Discussion on the Application of Low-Temperature Methanol Wash at Dalian University of Technology
Thread Content
Could anyone tell me how the low-temperature methanol washing technology is being used at Dalian University of Technology? There are several sets in use; how is their performance? How is its material balance? Exactly how many people at Dalian University of Technology are working on this research achievement? How is the service attitude? Thank you so much! ! !
Performance of Dalian University of Technology’s low-temperature methanol washing technology
Serial Number | Project Name | Partner Company | Completion Status
1 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Lanzhou Fertilizer Factory | Sinopec Lanzhou Design Institute | Successful commissioning
2 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Inner Mongolia Fertilizer Factory | Wuhuan Engineering Company | Successful commissioning
3 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Ningxia Fertilizer Factory | Sinopec Lanzhou Design Institute | Successful commissioning
4 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Wuhan Petrochemical First Fertilizer Plant | Sinopec Lanzhou Design Institute | Successful commissioning
5 | Coal-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Nanjing Fertilizer Factory | Nanhua Design Institute | Successful commissioning
6 | Oil-to-gas conversion project, along with liquid nitrogen washing using low-temperature methanol washing technology, for the 300,000-ton ammonia synthesis plant at Benxi Beigang | Wuhuan Engineering Company | Successful commissioning
7 | Expansion and renovation plan for Harbin Gasification Plant | Wuhuan Engineering Company | Design completed
8 | Coal-to-gas conversion project, along with liquid nitrogen washing using low-temperature methanol washing technology, for the 300,000-ton ammonia synthesis plant at Dahuahua | Donghua Engineering Company | Design completed; new plant construction
9 | Ammonia (methanol) production project with an annual capacity of 300,000 tons at Dezhou Fertilizer Factory | Huanqiu Engineering Company | Successful commissioning
10 | New methanol production plant project with an annual capacity of 200,000 tons at Weihe Fertilizer Factory | Tianchen Engineering Company | Successful commissioning
11 | Ammonia production plant with an annual capacity of 25 tons in Liuzhou | Sinopec Lanzhou Design Institute | Successful commissioning
12 | Methanol production plant with a daily output of 1,500 tons at Xianghuoju | Donghua Engineering Company | Design completed
13 | 300,000-ton methanol production project at Dahuahua | Wuhuan Engineering Company | Design completed
14 | 300,000-ton methanol production project at Henan Kaixiang | Wuhuan Engineering Company | Design completed
15 | 600,000-ton methanol production project at XinAo | Tianchen Engineering Company | Design completed
16 | 300,000-ton ammonia and 360,000-ton methanol production project at Tengzhou Phoenix | Tianchen Engineering Company | Design completed
17 | 400,000-ton methanol production project for Shennu Phase II | Tianchen Engineering Company | Design completed
18 | 900,000-ton methanol production project at Jiutai Energy | Tianchen Engineering Company | Design completed
19 | 400,000-ton ammonia production plant at Linggu | Donghua Engineering Company | Design completed
20 | 300,000-ton methanol production project at Inner Mongolia Yize Mining | Chengdu Chengda | Design completed
21 | 300,000-ton ammonia production plant at Inner Mongolia Nailun | Hualu Technology Engineering Company | Design completed
22 | 200,000-ton methanol production plant in Puyang | Lanzhou Design Institute | Design completed
23 | 600,000-ton methanol production plant at Xinjiang Tianfu | Donghua Engineering Company | Design completed
24 | 200,000-ton methanol production project at Inner Mongolia Menghua Energy Company | Chengdu Chengda | Design completed
25 | 300,000-ton methanol production project at Anhui Linquan Chemical Co., Ltd. | Lanzhou Design Institute | Design completed
26 | 300,000-ton methanol production project at Shilin Chemical Co., Ltd. in Wushen Banner, Ordos City | Wuhuan Engineering Company | Design completed
27 | 600,000-ton methanol production project at Guizhou Xinsong Coal Chemical Industry | Donghua Engineering Company | Design completed
28 | 200,000-ton acetic acid production project at Shaanxi Yanchang Yulian | Hualu Technology Engineering Company | Design completed
29 | 600,000-ton methanol production plant at Huating | Donghua Engineering Company | Design completed
30 | 300,000-ton ammonia and 300,000-ton methanol production project at Tongzi | Donghua Engineering Company: Design in progress
31 | 600,000-ton methanol production project at Inner Mongolia Mengda | Donghua Engineering Company: Design in progress
I hope that those of you who have experience with this technology can share their insights on its actual application. Thank you very much!
