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There is quite a bit to unpack here, so I may need to deconstruct your question a bit. Your question is surrounding the fouling rate of a Shell & Tube (S&T) heat exchanger which I will get to, but there are a few things with respect to the RO that must be addressed. If you have sand in the feedwater to your RO, you have much bigger issues than heat ...


2

Omron makes a wide variety of industrial timer modules which can count down a preset number of tenths of a second all the way to hundreds of hours and then close or open a set of switch contacts and reset themselves. A new one from one of the on-line industrial supply houses might cost about 150 dollars new, or 20 to 40 dollars for a used one at an ...


1

It might help to consider this with the mind set of a primary metallurgist, not a chemical engineer. Primary metallurgist try to recover minerals, not chemicals, but they usually use chemicals in trying to do so. Most metalliferous minerals that are processed by primary metallurgists are sulfides. Sulfides of such minerals usually do not dissolve in water. ...


1

There are a lot of ways. To cut cost, reduce your expensive sensors to a bare minimum - probably just measuring what goes into the reactor. Controlling by mass tends to be expensive compared to by volume or pressure. Ideal gas law is your friend here. Pressure times volume is proportional to number of particles times temperature. It's pretty inexpensive ...


1

Physical location It depends. Ideally, every actutator(including hand operated valves) and sensor should have a unique identifier (Don't know the english term, the german terms are AKZ or KKS). These usually show up in the wiring diagram too. The identifying scheme changes from plant to plant, it is IME unusual to indicate physcial location - usually it's ...


1

Nitrile rubber (Buna-N) o-ring seals would be the most cost effective choice for your application. This is a valuable resource on o-ring seal design, for your case a dynamic rotary seal.


1

You are allowed to claim 2 BPCS IPL's but not from the same BPCS, eg you will need a PLC and a DCS with an IPL in each to claim both of them, plus they must be adequately independent. Additionally, you will be capped at a RRF of 10 for each, giving 100 for both, but that could be the difference between a SIL 3 SIF and a SIL 1 SIF in the SIS, potentially.


1

Without getting into the why of static and grinding, I think the problem always lies with these plastic bins that the grinds end up in. Glass would be much better. The simple solution which nobody has mentioned here, is to quickly dip a spoon in water and briefly stir the beans adding a few drops right before grinding. Problem solved. The more interesting ...


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