en.Wedoany.com Reported - The boiler main girder for Unit 7 of the Zhongmei Baoshan 2×650MW ultra-supercritical coal power (with co-firing of by-product gas) replacement and expansion project was successfully lifted recently. This marks another construction milestone for the project following the lifting of the boiler main girder for Unit 6, creating the conditions for the subsequent lifting of the boiler heating surface for Unit 7.
The project is led by East China Engineering Corporation of China Power Engineering Consulting Group under China Energy Engineering Corporation as the general contractor. The "Highly Efficient and Flexible 600MW Class Ultra-Supercritical Double-Reheat Boiler Coupled with By-Product Gas" adopted for the project has been selected for the National Energy Administration's fifth batch list of first (set) major technical equipment in the energy sector (Document No. 4 of 2025). This equipment is the first in the world to achieve large-proportion co-firing of by-product gas from steel plants on a 600MW class boiler, and Unit 7 is one of its core carriers.
The project utilizes ultra-supercritical parameters and variable-pressure operation once-through boiler technology, featuring a single-furnace, double-reheat, tangentially corner-fired, fully steel suspension structure tower-type boiler. With a multi-fuel collaborative combustion system, the boiler can solve the problem of stable combustion of low-calorific-value gas. Combined with ultra-supercritical double-reheat and flexible peak-shaving technology, it can match the fluctuations in Baosteel's by-product gas supply and the energy supply demands of the Shanghai region. Under load conditions of 70% and above, the unit can stably co-fire various industrial by-product fuels such as blast furnace gas, coke oven gas, and waste liquids. Once fully operational, this unit will become a demonstration project with the largest capacity and most advanced technology for co-firing steelmaking by-product gas in the 600MW class.
The main girder lifted this time has a single-piece weight exceeding 41 tons and a final placement height of over 106 meters, using a large flat-top tower crane for the operation. To address issues such as the narrow construction site and multi-trade cross-operations, the general contracting project department carried out special planning, reviewed the lifting scheme, and conducted safety and technical briefings for the operating personnel. Full-time supervision was implemented throughout the lifting process to ensure safety and precision.
The successive completion of the boiler main girder lifting for Units 6 and 7 has tested the general contracting team's overall coordination capability under multi-unit construction conditions. The project department will continue to advance subsequent processes such as the lifting of the heating surface, ensuring the orderly progress of project construction.
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