Product Overview
The SZS Series Industrial Gas/Oil-Fired Water-Tube Hot Water Boiler is designed for large-scale industrial and commercial heating applications. Featuring a double-drum, longitudinal D-type structure and membrane water walls, it delivers efficient heat transfer and stable thermal output. Combined with an advanced automatic combustion system, optional flue gas recirculation (FGR), and energy-saving heat recovery technology, the boiler achieves thermal efficiency of up to 98% while helping reduce fuel consumption and NOx emissions. Its robust construction, comprehensive safety protections, and factory-integrated assembly support reliable operation, convenient maintenance, and efficient project installation.
Product Structure Drawing
Key Advantages
An oversized combustion chamber, optimized heat-transfer surfaces, and a spiral fin-tube condenser improve combustion and exhaust heat recovery, achieving thermal efficiency of up to 98%.
Advanced FGR and staged combustion technologies help control NOx emissions to ≤ 30 mg/Nm³, subject to the specified configuration and operating conditions.
The double-drum D-type layout and membrane water walls enhance furnace sealing, maximize radiant heat absorption, and reduce refractory maintenance.
Ample heat-transfer surfaces, large water capacity, and bottom sliding supports help maintain stable heating performance and accommodate thermal expansion.
Integrated interlocks monitor abnormal water levels, flameout, and overpressure. A roof-mounted explosion-proof door provides pressure relief in abnormal furnace conditions.
The factory-integrated structure simplifies transportation and on-site assembly, helping shorten installation time and reduce project construction costs.
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 | Specification |
| Boiler Series | SZS |
| Boiler Type | Industrial Gas/Oil-Fired Water-Tube Hot Water Boiler |
| Rated Heating Capacity | 7.0–70 MW |
| Thermal Efficiency | ≥ 98% |
| Design Service Life | > 20 Years |
| Applicable Fuel | Natural Gas, LPG, Diesel, Heavy Oil |
| Boiler Structure | Double-Drum, Longitudinal D-Type |
| Furnace Wall Structure | Membrane Water Walls |
| Combustion Control | Fully Automatic |
| Emission Control | FGR and Staged Combustion (specified configuration) |
| Heat Recovery | Spiral Fin-Tube Condenser (specified configuration) |
| Safety Protection | Automatic Safety Interlocks and Explosion-Proof Door |
