engine oil, that is, engine lubricating oil, can play the roles of lubrication, cleaning, cooling, sealing, reducing wear, rust prevention and corrosion prevention. As far as construction machinery and equipment are concerned, engine oil is equivalent to human blood, which is closely related to the health of the whole equipment. As we all know, once human blood deteriorates, it will cause pathological changes, which will lead to various diseases and even threaten our lives. After long-term use, engine oil will produce sediment, sludge and paint film, which will lead to deterioration. These substances will be deposited on the surfaces of friction parts, lubricating oil circulation channels and filters, and will also cause various machines. The difference is that human blood can be constantly regenerated and kept fresh and pure. Therefore, it is necessary for construction machinery to change oil frequently to ensure the healthy operation of equipment. Waste oil refers to the waste lubricating oil replaced from various construction machinery, vehicles and ships. With the continuous progress and rapid development of China's industry, the number of various construction machinery, vehicles and ships is increasing, and the demand for engine oil is increasing. Waste engine oil is famous for its huge output, but it is dumped or burned recklessly every year in order to get rid of it. This is not only a large-scale environmental pollution problem, but more importantly, it involves the energy crisis in China, so the treatment of waste lubricating oil is an important topic worthy of attention. So how should we treat waste oil correctly? Where did the gutter oil go? According to estimates, at present, all kinds of construction machinery and equipment, automobiles, ships, planes, trains and other large machinery in China produce 25-31 million tons of waste oil every year. In fact, these waste lubricating oils, after proper technological treatment, can become regenerated lubricating oils in addition to deteriorated components and foreign impurities and pollutants. From the point of view of technology, environmental protection, rational utilization of resources and economy, this method is a suitable treatment method. However, according to the statistics of relevant departments, the recycling rate of waste oil is only 21%, so where did these waste oils go? First of all, discarded gutter oil has been in a "waste" position because of its unusually low economic value after being replaced. People often don't pay much attention to a small amount of waste oil, so they pour it into rivers, open spaces or garbage bins. This method will cause serious pollution to the environment and waste resources. Research shows that a bucket (volume 211L) of gutter oil poured into water can pollute the vast water surface of 3.5 square kilometers. More seriously, the lubricating oil contains polycyclic aromatic hydrocarbons such as 3,4-benzo (PAH) (mainly in mineral base oil), which has been proved to have a strong carcinogenic effect. Chlorine-containing polycyclic aromatic hydrocarbons, such as polychlorinated biphenyls (PCB), are also substances with strong toxic effects on people. Organic compounds such as heavy metal salt additives and extreme pressure antiwear agents containing chlorine, sulfur and phosphorus contained in lubricating oil are harmful to human beings and organisms. When these substances are mixed into water, they may eventually endanger human health through various channels. Second, combustion At present, using waste engine oil as fuel is also a common treatment method. Many construction sites will mix waste engine oil with other construction wastes that need to be burned, and burn them to destroy these buildings. These waste engine oils can produce good combustion-supporting effect, and this treatment method is also very harmful to the environment. Although the government has repeatedly stopped it, many unscrupulous builders still do it secretly to save trouble. Three. Recycling In recent years, the recycling technology of waste engine oil began to spread to the people, and many large and small refineries began to appear in the market. They will personally go to the construction site to recycle waste engine oil and then transport it to the refinery to make waste oil. Inferior waste engine oil is made into fuel oil by distillation, cooling, bleaching and other "renovation" means, and then blended with regular national standard oil according to the proportion of one third or even one half, which is the source of inferior diesel oil. The waste engine oil with good quality is treated by proper process to remove deteriorated components and foreign impurities, and becomes regenerated lubricating oil, which is then packaged and sold to the engine oil market. Although this method has always been a reasonable way to deal with all aspects, the manufacturing technology and methods of most small traders can not be accurately controlled and strictly required, and the quality of the oil products produced does not meet the standards, which is also the reason why all kinds of fake brand-name oils flood the market. Fourthly, channel oiling sprays waste oil on the road surface which is easy to produce dust, and uses its adhesion to stick the dust, which plays a role in dust prevention. It is also a treatment method of waste lubricating oil. In the United States, a considerable amount of recovered waste lubricating oil is used for this purpose. However, when it rains, the waste oil sprayed on the road surface will also be washed away by the rain, flow into the drainage ditch, and finally enter the river to pollute the water quality, or enter the soil to pollute the soil, thus polluting the environment. How to deal with waste oil correctly? It is undoubtedly the most appropriate way to recycle the replaced waste lubricating oil, which can not only make full use of resources, but also bring considerable economic benefits and avoid environmental pollution caused by random discarding. In addition to those illegal private refineries, there are regular refineries recognized by the state all over the country. The oil products recovered by these manufacturers can meet the national standards, and users can buy the refined oil products with confidence. If these gutter oil flows into the hands of illegal traders, it will greatly disrupt the oil market and ultimately hurt ourselves. The wonderful use of waste engine oil can also lubricate parts with low requirements for lubricating oil. For example, mechanical metal hinges such as the chain of our bicycles, the cab locks of excavators, loaders and other equipment can be coated with waste oil to achieve the effects of lubrication, friction reduction and rust prevention. In the construction site, waste oil can be used on building formwork to prevent the formwork from sticking to cement, and it can also play a role in rust prevention and corrosion protection. Although diesel oil extracted from waste engine oil may damage the fuel system of vehicles, it is not a big problem to use it on the stoves of catering enterprises or some machinery factories. Moreover, the price of fuel extracted from waste engine oil is much cheaper than the gas on the market, and some catering enterprises and machinery factories are also willing to use this fuel.