
Front and rear smoke boxes: The front and rear smoke boxes can be moved for easy maintenance and repair. The outer door panels of the smoke boxes are insulated with air to reduce the touch temperature of the panels.
Wet back combustion chamber: 100% water-wrapped fire structure design to improve boiler efficiency.
Corrugated furnace: Increase the heating area and have good thermal elasticity to alleviate the damage to the combustion chamber caused by thermal expansion and contraction; the large-volume furnace is conducive to full combustion, fuel saving, and achieving low-nitrogen goals.
Threaded smoke pipe: Enhance heat exchange efficiency and improve boiler efficiency.
Energy saver: It adopts an integrated fin tube structure to fully absorb the sensible heat in the flue gas, effectively reduce the flue gas temperature and improve the thermal efficiency of the boiler.
Insulation structure: 100mm double-layer high bulk density insulation structure is adopted to reduce the external touch temperature of the boiler to room temperature, which not only increases safety but also greatly improves the thermal efficiency of the boiler.
9. Condenser: Corrosion-resistant ND steel finned tubes are adopted to fully recover the latent heat of vaporization released during the condensation of water vapor, further reduce the smoke temperature and improve the thermal efficiency of the boiler.

Horizontal gas three-pass steam boiler (120 mg) parameter table | ||||||||||||||
Modal | Unit | WNS0.5-1.0-Q.Y | WNS0.5-1.25-Q.Y | WNS0.75-0.7-Q.Y | WNS1.0-0.7-Q.Y | WNS1.0-1.0-Q.Y | WNS1.0-1.25-Q.Y | WNS1.5-1.0-Q.Y | WNS2.0-1.0-Q.Y | WNS2.0-1.25-Q.Y | WNS2.0-1.6-Q.Y | WNS3.0-1.0-Q.Y | WNS3.0-1.25-Q.Y | |
Rated evaporation capacity | KG/H | 500 | 500 | 750 | 1000 | 1000 | 1000 | 1500 | 2000 | 2000 | 2000 | 3000 | 3000 | |
Rated Power | MW | 0.35 | 0.35 | 0.53 | 0.7 | 0.7 | 0.7 | 1.05 | 1.4 | 1.4 | 1.4 | 2.1 | 2.1 | |
Rated working pressure | Mpa | 1 | 1.25 | 0.7 | 0.7 | 1.0 | 1.25 | 1.0 | 1.0 | 1.25 | 1.6 | 1.00 | 1.25 | |
Saturated steam temperature | ºC | 170 | 184 | 170 | 170 | 184 | 193 | 184 | 184 | 193 | 204 | 184 | 193 | |
Thermal efficiency | % | ≥94 | ||||||||||||
Heating area | boiler | M² | 14.99 | 14.99 | 17.55 | 20.42 | 20.35 | 20.35 | 33.14 | 45.1 | 45.5 | 45.3 | 68.4 | 72.44 |
Energy Saver | M² | 9.26 | 9.26 | 15.49 | 15.49 | 15.49 | 15.49 | 21.62 | 20.84 | 21.5 | 26.1 | 30.4 | 30.46 | |
Boiler water capacity | M³ | 1.05 | 1.05 | 2.22 | 2.5 | 2.5 | 2.5 | 3.96 | 5 | 5 | 5 | 6.59 | 7.1 | |
Flue size | mm | 400*200 | 400*200 | 400*200 | 400*200 | 400*200 | 400*200 | 400*200 | 460*300 | 460*300 | φ420 | 580*400 | 580*400 | |
Water supply diameter | DN | 25 | 25 | 40 | 40 | 25 | 25 | 25 | 40 | 40 | 40 | 50 | 50 | |
Main (auxiliary) steam valve diameter | DN | 50/25 | 50/25 | 65/25 | 65/25 | 65/25 | 65/25 | 65/40 | 80/40 | 80/40 | 80/40 | 100/40 | 100/40 | |
Safety valve diameter | DN | 40 | 40 | 2*DN40 | DN50 | DN50 | DN50 | 2*DN40 | 2*DN40 | 2*DN40 | 2*DN40 | 2*DN40 | 2*DN40 | |
Drain valve diameter | DN | 25 | 25 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | |
