A method for optimizing hydrogen-rich carbon cycle oxygen blast furnace tuyere injection structure
By optimizing the tuyeres injection structure of the hydrogen-rich carbon-circulating oxygen blast furnace, the problems of ultra-high temperature burn-off and mechanical erosion caused by the combustion of strong reducing components with oxygen in the tuyeres have been solved, achieving long service life and efficient combustion of the tuyeres and ensuring stable operation of the blast furnace.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-30
- Publication Date
- 2026-07-17
AI Technical Summary
In hydrogen-rich carbon-circulating oxygen blast furnaces, the traditional tuyere structure suffers from ultra-high temperatures caused by the combustion of strong reducing components with oxygen, resulting in burn-out and melting of the tuyere wall. Furthermore, the displacement of the pulverized coal stream causes mechanical erosion, severely affecting the tuyere's lifespan and equipment stability.
By establishing a three-dimensional geometric model and using a multiphase flow chemical reaction coupled numerical model, turbulent flow, heat and mass transfer, pulverized coal combustion and coke gasification reaction are simulated. The tuyere injection structure is optimized, including oxygen pipe parameters, tuyere body structure and coal gun parameters. Combined with multi-index evaluation, the optimal design scheme that balances equipment safety and combustion efficiency is determined.
It significantly reduces the peak heat load on the tuyeres wall, reduces the risk of burn-off, improves fluid momentum matching, reduces the probability of pulverized coal flow deviation scouring the wall, improves pulverized coal burnout rate, extends tuyeres life, and ensures stable blast furnace operation.
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