Technical Parameters of Lanhao Steel Mill Blast Furnace Pulverized Coal Distributor (DN100-22×DN25, PN1.6MPa)
I. Core Specifications
Parameter Value Remarks
Main Diameter DN100 (Inlet) Compatible with blast furnace pulverized coal main pipe
Branch Configuration 22×DN25 (Outlet) Vertical layout, single branch length ≥1.2m
Design Pressure 1.6MPa Complies with GB/T 12238 standard
Lining Material Carbon steel base + wear-resistant ceramic Mohs hardness ≥9, lifespan increased by 3 times
Distribution Accuracy E2≤5% (Standard error method) Measured pulverized coal flow deviation ≤3%

II. Structural Features
Tapered Distribution Structure
Adopts conical flow guide disc design, eliminates pulverized coal vortex, reduces resistance loss by 40% compared to bottle-type.
Wear Resistance Enhancement
Key contact surfaces (cone, branch inlet) use plasma-sprayed ceramic layer, thickness ≥2mm.
Pressure Monitoring Interface

Branch outlets reserved with pressure measurement points, supporting real-time monitoring of differential pressure in each branch (accuracy ±0.01MPa).
III. Application Scenarios
Oxygen-Enriched Injection: Compatible with 0.3MPa compressed air, supports mixed injection with oxygen concentration ≤30%.
Multi-Tuyere Balance: Achieves uniform pulverized coal distribution across 22 blast furnace tuyeres via 22 branches, thermal load fluctuation ≤5%.

IV. Installation and Maintenance
Vertical Installation
Branch angle with horizontal plane ≥85°, avoiding powder accumulation.
Air Tightness Test
Requires pressure holding test at 1.25 times working pressure (2.0MPa), leakage rate ≤0.5%.