Low NOx Gas Fired Hot water Boiler for Central Heating

Low NOx Gas Fired Hot water Boiler for Central Heating

Thermal Power Range: 0.7~17.5MW/h
Fuel Options: Natural Gas, LPG, LNG, Biogas, Diesel, Heavy Oil, Dual Fuel , Propane , #2 Fuel Oil
Hot Water Temperature Outlet/Inlet: 95/70℃, 115/70℃, 130/70℃
Key Features:

Highly Integrated economizer&condenser&air preheater, minimize boiler footprint.

Both combustion and water feeding VFD control, save electricity up to 30%.

Split-type VFD fan, accurate air volume and pressure control, fuel burnout rate 99%, save fuel cost.

Unique air cooled smoke box design without refractory cement, Lifelong maintenance-free, saving maintenance costs

Bottom water return design and backwater circulation technology prevent tube sheet cracking

Advantage

  • Description:

    Ultra-low NOX condensing pressurized hot water boiler is a two-pass fire tube boiler with wetback, high efficiency, and low stress. It is integrated with high-efficiency air preheater and economizer& condenser. An arc-shaped double-open furnace door for easy maintenance, air-cooled smoke box , and uses a large furnace for full-mixed combustion and high-efficiency threaded smoke tube heat transfer; it is the first to use low-nitrogen coupling and has a unique low-nitrogen combustion technology in the furnace to comprehensively suppress the production of nitrogen oxides (NOx); Equipped with ABB inverters, split low-nitrogen burners, 7/10-inch LCD touch screens and high-performance PLC programmable controllers, which fully meet the boiler's ultra-low NOx emission standards.

Working Principle

  • Flue gas flow chart
  • Heating System Diagram
  • Heating System Diagram
Flue gas flow chart
Heating System Diagram
Heating System Diagram

Parameters

Model

Rated thermal power(MW/H)

Rated outlet water
pressure(MPA)

Rated Outlet/inlet Water
Temperature(℃)

Heat Efficiency(%)

Nox Emission(mg/m³)

Transportation Weight(ton)

Transportation
Dimension(mm)

NWNS0.7-1.0/95/70-Q

0.7

1.0

95/70

≥97

≤80/30

5.5

3550*2200*3100

NWNS1.4-1.0/95/70-Q

1.4

1.0

95/70

≥97

≤80/30

7.3

4450*2350*3200

NWNS2.1-1.0/95/70-Q

2.1

1.0

95/70

≥97

≤80/30

9.5

5000*2450*3300

NWNS2.8-1.0/95/70-Q

2.8

1.0

95/70

≥97

≤80/30

12.8

5400*2550*3400

NWNS3.5-1.0/95/70-Q

3.5

1.0

95/70

≥97

≤80/30

13.9

5950*2750*3500

NWNS4.2-1.0/95/70-Q

4.2

1.0

95/70

≥97

≤80/30

14.9

6000*2850*3600

NWNS5.6-1.0/95/70-Q

5.6

1.0

95/70

≥97

≤80/30

19.5

6600*3050*3800

NWNS7.0-1.0/95/70-Q

7.0

1.0

95/70

≥97

≤80/30

24.1

7100*2950*3100

NWNS10.5-1.0/115/70-Q

10.5

1.0

115/70

≥97

≤80/30

35.9

7850*3250*3450

NWNS14-1.0/115/70-Q

14

1.0

115/70

≥97

≤80/30

42.6

8650*3450*3650

NWNS17.5-1.0/115/70-Q

17.5

1.0

115/70

≥97

≤80/30

54.4

9400*3650*3900

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