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

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

Basic Components of a Steam Power Plant Figure shows the basic components of a basic steam power plant Steam Figure. The basic components and their function of a steam power plant are : Steam boiler : In the boiler, the fuel (coal or oil) is burnt in presence of air. The heat energy released due … Read more