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fireside deposits in coal fired utility boilers

Product Thermal Capacity: 1 - 20 t/h

Working Pressure: 0.7 - 2 Mpa

Available Fuel: Nature gas, coke oven gas, biogas, methanol, liquid propane gas, diesel, heavy oil, light oil, crude oil, etc.

Available Industries: Heat supplying, chemical, food, textile, printing and dyeing, cigarettes and tobacco, fodder, pharmacy, building materials, brewery, rubber, hospital etc.

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Introduction of WNS gas / oil fired steam boiler:

WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere.

Technical advantages:

1. Digitized manufacture
The key part such as material cutting, rolling, drilling are proceeded by advanced CNC machining process to reduce the assemble stress and extend boiler working lifetime.
The front and back smoke chamber plates are cut by CNC plasma cutting machine and looks tidy and beautiful.

2.Easy operation and maintenance
Fully automatically operating, with automatically adjustment and protection of burning, water level, temperature and steam pressure.

3. Longer working life
Smoke tube and tube sheet connection is expanded first to eliminate the gap between them, then adopt automatic argon arc welding to relief the stress and expand boilers working life.
Longitudinal and girth joint adopt advanced automatic submerged-arc welding for good welding quality. All longitudinal and girth joint will have 100% radiographic inspection.
Fin tube us ND steel or stainless-steel material which avoid low temperature corrosion.
Inspection procedure point is set up to guarantee the sequence of expanding and welding, avoid cracking of the tube sheet holes.

4. Less fuel consumption
High quality aluminum silicate fiber is used with fire clay insulation, to control the boiler body temperature below 45℃ to control heat lost.
Sufficient steam storage room and heating area makes boiler to generate high quality steam and high thermal power.
Condenser is added to reuse the waste heat of the exhausted smoke to increase feeding water’s temperature and reduce emission temperature, which can increase the thermal efficiency above 98% and save operating cost.

Copper oxychloride as a fireside additive in coal-fir

File Size: 18KB A plant trial to investigate the effects of copper oxychloride addition on wall slag formation was held during May/June 1986 on Unit 5, a 180 MW(e) boiler at PLEM Buggenum in Holland. The condition of the furnace surfaces was monitored visually, and comprehensive sampling of coal, ash and slag

The Role of Fireside Corrosion on Boiler Tube Failur

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 the furnace heat transfer surfaces.


FIRESIDE DEPOSITS, CORROSION AND EROSION IN COAL FIRED UTILITY BOILERS Speaker: EDWARD LLOYD . Plants burning pulverized coal are typically only 35% efficient due to the effects of coal ash deposits •Reduced operational efficiency and boiler performance

Full-scale study on halloysite fireside additive in 230

The full-scale study of effectiveness of halloysite as fireside additive used to limit the deposits formation in pulverized coal-fired boiler proved that: 1. Halloysite can be fed into a furnace in a dry and comminuted form so that it is not sintered at the furnace gas temperature. 2.

Fireside Corrosion in Coal-Fired A-USC Boile

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

(PDF) A classification of coal-fired boiler deposi

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

Fireside deposits in coal-fired utility boile

A new fuel additive for coal-fired boilers, J. Inst. Fuel 40 (315), 170-172 (April, 1967). 42. LIVINGSTON, W. R. and SANYAL, 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.

Chapter 21 - Boiler Fireside Deposit and Corrosion Contr

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 …

Boiler Corrosion and Monitoring - Ener

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 …

(PDF) A critical review of the use of fireside additiv

A critical review of the use of fireside additives for deposit control in kraft recovery boilers. and coal-fired boiler deposits. boiler fireside deposits and corrosion " supported by

Water blowing of fireside deposits in coal-fired: Utili

@article{osti_7228780, title = {Water blowing of fireside deposits in coal-fired: Utility boilers: Final report}, author = {Kuchner, R.A. and Lee, D.R. and Wesley, D.A.}, abstractNote = {The conclusions derived from the results of the laboratory test, field test and analytical effort were: (1) Furnace-wall tubes constructed of SA 213-T2 (low-chromium alloy) will live much longer when subjected

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