Ash and Material Handling
Engineered systems for a range of applications

Bottom Ash Systems   

Allen-Sherman-Hoff Ash Handling Hydrobin

In addition to providing operational and environmental benefits, B&W's Allen-Sherman-Hoff® bottom ash systems are a reliable and cost-effective alternative to ash storage ponds. Systems include:

  • Submerged Grind Conveyors 
  • Hydrobin® dewatering systems
  • Dry bottom ash conveyer systems
  • Submerged chain conveyor for under-the-boiler ash removal from the water-impounded hopper
  • Remote dewatering systems for bottom ash dewatering and water recycling.  

Fly Ash Systems          


B&W's Allen-Sherman-Hoff® fly ash systems are a reliable, low maintenance, cost-effective means to minimize the use of plant process water and utilize FGD wastewater.  Designs include:

  • Conventional fly ash and scrubber byproduct material handling systems
  • Vacuum, pressure, and combination fly ash conveying systems
  • Dense phase pressure systems and related services. 

Fuel In-Feed, Conveyors

Loibl Conveyor Systems

The reliable, safe and uninterrupted supply of individual fuel for boilers is essential to power generation.  B&W provides a range of solid fuel conveyance and in-feed technologies to transport and process fuel for power, heat and process steam generation.  Fuels include coal, biomass, and waste fuels including refuse-derived fuel (RDF) and municipal solid waste (MSW). 

FGD Reagent/Byproduct

Wet FGD Reagent Byproduct Conveyance

Wet flue gas desulfurization systems can be supplied with forced oxidation to produce a marketable gypsum byproduct or inhibited oxidation to eliminate the wastewater discharge stream. B&W's material conveying systems are integrated with the FGD system to support the transport and processing of reagents, including limestone, lime or sodium, as well as gypsum byproduct.

Bulk Material Transport 

Bulk Material Transport Loibl
B&W Loibl plans and manufactures a wide range of customer specific conveyance solutions for bulk materials of all types. This ranges from single conveyor belts to customized, complete, conveyance technology systems.  Applications include power, paper, steel and metal, chemical, mining, food, construction and other process industries.

Aftermarket Services & Replacement Parts 

Babcock & Wilcox responds to and solves our customers’ toughest challenges. From concept and commissioning to maintenance and modifications, we’re there every step of the way to keep your equipment operating safely, reliably and efficiently.

Bottom Ash Solutions


B&W ASH Hydrobin dewatering bin

Hydrobin® Dewatering Bin

Proven, reliable approach for dewatering bottom ash

  • Gravity-driven water/solids separation
  • Low initial cost, shortest lead time
  • No outage required for installation
  • Utilizes existing hydraulic transport system (no modifications to boiler)
  • Located remote from boiler, small footprint
  • Ideal for batch transport of bottom ash
  • Up to 72-hour storage capacity

Submerged Chain Conveyor  

Efficiently removes bottom ash from boilers burning solid fuels such as coal, bark, wood or refuse. 

  • Eliminates storage ponds
  • Removes material using less power
  • Uses less water to operate
  • Automatic ash dewatering
  • Less maintenance with fewer components
  • Easy access for inspection or maintenance

B&W Submerged Grind Conveyor

Submerged Grind Conveyor (SGC) System

Offers maximized results and minimized modifications to the existing footprint. 

  • meets zero-discharge bottom ash removal requirements
  • simplified and cost-effective system
  • offers flexibility in design to avoid disruption to operations and shorten installation time and costs
  • reduces conversion costs by retaining existing ash hoppers and boiler seal plates

B&W Remote Submerged Chain Conveyor

Remote Submerged Chain Conveyor

  • Eliminates storage ponds
  • Simple design for ease of maintenance
  • Flexible design allows multiple ash disposal options
  • Up to twice the storage time of a submerged chain conveyor system installed under the boiler
  • Located remote from the boiler
  • Easy retrofit to plant having an existing bottom ash slurry transport system

Request a Quote

B&W provides new build, parts and services.

