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Realtime Control Of Hydrate Formation
#1
Posted 15 September 2013 - 01:16 PM
#2
Posted 15 September 2013 - 02:06 PM
to estimate hydrate formation conditions
but you may utilize a soft sensor,
a soft sensor can be provided
installed in a little PC
which you may install in control room
or locally in GC cabinets etc.
soft sensors operate in realtime
exchanging data via OPC or MODBUS
interfaces (which are the standard
interfaces for industrial applications).
Typically you provide compositions
(from GC) and the soft sensor
calculates the required properties
the procedures are the same of simulators
and accuracy are equivalent.
I have utilized this,
http://www.prode.com...hydrocarbon.htm
which is capable to calculate hydrate formation
conditions with different amounts of inhibitors
Edited by marchem, 15 September 2013 - 02:09 PM.
#3
Posted 16 September 2013 - 03:30 AM
#4
Posted 18 September 2013 - 11:37 AM
as said by marchem,
with PRODE SERVER you can calculate in realtime hydrate formation conditions
(as well as many other properties as dew points, water condensation etc.),
however the software itself doesn't calculate the required amount of inhibitors,
instead,
if you specify an amount of inhibitor,
it estimates the conditions for hydrate formation.
#5
Posted 27 September 2013 - 06:09 AM
does PRODE SERVER calculate hydrates
plus hydrocarbons and water dew point ?
In their page there is a version which
could be installed in our DCS system.
Edited by neriet, 27 September 2013 - 06:10 AM.
#6
Posted 28 September 2013 - 07:20 AM
yes,
given the composition
you can get more than 30 different properties
including hydrates and
hydrocarbons + water dew point,
the main advantages of soft sensors
are that they don't require maintenance,
and can estimate many properties
which differently may be difficult or
expensive to measure with
traditional methods,
examples are hydrates formation,
true critical points etc.
Once you have filled the soft sensor
with required data (w,t,p) it calculates
all the required properties as
dew points.
bubble points,
densities , volumes,
heats of combustion etc. etc.
(see the list on above link)
but it could also be programmed
to control the operating of
colunns , compressors etc.
where a rigorous simulation is required.
The solution may require
a few seconds or less
(depending from the number
of properties to calculate)
so it's a realtime operation.
I know of one installation running
(without much problems) since 1998,
the software has been updated, though.
Edited by PaoloPemi, 28 September 2013 - 07:42 AM.
#7
Posted 18 October 2013 - 08:05 AM
#8
Posted 28 October 2013 - 09:48 AM
I know ProMax integrates well with PI. There was a plant I visited who had ProMax continuously running every 5 minutes to calculate their hydrate conditions. More specifically, it told them how much MeOH to inject. That may be another option for you.
#9
Posted 22 April 2014 - 08:34 AM
A bit late, but you may want to check: http://www.hydrafact..._hydrachek.html
#10
Posted 24 April 2014 - 01:30 AM
thanks AntoninC,
we have installed Prode Properties in DCS which calculates dew points plus
hydrate formation condition based on GC readings,
your solution, based on a specific sensor, looks interesting.
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