Qinghai Yasi Polysilicon Tail Gas Recovery Unit – Coil-Type Heat Exchanger Project

The electronic-grade polysilicon production unit successfully incorporates the coil-type heat exchanger developed by Wuhan Donghai.

　　Recently, it was learned from the official website of Asia Silicon Industry Semiconductor Co., Ltd. that the company is located in the Xining Economic Development Zone in Qinghai Province. The first-phase 60,000 tons/year electronic-grade polysilicon project successfully completed its initial feed-in and startup, marking the successful production of the first batch of high-purity, genuine polysilicon products.

　　After successfully supplying over 100 heat exchangers for the project, our company has recommended the key equipment for the tail gas recovery unit to the owner and the design institute. - The rich-poor liquid heat exchanger utilizes the highly efficient coiled-tube heat exchanger product independently developed by Wuhan Donghai. This advanced design boasts notable features such as a compact structure, minimal footprint, high heat-transfer intensity, and exceptional thermal efficiency. After multiple rounds of technical discussions with the client, the design institute, and other relevant parties—during which we highlighted the solution’s ability to significantly reduce both capital investment and energy consumption—we successfully gained their approval, leading them to adopt our company’s recommendation. The smooth commissioning and successful implementation of this equipment also mark another milestone, demonstrating the practical application of Wuhan Donghai’s latest R&D breakthrough.

　　In recent years, as The introduction of the "Dual Carbon" goals has strongly encouraged and accelerated the development of renewable, clean energy sources, making it an essential path for China’s ongoing reform and growth. Among these emerging energy sectors, the photovoltaic (PV) industry stands out as one of the most promising, with polysilicon emerging as a key raw material whose market prospects are exceptionally bright. Currently, China accounts for approximately 90% of global polysilicon production capacity, while its PV module manufacturing capacity exceeds 95% of the world’s total—underscoring the rapid expansion of this sector and creating significant opportunities for the next wave of polysilicon projects. Our company, since 2… 012 Since the year, we've been focusing on polysilicon production units, specifically the feed and discharge heat exchangers in the cold hydrogen chemical section, as well as the overhead condensers. We've also been paying close attention to the lean-rich liquid heat exchangers used in the reduction section. H CL A technical comparison and comprehensive analysis were conducted to evaluate the advantages, disadvantages, adaptability, and economic benefits of replacing equipment such as the tower preheater, air coolers, and condensers in the distillation section with wound-tube heat exchangers.

　　Currently, our company has successfully supplied coiled-tube heat exchangers for the cold hydrogenation and reduction sections to several well-known polysilicon manufacturers in the industry, including Asia Silicon, Yunnan Tongwei, Poly Xinxin, and Xinjiang Jingnuo. Moving forward, Wuhan Donghai will continue to strengthen its R&D efforts and expand into new markets, delivering even more tailored solutions to the growing renewable energy sector.