Recent content by scorcher

Hey, Does this type of scan work for packed columns?? Thanks

Phenols are easily digested in a standard bio plant to 0 levels. They are easily digested at these concentrations

Hi, I am looking for an efficient way to re-use packings form a tower contining 98% H2SO4. Removal of old packings is by vacuum, while replacing them must be carried out by hand. TO avoid handling acid comtaminated packings, we dispose of teh old packings and replace with new ones. Does...

Gents, Thanks for the advice. Radar was my first choice, but although they are the gauge of choice at our site too, we have seen problems with un-even surfaces (tank volume turned over 5-10 times per hour in this case) Stilling wells are the obvious answer, but surface scale and corrosion...

Hi, Jet engines are a long way from my line of work, but this similar thread thread995-85538 might be relevent. You stated the problems with brand new engines. Perhaps the problem is to do with a change in the cleaning regime (even seasonal changes here) I know this is off the stratification...

Hi, I am looking for are replacement level instrument for 96-98% H2SO4 in a tank with high turn-over and water addition. The current air bubblers (used for indication) tend to fail regularly due to the tubes blocking with corrosion products. THe new isntruments are part of a control system and...

We are trying to use conductivity in preference to pH measurement (approx 13pH). However, process fluctuations are resulting in conflicting results and poor control. Conductivity is maintained well, but corresponding pH less so. Lab trials had not given any sigh of this issue. Conductivity...

6748, I know of a similar plant which generates SO2 (and acid as a byproduct). From talking to people at the plant I have learned 2 things. 1. They use liquid sulfur, stored above 135C but still "expect" to have some moisture in their sulphur.(the tank is open vented, I am not sure if they...

6748, I know of a similar plant which generates SO2 (and acid as a byproduct). From talking to people at the plant I have learned 2 things. 1. They use liquid sulfur, stored above 135C but still "expect" to have some moisture in their sulphur.(the tank is open vented, I am not sure if they...

All, Thanks for all the help. We have trialed modified tee (PVDF wiht steel support). Early indications seem encouraging. We will be upgrading the other strength meters following a longer successful trial. Regards

http://www.processassociates.com/process/convert/cf_all.htm

Moltenmetal, To elaborate, the equipment is an instrument tee (sound velocity/acid conc). Exposure to acid is constant, conc constant to +/- 1%, operating temp in range 50 to 80C. Instrument is installed in a 1" branch off a process tank circulation line, pressure up to 4 barg, so...

Hi, I am trying to source information on the suitability of PVDF (piping) with hot (up to 100C) 90-98.5 sulphuric acid. Information I have found so far gives the full range of "suitable" to "not suitable". I know that the temperature itself is OK, but am looking for clarity...

Is there a consistent definition of ullage? E.g., if a tank is quoted as 100m3, is this the absolute volume, the mechanical design volume to a level, or the maximum liquid in normal operation. Which of these figures does ullage relate to. Similarly for reactors, if it is quoted as 10,000l...

This is what we use on site for TSA. NICKEL-COPPER ALLOY (MONEL 400) SEAMLESS ANNEALED PIPE MADE TO ASTM B 165. N04400 (N1/CU) SCH40S or ASTM F423 (PTFE) OUTER API gr.B SC40. LINNER ASTM D1457 TYPE I If you are still interested, I can check what we use on our PTSA plant? Perhaps you could...