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WNS series gas-fired (oil-fired) hot water boiler

Product introduction

WNS series horizontal internal combustion boiler is classic 3-pass wetback oil/gas fired boiler. After fuel is atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, called 1st pass; the high temperature flue gasses are collected in reversal chamber and then enter 2nd pass, which is grooved tube bundle area through heat convection, air temperature gradually falls and flows to front smoke box and enter 3rd pass, which is done in the smooth tube bundle area, and then through back smoke box lead to chimney and exhausted to the atmosphere.


Product thermal capacity : 0.35-14 MW

Working pressure : 0.7-1.25 Mpa

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 service life

The way to weld Smoke tube and tube sheet is to first expand to eliminate the gap between them, then adopt automatic argon arc welding to relief the stress and expand boiler service life.
Longitudinal and girth joint adopt advanced automatic submerged-arc welding for good welding quality. All longitudinal and girth joint are test by radiographic inspection.
Fin tube uses ND steel or stainless-steel material to avoid corrosion in the low temperature .
Inspection stops are set up to guarantee the sequence of expanding and welding to avoid cracking of the tube sheet holes

SPECIFICATIONS

Model Rated thermal power(MW) Rated working pressure(Mpa) Rated output water temperature(℃) Rated feeding water temperature(℃)
WNS0.7-0.7/95/70- Y(Q) 0.7 0.7 95 70
WNS1.4-0.7/95/70- Y(Q) 1.4 0.7 95 70
WNS2.1-0.7/95/70- Y(Q) 2.1 0.7 95 70
WNS2.8-0.7/95/70- Y(Q) 2.8 0.7 95 70
WNS3.5-0.7/95/70- Y(Q) 3.5 0.7 95 70
WNS4.2-1.0/115/70- Y(Q) 4.2 1.0 115 70
WNS5.6-1.0/115/70- Y(Q) 5.6 1.0 115 70
WNS7-1.0/115/70- Y(Q) 7 1.0 115 70
WNS10.5-1.0/115/70- Y(Q) 10.5 1.0 115 70
WNS14-1.0/115/70- Y(Q) 14 1.0 115 70
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