There are two identical 650-ton York chilling units for liquefying 1,300 tons/day of chlorine. The owner added some knock-out pots (chlorine liquefier separator tanks) to the original York skid package to separate the liquid chlorine from the non-condensable gases. All equipment from the York units, including the added knock-out pots, exists today. The entire unit has a footprint of about 60’ by 60’ and is three stories high. The unit is all carbon steel construction, since the chlorine is extremely dry.
The skid packaged unit was constructed by Reco York International. It utilizes 15,000 lbs of R134a refrigerant in each of the two systems.
Gaseous chlorine is piped to the two process units at 35 psig and 110°F in a 14” diameter pipeline. The chlorine flows through the tube side of the chlorine liquefier exchanger. With cold refrigerant on the shell side of the exchanger, the chlorine is cooled 0-5°F and liquefies.
The chlorine then moves to the chlorine liquefier separator tank where non-condensable materials go overhead and liquid chlorine comes out the bottom of the vessel to storage. The system for handling the non-condensable materials has been removed from the plant.
The refrigerant is vaporized in the same exchanger that is liquefying the chlorine. The refrigerant vapor then rises through four 20” pipes into the refrigerant accumulator. After passing through one of two demister pads, the refrigerant continues back to the refrigerant compressor.
The compressors are four-stage centrifugals (model M438B8) with 1,500 horsepower motors and Lufkin gearboxes. The equipment is in excellent condition and has been well-maintained even though it was not in operation. The compressors come with a Frick/York (Johnson Controls) PLC control system including Bently-Nevada proximity alert systems for both machines. These field control systems can be linked to any common DCS system. There is also one spare rotor stored in oil.
There is also an all-fiberglass Psychometric Systems Inc. (PSI) cooling tower available which was designed for this system. It is rated for 120 MM BTU/hr with two Goulds 20,000 gpm pumps driven by 400 hp, 4160 volt Siemens motors. It is designed for a 12°F delta in a two-cell tower system.
Click Here to View the Process Flow Diagram