Boiler four fan blades wear corrosion repair

Four tube boiler system working in harsh environments, easy to produce high temperature corrosion and wear, resulting in wall thinning lead to leakage of boiler pipes burst pipe incidents, boiler, "four" high-temperature corrosion and wear thermal power plant has been a serious problem in common, which is direct harm mainly of: a) wall thinning, according to statistics about annual general thinning of about 1mm, severe up to 5 ~ 6 mm, resulting in serious risk the safe operation of the boiler, increasing the plant's temporary maintenance and overhaul workload, resulting in great economic losses to the power plant. b) the occurrence of sudden wall boiler tube rupture, causing an emergency shutdown to repair, not only disrupted the normal order of power plants, reducing power output, and increased labor intensity and extra maintenance costs, directly affect the economy benefits. In recent decades, at home and abroad for the high-temperature circulating fluidized bed boiler, coal boiler erosion, wear mechanisms and protection techniques were extensive testing, research and applications, primarily to take protective measures in the following three aspects: the design and operation So far, the good times and Germany are the following measures to prevent the heating surface wear: 1) changing the geometry of the water wall, fire resistance combined with easy bends make ignition belt region of the upper water wall tube to keep straight downstream, eliminate local produce grindability area; 2) increase the separation efficiency of the gas-solid separation device, can reduce the concentration of ash in the flue gas, thus reducing wear and tear on the heating surface; and 3) a reasonable choice of smoke speed design; 4) reducing the velocity and fly ash concentration unevenness, such as the installation of a flue bends in the guide plate, arranged condensate residue cyclone flue pipe, to prevent severe localized wear; 5) heating surface tubes as far as possible the smooth arrangements; 6) to prevent soot corridor formation; 7) The membrane economizer or finned heating surface; 8) bundles preceded fenders; 9) local grindability of the thick-walled tube; 10) to prevent wear and corrosion occur simultaneously; 11) of the cyclone separator wear anti-wear area Methods brick structure instead of using the conventional casting refractories; 12) to strictly control the primary air flow; 13) to ensure that coal-fired desirable size; a series of protective measures taken in the design and operational aspects, These methods have been proven to wear some effect; good times the German surface treatment technology for thermal spraying to protect the boiler tubes are mainly the following four: Flame spraying (Flame Spraying), arc spraying (Arc Spraying), plasma spraying (Plamsa Spraying) and high-speed flame spraying (HVOF) products and services introduced 1, 2 flux-cored hardfacing, thermal spray wire 3, wear-resistant composite steel plate 4, construction 6 hardfacing, thermal spray Pledge : Pre-sale services: to provide you with project design, process design, equipment purchase to develop your program according to your specific needs, design and manufacture products for your technical training technical operations staff Sale of services: to accompany you to completion and acceptance of the equipment, assist in the development process of the construction program and detailed after-sales service: The company sent technicians to the scene to guide the equipment installation, commissioning and training of site operators 24/7 phone service 24 hours and holidays as usual service!