organic hazardous waste plasma gasification melting furnace

The invention discloses a purification method for synthesis gas at an outlet of an organic hazardous waste plasma gasification melting furnace, and belongs to the technical field of organic hazardous waste treatment. The method mainly comprises the following steps: a synthesis gas outlet of a plasma gasification melting furnace is communicated with an outer annular gap channel of a conversion burner on a conversion furnace through a pipeline, so that crude synthesis gas generated by the plasma gasification melting furnace is sprayed into the conversion furnace through the outer annular gap channel; an oxygen source is communicated with an inner central pipeline of the reforming burner, so that oxygen generated by the oxygen source is sprayed into the reforming furnace together with crude synthesis gas through the inner central pipeline, and meanwhile, the relationship among the pressure, flow and temperature of the crude synthesis gas and the oxygen is limited. According to the method, the problem that crude