Application of steel structure in cooling tower of power plant

The steel indirect air-cooling tower of Unit 1 is an all-steel structure, adopting Q355B steel, with a weight of about 6,500 tons. It consists of four parts: cone + spreading platform + cylinder + reinforcing ring; cone with 6 floors, height of about 65m, bottom diameter of about 148.7m; spreading platform with 2 floors, adopting truss structure; upper cylindrical tower with 12 floors, height of about 125.2m, outlet diameter of 92.5m, height of 190.2m, axial diameter of 148.7m at the bottom of the tower. The height of the tower is about 125.2m, the exit diameter of the steel tower is 92.5m, the height of the tower is 190.2m, and the axial diameter of the steel structure at the bottom of the tower is 148.7m, the steel tower consists of the main structure of the tower body and the two parts of the spreading platform, and the main structure of the tower body adopts the 704 lattice triangular assembled space structure, and the surface of the steel structure adopts the cold-sprayed zinc anticorrosive process, and the outer surface of the skin maintenance adopts the fluorocarbon paint baking process. It is the highest steel structure intercooling tower under construction in the world.

Compared with the traditional concrete inter-cooling tower, the steel inter-cooling tower has many advantages, such as low cost, good anti-seismic performance, short construction period, outstanding environmental protection, and fewer aerial workers. After the steel tower is in service, all steel and aluminum can be recycled without any construction waste, which fully responds to the national policy of promoting environmentally friendly energy development and environmental protection industry.

The traditional concrete tower has low residual value, long construction period and high risk, which has long been incompatible with the requirements of the era of green environmental protection and low-carbon development. Intelligent all-steel indirect air-cooling system technology, as a typical project of innovative engineering, resource-saving engineering, recycling economy demonstration project, and intelligent construction project, possesses the outstanding advantages of good seismic performance, low investment in construction, shorter construction period, safer construction, and high residual value. Prioritizing the use of steel intercooling towers will definitely become a trend in the thermal power industry in the future, and Shuangliang, while continuing to develop the market, will continue to innovate and optimize on the basis of the existing achievements and forge ahead, and strive to contribute to “carbon neutrality”.

At the same time, the steel structure intercooling tower has such difficulties as large project volume, high height, high welding difficulty, high precision requirements, complicated spatial positioning during installation, and the need to connect the steel truss units by means of welded node ball.

In order to ensure the smooth closing of the last steel structure of the cooling tower, the project department pays close attention to the safety management, together with the construction unit, the supervision unit to do a good job in the preparation of operating instructions, review work, and to participate in the construction of the staff to carry out the operation of the pre-delivery of all the instructions, clear lifting command, machinery operation and installation of personnel responsibility. Overall planning, well organized, fine construction, and finally successfully completed between the cold tower topping.