Chorine Liquefaction

Chlorine Chlorine

Chlorine Liquefaction
Cooling Water 5 Condenser

Refrigerant Compressor 3

4

5

Evaporator Liquefier 8

Uncondensed Gas

Compressed Chlorine
6 2

LiquefactionKnockout Pot

7 Liquid Chlorine 1

1

Refrigerant Hold Tank

Chlorine Liquefaction Manual/Isolation Valves
1 4 3" - 6" 815L 11 2236 XZ w/Handle 12" - 20" 815L 11 2236XZ w/ M Series GearActuator 5 6 6" - 12" 815L 11 2236XZ w/ M Series Gear Actuator 1" 7300C 31 2271XTZ alt. 1" 9FAC 2271XT 2

Automated or Rotary Control
3" - 4" 815L 11 2236 XZ w/ QPX Actuator w/Positioner * 10" - 18" 815L11 2236 XZ w/ QPX Actuator w/Positioner * 8 7 4"-8" 830LC 11 2271XZ w/ QPX Actuator w/Positioner * alt. Valve 3" - 6" 7300 C 31 2271 XTZ 3"-8" 830LC 11 2271XZ w/ QPX Actuator w/Positioner * alt. Valve2" - 6" 7300 C 31 2271 XTZ1

Application Bulletin Chlo5

3

* Positioner can be: NE Style Electro Pneumatic NP Style Pneumatic ND Style Digital

Chlorine Processing
Cl2 is liquefied so thematerial can be safely and conveniently stored, transported and consumed. Liquefaction occurs when the previously compressed Cl2 is cooled to a sufficiently low temperature.

LiquefactionLiquefaction is normally a staged process. Normal practice is to liquefy most of the Cl2 under relatively mild conditions and then increase the pressure of

Application Bulletin

Issue 2/2007Liquefaction (Con’t.)
the gas or reduce its temperature in stages. Operating stages at different temperatures often requires the use of two different refrigerants. For simplicity, a single stage is shown. Someimpurities in the Cl2 gas entering liquefaction are non– condensable. These leave liquefaction as a vent steam carrying Cl2 with them. This “tail gas” cannot be released to the atmosphere. The mostcommon approach to disposing of the “tail gas” is to: a. Synthesis of a useful product from the Cl2 (HCL, Bleach, FeCl3) b. Destruction of the Cl2 by scrubbing with alkaline material c. Enhanced...