4 replies to this topic

[process85]

Hi

I am designing a deaerator and BFW pumps system.Referring to the P&IDs of different plants i found that amine solution has been added at the suction of BFW pumps.
I think the need for adding amine solution is to increase the pH of Boiler Feed water.
But i feel cant we inject the amine solution in the deaerator itself instead of injecting it in suction line of BFW pumps.
Is there any particular reason behind this.

[Zauberberg]

There is at least one good reason to mix the amine with BFW at the pump suction, and that one is - to ensure efficient mixing. It's much better solution than simply adding it to the deaerator vessel.

[Mehrdad]

Hi

we add amin to deaerator tank and no problem is here.

for better mixing we use a spraying nozzle for amin.

amin act as oxygen scavenger and PH controler to preventing corrosion in boilers.

regard

[mohammadhosseinzadeh]

Hi

I am designing a deaerator and BFW pumps system.Referring to the P&IDs of different plants i found that amine solution has been added at the suction of BFW pumps.
I think the need for adding amine solution is to increase the pH of Boiler Feed water.
But i feel cant we inject the amine solution in the deaerator itself instead of injecting it in suction line of BFW pumps.
Is there any particular reason behind this.

Hi friend:
As Amine is volatile ,it should be injected outlet of dearator.

[Rahimzadeh]

<!--quoteo(post=22316:date=Sep 28 2008, 01:07 PM:name=process85)--><div class='quotetop'>QUOTE (process85 @ Sep 28 2008, 01:07 PM) <a href="index.php?act=findpost&pid=22316"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->Hi

I am designing a deaerator and BFW pumps system.Referring to the P&IDs of different plants i found that amine solution has been added at the suction of BFW pumps.
I think the need for adding amine solution is to increase the pH of Boiler Feed water.
But i feel cant we inject the amine solution in the deaerator itself instead of injecting it in suction line of BFW pumps.
Is there any particular reason behind this.<!--QuoteEnd--></div><!--QuoteEEnd-->




Hi friend:
As Amine is volatile ,it should be injected outlet of dearator.

I think in addition of reasons, the main function of amin is neutralising of co2 which my be produced in decomposition of bicarbonate of boiler water in high temperature.
best regards