People's living standards continue to improve, the pursuit of a more energy efficient life with hot aspect, comfort and convenience, low emission and environmental protection, this trend led to the boiler industry to clean low nitrogen environmentally friendly development, responding with low nitrogen condensing gas boilers to a more diversified development of intelligent direction. So, what exactly low nitrogen gas boilers advantage of it, why so much praise by users do?
First Affiliated Hospital of Bengbu fully implement the national environmental protection policies, strict screening of clean boiler as the supply of medical supplies disinfection and ward heating equipment. Fast boiler with its focus on research and development of clean-type gas boiler two decades of experience in the industry favored. The partnership, to provide fast boiler First Affiliated Hospital of Bengbu Medical College, a WNS20-1.25-YQ one condensing model steam boiler plans, in terms of design, manufacture, installation and other aspects of strict checks to enhance the thermal efficiency of the boiler as well as truly Energy saving and environmental protection.
Between 1.3 boiler, pump tank, between the gas regulator or a gas generally use water spray fire extinguishing system. The use of a gas fire extinguishing system, in the event of the fire, fire extinguishing system start work, and to close the valve and out of the ventilation system and the room air duct. After extinguishing the fire is determined, and then start the exhaust system, excluding the residual gas, after the fire to ensure the exclusion zone from a lower chamber residual gas, the room ventilation frequency at least four times / h, and air vents provided in a lower room. This specifies the amount of exhaust air from the fire safety system.
Cause damage specific analysis WNS model steam boiler plans 1, a steam boiler WNS Reasons for lack of water subsidence area, i.e. corridor above the flue gas and a convection tube on the bottom of the drum is always in a high temperature superheated state, the sheet-like portion pearlite-temperature regions of the material will globular pearlite gradually change, phase change results in accelerated creep rate, and decrease the rupture strength, severe over-temperature regions of the material is overheated, the grains of austenite and rapid up, tensile strength abruptly decreases, the inner drum steam pressure causes plastic deformation of the film occurs region, gradually collapse. Partially collapsed scale is iron in steel at an elevated temperature with an oxidizing medium synthesized FeO. Outermost layer of oxide is Fe2O3, is a central Fe3O4, and a metal oxide layer at the junction FeO. Decarburized layer is a high temperature steel decarbonization formation. 2, the causes of boiler tube WNS convection tube connecting the steam drum in the form of a plug-side welding, force is weakest region. Length superheat temperature continues to rise so that the wall strength of the material resulting in a continuous decline. Is generally considered to be higher than 200 ℃ steel significantly reduced elastic modulus exceeds 300 ℃ steel yield strength starts to drop. When the temperature of the steel reaches 350 deg.] C or higher, decrease in yield strength at room temperature to yield the desired strength of 2/3 or less, the maximum temperature of the steel 20 450 ℃. When approaching Griddle boiler, the convection wall temperature far exceeding its maximum temperature, the pressure pot under the action of convection and Tube yielding occurs, and because the hoop stress axial stress is 1/2, the spout in the circumferential It is pulled into an oval shape. Finally, longitudinal cracks take over the angle generated between weak parts in the region of the weld structure and apertures along the bridge. The cracks in the tubes and pipes leak and cause a lot of soda unusual noise, which was discovered by the stove staff.