Dr V T Sathyanathan

Boiler Pipelines Steam Blowing Procedure: Why and How

Steam blowing allows power station boilers and pipelines to ensure that during normal operation no adhering material in the superheaters, reheaters, and steam pipelines will become dislodged, reach the turbine blades, and damage them. Puffing and continuous methods are mainly used for steam blowing.

Oil Burner Throat – Reasons for Refractory Failure

Oil burner throat is made of refractory play a major role in the performance of the burner. Its damage leads to many problems during combustion and results in non-availability of the burner. The reasons for such failure are quality of refractory chosen and the way it is prepared and applied.

Bank Tubes in Process Boilers

Bank tubes in bi-drum boilers act as raisers and down comers between the two drums. They also carry the load of the bottom drum and its down comer. Failure in these tubes needs to be attended depending upon the type of failure and the location of failure.

Bi-drum and Single Drum Boilers

Boiler designers used four drums and three drums for designing water tube boilers during the initial days. Later as the boiler technology advanced in capacity and pressure, they switched over to bi-drum and single drum design.

Boiler Operation with Low Furnace Pressure

Low furnace pressure can cause equal damage like furnace pressurization or a explosion. Low furnace pressure leads to a situation called furnace implosion if not corrected at the right time. To correct a imploded boiler requires a very long outage and work to be carried out.

Drum Type and Once Through Boiler Design

As carbon emission is a major concern today, more super critical pressure units are bound to be preferred due to the increase in plant cycle efficiency. This will make once through type boilers take over from drum type boilers. Fuel conservation is an important factor for energy security presently.

Boiler Performance and Air Pre-heater Plugging

Air pre-heater plugging in a boiler results in lower boiler efficiency, higher power consumption, higher corrosion potential, longer downtime of the boiler, and higher erosion rate. Air heater plugging leading to very high pressure drop impacts availability of boiler partially or fully.