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CiteSeerX — DEVELOPMENT OF FIRESIDE CORROSION MODELS …

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): A comprehensive fireside corrosion project was undertaken to better understand the corrosion mechanisms operating on the lower furnace walls and superheaters/reheaters in modern coal-fired utility boilers. Eight U.S. coals commonly burned in boilers are being selected to represent a wide range of coal chemistry.

US4190421A - Fireside treating compositions - Google Patents

This invention constitutes improvement in the art of introducing fuel additives into the fireside of coal fired boiler tubes to facilitate the removal of slag and like deposits from the fireside, to lower acid smut pollution, to control corrosion, and to improve the electrical resistivity of particulate emission. The improvement is achieved by the addition of pulverized coal to the fuel additives.

Boiler Corrosion and Monitoring

Boiler Corrosion and Monitoring Incidence of excessive boiler tube metal wastage due to fireside corrosion has long been a significant issue for coal-fired utility boilers. Boiler design rules and features introduced in the 1950's and 1960's in response to corrosion problems at …

Influence of Coal Quality and Boiler Operating Conditions ...

Mr. Hatt's article titled "Fireside Deposits in Coal - Fired Utility Boilers"(1) provides a good description of the particulars concerning the location and nature of most ash deposits. Wall Slag Wall slag is the molten slag that builds up on the furnace walls. Wall slag is …

A Review on Boiler Deposition/Foulage Prevention and ...

coal-based power station boilers, that10–20 μm kaolin making up 2–3% by weight of the feed is effective in reducing the ash problems [13]. 3.5 Monitoring of Fouling Tendencies . Continuous fouling formation on heat transfer surfaces is a great problem in existing conventional coal fired utility boilers.

Slagging properties of coals and allowance for them in the ...

It is shown that out-of-design coal should be used only after computational analysis of slagging of the boiler. The use of ash fusibility as a criterion for the analysis should be avoided because this property does not reflect the slagging properties of coal to an acceptable degree. Parameters characterizing the properties more appropriately are presented. It is shown that slagging of an ...

Development of Computational Models to Predict Boiler Tube ...

the lower and upper furnace of advanced coal-fired utility boilers. Combustion of nine U.S. Coals in a pilot-scale testing facility under staged air combustion. Online measurement of corrosive gaseous species and collection of ash deposits. To develop models and predictive equations for fireside corrosion on furnace walls and superheaters.

COAL-FIRED UTILITY BOILERS: SOLVING ASH DEPOSITION ...

The accumulation of slagging and fouling ash deposits in utility boilers has been a source of aggravation for coal-fired boiler operators for over a century. Many new developments in analytical, modeling, and combustion testing methods in the past 20 years have made it possible to identify root causes of ash deposition.

(PDF) A classification of coal-fired boiler deposits

Fireside deposits in coal-fired utility boilers. Article. Dec 1990; PROG ENERG COMBUST; Rod Hatt; Coal ash deposits in coal-fired boilers represent a significant problem for many utilities. The ...

CFD Evaluation of Waterwall Wastage in Coal-Fired Utility ...

CFD Evaluation of Waterwall Wastage in Coal-Fired Utility Boilers. 242 Energy & Fuels 2007, 21, 242-249 CFD Evaluation of Waterwall Wastage in Coal-Fired Utility Boilers James R. Valentine,* Hong-Shig Shim, and Kevin A. Davis Reaction Engineering International, 77 West 200 Street, Suite 210, Salt Lake City, Utah 84101 Sang-Il Seo and Tae-Hyung ...

Fireside Corrosion in Coal-Fired A-USC Boilers

and upper furnace of coal-fired utility boilers Combustion of eight U.S. coals in a pilot-scale testing facility under staged air combustion Online measurement of corrosive gaseous species + collection of ash deposits Generate corrosion database Perform laboratory corrosion tests under realistic conditions

US4796548A - Method of conditioning fireside fouling ...

In a coal fired boiler of the type having a combustion zone in which said coal is fired, a convection zone located downstream from said combustion zone and having a plurality of heater tubes disposed therein adapted to heat water or steam disposed therein, and in which convection zone combustion residues emanating from said coal have a tendency to stick to or agglomerate upon said tubes, a ...

The Role of Fireside Corrosion on Boiler Tube Failures ...

The Role of Fireside Corrosion on Boiler Tube Failures, Part II. One of the primary challenges of reliably burning coal is managing the corrosion experienced by …

Monitoring and prediction of fouling in coal-fired utility ...

:. This paper describes a systematic approach to predict ash deposits in coal-fired boilers by means of artificial neural networks. The approach is of a "grey box" nature, decomposing the problem into logical parts, and avoiding the use of sophisticated data. Although it is relative to the specific fuel and equipment, the prediction is ...

Fireside deposits in coal-fired utility boilers ...

A new fuel additive for coal-fired boilers, J. Inst. Fuel 40 (315), 170-172 (April, 1967). 42. LIVINGSTON, W. R. and AL, A., A field evaluation of the effect of copper oxychloride as a fireside additive in the control of furnace wall slagging in coal-fired utility boilers, EPRI Coal Quality Conf., Atlanta, CA (October 13-15, 1987). 43.

Deposition and Corrosion in Straw- and Coal-Straw Co-Fired ...

Energy & Fuels 2000, 14, 765-780 765 Deposit Formation in a 150 MWe Utility PF-Boiler during Co-combustion of Coal and Straw Karin H. Andersen,‡,§ Flemming J. Frandsen,*,† Peter F. B. Hansen,‡,| Kate Wieck-Hansen,⊥ Ingvard Rasmussen,⊥ Peter Overgaard,⊥ and Kim Dam-Johansen† Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark, and ...

Fireside Corrosion - High Temperature Corrosion - Wiley ...

