System for recycling used tires

Abstract

The present invention discloses a system for recycling used tires. The disclosed system for recycling used tires comprises: a pyrolysis furnace that recycles inputted used tires using a carrier gas and decomposes the used tires through direct heating; and an oil collecting unit that collects oil by cooling and condensing hot steam generated by the pyrolysis furnace. The system also includes a carrier gas circulation line and a carrier gas circulation and supply device. The carrier gas circulation line circulates through the pyrolysis furnace and the oil collecting unit. The carrier gas circulation and supply device is connected to the carrier gas circulation line and comprises a sensing element that measures both the temperature inside the pyrolysis furnace and the pressure inside the carrier gas circulation line. In addition, the carrier gas circulation and supply device collects and stores a non-condensable gas generated by the pyrolysis furnace and selectively supplies the non-condensable gas to the pyrolysis furnace.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a system for recycling waste tires enabling to extract various energy sources from the waste tires by pyrolyzing the waste tires through a heating method, and more particularly, to a system for recycling waste tires enabling to achieve economical management and to enhance yield to extract oil by recycling a non-condensed gas produced during the pyrolyzing process as carrier gas.[0003]2. Description of the Related Art[0004]Recently, the demand for tires is rapidly increasing according to the increasing of the demand for vehicles, and therefore the amount of the waste tires is also increased.[0005]As well known, the waste tires are mainly composited high polymer compounds, and their caloric value is about 34 MJ / kg which is higher than 29 MJ / kg of a standard caloric value. Further, the general composition of tires is 43.5wt % of styrene-butadiene copolymer, 32.6wt % of carbon black, 21.7wt ...

AI Technical Summary

Benefits of technology

[0024]According to the system for recycling waste tires of the present invention, the system collects the non-condensed gas produced during the burning of the waste tires entered in the pyrolyzing furnace and uses it as carrier gas, which does not require the conventional apparatus or equipment for providing carrier gas such as carbon dioxide (CO2) or nitrogen (N2), and therefore the initial cost of equipment and cost for managing the system can be saved and finally the economical efficiency can be enhanced.

[0025]Further, oxygen can be burned together with the non-condensed gas through the oxygen removing heater, which can greatly enhance yield to extract oil according to the removal of the oxygen.

Problems solved by technology

The Ministry of Environment prohibits the usage of the waste tires as fuel since they produce various environment pollutions such as sulfur oxides, non-burned hydrocarbon, and sooty smoke when burned.

The waste tires are recycled as footpath blocks, recycled tires, recycled rubber, art fishing banks, and buffers of any structure, but their appliance is limited.

Also, scrapped materials and pollutions are produced when the recycled products are manufactured, and environmental pollution will be caused when they are scrapped.

The direct heating method has a risk for explosion since a flame produced when the waste tires are heated is chemically reacted with the oxygen contained in air in the furnace.

Also, the oil produced by the direct heating method contains moist and glass carbon, which causes the quality of the oil to be worse.

The indirect heating method has no risk for explosion different from the above the direct heating method, but it has lower thermal efficiency and uses most of the oil obtained as a by-product as fuel, which causes the recycling system of the waste tires to be lowered in economy aspect and causes difficulty to treat carbon obtained as a by-product.

Also, since it should be prepared the additional apparatus for timely providing carbon dioxide (CO2) or nitrogen (N2), the initial cost of equipment should be severely heavy and wider space to equip the apparatus should be required.

Images