What is the reaction mechanism inside the waste chlorine absorption tower?

The principle is the same as that of all packed tower reactors: liquid caustic soda is circulated and sprayed to come into countercurrent contact with the waste chlorine gas flowing from bottom to top within the packing layer; the products formed are sodium hypochlorite and sodium chloride. The exhaust gas that does not participate in the reaction is mainly air, which is discharged into the atmosphere driven by a fan.

What was said upstairs is correct; it’s actually a tower reactor, where chlorine reacts with caustic soda to produce hyposodium and salt

An exhaust gas absorption tower is a tower-type reactor, with the main control parameters being the liquid phase temperature and vacuum level. If the temperature of the liquid phase is too high, absorption is slow, and chlorine gas tends to be discharged at the top of the tower ； Secondly, the high temperature of the liquid phase leads to easy decomposition in the circulation tank, releasing chlorine gas that is difficult to control. Controlling the vacuum level in the tower is also important; too high a vacuum level can cause the water seal in the chlorine gas main to break, while too low a vacuum level hinders the intake of waste gases. It is recommended to use automatic air supply control for regulating the vacuum level. More importantly, the circulation pump is equipped with a dual-power supply system as well as an interlocked automatic liquid supply function. Ensure the liquid phase does not stop flowing.

I’ve learned it, but what does the dual power supply setting mentioned on the 4th floor mean?

A dual power supply means that the pump is powered by a dual-power switching device, ensuring a secure power supply for the pump.

A dual-power supply means it has an emergency power source; in the event of a failure of the normal power supply, the emergency power source takes over to provide power. By the way, I have a question for the person on the fourth floor. As you said, with a high vacuum level, does it damage the positive water seal or the negative water seal? What is the chlorine pressure in your electrolyzers? What are the set values for the positive and reverse water seals?

How should the pressures in the absorption tower, the exhaust tower, and the fans be controlled to meet the requirements?

Cl2 + 2NaOH = NaCl + NaClO + H2O releases heat

Chlorine reacts with caustic soda to produce hyposodium and salt

So how is the filler height determined?