coal pulverizer pdf

Pulverizer Operation Mode The suction operation pulverizers have a slightly higher explosion fre quency than pressurized pulverizers The trend is reemphasized by the coal type Subbituminous coals accentuate the difference Pulverizer Capacity Generally explosion frequency is independent of pulverizer capacity However

coal pulverizer or mill systems The studies showed that there is an emergence of low rank high reactive coals as a base fuel for power plants which is resulting in an increase in pulverizer system fires Also the EPRI study concluded that reducing the frequency of fires would reduce the risk of coal dust explosions Unfor

today there normally exists a combustible coal air mixture in the burner lines and pulverizer equipment Hence there is the continual danger of fires and under certain conditions explosions Proper design and operation of the pulverized coal burners protects the pulverizing system from ignition

capability can be used to increase the pulverizer and boiler capacity with the present coal or to maintain the present boiler load with a coal that is more difficult to pulverize At Danskammer the existing pulverizer capacity was increased by more than 15 percent while the coal particles larger than 50 mesh were essentially eliminated

the pulverizer throats and matching them for compatibility with the coal pipes and burner nozzle sizes is essential for the best furnace performance Furthermore remember that there will be minor variation in mill capacity fuel quality and mill inlet airflow rates that must be considered when sizing the pulverizer

Overhauling a Pulverizer for Best Performance Typical Triggers for a Pulverizer Overhaul • Prescribed maintenance interval hours tons throughput months • Noise Coal Rejects excessive Capacity Short • Repair damaged or worn parts grinding elements classifier components etc

Wabash Power Equipment Co• Tel 8007042002 • Tel 8475415600 • WEB SITE • Email info InStock Source for ReadytoShip Equipment Wabash maintains one of the largest inventories of reconditioned mills in the country in

This time however is dependent on various factors The heart of a pulverized coalfired boiler is the pulverizer also known as the mill Depending on speed pulverizers are classified as lowspeed mediumspeed and highspeed mills Pulverized coal burners may be located on the front or opposed walls or in the corners of the furnace

Pulverizers 101 Part I Every coal pulverizer is designed with a particular fuel grinding capacity or throughput at a certain Hardgrove grindability index HGI based on a defined raw coal size