The utility model belongs to the technical field of
ethylene cracking equipment, and discloses a
quenching heat exchanger. The
quenching heat exchanger comprises a
barrel, an upper tube plate, a lower tube plate, an inlet seal head, an outlet seal head and a plurality of heat exchange tubes, the upper tube plate and the lower tube plate are connected to the two ends of the
barrel respectively in the vertical direction and jointly define a shell pass cavity, cooling water circulates in the shell pass cavity, the inlet end socket is connected to the end, away from the
barrel, of the lower tube plate, the outlet end socket is connected to the end, away from the barrel, of the upper tube plate, and the heat exchange tubes are evenly distributed in the barrel. One end of the heat exchange tube penetrates through the lower tube plate and is communicated with the inlet seal head, and the other end of the heat exchange tube penetrates through the upper tube plate and is communicated with the outlet seal head, so that high-temperature
cracking gas circulates in a tube pass chamber in the heat exchange tube; the upper tube plate is provided with an exhaust mechanism, and the exhaust mechanism is used for exhausting
water vapor accumulated on the upper tube plate; the lower tube plate is provided with a
sewage discharging mechanism which is used for discharging
dirt accumulated on the lower tube plate. The
quenching heat exchanger can
discharge stains and
water vapor, and the reliability of the quenching heat exchanger is improved.