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smpsmp45
13-05-2008, 11:22 AM
One Suggestion form the Operator on a Ammonia Plant with @ 400KW Capacity ( -40 DegC).

As per his experience, it is better to put a OIL pot for the Pumps near the Suction. During the Shut off his vews are Some Oil does settle in the Pump Inlet area & can cause some serious problmes eventually.

Any experience on this?

nh3wizard
13-05-2008, 02:35 PM
I'll PM you

Grizzly
13-05-2008, 06:48 PM
I'll PM you


Nah NH3.
Personally I would love to learn from your wisdom.
Or is it to convoluted for a post?
Grizzly

nh3wizard
13-05-2008, 07:08 PM
highly complex or intricate and occasionally devious

smpsmp45
14-05-2008, 07:45 AM
Dear NH3Wizard,

Many thanks for the reply. I shall get the feedback from Site & his views. May be I shall contact you once again if needed.

nh3wizard
14-05-2008, 02:32 PM
Anytime smpsmp45

US Iceman
14-05-2008, 03:33 PM
Another issue that could contribute to this is the actual vessel design. The pump suction lines are usually projected up into the vessel several inches. The reason for this is to allow the oil to collect in the overhead vessel so that it can drain down into the oil pot.

Having said that, it is conceivable that some oil could collect in the pump itself over a period of time for an inactive pump. One way to deal with this is to activate the stand pump every so often to clear it of oil.

US Iceman
14-05-2008, 03:36 PM
highly complex or intricate and occasionally devious


I'm confused. What is this supposed to mean?

smpsmp45
15-05-2008, 11:17 AM
Dear US ICEman,

ou have a good point there. Can you throw more light on this. What should be the length protruding inside?

US Iceman
15-05-2008, 02:24 PM
2-4"

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Sorry for the short reply right now. I am having problems submitting any longer for some reason.

nh3wizard
15-05-2008, 02:29 PM
I'm confused. What is this supposed to mean? I was referring to Grizzlys post, I had to look up the definition of "convoluted" which is "highly complex or intricate and occasionally devious":D

kelvin_27_84
15-05-2008, 05:31 PM
Like wat iceman says the dry suction pipe is project up a few inches away from the vessel cap. But in Singapore we actually drill a 5mm hole just at the dry suction pipe area to drain off the oil just to the bottom of the vessel. we will then create a 1/4' pipe just at the lowest point of the vessel and then attach the oil pot there.

RANGER1
16-05-2008, 10:37 AM
Hansen technologies also shows a good example in its handbook . Look up Hermetic pumps