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Jinan Yuanda Power Equipment Co.,Ltd.

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Jinan Yuanda Power Equipment Co.,LTD is a modern enterprise which produces and sells complete sets of power equipment and accessories ,1T/h-660T/h boiler parts and accessories.With the advantages of scientific research,mass production,professional technical consultation,timely delivery and installation maintenance,our products are sold all over the world. We have provided quality and affordable products for thousands of power plants,thermal power stations and heating companies, such as Chemical plant,Textile plant,Food & Beverage,Garment manufacturing,Paper Plant,Printing and dyeing mill,Cement Plant,Fertilizer plant,Feed mills,Rubber factory.Schools,Hotel,Bath Center,Swimming Pool,Hospital,Hotel,etc. In China,we enjoy a high reputation.We provide various kinds of boiler fittings,such as economizer,membrane water wall,super heater ,air pre-heater,Boiler Drum, Boiler Header,water cooled jacket,center cylinder,super-heater bracket,super-heater clamp,tube shield,boiler nozzle,expansion joint pipe,coal feeder,grate bar,tube bend etc.Meanwhile,boiler improvement technical consultation,OEM and ODM is also accepted.

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  • The Function Of Boiler Economizer

    June 17, 2021

    The first function is to increase the temperature of the feed water, and the boiling economizer can also generate a small amount of steam. The feed water entering the economizer comes from the deaerator. The water temperature of the low-pressure deaerator is generally 104°C, and the water temperature of the high-pressure deaerator is about 158°C. The saturation temperature of the medium-pressure furnace (4.4Mpa) is about 256°C, and the saturation temperature of the high-pressure furnace (11 Mpa) is 317°C, which is much higher than the temperature of deoxygenated water. If there is no economizer and the feed water directly enters the steam drum, because the water entering the downcomer is too hot, a large part of the heating surface of the water wall is used to increase the water temperature, and the heating surface used to generate steam is reduced, so that the boiler evaporates The amount is reduced. After installing the economizer, the water temperature can be significantly increased. For the boiling economizer, the water temperature can be increased to the saturation temperature under the boiler pressure, and a small amount of steam can be generated (about 10% to 20% of the boiler's evaporation capacity). When the water is fed into the water wall to absorb heat, it can be vaporized, and the boiler's evaporation capacity is significantly increased. The second function is to reduce the temperature of the flue gas, recover the heat of the flue gas, improve the thermal efficiency of the boiler, and save fuel. The temperature of the flue gas at the outlet of the superheater is about 700℃. Even if a large number of convection tube bundles are arranged behind the superheater, the temperature of the flue gas leaving the convection tube bundle is still as high as 250-350℃, and the temperature of the flue gas leaving the convection tube bundle is still as high as 250-350℃. Contains a lot of calories. Installing an economizer after the superheater o

  • Boiler Maintenance, Repair and Upgrates

    June 15, 2021

    Boiler tube failures, especially in coal-fired power plants, is the major cause of boiler forced outages. However, if a tube leak is detected early more severe damage to surrounding tubes and tube banks can be prevented. Common methods for determining tube leaks in their early stage are on-line acoustic monitoring and off-line non-destructive testing. Software is also available for documenting and analyzing the problem of premature tube leaks. Although most of the older coal-burning plants were designed for baseload operation, many of these plants are now being operated as cycling units. Unfortunately, because the units were generally not designed for cycling operation a variety of problems have occurred with pressure parts and steam/water systems. A change in heat absorption from switching fuels can also cause tube problems. Cycling can result in various problems: Poor load following Increased downtime and maintenance costs Tube overheating and limited boiler capacity. In addition, there is the potential for excessive water deposition due to low flow, feed-water control fluctuations, and header cracking and distortion. High Temperature Headers According to B&W, because superheater and reheat outlet headers are exposed to temperatures greater than 900 F, they present some of the most challeng

  • How Often Should Industrial Boilers Be Inspected?

    June 11, 2021

    The industrial boiler`s external inspection usually is once a year and internal inspection is once every two years. In addition, a boiler should accept hydraulic test every six years. Those boilers that can not be inspected internally should accept hydraulic test every three years. Utility boiler`s (power plant boiler) internal inspection and hydraulic test cycle can be adjusted according to the overhaul cycle of power plant. The boiler can be put into operation only when its internal inspection, external inspection and hydraulic test are qualified within the validity period.

  • Analysis On The Main Causes Of Leakage Of Boiler Economizer Tubes

    June 07, 2021

    1. The uneven distribution of flue gas temperature in the flue leads to thermal fatigue of the boiler economizer tube. Due to the traction effect of the induced draft fan and the inertia of the flue gas activity, there is a large rotating airflow at the exit of the furnace and the vertical flue. The overlapping of the rotating airflow causes the back wall side to be larger than the front wall side, so that the smoke at the economizer site The smoke velocity in the duct is different, resulting in a temperature dispersion error in the flue shaft, and the temperature error of the left and right side smoke is 40-80 degrees Celsius. 2. The sulfur in the fuel gas corrodes the economizer tube. Due to the presence of harmful impurities such as S and Cl in blast furnace and coke oven gas, acid gases such as sulfur oxide, sulfur dioxide, hydrogen sulfide, hydrogen chloride, etc. are generated during the incineration process. Various chemical substances jointly corrode the pipe wall dynamically at high temperatures and contain sulfur compounds. Monoatomic sulfur occurs at high temperatures, and sulfur reacts with the iron of the pipe to form iron sulfide, which corrodes the pipe wall. 3. Impact corrosion of flue gas and ash particles. The flue gas in the middle of the boiler economizer connection is led out through the flue, and there is a vortex. The vortex area affects both the static pressure dispersion in the connection and the resistance coefficient of the branch pipe inlet, resulting in uneven flow velocity of the flue gas between the economizer controls. The corrosion of the flue gas and the erosion of the ash particles are carried out on the surface of the metal. Since the amount of metal wear of the economizer tube is proportional to the third power of the flue gas flow rate, the local tube wall with high smoke velocity is severely worn and thinned, and the boiler runs If the incineration air volu

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