Serial Number | Project Name | Partner Company | Completion Status
1 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Lanzhou Fertilizer Factory | Sinopec Lanzhou Design Institute | Successful commissioning
2 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Inner Mongolia Fertilizer Factory | Wuhuan Engineering Company | Successful commissioning
3 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Ningxia Fertilizer Factory | Sinopec Lanzhou Design Institute | Successful commissioning
4 | Oil-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Wuhan Petrochemical First Fertilizer Plant | Sinopec Lanzhou Design Institute | Successful commissioning
5 | Coal-to-gas conversion project for the 300,000-ton ammonia synthesis plant at Nanjing Fertilizer Factory | Nanhua Design Institute | Successful commissioning
6 | Oil-to-gas conversion project, along with liquid nitrogen washing using low-temperature methanol washing technology, for the 300,000-ton ammonia synthesis plant at Benxi Beigang | Wuhuan Engineering Company | Successful commissioning
7 | Expansion and renovation plan for Harbin Gasification Plant | Wuhuan Engineering Company | Design completed
8 | Coal-to-gas conversion project, along with liquid nitrogen washing using low-temperature methanol washing technology, for the 300,000-ton ammonia synthesis plant at Dahuahua | Donghua Engineering Company | Design completed; new plant construction
9 | Ammonia (methanol) production project with an annual capacity of 300,000 tons at Dezhou Fertilizer Factory | Huanqiu Engineering Company | Successful commissioning
10 | New methanol production plant project with an annual capacity of 200,000 tons at Weihe Fertilizer Factory | Tianchen Engineering Company | Successful commissioning
11 | Ammonia production plant with an annual capacity of 25 tons in Liuzhou | Sinopec Lanzhou Design Institute | Successful commissioning
12 | Methanol production plant with a daily output of 1,500 tons at Xianghuoju | Donghua Engineering Company | Design completed
13 | 300,000-ton methanol production project at Dahuahua | Wuhuan Engineering Company | Design completed
14 | 300,000-ton methanol production project at Henan Kaixiang | Wuhuan Engineering Company | Design completed
15 | 600,000-ton methanol production project at XinAo | Tianchen Engineering Company | Design completed
16 | 300,000-ton ammonia and 360,000-ton methanol production project at Tengzhou Phoenix | Tianchen Engineering Company | Design completed
17 | 400,000-ton methanol production project for Shennu Phase II | Tianchen Engineering Company | Design completed
18 | 900,000-ton methanol production project at Jiutai Energy | Tianchen Engineering Company | Design completed
19 | 400,000-ton ammonia production plant at Linggu | Donghua Engineering Company | Design completed
20 | 300,000-ton methanol production project at Inner Mongolia Yize Mining | Chengdu Chengda | Design completed
21 | 300,000-ton ammonia production plant at Inner Mongolia Nailun | Hualu Technology Engineering Company | Design completed
22 | 200,000-ton methanol production plant in Puyang | Lanzhou Design Institute | Design completed
23 | 600,000-ton methanol production plant at Xinjiang Tianfu | Donghua Engineering Company | Design completed
24 | 200,000-ton methanol production project at Inner Mongolia Menghua Energy Company | Chengdu Chengda | Design completed
25 | 300,000-ton methanol production project at Anhui Linquan Chemical Co., Ltd. | Lanzhou Design Institute | Design completed
26 | 300,000-ton methanol production project at Shilin Chemical Co., Ltd. in Wushen Banner, Ordos City | Wuhuan Engineering Company | Design completed
27 | 600,000-ton methanol production project at Guizhou Xinsong Coal Chemical Industry | Donghua Engineering Company | Design completed
28 | 200,000-ton acetic acid production project at Shaanxi Yanchang Yulian | Hualu Technology Engineering Company | Design completed
29 | 600,000-ton methanol production plant at Huating | Donghua Engineering Company | Design completed
30 | 300,000-ton ammonia and 300,000-ton methanol production project at Tongzi | Donghua Engineering Company: Design in progress
31 | 600,000-ton methanol production project at Inner Mongolia Mengda | Donghua Engineering Company: Design in progress
I hope that those of you who have experience with this technology can share their insights on its actual application. Thank you very much!
