2 replies to this topic

[Tong weng]

Chlorine gas is ejected into the water to form chlorine water inside the dipping tank.

This dipping tank have a big surface area so chlorine evaporation is high. 

The chlorine gas that is evaporated on the surface is sucked and directed to a scrubber. 

 

I'm wondering is there a way to reuse the evaporated chlorine gas before heading to chlorine scrubber (neutralized with caustic soda)?

[Art Montemayor]

If you want to recover excess pure chlorine gas exiting the surface of your "dipping" tank instead of neutralizing it to prevent atmospheric contamination, you could compress, cool, liquefy the Cl₂ and return it back to your probable liquid chlorine storage tank.  The liquefaction of chlorine is relatively a simple process.

 

However, there are trade-offs.  Your dipping tank is going to have to be hermetic and free of oxygen or other inerts and you are going to have to dry the Cl2 to a very low moisture level.  This sounds like a good economic evaluation and justification project.

[shan]

You may consider to introduce Cl2 into the vapor space of the dipping tank to reach H2O/Cl2 equilibrium under slight pressure with a pressure control valve instead of ejecting excessive Cl2 into the dipping tank.