Oil Recycling Plant
Industrial oil recyclingTime:2016/08/11
Industrial waste oil:
First, the use of oil in the mixed moisture, dust, impurities such as metal powders and other miscellaneous oil produced by mechanical wear and tear;
Second, the gradual deterioration of oil to produce organic acids, resins and asphalt-like substance. Waste oil regeneration, that is, by sedimentation, distillation, acid, caustic washing, filtration, etc. to remove impurities in the oil.
Filtration treatment of industrial waste oil are the following:
1. Settlement of the oil was allowed to stand, and separated from impurities fall. The settling time is determined by the oil and the oil temperature. The higher the oil temperature, the smaller the viscosity, the easier the impurities fall, the shorter the settling time. Usually oil impurities settling time relationship with the temperature of the following table.
2. The distillation treatment to remove waste oil after settling the precipitate was placed in a distillation flask. Installed distillation apparatus, heating atmospheric distillation. At 180 ℃ distillate is gasoline fraction is 180 ~ 360 ℃ diesel oil is left behind. If there is no petrol, diesel oil and other impurities in the waste oil is known, this step can be omitted.
3. pickling the settlement, after distillation of oil into a large beaker and heated to 35 ℃, stirring slowly added accounted for about 6 to 8% of the oil volume of concentrated sulfuric acid (added over 30 minutes). In this case, the waste oil with concentrated sulfuric acid in the gum, asphalt-like impurities sulfonation reaction. To remove these impurities, the sulfonated, added 1% by volume of oil accounting for 10% caustic soda solution, from the coagulant effect, accelerated delamination impurities. Alkali stirring for 5 minutes, allowed to stand for some time, it appeared obvious stratification, the upper oil yellowish green, no black particles and other impurities.
4. Caustic this step is to remove waste oil and organic acids and sulfuric acid pickling residues under. The pickled oil is added to another beaker and heated to 90 ℃, stirring slowly added 5% oil by mass sodium carbonate powder, 20 minutes after the test oil acidity. Take two test tubes, each added 1mL of distilled water, add 2 drops of which a phenolphthalein, another add 2 drops of methyl orange reagent. Then refuel in two test tubes were kind 1mL, and shaken for 3 minutes, if two test tubes aqueous layer color change, indicating that the oil is neutral, then the oil should become clear.
5. The filter oil filter filtration industry. Household oil can be used repeatedly 4 to 6 layers of silk filter 2 to 4 times, that was qualified oil. If you know a variety of impurities in the waste oil ingredients, the above steps can be adjusted according to the actual situation. For example, in the oil containing only metal shavings and other solid impurities can be separated by sedimentation. If only mixed with gasoline, diesel and other substances in the oil, as long as by distillation, can be regenerated oil. If only the oil is oxidized and deterioration, as long as the acid, caustic washing to remove impurities and other organic acids.