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Pyrolysis for the treatment of plastic waste and end-of-life tires(ELT)
Pyrolysis for the treatment of plastic waste and end-of-life tires(ELT)
The pyrolysis process allows the disposal of high energy recovery waste, without solid and gaseous pollution. Today the "pyrolysis" of waste is a healthy alternative to the use of traditional incinerators, however, very expensive and with heavy maintenance while the evolution for waste disposal goes through the use of pyrolytic ovens, which are much more efficient and with very low maintenance equipment.
A pyrolysis plant eliminates waste through the so-called pyrolysis, a process of thermochemical decomposition of organic materials, obtained by applying heat in a reducing environment (complete absence of an oxidizing agent such as oxygen). The heat supplied in the pyrolysis process separates the chemical bonds originating from the material, forming simpler molecules.
Using temperatures between 400 and 500 ° C, the pyrolyzation of waste converts the material from the solid state to liquid products (pyrolysis oil) and gas (syngas), which can be used as fuels or secondary raw materials for subsequent chemical processes.
The solid carbonaceous residue (carbon black) obtained can be further refined by providing products, such as activated carbon. The pyrolysis gas (syngas) is produced in a controlled mode in the pyrolysis reactor, minimizing the risks of pollution and optimizing the total extraction of the produced gas.
The pyrolytic plant does not produce processing residues and does not pollute: all the incoming material is disposed of, even the same scraps, largely composed of unused carbon dioxide, are vitrified.
The reduction of polluting substances is not obtained by adding more or less complex filters or devices but simply by eliminating the pollution at the source. There are no ashes, nano-particles, unburnt fumes, dioxins, furans or anything else that are released into the atmosphere at the end of the transformation cycle.
Pyrolysis is an energy cycle capable of disposing of the waste produced directly on site without having to depend on landfills sites. The result is energy in a much less polluting form, compared to that produced by fossil fuels.
The gas (syngas) resulting from pyrolysis is generally used for the subsequent heating of the furnace. Electricity produced can be used to restore the existing network or to create new distribution lines, where it is missing.
Continuous pyrolysis for plastic and ELT waste disposal
The continuous pyrolysis process allows the disposal of waste with high energy recovery, without solid and gaseous pollution.
-Does not produce dioxins, PM 10, polycyclic aromatic hydrocarbons, furans and benzofurans;
-It has an insignificant environmental impact;
-It is not a combustion or incineration plant but a hydrogen transformation plant;
carbon monoxide and light hydrocarbons;
-It has no reflux.
Continuous Pyrolysis Plant of Rep Italia s.r.l. from October 2020
The system is modular, can be duplicated, tripled or more according to the customer’s needs.
It consists of a pyrolytic furnace made of stainless steel with continuous feeding is able to dispose of about 1,000 kg./hour (25 tons. day) of plastic waste, and with special measures also ELT (end of life tires).
It is in gado to work 24/24, and 365/365 to get the following under products:
a)- fuel oil,
b)- syngas
(both reused to power the plant and make it energy self-sufficient).
c)- minimum carbon residue and ash
No less important was the care of the reduction of possible emissions to fall well within the parameters required by the relevant legislation, then a new generation green plant.
The part of fuel oil exceeding the internal requirements, is transferred to special tanks and can be reused for multiple applications such as:
a)- producing electricity, (non-polluting)
b)- produce heat or steam, (non-polluting)
c)- be placed in a terminal distiller where noble materials such as "virgin naphtha, or ethylene, paraffin or methane or hydrogen" are recovered.
d)- Recover CO2 for industrial or hydroponic agricultural greenhouses.
Now this system is ready to be marketed because it has undergone a severe series of tests and practical tests to make it very reliable and, no less important, with a very reduced maintenance over time.
The system allows to work at ideal and constant temperatures so that the injected polymer can develop all its energy content and thus optimize the yields.
The basic plant realized is able to dispose of 1 ton of polymer waste every hour and can work with reduced workforce 24/24, 365/365 but it is possible to stop it at any time and the restart requires only a few minutes of heating.
Does not produce DIOXINS, PM 10, polycyclic aromatic hydrocarbons, furans, and benzofurans;
It has an irrelevant environmental impact;
It is not a combustion or incineration plant, but a transformation into hydrogen, carbon monoxide, and light hydrocarbons;
It has no waste.
The plastic and pneumatic disposal plants designed by REP Italia srl, use pyrolysis to transform and not to destroy the materials conferred, obtaining by-products such as diesel fuel and carbon black and eventually producing electricity, helping the planet to be free from plastic.
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