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from the Instrument department...
Sulphur flow measurement
Sensor technologies. topic
Posted by Mehdi Mirzaei on 22 June, 2011 - 5:00 am
Looking for a perfect flow meter for molten sulfur (including iron impurities) in a line with steam jacket.
We tried a magnetic flow meter but it did not work.


Posted by Walt Boyes on 22 June, 2011 - 11:39 am
There are two ways to do this measurement, neither of them perfect.

You can use a Coriolis Mass Flow meter or you can use a specially built transit time ultrasonic flow meter.

I believe Micro Motion, Endress+Hauser and Krohne have all done this measurement with Coriolis meters, and I know that GE/Panametrics has done this measurement for years.

Be sure that you provide accurate data, especially process temperature, pressure and flow rate, when you call your rep.

Walt Boyes
Editor in Chief
Control and ControlGlobal.com
555 W. Pierce Rd Suite 301
Itasca, IL 60143

wboyes@putman.net
www.controlglobal.com


Posted by David on 22 June, 2011 - 11:42 am
A differential pressure measurement with capillary connected remote diaphragm seals across a primary flow element like a venturi, orifice plate or V-cone.


Posted by d- on 23 June, 2011 - 7:45 am
magmeter in liquid sulfur, wow

what size meter?
flow rate?


Posted by SB on 23 June, 2011 - 10:51 pm
You Can use Wedge flowmeter for this. ABB has it for this specific application.

> Looking for a perfect flow meter for molten sulfur


Posted by Paul Hock on 24 June, 2011 - 7:05 pm
Many years back, we applied a helical rotor meter to a molten sulfur application. The PD meter was chosen because sulfur has a very bizarre viscosity curve. (It thins out after melting, but goes progressively higher in viscosity with temp.) The PD meter was insensitive to these swings and gave a good volumetric measurement. Max Machinery only makes the 1.5 through 3" sizes now. What is your flow rate? Can you be more specific on the iron impurity? Is there grit or nuggets, or is the iron just chemically present?

www.maxmachinery.com


Posted by d- on 25 June, 2011 - 7:31 am
@Max

mined sulfur or sulfur from sulfur recovery units in refineries can be high purity and may be what you measured.

these days sulfur comes from power plants, smelters, etc. with all sorts of contaminants, grits, etc.

for protection of the meter, and protection against freeze ups, you want no moving parts or obstructed flow path in the sulfur. Steam jacketed wedges work great, for smaller flows steam heated corolis meters are fine for very small pipe sizes where you can afford and have the room for the piping layout.


Posted by Mehdi on 26 June, 2011 - 3:01 am
> What is your flow rate? Can you be more specific on the iron
> impurity? Is there grit or nuggets, or is the iron just chemically present?

There is grit. flow rate is 19m3/h.


Posted by d- on 26 June, 2011 - 7:32 pm
the ABB flow wedges come in a steam jacketed version and are insensitive to grits and freeze ups.

the Coriolis meters in small sizes 1" or so are also okay but require careful piping layout and ussually fine for clean sulfur.

>> What is your flow rate? Can you be more specific on the iron
>> impurity? Is there grit or nuggets, or is the iron just chemically present?

>There is grit. flow rate is 19m3/h.


Posted by Mehdi on 27 June, 2011 - 3:42 am
> the ABB flow wedges come in a steam jacketed version and are insensitive to
> grits and freeze ups.

> the Coriolis meters in small sizes 1" or so are also okay but require careful
> piping layout and usually fine for clean sulfur.

Please tell me its model and some details.


Posted by d- on 27 June, 2011 - 8:57 am

http://www.abb.com/product/ap/seitp330/aca88a612466d79bc1257020005b c017.aspx

the chemical tee version

the steam jacketing is usually ordered separately from a supplier such as http://www.csiheat.com/

the jacket assembly and thermal cement is installed over the meter tube.

get the remote seal transmitters from abb, with fill fluid rated for sulfur temperatures.

no charge for internet searches


Posted by Mehdi on 28 June, 2011 - 5:40 am
What about KROHNE coriolis flow meter concerning pipe size (3inch) and iron impurities?


Posted by d- on 28 June, 2011 - 11:23 am
specify and purchase what you are comfortable with, once you buy it its up to you to make any choice work.

this forum is not good at sales pitching and negotiation but technical Q/A

good luck

>What about KROHNE coriolis flow meter
>concerning pipe size (3inch) and iron
>impurities?


Posted by bassman on 28 June, 2011 - 5:07 pm
We are working in the start up of an acid plant in Chile and are using a khrone ultrasonic flowmeter (UFM 3030)

If you need more information contact me in field-work-lcb@hotmail.com.

Best Regards
Luis Contreras B
Automation Engineer
Outotec

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