The appearance of 19 14 porcelain Raschig ring indicates that the packed tower has entered the era of scientific development.
19 14 the appearance of the first generation of Raschig ring with structured packing makes the development of packed tower enter a scientific track.
The appearance of Rachig ring in 19 14 marks the birth of the first generation of random packing, but the actual production effect has not been greatly improved, and people begin to realize the importance of vapor-liquid distribution performance to the operation of packing tower.
The appearance of Steedman packing in 1937 makes packing and packed tower enter a modern development period.
After 1950, the packed tower entered a slow development period. During this period, people paid attention to the study of the internal components of the tower, trying to solve the amplification problem of the packed tower. However, due to the emergence and successful application of various plate towers, packed towers have been neglected.
Danckwerts is in 195 1 year [on the other hand, it is unreasonable to assume that vortex stays on the interface for a fixed time in the infiltration theory, especially for stirred tanks, packed towers, bubble towers and spray towers, bubbles and droplets have a wide scale distribution, and the infiltration theory has been improved, and the surface renewal theory has been put forward.
1964 international distillation conference thinks that the liquid distribution is uneven after the packed tower is enlarged.
1966 The first Sulzer packed tower for separating heavy water was put into operation in France.
Since 1966, many net wave packed towers have been established in the world. More than ten years' practice has proved that storm wave packing has the advantages of high efficiency, large load, low pressure, small liquid stagnation star, almost no amplification effect and easy machining, and its application has developed rapidly.
1969, Viviantl fixed the packed tower on the rotating arm of a large centrifuge, and measured the influence of centrifugal acceleration on mass transfer efficiency for the first time.
1970 the first screen corrugated packing tower in China was built, and it is estimated that hundreds of screen corrugated packing towers have been put into production in the past 20 years.
197 1 year, SPAAY et al. studied the characteristics of two-phase flow, axial mixing and mass transfer in pulsed packed column in detail by using Raschig rings with different materials and sizes, and gave the empirical correlation between characteristic velocity and droplet diameter.
1972 Sulzer has built 12 CY packed tower, and it has been running successfully.
Starting from 1972, the packed tower used in the world sulfuric acid manufacturing with Europe and America as the center has been gradually changed into ceramic step ring, and the total number can reach 100, including new construction.
Therefore, 1973 put forward the scheme of washing tail gas with water in limestone packed tower in May.
Turbulent ball tower can be used not only for acetylene cooling, cleaning and neutralization, but also for water washing tower, which is the first in domestic PVC production and has strong adaptability to areas with weak anti-corrosion ability.
1977 Simonsl introduces the application of pulse packed column in the production of hexyl phenol amine, and points out that the mass transfer efficiency of pulse packed column has nothing to do with the column diameter and whether there is reaction in the column, so it has the advantage of easy amplification.
1980 The experiment of the packed tower with stepped ring was started in May, and it was successful.
1980, Merchu used packed column as oxygenator, and measured the mass transfer performance of several smaller packings, and tasted the blood oxygenation process.
1April, 1982, in the oil washing tower with a diameter of 5.3m and the water washing tower with a diameter of 5. 1m, the upper float valve tray was changed into a packed tower filled with tulloch metal packing.
In the process of popularizing new technology, Tianjin University Packed Tower New Technology Company has also developed rapidly, from zero capital of 1985 to a medium-sized enterprise with assets of more than 30 million yuan. After the establishment of the research and promotion center, the profit and tax of 1990-1995 * * is 35 million yuan.
At the end of 1986, some equipment was reformed and the floating valve tower was replaced by a packed tower.
After the successful trial run of 1987 on New Year's Day, it is proved that the packed tower does have many advantages, but there are also some problems. "Industry-University-Research" combined with promoting the transformation of scientific and technological achievements "Research and Promotion Center for New Packed Tower and Efficient Packing" Tianjin University Packed Tower New Technology Company Tianjin University developed the technology of "New Tower Internals and Efficient Packed Tower", 1987 won the third prize of national scientific and technological progress, and 1989 was listed as the first batch of national key promotion projects by the State Science and Technology Commission.
In 1988, the experience of changing the phenol refining extraction tower into a new type of packing also changed the turntable tower into a stepped ring packing tower.
1989 carried out technical transformation on the flat-curved tower, from the original internally driven rotary table tower to a short-distance stepped annular packed tower. After demonstration, the plate tower was transformed into a high-efficiency packed tower during the overhaul of 1989.
1990 With the approval of China State Science and Technology Commission and State Education Commission, a national industrial research and promotion center "Research and Promotion Center for New Packed Tower and High Efficiency Packing" was established in Tianjin University.
During the energy-saving technical transformation of 80,000 tons of synthetic ammonia in 1990, two decarbonization towers were changed into packed towers, and the decarbonization production was greatly improved after the transformation.
1990 the state science and technology commission established the national research and promotion center of packing tower and internals technology in Tianjin university packing new technology company, and was listed as the supporting unit of the national key promotion project of scientific and technological achievements in the eighth five-year plan.
1990 the state science and technology commission established a national-level chemical packing tower and internals technology promotion center in Tianjin university packing new technology company.
199 1 At the beginning, the packed tower was flooded for this reason.
