ATMOSPHERIC DISTILLATION COLUMN OVERHEAD OIL-GAS HEAT EXCHANGE APPARATUS AND HEAT EXCHANGE METHOD

摘要

Provided are an atmospheric distillation column overhead oil-gas heat exchange apparatus and heat exchange method, the heat exchange apparatus comprising: a heat exchanger shell (11), an upper tube sheet (16), a lower tube sheet (17), and a heat exchange tube (5). The bottom of the shell (11) is provided with a tube-side inlet (13), and the top of the shell (11) is provided with a tube-side outlet (18). An upper portion of the shell (11) is provided with a shell-side inlet (12) connected to an atmospheric distillation column overhead oil-gas pipeline (2), and a lower portion of the shell (11) is provide with a shell-side outlet (14). A water injection coil pipe (6) is further configured in the upper portion of the shell (11), and is provided thereon with a plurality of water ports (61) interconnected with an interior of the shell (11). The atmospheric distillation column overhead oil-gas pipeline (2) is connected to an external water injection pipeline (3) via a first water injection pipeline (31) and a third water injection pipeline (33). The first water injection pipeline (31) and the third water injection pipeline (33) are respectively provided with a first solenoid valve (34) and a second solenoid valve (35) thereon. The water injection coil pipe (6) is connected to the external water injection pipeline (3) via a second water injection pipeline (32). In the heat exchange apparatus, first and second water streams are continuously injected into a shell side in specific proportions, and a third water stream is intermittently injected into the shell side in a mass flow, thereby flushing out aged scale in the shell side, and preventing the heat exchanger from blocking and corroding.