Recently, Wuhan Donghai Petrochemical Heavy Equipment Co., Ltd. (Wuhan Donghai) successfully manufactured and delivered two critical, ultra-large coiled-tube heat exchangers to Zhejiang Yuanjin. Each unit weighs over 400 tons—making them currently the largest of their kind globally used in propane dehydrogenation processes. PDH ) The largest core main heat exchanger in the plant, featuring a hydrogen-to-hydrocarbon ratio that is globally leading. Their successful delivery marks a significant step forward for propane dehydrogenation technology toward greater efficiency and lower energy consumption, while also enhancing China's position as a global leader in high-end energy and chemical equipment manufacturing.
This newly delivered ultra-large coiled-tube heat exchanger incorporates several groundbreaking technological innovations. To handle the complex process conditions, the equipment’s structure features an advanced design that withstands high temperatures. In the core tube bundle section, Wuhan Donghai has implemented its own independently developed technologies—seismic-resistant and anti-coking solutions. These technological breakthroughs effectively address the safety and efficiency challenges inherent in long-term operation of large-scale units, serving as a critical foundation for enhancing the overall performance of the PDH unit while significantly reducing operational energy consumption.
As a national-level "Little Giant" enterprise specializing in niche, specialized, and innovative products, Wuhan Donghai has long been dedicated to the R&D and manufacturing of high-end pressure vessels and heat exchange equipment, boasting deep technological expertise and extensive engineering experience in the field of large-scale, heavy-duty wound-tube heat exchangers. The successful delivery of this globally leading-specification heat exchanger marks another significant achievement resulting from the company’s continuous investment in technological innovation and its relentless efforts to overcome technical challenges. This milestone firmly demonstrates China’s substantial progress in localizing high-end energy and chemical equipment, while also playing a vital role in enhancing the nation’s independent capabilities in large-scale petrochemical machinery.
The delivery of these two large coil-tube heat exchangers not only supports a specific project but also underscores China’s technological prowess in the high-end petrochemical equipment sector. Moving forward, Wuhan Donghai will remain committed to the research and development—and practical application—of core technologies, contributing to the advancement of China’s energy and chemical industries while strengthening their global competitiveness.
