Since the plant is to be restarted on daily basis , The one option is to
install fin fan coolers so that excess steam during low demand or no demand
can be converted in to condensate & can be recycled to boilers.
Install a temperature control valve on dowstream of fin fan cooler to
control the flow based on excess steam flowing in to the fin fan cooler
>From: e-Director <segip@tm.net.my>
>Reply-To: <a href="/group/PipingDesign/post?postID=ZjofB2ppC2wbxTBWzSun_Ow3O8CvPdv67IY51WLh4YaVtAO0FlWbWCREiahyoIP1WGE4TlGg-N5YFcy6qYFvR1-6">PipingDesign@yahoogroups.com</a>
>To: <a href="/group/PipingDesign/post?postID=ZjofB2ppC2wbxTBWzSun_Ow3O8CvPdv67IY51WLh4YaVtAO0FlWbWCREiahyoIP1WGE4TlGg-N5YFcy6qYFvR1-6">PipingDesign@yahoogroups.com</a>
>Subject: Re: [PipingDesign] Fw: [STM] Shutting Down a Steam Distribution
>System
>Date: Sat, 23 Nov 2002 10:28:57 +0800
>
>Boiler operation is always a critical issues... Nonetheless, maybe you
>could preserved the entire system with N2........ The system is purge so
>that no moisture or water vapor or water contain inside the system.....
>
>Purge the entire system with N2 until the dewpoint reach -40°C...
>
>This may help in preserving the boiler operating conditions and the
>passivation film inside the boiler and inside the piping system..
>
>Make sure the dew point is always below -40°C during the entire shutdown
>period.... inject more nitrogen if the dew point is below -40°C..........
>
>
>
>
>
>----- Original Message -----
>From: "Paul Bowers" <pbowers@pipingdesign.com>
>To: <PipingDesign@yahoogroups.com>
>Sent: Saturday, November 23, 2002 1:08 PM
>Subject: [PipingDesign] Fw: [STM] Shutting Down a Steam Distribution System
>
>
>Forwarded from the Steam List:
>
>----- Original Message -----
>From: "Gil McCoy" <McCoyG@energy.wsu.edu>
>To: "'Steam-List'" <steam-list@lists.cc.utexas.edu>
>Sent: Friday, November 22, 2002 10:10 AM
>Subject: [STM] Shutting Down a Steam Distribution System
>
>
> > I received this inquiry from an electrical utility auditor over the
> > Department of Energy's OIT Information Clearinhouse line. I'd
>appreciate
> > any advice or recommendations....
> >
> > REQUEST NARRATIVE:
> >
> > We are updating some studies done for a Navy base. They have a steam
>plant
> > but rather then a central steam plant for whole base it is there to
>provide
> > steam for the ships. The steam plant is staffed 24/7 even though the
>ships
> > are there only 1/3 of the time. They run the plant continuously to keep
>the
> > steam line hot, even when there isn't any load there for it. They have 6
>to
> > 7,000 feet of steam line. How do you shut it off and bring it back up on
>a
> > regular basis? They're not sure what the issues are. A report done
>earlier
> > talks about filling the system with nitrogen. Surely schools must run
>into
> > this with shutting down for the summer. And since food processing is
> > seasonal wouldn't they have the same issues? They must have steam lines
>hot
> > and then not hot for a period of time. What do schools and food
>processing
> > plants know? The operators are concerned there might be some damage to
>the
> > system in not running it. The are ok on the boilers, but not sure about
> > impacts to the piping in the steam system. The fear is that the system
>will
> > corrode and the seals will dry out, then when you bring it back up
>you'll
> > have lots of problems. Any assistance would be helpful.
> >
> >
> > Gilbert A. McCoy
> > Energy Systems Engineer
> > OIT Clearinghouse
> > (800) 862-2086
>
>
>
>
>Discussion List sponsor: Texas Flange - a good source for information on
>industrial flanges, all they ask is for referrals for designs they help
>with.
>877-610-8924.
>www.texasflange.com
>=====================================================
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>Somebody email this guy: <a href="/group/PipingDesign/post?postID=iyfJdCQs--JnV94hpzeXt74fz6DjPsINAn2cPF65R7WRLt-rIX86dCVDfvUeQGt4AVhcAwgU6gSExoi6">RAMESH@ALPHADXB.COM</a>
>
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>
>
>
>
>
>Discussion List sponsor: Texas Flange - a good source for information on
>industrial flanges, all they ask is for referrals for designs they help
>with.
>877-610-8924.
>www.texasflange.com
>=====================================================
>unsubscribe: <a href="/group/PipingDesign/post?postID=CTFhQSyzYzBNR7GQKcr1FDKzJ60cWjsyeWdnY0JV0n3LWxhXtwh8FrQigpnt11wf-e12_jRVZuAXMpGGgBgY9W_F29ALhJ_UvULtdJIndPLXdA">PipingDesign-unsubscribe@yahoogroups.com</a>
>=====================================================
>Somebody email this guy: <a href="/group/PipingDesign/post?postID=iyfJdCQs--JnV94hpzeXt74fz6DjPsINAn2cPF65R7WRLt-rIX86dCVDfvUeQGt4AVhcAwgU6gSExoi6">RAMESH@ALPHADXB.COM</a>
>
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