MULTIBARREL CHIMNEY AND METHOD OF ITS INSTALLATION Russian patent published in 1997 - IPC

FIELD: construction; applicable in construction of multibarrel chimneys of gas-turbine thermoelectric plants and stacks, mainly, of large height and great number of gas exhaust barrels. SUBSTANCE: multibarrel chimney includes load- carrying tower framework with supporting lower, middle and upper prismatic parts, stiffening diaphragms, service platforms. Upper prismatic part is installed on the middle part to form free space for accommodation of gas exhaust barrels. Installed inside the upper prismatic part is supporting frame. Auxiliary gantry is installed on the upper service platform for moving along it and for fastening the service platform above each gas exhaust barrel and in the middle. Gas exhaust barrels are installed over perimeter of the upper prismatic part. The method of installation of multibarrel chimney consists in that the installation of tower framework is started from installation of the foundation of the upper prismatic part of framework. Then, blocks of supporting tower part of framework with guide stops are mounted, using the upper prismatic part as auxiliary support. Tower crane is installed on the supporting frame of the upper prismatic part, and tackle block system is mounted, and its lower units are connected to the bottom of prismatic part, and the upper units are connected to the upper part of installed framework. Upper prismatic part is moved out of the installed part and alternating its displacement and fastening with stage mounting of middle part of framework by tower crane, it is brought to the design position. Auxiliary gantry with tackle block system is installed on the upper service platform, and gas exhaust barrels are installed with the help of auxiliary gantry and tackle block system. Gas exhaust barrels are passed inside supporting lower and middle part of framework and from outside of the upper prismatic part. Auxiliary gantry is moved over the upper service platform to the place of installation of each gas exhaust barrel. After installation of the barrels, tower crane is dismantled and installed instead of the crane, in the middle of the upper service platform, is auxiliary gantry which is used in repair of gas exhaust barrels. EFFECT: higher efficiency. 4 cl, 10 dwg