2 replies to this topic

[theoneajit]

Dear all,

In an application for heating slurry the dry saturated steam from Boiler has been used with STHE. The pressure is reduced with PRS from 10 kg/cm2 to 3 kg/cm2,I would like know the need of using the desuperheater for this system.As, I understand the desuperheater is mainly used for superheated steam but as we reduce the pressure there may be a need of taking superheat from steam even for dry saturated steam. I discussed with many people and they are recommending not to use desuperheater.

Kindly comment on the above topic. I would like to know the reason for having or not having desuperheater for this application.

Thanks,
ASB

[SSWBoy]

Dear all,

In an application for heating slurry the dry saturated steam from Boiler has been used with STHE. The pressure is reduced with PRS from 10 kg/cm2 to 3 kg/cm2,I would like know the need of using the desuperheater for this system.As, I understand the desuperheater is mainly used for superheated steam but as we reduce the pressure there may be a need of taking superheat from steam even for dry saturated steam. I discussed with many people and they are recommending not to use desuperheater.

Kindly comment on the above topic. I would like to know the reason for having or not having desuperheater for this application.

Thanks,
ASB

I am not entirely sure on your application, but if there is a chance of the cooler fluid polymerizing or other temperature related fouling then a desuperheater will be used to help reduce the wall temperature in the exchanger. Bear in mind that with a desuperheater you will still remain within say 20F of the actual steam dew point.

[Padmakar Katre]

Dear your application seems that you need to remove the solvent from the slurry. Just check the temperature drop from PRS to the actual user. But if the same 3 Kg/cm2 steam is going to be used in reboiling somewhere then you definately need a desuperheater to extract the degree of superheat.