Up to now, the results of this project have been applied in dozens of domestic enterprises, with an accumulated recovery of 670,000 tons of organic solvents, reduction of nitrogen oxides by 404,000 tons, and resource-based production of 50% of nitric acid by 1.125 million tons, saving at least 20,000 tons of standards. The steam generated by coal accounts for a cumulative increase of 13 billion yuan in production value. The project has won 12 national invention patents.
The Separation Engineering Research Center of Nanjing University takes the separation of chemical mixtures in the development process industry as its mission. It took 10 years to achieve a breakthrough in the research and application of new separation technologies for energy-saving and emission reduction towers. Based on the non-equilibrium thermodynamic entropy increase rate function, the researcher directly correlates the entropy increase rate of the plate with its specific structural parameters, and proposes an energy-saving new structural plate design method. This new method is the first in the history of plate research at home and abroad. Engineering tests have shown that compared with the traditional guided trapezoidal valve trays, the super-valve trays developed based on this new method have a pressure drop of only 42% that of conventional trays and an average 36% increase in the efficiency of liquid plates. The flexibility of operation is 1.67 times that of conventional trays, and its use in industry can significantly increase separation efficiency and reduce energy consumption.
On this basis, the research group has also developed a new process equipment for nitrogen oxide exhaust gas treatment and a new high-tech recovery equipment for organic solvent dimethylacetamide in the spinning process. The results of industrial application of these two equipment indicate that more than 99% of the nitrogen oxides active components in industrial waste gas can be captured and recycled into nitric acid, and the nitrogen oxide content in the exhaust gas is much lower than the national standard requirement of 50 mg/m3; The dimethylacetamide completely satisfies the production of high-quality spandex polymer fibers with a recovery rate of more than 99.5%. The purity of the product and the content of water, alkali and acid are the best in the same international technology.
At present, China is facing a severe energy conservation and emission reduction situation. The high-precision separation of chemical substances in process industries, the effective use of fossil fuels and raw materials, and the recycling of chemical substances in the “three wastes†are all urgently needed for efficient separation technologies.
Dry weather is the "culprit" of cold
"The child has been suffering from a cold for more than two weeks. He has a fever and a runny nose. At first, I thought he had a common cold, so I went to the nearby clinic to buy medicine, but it didn't work. Now the child not only coughs, but also has blisters on his mouth and nosebleeds at night. This year has passed without much comfort..." at a maternal and child health care hospital in Chaoyang District, Beijing, The child's parents, Ms. Zhao, said in distress.
According to the pediatrician of the hospital, there is a high incidence of respiratory diseases in children this winter. The main reason is that the weather is dry this year, there is no snow, and there are many bacteria and dust in the air. From the reception situation, the patients are basically mycoplasma infection or chlamydia infection, including many cross infections.
Zhang Xingchao, deputy director of internal medicine of Beijing hospital, introduced that due to the low air humidity, the influenza virus propagates faster in a dry environment and survives on floating dust, which will accelerate the spread of cold. However, due to the failure of "wet deposition", it will also cause serious urban air pollution and easily lead to respiratory diseases such as asthma and pneumonia.
The medical staff of the cardiovascular department of Beijing Municipal People's hospital told reporters that since the beginning of winter, there has been a long drought without rain (snow), the weather is warm and dry, and people's life is irregular during the Spring Festival, resulting in changes in human physiological functions, slow blood flow speed and increased blood viscosity. Middle-aged and elderly patients with hypertension and hyperlipidemia are prone to cerebrovascular spasm, coronary heart disease and other diseases. These diseases have strong concealment, sometimes come quickly and seriously, and are easy to lead to sudden death. Before and after the Spring Festival, the number of middle-aged and elderly patients with cardiovascular disease increased abnormally, especially the elderly over 65 years old.
Wang, director of cardiovascular department of Beijing Municipal People's Hospital, reminded that in the current extremely warm and dry weather environment, the effective way to prevent cardiovascular disease is to drink more water, eat less meat, exercise more and keep warm. Especially the middle-aged and elderly people with "three high" should pay special attention
Experts suggest that in a dry environment, Aroma Diffuser can be used to alleviate air drying, moisturize the skin and solve the problem of drying
Oil humidifier diffuser, Glass essential oil diffuser, Smart diffuser oil, Diffuser essential oil, Essential oil diffuser
Shenzhen Ewong Technology CO.LTD , https://www.ewongteches.com