Tel

0086-13569929107

What we can do for erosive wear of boiler steels by sand and ash?

erosive wear of boiler steels by sand and ash Despriction

(DOC) Flyash erosion Amrita Amrita Pandey - Academia.edu

The loss of small amounts of material due to erosive wear is enough to cause serious damage and reduce working lifetime of steel components. In fact, more than 25% of all boiler tube failures worldwide are caused by fly ash erosion . In cases of sever erosion , the components get perforated pre-maturely. (PDF) Development of predictive model for fly-ash erosion erosive wear of boiler steels by sand and ashEffect of ash particle concentration on erosion mass loss. Fig. 9. Effect of ash properties on erosion mass loss. Effect of fly-ash mass loading on erosive wear is indicated in Fig. 6; as ash particle quantity increases, so does loss of mate- event is a key parameter in determining time-evolution of erosion rial by erosion .

(PDF) Effects of Tribological Parameters on Slurry Erosion erosive wear of boiler steels by sand and ash

They also evaluated that maximum arc spraying processes onto sand -blasted AISI erosion takes place at impact angle of 90°. 304 steel and the results were compared to those Mishra et al. [52] studied the erosion wear obtained with AISI 431 and ASTM A743 grade behaviour of fly ash illmenite coating using dry CA6NM stainless steels , which are erosive wear of boiler steels by sand and ash (PDF) Investigation of boiler materials with relation to erosive wear of boiler steels by sand and ashfluidized sand and ash particles) may cause . significant degradation of some boiler . erosive wear of boiler steels by sand and ash erosive wear behaviour of boiler steels . Tribo-Co rrosion 2013, 68, 35-44. 3. Antonov, erosive wear of boiler steels by sand and ash (PDF) Solid particle erosion of HVOF sprayed WC-Co erosive wear of boiler steels by sand and ashpetroleum gas as the fuel gases has been used successfully to [16] P. Kulu, T. Pihl, Selection criteria for wear resistance powder coatings under deposit WC-Co/NiCrFeSiB alloy coatings on boiler tube steels . extreme erosive wear conditions, J. Therm. Spray Technol. 11

10.1016/j.triboint.2012.09.011 DeepDyve

Major constitutes of the fly-ash are SiO 2 , Al 2 O 3 , and Fe 2 O 3 . Designers impose limits for the flue gas velocities (1213 m s 1 for erosive ash having high silica content and 1820 m s 1 for less-erosive ash ) to reduce the wear rates, but this also results in the drop of boiler efficiency [2,3] . Fly-ash erosion may be erosive wear of boiler steels by sand and ash 10.1016/j.wear.2014.06.007 10.1016/j.wear.2014.06.007 erosive wear of boiler steels by sand and ashIn many respects, erosive and abrasive wear exhibit many similarities, yet tribosystems suffering from erosive wear may be characterised as open systems with respect to the counterbody, e.g., the solid particles, being continuously replaced, and the wear of the counterbody usually being of negligible importance [1] . 183, pp. 184-196. This le was downloaded from:https erosive wear of boiler steels by sand and ash71 investigated factors influencing the erosion rates on a range of typical boiler steels subject to sand 72 and ash erodent particles. Other studies have used computational fluid dynamics [2], [6], [8], [20] 73 [22] or artificial intelligence (AI) methods [23] to predict erosive wear . 74 75 These studies were limited in some important ways.

342 WEAR REDUCING TECHNOLOGY NEWLY APPLIED

6000 Revolutions with Sand (coatings applied on 1018 carbon steel ) 352. Erosion erosive wear of boiler steels by sand and ash Fly Ash Erosion Test EPRI (Electric Power Research Institute) testing found that IBTCC WC 210 provides superior erosion protection for power boiler fan blades exposed to high-velocity bituminous coal fly ash . EPRI CS - 6068, Project 1649-4 erosive wear of boiler steels by sand and ash A Literature Review of Erosion and Corrosion of Bed Coil erosive wear of boiler steels by sand and ashquantity of erosive material sets additional requirements for the materials used in the boiler parts, as well as generates need for boiler designs minimizing the risk of material loss caused by particle erosion . In a fluidized bed boiler , several areas exist in which the wear is solely related to the presence of fluidized bed material. A MATHEMATICAL DUCTILE EROSION MODEL TO KEYWORDS Mathematical model, erosion rate, boiler components, fly ash impingement, tensile properties, steel grades ABSTRACT Fly ash particles entrained in the flue gas from boiler furnaces in coal-fired power stations can cause serious erosive wear on steel surfaces along the flow path. Such erosion can reduce significantly the operational erosive wear of boiler steels by sand and ash

