Vehicle-mounted hydrogen supply method and device for hydrogen-rich smelting in blast furnace or shaft furnace

A vehicle-mounted hydrogen supply device for hydrogen-rich smelting in a blast furnace or shaft furnace, comprising:

• hydrogen transport apparatuses, configured to transport hydrogen from a hydrogen supply station to a steel smelting plant, and at least comprising a first working long pipe vehicle, a second working long pipe vehicle and a standby long pipe vehicle, wherein the first working long pipe vehicle, the second working long pipe vehicle and the standby long pipe vehicle can supply hydrogen and are all located in designated working parking spaces of the steel smelting plant;
• a pressure reducing system, comprising an intake pipeline, a pressure reducing pipeline and an output pipeline connected in sequence, wherein the output pipeline comprises an output main pipe;
• the intake pipeline at least comprises a first intake branch and a second intake branch;
• input ends of the first intake branch and the second intake branch are respectively connected to the first working long pipe vehicle and the second working long pipe vehicle, and the first intake branch and the second intake branch are both provided with a manual butterfly valve and a first stop valve;
• the pressure reducing pipeline at least comprises a first pressure reducing branch and a second pressure reducing branch;
• input ends of the first pressure reducing branch and the second pressure reducing branch communicate with each other and are connected to output ends of the first intake branch and the second intake branch, and output ends of the first pressure reducing branch and the second pressure reducing branch communicate with each other and are connected to an input end of the output main pipe of the output pipeline;
• the output main pipe is provided with a first check valve and a rapid cut-off valve in sequence, the input end of the output main pipe is connected to the output ends of the first pressure reducing branch and the second pressure reducing branch, and an output end of the output main pipe is connected to an injection system;
• the injection system, comprising an annular main pipe connected to the output end of the output main pipe, wherein an output end of the annular main pipe is provided with a plurality of injection branch pipes, and each injection branch pipe is connected to a tuyere of the blast furnace through a metal hose and a fire arrestor;
• and
• a control system, comprising a transport computing module and a pressure reducing control module, wherein:
• the transport computing module computes the number of long pipe vehicles in transit according to an inputted distance between the hydrogen supply station and the steel smelting plant and daily hydrogen demand of the steel smelting plant;
• and
• the pressure reducing control module cyclically opens the first pressure reducing branch and the second pressure reducing branch according to a pressure value of the intake pipeline.