According to the July 16 news, Hebei Sanhe City Fuhai Special Equipment Manufacturing Co., Ltd. developed a set of pollution-free plastic can be achieved flexible oil-based process equipment. Its research and development success, cracked the problem of plastic waste disposal, to achieve the process of pollution-free, while the garbage energy, the birth of waste plastics greater value, and after a simple processing, 98% of the raw material oil will become for production and living Of diesel or gasoline, oil quality to meet national standards.
In May 28 this year, the State Council Development Research Center "waste plastics energy utilization research" seminar, this process has been the Ministry of Environmental Protection Solid Waste Management Center, National Development and Reform Commission, Tsinghua University experts recognized. Among them, the Chinese Academy of Engineering, Tsinghua University, Institute of Chemical Science and Technology, said Jin Yong: "The whole set of equipment in the craft originality, clever idea.
Non-polluting waste plastic flexible oil refining equipment R & D success (photo irrelevant)
The first "flexible" process, the oil rate as high as 95%
Waste plastic change oil, the equivalent of a reverse reaction process.
"Plastic is the olefin in the oil molecules through the polymerization reaction of polyethylene, polypropylene and other products." Li Yong said that the waste of plastic has been polymerized macromolecules, at high temperatures for cracking reaction, molecular chain fracture, depolymerization into small Molecules, olefins small molecules can be converted into gasoline and diesel.
Although the direction of plastic oil is well known, it is also possible in theory, but how to achieve pollution-free, high oil rate and achieve industrialization and continuous production, become an urgent need to crack the world problems. China has been in this area for more than 30 years of research, has not been a breakthrough.
"The difficulty is that plastic oil is a complete set of system equipment, involving refining, machinery manufacturing, industrial design, automation and control of a number of professional, in the specific test process, a process details or equipment parameters of the adjustment bias, will lead to the entire Chain of disorder, and before there is no experience can learn from. "Li Yong said.
I was surprised that the break through the technical gaps in the Fuhai company, was actually a native of Sanhe City, a private enterprise. Li Yong from the beginning of 2010 to study plastic oil technology, in the visit China University of Petroleum, Beijing University of Chemical Technology and other relevant experts, has invested more than 4000 million, after continuous test summary, in June 2013 the first in the country developed This set of equipment. Li Yong named it "non-polluting waste plastic flexible oil refining process."
Why is it called flexibility? Facing the author's question, Li Yong said: "Flexibility is my own name to the craft, the chemical industry does not have this technical term."
Li Yong, flexible technology compared to other plastic oil technology, the most direct difference is that the entire process from low to high three kinds of temperature, slow on the waste plastics cracking oil, rather than "soil refining" to take the high temperature quickly Cracking reaction, the rapid gasification of plastic. "After the plastic oiling process, chemical reaction is fierce, our technology, chemical reaction is soft, so called flexible."
Waste plastics into gasoline and diesel process generally include: plastic crushing - low temperature depolymerization liquefaction - solid-liquid separation dry distillation - high temperature heating slurry - catalytic cracking gasification - condensation separation - refined oil. This process in November 2013 through the Office of the Office of the new products and new technology identification of the acceptance, the performance of the leading domestic, can achieve mass production.
"Other domestic waste oil and petrochemical process, in the whole process is difficult to the reaction temperature of raw materials for low and medium range control, the reaction temperature mostly between 360 ℃ -600 ℃, always high operation." Li Yong explained that the flexible oil Chemical process through reasonable control of temperature, pressure and other reaction conditions, so that waste plastics at 200 ℃ -250 ℃ began cracking reaction, and gradually transition to high temperature, step by step on the classification of various types of oil collection, to avoid excessive pyrolysis caused by coking , Polycondensation reaction aromatization, reducing the coking rate of raw materials, reducing the amount of impurities in the oil.
"The whole process is not only conducive to the production of oil," Li Yong said, "and the oil rate is high, up to 95%."
Crack the "fluid" problem, the waste of wealth will become waste
In Fuhai Company's plastic oilification workshop, the waste plastic enters the feed port and is pre-treated and transported to the highest installation of the equipment - the heating furnace, and then from top to bottom through the pyrolysis reactor, catalytic reactor, fractionation Tower, cooling tower treatment, raw material oil from the end of the export outflow.
The whole process seems to be a matter of course, but the R & D need to crack a difficult problem, waste plastic fluid is one of them.
The traditional use of waste plastic oil in general there are two ways. The most simple and most of the "soil refining" is used in the method of thermal cracking, the waste plastic into the high temperature heating furnace for thermal cracking, the disadvantage is the high reaction temperature, long time, energy consumption, discharge a lot of waste gas. Another method is catalytic cracking, the catalyst and waste plastic mixed together for heating, fast response, low energy consumption, but more oil impurities.
"As the plastic is a bad conductor of heat, the use of these two methods, in the high temperature furnace, close to the furnace wall of the plastic will be quickly carbonized, a little further away from the furnace plastic has not fully liquefied, plastic can not charge solution, So it will cause the oil rate is low, poor quality of oil products. "Li Yong said that the more important is that these two process equipment can only use intermittent operations, can not be industrialized continuous production," that is, a furnace plastic After the pyrolysis, you must wait for the furnace and then add the material, before the furnace should also be attached to the wall of the attached material to clean up.
However, the flexible oiling equipment uses a special liquid slurry process, through reasonable control of chemical reaction conditions, the process of recycling, so that the entire process of plastic to achieve full fluid fluidization. "Liquidized plastic is not easy to cause the pipeline blockage, will not form a large number of attachments in the device wall, to avoid the cleaning equipment can only intermittent operation problems, greatly improving the efficiency of processing." Li Yong said that the current set Equipment daily processing of plastic waste up to 300 tons.
In order to achieve continuous treatment of waste plastics, they also developed a "pressure dense closed feed port device", the raw materials in the heating furnace to promote the same time, the pump immediately closed the mouth, "side push side sealed, to achieve the entire process Of the closed and continuous operation.
The breakthrough of the flexible oiling process opens up a new path for expanding energy. Li Yong introduced, compared to crude oil refining into gasoline and diesel 60% -70% ratio, plastic oil production of raw oil, 98% can be refined into gasoline and diesel. "A ton of plastic oil production of gasoline and diesel, equivalent to 2.2 tons of crude oil.
At present, the utilization rate of waste plastics in developed countries is more than 70%, while the domestic waste plastics recycling rate is only 22%, which means that China's annual production of more than 30 million tons of waste plastics are wasted, not only a waste of resources, And pollute the environment.
"If the use of flexible oil refining process, these plastics will become wealth." Li Yong calculations: If the technology to achieve industrialization, the annual use of waste plastics can produce more than 2000 million tons of diesel, the market price of More than 2000 billion yuan, equivalent to reduce the use of 60 million tons of crude oil to extract diesel, equal to 70% of the annual imports of crude oil, Daqing Oilfield than the year the peak value of 55 million tons of oil is also high, equivalent to the country found a new "Daqing Oilfield". "And because of the wide range of raw materials, this 'oil field' will be all over the country, neither pollution of the environment, nor change the geological structure.
Using closed and non-oxidized way, the process of near-zero pollution
Clear and transparent, light **, and petrol station gas station no different. July 16, Fuhai company in the renewable energy equipment and technology research institute, I saw the waste plastic "change" into the gasoline.
"After the Petrochemical Research Institute of the detection analysis, the oil's flash point, density, viscosity, ash and other indicators are higher than the national standard.