【Ten Years of Rapid Development in Chemical Equipment】Dalian Jinzhong’s 600,000-ton urea full-condenser reactor from 1989 to 2023

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The chemical processing industry has seen significant development over the past decade; let’s celebrate the prosperity and strength of modern China. By contributing our ideas, we can encourage more people to participate and make the discussions more lively. HaiChuan becomes even better with your involvement – we welcome everyone to join in the forum discussions and exchanges. ********************************************* Jiangsu JinKong Equipment XinHengSheng Chemical Co., Ltd.’s project for upgrading its production capacity, with an annual output of 400,000 tons of synthetic ammonia and 600,000 tons of urea, requires a total investment of 497,799.8 million yuan. The project is located in the SuHua area of Xinyi Economic Development Zone, and it is considered a key construction project at both the Xuzhou city level and the Xinyi county level. Phase 1 of the project employs the Aerospace Maiwei coal powder fluidized bed pressurized continuous gasification process, enabling an annual production capacity of 400,000 tons of synthetic ammonia, 600,000 tons of urea (including 600,000 tons of urea-based compound fertilizers), and 33,800 tons of 98% concentrated sulfuric acid (with a designed capacity of 50,000 tons per year; Phase 2 will have a capacity of 12,000 tons per year) ； Phase 2 adopts a pulverized coal fluidized bed pressurized continuous gasification process to produce 200,000 tons of ethylene glycol per year, with by-products including 150,000 tons of methanol, 6,700 tons of dimethyl carbonate, and 17,600 tons of mixed polyols. The full-condenser reactor is the core equipment that integrates ammonium methoxide condensation and urea synthesis; its lower section serves as the condensation zone. By maintaining a high water-to-carbon ratio, the condensation temperature of ammonium methoxide increases, allowing low-pressure steam at 0.6 MPaA to be produced in this lower section, thereby improving heat utilization efficiency ； The upper section is the reaction zone, where the dehydration of methylamine to produce urea takes place; this process helps to distribute the load in the urea synthesis tower more effectively and reduces the volume of that tower. The relocation, upgrading and technical renovation project of Jiangsu Jinkong Equipment Xinhengsheng Chemical Co., Ltd., which aims to increase annual production by 400,000 tons of synthetic ammonia and 600,000 tons of urea, features a full-condensation reactor with a complex structure: its diameter is 3.3 meters and its height is 29.233 meters. The reactor’s cylinder is made of Q345R multi-layer wrapped composite plates, while the lining is constructed from 8-mm-thick 2522 duplex steel resistant to corrosion. The equipment’s net weight, excluding the internal components, exceeds 500 tons. The design was completed in 3 months by China Wuhuan Engineering Co., Ltd., and the manufacturing was finished in 16 months by Dalian Jinzhou Heavy Machinery Group Co., Ltd. It is the heaviest vertical equipment among the units involved in the 40·60 project, and it is also the high-pressure equipment with the greatest weight and the most difficult to lift in the urea plant. On April 8, 2023, the full-condensation reactor, a key piece of equipment for the urea production unit in Jiangsu JinKong Equipment XinHengSheng Chemical’s expansion project aimed at increasing annual production to 400,000 tons of synthetic ammonia and 600,000 tons of urea, was successfully lifted into place. The weight of a single full-condensation reactor unit even exceeds 500 tons ； The stripping tower lifted for the first time this time weighs 252 tons, with dimensions of Φ2900*15440 mm, and the support position is at 12.45 m. The heavy equipment and limited space for positioning are the challenges in this lifting operation.