Fuel oil preparation technique utilizing waste plastics

Abstract

The invention discloses a fuel oil preparation technique utilizing waste plastics. The preparation technique comprises the following steps: the waste plastics are chopped, the chopped waste plastics are added into a cracking kettle, a catalyst and quartz sand are added, and the materials are heated at a heating rate of 5 to 10 DEG C per minute after uniform stirring and mixing; the materials are heated within different temperature ranges through temperature control to achieve a slow reaction, and condensates within the different temperature ranges are respectively collected; after the mixed cracking reaction is completed, the collected liquid fuel oils are respectively sent to a rectifying tower for rectification, and fraction products within the different temperature ranges are respectively collected; the fractions captured from the rectifying tower respectively undergo extraction separation through a complexation extraction solvent. The technique provided by the invention has the advantages that the quartz sand is added into the reaction kettle, so as to achieve uniform heating of the reaction materials, enlarge the reaction contact surface, and reduce the phenomena of wall sticking and coking of the materials under a high temperature; the fuel oil yield is high, and the fuel oil quality is stable; the technique is simple to operate, so as to facilitate scale production.

Description

technical field [0001] The invention relates to a preparation process for preparing fuel oil from waste plastics, belonging to the field of petrochemical industry. Background technique [0002] With the advancement of polymer synthesis technology, the development of the plastics industry has provided humans with a variety of plastic products. With its advantages of light weight, corrosion resistance, easy processing and molding, low cost, and convenient use, plastics are widely used in many industries of the national economy. From industrial and agricultural production to basic necessities of life, plastic products have penetrated into every corner of society. It has entered into various fields of people's production and life, and its quantity is astonishing. At present, the plastic products in the world are about billions of tons, and its value has exceeded the consumption of steel. With the vigorous development of the plastics industry and its large-scale use, waste plast...

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Problems solved by technology

With the vigorous development of the plastics industry and its large-scale use, waste plastic products and plastic waste have brought serious social problems: because waste plastics are discarded in large quantities, are not easy to degrade, are difficult to handle, and have a wide impact, resulting in a huge energy consumption. Waste and pollute the environment, and are called "white pollution" by people

[0008] (3) The research on the reaction mechanism of waste plastic cracking to produce fuel oil is still in the stage of further exploration, there are many influencing factors, and it is difficult to determine the optimal process conditions

[0009] (4) The stability of catalytic diesel oil obtained by cracking waste plastics is poor, and various organic active components contained in it make the color of fuel oil black in a short period of time, the content of colloids increases, and sediments are generated. Affected the storage and use of fuel oil

[0010] At present, there are more than a dozen sets of waste plastic recycling production facilities in China, but due to various reasons, most of them cannot be produced normally. One of the main ones is to improve the yield of oil products and the grade of diesel oil. The key lies in the development of high-performance reforming catalysts.

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