In my experience, you can use mild steel for H2SO4 as long as this is anhydrous. This means that you cannot freely vent or, more precisely, you cannot introduce water vapour into the tank. There are special vents in which ,I believe, air goes through a silica gel bed. A common practice calls for...
Put the other (right for me) way round :
0.57 m3 x 850 kg/m3 x 3.6 kJ/kg x 130 degK = 222,768 kJ
Add 5 % for radiation loss ---> 234,493 kJ/3600 = 65.13 kWh
So you need this kind of energy to heat to 150 degC; up to you to decide the time...
m777182,
Basically, we are looking at the same crystallizer... external recirculation - and thermal destruction - of fines you say, and I agree. Adding that the unsaturated solution should be injected in the best possible location, generally deep down in the vessel, since it is hot. The problem...
Probably different, but it may possibly help. I had an H2S + CO2 + HC pipeline not always dry as it should have been. The pipe was 310 ss. In some 6 to 7 years operation, no visible corrosion occurred in test spots.
Some troubles (but this was clearly a project bug) in a few carbon steel parts...
I can't add a comma to the good description of m777182. I would just remark that, if excessive nucleation is the problem (as it happens in manganese sulphate, for example) the solution might be of looking fromn the other side of the problem : since nucleation can only occur when supersaturation...
Basically I would follow the advice of DocMax. If you feel solid settling is an issue, I would be scared of the fouling of the PHE rather than the (crevice) corrosion of the carbon steel pipe.
A point that was not considered here is the pumping energy. Roughly, at 3 m/s you have 9 times the...
Film evaporators? would work fifteen seconds and plug. These are crystallizers, and forced circulation (external) to make the good old table salt - actually, not for the table, but for salt blocks -we call them pills, this side of the ocean - to be used in water softeners (mainly for...
rmw,
Not exactly : I am driving the recompression (via centrifugal compressor) using electricity generated with the GT (I am not brave enough to be the first to propose a directly coupled compressor for this application) and generating steam to operate the triple. Why triple? well, it's a...
Thanks, everybody. Just for your info, this is a project for a salt crystallizer : customer has a double effect producing some 27,000 MTPY, and I am proprosing to revamp to triple + mechanical compression to 60,000 MTPY, installing a cogeneration as above.
If ever it is made, I'll tell you...
Tks taylorg. Actually, consumption of both energy and steam is quite steady and 7/24, but there should be provision of a parallel board to interconnect with utility.
Diesel engine (converted to Otto) seems to have a relatively high low-temperature output with the cooling fluid, not really...
I am looking for gas turbines for a combined cycle unit, to produce steam for a multiple-effect crystallizer, plus mechanical (or electrical) energy for a steam compressor in the same crystallizer.
The problem is, I need some 10 MTPH of LP steam and the electric generator would be rated for...
Well, a good starting point would be to define the type of compressor to be used. For example, if you use centrifugal, you shall expect a maximum compression ratio of 2 (optimistic) per stage, meaning a 16 in a classic 4-stage, intercooled 1-motor unit. I am not familiar with carbon dioxide, but...
You may think of a precipitation of insolubles (e. g. precipitation of Mg using Ca(OH)2, then Ca using soda ash - it's a classic). Or you may consider crystallisation as in ZED plants. However, economics of these processes are much worse than RO : unless you have something poisoning the...
To my knowledge, hydrojetting is widely used in the phosphoric acid industry, where tubes and Ca sulphate scales are bread and butter. I believe pressures are up to 500 bar (75,000 psi), but this requires a safe knowledge of the use of the correct nozzles, or else.
I recently witnessed a...
Froma personal experience, on commercial HCl solutions (30 - 32 % w/w) I have used always PE (not necessarily reticulated) for small tanks below 30 °C, FRP (but choose the right resin) 30 to 70 °C. I presune reinforced PE to be an alternative. In one occasion I had to heat the HCl before the...