We are planning to launch a 100Wt methanol project. The original 50WT version used the Luzzi technology, but since the patent fees were too high, we decided to use the Dalian technology. I’m not sure how it will perform in practice; could anyone provide more detailed information on its operation? Does anyone have information on its material flow process? Could you send that to me? Thank you
For us, the technology available in Dalian domestically is already quite good, and we plan to use that technology here as well.
Which organization do you work for? It would be better if you have friends from the Wei River region; they are very skilled at driving, and they are currently working on phase three, again using technology developed by Dalian University of Technology.
The Inorganic Chemical Engineering Teaching and Research Section of the School of Chemical Engineering at Dalian University of Technology has been engaged in research on the simulation, analysis, and optimization of low-temperature methanol washing units since 1983. In 1993, it successfully developed the “Low-Temperature Methanol Washing Unit Simulation System (RPS: Rectisol Process Simulator)”, and this software was continuously improved thereafter, giving rise to the “RPS’95” and “RPS’96” versions. The thermodynamic model in the software combines the Martin-Hou equation of state with the L-K equation of state; some of the gas-liquid equilibrium data come from experiments conducted at Zhejiang University, and the binary interaction parameters were determined through regression analysis. Using this software, simulation analyses were conducted on both the design conditions and actual operating conditions of the low-temperature methanol washing units at Zhenhai Fertilizer Plant, Urumqi Fertilizer Plant in Xinjiang, Ningxia Fertilizer Plant, Dalian Chemical Group Company’s fertilizer plant, Lanzhou Fertilizer Plant, Jiujiang Fertilizer Plant, Weihe Fertilizer Plant, and Shanghai Coking Co., Ltd. A series of recommendations for improving operations and modifying the equipment were put forward, which were well received by the manufacturers. The software development work won the Second Prize for Scientific and Technological Progress as well as the First Prize for Excellent Software from Sinopec in 1988 and 1994 respectively, and the Silver Award for Excellent Engineering Software in 1989. In the course of its research on the low-temperature methanol washing process, the Inorganic Chemical Engineering Teaching and Research Section continued to innovate, successfully developing a new energy-saving low-temperature methanol washing process flow, and creating two patented technologies (patent numbers 94101447.9-4 and 94105767.4-5). Based on these two patented technologies, two process packages were successfully developed: the “10% Capacity Expansion Process Package for the Low-Temperature Methanol Wash Unit at Xinjiang Urumqi Fertilizer Plant” and the “Low-Temperature Methanol Wash Patent Technology Process Package”. In November 1999, it passed the expert evaluation organized by Sinopec in Dalian, achieving domestic leadership and international advanced levels respectively. In the process flow of Patent 1, the methanol circulation volume is more than 10% lower than that of the Linde process, and the cryogenic load is also smaller. This work won the third prize for scientific and technological progress from Sinopec in 2000. Recently, another new patent technology was applied for: \"A new energy-saving low-temperature methanol washing process\", with patent number 01138812.9. This technology represents a further improvement built upon the previous two patent technologies. Its main feature is that the desulfurization section of the absorption tower is divided into two stages, using sulfur-free rich liquid and slightly sulfur-containing semi-poor liquid to absorb sulfides and carbon dioxide respectively ； The sulfur-containing and sulfur-free methanol-rich liquids coming out of the absorption tower are