Air trapping through suction pipe w
Air trapping through suction pipe w
(OP)
Air trapping through suction pipe when switch off the condenser pump. During switch off all water reurened to the cooling tower, Cannot be possible to change the piping configuration. Thinking an idea by fitting NRV closed to cooling tower outlet pipe to hold the water in suction pipe during the off period. Pipe size 16 inch. Any other suitable ideas…find the approximated sketch





RE: Air trapping through suction pipe w
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Air trapping through suction pipe w
The back flow though must be accompanied by inflow of air from somewhere so try and stop that happening.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Air trapping through suction pipe w
RE: Air trapping through suction pipe w
RE: Air trapping through suction pipe w
The self-priming pump is less efficient energy wise and will also be more expensive to repair.
RE: Air trapping through suction pipe w
RE: Air trapping through suction pipe w
You haven't really given us much to go on here.
Please add some levels and dimensions to your sketch and explain how the operation works now or doesn't work.
Type of pump, how do you fill the pipe, how often does this happen, that sort of thing.
I assume your high point is above liquid level, but your sketch is a little bit too basic. ?if it's higher than the cooling tower liquid level then bimrs idea won't work, but your sketch is open to interpretation.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Air trapping through suction pipe w
Less expensive option (than a pump) is to use an eductor powered by air or steam to clear the piping.
https://cdn.wartsila.com/docs/default-source/produ...
Or use a priming system:
www.dezurik.com/download-file/apco-priming-valves-...
RE: Air trapping through suction pipe w
RE: Air trapping through suction pipe w
You seem to be approaching this issue in a bit part manner.
first off, you need to define your problem.
Is it that water flows back and overflows the cooling tower?
Or that you have difficulty on re-start?
Was it always like this?
Or has it just started?
Ha something changed?
find the P&ID and the operating procedure / philosophy to work out what should be happening
See if a HAZOP or other review was undertaken as to how the system should operate
Get a properly dimensioned route plan of the pipework.
Are there no NRVs in the system (e.g. on pump outlet?) Have they failed?
Where is the air coming from?
If you can fit an NRV, then why don't you?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Air trapping through suction pipe w
At the moment you are wasting your time as well ours and as LittleInch has advised, DEFINE the problem.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Air trapping through suction pipe w