Hello,
I have a question regarding Power Recovery Turbine.
It is installed at the high pressure liquid side and produce electricity by letdown to medium pressure.
This Turbine is coupled to the pump and the scheme is as attached capture.
The point is that according to the utility summary, power...
Hello
I'm doing a new hydroprocessing project handling heavy residue fluid. From the Process Design, some valves are specified as flushing oil connections are necessary for those valves putting the oil continuously to prevent coke but the injection rate for each valves is not shown. (they are...
Hi, I'm chemical engineer working in a refinery.
I'm working on a revamp project which installing some new equipment in existing process.
New piping route will be added for it and the tie-in point is somewhere on discharge line of reciprocating compressor.
We are not modifying existing...
Hi,
I'm a project engineer working for a revamping project in a refinery.
In our company, there are several RDS process unit, which processes under about 200bar.
I found that some heat exchangers in RDS unit are breech lock type, which built 20years ago.
But some heat exchangers in other RDS...
Hi,
I'm a chemical engineer.
I calculated NPSHa to review increasing crude charge rate.
Usually the pump is run from 1 tank(there are 3 tanks), but during switching time another tank's nozzle open and the stream combines together.
Switch starts when the first tank's level goes down 3.7m and it...
Hi, I'm a chemical Engineer work in a refinery.
After a process unit construction, we found out that a pipe line is deflected like above pictures.
What I found through googlings, they say normally maximum piping deflection is 1inch or 1/2 of nominal pipe dia.
I checked my company's specification...
Hi, I'm working in a refinery.
These days, I'm studying about Steam Cracking.
In steam cracker, there is a heat exchanger called transfer line exchanger, which is different from S/T Heat exchanger.
It's design makes effluent and water/steam flow the same upper side.
I'm wondering why they use...