regenerated using different methods ； The stripping tower is divided into three sections, from top to bottom: the washing section, the sulfur-containing solution flashing section, and the sulfur-containing solution stripping section; the solutions in each section are separated from one another ； This process scheme features a low circulation volume of methanol-poor liquid, low energy consumption for thermal regeneration, a low ammonia cooling load (around 30%), and lower investment costs. Based on Dagu’s patents No. 1, No. 2, and No. 3 for low-temperature methanol washing, a patented process flow for low-temperature methanol washing suitable for methanol production plants has been developed. Compared with the typical Linde five-tower process, it has the following features: (1) The larger-scale process uses a six-tower configuration, with one additional tower (C2) compared to the Linde process; this tower is used for hydrogen recovery and consists of two flash sections, without any trays ； And Linde for the five-tower process ； (2) The absorber C1 in the large-scale process is divided into five sections; there is an additional flashing section at the bottom of the absorber compared to the Linde process, and no tray columns are used ； The absorption tower in the Lind process is divided into four sections ； (3) The upper three sections of the large-scale process absorption tower are each equipped with an intermediate cooler ； And the Lind has intermediate coolers only in the first two sections mentioned above ； (4) The CO2 regeneration tower in the large-scale process is divided into four sections: the top section is a flash section without any trays; the second section is the H2S washing section for CO2 gas, and it is equipped with numerous trays; the third and fourth sections are two flash sections, also without any trays ； The CO2 regeneration tower in the Linde process is divided into three sections; the first three sections follow the same general design, with no fourth section ； (5) The heat exchange network in the cold zone of the large-scale process has been improved: there is one less heat exchanger for heat exchange between CO2 gas and sulfur-containing rich methanol, but there is one more cryocooler ； (6) In the large-scale process, the methanol replenishment location is at the top of the methanol-water separation tower, whereas in the Linde process it is in the lean methanol storage tank V4 ； (7) The large-scale process reduces the number of intermediate storage tanks by four compared to the Linde process, resulting in fewer total pieces of equipment, a slightly smaller floor area, and lower equipment investment. (8) The methanol circulation rate in the large-scale process is about 10% lower than that in the Linde process ； The cryogenic load is reduced by about 10% compared to the Linde process ； The thermal regeneration load is reduced by about 10% ； Power consumption is reduced by about 10%. Contact Person: Professor Zhang Shuwei
Phone: 0411-88993979, 13050536002
Fax: 0411-83633080
Email: zswei@chem.dlut.edu.cn
Performance Record
Serial Number | Project Name | Partner Company | Completion Status
--- | --- | --- | ---
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Lanzhou Fertilizer Plant | Sinopec Lanzhou Design Institute | Successfully commissioned
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Inner Mongolia Fertilizer Plant | Wuhuan Engineering Company | Successfully commissioned
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Ningxia Fertilizer Plant | Sinopec Lanzhou Design Institute | Successfully commissioned
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Wushu Petrochemical First Fertilizer Plant | Sinopec Lanzhou Design Institute | Successfully commissioned
Transformation | Coal-to-gas conversion project with low-temperature methanol washing and nitrogen washing for 300,000-ton ammonia synthesis unit at Nanjing Fertilizer Plant | Nanhua Design Institute | Successfully commissioned
