The Condensing Low-Nitrogen Gas Steam Boiler is a high-efficiency fire-tube steam boiler designed for industrial facilities requiring stable steam supply, reduced fuel consumption, and compliance with low-emission regulations. By combining condensing heat recovery with low-NOx combustion technology, it delivers saturated steam with thermal efficiency up to 103.9%.
Product Features
Sensible & Latent Heat Recovery The integrated condensing economizer reduces flue gas exhaust temperatures to 60–80°C, recovering sensible heat and latent heat from flue gas moisture to achieve thermal efficiency up to 103.9%.
Low-NOx Combustion System Combines staged combustion burners with Flue Gas Recirculation (FGR) to regulate flame temperatures and lower nitrogen oxide emissions in compliance with local environmental standards.
Wet-Back Three-Pass Thermal Design The submerged rear turnaround chamber eliminates tube-sheet expansion strain caused by direct flame impact, reducing thermal fatigue on pressure parts while increasing thermal transfer surface area.
Automated Process & Safety Controls The PLC-based system handles automatic ignition, continuous water level control, operating pressure regulation, flame safety interlocks, and emergency shutdown sequence.
Pre-Assembled Modular Package Burner, internal piping, control cabinet, and safety valves are mounted and tested prior to shipment to reduce site installation time and field welding requirements.
Parameter
|
Model |
Rated evaporation rate(t/h) |
Rated Working Pressure (MPa) |
Saturated SteamTemperature(℃) |
Thermal Efficiency (%) |
Natural gas consumption(m³) |
Shipping Weight(t) |
|
NWNS1-1.0-Q |
1 |
1.0/1.25/1.6 |
184/194/204 |
103.2 |
76.5 |
5.9 |
|
NWNS1.5-1.0-Q |
1.5 |
1.0/1.25/1.6 |
184/194/204 |
103.6 |
116.1 |
6.7 |
|
NWNS2-1.0-Q |
2 |
1.0/1.25/1.6 |
184/194/204 |
103.7 |
152.8 |
7.3 |
|
NWNS3-1.25-Q |
3 |
1.0/1.25/1.6 |
184/194/204 |
103.3 |
228.3 |
10.5 |
|
NWNS4-1.25-Q |
4 |
1.0/1.25/1.6 |
184/194/204 |
103.9 |
306.1 |
12.9 |
|
NWNS6-1.25-Q |
6 |
1.0/1.25/1.6 |
184/194/204 |
103.1 |
459.7 |
15.8 |
|
NWNS8-1.25-Q |
8 |
1.0/1.25/1.6 |
184/194/204 |
103.1 |
612 |
19.9 |
|
NWNS10-1.25-Q |
10 |
1.0/1.25/1.6 |
184/194/204 |
101.6 |
768.7 |
23.7 |
|
NWNS15-1.25-Q |
15 |
1.0/1.25/1.6 |
184/194/204 |
101.9 |
1149.8 |
33.8 |
|
NWNS20-1.25-Q |
20 |
1.0/1.25/1.6 |
184/194/204 |
101.7 |
1541.9 |
42.5 |
Typical Applications
Food & Beverage Processing
Pharmaceutical Manufacturing
Chemical Processing Plants
Textile Dyeing & Finishing
Paper & Pulp Production
Rubber & Plastics Vulcanization
Centralized District Heating
Hospitals & Commercial Laundries
Electronics & Precision Manufacturing
Customization & Engineering Options
|
Project Requirement |
Available Options |
|
Boiler Capacity & Steam Pressure |
Steam output customization, design pressure up to 2.5 MPa, optional superheated steam configuration |
|
Fuel Configuration |
Natural Gas, LPG, Biogas, Dual-Fuel (Gas/Oil), customized gas train design |
|
Control System |
Siemens, Schneider, Allen-Bradley, Mitsubishi PLC, multilingual HMI, remote monitoring, DCS/SCADA integration |
|
Installation Layout |
Packaged boiler, skid-mounted system, containerized boiler plant, retrofit solutions for existing boiler rooms |
|
Electrical Configuration |
220V–600V, 50/60Hz, customized control voltage |
|
Piping Standards |
ANSI, DIN, BS, JIS flange standards and customized piping connections |
|
Auxiliary Equipment |
Feedwater tank, RO water treatment, water softener, deaerator, blowdown system, economizer, dual feedwater pumps |
|
Engineering Documentation |
P&ID, General Arrangement Drawing, Foundation Drawing, Electrical Schematics, 2D/3D CAD & BIM models |
Manufacturing, Quality & Compliance
Every pressure vessel undergoes strict quality verification protocols prior to factory release:
Material Verification: Raw steel chemical analysis and mill test report (MTR) inspection.
Weld Inspection: 100% Non-Destructive Testing (NDT / X-Ray) on pressure parts.
Pressure Testing: Factory hydrostatic testing beyond rated design working pressure.
Functional Commissioning: Burner firing test, safety valve lift tests, and PLC logic validation.
Commercial Terms
|
Field |
Details |
|
MOQ |
1 Set |
|
Supply Capability |
Engineered-to-Order / Batch Production |
|
Operating Voltage |
220V / 380V / 400V / 415V / 440V / 480V / 600V (50/60Hz, Customizable) |
|
Warranty |
12 Months from commissioning or dispatch |
|
Technical Support |
Remote engineering assistance & technical documentation |
|
Installation Support |
On-site engineer supervision or remote installation guidance |
|
Payment Terms |
T/T, L/C at sight |
FAQ
Q: How do I determine whether a condensing steam boiler is suitable for my project?
A: Condensing boilers provide the greatest energy savings in facilities with continuous steam demand, high annual operating hours, and rising fuel costs. Our engineers can evaluate your operating conditions and estimate the potential efficiency improvement compared with conventional boilers.
Q: Can this boiler replace my existing steam boiler without major modifications?
A: Yes. The boiler can be engineered for retrofit projects by matching the existing steam pressure, fuel supply, chimney system, utility connections, and available boiler room space, helping reduce installation complexity.
Q: What auxiliary equipment is recommended for a complete steam boiler system?
A: A typical system may include a feedwater tank, water treatment unit, economizer, blowdown system, condensate recovery equipment, and deaerator. The final configuration depends on your steam demand and water quality.
Q: What information should I provide for boiler selection?
A: To recommend the appropriate model, we typically require steam capacity, working pressure, fuel type, local gas pressure, feedwater conditions, operating altitude, electrical supply, and installation space.
Q: What documents are supplied with the boiler?
A: The standard documentation package includes General Arrangement drawings, P&ID, electrical schematics, operation and maintenance manuals, inspection reports, pressure test records, packing lists, and other project documents required for installation and commissioning.
Q: What is included in the standard supply scope?
A: The standard package includes the boiler body, burner, control cabinet, safety valves, instrumentation, and factory-tested piping assemblies. Optional auxiliary equipment can be supplied as a complete boiler house package.
Q: How can long-term operating efficiency be maintained?
A: Maintaining proper feedwater quality, regularly cleaning heat transfer surfaces, inspecting combustion performance, and performing scheduled preventive maintenance help maximize efficiency, reduce fuel consumption, and extend equipment service life.
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