Studies performed on a quenching unit we have indicate fluoride/chloride levels are significant factors in degrading the mortar and brick. Are there any cost-effective industrial methods for fluoride/chloride removal from a stream containing 4 ppm fluorides and other typical fluids found in...
I'm re-doing a small natural gas pipeline and wanted to use a typical two-part epoxy for the piping with a corrosion wax tape applied over fittings, welds, valves, and support sections to further reduce the potential of corrosion to those parts. Is this a typical use case for corrosion wax tape...
There are several mag drive pump manufacturers our company uses across several sites (Iwaki, Innomag, Ansimag, Finish Thompson)...
Do all these manufacturers provide some sort of niche or are they all just built to the same ASME or ISO standard? What are the primary differences between these...
Why are some spray nozzles designed with the external nose geometry flat vs. chamfered? My assumption was that turbulent eddies that might generate at the leading edge would be less turbulent with a chamfered edge. The application here is vertical hot gas being cooled by spray water coming...
Most manufacturers recommend against group trapping due to backpressuring of the separate legs and potential flooding / hammer.
Are there cases where group trapping is either possible or preferred? We have a trace system where there are a large amount of vertical nozzles requiring heat trace...
My apologies I thought you were talking about Ultramet. Could we potentially laser clad ultimet to the C276 to avoid a potential catastrophic failure if there were some unforeseen mechanism? Here's another picture of the pretty scaling on the nozzle for your troubles - keep in mind this was...
Haha I did. They don’t have experience bonding to C276 so there would likely be some experimentation and there’s no nice way to reduce tensile stresses on a vertically overhung nozzle. Or maybe there are but I’m not a structural/mechE by trade and it’s difficult to convince my company to put...
We could likely coat the rest of the nozzle with that material but the spray tip is the predominant failure mode. We believe the thermal shock from expansion would cause cracking with SiC / SiN
We have an injection nozzle supply water to a quench tower that adiabatically cools incoming gas from 2400 to 200 F. I am trying to calculate external nozzle temperature (not accounting for ash accumulation/oxidation of the surface) and am having trouble understanding how to confirm the...
Here are some images of uncleaned and cleaned lances showing how the corrosion products present. Usually colors are black, green, blue. Nozzle always show similar wear/corrosion patterns at the tip where weak sulfurous water (2% H2SO4, high chlorides/sulfides, 130 F). The spray cone itself...
The thermal spray coating that corroded catastrophically was a zirconia-yytria coating. It is believed that a combination of ferric/sodium chloride and sulfide build-up on the nozzle tip would cause a similar issue with zirconia.
We have a spray nozzle that quenches a hot sulfur dioxide gas stream from 2450 to 180 F. There is significant corrosion at the nozzle tip and fusion zones where the tip is welded to the pipe assembly.
Part of this corrosion is related to molten salt accumulation (na2so4, nacl, etc.) where...
I don't have an approximate cost on the skid system, etc. required to convert the heat from the compressors.
It's heat from approximately 200 HP oil-flooded rotary screw compressors. A rule-of-thumb I saw was 50K btu/hr per 100 cfm is recoverable so we'd be seeing approximately 400K btu/hr or...
Our condensate return systems aren't very complex and return to a common feedwater tank where chemicals are applied - this tank isn't kept under pressure and there is always a continuous vent of steam that leaves it in a maybe 20' long vent.
We have two air compressor waste heat ducts that are...
I’ve seen sparse details on the chemical compatibility of FeB coatings, especially when aqueous corrosion consideration when applied to high nickel alloys. Our process in a quench has both high temperature and dew point corrosion failures related to sulfuric acid with high chlorides.
Is there any public database that would detail an exhaustive list of testing/publications on various alloys and materials against green death solution?
We have a process that is disturbingly similar to green death and likely more corrosive. We've been evaluating various coatings to extend...
What level of training would be necessary to be able to effectively define requirements for a cost-effective route-based vibration analyzer?
I'm struggling to differentiate between all the different options for vibration analyzers. My manager believes a vibration pen or couple-thousand...
Vendor documentation for an oil-cooled rotary screw compressor in compressed air service indicates multiple flowrate-pressure data points at "full loading".
Assuming a temperature change of 10 F between the two values we would achieve 11% more volumetric flowrate going from 490 cfm @ 100 psig...
We have around 20 pumps that are relatively small in size (3600 RPM / 1800 RPM 6-12" impellers) that are used to pump bisulfite fertilizer and soda ash slurries. These currently use a single-pass flush of soft water that is pre-heated to 100 F via direct steam contact PRIOR to entering the...