Transformation | Coal-to-gas conversion with low-temperature methanol washing and nitrogen washing for 300,000-ton ammonia synthesis unit at Benxi Beigang | Wuhuan Engineering Company | Successfully commissioned
Expansion plan | Expansion and renovation plan for Harbin Gasification Plant | Wuhuan Engineering Company | Design completed
Transformation | Coal-to-gas conversion with low-temperature methanol washing and nitrogen washing for 300,000-ton ammonia synthesis unit at Daha Chemical Plant | Donghua Engineering Company | Design completed
New Construction
9. Ammonia (methanol) production project at Dezhou Fertilizer Plant, 300,000 tons/year | Global Engineering Company | Successfully commissioned
10. New methanol production project at Weihe Fertilizer Plant, 200,000 tons/year | Tianchen Engineering Company | Successfully commissioned
11. Ammonia production project with an annual output of 25 tons in Liuzhou | Sinopec Lanzhou Design Institute | Successfully commissioned
12. Methanol production plant with a daily output of 1,500 tons at Xianghuoju | Donghua Engineering Company | Design completed
13. 300,000-ton methanol project at Daha Chemical Plant | Wuhuan Engineering Company | Design completed
14. 300,000-ton methanol project at Henan Kaixiang | Wuhuan Engineering Company | Design completed
15. 600,000-ton methanol project at XinAo | Tianchen Engineering Company | Design completed
16. 300,000-ton ammonia and 360,000-ton methanol project at Tengzhou Phoenix | Tianchen Engineering Company | Design completed
17. 400,000-ton methanol project for Phase II of Shenmu Plant | Tianchen Engineering Company | Design completed
18. 900,000-ton methanol project at Jiutai Energy | Tianchen Engineering Company | Design completed
19. 400,000-ton ammonia synthesis plant at Linggu | Donghua Engineering Company | Design completed
20. 300,000-ton methanol project at Inner Mongolia Yize Mining | Chengdu Chengda | Design completed
21. 300,000-ton ammonia synthesis project at Inner Mongolia Nailun | Hualu Technology Engineering Company | Design completed
22. 200,000-ton methanol project in Puyang | Lanzhou Design Institute | Design completed
23. 600,000-ton methanol project at Xinjiang Tianfu | Donghua Engineering Company | Design completed
24. 200,000-ton methanol project at Inner Mongolia Menghua Energy Company | Chengdu Chengda | Design completed
25. 300,000-ton methanol project at Anhui Linquan Chemical Co., Ltd. | Lanzhou Design Institute | Design completed
26. 300,000-ton methanol project at Shilin Chemical Co., Ltd. in Wushen Banner, Ordos City | Wuhuan Engineering Company | Design completed
27. 600,000-ton methanol project at Guizhou Xinsheng Coal Chemical Industry | Donghua Engineering Company | Design completed
28. 200,000-ton acetic acid project at Shaanxi Yanchang Yulian | Hualu Technology Engineering Company | Design completed
29. 600,000-ton methanol project at Huating | Donghua Engineering Company | Design completed
30. 300,000-ton ammonia and 300,000-ton methanol project at Tongzi | Donghua Engineering Company | Under design
31. 600,000-ton methanol project at Inner Mongolia Mengda | Donghua Engineering Company | Under design
Phone: 0411-88993979, 13050536002
Fax: 0411-83633080
Email: zswei@chem.dlut.edu.cn
Performance Record
Serial Number | Project Name | Partner Company | Completion Status
--- | --- | --- | ---
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Lanzhou Fertilizer Plant | Sinopec Lanzhou Design Institute | Successfully commissioned
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Inner Mongolia Fertilizer Plant | Wuhuan Engineering Company | Successfully commissioned
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Ningxia Fertilizer Plant | Sinopec Lanzhou Design Institute | Successfully commissioned
Renovation | Oil-to-gas conversion project for 300,000-ton ammonia synthesis unit at Wushu Petrochemical First Fertilizer Plant | Sinopec Lanzhou Design Institute | Successfully commissioned
