Rectification protective sleeve for reducing ash hanging level of air preheater

The utility model discloses a rectification protective sleeve for reducing the dust hanging level of an air preheater, and relates to the technical field of protective sleeves for air preheaters, in particular to a protective sleeve for an air preheater with high dust content. The utility model discloses a rectification protective sleeve which comprises a protective sleeve cylinder and an airflow guide component. The protective sleeve barrel is a cylindrical barrel; the one or more airflow guide parts are arranged in the protective sleeve cylinder according to a certain rule, the airflow guide parts are in a plate shape, a sheet shape, a columnar shape and the like, and when direct-flow smoke passes through the airflow guide parts, the smoke is disturbed to form spiral flow. According to the air preheater provided with the novel rectification protection sleeve, smoke spirally flows into the heat exchange pipe after flowing through the rectification protection sleeve, on one hand, the flow speed of gas close t