Pressure transmitters selection for a gasifier

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Pressure transmitters selection for a gasifier
May 16, 2008 2:31 am, by jackgrove
Subject : Sensors
from the Automation List dept.
Text :
I have to procure a pressure transmitter to mount on output of a gasifier (incenerator). Operating pressure is -20 mm WC & temperature is 1000 deg C. Gas contains 10% dust. What would be the length of the siphon requiered? Pipe size is 1000mm with 100mm thick refractory. Can anybody recommend Appliesens, Poland?
Reply

Re: Pressure transmitters selection for a gasifier
May 16, 2008 9:35 pm, by Roy Matson
Any of the major manufacturers can supply a transmitter to suit your application. I suggest a DP cell with a span setting of 25 or 50 mm. You will need to mount the transmitter in a cooler location and tube to your measuring point. I expect you will use quite a large pipe, e.g. 50mm to connect to your flue with a short length of 1/2" tubing to the transmitter.

The trick is to prevent the tube from plugging, but you must know how to do that.

Regards,
Roy
Reply

Re: Pressure transmitters selection for a gasifier
May 20, 2008 1:12 am, by Jack
Hello Roy,

Thanks for the reply. But could you elaborate on on this: "I suggest a DP cell with a span setting of 25 or 50 mm"? By span, do you mean the span of the pressure measured or something else? The pressure element is indeed a piezoresistive silicon cell. We were intending to use 50mm for connection to duct. Do you thing a diaphram seal can help to extend the life of the transmitter? I hope you will clarify.

Regards,
jack
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