Vehicle-Mounted Hydrogen Supply Method and Device for Hydrogen-Rich Smelting in Blast Furnace or Shaft Furnace

A vehicle-mounted hydrogen supply method for hydrogen-rich smelting in a blast furnace or shaft furnace, comprising the following steps:

• S1:
• establishing a plurality of designated working parking spaces at designated positions in or near a steel smelting plant;
• S2:
• computing the number N1 of hydrogen transport apparatuses in transit and the number N2 of hydrogen transport apparatuses that can supply hydrogen normally in dedicated parking spaces according to a distance between a hydrogen supply station and the designated working parking spaces and daily hydrogen demand of the steel smelting plant, wherein N2>3;
• S3:
• dividing the hydrogen transport apparatuses that can supply hydrogen normally in the designated working parking spaces into working long pipe vehicles and standby long pipe vehicles, wherein at least two working long pipe vehicles are provided, namely a first working long pipe vehicle and a second working long pipe vehicle, and at least one standby long pipe vehicle is provided;
• dividing hydrogen long pipe vehicles in transit into fully-loaded long pipe vehicles and no-load long pipe vehicles according to the hydrogen content therein;
• and
• S4:
• respectively connecting the two working long pipe vehicles to a pressure reducing system;
• reducing the pressure of high pressure hydrogen in the first working long pipe vehicle by the pressure reducing system, and then, injecting the high pressure hydrogen with the pressure reduced into an injection system, in a case that a hydrogen pressure value in the first working long pipe vehicle is lower than a set pressure supply value, opening an intake pipeline of the second working long pipe vehicle, and cutting off an intake pipeline of the first working long pipe vehicle;
• at the same time, connecting the cut-off intake pipeline to the standby long pipe vehicle to become a new working long pipe vehicle;
• at this time, marking the first working long pipe vehicle whose hydrogen supply is cut off as a no-load long pipe vehicle, and immediately driving the vehicle out of the steel smelting plant towards the hydrogen supply station for adding hydrogen;
• before a hydrogen pressure value in the second working long pipe vehicle is lower than the set pressure supply value, enabling at least one fully-loaded long pipe vehicle in transit to enter the steel smelting plant and stop in the designated working parking space to become a standby long pipe vehicle;
• and achieving vehicle-mounted cyclic hydrogen supply.

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 normally 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 the 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;
• the output main pipe is provided with a first check valve and a rapid cut-off valve in sequence, one end is connected to the output ends of the first pressure reducing branch and the second pressure reducing branch, and the other end is connected to an injection system;
• the injection system, comprising an annular main pipe connected to an 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 hydrogen 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 the pressure value of the intake pipeline.