What is Travelling Grate stoker?
[′trav·əl·iŋ ¦grāt ′stō·kər] (mechanical engineering) A type of furnace stoker; coal feeds by gravity into a hopper located on top of one end of a moving (traveling) grate; as the grate passes under the hopper, it carries a bed of fresh coal toward the furnace.
What is Travelling grate?
Traveling grates are designed for the use of granulated fuels, treated or not, of medium size. The biomass used for combustion can have a high ash content and a medium-low percentage of humidity.
In what way is the supply coal fuel is done in Travelling Grate stoker?
In what way is the supply coal/fuel is done in travelling grate stoker? Explanation: The coal is fed by gravity from a hopper located in front of the stoker. The depth of fuel on the grate is regulated by hand adjusted gate. The speed of the grate varies at the rate at which the coal is fed to the furnace.
What is Travelling grate boiler?
A highly efficient and reliable offering for the combustion of a wide range of biomass/fossil fuels. Manufactured as per Technology developed by Thermax.
What do you mean by stoker fired boiler?
Stoker fired boilers are the smallest units among hard coal fired boilers. They are mainly operated in local or industrial heat or heat and power generating plants. RAFAKO S.A. offers OR type steam boilers, WR type hot water boilers as well as modernisation of the existing stoker fired boilers.
How coal is pulverized?
Pieces of coal are crushed between balls or cylindrical rollers that move between two tracks or “races.” The raw coal is then fed into the pulverizer along with air heated to about 650 °F (340 °C) from the boiler. The powdered coal from the pulverizer is directly blown to a burner in the boiler.
What is grate technology?
The incineration process converts waste into ash, flue gas, and heat. The type of thermal WTE technology most commonly used worldwide for municipal solid waste is the moving grate incineration. The hot combustion gases are commonly used in boilers to create steam that can be utilized for electricity production.
Which combustion system is included under feed stoker and grate firings?
fixed bed combustion
There are two prominent types of fixed bed combustion: underfeed stokers and grate firings.
What is the main disadvantage of spreader stoker?
Spreader stokers can burn any type of coal from lignite to samianthracite, whether they are free burning or cocking. Their disadvantage is that fly ash is more.
What is the advantage of stocking the coal in huge heaps?
What is the advantage of stocking the coal in huge heaps? Explanation: Coal is piled in heaps of 10 to 12m height on a concrete floor, by compacting it in the layers of 20 to 30cm thickness using bulldozers. This prevents air circulation in the interior of the heap.
What is chain Stoker?
: a wide endless traveling chain that feeds and supports the fuel in a boiler furnace.
What is the function of stoker?
Stoker, machine for feeding coal or other solid fuel into a furnace, usually supporting the fuel during combustion. A good stoker also supplies air for combustion and regulates the rate of burning and, in large installations, disposes of the ashes. Use of stokers affords substantial fuel savings over hand firing.