High volatile bituminous coal injection blast furnace tuyere injection lance structure and application thereof

Abstract

The application provides a high volatile bituminous coal injection blast furnace tuyere injection lance structure and application thereof, which comprises a lance conveying inner pipe, a lance conveying outer pipe and a cooling water pipeline coaxially and sequentially sleeved from inside to outside, a track assembly is arranged between the lance conveying inner pipe and the lance conveying outer pipe to realize relative movement of the lance conveying inner pipe and the lance conveying outer pipe; the lance structure further comprises a flow guide baffle arranged on a lance head of the lance conveying inner pipe along an injection direction, and a baffle adjusting unit connected with the flow guide baffle, the baffle adjusting unit controls the flow guide baffle to make outward diffusion or inward contraction movement relative to the lance head, and realizes regulation and control on the direction and diffusion mode of the pulverized coal flow and the gas flow. The lance structure is designed, the pulverized coal injection, oxygen enrichment and blast are promoted to realize efficient heat, momentum and mass transfer in an external intervention mode, efficient utilization of the pulverized coal is realized, the combustion rate of the high volatile bituminous coal injection in the blast furnace tuyere rotation zone is improved, and the applicability of the tuyere injection lance structure is improved.

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