Corrosion in coal-fired boilers is frequently referred to as coal-ash corrosion particularly when the aggressive phenomena are mainly due to the nature of the ash that deposits on the heat-absorbing surfaces of metallic components. Fireside corrosion can present a serious problem in oil-fired boilers or refinery/petrochemical furnaces fired ...

Development of Fireside Performance Indices for Coal-Fired ...

Abstract. A series of eight fireside performance indices have been developed for pulverized coal-fired utility boiler systems. The indices are calculated to predict slagging, high-temperature fouling, low-temperature fouling, slag tapping ability, opacity, tube erosion, …

Investigation on Slagging Fouling Potential in Coal ...

The majority of power plants in Indonesia are Coal-Fired Power Plants (PLTU) which using coal as the main fuel. The coal used in the PLTU is coal that has been adjusted to the existing PLTU design. However, coal availability according to the initial design of the PLTU is running low and even almost non-existent. If the coal does not meet the PLTU design specifications is forced to be …

Fireside Corrosion of Alloys for Combustion Power Plants

Fireside metal wastage in conventional coal-fired boilers can occur by gas-phase oxidation or deposit-induced liquid-phase corrosion. The former can be minimized by using materials that are resistant to oxidation at the service temperatures of interest.

Fireside Deposits In Coal-Fired Utility Boilers

FIRESIDE DEPOSITS IN COAL-FIRED UTILITY BOILERS RODERICK M. HATT Island Creek Corporation, Lexington, KY, U.S.A. Abstract—Coal ash deposits in coal-fired boilers represent a significant problem for many utilities. The use of laboratory coal analyses to predict deposit formation and the deposit analysis have advanced consider-

CiteSeerX — DEVELOPMENT OF FIRESIDE CORROSION MODELS …

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): A comprehensive fireside corrosion project was undertaken to better understand the corrosion mechanisms operating on the lower furnace walls and superheaters in modern coal-fired utility boilers. Eight U.S. coals commonly burned in boilers have been selected to represent a wide range of coal chemistry.

Fault Diagnostics on Steam Boilers and Forecasting System ...

The slagging/fouling due to the accession of fireside deposits on the steam boilers decreases boiler efficiency and availability which leads to unexpected shut-downs. Since it is inevitably associated with the three major factors namely the fuel characteristics, boiler operating conditions and ash behavior, this serious slagging/fouling may be reduced by varying the above three factors.

(PDF) A critical review of the use of fireside additives ...

utility boiler deposits. ... and coal-fired boiler deposits. ... This work is part of the research on " Control of recovery boiler fireside deposits and corrosion " supported by NSERC through its ...

Modelling of fouling and slagging in coal-fired utility ...

FUEL PROCESSING TECHNOLOGY ELSEVIER Fuel Processing Technology 44 (1995) 155-171 Modelling of fouling and slagging in coal-fired utility boilers T.A. Erickson a,*, S.E. Allan a, D.P. McCollora, J.P. Hurley', S. Srinivasachar", S.G. Kangb, J.E. Baker', M.E. Morgan b, S.A. Johnson b, R. Borio' a Energy & Environmental Research Center, Grand Forks, ND, 58202-9018, USA b PSI …

Successes Validation of Fireside Performance Indices Using ...

a knowledge base of fundamental information on how ash deposits form inside coal-fired ... and maintenance costs attributed to ash deposition and ash formation in utility boilers. ... model that provides a more reliable means for utilities to screen coal and coal blends for fireside performance in coal-fired boilers.

Fireside Corrosion and Erosion/Corrosion Protection in ...

This paper discusses automatic gas-metal-arc-welding (GMAW) overlay cladding for fireside corrosion and erosion/corrosion protection of the waterwall in coal-fired boilers equipped with a low NOx burner system. In addition, the use of overlay cladding for protection against steam soot blower erosion is discussed.

Fireside slagging, fouling, and high-temperature corrosion ...

The process of steam raising as a source of heat or means of generating electricity using combustible fuels began with the turn of the century. From the very beginning, impurities in the fuels were responsible for added maintenance, a reduction in rate of heat transfer and corrosion due to fireside deposits of sintered or molten ash. The nature and severity of deposit formation, i.e. slagging ...

Rod Hatt - Coal Combustion Publications

"Fireside Deposits in Coal-Fired Utility Boilers" Progress in Energy and Combustion Science, 1990, Vol. 16, pp. 235 - 241. "Classification and Sampling of Deposits from Coal‑Fired Boilers." Journal of Coal Quality April‑June 1989, Vol 8, No 2.

Combustion and deposit formation behavior on the fireside ...

The formation of deposits not only lowers the heat transfer rates, resulting in frequent maintenance and unscheduled shutdowns, but may also increase the risk of fireside corrosion of the metal surfaces. The formation of deposits in coal-fired utility boilers is intricately related to the combustion and ash formation behavior of the coal being ...

Water Handbook - Boiler Fireside Deposit and Corrosion ...

The combustion of coal tar in boilers often produces objectionable amounts of sodium salts and/or iron compounds on boiler convective surfaces. Often, ash deposits are similar in composition to coal ash. Combustion of solid fuels such as coal and bark (also referred to …

Co-firing straw and coal in a 150-MWe utility boiler: in ...

The boilers have included various types of stoker-fired boilers designed for straw combustion 15, 16, 18, CFB-boilers co-firing coal and straw with up to 50% straw on an energy basis 13, 19, 28and PF-boilers co-firing coal and straw with up to 30% straw on an energy basis 19, 20, 29.

How to Stop Boiler Tube Wastage Caused by Corrosion and ...

Pulverized coal fired boiler experienced slope damage caused by low oxygen levels. ... sulfur will combine with hydrogen and deposit ... time the fireside of the tubes in the boiler were inspected by