Transformation | Coal-to-gas conversion project with low-temperature methanol washing and nitrogen washing for 300,000-ton ammonia synthesis unit at Nanjing Fertilizer Plant | Nanhua Design Institute | Successfully commissioned
Transformation | Coal-to-gas conversion with low-temperature methanol washing and nitrogen washing for 300,000-ton ammonia synthesis unit at Benxi Beigang | Wuhuan Engineering Company | Successfully commissioned
Expansion plan | Expansion and renovation plan for Harbin Gasification Plant | Wuhuan Engineering Company | Design completed
Transformation | Coal-to-gas conversion with low-temperature methanol washing and nitrogen washing for 300,000-ton ammonia synthesis unit at Daha Chemical Plant | Donghua Engineering Company | Design completed
New Construction
9. Ammonia (methanol) production project at Dezhou Fertilizer Plant, 300,000 tons/year | Global Engineering Company | Successfully commissioned
10. New methanol production project at Weihe Fertilizer Plant, 200,000 tons/year | Tianchen Engineering Company | Successfully commissioned
11. Ammonia production project with an annual output of 25 tons in Liuzhou | Sinopec Lanzhou Design Institute | Successfully commissioned
12. Methanol production plant with a daily output of 1,500 tons at Xianghuoju | Donghua Engineering Company | Design completed
13. 300,000-ton methanol project at Daha Chemical Plant | Wuhuan Engineering Company | Design completed
14. 300,000-ton methanol project at Henan Kaixiang | Wuhuan Engineering Company | Design completed
15. 600,000-ton methanol project at XinAo | Tianchen Engineering Company | Design completed
16. 300,000-ton ammonia and 360,000-ton methanol project at Tengzhou Phoenix | Tianchen Engineering Company | Design completed
17. 400,000-ton methanol project for Phase II of Shenmu Plant | Tianchen Engineering Company | Design completed
18. 900,000-ton methanol project at Jiutai Energy | Tianchen Engineering Company | Design completed
19. 400,000-ton ammonia synthesis plant at Linggu | Donghua Engineering Company | Design completed
20. 300,000-ton methanol project at Inner Mongolia Yize Mining | Chengdu Chengda | Design completed
21. 300,000-ton ammonia synthesis project at Inner Mongolia Nailun | Hualu Technology Engineering Company | Design completed
22. 200,000-ton methanol project in Puyang | Lanzhou Design Institute | Design completed
23. 600,000-ton methanol project at Xinjiang Tianfu | Donghua Engineering Company | Design completed
24. 200,000-ton methanol project at Inner Mongolia Menghua Energy Company | Chengdu Chengda | Design completed
25. 300,000-ton methanol project at Anhui Linquan Chemical Co., Ltd. | Lanzhou Design Institute | Design completed
26. 300,000-ton methanol project at Shilin Chemical Co., Ltd. in Wushen Banner, Ordos City | Wuhuan Engineering Company | Design completed
27. 600,000-ton methanol project at Guizhou Xinsheng Coal Chemical Industry | Donghua Engineering Company | Design completed
28. 200,000-ton acetic acid project at Shaanxi Yanchang Yulian | Hualu Technology Engineering Company | Design completed
29. 600,000-ton methanol project at Huating | Donghua Engineering Company | Design completed
30. 300,000-ton ammonia and 300,000-ton methanol project at Tongzi | Donghua Engineering Company | Under design
31. 600,000-ton methanol project at Inner Mongolia Mengda | Donghua Engineering Company | Under design
Are you from that factory? Is it from Yankuang?
One of my clients originally chose Luchi, but later switched to Dagong
We should support products made by Chinese companies; Linde and LUCI both have defects. Dalian University of Technology needs to do a better job!
Dalian University of Technology only provides process software packages; it is not clear whether the university currently collaborates with any engineering company to put its patented technologies into practical use.
The low-temperature methanol washing unit at Puyang Longyu has also been successfully commissioned; it is currently undergoing technical upgrades, as some aspects of its design are not optimal. . .