【Major Industrial Equipment in the Chemical Industry】019 – China’s largest current urea synthesis tower with a capacity of 300,000 tons per year, model DN1800JX, featuring energy-saving features
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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 increased use of domestic equipment. We invite everyone to share their insights and engage in discussions, to cheer for Made in China and to support the development of chemical processing equipment! *********************************** On March 29, 2015, the country’s largest urea synthesis tower to date, with a capacity of 300,000 tons per year and model DN1800JX, which was designed and manufactured by Sichuan Lanxing Machinery, was successfully loaded onto a truck for shipment. According to the relevant officials, this equipment will be put into use in the 300,000 tons per year urea production project at Sichuan Dazhou Jiuyuan Chemical Co., Ltd. In the past, such equipment was manufactured in segments at the production plant, with on-site welding and assembly. Due to the limitations of on-site conditions, the product production time and cost **increase**. As the largest chemical equipment manufacturing enterprise in the western region, in recent years Lanxing Machinery has focused on market trends and kept up with developments, moving toward larger-scale products and integrated services. It has established a \"one-stop\" service that covers design, production, and installation, and has made bold attempts; it has successfully developed large-scale equipment such as the WHG gasification furnace and the Ningmei furnace, enabling their final assembly and shipment from the factory. Through process innovation and integrated manufacturing, this urea synthesis tower **reduced the production cycle and saved tens of thousands of yuan in manufacturing costs. This urea synthesis tower is nearly 36 meters long, 1.8 meters in diameter, and weighs almost 350 tons. It employs a liquid-phase counter-current heat exchange process, enabling a carbon dioxide conversion rate of over 72.4%. Compared with domestic urea production plants that use the aqueous solution full-circulation method, it can reduce the total energy consumption per ton of urea by 70.3 kg of standard coal, resulting in annual savings of more than 21,000 tons of standard coal. It can be used for the renovation of existing urea production plants using the aqueous solution full-circulation method or for new projects. This device features low investment costs, simple operation, high production capacity, significant energy savings and reduced consumption, as well as minimal environmental pollution. It meets the requirements of **industrial policies and boasts broad market prospects; its technology is at an advanced level in China. It is of great significance for promoting the development of energy-saving technologies in our country, accelerating the upgrading of the urea industry, and advancing the localization of chemical processing equipment.
The 【Haichuan Equipment Guessing】 series is being updated continuously in 2022; all Haichuan community members are welcome to participate 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)
Since its establishment in 1966, the company has supplied nearly 10,000 units of various pressure vessel equipment for key projects such as ammonia synthesis, urea production, ethylene production, polypropylene production, polyvinyl chloride production, oil refining, methanol production, dimethyl ether production, caustic soda production, phosphate ammonium fertilizer production, sulfuric acid production, nitric acid production, acetic acid production, coking, polyphenylene sulfide production, PTA (purified terephthalic acid) production, polysilicon production, melamine production, hydrazine hydrate production, antibiotic manufacturing, power plants, urban gas systems, liquefied natural gas facilities, and sewage treatment plants. It ranks first in the country in terms of production and sales volume for urea synthesis towers, and has developed multiple series including those using full circulation of aqueous solutions, carbon circulation, and stripping methods with diameters ranging from DN1200 to DN2400; it is thus known in the industry as a specialist in urea synthesis towers. In 2009, the urea synthesis tower was awarded the title of “Sichuan Famous Brand Product”. Lanxing Machinery is the only specialized manufacturer of spherical tanks in the southwest region that integrates design, pressing, and installation. To date, it has produced nearly 500 spherical tanks, with the largest individual tank having a capacity of 8,000 cubic meters. The \"egg-shaped\" spherical tanks and stainless steel spherical tanks were developed for the first time in China by this company. The ammonia synthesis towers and methanol synthesis towers produced by the company hold a significant market share; currently, there are series of ammonia synthesis towers ranging from DN800 to DN2400, as well as series of methanol synthesis towers ranging from DN1600 to DN3400. Lanxing Machinery is one of the earliest manufacturers to develop low-temperature pressure vessels. Low-temperature vessels, towers, and heat exchangers made from materials such as 16MnDR, 09Mn2VDR, and 09MnNiDR are widely used in industries such as ethylene, polypropylene, dimethyl ether, coal-to-hydrogen production, and oil refining, and they represent the company’s most productive core products. In recent years, Lanxing Machinery has been continuously strengthening its efforts in technological innovation and upgrading. It has now become one of the few manufacturers in China capable of producing large-scale pressurized gasification units for coal chemical processing, with furnace types including Lurgi furnaces and five-ring furnaces. The company also produces other heavy equipment such as plate-welded hydrogenation reactors. The five-tube-plate ammonia cooler for ammonia synthesis, the double-pressure absorption tower for nitric acid production, and the low-pressure methanol synthesis tower using ligand-assisted reaction are energy-saving and consumption-reducing devices of international advanced level that have been recently developed by the company. The high-efficiency and energy-saving urea synthesis tower developed by Lanxing Machinery for the renovation of 300,000 tons/year urea plants has economic and technical parameters that have reached international advanced levels.