THERMAL POWER PLANTS – CHAIN EQUIPMENT SYSTEMS

Coal & Alternative Fuel Feeding

• Apron Feeders & Drag Conveyors
  High-capacity feeders (~300–1 000 t/h) for coal, biomass, pet coke.
• Bucket Elevators
  Central-chain types for vertical transport to mills or bunkers, handling abrasive coal dust.
• Wagon Tippler & Track Hopper Zone

Rotary Wagon Tippler System (with Apron Feeder)

• Purpose: Discharge of bulk coal from wagons to track hoppers.
• Equipment: Heavy-duty Apron Feeders installed below hoppers.
• Chain Type: Forged link or round link chains; pitch > 250 mm.
• Features:
  • Designed for impact loading and high throughput (600–1200 TPH).
  • Replaceable wear liners on pans.
  • Shock-resistant drive units with overload protection.

Primary Crushing & Transfer House

Crusher House Pan Conveyor

• Purpose: Transfers crushed coal to bunkers or storage silos.
• Equipment: Deep Pan Conveyor with heat and abrasion-resistant chains.
• Chain Type: Central chain with drop-forged links.
• Features:
  • Steel apron pans for hot and sharp-edged coal.
  • High torque sprockets with hardened rim segments.
  • Capacity range: 500–1500 TPH.

Bucket Elevators (Coal Bunker Charging)

• Purpose: Elevate coal to bunkers or day hoppers from intermediate storage.
• Equipment: Central Chain Bucket Elevator or Round Link Chain Elevator.
• Chain Type: Central forged chain or round link per DIN 764/DIN 22252.
• Features:
  • Vertical lifts up to 60 m.
  • Dust-tight casing with inspection doors.
  • Buckets made of wear-resistant plate (Hardox or similar).

Pulverizer & Mill Feeding

Drag Chain Conveyor

• Purpose: Transfers coal from bunker to mill feed chute.
• Chain Type: Drop-forged or cast link drag chain.
• Design Features:
  • Sealed design to prevent dust escape.
  • Hardened flights and guide rails.
  • Equipped with anti-jamming interlocks.

Ash Handling & ESP

• Submerged Scraper Conveyors
  Chains with welded flights for bottom-ash removal; operates in abrasive, high-temp environments (up to 1 200 °C).
• Flow Conveyors / Flow Bars
  For ESP ash conveying—low-speed, dense-phase transport.

Submerged Scraper Chain Conveyor (SSCC)

• Purpose: Handles bottom ash from boiler hoppers submerged in water.
• Chain Type: Case Hardened steel twin-strand chain with steel scrapers.
• Chain Pitch: Typically, chain dia. And capacity depending on ash volume.
• Design Features:
  • Carbon steel scraper bars for corrosion resistance.
  • Reinforced chain guides for thermal shock resistance.
  • High reliability in 24×7 duty cycle operations.

Fly Ash Bucket Elevators

• Purpose: Transfers dry or conditioned fly ash to storage silos.
• Chain Type: Enclosed round link or central chain.
• Special Features:
  • Dust suppression liners.
  • Heat-treated buckets.
  • Seal rings to avoid air/dust leakage.

Flow Conveyor for ESP Dust

• Purpose: Conveys fly ash from ESP hoppers to ash handling system.
• Equipment: Low-speed enclosed Flow Conveyor.
• Chain Type: Drop-forged steel scraper chain.
• Capacity: 10–100 TPH (dry fly ash).
• Design Aspects:
  • Horizontal layout with minimum elevation.
  • Explosion-vent doors and dust-tight construction.

Ash Silo Discharge & Loading

Flow Conveyors + Telescopic Loading Spouts

• Purpose: Metered discharge from ash silos to truck loading systems.
• Chain Type: Drop-forged scraper chain in discharge conveyors.
• Components:
  • Flow conveyor discharging into loading chute.
  • Telescopic spout with dust sealing bellow.

Flue‑gas & Dedusting byproducts

• Drag‑chain Conveyors
  For FGD gypsum and desulphurization sludge—enclosed, low-spill systems around crushers or hoppers.

Chain Types Used Across Power Plant Applications

CONSTROMECH ADVANTAGES

• All chains manufactured as per DIN / ISO / customer standards.
• Forged components are heat treated, and hardness tested (up to 60 HRC).
• Systems engineered for 20+ years operating lifecycle with minimal maintenance.
• Local service and retrofit capability available for replacement chains and sprockets.