WNS steam boiler is a horizontal three-return oil-fired and gas-fired quick-loading steam boiler with a wet back structure. The first return trip is the corrugated furnace bile, and the second and third return trips are the flue. The boiler is equipped with complete automatic control device and safety protection device to realize full automatic water level.
The fuel of this WNS steam boiler is light oil or natural gas. The fuel is ejected from the burner and ignited by the electronic ignition rod. The fuel is burned in the furnace with micro positive pressure. The high pressure flue gas from the return combustion chamber turns 180° into the threaded flue of the second return journey, and then turns 180° again at the front smoke box into the threaded pipe of the third return journey, and is finally discharged into the atmosphere through the smoke box and chimney.
The WNS steam boiler is composed of boiler body, base, platform escalator, insulation and packaging, valve instrument and accessories, front and rear smoke box and electric control system.
The boiler body with high efficiency is formed by the wet back structure with the lower furnace tube and the left and right flue tubes arranged symmetrically. The boiler barrel is welded by the simplified and the front and rear tubesheals, the first return journey is the furnace bladder, which is welded by the two sections of corrugated furnace bladder. The corrugated furnace structure not only increases the heat transfer area, increases the rigidity of the furnace, but also satisfies the free expansion of the furnace after being heated. The return combustion chamber is composed of a tube body and an inner front and rear tubesheet. The boiler adopts the wet-back structure, which avoids the direct scouring of high-temperature flue gas to the rear flue gas box and improves the reliability of operation. The second return journey is composed of 141 threaded pipes, which can greatly enhance the heat transfer, thus reducing the area heated by convection, making the boiler structure compact and saving steel. The third return journey consists of 94 threaded pipes.
The front and rear smoke box adopts integral type smoke box, the smoke box has opposite open type door, the structure integrity is good, the appearance is generous, the smoke box door of the front and rear boiler is novel, the opening is light, is convenient for the internal inspection and the cleaning.
Advantages of low Nox Condensing steam boiler
- Water pump will make up water through fin-tube bearing pressure steel ccouonizer, effectively absorbing the seasible heat in the smoke.
- The low Nox split hot-air bunuer pecheats the air required for the fuel, realizing fuel sufficient buning and raising furnace temperatune.
- Atmospheric coudenser and water tank cycle to fully rscover the latent hieat in the flue gas, controlling exhaust gas temperature within 60 ℃, to prevent the acid corrosion of condensed water.
- Fin-tube ane manufactured by SUS304 stainless steel material. Compared with the stnight tube, its heat couductivity is inproved by more than 2 times than that of the straight tube.
- Continuous frequency coutrol water supply will realize 40% energy savings.
- Using frequency ratio adjustmnent combustion technology will realize 40% enengy savings and reduce operaing noise.
- Through the FGR systen, nitrogen oxides emissions of flue gas will be effectively controlled within 30mg.
- Boiler feed water system will be equipped by manufactured, simple, beautiful and also save installation cost.
- In sum, condensing heat recovery steam boiler is the erystal of the sciences like heat tonsfer theory, plysics, combustion thoory and materials science, etc. It is betler than the traditional boilers with its absolute economical efficiency.
- The popularization of the condensing boiler is an transformation on thought and conception. Meanwhile, it will inevitably promote the development on the field of heat engineering.
