02/12/2018 Q: Why anion resin exhausted before cation resin in ion exchange water treatment?
13/03/2018 Q: We have kerosene hydro bone unit (desulphurization unit) , we faced technical problem which is non-improving (WSIM) water separometer index modified specification .
what is the mean thing that effect in (WSIM), and how can we improve it?
By the way, the reactor system of kerosene hydro bone unit is isolated.
09/12/2017 Q: I am interested in the forum's experience on (full) reusing of processing condensates from conventional Natural Gas / LPG steam reforming Units (from all major licensors). I have experience with an ex-KTI (Technip) based NG SMR whereby process condensates are fully a) fully reused in the BFW system post a simple air stripping for removal of dissolved CO2 and b) steam produced (at 40 barg) is used for both internal needs and export to other process user and a steam turbine / generator. The system operates as such successfully for many years. I understand that recent designs (and at higher steam pressures) call for either a) the steam not to be exported or b) a dual steam raising system one for internal consumption (where the process condensates can be recycled) and another for export steam on clean BFW. This, due to issues with organics difficult to be removed from the BFW and generated in the shift reactors.
Any experiences / views on this ?
13/11/2017 Q: I have question regarding the Reverse Osmosis membranes (RO) and we use anti scale chemical for the RO unit , please could you tell me what will be the effect if we inject the anti scale over rate injection and under rate as well? Is there a specific test to do for this chemical (anti scale ) to find out the optimal performance?
11/07/2016 Q: We are facing a problem due to the high content of phenol in LPG treatment spent caustic. Due to this high levels, we are having problems to discard this to the wastewater system.
I do not expect to have such levels of phenol (over than 5000 wppm) in a caustic solution used only to treat LPG. Is it normal to have high phenol content in these type of spent caustic? The sulphides level is lower than this.
31/05/2016 Q: Our client has recently started processing heavy crude slates from Western Canada. They are having an issue with their Desalter Brine Treatment Unit (BTU, which is a pre-treatment plant for oily solids removal before being sent to the de-oiling train) with higher than design temperatures and light hydrocarbon carry over. Does anyone have experience with this issue? Is steam stripping prior to BTU an option for dealing with this issue?
10/02/2015 Q: Why is caustic added in the SWS column?
25/10/2014 Q: For boiler feed water production we use lake water. I am interested to which lab methods are available for determination of humic and fulvic acid in water. Which filters are the best for their removal?
27/05/2014 Q: How could I simulate a Boiling Feed Water dearator on PRO II. flash drum? distillation column?
13/05/2014 Q: Our sour water stripped is fed with Sour water from our hydrocracker unit with respectively 40 000 ppmw and 35 000 ppmw of NH3 and H2S content and a pH of 9. Typical Residual NH3 and H2S in stripped water are respectively in a range of 50 ppmw and 0.5 ppmw. We recently observed that residual NH3 content in stripped water incresaed up to 2000 ppmw while residual H2S remained at low normal value. No change noticed on operating conditions. We also noticed an increase of ammonia content in waste water from vaccum fractionnator overhead vacuum system in the same range (2000 ppmw).
We tried to incresase live steam to feed ratio with no subsequent result.
we Drain the system completely to remove any residual contaminants and Isolate the amine sample coolers for one week and cleaning and Add N-2819M to achieve a molybdate.
how do we solve this problem with the Iron and PH.
23/11/2011 Q: What is the safe spill control procedure of the 98% sulphuric acid inside the plant for environment management and safety management?
Our plant has a DeSOx unit that removes SOx and spent Cat' (=dust) in Regenerator flue gas to meet environment standard.
After removing SOx and spent Cat' by Mg(OH)2 solution, the waste water that includes suspended solid like spent cat' is removed through filter press.
Because operation time of the two filter presses is not fixed and unknown, the cleaning man has to stay on or near the filter press to clean it, when switching.
1. How do you treat resulting waste water to meet environment regulation?
05/09/2011 Q: Can anyone give me a tip off on how to reduce high COD between 200,000-500,000 from sulfenol/amine waste in the gas plant.
15/08/2010 Q: we have an induced draft double-flow, cross flow cooling tower...using air to cool condensate water.
the tower fans has two speeds; low & high...In winter, usually low speed is used as the air temperature is low enough (Egypt), so that it reduces the water temperature by an acceptable manner. However; the water is found to exit from where the air enters -the louvers- while, through high speed operations in summer, this doesn't occur.
04/05/2010 Q: We are hydro-skimming crude refinery with cracking units, from last few months we are having higher Phenolic Compounds Contents in our waste water effluents. Also we do not have any waste water treatment unit in our refinery.