Steam-water series isothermal transformation device capable of generating superheated steam

The invention discloses a steam-water series isothermal conversion device capable of generating superheated steam, which belongs to the technical field of CO conversion and comprises a heat insulation conversion furnace, a first detoxification tank, a second detoxification tank, two isothermal conversion furnaces, a steam pocket, a heat exchanger, related pipelines, valves and the like. Crude synthesis gas is connected with a first detoxification tank and a second detoxification tank through a heat exchanger, one path of an outlet of each detoxification tank is connected with an inlet of a heat insulation conversion furnace, the other path of the outlet of each detoxification tank is connected with an inlet of a second isothermal conversion furnace, converted gas outlets are converged and then connected with the heat exchanger, and an outlet of the heat exchanger is connected with a third isothermal conversion furnace; a steam pocket circulating hot water outlet is connected with a heat exchange tube bundle i