WNS Series Horizontal Internal Combustion Boiler

CE Certified ISO 9001 A-Class License

Contents Hide 1 High-Efficiency Three-Pass Wet-Back WNS series horizontal steam boiler Gas & Oil Boiler 2 ⭐ Key Advantages of WNS series horizontal steam boiler 2.1 ✔ 1. High Thermal Efficiency (Up to 98%) 2.2 ✔ 2. Fully Automatic Intelligent Control 2.3 ✔ 3. Ultra-Low Emission & Environment Friendly 2.4 ✔ 4. Long Service Life […]

Technical Specifications

High-Efficiency Three-Pass Wet-Back WNS series horizontal steam boiler Gas & Oil Boiler

The WNS series horizontal internal combustion boiler is a high-performance, fully automatic three-pass wet-back boiler designed with cutting-edge global technology. It is known for its excellent combustion efficiency, low operating costs, and superior safety standards. With a durable structure and innovative heat-transfer design, the WNS series is widely recognized as one of the most reliable industrial boilers for steam and hot water generation.

WNS Series Horizontal steam Boiler Low NOx Gas Fired Boiler ROI WNS oil gas steam boiler

⭐ Key Advantages of WNS series horizontal steam boiler

✔ 1. High Thermal Efficiency (Up to 98%)

The three-pass wet-back structure significantly enhances radiant and convective heat transfer, maximizing fuel utilization and reducing heat loss.

✔ 2. Fully Automatic Intelligent Control

The PLC-based control system ensures easy operation, automatic start/stop, water level control, and comprehensive safety protection.

✔ 3. Ultra-Low Emission & Environment Friendly

Optimized combustion and advanced burner technology ensure low NOx emissions and compliance with global environmental standards.

✔ 4. Long Service Life & High Reliability

The wet-back design reduces furnace wall erosion and thermal stress, ensuring long-term durability and reduced maintenance costs.

✔ 5. Lower Fuel Consumption & Reduced Operating Cost

Optimized airflow design, efficient heat-transfer tubes, and complete combustion reduce overall energy consumption.

✔ 6. Easy Installation & Maintenance

Compact boiler body, modular accessories, and front-rear manholes significantly simplify installation and routine inspection.


⭐ Working Principle: Three-Pass Wet-Back Design

(1) First Pass – Wave Furnace (Radiant Heating)

Fuel is fully atomized by the high-efficiency burner and forms a strong flame inside the large wave furnace. Radiant heat is absorbed efficiently, ensuring complete combustion.

(2) Second Pass – Reversal Chamber + Threaded Flue Tubes

High-temperature flue gas flows through the rear reversal chamber and enters the threaded flue tubes, creating strong turbulence and improving heat-transfer efficiency.

(3) Third Pass – Front Smoke Chamber + Plain Tube Bundle

After heat exchange in the second pass, gases enter the third-pass plain tubes for further cooling before being discharged through the chimney.


⭐ Technical Features of WNS series horizontal steam boiler

  • Three-pass wet-back design
  • High-efficiency burner (Gas/Diesel/Heavy Oil)
  • Large furnace volume to reduce NOx
  • Threaded flue tubes for strong heat transfer
  • High-standard steel plate and advanced welding technology
  • Automatic water supply and pressure protection system
  • Equipped with international brand valves and pumps

⭐ Technical Specifications of WNS series horizontal steam boiler

  • Steam capacity: 0.5 – 20 t/h
  • Working pressure: 0.7 – 2.5 MPa
  • Thermal efficiency: up to 98%
  • Fuel type: Natural gas / LPG / Diesel / Heavy oil
  • Structure: Horizontal, internal combustion, wet back, 3-pass

⭐ Applications of WNS series horizontal steam boiler

The WNS series boiler is widely used in:

  • Food & Beverage Processing
  • Textile & Garment
  • Chemical & Pharmaceutical
  • Paper Industry
  • Rubber & Plastics
  • Hotel & Hospital Heating
  • Packaging & Printing
  • Building Materials
  • General Industrial Heating

⭐ Why Choose Our WNS Boiler?

Our WNS series boilers have passed rigorous thermal efficiency testing and environmental performance testing conducted by well-known national boiler research institutes. All performance indicators are fully in line with national and international standards.
The product is widely praised for its advanced technology, stable performance, and energy-saving properties.

⭐FAQ

Q1: What is a WNS series boiler?

A WNS boiler is a horizontal, internal combustion, three-pass wet-back boiler widely used for industrial steam production.

Q2: What fuels can the WNS boiler use?

It supports natural gas, LNG, diesel, light oil, and heavy oil.

Q3: What is the efficiency of the WNS boiler?

Thermal efficiency can reach up to 98% with an advanced burner and optimized design.

Q4: Which industries commonly use the WNS boiler?

Food processing, textile, chemical, pharmaceutical, heating supply, and more.

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