Introduction   The section of the entire suspension steel inner cylinder in chimney is mainly in a state of tension, and the joints are less conducive to leakage prevention. The design and construction of the entire suspension steel inner cylinder, expansion joint and suspension platform are much more complicated. In order to solve the key problems in the design of suspension platform, steel inner cylinder, guide point and expansion joint, a structural design scheme of integral suspension chimney steel inner cylinder was proposed.

    Method   Through specific engineering examples, combined with calculation and analysis, the truss suspension platform structure and new suspension point design scheme were finally determined, and the calculation model of continuous beam considering the rotational stiffness of suspension platform was established for steel inner cylinder. The socket expansion joint was adopted and sealed with sealing fluid.

    Result   The results show that the design scheme meets the requirements of sealing and durability of chimney, and is convenient for construction and shorten the construction period.

    Conclusion   Through exploring and researching the structural design of steel inner tube of entire suspension chimney, the design scheme adopted has achieved better economic benefits, which can provide reference for similar projects.