Deepakkumar Yadav
Deepakkumar Yadav Oil Burners Usually the oil burners are required to be used for small capacity boilers for industrial use. The purpose of an oil burner is to receive supply of oil, meter it according to the load on the plant, atomise and vapourise the oil completely. The mixing of oil with air is so provided that … Read more
Classification of Pulverized Coal Burners Various types of coal burners are : Vertical long fame burners. Turbulent or short flame burners. Tangential burners. Cyclone burners. 1. Vertical Long Flame Burner : Vertical long flame burners as shown in Figure A are also called as U- Name stream lined burners. Figure A shows the arrangement of … Read more
Pulverized Coal Burners The Pulverized coal can be burnt with less or excess air similar to the burning of liquid or gaseous fuels. The method of obtaining the pulverized coal has been discussed in the previous section. Here we are concerned with the required burners for burning the pulverized coal. The various requirements of pulverized … Read more
Pulverized Coal System The pulverized coal system is used now a days for big power plants of capacity 100 MW or more. The coal is pulverized in order to increase its surface area, thus, promotes the rapid combustion (like burning of gas) without the need of supplying much of excess air, consequently, it results into … Read more
Pulverized Fuel Handling System There are two methods of delivering the pulverized coal to the furnace as follows : Unit system. Bin or central system. 1. Unit system : Figure A In case of unit system, each furnace of the plant is fired by its own pulveriser connected to burner while in case of bin … Read more
Advantages and Disadvantages Pulverized Coal System Advantages of pulverized coal system : Any type of coal can be used since it is used in powdered form. Combustion is almost complete, therefore it has high combustion efficiency and high rate of steam generation. It can generate upto 2000 tons of steam per hour. Greater surface area … Read more
Underfeed Stokers and its Types The principle of operation of underfeed stokers is shown in Figure A. Figure A In case of underfeed stokers the air and fuel move in the same direction . Air is supplied through the holes in the grate and it comes in contact with raw coal. Then it passes through … Read more
Capacitances Potential Dividers Q. Explain With neat diagrams, why are capacitance voltage dividers preferred for high ac voltages measurement ? Q. With a neat sketch explain trigatron spark gap used in impulse generators. Are ideal for measurements fast rising voltage and pulses. Capacitances resistances is independent of frequency if their leakage resistances is high enough … Read more
Regenerative Cycle and its Advantages & Disadvantages The practical regenerative cycle involves the bleeding the steam at suitable points during the expansion of steam in the turbine and using this bled steam for heating the feed water in feed water heaters. A feed water heater is a heater exchanger consisting of tubes through which the … Read more
Effect of Thermodynamics Variables on Efficiency and Output of Rankine Cycle Following are the thermodynamic variables which effect the efficiency and work output of a Rankine cycle : Superheating of steam Boiler pressure or pressure of steam at inlet to turbine Steam pressure at exhaust or condenser pressure or back pressure of steam. The influence … Read more