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POWER AND INCINERATION INDUSTRY

 

Power

Refractory technology for this industry has changed with the evolution of new demands for power and economic and environmental concerns.  A wide variety of materials are available for use in industrial boilers, package boilers, cyclone boilers, waste-to-energy units, CFB''s, ash hoppers and others.

Boiler Refractory Applications

Power Generation

Ash Hopper Refractories

Incineration


Boiler Refractory Applications

Penthouse

 

Special Applications

Furnace Walls 

Ducts
Burners
Ash Hopper

 

Boiler Refractory Application Guide

Furnace Walls Inside Casing & Tangent Wall Outsitde Casting 
Tangent Wall Inside Casting
Opening Patch and Access Doors


Penthouse Floor 


Ash Hopper Lining 


Ducts Inside Linings 

 
Burners Tangential and Front Fired

 
Special Applications Slagging Bottom Boiler 

Cyclone Boiler Studded Tubes

Baffles and Boiler Seals
Floors (Industrial Boilers)
Stoker Pier (Industrial Boilers)
Hearth (Recovery Boilers)


 

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Power Generation

The correct selection of refractory for CFB''s can prolong service life and improve overall operational efficiancy.  ANH has been a preferred refractory supplier to the Power Industry for over 50 years.

H-W product families offer a complete package of solutions for all service conditions
:

  • EXCELERATE: abrasion resistant ramming / gunning material
  • GREENGUN: gunable plastic
  • KAST-O-LITE: insulating castables
  • NARCOGUN: silicon carbide gun mix
  • PLASTECH: abrasion resistant phos bonded
  • THERMAX: Thermal shock resistant vitreous silica castable
  • VERSAGUN: low cement gunmixes
  • VERSAFLOW: low cement castables
 

 

Fuel Feed Systems  Service Conditions:
  • Abrasion
 Lining Solution:


Combustor

Service Conditions:

  • Abrasion
  • Thermal Cycling

 Lining Solution:


Crossover duct

 Service Conditions:

  • Abrasion
  • Ash Penetration
  • Thermal Cycling

 Lining Solution:

  • Greengun 85 Plus
  • Versagun ABR

Cyclones

 Service Conditions:

  • Abrasion
  • Fule Reactions
  • High Temperature

 Lining Solution:


Ash Return Systems

 Service Conditions:

  • Abrasion
  • Thermal Cycling
  • Ash Penetration
  • Expansion Cracks (Volume Stability)

 Lining Soulution:


Outlet Ducts / Eternal Heat Exchangers Ash Coolers

 Service conditions:

  • Abrasion
  • Thermal Shock

 Lining Solution:



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Ash Hopper Refractories

Ash-Hopper Service

Ash hopper service includes a number of conditions, which can be detrimental to a refractory lining.  Refractories used in this service must show good resistance to a variety of destructive conditions.

  • Airborne particulate generated during combustion can cause severely abrasive conditions.
  • Slag can fall into the hopper in large chunks called "clinker".  The impact of this clincker upon the refractory can be quite severe.
  • In the case of wet-bottom ash hoppers, the splash generated by falling clinker can introduce severe thermal shock.
  • Products installed in ash hoppers can be cast, gunned or sprayed.
 

 

Tufshot LI Service Classification - Less Severe
Installation Method - Gun
Impact Resistance - Good
Thermal Shock Resistance - Fair
Abrasion Resistance - Fair

 

Tufcast LI Service Classification - Less severe
Installation Method - Cast
Impact Resistance - Good

Thermal Shock Resistance -
Fair
Abrasion Resistance - Fair


Lo-Abrade G Service Classification - Severe
Installation Method - Gun
Impact Resistance -
Excellent
Thermal Shock Resistance - Good

Abrasion Resistance -
Good


Versaflow 45 Plus Service Classification - Severe
Installation Method - Cast
Impact Resistance - Excellent
Thermal Shock Resistance - Fair

Abrasion Resistance -
Good


Versaflow Thermax Plus Service Classification - Most Severe
Installation Method - Cast
Impact Resistance -
Excellent
Thermal Shock Resistance -
Excellent
Abrasion Resistance - Excellent


Versagun Thermax Adtech Service Classification - Most Severe
Installation Method - Gun
Impact Resistance - Excellent

Thermal Shock Resistance -
Excellent
Abrasion Resistance - Good


Greentec 170 LG Service Classification - Most Severe
Installation Method - L.C Gun
Impact Resistance - Excellent

Thermal Shock Resistance -
Good
Abrasion Resistance - Excellent

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Incineration

Incineration of corrosive waste has become an increasingly acceptable method of disposal for these materials.  Commercially and privately operated incinerators will be a part of the foreseeable future.  Conditions relative to refractory longevity vary throughout these units. Careful selection of refractory materials is required to achieve long running campaigns and maximise cost effectivness.  Thermal profiles, waste streams, generated slag and operating practices are individual for each incinerator in operation.  Therefore refractory practice is an individual matter.

Incinerators are used to destroy -

  • Liquids / Sludge / Solids / Gases

Incinerator Conditions -

  • Temperature - 900 to 1450°C
  • Abrasion - solids, metals, gas streams
  • Chemical - sulphur, chlorine, organics
  • Slags - ashes, metals, phosphates, chemical
  • Gases - organics, chemicals
  • Mechanical - metal drums, slags

Types of waste -

  • Medical - hospitals, pharmaceuticals
  • Industrial - tiers, inks, packing
  • Cremation - local authorities, veterinary
  • Sewerage - water companies
  • Municipal - town refuse
  • Agriculture - animals, soils
  • Government - money, military, drugs, documents
  • Chemical - dangerous toxic wastes, petrochemicals
  • Power Gen - heat recovery systems
  • Marine - shipboard wastes

Types of Incinerators -

  • Municipal - moving-rotary grate, CHP
  • Fluid bed - circulating, bubbling
  • Rotary - chemicals, solids, liquids
  • Multi Hearth - sewerage
  • Modular - medical, solids
  • Cremators
  • Waste Boiler - paper, oils, sugar cane
  • Waste Gas - flare stacks
  • Thermal Oxidisers
  • Coal/Oil Gasifiers
  • Spent Caustic Incinerators

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