Steam Boiler
Boilers
Steam Boiler
Model: WNS Series
1. Product Overview
A steam boiler converts the chemical energy of fuel into thermal energy carried by steam, providing a stable and reliable heat source for industrial production. The WNS series horizontal, internally fired fire-tube boiler adopts a three-pass design: fuel is burned in a corrugated furnace, and the hot flue gas transfers its heat in sequence through threaded and plain smoke tubes before discharge, achieving a thermal efficiency of ≥95%. Fully automatic control ensures safe, reliable operation, and the boiler is widely used in the pharmaceutical, food, chemical and textile industries.
Key Features
- Capacity 0.5–20 t/h
- Pressure 0.7–2.5 MPa
- Efficiency ≥95% (condensing ≥98%)
- Fully automatic, unattended operation
- Gas/oil/dual fuel
- Low NOx ≤30mg/Nm³
2. Working Principle
Fire-tube Principle
Fuel burns in furnace, flue gas flows through furnace (1st pass) → threaded smoke tubes (2nd pass) → plain tubes (3rd pass), transferring heat to water. 3-pass design maximizes heat exchange.
Steam Generation
As the boiler water absorbs heat from the flue gas, its temperature rises to the saturation point and the water vaporizes into steam. After steam-water separation in the drum, the saturated steam is delivered to the user. Steam pressure is controlled by modulating the burner firing rate, while the steam temperature corresponds to the saturation temperature at the operating pressure.
3. System Classification
By Structure
1. Fire-tube (WNS)
2. Water-tube (SZS)
By Fuel
1. Natural gas
2. Diesel
3. Heavy oil
4. Dual fuel
4. Detailed Technical Parameters
Basic Parameters
| Parameter | Specification |
|---|---|
| Model | WNS-0.5/1/2/4/10/20 |
| Capacity | 0.5–20 t/h |
| Pressure | 0.7/1.0/1.25/1.6/2.5 MPa |
| Efficiency | ≥95% (condensing ≥98%) |
Parameters
| Model | Capacity (t/h) | Pressure (MPa) | Efficiency (%) | Gas consumption (Nm³/h) | Shipping weight (t) |
|---|---|---|---|---|---|
| WNS-0.5 | 0.5 | 1.0 | ≥95 | 40 | 5 |
| WNS-1 | 1 | 1.0 | ≥95 | 78 | 7 |
| WNS-2 | 2 | 1.0 | ≥95 | 155 | 12 |
| WNS-4 | 4 | 1.25 | ≥95 | 310 | 18 |
| WNS-10 | 10 | 1.25 | ≥95 | 770 | 35 |
| WNS-20 | 20 | 1.25 | ≥95 | 1540 | 60 |
5. Core Component Selection
Boiler Body
Q345R steel, 3-pass fire-tube. Corrugated furnace + threaded tubes.
Burner
Baltur/Weishaupt/Riello, modulating, auto ignition, low NOx ≤30mg/Nm³.
Control System
PLC+HMI, auto combustion/water level/pressure. Multi-level safety protection.
Feed Pump
Multistage centrifugal, SS material, VFD optional.
Economizer/Condenser
An economizer in the rear flue duct recovers residual heat from the flue gas; the condensing type further recovers latent heat, raising thermal efficiency to ≥98%.
6. Typical Application Fields
Pharmaceutical
Process steam for sterilization, drying and heating
Food
Cooking, sterilization, drying
Chemical
Reaction heating, distillation
Textile
Setting, dyeing
7. Design Standards & Certifications
Designed and certified to the following standards
1. GB/T 16508-2013 Shell boilers
2. TSG 11-2020 Boiler safety technical regulations
3. ISO 9001/14001
4. CE Certification
5. ASME (optional)
8. Custom Optional Configurations
| Option | Details |
|---|---|
| Capacity | 0.5–20 t/h |
| Pressure | 0.7–2.5 MPa |
| Fuel | Gas/Oil/Dual |
| Efficiency | Standard/Condensing |
9. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| New | 12 months | Boiler body, burner, controls |
| Refurbished | 6 months | Controls |
10. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Boiler body | Bare or containerized transport |
| Burner & electrical | Individual sealed packaging |
| Documentation | Sealed in waterproof bag |
Lead time: 30–90 working days for new equipment.
11. Information Required for Inquiry
Please provide:
Capacity (t/h)
Pressure (MPa)
Fuel type
Application
Condensing needed
Control preference
Voltage/frequency
Installation conditions
New/Refurbished
Delivery terms