Technical Specifications of TRT Turbine Blades
I. Core Applications
TRT (Blast Furnace Top Gas Recovery Turbine Unit) blades are critical components for energy recovery systems in steel plant blast furnaces, primarily used for:
Energy Conversion
Convert pressure energy and thermal energy from blast furnace gas into mechanical energy to drive generators.
Typical scenario: Recover gas pressure (0.2–0.3 MPa) during steelmaking, improving energy utilization by 20–30%.
Pressure Regulation
Stabilize blast furnace top pressure (control accuracy: ±0.5 kPa) via blade angle adjustment, ensuring smooth furnace operation.
Emission Reduction
Replace traditional pressure-reducing valve assemblies, reducing noise pollution (>30 dB noise reduction) and energy waste.
II. Usage & Technical Requirements
(Customized products subject to final delivered specifications)
| Item | Specification |
|---|---|
| Installation & Positioning | Fir-tree tenon-groove connection between blades and rotor disc (surface roughness Ra ≤0.8 μm). |
| Operating Conditions | High temperature (300–600°C), dusty gas (≤10 mg/Nm³), corrosive (H₂S, Cl⁻, etc.). |
Key Maintenance Steps:
Regular Inspections:
Check aluminized coating thickness on blade surfaces (≥0.1 mm).
Inspect tenon/groove micro-cracks (penetrant testing every 5,000 hours).
Cleaning Procedure:
Offline high-pressure water jet cleaning (20–30 MPa) to remove ash and scaling.
III. Core Advantages
Material & Process Superiority
High-Temperature Alloy:
Blade base material: Inconel 718 (nickel-based alloy, oxidation-resistant up to 650°C).
Coating: HVOF-sprayed Cr3C2-NiCr (hardness >800 HV).
Aerodynamic Design:
3D twisted airfoil (efficiency >85%), adaptable to variable flow conditions.
High Efficiency & Energy Savings
Annual power generation per TRT unit:
For 2,500 m³ blast furnace: ~50 million kWh/year (equivalent to reducing CO₂ emissions by 40,000 tons).
Long Service Life
Design life: >100,000 hours (~12 years).
Erosion resistance optimization: Leading-edge hardening + surface boronizing (erosion rate <0.1 mm/year).
Intelligent Monitoring
Built-in vibration monitoring points (FFT spectrum analysis).
Real-time root stress monitoring (fiber optic sensing technology).
IV. Comparison with Traditional Pressure-Reducing Valve Assemblies
| Parameter | TRT Turbine Blades | Pressure-Reducing Valves |
|---|---|---|
| Energy Utilization | 25–35% energy recovery | 100% energy waste |
| Noise Level | ≤85 dB(A) | ≥115 dB(A) |
Note: TRT blades require custom anti-corrosion coating solutions based on gas composition (e.g., CO, H₂ content). Selection calculation sheets (e.g., gas flow rate, pressure gradient) are available upon request.
(Translated with strict adherence to technical terminology, ISO unit standards, and industry-specific formatting conventions.)