【Major Chemical Equipment】077 – Domestic N08810 nickel-based alloy heat exchangers
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This post was last edited by Desert Fish on 2022-4-3 at 11:11. The past decade has been a period of rapid development in China’s chemical industry, with the emergence of many new processes, products, and equipment. China’s chemical processing equipment has also seen significant progress, which has contributed to the swift advancement of the petrochemical industry. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and localization of equipment. Everyone is welcome to share, discuss, and exchange ideas; let’s cheer for Made in China and support the development of chemical processing equipment! *********************************** In January 2022, with the final two heat exchangers shipped, all four N08810 nickel-based alloy heat exchangers for Qinghai Asia Silicon’s 60,000 tons per year electronic-grade polysilicon project, developed by Lanshi Heavy Equipment, were completed and delivered. This is another domestically produced N08810 nickel-based alloy heat exchanger developed by Lanshi Heavy Equipment, following the successful creation of a domestically made N08810 nickel-based alloy cold hydrogenation reactor; it indicates that Lanshi has fully mastered the capability to produce such devices domestically.
More people are welcome to participate in the relevant discussions. Click on the blue link to access it: The 【HaiChuan Equipment Guessing Game】 series is being updated continuously in 2022; all fans are invited to join actively! https://bbs.hcbbs.com/thread-2079686-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post on the series 【Major Equipment in the Chemical Equipment Industry】 https://bbs.hcbbs.com/thread-3312079-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post discussing the components of cracking furnace equipment for 【Ethylene Cracking】 https://bbs.hcbbs.com/thread-3308724-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum)
It is understood that for this batch of heat exchangers, the shell side, tube side, and heat exchange tubes are all made of N08810 nickel-based material; the design temperature reaches as high as 570°C. Welding and post-weld stabilization heat treatment present significant challenges, and strict controls are required regarding the contents of carbon, aluminum, and titanium in the raw materials. The company maintains strict control over the quality of materials and welding, carefully regulating parameters such as ovality and straightness, addressing various manufacturing challenges related to overall heat treatment, and successfully completing the manufacturing tasks.
Lanshi Heavy Equipment also focuses on leveraging its corporate strengths by forming strong partnerships with well-known downstream enterprises to jointly promote innovative development. This year, the company and Asia Silicon have established a strategic partnership based on high-end new energy equipment and cutting-edge photovoltaic industry projects, covering areas such as new energy equipment, technology research and development, EPC project management, inspection and maintenance, and capital operation. By leveraging the strengths of both parties, they aim to promote the green and healthy development of the new energy industry. In terms of the research and development of core equipment for the photovoltaic industry as well as cooperation on new polysilicon projects, leveraging Lansi Heavy Equipment’s experience in energy equipment manufacturing and its established domestic supply system for materials, both parties will work together to develop core polysilicon production equipment such as large-scale cold hydrogenation reactors – the first fully domestically produced such reactors of their kind in China. This effort aims to promote the full domestic production and integration of key large-scale equipment in the photovoltaic sector, from materials to manufacturing processes. The two parties will pursue further extensive cooperation in the field of equipment manufacturing and services for new polysilicon projects in the future. For example, Asia Silicon Industry will give priority to promoting Lansi Heavy Equipment as a supplier of products and services. The two parties will engage in in-depth collaboration on new energy projects such as \"photovoltaic + energy storage\" and hydrogen energy, working together to establish demonstration projects for the production, storage, and utilization of new energy in areas such as Xining and Lanzhou New Area. At present, most of the polysilicon projects invested and built in China are located in the northwest region. Polysilicon equipment is all large-scale equipment, resulting in high transportation costs; furthermore, some of this equipment exceeds size limits and cannot be transported over long distances, requiring on-site manufacturing. Lanshi Heavy Equipment makes full use of its unique geographical advantages, seizes market opportunities, and focuses on developing the photovoltaic industry. The company has also collaborated with Lansi Enli on a photovoltaic rooftop microgrid project, which provides uninterrupted power supply to its internal electrical facilities, resulting in significant energy savings and emission reductions. This project has been designated as a key clean energy project by the Gansu Provincial State-owned Assets Supervision Commission, and its commercialization can be pursued in the future.
China’s first domestically produced cold hydrogenation reactor for the Asia Silicon Industry project, made of N08810 material, was shipped recently. The core material for this device – thick nickel-based alloy steel plates of N08810 grade – was supplied by Taiyuan Iron and Steel Company. This also marks the successful replacement of imported materials with domestically produced key materials for the photovoltaic polysilicon industry by Taiyuan Iron and Steel. Against the backdrop of advancing the \"dual carbon\" strategic goals, clean and low-carbon new energy sources, represented by photovoltaic power, have become the driving force behind the transformation of the energy industry. With **policy support, China’s photovoltaic industry has maintained a leading position globally for many years in terms of technical capabilities, power generation volume, and installed capacity, offering broad market prospects. Polysilicon is the main raw material for solar panels in the photovoltaic industry, and the core equipment used in its production – the cold hydrogenation reactor – is typically manufactured from thick plates of N08810 nickel-based alloy. Due to the stringent requirements regarding resistance to high temperatures and pressures, high wear, and severe corrosion, these materials have had to be imported, thus becoming a critical bottleneck in polysilicon production. In 2018, after identifying this need during market visits, the marketing staff at Taiyuan Iron and Steel Company actively collaborated with the production and technical departments to conduct repeated discussions and exchanges with key players in the polysilicon industry, as well as design institutes and equipment manufacturers, in order to work together on solving the related challenges through experimentation. Leveraging Taiyuan Iron and Steel’s strong research and development capabilities, it was ultimately possible to secure an order for thick N08810 nickel-based alloy plates to be used in China’s first domestic cold hydrogenation reactor, and the delivery of these plates was completed on time and to high quality.