A Review Paper on Erosion and Corrosion Behavior of

Indian power stations had large amounts of ash (about 50%) which contain abrasive mineral species such as hard quartz (up to 15%) which increase the erosion propensity of coal. Hot corrosion and erosion in boilers and related components are responsible for huge losses both direct and indirect in power generation. A Review on Mechanisms and Testing of Wear in Slurry Three most common wear problems, namely, erosion , erosion corrosion, and abrasion occur in different industries like thermal and hydro power plants, mining, chemical, and marine industries. Therefore, the efficiency of these industries and power Abrasion Resistant Pipe - Power EngineeringBed ash , which is coarse, heavy and resembles beach sand , exits the boilers as glowing grains close to 500 F (260 C) and is carried away from the boilers via a 100 ft (30 m) drag-chain conveyor.

Analytical model for erosion behaviour of impacted y

Fly ash particles entrained in the ue gas from boiler furnaces in coal-red power stations can cause serious erosive wear on steel surfaces along the ow path. Such erosion can signicantly reduce the operational life of the boiler components. A mathematical model embodying the mechanisms of erosion on behaviour, has been developed to erosive wear of boiler steels by sand and ash Assessment of optimum slurry pipe design for minimum stainless steel 304 to be more erosion -resistant. Singh et al. [22] modeled erosive wear of bottom ash slurry ow through a 90 pipe bend. The CFD-based study was used to analyze the erosive wear characteristics at di erent slurry concentrations and ow velocities. Recently, Kannojiya et al. [23] examined the erosive wear characteristics of a erosive wear of boiler steels by sand and ash Author's peral copyErosive wear of internal boiler tubes and other sur- erosive wear of boiler steels by sand and ash correlation of the velocity restitution coef cients for sand par-ticles impacting 410 stainless steel . Meng and Ludema (1995) erosive wear of boiler steels by sand and ash 1.25Cr 1Mo V steel and alloy steel 800. 2.1. Cutting wear When an

Ductile Erosion Model of Fly Ash - Journal of The erosive wear of boiler steels by sand and ash

The erosion damage of a ductile material by fly ash is primarily attributed to [3, 10, 13, 14] the conjoint action of erosion due to cutting wear (micro machining action), repeated plastic deformation wear (extrusionforging mechanism) and deterioration of tensile properties of the steel component at elevated temperature.The repeated plastic deformation may lead to ETIS - Erosive wear of boiler steels by sand and ashErosive wear of boiler steels by sand and ash . Wear , 317, 213224. Publikatsiooni tüüp artikkel ajakirjas Autorid, kellel on ETISe konto Maksim Antonov (Autor) Autorid Kui väljale Autorid, kelle on ETISE konto sai lisada ainult neid isikuid, kes on ETISe kasutajad, siis väljale Autorid tuleks sisestada kõigi publikatsiooni erosive wear of boiler steels by sand and ash Effect of oxidation on erosive wear behaviour of boiler steelsDesigners impose limits for the flue gas velocities (1213 m s 1 for erosive ash having high silica content and 1820 m s 1 for less-erosive ash ) to reduce the wear rates, but this also results in the drop of boiler efficiency , . Fly-ash erosion may be particularly severe in some areas of fluidized-bed boilers that have increased erosive wear of boiler steels by sand and ash

Effect of oxidation on erosive wear behaviour of boiler steels

Erosive wear of four boilers steels 16Mo3, P265GH, P91 and 304 L, was examined using a four-channel centrifugal erosion tester, two types of Erosion Prediction in Turbomachinery Resulting from erosive wear of boiler steels by sand and ashA model to predict erosion on mild steel surfaces impacted by boiler fly ash particles Wear , Vol. 257, No. 5-6 Large Eddy Simulation of the Anti-Erosion Characteristics of the Ribbed-Bend in Gas-Solid Flows Erosion behaviour of boiler component materials at room erosive wear of boiler steels by sand and ashIn this study, the erosion wear behaviour of SAE 208 grade steel , SAE213-T12 boiler steel , SAE213-T91 boiler steel and IS 2062 structural steel were investigated using an air jet erosion test rig. The erosion tests were carried out at the impact angles of 30° and 90°, impact velocity of 42.3 m/s at room temperature and 400 °C.

