ZOZEN is a steam boiler manufacturer in China.

Fire tube Gas-fired heating steam boile

Fire tube Gas-fired heating steam boile

Capacity:0.5-20 t/h

Pressure:0.7-2.5 Mpa

Fuel:Nature gas, coke oven gas, biogas, methanol, etc.

Temperature: 194-225°C

Applications: heat suppling, chemical, food, textile, printing and dyeing, cigarettes and tobacco, fodder, pharmacy, building materials, brewery, rubber, hospital etc.

Fire tube Gas-fired heating steam boile introduction

  WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere.

Fire tube Gas-fired heating steam boile parameters
Model WNS1-0.7-Y(Q)
WNS1.5-1.0-Y(Q) WNS1.5-1.25-Y(Q) WNS2-1.0-Y(Q) WNS2-1.25-Y(Q) WNS3-1.0-Y(Q)
Rated steam capacity(t/h) 1 1.5 2 3 4 5
Rated working pressure(Mpa) 0.7/1.0 1.0/1.25 1.0/1.25 1.0/1.25 1.25/1.6 1.25/1.6
Rated steam temperature(℃) 170/184 184/194 184/194 184/194 194/204 194/204
Feeding water temperature(℃) 20 20 20 20 20 20
Heating area(㎡) Body 24.06 27.33 58.15 89.99 112.59 163.1
Condenser 15.4 20.5 29.64 45.6 53.54 65.89
Thermal efficiency(%) >98 >98 >98 >98 >98 >98
Fuel  Nature gas, coke oven gas, biogas, methanol, light oil etc.
Combustion equipment burner
General power (KW) 3.6 4 .8 7.0 10.5 13 16.5
Feed pump model JGGC2-8×16 JGGC2-8×16 JGGC2.4-8×18 JGGC4-8×18 JGGC4.8-8×22 JGGC6-8×18
consumption Light oil 66 99 113 196 266 332
nature gas 72 108 144 216 288 360
Max part weight 4 4.5 8.5 8.9 13.3 14.3
Max dimension of delivery
3.25×1.8×2.1 3.0×1.8×2.01 4.4×2.1×2.46 4.6×2.31×2.62 4.7×2.48×2.85 5.33×2.65×3.3
Model WNS6-1.25-Y(Q)
Rated steam capacity(t/h) 6 8 10 15 20
Rated working pressure(Mpa) 1.25/1.6 1.25/1.6 1.25/1.6 1.25/1.6 1.25/1.6
Rated steam temperature(℃) 194/204 194/204 194/204 194/204 194/204
Feeding water temperature(℃) 20 20 20 20 20
Heating area(㎡) Body 181.17 190.77 229.95 346.2 467.6
Condenser 78.25 108.5 165.3 216.2 360.3
Thermal efficiency(%) >98 >98 >98 >98 >98
Fuel Nature gas, coke oven gas, biogas, methanol, light oil etc.
Combustion equipment burner
General Power(KW) 19.5 29.5 33 60 90.5
Feed pump model JGGC6-8×19 JGGC9-15×10 JGGC12.5-15×11 JGGC16-15×12 JGGC25-35×5
Fuel consumption Light oil 399 532 660 997 1204
nature gas 432 576 720 1080 1440
Max part weight(t) 19.5 22.6 25.8 34.7 46
Max dimension of delivery
5.93×2.6×3.02 5.85×2.8×3.1 7.65×2.81×3.1 6.95×3.1×3.6 8.3×3.4×4.02

Notice: As the company's products continue to improve parameters of the above products will be continuously updated page listed for reference only.


Fire tube Gas-fired heating steam boile advantage
Digitized manufacture
The key part such as material cutting, rolling, drilling are proceeded by advanced CNC machining process to reduce the assemble stress and extend boiler working lifetime.
● The front and back smoke chamber plates are cut by CNC plasma cutting machine and looks tidy and beautiful;
Easy operation and maintenance
Fully automatically operating, with automatically adjustment and protection of burning, water level, temperature and steam pressure
longer working life.
Smoke tube and tube sheet connection is expanded first to eliminate the gap between them, then adopt automatic argon arc welding to relief the stress and expand boilers working life.
Longitudinal and girth joint adopt advanced automatic submerged-arc welding for good welding quality. All longitudinal and girth joint will have 100% radiographic inspection.
Fin tube us ND steel or stainless-steel material which avoid low temperature corrosion.
  Inspection procedure point is set up to guarantee the sequence of expanding and welding, avoid cracking of the tube sheet holes
less fuel consumption
High quality aluminum silicate fiber is used with fire clay insulation, to control the boiler body temperature below 45℃ to control heat lost.
Sufficient steam storage room and heating area makes boiler to generate high quality steam and high thermal power
Condenser is added to reuse the waste heat of the exhausted smoke to increase feeding water’s temperature and reduce emission temperature, which can increase the thermal efficiency above 98% and save operating cost.

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