EFFLUENT COOLER IN THE MANUFACTURE OF ACRYLONITRILE

摘要

A process comprises recovering heat from reactor effluent, the reactor effluent comprising acrylonitrile or methacrylonitrile from an ammoxidation reactor. The recovering comprises heat exchange with feed water in an effluent cooler, wherein the recovering of heat occurs prior to the reactor effluent being quenched in a quench column. The process comprises shielding metal of the effluent cooler with metal shrouds at inlets of heat exchanger tubes of the effluent cooler. The process comprises online cleaning of fouling from components of the reactor effluent that accumulate on the metal shrouds, wherein the online cleaning comprises conveying scouring particles to the metal shrouds. In an aspect, the metal shroud protects the inlets of the effluent cooler from erosion during online cleaning that would otherwise occur at the inlets without the metal shroud.