I want to know complete information about keeping vacuum inside Condenser, why and how it accomplish?

Let me know also about Gland Steam Condenser, why we use it inside power plant? Why we keep eyes on Gland steam pressure and temperature?

Help !!

 

kk1989,

Try this:

http://articles.compressionjobs.com...ines-control-back-pressure-condensing?start=5

It was found by typing:

"gland seal"

(with the double quotes) into the Search field of an Internet search engine.

 

The gland steam condenser removes waste steam from the turbine glands(seals). It is pumping under a vacuum to remove the waste steam, usually about 10 inches negative pressure. Loss of the pump (or it's components) will result in higher seal/gland pressures, usually associated with loss of condenser vacuum, or higher last stage temperatures, specifically L-2 blade pass temps.

 

Vacuum in the condenser allows steam exhausting from the turbine to have a lower pressure place to go. Without this lower pressure, the steam would not flow through the turbine at all. As the back pressure in the condenser rises, the flow through the turbine is restricted, thus reducing output, and overheating the last turbine stages.
Condenser vacuum is usually maintained by external cooling water flowing through tubes, isolated from the steam side-removing exhaust heat from the turbine exhaust steam, and carrying it away to the environment. (No need to discuss the implications of reheat turbines here)

As for the Gland Steam Condenser, This device collects exhaust waste steam from the turbine steam seals. It primarily is a heat rate enhancing device, recovering waste steam from the turbine seals, condensing it, and returning it to the condensate system.

As such, connected to the turbine seals, it can have serious impacts to turbine operation in the form of higher steam seal back-pressure, potentially impacting turbine thrust during transient load operations.

All of this is very basic steam turbine operation.
What turbine mfg do you have?