199 1 after the technical transformation of high-efficiency packed tower, the discharged water quality reached the standard, methanol was recovered, the environment was protected, and methanol consumption was reduced.
199 1 year, Tianjin university packing tower new technology company introduced Sulzer MELLAPAK automatic production line and independently developed aluminum-plated corrugated carbon steel packing. Tsinghua University and Shanghai Research Institute of Chemical Technology have developed calendered screen corrugated packing respectively. China Petrochemical Luoyang Engineering Company developed LH structured packing.
As early as 199 1, Tianjin University established Tianjin University Packed Tower New Technology Co., Ltd. relying on the advantages of chemical industry in packing technology, and transformed nearly 10,000 kinds of towers nationwide, which achieved great economic benefits.
1993 at the end of the third quarter, the main equipment was delivered to the factory by the manufacturer, and at the same time, the auxiliary equipment such as biphenyl furnace, wave stop valve, reducer transmission device, frequency converter, electrical control box, casting tank, process pipeline, metering pump and packing tower also arrived at the factory one after another. However, with the development and progress of vegetable oil refining process, FH company began to use the newly developed structured packing tower in vegetable oil deodorization process from 1993.
1994, we reformed the original packed tower. In the design process, we summarized the transformation and operation of the old system equipment such as floating valve and sieve plate composite tray, and improved it by adding a cyclone demister.
1996, after investigation and study, it was decided to adopt the patented technology of Shijiazhuang Zhengyuanta Development Company, and take the opportunity of overhaul to transform the saturated hot water tower in the shift section from the original packed tower to a new efficient vertical plate tower.
At the beginning of 1996, although we took the following measures in the operation of crude benzene plant with metal orifice plate, we obtained corrugated packed towers instead of four wooden towers, but the effect was good because of low steam pressure.
65438+1September, 1997, Tiancai Information System Engineering Company, Tianjin University Packed Tower New Technology Company and Tianjin Huatong High-tech Company, which were run by Tianjin University, 707 Research Institute of China Shipbuilding Corporation, Tianjin University Career Development Corporation, Tianjin Economic Construction Investment Group and Hainan Qionghai Agricultural Products Trading and Wholesale Center, were reorganized as a whole, and then Tianda Tiancai Company was jointly established by seven institutions.
1997 company improved this: the tail gas was cooled, filtered by two-stage buffer and two-stage packed tower, and then introduced into the synthesis furnace.
1997 Tianjin University, as the main sponsor, initiated the establishment of Tianda Genius with the operating net assets of Tianjin University Packed Tower New Technology Company and other companies of 65 million yuan, of which the net assets of Packed Tower New Technology Company were 27.8 million yuan, accounting for 42.7% of the total investment.
1997 was listed on Shenzhen Stock Exchange with Tianda Tiancai, and was restructured into Tianjin Tianda Tiancai Co., Ltd. Packing Tower New Technology Branch, and in June 2000, it was restructured into Tianjin Tianda Tianjiu Technology Co., Ltd.
1July, 1998, the packed tower was reformed, and obvious results were obtained. 1July, 1998, the demethanizer was changed into a packed tower.
In August, the atmospheric and vacuum distillation unit 1998 of China crude oil with a maximum capacity of 5 million tons/year, designed by Tianda Tiancai Company New Technology Branch, Tianda Chemical Engineering Institute and Maoming Petrochemical Company Design Institute, was successfully started in Maoming, Guangdong Province, making Maoming Petrochemical Company's refining capacity reach13.5 million tons/year, making it the first 10 million-ton refining base in China.
The three-phase distillation process of 1999 packed tower will not significantly reduce the mass transfer efficiency under certain conditions.
1999, the resistance of post-washing benzene tower gradually increased, especially the resistance of Garland packed tower reached 3000Pa, which increased the load of gas blower. After the blower, the gas pressure rises more than the rated value for many times, so it is necessary to stop the tower frequently for cleaning.
In 2000, the start-up cost of packed column for ethylbenzene production was high and the separation efficiency was low. The reason is that the disc separator in the tower has low permeability, and the processing capacity per hour is only 4.25 tons, which can not meet the processing standard of 6 tons. The reason is that the wall flow of the tower is not used.
In 2000, Nanjing Refinery adopted packed tower technology to transform the trimellitic distillation column, which expanded the production capacity of the unit and greatly improved the processing capacity of the unit.
During the overhaul in 2000, the circulating acid in the purification system was precipitated once, overflowed to another circulating tank, and entered the packed tower after being pumped into the plate cooler.
In April 2000, the desorption tower was completely reformed, and the original floating valve tower was changed into a packed tower.
200 1 It was found for the first time that methyl chloride was produced in glyphosate production, and the correct reaction mechanism was put forward. The DCS automatic gas supply balance system with a new type of corrugated packed tower as the core and multi-stage water washing, alkali washing, adsorption and drying technologies were developed, and the purification recovery rate was over 95%, which successfully solved the problems of many gas production points, unstable gas production and many impurities in recovered methyl chloride.
In 200 1 year, the domestic air separation equipment market below 20000m ~ 3/h, represented by packed tower, argon production by total rectification and internal compression process, is occupied by major enterprises such as Hangzhou Oxygen, Open Control, Sichuan Control and China Air Separation.