突破高温密封瓶颈 光热发电关键部件技术获国际领先鉴定

Core Insights - The dual functionality of solar thermal power generation as both a peak-shaving power source and long-term energy storage is crucial for accelerating the construction of a new power system under the "dual carbon" goals [1] - The recent authoritative identification of the "flexible connection planar rotary joint for high-temperature molten salt trough solar collectors" technology marks a significant advancement, with experts recognizing its overall technical level as internationally leading [1][2] Group 1 - The technology developed by Changzhou Longteng Solar Thermal Technology Co., Ltd. addresses key challenges in molten salt trough solar power generation, achieving three major breakthroughs [2] - The first breakthrough involves the development of an injectable sealing filler using expanded vermiculite, hexagonal boron nitride, and mineral fibers, which overcomes the industry bottleneck for sealing at 560℃ [2] - The second breakthrough introduces a "slope-curved" composite sealing structure that enhances pressure self-augmentation and optimizes maintenance design, significantly improving operational efficiency and reducing maintenance costs [2] - The third breakthrough is the development of a composite surface treatment process combining laser cladding and chemical plating, effectively addressing issues of metal hardness reduction and friction coefficient increase at high temperatures [2] Group 2 - Trough solar thermal technology, due to its high maturity and stable operation, accounts for 79.97% of global installed capacity, while China's share is only 10.93% [3] - The low main steam temperature and high initial investment costs of traditional heat transfer oil trough power plants are significant barriers to their popularity among owners [3] - The breakthrough in high-temperature molten salt flexible connections fills a gap in commercial solutions within the solar thermal industry, facilitating the commercialization process of molten salt trough technology [3] - The successful development of this technology not only strengthens China's self-sufficiency in core solar thermal equipment but also positions the country at the forefront of international solar thermal technology research [3]