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A coal burner (or pulverized coal burner) is a mechanical device that burns pulverized coal (also known as powdered coal or
coal dust Coal dust is a fine powdered form of which is created by the crushing, grinding, or pulverizing of coal. Because of the brittle nature of coal, coal dust can be created during mining, transportation, or by mechanically handling coal. It is a form ...
since it is as fine as face powder in cosmetic makeup) into a flame in a controlled manner. Coal burner is mainly composed of pulverized coal machine, host of combustion machine (including combustion chamber, automatic back and forth motion system, automatic rotation system, the combustion air supply system) control system, ignition system, the crater and others.


Mechanism

In the worksite, a coal burner works with the coal pulverizer and coal hopper usually. The coal in the hopper is conveyed to the coal pulverizer by screw conveyor. The coal pulverizer will crush the coal into pulverized coal. In the coal burner, the pulverized coal mixes with air (High-speed air flow is generated by the draft fan on the coal burner), and is ignited by the oil burning igniter.


Ignition

There are mainly two ways to ignite the coal burner. Manual way and automatic way, no matter which way it adopts, the coal burner often needs fuel (oil, gas, etc.) as the combustion medium. The difference is that the high-energy ignition devices which generate sparks replace people's hands.


Use

Pulverized coal burners have a wide range of uses in industrial production and daily life, such as providing heat for boilers, hot mix
asphalt plant An asphalt plant is a plant used for the manufacture of asphalt, macadam and other forms of coated roadstone, sometimes collectively known as blacktop or asphalt concrete. The manufacture of coated roadstone demands the combination of a numbe ...
, cement kiln, metal furnace, annealing, quenching furnace, precision casting shell burning furnace, melting furnace, forging furnace and other heating furnace or kiln.


Requirements for coal

* Mark of coal: bituminous coal; * Gross calorific value: ≥5000kcal/kg (≥ 20000kJ/kg); * Net calorific value: ≥4200kcal/kg; * Volatile matter: ≥25%; * Ash Content: ≤10%; * Total moisture: ≤35%; * Inherent moisture: ≤14%; * Total sulphur: ≤1%; * Particle size: ≤20mm. ''Note: These indexes are the lowest requirements for the coal, the better coal will be better at practice.''


See also

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Oil burner An oil burner is a heating device which burns #1, #2 and #6 heating oils, diesel fuel or other similar fuels. In the United States ultra low #2 diesel is the common fuel used. It is dyed red to show that it is road-tax exempt. In most markets ...
*
Gas burner A gas burner is a device that produces a controlled flame by mixing a fuel gas such as acetylene, natural gas, or propane with an oxidizer such as the ambient air or supplied oxygen, and allowing for ignition and combustion. The flame is ge ...
*
Pulverized coal-fired boiler A pulverized coal-fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal (also known as powdered coal or coal dust since it is as fine as face powder in cosmetic makeup) that is blown into the fire ...
*
Asphalt plant An asphalt plant is a plant used for the manufacture of asphalt, macadam and other forms of coated roadstone, sometimes collectively known as blacktop or asphalt concrete. The manufacture of coated roadstone demands the combination of a numbe ...
*
Boiler A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, centr ...
*
Portable stove A portable stove is a cooking stove specially designed to be portable and lightweight, used in camping, picnicking, backpacking, or other use in remote locations where an easily transportable means of cooking or heating is needed. Portable stov ...
* Burner (disambiguation) *
Heater Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality. HV ...


References


External links


PULVERIZED COAL BURNER
// Mech4840


Pulverised coal combustion (PCC)
{{DEFAULTSORT:Coal burner Burners Heating