| 摘要 |
<p>PURPOSE:To reduce a displacement of a supporting point and increase a strength of a central part of a nozzle support member by a method wherein on upper holder and a lower holder are provided with spacings for use in accommodating a thermal expansion of a vertical support member. CONSTITUTION:A vertical support member 1a is hung by an upper holder 3a fixed to a casing 20 and supported by it. In turn, its lower end is inserted into a lower holder 5a and supported in it. A pin guide 6a of the upper holder 3a has a rectangular shape with a length of l so as to enable a thermal expansion in on upward direction of the vertical support member 1a to be accommodated. A spacing part having a similar length is arranged at an upper position of the support member 3c. A lower holder 5a has a spacing of length l1 accommodating for a thermal expansion in a downward direction of a vertical support member 1a such that it is arranged at a lower position of a vertical support member 1c. An amount of displacement caused by a thermal expansion of the vertical support member 1a is reduced half and it is fixed to the vertical support member 1a. For example, it is possible to reduce a deflection amount of ammonium feeding nozzle by a half amount.</p> |
