Typically these va ves are used to 'solate the coal mill from the boiler furnace and are normally kept open during service. They are c osed to iso ate the mill from the hot flames and gases in the boiler furnace during emergency shut downs and for routine maintenance. During normal operation, when the valve
3. Valves contain precisely machined parts and electronic parts that are sensitive to dust and moisture. Hence all valves shall be stored in dry indoor covered storage area protecting from foreign particle like, dust, mud, sand, coal dust, moisture, water etc., and extreme temperature variations. 4.
Ball Tube mills for pulverizing low-grade coal with high ash content from 30 T/ Hr to 110 T/ Hr catering to 110 MW to 500 MW thermal power stations ¾ Electrostatic Precipitators (ESP) Electrostatic precipitators with outlet emission as low as 17 mg/Nm3 (efficiency upto 99.97%) for coal
Bowl is made to rotate at medium speed for proper pulverization of coal. Springs exert necessary pressure on rolls for grinding. Hot air through the mill besides removing coal moisture picks up the lighter particles and takes them through the classifier and drop down the higher size particles for further grinding.
Bowl Mill has long been recognized as the most advantageous design of the coal pulverisers and include low initial cost, low maintenance cost, removal of tramp iron, low power consumption, easy maintenance, wide range output, quiet operation. The basic features of Bowl Mill (Puveriser) supplied by BHEL are: Medium speed range of 40 to 60 rpm.
Mill Steel valve turned to 90 in clockwise direction closes the valve and vice versa are used as MDV. Normally when the boiler and mills are in service the valves are in open position inside the pipe.
Bowl mills of slow and medium speed (for both pressurized & suction environment) for coal fired thermal stations with capacity from 10 T /Hr to 120 T/ Hr suitable upto 1000 MW thermal power stations. Ball Tube mills for pulverizing low-grade coal with high ash content from 30 T/ Hr to 110 T/ Hr catering to 110 MW to 500 MW thermal power
Beater wheel mills are designed to prepare a coal powder air fuel mixture for combustion in furnace chambers of coal-freed power plants by coal drying, pulverizing, classifying and transport.
Coal from travelling belt of raw coal feeder drops in central feed pipe ( connection between Raw Coal Feeder and Mill). After coal reaches Mill bowl grinding started and hot air also been given to make the pulverised fuel dried enough to classifier chamber. The portion of the coal which cannot be grinded finds its way to mill reject.
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01-04-2013· Bowl mills are very important auxiliaries for boiler units of thermal power plants, as they help to enhance the stability and efficiency of combustion process of coal by pulverization. This inadvertently increases the surface area of the coal, thus enhancing the
KSB MIL Controls Limited, with more than three decades of immense experience and unfailing customer satisfaction, has become the name to reckon with for the supply of critical Control Valves in the Process Industries in India & abroad with heavy emphasis on Thermal/ Nuclear Power, Oil & Gas, Petrochemical & Fertilizer sectors.
Routine, Breakdown, Preventive Maintenance and Annual Overhauling of 2x210 MW & 2x250MW Boiler Aux. such as ID/FD/PA & Seal air Fans, Bowl Mills, RC Feeders & Bunkers, Coal Valves,Mill reject Handling system, transportation/dumping of coal mill reject etc.