Gas steam boilers typically run on natural gas, LPG, city gas or biogas, which are piped to the burner, burned to heat the boiler water, and generate high-pressure, high-temperature steam.
1. Core Working Principle
- Combustion: Gas ignites in the burner, generating flue gases (>1,000°C / 1,832°F).
- Heat Transfer:
- Fire-Tube: Gases pass through tubes submerged in water. Steam output: 1–30 t/h at <3.8 MPa (<550 psi).
- Water-Tube: Water circulates in tubes heated externally. Capacity: 10–200 t/h at ≤5 MPa (≤725 psi).
- Steam Separation: Drum removes moisture for ≥99% dry steam.
- Distribution: Steam flows to processes via pipelines.
2. Design Comparison
| Feature | Fire-Tube Boiler | Water-Tube Boiler |
|---|---|---|
| Capacity | 1–30 t/h | 10–200 t/h |
| Pressure | <3.8 MPa (<550 psi) | ≤5 MPa (≤725 psi) |
| Use Cases | Small factories, hospitals | Power plants, refineries |
3. FangKuai’s Efficiency Edge
- Winged Finned Tubes: 6× faster heat transfer → 30–50% smaller footprint.
- Condensing Tech: Captures latent heat → >95% efficiency.
- Smart Controls: Optimize fuel/air ratios.
4. Pros and Cons of Gas Steam Boilers
| Advantages | Limitations |
|---|---|
| 90–95% efficiency | Requires gas pipeline/LPG storage |
| 80% lower SO₂/NOx vs. coal | High-pressure safety critical (ASME valves) |
| Easy automation | Initial cost premium |
5. Gas Steam Boiler Price Analysis (USD)
Factors driving cost:
- Tonnage: Higher capacity = higher price
- Pressure: >3.8 MPa adds 15–20%
- Efficiency: Condensing models cost 10–15% more
| Capacity (t/h) | Price (USD) | Typical Applications |
|---|---|---|
| 1–10 | 69,000 | Textiles, food processing, small plants |
| 20–50 | 207,000 | Hospitals, chemical plants |
| 100–300 | $280,000+ | Power generation, oil refineries |
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6. Key Industries Using Gas Steam Boilers
- Food/Pharma: Sterilization (1–20 t/h, ≤1.0 MPa/145 psi)
- Textiles: Dyeing/drying (≤3.8 MPa/550 psi)
- Energy/Heating: Power turbines/district heating (≥100 t/h, ≤5 MPa/725 psi)
Conclusion
Gas steam boilers deliver scalable, efficient steam for diverse industries. FangKuai’s range (1–300 t/h) combines compact finned-tube designs and condensing tech for maximum ROI. For reduced footprint and industry-leading efficiency, their gas steam boiler solutions are engineered to exceed expectations.
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