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Thread: Automatic oil return system
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28-03-2008, 09:18 PM #1
Automatic oil return system
Hi there fellas
Just joined the site and i like what i see
I myself am getting into the industrial scene
What are some effective ways for automatic oil return on ammonia systems. I am well aware of the manual draining exercise but just wanted to know are there many effective automatic procedures????
look forward to the replies
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29-03-2008, 03:17 PM #2
Re: Automatic oil return system
Install a oil separator at the discharge then put auto drain under oil separator going back to your suction.
Guapo
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29-03-2008, 03:57 PM #3
Re: Automatic oil return system
Hi, matt watson
Welcome to RE forums...
yes there are.... but must be design within plant from beginning... modifications done later usually are not good...return of dirty oil from the last evaporator back to compressor suction can be very expensive sometimes....
.... good help is to install special self closed valves (with spring) for oil drain...
if you loose too much oil then you must search for cause ... automatic oil return will not improve/repair your problem/cause
.... little smell of ammonia will keep you awake and ever ready
Best regards, Josip
It's impossible to make anything foolproof because fools are so ingenious...
Don't ever underestimate the power of stupid people when they are in large groups.
Please, don't teach me how to be stupid....
No job is as important as to jeopardize the safety of you or those that you work with.
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29-03-2008, 04:12 PM #4
Re: Automatic oil return system
I have never heard of an automatic oil draining system on an ammonia system. At my company's facilities we have our oil traps set up so that we may use NH3 pressure to drain the traps into an "oil regenerator", a heated vessel where the oil and ammonia may be separated. (I do not know if there is another name for this separator vessel.) The residual oil is then either used as fuel in our boilers, or it is recycled.
On a personal note, I would recommend against an automatic oil drain system as it is very important to know how much oil is being removed from the system, and the quality of the oil being removed from the system may indicate serious problems such as moisture or even metal particles in the oil. An automatic system would remove your operators from this important information and might deprive you of the knowledge of troubles to come.Last edited by Oregon Jim; 29-03-2008 at 04:15 PM.
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29-03-2008, 05:37 PM #5
Re: Automatic oil return system
Just to clear up any possible confusion, let us understand what we are discussing.
We have refered to oil return on the discharge separator. This is essential on many machines.
Automatic draining of vessels back to a "Oil Still" is not uncommon. It also can be the source of many problems, as the first sign that it has quit working is that the evap fails due to oil logging.
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29-03-2008, 06:01 PM #6
Re: Automatic oil return system
Pardon me... I misunderstood.
"Oil still... I like that better than "regenerator".
On our discharge separators we have installed sight glasses in the lines so that we have a way of seeing what is being returned. I do not like relying too much on automatic anything. It makes operators less observant.
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29-03-2008, 06:24 PM #7
Re: Automatic oil return system
Hi,
Originally Posted by NH3LVR
.... automatic oil return is normal between compressor and discharge separator....
... also we can install oil pump with pipe system for charging and draining of oil, kind of semiautomatic operation... because we have to open and close different valves regarding what we are doing...but this is another story
Best regards, Josip
It's impossible to make anything foolproof because fools are so ingenious...
Don't ever underestimate the power of stupid people when they are in large groups.
Please, don't teach me how to be stupid....
No job is as important as to jeopardize the safety of you or those that you work with.
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