Category Archives: Mechanical

Unit Startup Procedure in Sub-critical Tangential Firing Boiler

Want to know about the various processes involved while starting a unit? Then you are at the right place because we have stuffed all the details involved in the start-up of a Sub-critical Tangential Firing unit. Below we have explained the start-up procedure types and various processes involved in case of tangential fired sub-critical boiler […]

Boiler Drum & Auxilariers

Boiler Drum is a very crucial part in case of Sub-critical boilers. It is cylindrical in shape and situated at the top of the boiler. In Super-critical units, water is directly converted into steam so drum is not required, but in case of subcritical boilers, the whole water quantity is not directly converted into steam. […]

Oxygen Analyzer in Boiler

Large thermal power plants generate electricity by using the thermal energy of fuel. Most of the power plants are pulverized coal fired boiler that means thermal energy is generated by the combustion of pulverized (crushed) coal.In order to control the combustion process,every power plant has their Burner Management System/FSSS(Furnace Safeguard Supervisory System) system,but Optimum efficiency is […]

Both ID(Induced Draft) FANS TRIP

Specific cause: Fault in the HT Motor Supply failure to feeding Bus Low Lube Oil Pressure (tripping of pump, low Oil level, Oil leak etc.) / High bearing temperature of motor/Fan bearings due to Lube Oil System Failure. High Bearing Vibration Process Failure (Cooling Water failure to the motor / Discharge Damper Closed) Control Room […]

Deaerator & FST

In our previous articles, we have explained you the Water Cycle of thermal power plant. This Water cycle consists of Feed Water Cycle and Condensate Water Cycle. Condensate water cycle is from Condenser to the Deaerator and feed water cycle is from Deaerator to the Boiler Drum. Impact of Dissolved gasses in Feed-water It is an utmost necessary […]

Unit Startup Procedure for Subcritical Corner Fired Boiler

Want to know about the various processes involved while starting a unit? Then you are at the right place because we have stuffed all the details involved in the start-up of a Sub-critical Tangential Firing unit. Below we have explained the start-up procedure types and various processes involved in case of tangential fired sub-critical boiler […]

Boiler Protection (FSSS)

New generation thermal power plants are larger in capacity and having sophisticated firing systems, which are more expensive. So it has become necessary to have a coordinated fuel burner management system. Why Boiler Protection System? Inside the furnace, for ignition purpose we generally use HFO (Heavy Furnace Oil), LDO (Light Diesel Oil) and Coal as […]

Condenser in Thermal Power Plants

Thermal Power Plant is based on the Rankine cycle and in Ideal Rankine cycle, there are 4 processes and those are Heat Addition at Constant Pressure  in Boiler, Isentropic Expansion in Turbine, Constant Pressure Heat Rejection in Condenser and Isentropic Compression in Pumps. So now we will discuss about the condenser, which plays a very […]

Ash Handling Plant

When the Coal combustion takes place in the boiler, some part of the coal remains unburnt and that un-burnt particles are called the Ash, which is approximately 26% to 40% of the total coal undergoing combustion. Basically this is nothing but the residual part of the coal. This ash will be extracted out in the […]

Boiler Pressure Parts

In the boiler, the feed water and steam flows through the different parts where the pressure is much higher than the atmospheric pressure. These parts are generally known as Boiler Pressure Parts. Mainly the heat addition to the working fluid (Water) is done through these pressure parts. Following are the boiler pressure parts: Boiler Drum […]

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