Process and device for cooling a gas by direct heat exchange with a cooling liquid

US7536873B2 · kind B2 · utility

Assignee

• Linde GmbH · DE

Inventor

• Thomas Nohlen · Oberhaching, DE

Key dates

• Filing date: Feb 10, 2006
• Grant date: May 26, 2009
• Expiry date: Feb 24, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F28D2021/0019
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

For cooling a gas by direct heat exchange with a cooling liquid, the gas (1) to be cooled is introduced into the lower region of a direct contact cooler (2). A first stream of cooling liquid (8) is fed into the direct contact cooler (2) above the point of introduction of the gas (1). Cooled gas (5) is removed above the point of introduction of the gas (1) from the direct contact cooler (2). A liquid backflow (10) is drawn off from the lower region of the direct contact cooler (2). At least at times, a second stream of cooling liquid (13) with a temperature that is lower than that of the backflow (10) is fed into the liquid backflow (10) and combined with the latter to form a return flow (11).