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Hi guys, Need some assistance on process design around a PHE I am looking to install. The HX serves to cool hot refined edible oil from 102 deg C to a nominal 45 deg C. The temperature of the outlet stream is not overly critical for any downstream processes, it is simply better for the quality...

Hi there, Am in the process of developing a design for new bulk caustic (50% NaOH) and sulphuric acid (98%) storage and handling systems.Both will be stored and distributed at ambient temperatures I am looking for a reference document that is useful to guide in the designs of these systems, or...

T09 is the vacuum dryer P09 is the pump http://files.engineering.com/getfile.aspx?folder=18b8dd98-7037-41be-be81-2d70354a3532&file=IMG_1699.JPG

Hey mate, Sorry for late reply. Still not resolved and still trying solutions. To respond to your questions: The vapour pressure for soyabean oil at 90degC is a mere 2.15kPa. The purpose of the dryer is not to fully evaporate a solution, its to remove the moisture from the oil. The oil is...

NPSHahttp://files.engineering.com/getfile.aspx?folder=515c58c3-00c7-47f1-8034-eba31cddd9da&file=IMG_1689.JPG

Hi guys, The issue was not actually solved as I excitedly indicated. We are still having issues. Attached is a photo of the installation. As already been discussed in this thread, the issue is not with the pump or NPIPr/NPSHr. I will attach the calcs in a separate post. We are still - however...

Sorted the issue this morning - an air purge on the discharge of the vacuum had accidentally been stroked periodically when a sparky was troubleshooting an actuated valve, causing a pocket of 6bar air in between the screw pump and the vacuum. We drained and bled the line and everything is...

Thanks for responding. Line is clear of debris and swarf, flushed the lines after construction with meshes at pump auctions. Temperature is 90 deg C and properties are accurate. The vacuum is designed to flash water from the oil, but obviously ot drop the pressure low such as to flash oil at...

Video of the pressure gauge fluctuationshttp://files.engineering.com/getfile.aspx?folder=d204e171-ca31-4e30-a7d2-82eb4f6e61bf&file=IMG_1667.MOV

Attached are tank specs (note operating level)http://files.engineering.com/getfile.aspx?folder=61f2df16-bc18-4c57-9139-86be8229d3fd&file=tank.JPG

Hi all, I am currently half-way through the commissioning of a new vegetable oil neutralisation plant. We are having issues with high surging on a particular progressive cavity pump on the discharge of an oil vacuum dryer. The dryer vacuum pump is sized to hold 100mbar, and evaporates entrained...

Molten - are you able to tell me the relationship? Thanks

Hi All, Looking for some assistance on a relationship/calculation to determine the caustic dosage rate required into a certain flow rate of acid water so as to neutralise it to a certain pH. If you refer to the attached sketch, it shows the parameters i am looking to get a relationship for...

Hi All, Looking for some guidance on the best materials to use for Sulfuric Acid pipework transfer, and diluted but low pH mixture. There are two operating conditions: 1) 98% Sulfuric Acid injection to a tank - ambient temp but tank is heated w/steam to approx 90-100 deg C therefore can...

Hi All, Looking for some guidance on the best materials to use for Sulfuric Acid pipework transfer, and diluted but low pH mixture. There are two operating conditions: 1) 98% Sulfuric Acid injection to a tank - ambient temp but tank is heated w/steam to approx 90-100 deg C therefore can...

Thanks LittleInch. Something I didn't point out but you may have noticed is there is also an actuated valve in place to introduce air to the system, depressurize it and drain residual oil though a drain line on the supply side of the tank. This is during the 'Emptying' process. The air release I...

Hi guys, With reference to the attached drawing from suppliers I have a vessel that is designed to retain oil and acid under pressure. The operating pressure is 6bar. The tank is bottom fed (supply line not shown) and discharged at height. On this discharge line you will see a safety valve, and...

On second thought, is there a chance of air lock between the pump and heat exchanger? In this instance, i think we should fit the ARV

My mistake on the PID symbol, definitely mean air release and not pressure relief. Realised after I posted The return line is top entry to the buffer tank as shown, at approx 4m and thus higher than the high level switch/level in the tank. Velocity in the line is 1m/s. I don't think aeration...

Hi guys, Currently we are installing a process plant that features a closed hot water loop. There is effectively an atmospheric holding tank, that loads out directly to the suction of a centrifugal pump discharging to the various process applications. The flow in the supply line not...