System and method for preparing oil product through pyrolysis and gasification of plastics

Abstract

The invention relates to a system and a method for preparing an oil product through pyrolysis and gasification of plastics. The system comprises a heatless carrier heat accumulation type rotating bed and a fractionating tower, the heatless carrier heat accumulation type rotating bed comprises a rotating bed pyrolysis furnace, a heat accumulation type gas radiation tube burner, the shell of the rotating bed pyrolysis furnace is provided with a material inlet, a gas and liquid mixture outlet, a material outlet, a combustible gas inlet and a flue gas outlet, the gas and liquid mixture outlet is arranged on the sidewall of the shell, and the bottom furnace of the rotating bed pyrolysis furnace is a rotatable annular furnace bottom; and the heat accumulation type gas radiation tube burner is arranged on the annular furnace wall of the rotating bed pyrolysis furnace, the heat accumulation type gas radiation tube burner comprises an upper heat accumulation type gas radiation tube and a lower heat accumulation type gas radiation tube which are respectively positioned at the upper side and the lower side of the rotatable annular furnace bottom. The heatless carrier heat accumulation type rotating bed adopts radiation tube heating, so air is effectively isolated, generation of dioxins and other harmful gases is reduced, and the stability and the controllability of the oil and gas product are increased.

Description

technical field [0001] The invention mainly relates to the field of plastic resource treatment, in particular to a system and method for preparing oil products through pyrolysis and gasification of plastics. Background technique [0002] At present, the world's energy consumption is mainly based on fossil fuels such as coal, oil and natural gas. The World Energy Organization predicts that from 2005 to 2030, the global primary energy demand will increase by 55%, with an average annual growth rate of 1.8%. Non-renewable fossil fuels are still the main source of primary energy consumption. Accounted for 84%. How to adjust and optimize the energy consumption structure and find alternative energy sources is an important issue facing all countries in the world. [0003] With the development of modern science and technology, especially chemical technology, plastic products have appeared in more and more fields and people's daily life, but followed by tens of millions of tons of p...

AI Technical Summary

Problems solved by technology

[0008] Plastic pyrolysis is an effective way to convert plastics into fuel oil, but it is limited by high energy consumption, difficulty in controlling the pyrolysis process, and the leakage of harmful gases during the pyrolysis process. Complicated, difficult to sell, and low in economy; the oil and gas after plastic pyrolysis needs to be purified and extracted separately, which consumes a lot of energy and complicated equipment and processes

[0009] In addition, the gas produced by the pyrolysis of plastics has a certain calorific value, which is difficult to use

Moreover, the pyrolytic charcoal produced by the pyrolysis of plastics has not found an effective treatment method

[0010] In addition, the existing traditional pyrolysis process has complex equipment design, high operation requirements, and is prone to problems and secondary pollution.

[0011] Therefore, in view of the complex equipment and technology in the plastic pyrolysis process, the poor quality of pyrolysis oil, the complex composition of pyrolysis oil in plastic pyrolysis, the oil and gas after pyrolysis need to be purified and extracted separately, and the pyrolysis gas cannot be used, In order to solve the problems of low heat energy recovery and unusable pyrolytic carbon, it is necessary to provide a clean, efficient and energy-saving plastic pyrolysis method

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