CE Certified Galvanizing Furnace System with Dual-Zone Thermal Regulation and Heat Recovery for Zinc Tank Line
This CE automatic pulse heating galvanizing furnace system is designed for industrial hot-dip galvanizing lines requiring stable zinc bath temperature control, uniform heat distribution, and continuous production reliability.
The system combines a zinc kettle structure, pulse combustion furnace, dual-zone thermal regulation, exhaust heat recovery, and PLC automation control. It is suitable for large-scale galvanizing production environments with flexible tank dimensions and high thermal load demand.
Typical engineering configuration supports zinc tanks such as 7000 *1200*2200 mm (L*W*D) and furnace bodies around 9000 *3200*1800 mm, depending on production capacity and line layout.
In conventional galvanizing heating systems, process instability mainly comes from:
| Issue | Technical Impact |
|---|---|
| Temperature inertia | Slow response → overshoot/undershoot of zinc bath temperature |
| Uneven furnace heating | Local overheating → inconsistent coating quality |
| No heat recovery | High fuel consumption and energy waste |
| Weak process visibility | Limited real-time monitoring of furnace conditions |
| Thermal stress accumulation | Reduced service life of zinc kettle structure |
The system is engineered around closed-loop thermal control and energy optimization:
| Feature | Function |
|---|---|
| High-speed pulse burner | Dynamic adjustment of combustion intensity |
| PID control loop | Real-time temperature correction |
| Auto mode switching | Heating ↔ stabilization near target temperature |
| Component | Function |
|---|---|
| Zone 1 & Zone 2 heating chambers | Independent thermal balancing |
| K-type thermocouples (dual set) | Control + verification monitoring |
| Zinc bath sensors | Direct molten zinc temperature feedback |
| Item | Performance |
|---|---|
| Flue gas utilization | Preheats incoming combustion air |
| Energy optimization | ~10% fuel consumption reduction (process-dependent) |
| Module | Function |
|---|---|
| PLC control system | Central process logic execution |
| HMI interface | Real-time monitoring & operation |
| Flow control valves | Fuel-air ratio adjustment |
| Alarm system | Fault detection and safety interlock |
| Parameter | Value |
|---|---|
| Zinc liquid working temperature | 435-450°C ±2°C |
| Furnace flue temperature | ≤650°C |
| Furnace wall temperature | ≤50°C |
| Temperature fluctuation | ±2°C |
| Heating uniformity | ±2°C |
| Heating rate | 60-200°C/h adjustable |
| Parameter | Value |
|---|---|
| Burner configuration | 2 units |
| Burner power | 450 kW * 2 |
| Fuel consumption | ~30 kg/hour (reference condition) |
| Fuel type | Natural gas / Heavy oil (optional) |
| Parameter | Value |
|---|---|
| Zinc tank capacity | up to ~280 tons (design-dependent) |
| Typical tank size | 7000*1200*2200 mm |
| Annual production capacity | up to 20,000 tons |
| Structure Item | Technical Description |
|---|---|
| Furnace shell | 6 mm reinforced steel plate welded structure |
| Insulation system | Fire-resistant fiber modules + insulation filling |
| Support structure | Steel frame to reduce zinc pot deformation |
| Safety design | Zinc leakage detection + collection pit |
| Pressure system | Furnace pressure relief design for safety operation |
- Steel structure hot-dip galvanizing lines
- Transmission tower and power pole galvanizing
- Heavy fabrication industrial plants
- Hardware and fastener surface treatment
- Infrastructure corrosion protection systems
- Continuous large-scale galvanizing production lines
| Step | System Action |
|---|---|
| 1 | Thermocouples collect furnace + zinc bath temperature data |
| 2 | PLC compares real-time data with target setpoint |
| 3 | PID algorithm calculates correction signal |
| 4 | Burner air valve adjusts combustion intensity |
| 5 | System switches between heating / stabilization modes |
| 6 | Zinc bath temperature gradually stabilizes within target range |
Control objective: Maintain zinc bath temperature stability while minimizing overshoot and thermal inertia effects.
| Factor | Selection Logic |
|---|---|
| Tank size | Determines furnace geometry and heating distribution |
| Output capacity | Defines burner power and system scale |
| Fuel type | Natural gas vs heavy oil system design |
| Automation level | Manual / semi-auto / full PLC integration |
| Production scale | Single line vs multi-zone continuous system |
A dual-zone furnace structure combined with PLC-based PID control reduces temperature fluctuation to within ±2°C under normal operation.
Yes, it supports large-scale tanks such as 7000*1200*2200 mm or customized industrial dimensions depending on layout design.
Yes. The system supports both natural gas and heavy oil combustion configurations with automatic flow control.
Exhaust gas is reused to preheat combustion air, reducing fuel consumption by approximately 10% under standard operating conditions.
Structural reinforcement, zinc leakage detection system, pressure relief design, and real-time monitoring all contribute to stable long-term operation.
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