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In Ethylene Cracker Plants, Caustic tower is placed between Cracked GAs Compressor Final Stage and Pre Final Stage(eg 3rd and 4th).Is there any Technical reason behind it ? Or Its Just matter of Economics??? Your Views Please

hi all, I sometimes wonder abt the overemphasis on Seal level in the Reboiler Seal pot. Here the reboiling medium is propylene refrigerant vapor. the reboiling is perfect even without the level in the seal pot. LT and LG are also counter checked. And never faced the problem of hot vapor...

Hi Everyone, Some of the PSV's vents provided in Distillation Towers are routed to Atmosphere (if they pop up), not to flare as done normally. This is the case in most of Lighter hydrocarbons handling equipments like in Deethaniser and Ethylene tower. why cant we put them into flare? .IS...

Hi Everyone, I have this problem of DP across the filter increasing.We are using Sulphuric acid to dry the Chlorine in a Drying tower (Packed bottom and Tray top). In the downstream , we have a Dry Chlorine Filter( 5 no of candle filters) to remove the carry over sulphuric acid.Nowdays the...

Hi All, I have a situation here.we have to do welding on a line whose upstream is connected to the hydrogen system and the downstream is connected to a tank which is also blindedand the line is isolated with valve and tail blinded with teflon sheet. Now During welding the earth rod...

hi Guys, One simple Question.Why all volumetric flow meters measure flow in Nm3/hr , not in M3/hr? all2win

Hi All, We have a 78 % H2SO4 storage tank whose Level transmitter is not working. (DP type). we are not able to isolate the valve so that we can calibrate the LT.We have sufficient quantity of acid inside which we dont want to drain. Is there any way to solve this problem or...

hello, Anyone can suggest webresources on using numerical methods in C++. Anything is welcome tnx

Hi Guys, I want to learn some basics abt reading/interpreting loop diagrams and logic diagrams. Can anyone help me finding the Net resources? thanx

Hi, Anyone having useful linksgiving inormation about bipolar membranes used in chlor-alkali industries? thanx Live and Let Live

Hi Guys, Can someone help me in explaining how the slide stop in the screw compressor work(for capacity control).i have some idea abt slide valve. thanx

Hi, CAn Anyone tell me how to merge two PDf files into one file. Thanx

Hi Techies, I would like to know how Liquid ring vacuum pump works and where i can get some material in the net . Any help will be appreciated thanx

Hi guys, Has anyone has ideas about tuning Ph controller .(The pH is maintained by dosing caustic} We have a split control valve for this purpose.The fine controller is PID based.I can make the control valve slow and steady .But It collapses when slight...

Hi Everyone, We have a centrifugal compressor (4 stage)for chlorine service.it has a electronic Anti-surge controller which takes inputs from discharge pressure and flow to calculate the surge flow.Can anyone tell me how to calculate this flow.Any help will be...

hi gus, One more question.This is about nickel corrion at high temperatures.In chlor akali plants,sugar is used as a oxidation agent to reduce the nickel corrosion.Does anybody have details on this? thanx

Hi guys, Which is the siutable FRP (Fibre Reinforced Plastics} for chlorine and caustic environment?Is there any site available? thanx

Hi everyone, I want to send a formula sheet/particular portion ,Say 10R*8C from a sheet (which has many formula sections) through a mail system ( We use lotus CC mail ).I tried Copy/paste method.It doesn't work.Tell me how to do. Thanx. Alwin

Hi Guys, How to design the steam saturator? Or How the volume of the steam saturator is found out for LP Aand HP steam?.Any ideas? thanx, Alwin

Hi everyone, In our Multiple Effect(backward feed) Caustic evaporation Unit,50 % Product Concentration is Calculated on Weight % basis using tube(caustic side) side pressure and temperatures.8 to 9 kg/cm2 saturated steam is used for heating.No density meter is used. Can anyone tell...