Carbon dioxide flash vapor recovery unit

Abstract

The utility model discloses a carbon dioxide flash recovery device, including the purification tower, the purification tower is from below to above and is divided into reboiler section, padding section and top heat exchanger section in proper order, top heat exchanger section includes heat exchanger casing and impurity discharge pipe, heat exchanger casing inside is provided with multiple groups of vertical pipe bundle, and pipe bundle import is linked with padding section's primary flash gas export, the outside of pipe bundle is wrapped with the outer chamber that supplies the refrigerant flow, heat exchanger casing one side is equipped with with refrigerant inlet pipe of the outer chamber through, heat exchanger casing other side is equipped with with refrigerant outlet pipe of the outer chamber through, impurity discharge pipe sets up at heat exchanger casing top, is used for discharging the impurity gas that has not condensed, the utility model discloses top heat exchanger section is improved from gas / gas heat exchange to liquid / gas heat exchange, namely the refrigerant is introduced into top heat exchanger section, under the condition that top heat exchanger section size is basically unchanged, and heat exchange coefficient improves greatly.

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