【Major Equipment in the Chemical Equipment Industry】1.75–2.6 million tons/year deep aromatics removal unit – vanadium-added steel forged and welded hydrogenation reactor

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This post was last edited by Desert Fish on 2022-5-8 18:41: Red May for chemical workers! Reply reward! ---------------------------------------------- The past decade has been a period of rapid development in China’s chemical industry, marked by the emergence of many new processes, products, and equipment. There has also been significant progress in China’s chemical processing equipment, which has contributed to the swift advancement of the petrochemical sector. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and greater use of domestic equipment. We invite everyone to share their insights and discuss these topics together, to cheer for Made in China and to support the development of chemical processing equipment! ===================== On March 30, 2021, Zhanghuaji (Suzhou) Heavy Equipment Co., Ltd. held a delivery ceremony at the heavy cargo terminal for the hydrogenation refining reactor of Shandong Ruize Chemical’s 2.6 million tons per year deep dearomatization plant. Leaders from the Zhangjiagang Science and Technology Bureau and the Industry and Information Technology Bureau, as well as representatives from Shandong Ruize Chemical and Zhanghua Machinery, project team members, and representatives from the production workshops attended this delivery ceremony. It is understood that the two vanadium-enhanced steel forged-welded hydrogenation reactors shipped this time are hydrogenation refining reactors, operating at a temperature of 415°C and a pressure of 17.7 MPa, in a hydrogen-rich environment. The reactor lengths are 42 m and 38 m respectively, with a diameter of 4.2 m and a thickness of 192 + 7.5 mm; their weights are 770 T and 720 T respectively. Hydrorefining reactors are commonly used in petroleum refining facilities; their function is to remove impurities such as sulfur, nitrogen, and metals from oil by adding hydrogen under high temperature and pressure, thereby improving the quality of the oil. The operating conditions of this reactor are extremely harsh; it is necessary to maintain not only the conventional properties of the vanadium-added steel substrate, but also its high-temperature performance and resistance to embrittlement, while simultaneously ensuring the overall properties of the welded joints ； Moreover, the surfacing layer on the inner surface must have uniform thickness, as well as excellent crack resistance, corrosion resistance, and resistance to hydrogen-induced delamination. Therefore, strict requirements are placed on the material selection and manufacturing processes for the equipment; the reactor substrate is designed to be made of 12Cr2Mo1V heat-resistant steel forgings with a stainless steel surfacing layer, which makes welding and heat treatment extremely challenging.