Dear all
In a Steam Cracking unit there are Sulphur spec for feedstocks. However sulphur mercaptans don't have, at least at the majority of the plant I know, specification.
Do the sulphur mercaptans crack? Are they converted to H2S completely?
Are they totally inert to the caustic scrubbing...
Dear all
We have recently switched 3 complete cells of our Air Cooled Condenser system.
The old ones were cut and new ones were welded.
The test that is being done (before plant startup) is a positive leak test.
We pressurize the system up to 500-700mbar (design pressure) and check pressure...
Dear all
We have recently switched 3 complete cells of our ACC system.
The old ones were cut and new ones were welded.
The test that is being done (before plant startup) is a positive leak test.
We pressurize the system up to 500-700mbar (design pressure) and check pressure loss.
However...
Dear all
I would like to have good information regarding Process Plant Comissioning & Startup.
I will be deeply involved in a Steam Cracker major revamp.
I already have the book Process Plant Comissioning but I would like to study and compare different approaches.
It's not our first big...
Dear all
I would like to have good information regarding Process Plant Comissioning & Startup.
I will be deeply involved in a Steam Cracker major revamp.
I already have the book Process Plant Comissioning but I would like to study and compare different approaches.
It's not our first big...
Dear all
Does any know, for ethylene and propylene, the h(T,P) function without chart/table interpolations?
I'm doing an energy balance to put in the DCS to the operators regarding centrifugal ethylene and propylene compressors.
Since the first stages discharges are internally mixed with the...
Dear all
Does any know, for ethylene and propylene, the h(T,P) function without chart/table interpolations?
I'm doing an energy balance to put in the DCS to the operators regarding centrifugal ethylene and propylene compressors.
Since the first stages discharges are internally mixed with the...
Dear all
I'm having some difficulties to understand what in reality is acceleration head.
I'm designing a system to pump hydrocarbon (gasoline) to another header with a reciprocating pump.
Without acceleration head calculation I have a NPSH of 84m. Considering it I have -5m because the line...
Dear all
I'm a chemical not mechanical engineer...
How can I re-rate a heat exchanger to change its design conditions?
Actually, design temperature s 150ºF but this is the operating temperature of the new service.
See thread 124-195840
Regards,
AndreChE
Dear all
I want to reuse a heat exchanger to solve a plant problem by cooling a heavy hydricarbon with CW but I might have a problem with it.
Its design temperature is 149ºC (300ºF) and operating temperature of the hot fluid is 155ºC. With the pipe layout and length I was able to estimate a...
I want to reuse a heat exchanger to solve a plant problem by cooling a heavy hydricarbon with CW but I might have a problem with it.
Its design temperature is 149ºC (300ºF) and operating temperature of the hot fluid is 155ºC. With the pipe layout and length I was able to estimate a 5ºC...
Dear all
Our Raw Gas Compressor, in an ethylene plant, has been experiencing lower compression ratios in two stages when compared to previous operation, before plant shutdown.
Rotors and impellers are switched every 5 years. The removed rotors are sent to Dresser Rand for recovery and previous...
Dear all
Where can we find the KOCH-GITSCH DESIGN MANUAL?
I am specifically interested in literature about distillation trays design, efficiency and performance.
Besides Kister's books, which other(s) can I read and consult in order to perform tray calculations?
My focus in this moment is...
Dear all
My company will revamp its 1,3-butadiene plant and we will be responsible for the basic engineering.
Unfortunatelly, Zeon and some other experienced companies with extractive distillation declined the job due to other bigger projects ongoing.
My team intent is to simulate the plant...
Dear all
My company will revamp its 1,3-butadiene plant and we will be responsible for the basic engineering.
Unfortunatelly, Zeon and some other experienced companies with extractive distillation declined the job due to other bigger projects ongoing.
My team intent is to simulate the plant...
Dear all
My company will revamp its 1,3-butadiene plant and we will be responsible for the basic engineering.
Unfortunatelly, Zeon and some other experienced companies with extractive distillation declined the job due to other bigger projects ongoing.
My team intent is to simulate the plant...
Dear all
Our C2 and C3 Splitters are with very high DP.
For the C2 Splitter, we have checked all the pressure profile along the column and we know in which section the flooding is located. We were suspecting ice/hydrates but we collected greenoil in the bottom level indicator nozzle.
The...
Dear all
Our C2 and C3 Splitter are with very high DP.
For the C2 Splitter, we have checked all the pressure profile along the column and we know in which section the flooding is located. We were suspecting ice/hydrates but we collected greenoil in the bottom level indicator nozzle.
The column...
Hello everyone
Does anyone have Pyrolysis Fuel Oil burning in Ethylene Cracking Furnaces? or fuelgas and FOP mixed burning?
We are planning site expansion and probably we won't have market for all PFO. PFO burning question in furnaces was raised but anyone knows a plant with such kind of...
Dear all
We have been operating our steam cracker for 5 years and the turnaround was delayed one year due to a plant revamping preparation.
I, as a process engineer, am responsible for the compressor follow-up. Suddenly, in the last two months the first two (of five) stages have been loosing...
