CHAIN GRATE STOKER

  MECHANIZED STOKING SOLUTIONS FOR DUST / ’CHURA’  COAL & LECO

Aarkay's Coal Stokers are of Chain Grate design and are suitable for forced or balance draft operation. The Stoker consists of an endless articulated grate, driven forward at uniform rate by an electric motor through a suitable gear system, the rate being varied by the use of a variable speed D.C. motor. Coal is fed at one end of the grate, the thickness of the feed being regulated by a heavy duty refractory-lined fire door. Air for combustion passes through spaces between the grate links which are arranged to provide adequate passage of air while allowing minimum passage of ridding (fine particles) through the grate.

The regulated layer of coal on the grate, as it enters the furnace, is heated by the radiation from the furnace gases and the ignition Arch. The fuel bed continues to burn as it moves along towards the rear end and as combustion progresses, the fuel bed becomes correspondingly thinner. At the end of the travel, ash is discharged over the end of the grate into the ash pit, as the assembly of links forming the grate surface passes over the rear roller.

Aarkay’s Chain Grate Stokers are suitable for all free burning bituminous coal having a top size of 5/8" with upto 35% through 1/8". The Stoker is capable of burning efficiently the coal having ash content to a maximum of 35% by weight and moisture to the maximum of 10% by weight. The Stoker design is based on coal having GCV of 5000 K. Cal. / kg. 

Aarkay’s Chain Grate Stokers are completely self supporting and can be placed on prepared Plinth / Boiler or a suitable fabricated support.

·          Automates coal/leco feeding into heater and ensures even and timely feed.

·          Enables use of cheaper dust coal.

·          Reduces fuel consumption by 15-20%

·          Easy maintenance with minimum downtime as system is on wheels.

·          Accurate and variable speed control system ensures a wide range of bed speed and feed.

·          Adjustable Guillotine door for regulating fuel feed.

·          Self lubricated rear roller.

·          Self clearing links with maximum cooling area ensures longer life.

·         Time tested and proven product with hundreds of installations all over India.

3'-3"