Let's assume that the heat input to a blocked-in vessel is known (e.g., calculated from a known external area assuming a pool fire). Note that the vessel is completely full of liquid (that is, could essentially be considered as a wide spot in a pipeline). Let's also assume (setting aside any...
I'm looking for Freundlich isotherm data for granular activated carbon for volatile organics, especially the lighter liquid hydrocarbons(e.g., n-hexane) that one might find in refinery amine solutions prior to regeneration. Can someone please recommend one or more sources of data? I have some...
I'm looking for Freundlich isotherm data for granular activated carbon for volatile organics, especially the lighter liquid hydrocarbons(e.g., n-hexane) that one might find in refinery amine solutions prior to regeneration. Can someone please recommend one or more sources of data? I have some...
I'm looking for Freundlich isotherm data for granular activated carbon for volatile organics, especially the lighter liquid hydrocarbons(e.g., n-hexane) that one might find in refinery amine solutions prior to regeneration. Can someone please recommend one or more sources of data? I have some...
I believe there is a rule of thumb for the flow of open steam in an application where steam is used to strip off the lighter/lower-boiling hydrocarbons from a multicomponent hydrocarbon mix (e.g., prefractionation prior to desulfurization in a coking plant). However, I can't recall what that...
To do some screening in a very short feasibility study, I was thinking of using the Fenske equation to get a handle on the minimum number of discrete stages in a refining steam stripping operation (specifically, stripping off hydrogen sulfide from an oil stream). Glancing at the equation in any...
Here's the situation: given a total installed cost, it's pretty well established that for the mythical average project, about 10% of that TIC accounts for engineering. Now, two questions:
1. What fraction of that engineering cost is covered by process (chemical) engineering?
2. Is it a...
Most if not all those who post/read here are familiar with the various compilations of equivalent lengths and K values (either the Crane single K, the Hooper two K, or Darby three K method) for evaluation of pressure drop through pipe and fittings. As such, I'm sure that everyone is aware that...
I'm looking for a consensus/recommendation for technology for monitoring the oil/water interface level in a storage tank (dimensions: ~140 ft diameter x ~50 ft high) that contains mostly water but has a relatively shallow (6" - 18") layer of oil floating on top. Naturally we're talking about a...
Suppose there's a need to insulate an existing API storage tank in, say, a refinery in the northeastern United States. This tank is approximately 125 ft in diameter x 50 ft high, and we're talking about insulation to minimize steam consumption for freeze protection/maintenance of a minimum...
I need guidance/recommendation for specifying a grounding CHAIN (yes, I said "chain", not cable). This would be installed in an atmospheric vessel that will contain molten sulfur. The point is to ensure that the potential between the nozzles where the molten sulfur enters by gravity and the...
I have a situation where there may be sonic flow of (50 psig saturated) steam in a (2") pipe. This would occur rarely, but it would be useful to be able to estimate the noise level at some distance from the pipe. Can someone please provide the appropriate equation(s) and/or point me toward the...
This question involves ongoing practices with respect to supplying snuffing steam to sulfur storage tanks. According to NFPA 655 (2001), if used, snuffing steam should be provided at a rate of 8 lb/min per 100 ft³ of EMPTY tank volume. For a tank measuring 30 ft OD x 16 ft high, that amounts...
Everyone knows the Colebrook equation for the (Darcy) friction factor (OK, multiplication by a constant yields the Fanning friction factor, but it's the same thing). Many would probably recognize the correlation between the Karman number and the friction factor: the Karman number is defined as...
Here's the issue: let's say we have a turbine using steam at some known inlet condition that has a known nameplate horsepower rating. Assuming the shaft coupling fails (i.e., the turbine is disconnected from its load so that it spins freely) but the steam supply remains intact, is there some...
Recently, I became aware of an entity called the Flügel equation which (among other things [?]) can be used to calculate the enthalpy of steam exiting a turbine. Perhaps I know of this equation by a different name but until I see it (or see another name for it), I can't be sure.
Can someone...
Does anyone know of a source for a correlation for friction factors in natural-draft stacks and chimneys, particularly small (let's say 2 ft and under) diameters? I've seen the charts in Perry; naturally, those are rather small and not particularly spreadsheet-friendly. (This was also posted in...
Does anyone know of a source for a correlation for friction factors in natural-draft stacks and chimneys, particularly small (let's say 2 ft and under) diameters? I've seen the charts in Perry; naturally, those are rather small and not particularly spreadsheet-friendly.
Does anyone have a rule of thumb for the portion/fraction of the bottom-line purchase price for process equipment in general (e.g., pressure vessels) that accounts for the labor involved in fabrication of such equipment?
Does anyone have a spreadsheet with or a link to M&S plant cost index data for the years 1976 to 1984, inclusive, as well as the first quarter of 2004 (sorry; don't have a recent issue of Chemical Engineering handy)? I have M&S data for 1985 through 2003 inclusive in hand. Thanks.