Erosive Wear - an overview ScienceDirect Topics

Erosive wear takes place when hard solid particles impact on a surface (Tilly, 1977; Hutchings, 1992; Charles et al., 1997) and material loss due to erosion E is measured as the ratio of the mass of removed material with respect to the mass of erosive particles. Erosive wear is due to the impact of hard particles on surfaces. The erosion processes and erosive wear depend on Erosive Wear Problems - FreeErosion represents a major problem, not only in bulk solids handling plant, but in many other areas. In thermal power plant pulverized fuel causes erosive wear of supply lines and nozzles, and the resulting fly ash is a problem with respect to boiler tubes. Both pneumatic and hydraulic conveying of particulate materials in Experimental Study and Prediction of Erosion- Corrosion applied for further investigations of erosion -corrosion of some boiler grade steels [27 and 28]. C. Syamsundar et al. [29] proposed artificial neural networks (ANNs) in concurrence with genetic algorithm (GA) to predict the erosion wear with respect to operating parameters for 16Cr5Ni steels . Zmak, I.

Failure analysis in boiler - Failure Analysis AEIS LLC

Wear Wear , which lead to locally metal loss mechanically seldom comes from the improper installation of boiler which can be avoid by following installation procedure and regularly inspection. Erosion is the major rea that caused the decreasing of OD/ID which has less mechanical strength and rupture eventually. How are pneumatics and hydraulics related to erosive wear?How are pneumatics and hydraulics related to erosive wear?Both pneumatic and hydraulic conveying of particulate materials in pipelines can result in severe erosion problems, and aircraft, rockets, and missiles are eroded by raindrops and ice particles.Erosive Wear - an overview ScienceDirect Topics Improving mill productivity with advanced wear protection erosive wear of boiler steels by sand and ashImproving mill productivity with advanced wear protection solutions, Solutions!, Online Exclusives, April 2005, Vol. 88(4) Extended intervals between scheduled outages, shorter shutdown durations and dwindling maintenance budgets have increased the pulp and paper industrys reliance on advanced wear protection technologies to lengthen conveyance equipment life and maintain

Influence of particle impact conditions and temperature on erosive wear of boiler steels by sand and ash

Abstract The behaviour of four steels that are used in fluidized-bed boilers (16Mo3, T91, 304L and 253MA) has been studied in air (oxidation) and under impacts by sand particles in air (erosion oxidation) at 350650 °C in an extensive test programme and their performance compared in terms of the resulting weight changes and surface appearances. Laser Surface Melting CrNi Coatings, in the Erosive erosive wear of boiler steels by sand and ashThis article summarizes the results of a research on laser-treated CrNi-based coatings under the erosive -corrosive environment of steam boilers containing fly ash and a 33.5% volume of free oxygen at 500 and 800 °C. The total erosion -corrosion process has been measured by sample weighing. Eroded layers were examined by scanning electron Maksim Antonov Tallinn University of Technology erosive wear of boiler steels by sand and ashErosive wear of boiler steels by sand and ash more by Maksim Antonov ABSTRACT Erosive wear of four boilers steels 16Mo3, P265GH, P91 and 304 L, was examined using a four-channel centrifugal erosion tester, two types of sands and one type of ash as the erodant, the particle velocities of 10 and 20 m s1 erosive wear of boiler steels by sand and ash

Mathematical Modelling of Erosion Behaviour of Impacted erosive wear of boiler steels by sand and ash

