JP2006349224A - Scrap tire recycling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an innovative scrap tire recycling device with favorable profitability since recycling of tires is still not popular, and there seems to be no end to illegal dumping or the like. <P>SOLUTION: To increase the number of scrap tires that can be treated, and to improve profitability, self heating of the scrap tire is carried out from an interior to 250°C by a microwave generated by a microwave generator 6, the scrap tire is inputted in a rotary kiln 10, pyrolysis at 300-450°C is carried out by rotary agitation and heating from a kiln exterior, and it is separated into gas, steel, and char by a screen in the kiln. The gas is sucked and cooled, and used as fuel of a kiln exterior heating burner 28, the steel is recovered after separating it from char again, and the char is recovered as activated carbon by carrying out steam-activation. Everything can be efficiently recovered and recycled by continuous processes, and dioxin generation of combustion gas can be suppressed also. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

In order to recycle waste tires, the present invention can easily control output, instantaneously penetrates the object to be heated, preheats with microwaves that can obtain high thermal efficiency without loss of heating around, and recovers char and oil in a rotary kiln. A device that is effective in the profitability of the method of recovering steel, activated carbon, gas and oil by continuously performing pyrolysis and separation at a good temperature.

Among conventional waste tire recycling methods, microwave heating and activated carbon production and equipment.
JP 2001-89121 A JP 2000-34114 A JP 9-227112 A Japanese Patent Laid-Open No. 2002-130960 JP 2003-75077 A JP-A-5-222377 Many methods and apparatuses such as Japanese Patent Application Laid-Open No. H9-59653 have been presented.

The present invention is not able to efficiently recycle waste tires continuously with the conventional methods and apparatuses as described above, and the profitability has not been solved. The purpose is to provide recycling equipment.

(1)
In order to achieve the above object, the present invention is a method for thermally decomposing, separating and recovering waste tires, and waste tires are difficult to transmit heat only from the outside and are inefficient. In order to improve the efficiency of the microwave by generating heat, the preheating device is made of stainless steel, which is a microwave reflector, and the reflector is made of stainless steel for efficient reflection stirring and the prevention of microwave leakage. 2 at the outlet, 2 at the outlet, and a structure that does not open at the same time and a structure that heats the rotary kiln heating burner combustion gas into the lower tank so that preheating can be performed efficiently. The rotor is preheated by self-heating from the inside of the waste tire with 2.45GHz microwave to a temperature of around 250 ° C so that the thermal decomposition can be efficiently performed in a short time. It features a method of introducing the Kirun.

(2)
This is a method of thermal decomposition and separation of waste tires put into the rotary kiln.To heat the waste tires that generate heat from the outside, the rotary kiln is externally heated with a mixed burner using gas and oil generated by pyrolysis as fuel. A method of performing thermal decomposition at 300 ° C to 450 ° C, the temperature at which char and oil are often recovered, while rotating and stirring inside a hot interior, and continuously separating into steel, char and gas with a spiral mesh It is a feature.

(3)
The recovered gas, steel, and char are collected using a blower to remove the dust, cool it, and separate the oil and water, and reuse the recovered oil as fuel for the kiln-heated mixed burner. Steel is then recovered by compressing it with a roller in order to separate the adhesion of char again, and char is recovered as activated carbon by steam activation using a method of heating while transporting with hot water spraying screw conveyor, and all the waste tire components Efficient profitability can be obtained with a method that efficiently and continuously decomposes, separates and recovers.

(Four)
Exhaust gas discharged from combustion of recovered gas and oil with a mixed burner. Combustion chamber of kiln external heating has a spiral, and the combustion gas travels along the spiral and stays in a state where the outside air is shut off at over 800 ℃ It is characterized by a method that suppresses the generation of dioxins by lengthening the length of water pipes in the chimney and setting the smoke emission temperature to 200 ° C, eliminating waste and exhausting waste tires continuously and efficiently. It can be recycled in an environmentally effective manner.

