chain grate stoker [ ′chān ‚grāt ‚stōk·ər] (mechanical engineering) A wide, endless chain used to feed, carry, and burn a noncoking coal in a furnace, control the air for combustion, and discharge the ash.
What is a chain grate stoker for a boiler?
A chain grate stoker is a form of mechanical grate stoker for a furnace, consisting of an unending chain that spins and drags solid fuel into the stove. What is a boiler grate, specifically? The grates are designed in such a manner that air may enter and burn the solid fuel. What Is Your Definition Of Chain Grate Stoker?
What is the difference between chain-grate and travelling grate stokers?
Over-fire air injection and a high furnace (8) The travelling-grate stoker is similar in general appearance and operation to the chain-grate stoker except that individual grate bars or keys are mounted on carrier bars which extend across the width of the stoker and are attached to and driven by several parallel chains.
How do the grate bars of a stoker work?
The shearing action of adjacent grate bars as they pass around the curved supporting member at the rear of the stoker provides a self-cleaning action for the grate bars. (3) Thus the supply of air to various sections of the fuel bed may be adjusted to suit the combustion requirements.
What is a stoker on a steam boiler?
A mechanical stoker is a mechanical system that feeds solid fuel like coal, coke or anthracite into the furnace of a steam boiler. They are common on steam locomotives after 1900 and are also used on ships and power stations. What does a stoker do?
How does the chain run in travel Grate Stoker?
How does the chain run in travelling grate stoker? Explanation: The chain travels over two sprockets. In both chain type and in bar type stokes. One sprocket is placed at the front end and other sprocket is placed at the rear end of the furnace.
What are the two types of stoker fired boiler?
Travel Grate Stoker Solid Coal Firing.
What is grate of boiler?
Boiler Furnace Grate A furnace grate is provided in a steam boiler furnace for supporting the solid fuel in the furnace. Grate is so designed that it can also allow air to admit air in the solid fuel for combustion.
What are the various types of stokers used for coal firing?
Also called Mechanical Stokers.Travelling Grate Stoker.Chain Grate Stoker.Spreader Stoker.Vibrating Stoker.Underfeed Stoker.
What is stoker coal used for?
Steam coal refers to coal used in boilers to generate steam to produce electricity or for other purposes. Stoker coal refers to coal that has been crushed to specific sizes (but not powdered) for burning on a grate in automatic firing equipment.
What is Stocker fired boiler?
Stoker-fired boilers are used in many applications with thermal capacities below 50 MW. In these boilers, the fuel is fed by a stoker onto the grate, where it is ignited by heat from the refractory above. As the fuel travels down the grate, it continues to burn, with primary air coming from below.
What is the function of grate?
Grates are provided in solid fuel boilers to help with the fuel-burning such as biomass or coal. It is designed to enable the passing of air for combustion.
What is grate?
transitive verb. 1 : to reduce to small particles by rubbing on something rough grate cheese. 2 : fret, irritate. 3a : to gnash or grind noisily. b : to cause to make a rasping sound.
What is grate technology?
Grate combustion is the best-proven thermal waste treatment technology for mixed municipal solid waste, and the heart of any modern, state-of-the-art energy from waste (EfW) plant.
What are the principles of stokers?
Explanation: In under feed type of stokers, the fuel and air move in the same direction. In this stoker air after passing through the holes in the grate comes in contact with the raw coal. As air diffuses through the bed of raw coal, it mixes with the volatile matter generated by the raw coal.
What are the different types of mechanical stokers?
There are three types: the over feed, the under feed and the cross feed. The over feed delivers coal on to the top of the coals already in the furnace in the manner of a human working a shovel.
Where exactly are mechanical stokers used?
Where exactly are mechanical stokers used? Explanation: Mechanical stokers are usually used in large and medium capacity plants. Mechanical stokers are used to fire almost all kinds of coal.
What Is Your Definition Of Chain Grate Stoker?
A mechanical stoker is a mechanism that feeds solid fuel into a steam boiler’s furnace, such as coal, coke, or anthracite. After 1900, you widely utilized them on steam locomotives, as well as ships and power plants.
What Do You Have Of Chain Grate stoker Design?
The stoker’s primary goal is to feed a consistent amount and thickness of fuel into the furnace while maintaining a constant speed.
How Is The Working Of Chain Grate Stoker In Water Tube Boiler?
With a chain grate-type stoker system, it is able to burn bituminous coal-washed singles or smalls efficiently. This combination is ideal for industrial heating and process steam. Water tubed boiler-type water barrier combined with two-pass fire tube scotch seafaring vessel form a two-pass hybrid boiler vessel.
What are the maintenance systems of the chain grate boiler?
For chain grate boilers to operate safely and reliably, specific maintenance systems must be in place. This section will cover the chain grate boiler maintenance systems.