Fuel consumption | 0# Light diesel | kg/h | 33.8 | 33.8 | 50.7 | 67.2 | 67.8 | 67.8 | 102.2 | 132.6 | 133.7 | 137.7 | 203.1 | 204 |
Natural gas | Nm³/h | 40.7 | 40.7 | 60.9 | 81.1 | 81.3 | 81.4 | 120.1 | 161 | 161.8 | 158.3 | 239.1 | 243.9 | |
Shipping Weight | KG | 3100 | 3100 | 3100 | 4000 | 4300 | 4500 | 4800 | 7000 | 7000 | 7400 | 8000 | 10000 | |
Dimensions | Length | mm | 2900 | 2900 | 2900 | 3100 | 3100 | 3100 | 3750 | 3850 | 3850 | 3800 | 4600 | 4600 |
Width | mm | 1650 | 1650 | 1700 | 1700 | 1700 | 1700 | 1950 | 2100 | 2100 | 2100 | 2200 | 2200 | |
Height | mm | 1880 | 1880 | 2000 | 2000 | 2000 | 2000 | 2250 | 2350 | 2350 | 2400 | 2500 | 2550 | |
Modal | Unit | WNS4.0-1.0-Q.Y | WNS4.0-1.25-Q.Y | WNS4.0-1.6-Q.Y | WNS5.0-1.25-Q.Y | WNS5.0-1.6-Q.Y | WNS6.0-1.0-Q.Y | WNS6.0-1.25-Q.Y | WNS8.0-1.25-Q.Y | WNS8.0-1.6-Q.Y | WNS10.0-1.25-Q.Y | WNS15.0-1.25-Q.Y | WNS20.0-1.25-Q.Y | |
Rated evaporation capacity | T/H | 4.0 | 4.0 | 4.0 | 5.0 | 5.0 | 6.0 | 6.0 | 8.0 | 8.0 | 10.0 | 15.0 | 20.0 | |
Rated Power | MW | 2.8 | 2.8 | 2.8 | 3.5 | 3.5 | 4.2 | 4.2 | 5.6 | 5.6 | 7.0 | 10.5 | 14.0 | |
Rated working pressure | Mpa | 1.0 | 1.25 | 1.6 | 1.25 | 1.25 | 1.25 | 1.25 | 1.6 | 1.25 | 1.25 | 1.25 | 1.25 | |
Saturated steam temperature | ºC | 184 | 193 | 204 | 193 | 204 | 184 | 193 | 193 | 204 | 193 | 193 | 193 | |
Thermal efficiency | % | ≥94 | ||||||||||||
Heating area | boiler | M² | 80.27 | 84.83 | 84.3 | 110.5 | 110.5 | 139.8 | 142.1 | 190.2 | 191.8 | 142.3 | 212.7 | 252.5 |
Energy Saver | M² | 43.41 | 30.36 | 35.2 | 46.5 | 46.5 | 57.1 | 40.9 | 80.5 | 74.4 | 112.6 | 170.2 | 206.0 | |
Boiler water capacity | M³ | 7.54 | 7.6 | 7.6 | 8.9 | 8.9 | 8.5 | 11 | 13.9 | 13.9 | 19.5 | 24.5 | 26.8 | |
Flue size | mm | 580*400 | 580*400 | 580*400 | 680*400 | 680*400 | 720*400 | 720*400 | 940*520 | 940*520 | 850*500 | 990*500 | 900*500 | |
Water supply diameter | DN | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | |
Main (auxiliary) steam valve diameter | DN | 100/40 | 100/40 | 100/40 | 125/40 | 125/40 | 125/40 | 125/40 | 150/40 | 150/40 | 150/40 | 200/65 | 200/65 | |
Safety valve diameter | DN | 2*DN50 | 50/40 | 50/40 | 2*DN50 | 2*DN50 | 2*DN65 | 2*DN65 | 2*DN65 | 2*DN65 | 2*DN80 | 100/80 | 2*DN100 | |
Drain valve diameter | DN | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 2*DN50 | 2*DN50 | 2*DN50 | |
Drain valve diameter | 0# Light diesel | kg/h | 266.3 | 269.8 | 270.1 | 335.4 | 335.4 | 409.36 | 401.9 | 624.5 | 548.2 | 664.9 | 954.5 | 1247.7 |
Natural gas | Nm³/h | 320.4 | 324.3 | 321.2 | 395.2 | 395.2 | 481.86 | 488.5 | 548.5 | 624.4 | 788.5 | 1142.2 | 1516.2 | |
Shipping Weight | KG | 8300 | 9300 | 9850 | 11200 | 12250 | 12500 | 13800 | 18000 | 19200 | 22000 | 26000 | 30000 | |
Dimensions | Length | mm | 4900 | 4900 | 4950 | 5250 | 5250 | 5850 | 5800 | 6600 | 6500 | 6240 | 7580 | 7800 |
Width | mm | 2300 | 2200 | 2300 | 2350 | 2350 | 2400 | 2500 | 2600 | 2600 | 2850 | 3270 | 3465 | |
Height | mm | 2650 | 2660 | 2650 | 2680 | 2680 | 2700 | 2850 | 3050 | 2850 | 3100 | 3470 | 3680 |





