Product Overview
The SZS Series Gas/Oil-Fired Water-Tube Steam Boiler is designed for reliable, high-capacity industrial steam supply. Its longitudinal double-drum D-type layout, membrane water-wall furnace, and ample heating surfaces support stable output and efficient heat transfer. An optimized combustion system with flue-gas heat recovery reduces fuel consumption, while optional ultra-low-NOx configurations, automatic controls, and multi-layer safety interlocks support efficient, environmentally responsible operation. Factory preassembly and modular delivery options help streamline installation across a wide range of project sizes.
Product Structure Drawing
Key Advantages
A spacious combustion chamber and spiral-finned heat-recovery system improve combustion and recover exhaust heat, supporting thermal efficiency of ≥98% under specified design conditions.
Flue gas recirculation (FGR), staged combustion, and a matched burner can achieve NOx ≤30 mg/Nm³ on specified natural-gas configurations, subject to emission test conditions and commissioning.
The longitudinal double-drum D-type structure and close-pitch membrane water walls enhance furnace sealing, radiant heat absorption, and durability while reducing refractory maintenance.
Ample heating surfaces and steam-water capacity promote stable steam pressure and output. Sliding supports beneath the lower drum accommodate thermal expansion during operation.
Automatic controls monitor feedwater, steam pressure, flame status, and water level. A furnace pressure-relief door can be provided where required by the approved design.
Factory preassembly and transport-ready modular sections reduce on-site work and installation time. Delivery arrangements are tailored to boiler capacity and shipping constraints.
Typical Applications
Cooking、Pasteurization、Sterilization、Cleaning、Evaporation、Drying
Dyeing、Bleaching、Washing、Sizing、Printing、Drying、Finishing
Reactor Heating、Distillation、 Evaporation、Drying、Stripping、Tank Heating 、Cleaning
Pulp Cooking、Evaporation、Paper Drying、Starch Preparation、Coating、Tank Heating、Cleaning
Rubber Vulcanization、Compounding、Mold Heating、Process Water Heating、Equipment Cleaning、Drying
Space Heating、Domestic Hot Water、Campus Heating、Public Building Heating、Industrial Heat Supply、Peak-Load Support
Technical Specifications
| Item | Model | SZS2-2.5-Q.Y | SZS4-2.5-Q.Y | SZS6-1.25-Q.Y SZS6-1.6-Q.Y SZS6-2.5-Q.Y | SZS10-1.25-Q.Y SZS10-1.6-Q.Y SZS10-2.5-Q.Y | SZS15-1.25-Q.Y SZS15-1.6-Q.Y SZS15-2.5-Q.Y | SZS20-1.25-Q.Y SZS20-1.6-Q.Y SZS20-2.5-Q.Y | SZS25-1.25-Q.Y SZS25-1.6-Q.Y SZS25-2.5-Q.Y | SZS30-1.25-Q.Y SZS30-1.6-Q.Y SZS30-2.5-Q.Y | |
| Rated evaporation capacity | t/h | 2 | 4 | 6 | 10 | 15 | 20 | 25 | 30 | |
| Rated working pressure | MPa | 2.5 | 2.5 | 1.25/1.6/2.5 | 1.25/1.6/2.5 | 1.25/1.6/2.5 | 1.25/1.6/2.5 | 1.25/1.6/2.5 | 1.25/1.6/2.5 | |
| Rated steam temperature | °C | 225 | 225 | 194/204/225 | 194/204/225 | 194/204/225 | 194/204/225 | 194/204/225 | 194/204/225 | |
| Feed water temperature | °C | 20 | 20 | 20 | 104/20 | 104/20 | 104/20 | 104/20 | 104/20 | |
| Heating area | Body | m² | 46.22 | 90.22 | 125.60 | 205.56 | 216.84 | 271.50 | 285.24 | 392.34 |
| Economizer | m² | 23.3 | 35.8 | 63.4 | 132.2 | 283.6 | 411.2 | 504.8 | 471.2 | |
| Condenser | m² | 15.0 | 25.4 | 41.5 | 62.8 | 101.1 | 134.7 | 168.3 | 252.4 | |
| Suitable fuel | Natural gas, biogas, coke gas, light oil, methanol, biodiesel etc. | |||||||||
| Fuel consumption | Natural gas | Nm³/h | 144 | 288 | 432 | 720 | 1080 | 1440 | 1800 | 2160 |
| Light oil | kg/h | 124 | 244 | 372 | 620 | 930 | 1240 | 1550 | 1860 | |
| Thermal efficiency | % | >98 | >98 | >98 | >98 | >98 | >98 | >98 | >98 | |
| Max. transportation weight | t | 20.4 | 25.0 | 32.0 | 40.0 | 45.0 | 50.6 | 60.0 | 68.2 | |
| Overall dimension (L × W × H) | m | 5.70 × 1.97 × 3.60 | 5.76 × 4.10 × 3.70 | 8.00 × 3.60 × 4.70 | 7.87 × 3.40 × 3.40 | 8.90 × 3.90 × 4.00 | 8.90 × 3.90 × 4.00 | 10.50 × 4.12 × 4.15 | 10.50 × 4.30 × 4.23 | |