Fly Ash Solutions


B&W Pugmill Recycler

Pugmill Recycler

  • Provides an economical way to recycle FGD water in the fly ash which is sent to the landfill for disposal
  • Minimizes fugitive dust during operation by using flexible isolation curtains
  • Optimal mix to avoid unabsorbed water in transport vehicle
  • Overlapping paddle configuration minimizes ash buildup
  • Nozzles specifically target mixing area with fine mist of water
  • Easy access for routine maintenance
  • Water meter and valve for precise water flow control

B&W ASH Vacuum System

Vacuum System

  • Uses air as transport media below atmospheric pressure to entrain and convey material
  • Vacuum source is located at the discharge end of the conveying system
  • Ideal for shorter transport distances (< 1500 ft)
  • Safest design for indoor and hazardous environments
  • Uses fewer components
  • Less clearance required under hoppers
  • Low initial system cost

B&W Vacuum/Pressure Combination System

Vacuum/Pressure Combination System

  • Used for long conveying distances where vacuum system benefits are desirable in confined or hazardous locations, then transfer to pressure system for long distance
  • Initial material discharge from hoppers is by a vacuum system
  • Requires an intermediate collection vessel/transfer station
  • Pressurized conveyance system to storage silo

B&W ASH Pressure System

Pressure System

  • Can convey over longer distances (1000 to 10,000 ft
  • Simpler ash/air separation equipment at the storage silo
  • Airlock is required to transfer material from collecting hoppers to high pressure conveying line
  • Lower cost silos and related equipment
  • Lower operating costs
  • Eductor-based pneumatic system available for special applications

B&W ASH Dense-Phase Transport System

Dense-Phase Transport System

  • Variation of pressurized system but operates at higher ash-to-air ratios
  • Smaller transport line sizes, for intermediate material transport rates, will often be the lowest initial and operating cost system
  • Long distance conveyance, same capabilities as pressure transport systems

Industries & Materials

Power and Renewables

  • Bottom ash
  • Fly ash
  • Solid fuels including coal, biomass, RDF and MSW
  • Reagent and byproduct (limestone, gypsum) of the wet FGD process


  • Wood chips, kaolin, pulp, waste paper, salt 

Steel and Metal

  • Ore, slag, coal, concentrate and mixtures


  • Powder, granulate, minerals and mixtures


  • Rock, gypsum, lime, soil, sand, stone and other materials


  • Salt, grain, oil seeds, mill projects

Other industries with free flowing materials

Related Resources

 Hydrobin Dewatering Bin

 Submerged Grind Conveyor (SGC) System *NEW*

 Submerged Chain Conveyor System

 RSC2 Remote Submerged Chain Conveyor

 Pugmill Recycler

Solutions for ELGs and CCRs


Allen-Sherman-Hoff®  Bottom and Fly Ash Systems

  • Submerged Grind Conveyor (SGC) System
  • RSC2™ remote submerged chain conveyor
  • Hydrobin® dewatering systems
  • Dry bottom ash conveyors
  • Vacuum, pressure and combination fly ash systems
  • DenseASH dense phase pressure system
  • Conventional fly ash and scrubber byproduct handling systems

B&W Loibl Conveyors

B&W Vølund Fuel Feeder Systems

New Build

Babcock & Wilcox (B&W) projects, new build
We consistently demonstrate the ability to successfully execute innovative solutions for our customers, from new equipment to large, complex full-scope engineering and construction projects.

Upgrades / Retrofits

Upgrades and Retrofits by B&W
Modifying, improving and maintaining existing equipment are vital considerations for the long-term viability and profitability of all operations.

Parts / Services

Babcock & Wilcox Parts and Service Support
An extensive network of worldwide regional service centers, field service engineers and technical support personnel are available to provide the customized service and aftermarket solutions for your requirements.

B&W's Diamond Power & Allen-Sherman-Hoff Brands

Boiler Cleaning and Ash Handling Business to Better Serve our Customers

The company and brand you recognize as "Diamond Power" entered the boiler cleaning business in 1903 and has operated as a Babcock & Wilcox company since 1922.  Today, B&W Diamond Power® boiler cleaning systems, while much more elaborate and sophisticated than they were a century ago, still serve the same purpose: to keep boilers operating at peak efficiency.

The reliability and efficiency of your operations is important to B&W. 

Trust that B&W will continue to offer the innovative and proven Diamond Power® technologies and support for products including boiler cleaning technologies such as IK™ retractable, HydroJet ® and other boiler cleaning systems / sootblowers.

B&W's Allen-Sherman-Hoff® provides ash and material handling solutions. As part of our complete environmental technologies line, we continue to provide a variety of ash and material handling solutions, from completely dry bottom ash handling to fly ash and petroleum coke processing. These technologies offer environmentally sound solutions to address wet FGD (scrubber) wastewater and mitigate ash storage ponds.