Patent ID: 6889508
Filing Date: 2005-05-10
Classification: F25J

Abstract:
1. An apparatus for producing a purified, pressurized liquid carbon dioxide stream comprising: a bulk liquid carbon dioxide supply tank for distilling off a feed stream comprising carbon dioxide vapor; a purifying filter for purifying the carbon dioxide vapor feed stream; a condenser for condensing the carbon dioxide vapor feed stream into an intermediate liquid carbon dioxide stream; a receiver for accumulating the intermediate liquid carbon dioxide stream; a high-pressure accumulation chamber for accepting the intermediate liquid carbon dioxide stream from the receiver; a heater for heating the high-pressure accumulation chamber for pressurizing the carbon dioxide liquid contained therein to a delivery pressure; a sensor for detecting when the high-pressure accumulation chamber requires replenishment of liquid carbon dioxide; a flow network having conduits connecting the bulk supply tank, the condenser, the receiver and the high-pressure accumulation chamber and for discharging the pressurized liquid carbon dioxide stream therefrom; the conduits of said flow network including a vent line from the high-pressure accumulation chamber to the condenser to facilitate introduction of the intermediate liquid carbon dioxide stream into the accumulation chamber; and, the flow network having valves associated with said conduits to allow for isolation of components of the apparatus.