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Anonymous Poster #1

Turbine Gland Condensor Vacuum Not Pulling

08/05/2014 3:14 AM

Hi All,We have a high capacity turbine which has a gland condensor which condensate outlet is of 2" without isolation valve with U bend for liquid sealing.Now that steam leackage from gland increases and loading on gland condesor increases and vacuum tend to positive side.we tried to maintain by adjusting the motive steam in ejector,trap checking,exchanger backflusing but nothing worked. Can anyone suggest any prabable reason and solution?.may the gland condesor is backflooding.Thanx in advance.

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#1

Re: TURBINE GLAND CONDENSOR VACUUM NOT PULLING

08/05/2014 3:19 AM

If it isn't already in the troubleshooting section of the User Manual supplied with the equipment then a few phone calls to the suppliers of the equipment and its component parts would be a far faster route to the solution than waiting on CR4 for either divine inspiration or for an Exocet from lyn. So pick up the phone and get dialling; that is what it is there for. Get someone in!

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Anonymous Poster #2
#2

Re: TURBINE GLAND CONDENSOR VACUUM NOT PULLING

08/05/2014 3:56 AM

A thousand "artistes" could fix this....

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Guru

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#3

Re: Turbine Gland Condensor Vacuum Not Pulling

08/05/2014 9:45 AM

Fix all of the leaks in the system so that the ejector can operate within it's design limit?

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#4

Re: Turbine Gland Condensor Vacuum Not Pulling

08/05/2014 3:05 PM

Gland steam condensers accept the steam sneaking past the shaft seals.

These condensers are necessary to prevent steam burns of personnel and to prevent the turbine hall from filling up with steam.

They also help prevent contamination in the turbine lube oil system.

Perhaps your seals are excessively worn and must be replaced ?

How much time has elapsed since the last seal replacement ?

Did your company just purchase this facility and have the seals been leaking for a long time ?

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#5

Re: Turbine Gland Condensor Vacuum Not Pulling

08/06/2014 8:36 AM

It sounds like your steam seal regulator is not operating correctly and you also may have worn HP and LP seals on the turbine shaft. 1st thing you have to do is shut down and fix your steam seal regulator. During startup it should hold 2 to 4 pounds of pressure on the seals. Your turbine manual explains how to set up the regulator. After checking out the regulator and insuring that it works correctly, then you should look at replacing the steam seals in the turbine.

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Anonymous Poster #1
#6

Re: Turbine Gland Condensor Vacuum Not Pulling

08/07/2014 8:26 AM

Thanx to all for concern,To bring down the turbine means billions of loss for now,we are waiting for the bi-anual maintenainece shut down to fix the seal and seal steam regulator.Mean time we wanted a fix for few months.

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#7

Re: Turbine Gland Condensor Vacuum Not Pulling

08/11/2014 7:09 PM

Your question has the answer, "...Now that steam leackage (sic) from gland increases..." You have already acknowledged that you are leaking too much seal steam, and as others have said, probably because of excessive seal wear/clearance.

You might consider increasing the condenser cooling surface area by fabricating an additional condenser and adding another high capacity vacuum pump to the system. The trick is how to cut that unit in with minimal interruption to your process. It won't stop the leaks but it might reduce the backflooding and increase the condenser vacuum to a more economical level.

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