The Low Nitrogen Gas Hot Water Boiler is a commercial-grade, fire-tube thermal system engineered for continuous heating across industrial plants, district heating networks, and large commercial facilities. Built on a three-pass wet-back structural foundation, it balances combustion efficiency with reduced gas consumption, delivering reliable hot water supply under dynamic load conditions.
Parameter
|
Model |
Rated thermal power(MW) |
Rated Working Pressure (MPa) |
Inlet/outlet water temperature (℃) |
Thermal Efficiency(%) |
Natural gas consumption(m³) |
Shipping Weight(t) |
|
WNS0.7-1.0/95/70-Q |
0.7 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
75.3 |
5.3 |
|
WNS1.4-1.0/95/70-Q |
1.4 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
153.7 |
6.8 |
|
WNS2.1-1.0/95/70-Q |
2.1 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
230.1 |
8.9 |
|
WNS2.8-1.0/95/70-Q |
2.8 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
306.2 |
10.3 |
|
WNS4.2-1.0/95/70-Q |
4.2 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
459.3 |
12.2 |
|
WNS5.6-1.0/95/70-Q |
5.6 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
612.1 |
18 |
|
WNS7.0-1.0/95/70-Q |
7 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
763.8 |
21.1 |
|
WNS10.5-1.0/95/70-Q |
10.5 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
1170.1 |
29.5 |
|
WNS14-1.0/95/70-Q |
14 |
1.0/1.25/1.6 |
95/70,115/70,130/70 |
>96 |
1500.6 |
37.2 |
Product Features
High Heat Transfer Efficiency: Corrugated furnace paired with threaded smoke tubes increases radiation area and gas turbulence, lowering exhaust gas temperatures prior to economizer entry.
Elimination of Rear Wall Maintenance: Water-cooled wet-back turnaround chamber replaces refractory baffles, avoiding refractory degradation and localized thermal stress on the rear tube sheet.
Controlled Excess Air Levels: Closed-loop oxygen trim automatically adjusts air-fuel mixing, maintaining flue gas excess oxygen between 3% and 5% across changing burner load profiles.
Thermal Stress Resistance: Strength-welded and mechanically expanded tube-to-tubesheet joints absorb thermal expansion without joint loosening during dynamic temperature cycling.
Certified Structural Integrity: Shell and furnace pressure seams are joined via automated submerged-arc welding (SAW) and verified by 100% radiographic non-destructive testing (RT).
Compatible Energy Sources & Configurations
Primary Fuel Supply: Natural Gas, Liquefied Natural Gas (LNG), Liquefied Petroleum Gas (LPG), Municipal Pipeline Gas.
Backup Fuel Integration: Light Diesel capability or dual-fuel (Gas/Oil) burner systems for uninterrupted heating during primary gas outages.
Thermal Heat Recovery: Optional stainless steel condensing economizers to capture latent flue gas heat.
Drive & Circulation: Variable Frequency Drive (VFD) controls for feed water and draft pumps to minimize auxiliary electrical consumption.
Customization Services
Heating capacity from 0.7 MW to 14 MW
Working pressure up to 1.0 MPa, 1.25 MPa, 1.6 MPa, or custom
Burner options including Riello, Baltur, Weishaupt, or equivalent brands
PLC and HMI systems from Siemens, Schneider, or Omron
220V / 380V / 400V / 415V, 50 Hz or 60 Hz
Optional condensing economizer
Dual-fuel (Gas/Oil) configuration
Outdoor, anti-corrosion, or explosion-proof versions
Applications
Suitable for:
Industrial process heating
District heating systems
Hospitals
Hotels
Commercial complexes
Food processing plants
Textile factories
Chemical plants
Pharmaceutical facilities
Boiler room retrofit projects
Manufacturing & Quality Assurance
- Automated submerged arc welding for pressure components
- 100% radiographic inspection of pressure welds
- Hydrostatic pressure testing before shipment
- Burner and control system functional testing
- Factory pre-assembly to reduce onsite installation time
Our Strength
Manufacturing Scale: 160-acre facility with 69,000 m² production workshops and over 300 precision processing units.
Compliance & Licensing: Holds ASME, CE certifications, and Class A2 pressure vessel manufacturing licenses.
Global Footprint: Equipment installed in 70+ countries with regional service branches in Vietnam and Indonesia.
FAQ
Q: How do I choose the right boiler capacity for my project?
A: Boiler capacity depends on the required heating load, outlet water temperature, return water temperature, and operating conditions. Our engineering team can recommend the appropriate model based on your project parameters.
Q: Can this boiler replace an existing steam or hot water boiler?
A: Yes. The boiler can be configured to match existing piping connections, operating pressure, burner requirements, and control systems, making it suitable for many boiler replacement and energy upgrade projects.
Q: What information should I provide before requesting a quotation?
A: To prepare an accurate quotation, we recommend providing:
Required heating capacity
Fuel type
Working pressure
Outlet/return water temperature
Local power supply
Installation location
Preferred burner brand (if applicable)
Q: How long does installation and commissioning usually take?
A: For standard packaged units, installation generally requires only utility connections and system commissioning. The exact schedule depends on site preparation, piping work, and local utility availability.
Q: What maintenance is required during normal operation?
A: Routine maintenance mainly includes burner inspection, water quality monitoring, safety device testing, and periodic cleaning of heat transfer surfaces. Preventive maintenance helps maintain efficiency and extend equipment life.
Q: What documents are available for international projects?
A: Depending on project requirements, we can provide ASME or CE documentation, pressure vessel certificates, factory inspection reports, material certificates, operation manuals, packing lists, and export documents.
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