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  • Users: all2win
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  1. all2win

    caustic Tower

    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
  2. all2win

    Seal Pot level

    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...
  3. all2win

    PSV Vent To Atmosphere

    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...
  4. all2win

    DP across Filter Increasing

    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...
  5. all2win

    Hydrogen line welding

    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...
  6. all2win

    flowmeter basics

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

    Online calibration

    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...
  8. all2win

    numerical methods

    hello, Anyone can suggest webresources on using numerical methods in C++. Anything is welcome tnx
  9. all2win

    Loop diagram

    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
  10. all2win

    Bipolar membranes

    Hi, Anyone having useful linksgiving inormation about bipolar membranes used in chlor-alkali industries? thanx Live and Let Live
  11. all2win

    Screw compressor

    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
  12. all2win

    Merging PDF files

    Hi, CAn Anyone tell me how to merge two PDf files into one file. Thanx
  13. all2win

    Liquid ring vacuum pump

    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
  14. all2win

    pH controler tuning

    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...
  15. all2win

    Surge flow

    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...
  16. all2win

    sucrose as oxidation agent

    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
  17. all2win

    Frp for chloralkali plant?

    Hi guys, Which is the siutable FRP (Fibre Reinforced Plastics} for chlorine and caustic environment?Is there any site available? thanx
  18. all2win

    Copying the formula sheet

    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
  19. all2win

    Hi Guys, How to design the

    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
  20. all2win

    Density Calculation

    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...

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