(Five)
Embodiments of the waste tire recycling apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of Embodiment 1 of the present invention, in which a waste tire 1 is passed through a conveyor body 4 through a stainless steel microwave reflector 2, and the second reflector is closed after the reflector is closed. The heating tank that opens and enters the stainless steel microwave heating tank inside the main body takes the combustion gas from the hot air passage 27 into the lower part and heats it. The microwaves oscillated by the 2.45 GHz microwave oscillator 6 are reflected and stirred in the heating tank to cause the waste tire 1 to self-heat from the inside and raise the temperature to around 250 ° C. The third reflector is opened, the waste tire is moved, the third reflector is closed, the fourth reflector is opened, and the rotary kiln 10 is inserted. Through the above steps, microwave leakage prevention and preheating of waste tires are continuously performed. The waste tire thrown into the rotary kiln 10 rotates while raising the temperature by external heating by the mixed combustion burner 28, and is separated into steel 36 and char 35 in the spiral mesh 15 at 300 to 450 ° C. The separated gas is sucked by the blower 17, dust is removed by the cyclone 18, converted to oil by the gas cooler 19, oil is recovered through the oil / water separator 20, and the gas that has not been converted to oil is used as the fuel for the kiln heating mixed combustion burner 28. And The steel is discharged while being separated from the char by the spiral mesh 15, compressed by the rotating roller 21, separated from the char again and collected. The char separated from the steel is discharged by the spiral 14 and recovered by performing steam activation by heating with a heating burner 34 while transporting hot water with a screw conveyor 23. The recovered gas and oil are combusted in the mixed combustion burner 28, and the combustion gas travels through the combustion chamber 11 along the spiral 12 inside the combustion chamber 11 for a longer residence time and exhausts smoke at 200 ° C in the chimney 16 through the water pipe 37. The product is cooled down to suppress the generation of dioxins and exhausted from the chimney 16. It is a waste tire recycling device that can be continuously and efficiently recycled and has an effect on profitability.

In the waste tire recycling apparatus of the present invention, the combustion treatment method is the mainstream, but it is necessary to switch to recycling in the future.

It is sectional drawing of the best form for implementing this invention. It is a front view of the combustion part for implementing this invention. It is a front view of the kiln discharge port for implementing this invention.

Explanation of symbols

1 ... Waste tire 2 ... Microwave reflector 3 ... Waste tire transport device 4 ... Transport device body
5 ... Conveying roller 6 ... Microwave oscillator 7 ... Waveguide 8 ... Microwave power supply (200V)
9 ... Inspection door 10 ... Rotary kiln body 11 ... Combustion chamber 12 ... Combustion chamber spiral
13 ... Rotary kiln drive gear 14 ... Spiral for char transport
15 ... Steel helix with separation for steel transport and char 16 ... Chimney 17 ... Gas suction blower 18 ... Cyclone 19 ... Gas cooler 20 ... Oil-water separator 21 ... Compression roller
22 ... Drive geared motor 23 ... Screw conveyor 24 ... Drive geared motor
25… Steel tank 26… Rotary kiln drive cyclo reduction motor
27 ... Hot air passage 28 ... Gas oil mixed burner 29 ... Pyrolysis oil piping 30 ... Pyrolysis gas piping
31 ... Side roller 32 ... Kiln receiving roller 33 ... Fireproof insulation
34… Char heating burner
35 ... Char 36 ... Steel 37 ... Water piping

Claims (4)

This is a method of thermal decomposition, separation, and recovery of waste tires. Since waste tires are not efficient because heat is not transmitted only from outside, the efficiency of microwaves is improved by using microwaves to generate heat from the inside. Therefore, the preheating device is made of stainless steel, which is a microwave reflecting material, and reflection stirring is efficiently performed to prevent leakage of microwaves. At the same time, two stainless steel reflectors are installed at the inlet and two at the outlet. A device that has a structure that does not open and a structure that heats the rotary kiln heating burner combustion gas into the lower tank so that preheating can be performed efficiently. Waste tires that are preheated by self-heating from the inside of the waste tires by waves and put into the rotary kiln so that thermal decomposition can be efficiently performed in a short time Cycle device. The waste tires preheated by the above method and put into the rotary kiln are self-heated from the inside, and are heated from outside in the kiln, so a burner that uses gas and oil generated by pyrolysis as fuel and the outside of the rotary kiln Waste tires with a method of separating the steel and char and gas by a spiral mesh at a temperature with good recovery rate of char and oil at around 450 ° C by rotating and stirring while increasing the temperature by heating from Recycling equipment. The gas, steel, and char separated in the rotary kiln by the above method are collected. The gas is sucked with a blower, removed with a cyclone, passed through a cooler, and the oil recovered through the oil-water separator and the gas that has not become oil are collected. The fuel is used as a fuel for the kiln heated co-firing burner, and the steel is recovered through a compression roller for separation from the char again, and the char is recovered as activated carbon by steam activation using a method in which hot water is sprayed and conveyed by a screw conveyor. Method waste tire recycling equipment. Exhaust gas burned with gas and oil recovered by the above method with a co-firing burner goes around the spiral of the kiln external combustion chamber and is cut off from the outside air at 800 ° C or higher, and the residence time is lengthened and water piping is arranged in the chimney to remove the smoke. Recycling device with waste tire pyrolysis gas combustion device with a method of suppressing the generation of dioxins at a temperature of 200 ° C.

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