Is there such a device to trap and release any high pressure gas that could get into stream to storage (i.e. loss of water boot level in overhead receiver ) before it gets into the tank? I heard there is a "vapor trap" (don't know if this is the correct terminology), but my searches don't throw...
It has been asked if we can pull a Kerosene tank completely empty, all available product pumped out. I have heard that the product inlet nozzle should be kept submerged (level above nozzle height) beieng the reason the prevention of the product flasing in the tank. If this is a misconception or...
I get a bit upset when I ask a chemical reps about what would be their chemical ttreatment recommendation on for a new slop oil treatment system. The answer I get covers the basics such as this many pumps, heat source (sometimes), mixing source (hardly ever mentioned), type of chemical/dosage...
In our routine Safet checks, a Safety Shower was flunking the "bucket" test due to intermittency of flow of water. It was found that the main cause was "hardness" particles plugging the shower head spray nozzles and the eye wash internal tubing (& filters). Our recommendation is to flush the...
Has anybody used rotary lobe pumps in DAF units as sump pumps? Or any oil recovery service similar to a DAF Unit? The orignal pump was a centrifugal pump with an uplift of 64.7 ft and it never worked. Ever since we use air pumps one at a time and we have 5 of them. We just replace them when they...
From a PSV evaluation, it was determined that there are no applicable relief cases associated with a couple of PSV installed at the discharge line of a couple of small sampling pumps at a Blender system. From the study it was recommended to remove the PSV's from service. However, in order to...
How will you determine the maximum working level of a Butane (51.6 psia @ 100°F) storage tank (sphere) which has PSV's set a 100 psig? How will this level vary with higher vapor pressure (i.e. say you store material with a 72.2 psia)?
What have been your experience with Flare gas flow meters? Our refinery (2 Plants) has three flares and measures the gas going into the flares stack (GE Sensing) after Water Seal Drums. On the case of one of the Plants, on ocassions of events of high pressures, when both flare gas meters should...
I'm looking for information of refineries experiences handling ethanol-gasoline vapors from truck loading racks in their flare system, and the impact ethanol has in the operation of the waste water treatment plant. In some systems, these vapors will mix with water (in headers, FGR units, Faler...
New regulations will require to control the gas emissions from tanks with internal floating roof whenever they land the roof on legs. Are there systems presently in use to scrubb & destroy the emitted gases? IF so, what are they? Any references (Houston, California?)
Our Waste water equalization tanks floating roof design has a round sump 3 ft Diameter x 2 ft Height. It has 19 vertical slots 6 inches long x 1 inch wide. The problem that we have is that these slots get clogged up with trash thus interrupting the continuous oil removal operation. I'm looking...
This Delaval GTS pump is in sweet cat feed transfers service, and per our operators assessment, its operation is rough. By rough meaning a vibrating, ratling noise kind of operation. In order to attenuate the roughness, they start openning the spillback globe valve. This pump has a history of...
If a pumps is dead headed, how would you determine the time it would take to cavitate? How this time compares to reality? Could it cavitate inmediately?
J.Y.C.<br>You might want to check the "separators" section in Perry's Chemical Engineers'Handbook (see Index) which list a variety of them.<br>AIRBUS
