Product Introduction
The WNS series oil/gas‑fired hot water boiler adopts a horizontal internal‑combustion, wet‑back,three‑pass structure. It is delivered as a complete packaged unit for easy installation and reduced on‑site workload. Equipped with a PLC full‑automatic control system, it supports unattended operation.
Designed with full corrugated furnace and threaded flue tubes, the boiler creates a three‑pass heat transfer path: flue gas passes through the furnace (radiant heat transfer), reversal chamber and threaded flue tube bundle (convective heat transfer), effectively enlarging the heating surface area. Combined with a large‑volume furnace, tail‑end economizer and condenser, flue‑gas temperature can drop as low as 60 ℃ and thermal efficiency reaches over 95%.
Supported by ultra‑low‑NOₓ combustion technology, nitrogen‑oxide emissions are controlled below 30 mg/Nm³ to satisfy strict environmental‑protection requirements. The hinged smoke‑box door enables easy opening for inspection and lowers maintenance difficulty.
DZL Biomass-fired Horizontal Steam Boiler Flowchart

Main Performance Advantages 01
Main Performance Advantages 02
Product Parameters
| Rated Working Pressure (MPa) | Rated Outlet Water Temperature (°C) | Rated Inlet Water Temperature (°C) | Thermal Efficiency (%) | Maximum Transportation Weight (t) | Maximum Transportation Dimensions (L×W×H, m) |
| 0.70 | 95 | 70 | >95 | 4 | 3.25×1.80×2.10 |
| 0.70 | 95 | 70 | >95 | 8.3 | 4.40×2.16×2.52 |
| 0.70 | 95 | 70 | >95 | 8.9 | 4.70×2.40×2.75 |
| 0.70 | 95 | 70 | >95 | 13.3 | 4.95×2.55×2.95 |
| 0.70 | 95 | 70 | >95 | 14.3 | 5.35×2.65×3.30 |
| 1.00 | 115 | 70 | >95 | 19.5 | 5.95×2.75×3.15 |
| 1.00 | 115 | 70 | >95 | 22.6 | 7.05×2.80×3.25 |
| 1.00 | 115 | 70 | >95 | 25.8 | 7.05×2.80×3.25 |
| 1.00 | 115 | 70 | >95 | 33 | 7.90×3.45×3.70 |
| 1.00 | 115 | 70 | >95 | 46 | 8.00×3.75×3.95 |
The above data is for reference only. Please refer to the actual product and product manual for specific information. Unless otherwise specified, the right of interpretation for all data contained on this website belongs to our company.
If you require detailed information about other models, please contact us.