Fly ash particles entrained in the flue gas from boiler furnaces in coal-fired power stations can cause serious erosive wear on steel surfaces along the flow path. Such erosion can reduce significantly the operational life of the boiler components. A fundamentally-derived mathematical model embodying the mechanisms of erosion involving cutting wear , plastic Mikko UUSITALO Material Technology Manager P&EErosive wear of four boilers steels 16Mo3, P265GH, P91 and 304 L, was examined using a four-channel centrifugal erosion tester, two types of Neural Modeling and Experimental Investigation of the erosive wear of boiler steels by sand and ashIn this study, experimental investigations on solid particle erosion have been carried out for two typical boiler grade steels used for fabricating boiler components, namely, 0.22C steel and 1.25Cr-Mo-V steel . The erosion tests were conducted using an air jet erosion testing facility conforming to ASTM Standard G76 international testing method. Impingement

Neural Modeling and Experimental Investigation of the erosive wear of boiler steels by sand and ash

In this study, experimental investigations on solid particle erosion have been carried out for two typical boiler grade steels used for fabricating boiler components, namely, 0.22C steel and 1.25Cr-Mo-V steel . The erosion tests were conducted using an air jet erosion testing facility conforming to ASTM Standard G76 international testing method. Impingement SLURRY EROSION BEHAVIOR OF OIL AND GAS PIPELINE One major drawback of carbon steels and API X-series steels is their susceptibility to erosion degradation. The co-existence of three phases carrier liquid (oil), hard solid particles (abrasive particles) and material surface (pipeline inner surface) are responsible for slurry erosion in pipelines. Despite pipelines good safety record, this complex mode of failure reduces the pipe Study on the Erosion and Abrasion Mechanism of the Download Citation Study on the Erosion and Abrasion Mechanism of the Modern Artillery Barrel As a certain type of artillery barrel erosion and abrasion for the study, the formation mechanism erosive wear of boiler steels by sand and ash

The FeCr-Based Coating by On-Site Twin-Wire Arc Spraying erosive wear of boiler steels by sand and ash

The effect of heterogeneous microstructure on the coating erosive wear behaviors has been investigated. erosive wear of boiler steels by sand and ash M. Uusitalo, and M. Antonov, Erosive Wear of Boiler Steels by Sand and Ash , Wear , 2014, 317(1), p 213-224. CAS Article Google Scholar 6. J. Ahmad, J erosive wear of boiler steels by sand and ash The Properties of the High Productive High Velocity Arc erosive wear of boiler steels by sand and ashThe boiler tube and boiler components used in a coal fired power generator plant are attacked by the fly ash contained in the coal fired gas. Since the fly ash collides the boiler components surface at high speed, when the amount of erosion wear exceeds at the limit of safety, they are obliged to exchange. Thermal spray method is expectable as Wear Processes SpringerLinkAbstract. In the study of the wear failures, it is usual to consider the wear processes defined with reference to the type and geometry of relative motion between two mating surfaces (Fig. 4.1). In general, each wear process is due to one (or more) wear mechanisms . Table 5.1 lists some examples of tribological systems with the main wear mechanism.

Weartech SHS Thermal Spray Coating on Boiler Tubes Case erosive wear of boiler steels by sand and ash

Inside a CFB boiler at a coal-fired power plant in Pennsylvania, a thermal spray coating field trial compari was conducted on a section of boiler tubes where the most severe erosion damage occurs. Weartech SHS7170 WTWAS was applied to a 7 x 5 ft. (2.1x 1.5 m) section of boiler tubes between two LMC Armacor thermal spray coatings of equal erosive wear of boiler steels by sand and ash What causes erosive wear on boiler nozzles?What causes erosive wear on boiler nozzles?In thermal power plants pulverized fuel causes erosive wear of supply lines and nozzles, and the resulting fly ash is a problem with respect to boiler tubes.Erosive Wear - an overview ScienceDirect Topics What is the role of erosive wear in coupling?What is the role of erosive wear in coupling?Erosive wear is typical of coupling in which one of the antagonists is in the fluid stage and is associated with the abrasion produced by particles contained in the fluid, often combined with a chemical action facilitating erosion of the metal matrix.Erosive Wear - an overview ScienceDirect Topics

