What is the maximum scale for the aqueous urea process?
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A few years ago, there were an estimated dozens of new medium-scale urea production plants built in China; many of these used the CO2 stripping process, but quite a number still relied on the aqueous solution process, as domestic companies are very familiar with this approach. The aqueous solution process generally suffers from the issue of small scale. Dear experts, could you share what you know on this topic: what is the largest scale of aqueous solution urea plants that have been built recently? It is recommended to post discussions in the following format: 1. What is the scale of the aqueous solution process? Based on daily output. 2. What is the volume of the urine tower in cubic meters? 3. What new processes, materials, equipment, and technologies have been adopted?
Our engineers say that the process of full circulation of aqueous solutions is already an obsolete method
That’s true, but buddy, don’t forget that the full-circulation process for aqueous solutions has made us the pioneers in the urea industry and the main force in urea production in our country. It has been 50 years since 1958, a journey filled with challenges and difficulties – truly not easy at all. I was deeply moved after reading the article written by Professor Qian Jingqing titled \"Commemorating the 50th Anniversary of the Birth of China’s Urea Industry – The Development of the Fully Circulating Aqueous Solution Urea Process Technology in China\" (I have uploaded it to the nitrogen fertilizer process materials section). Regardless of the current processes, whether it’s NH3 stripping, CO2 stripping, IDR, ACES, or MEC in the United States, they are all improvements and enhancements built upon these foundations; thus, even the most advanced processes today still have aspects that can serve as a model. At present, in China, over 90% of small and medium-sized nitrogen fertilizers are produced using the urea aqueous solution process; the annual output from this method accounts for more than half of the total urea production in the country, making a significant contribution to agricultural production in China. As long as targeted technical upgrades and measures are implemented to reduce energy consumption, the aqueous solution process will continue to be useful for a long time. A tribute to the full-circulation process in aqueous solutions, and to those who have been working on its production and services over the years! ! !
The scale of the aqueous solution process is 1200 t/d. 2. The volume of the urine tower is 63 cubic meters. 3. The technologies used include high-efficiency trays in the synthesis tower, auto-stripping and carbon addition in the first and second stages of decomposition, as well as evaporation in the third stage
I just heard about a 400,000-ton water-based urea full-circulation plant; it’s here after all!
May I ask MSJ279 Haiyou: What is the actual production volume? How are the consumption of ammonia, steam, electricity, etc.? Can you reveal a little?
1. The scale of the aqueous solution process is 600 tons, based on daily production. 2. The volume of the urine tower is 54 cubic meters. 3. High-efficiency trays are used in the synthesis tower, along with hydrolysis processes and DCS control
The scale of the aqueous solution process is 600 tons, based on daily production
msj279 Haiyou: Could you please provide information on the power consumption and steam usage of your urea production facility?
At present, our company’s improved circulation method enables a production capacity of 1,000 tons per day. It is controlled by DCS, and the steam consumption is relatively low, around 600
I heard that the Shandong Institute has designed a 400,000-ton aqueous solution full-circulation urea plant in western Shandong; the ammonia consumption is said to be no more than 585, with other details unknown.
The largest one in China is the Shandong Institute, which has designed a fully circulating aqueous solution urea plant in western Shandong with a daily production capacity of 1,500 tons; the urea synthesis tower has a diameter of DN1800 and a volume of 81 cubic meters； In fact, there are many facilities that use the full-circulation aqueous solution method to produce 1,000 tons per day; the 18.30 projects launched in recent years in areas such as Shandong Pingyuan, Dongping, Luxi Erhua, and Mingshui all have a production capacity of around 1,000 tons per day ； After being upgraded by Ningbo Far East Chemical, companies such as Zhongnitong Liuliuhua, Liujiaxia, and Xinhua have also achieved a daily production capacity of around 1,000 tons.
Is the steam consumption really that low? What is the conversion rate in urea synthesis? Could you explain in more detail the reasons for the low steam consumption?
A urine treatment plant with a capacity of 54 cubic meters can produce 600 tons per day, which is an extremely low output; it needs to be upgraded, as 800 tons per day is entirely achievable
It is understood that Xiao Zhimin from Lühuan Company designed a aqueous urea production plant with a daily capacity of 1,600 tons for a fertilizer factory in Shandong; it is not clear whether this plant has been put into operation Has the production volume after commissioning met the design targets? Please, those who are aware of the situation, could you give some information?