The bulk boiler is assembled at the construction site of the construction unit. The boiler installation has a large amount of work, many types of work required, complex construction technology, high technical requirements, long construction period, and scattered operation sites. During construction, the construction method of pre combination and interleaving operation shall be adopted as far as possible to reduce aerial work, so as to speed up the installation progress and shorten the construction period; Arrange pulley block in concrete frame, and use winch