When does erosive wear occur on a surface?When does erosive wear occur on a surface?Erosive wear takes place when hard solid particles impact on a surface (Tilly, 1977; Hutchings, 1992; Charles et al., 1997) and material loss due to erosion E is measured as the ratio of the mass of removed material with respect to the mass of erosive particles. Erosive wear is due to the impact of hard particles on surfaces.Erosive Wear - an overview ScienceDirect TopicsCited by 1 Publish Year 2015 Author Suchandan K Das, D Mandal, K L Sahoo 14 mins A Literature Review of Erosion and Corrosion of Bed Coil erosive wear of boiler steels by sand and ash

Xie and Walsh [3] measured the erosion of carbon steel by fly-ash and unburned char particles in the convection section of an industrial boiler firing micronized coal. Ash and char particles suspended in the flue gas entrained by the jet were accelerated towards the surface of the specimen under varying temperatures (4506500C).Cited by 13 Publish Year 2014 Author E. Huttunen-Saarivirta, H. Kinnunen, J. Tuiremo, M. Uusitalo, M. Antonov Erosive wear of boiler steels by sand and ash Request PDFErosive wear of four boilers steels 16Mo3, P265GH, P91 and 304 L, was examined using a four-channel centrifugal erosion tester, two types of

Cited by 23 Publish Year 2013 Author Maksim Antonov, Renno Veinthal, Elina Huttunen-Saarivirta, Irina Hussainova, Ahto Vallikivi, Martyna erosive wear of boiler steels by sand and ash Erosion durability of steels in steam boiler heat erosive wear of boiler steels by sand and ash

In a fluidized bed, burning takes place in an inert material, sand and ash , fluidized by primary air. In both pulverised fuel burning boilers and fluidized bed boilers , there exist gas flows with high particle loads. Particulate materials in the flue gas flow cause erosion wear when colliding with heat exchanger tubes or channel walls.Cited by 7 Publish Year 2000 Author Vesa Meuronen High temperature erosive wear of a boiler tube steel6. 1. 1 Analysis of the plant fly ash prior to and post target impact 6. 1. 2 Differences in erosive wear rates between different power plants 6. 1. 3 Analysis of the SiC and Si02 particles prior to and post impact 6.1.4 The effect of temperature on erosion wear rates for fly ash , SiC and Si02 6. 1. 5 The effect of erodent type on angle of erosive wear of boiler steels by sand and ash 4 mins INVESTIGATION OF BOILER MATERIALS WITH RELATION boilers (e.g., elevated temperatures, oxidizing atmospheres and impacts by fluidized sand and ash particles) may cause significant degradation of some boiler components, such as tubes of heating surfaces, by a combination of oxidative attack and erosive wear [4]. Scheme of CFB boiler in NPP is illustrated in Fig. 1. Fig. 1.

sciencedirectSep 15, 2014Erosive wear of boiler steels by sand and ash - ScienceDirect

Cited by 13 Publish Year 2014 Author E. Huttunen-Saarivirta, H. Kinnunen, J. Tuiremo, M. Uusitalo, M. Antonov Erosive wear of four boilers steels 16Mo3, P265GH, P91 and 304L, was examined using a four-channel centrifugal erosion tester, two types of sands and one type of ash as the erodant, the particle velocities of 10 and 20 m s 1 and the impact angles of 30°, 45° and 90°. The erodants varied in terms of abrasivity, which may be explained by their different composition, shape and size. Erosive wear of boiler steels by sand and ash - ScienceDirectErosive wear of boiler steels by sand and ash . Author links open overlay panel E. Huttunen-Saarivirta a H. Kinnunen b J. Tuiremo b M. Uusitalo b M. Antonov c

Machining EQUIPMENT

Production and Processing Equipment

Deep-Hole Drilling Machine

Deep-Hole Drilling Machine

DAE-YANG Drilling Machine

DAE-YANG Drilling Machine

Multi-Drilling Machine

Multi-Drilling Machine

Three Rolling Machine

Three Rolling Machine

Four-rollers bending machine

Four-rollers bending machine

Rolling Machine

Rolling Machine

Spinning Machine

Spinning Machine

800T Cold Press Machine

800T Cold Press Machine

Ask Any question

Feel Free to Contact

Contat us

As leading steel supplier, We are not only supplies standard size steel materials, but also has own steel processing center, which can meet your diversified shape and size requirements about steel components based on the drawing or sample.