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Typically if the process side foulant is ammonium chloride and bisulfide salts then water is sufficient in cleaning the exchanger when dealing with hydrotreaters. These salts are extremely soluble in water. A lot of hydrofiners have either continuous or intermittent water washes for coolers in...

Thanks for the info. This will be a horizontal vessel and the critical velocity has a lot to do with the sizing of the vessel but there are some other factors I am having to consider such as minimum distance between HLL and LLL (simply minimum distance b/t taps for control). Not using a...

I am sizing a 3 phase separator in a gas plant that receives cooled vapor and liquid hydrocarbon from the 1st stage of a compressor and also a sour water stream. The separator will then separate the hydrocarbon liquid, water, and vapor before sending the vapor to the second stage of the...

I assume that the exchangers you are using to generate the steam already exist? If not, why not just use a steam generator to produce the steam rather than using an exchanger as well as a drum? Otherwise,for sizing a vapor liquid separator first calculate the critical velocity of the 2 phase...

I'm not sure of the quality needed for your insulating oil, but SF6 has a boiling point of -63C so it is extremely volatile. I don't have any idea of the solubility of SF6 in typical hydrocarbons, but I would imagine that very little would stay with the liquid hydrocarbon if the solution was...

The reason I thought nozzles are typically placed on top of the equipment is so that fouling materials or solid objects cannot settle in the nozzle thus blocking the safety relief path.

We have had good experience with these coatings in two different services: 1) in water cooling exchangers we have applied the coating to reduce the fouling with great success on problem coolers (even in spots where the cooling water return temp is high, like 135-140F, where many foulants drop...

A pig can also be used in crude and resid furnaces to remove heavy coke deposits.

The amount of iso/normal paraffin mix is determined by the crude mix as well as some of the processing steps including the vacuum distillation and hydroconversion steps. The narrower the vacuum cut the better the quality and the more consistent the product. There are also some hydroconversion...

One thing to check is whether you have a high liquid level in the bottom of the column. If the liquid level gets above the gas inlet the column will flood and DP will increase. One problem that causes a high liquid level that might not show up in the level reading of the sight glass is if you...