Lime Handling Systems

United Conveyor Corporation has over 30 years experience designing Lime Handling systems for wet scrubbers, dry scrubbers and fluidized bed boiler (FBB) applications. Our pneumatic conveying systems include truck and rail unloading, bulk storage, and silo-to-silo conveying designed for each specific application. The optimal solution will depend on the selected lime material, specific plant requirements (distance, routing, storage, etc.) and potential impact on the existing fly ash conveying system. UCC’s extensive knowledge of particle characteristics and flow behavior, plus experience with various material, including limestone, pebble lime, hydrated lime, and magnesium oxide, results in a reliable, cost effective solution.


  • Dense, medium and dilute phase conveying systems
  • Wet and dry scrubber applications
  • Fluidized Bed Boiler (FBB) injection applications

Bulk Truck and Rail Unloading:

  • Designed for on-board truck/rail or stationary blower
  • Fast unloading rates up to 30TPH on standard vehicles
  • Booster systems maximize unloading rate up to 60TPH with increased conveying distance
  • Fast unloading means quicker turnaround of vehicles and greater plant efficiency


  • Bin/Silo solution based on material and flow characteristics to eliminate rat-holing and arching – guaranteeing proper flow from silo to feeder
    • Flat bottom or truncated cone with fluidizer
    • Conical bottom with vibrating bin discharger
    • Welded steel, bolted steel or concrete construction


  • Precise feeding to match application need; rotary vane feeders, loss-in-weight/gravimetric feeders, volumetric feeders, full-load/no-load pneumatic control, airlock feeders
  • Patent pending, abrasion-resistant ceramic design provides superior wear life to maintain reagent feed accuracy in coarse limestone applications


  • Engineered splitter system designed to resist clogging and provide best possible distribution into each injection port
  • Optimal blower selection for power efficiency, total cost of ownership and system reliability

  1. Is there a difference in pneumatic conveying requirements for the different types of limestone and other reagents?[+]
    Yes, the material density and particle size distribution of various reagents will affect the pneumatic system design.
  2. Does build-up occur in reagent pneumatic conveying systems?[+]
    Buildup can occur depending on the percentage of moisture in the reagent. In every case, UCC systems are designed to minimize plugging from excessive moisture and to maximize cost savings by reducing slip. Material variability (density deaeratability, particle size and shape, velocity/loading, hardness) and system design (arching and rat-holing indices, material sources) can also affective system performance. A proper evaluation of material selection, conveying velocities, pipelines size and routing is critical to overall performance.
  3. How can reagent affect the fly ash handling system?[+]
    Reagents react with SO2 and SO3 to form calcium sulfates and sulfites. These irregular shaped particles can drastically alter the material characteristics of your existing fly ash, thereby affecting its flow properties and performance of existing hoppers and conveying pipes.
Pipe Landing2Pipe/Fittings
– Nuvaloy, Durite, Expansion Joints, Connections
Gates and Valves Landing2Gates/Valves
– Swing Disc, 40D
Tanks and Vessels Landing2Tanks/Vessels
– Silo Level Probes, Storage Bins