Cause damage specific analysis WNS steam 2-25ton szl fungus dreg boiler 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.
Of course, but also a concrete analysis of specific situations. We also have a variety of products for small 2-25ton szl fungus dreg boiler heating area, such as commercial, condensation series. If you have more doubts on the heating boiler, please feel free online consultation or call our toll-free hotline 0371-55629010, fast Boiler professional and technical personnel will be happy to assist you.
Hefei Limin Pharmaceutical Co., Ltd. Nanjing Military Region, formerly the backbone of pharmaceutical companies, the main drug is slowly swallow rather teabag, relying on advanced R & D platform to carry out contract manufacturing, OEM OEM and other business cooperation. China's environmental protection development trend began to take shape, many environmental policies have been put forward for a positive response to the national environmental policy, Limin Pharmaceutical decided to introduce a gas station steam 2-25ton szl fungus dreg boilers. After an investigation of the boiler market, Limin Pharmaceutical fast boiler is strong comprehensive strength and wealth of experience working for many years in the pharmaceutical industry to attract, party fast according to the actual needs of customers for its recommendation of one of Taiwan 4 tons of steam condensate gas-fired steam boiler (WNS4-1.25-YQ).
Safety valve manual valve oil-fired 2-25ton szl fungus dreg boiler emission test is necessary to prevent security annex oil-fired boiler overpressure operation when the boiler pressure reaches the pressure relief valve jump start, jump start automatically relieve pressure. If the safety valve does not operate long-term, there is likely to stick to rust inside the valve structure, the valve can not be under pressure to adjust the automatic jump start, will cause the boiler overpressure operation, or even an explosion hazard boiler. In order to prevent the relief valve and valve seat stick, according to "Boiler Code" provides manual drain valve should be periodically tested. Oil-fired boiler Procedure: (1) in the boiler operation, when the state of the pressure pot 75% or more boilers operating pressure is reached, check valve use, to confirm the absence of abnormality, emissions test done manually; (2) valve lifting handle or the weight slowly, this time should jump start exhaust valve; (3) after 3-5 seconds, the weight or the handle down, the safety valve should be closed; (4) If the valve is not closed Yan, should be repeated by lifting the handle hammer until closed. If the valve is still closed tightly, the need for shutdown valve repair or replacement: stop the pump, the pump to stop, stop the fan off the main power, boiler exhaust valve opening, closing sub-cylinder inlet valves, valve disassembly, after repair or replacement, installation of safety valve, and then open the safety valve check if no abnormal, turn off the safety valve; (5) if jump start, a safety valve spool may be stuck foreign matter or embroidered dead, need for safety shutdown a valve for repair or replacement. Safety valve should be manually emission test points to note: (1) the pressure pot manual drain should be at least 75% of the state working pressure, prevent manual drain valve does not jump start at low pressure. (2) If there are two or more boiler safety valve, the discharge should be done in the first row of the high value of the low back valve. (3) for lifting and a manual valve handle should Qingtai light or weight, can not be used for lifting and Meng Jin. These are the emission test and safety valve manually precautions oil-fired boiler, we want to help.
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