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A kind of purification and recovery process of vocs engine oil rinsing and absorbing liquid
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A technology of absorbing liquid and rinsing, which is applied in the petroleum industry, refining hydrocarbon oil, refining waste oil, etc., and can solve problems such as reduced absorption capacity, uneconomical, and unenvironmental protection
Active Publication Date: 2021-01-08
杭州立佳环境服务有限公司
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Abstract
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Problems solved by technology
However, the absorption capacity of the engine oil will decrease after a period of use, so it can only be discarded as waste oil, which is neither economical nor environmentally friendly
Method used
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Embodiment 1
[0018] Take 2 tons of waste engine oil (that is, VOC S engine oil washing absorption liquid) into a 5-ton reaction kettle, then add 2 tons of 1-methyl-2-pyrrolidone, stir and heat, start timing when it reaches 40°C, control the temperature in the range of 40-50°C, and stir for 30 minutes. Keep warm in the temperature range of 40-50°C, keep the layers static (for about 30-45 minutes), and remove the 1-methyl-2-pyrrolidone in the lower layer.
[0019] Add about 1.8 tons of 1-methyl-2-pyrrolidone into the above reaction kettle again, stir and heat, start counting when it reaches 40°C, control the temperature in the range of 40-50°C, and stir for 30 minutes. Keep warm within the temperature range of 40-50°C, keep the layers static (about 30min), and separate the 1-methyl-2-pyrrolidone in the lower layer.
[0020] In the above-mentioned reaction kettle, add about 45kg of activated alumina under stirring conditions, heat to 75°C and stir for 50min. Filtration was carried out while...
Embodiment 2
[0026] Take 2 tons of waste engine oil (that is, VOC S engine oil rinsing and absorbing liquid) into a 5-ton reaction kettle, then add 2 tons of 1-methyl-2-pyrrolidone, stir and heat, start timing when it reaches 40°C, control the temperature in the range of 40-50°C, and stir for 30 minutes. Keep warm in the temperature range of 40-50°C, statically separate layers (about 30-45min), and remove the 1-methyl-2-pyrrolidone in the lower layer.
[0027] Add about 1.8 tons of 1-methyl-2-pyrrolidone into the above reaction kettle again, stir and heat, start counting when it reaches 40°C, control the temperature in the range of 40-50°C, and stir for 30 minutes. Keep warm within the temperature range of 40-50°C, keep the layers static (about 45min), and separate the 1-methyl-2-pyrrolidone in the lower layer.
[0028] In the above reaction kettle, add about 60kg of active alumina under stirring, heat to 80°C and stir for 60min. Filtration was carried out while it was hot, and the filtr...
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Abstract
The invention relates to an absorbing liquor recycling process, in particular to a purifying and recycling process for VOCS engine oil drip washing absorbing liquor. The inventor selects 1-methyl-2-pyrrolidone as an extracting agent through comparative test with solvents such as furfuryl alcohol, and the maximum extracting rate can be achieved. The purifying and recycling process for VOCS engine oil drip washing absorbing liquor comprises the following steps: fully stirring for 30 min at the temperature of 40-50 DEG C, wherein the 1-methyl-2-pyrrolidone can fully dissolve useless components inwaste engine oil; insulating and standing for about 30-45 min at the temperature of 40-50 DEG C so that a 1-methyl-2-pyrrolidone layer can be effectively separated from an engine oil layer within a short time. A two-time extracting method is adopted, the useless components of the engine oil layer can be separated out thoroughly, the using amount of activated aluminium oxide can be reduced, and waste residues are reduced. The engine oil treated by the process can be recycled and reused.
Description
technical field [0001] The invention relates to an absorption liquid recovery process, in particular to a VOC S Purification and recovery process of engine oil rinsing and absorbing liquid. Background technique [0002] Since the 20th century, the rapid development of science and technology has promoted economic development and improved people's living standards. However, at the same time, human beings have also paid a heavy price. During the production, storage, and use of petrochemical, pharmaceutical, and pesticide industries, a large amount of organic waste gas will be generated, polluting the production workshop and the air environment. This kind of waste gas is discharged into the environment, causing great harm to the environment and human health. Therefore, it has attracted great attention from scientists all over the world, and it is extremely urgent to solve this problem. At present, the treatment methods of volatile organic compounds can be roughly divided into ...
Claims
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Application Information
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