Coal handling stages hiren patel
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There are several stages in the coal handling process at a power plant: 1) Coal is delivered by rail, road, or ship and unloaded. 2) The coal may then be prepared through processes like crushing or grinding. 3) The coal is transferred to storage areas using conveyor belts or other equipment. 4) Coal is stored in piles or bunkers until needed. 5) In-plant equipment then moves the coal to furnaces where 6) weighing and measuring ensures the proper amount is fed to boilers for 7) furnace firing to generate power.
Coal handling stages hiren patel
- 1. BY HIREN PATEL MBA-POWER MANAGEMENT
- 2. COAL HANDLING STAGES 1. Coal delivery 2. Unloading 3. Preparation 4. Transfer 5. Storage 6. In plant Handling 7. Weighing and Measuring 8. Furnace Firing
- 3. COAL DELIVERY From the supply point the coal may be delivered to the power station through 1. Rail – Goods Train 2. Road – Dumper Trucks 3. Sea – Ships and pipelines Ropeways are also used if mines are near.
- 4. UNLOADING The type of coal unloading equipment used in the plant depends upon the type of out-plant handling mode as road, rail or ship. The unloading equipment normally used is given below: i. Portable conveyors ii. Coal towers – unload rail wagons iii. Unloading bridges – beams to unloads cargo from ship iv. Self unloading boats
- 5. PREPARATION If the coal when delivered is in the form of lumps, the coal preparation may be carried out by: i. Breakers ii. Crushers iii. Coal accelerators - fractures the coal iv. Dryers v. Magnetic separators vi. Coal Grinders or Coal Pulverizer
- 6. TRANSFER ‘Transfer’ means the handling of coal between the unloading point and the final storage point from where it is discharged to the fire equipment. The following equipment may be used for transfer of coal: 1. Belt conveyors 2. Screw conveyors 3. Vee bucket elevators and conveyors 4. Pivoted bucket conveyor
- 7. TRANSFER Cont… 5. Grab bucket conveyors 6. Flight conveyors or chain type conveyors( or scrapers) – heavy weight and moisture and dust contain coal 7. Skip hoists 8. Mass flow conveyors 9. Chutes, hoppers
- 8. STORAGE OF COAL The following points should be considered: There should be no standing water near the storage area. Well-drainage ditches should be installed. Storage area should be solid and not loose or porous. Piles should be built up in successive layers and as far as possible compact. Conical piling should be avoided. handling cost is minimum. At storage site fire fighting equipment is mandatory. ‘Live Storage’ is a covered storage provided in plants, sufficient to meet one day requirement of the boiler. Bunkers made of steel or reinforced concrete are used to store the coal; from here the coal is transferred to the boiler grates.
- 9. INPLANT HANDLING It may refer to any one of the following: i. Coal handling between the final storage and the firing equipment. ii. A conveyors system to feed coal from any bunker section to any firing unit and to move coal from one bunker section to another. iii. Inplant handling may mean no more than chutes to direct flow into individual firing units and gates or valves to control the flow.
- 10. WEIGHING AND MEASURING For weighing and measuring the coal at different stages the following equipment is used: i. Weigh bridge ii. Belt scale iii. Automatic scale – sensors and measuring instrumentation
- 11. FURNACE FIRING The two most commonly used method for the burning of coal are 1. Stoker firing 2. Pulverized fuel firing
- 12. BIBLIOGRAPHY www.google.com Text book of Power Plant engineering by R.K.Rajput www.astralloy.com http://www.indiamart.com/shubhamcorporation/coal.html http://indianpowersector.com/power-station/thermal-power-plant/ http://chanda.nic.in/htmldocs/coal.html
- 13. THANK YOU!