3 2 coal pulverizermill system one of the critical power plant components that is relied upon to convert the energy stored in coal into electricity is the coal pulverizer or mill the coal flow is controlled by the feeder allowing coal to flow into the pulverizer mill the pulverized coal and air mixture is then transport to the boiler
Get PriceThe sketch below illustrates the location where throat velocity must be >7 000 Fpm to prevent raw coal spillage Pulverizer throats that are too wide will have a correspondingly low vertical velocity jet which contributes to coal rejects and fires Objectionable quantities of coal rejects are shown to the left
Get PriceIn Appendix 6A we show a calculation taken from Musto 1978 for the primary and secondary air required for coal pulverizer with 4 5 metric ton per hour 10 000 lb/h coal feed rate at initial moisture of 15 percent which is required to be ground and dried to 2% with a 200 HP mill
Get PriceA scraper for a pulverizer is provided to prevent wear of a rotating unit by distributing load applied to the rotating unit over a shaft and a loader member by adopting a simple beam type support structure A scraper 10 combined with a rotating bowl in a pulverizer pulverizing charcoal into fine particles to transfer discharged materials to a discharged material hopper is composed of a
Get PriceClaims 2 Hide Dependent 1 Bull ring for the rotating table of a coal pulverizer characterized in that a body of cast steel is fastened to the upper portion of the rotating table and a chromium carbide alloy is bonded to the upper surface of the cast steel body to form the contact surface with the pulverizing elements of the coal pulverizer 2
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Get PriceA pulverizer or grinder is a mechanical device for the grinding of many different types of materials For example a pulverizer mill is used to pulverize coa
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Get Pricefineness Optimum raw coal feed size for EL pulverizers is ¾ to 1 Raw coal feed should never exceed 1¼ raw coal this size can plug throats and cause vibration Raw coal that is too fine can plug the pulverizer or delivery components upstream of the pulverizer Regular yard crusher inspection and
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Get PriceHarder coals require this type of pulverizers 2 Impact and Attrition Type Coal is fed into a rotating cylinder containing steel balls of around 50 mm diameter When the cylinder rotates the balls rotate along with the cylinder and fall down when they reach the top position Coal is ground due to attrition and impact
Get PricePieces 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 As the coal gets crushed by the rolling action the hot air dries it and blows out the usable fine coal powder to be used as fuel
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Get PricePulverizer capacity is the amount of coal a pulverizer can grind at a given raw feed rate to a given fineness at a certain Hardgrove Grindabilty Index HGI and at a specific raw fuel
Get PricePulverizers coal pulverizer are used to pulverize pieces of coal into fine particles 100μm before placing into a boiler to ensure efficient combustion Pulverizers have three functions pulverization drying and classification The classification function plays the important role of ensuring that only fine particles of the pulverized coal
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