THERMAL PYROLYSIS APPARATUS

Abstract

A thermal pyrolysis apparatus includes at least one pyrolysis device. The pyrolysis device includes an inlet, an outlet and a pyrolysis chamber. A conveying unit is provided in the pyrolysis chamber. The pyrolysis device has a casing with thermal oil circulated in the casing. An oil gas collecting unit is disposed on top of the casing and interconnected with the pyrolysis chamber. The pyrolysis chamber of the present invention provides a better closed effect, which can be heated evenly and won't be oxidized easily. The present invention can be applied to recycle waste rubbers or waste tires.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a thermal pyrolysis apparatus, and more particularly to one having a pyrolysis device to decompose waste rubbers or waste tires efficiently to produce carbon power and gas after pyrolysis.

2. Description of the Prior Art

Because industry and commerce are greatly developed, vehicles are very important for people. After a period of time, the tires of vehicles will harden and the grooves on the tires will suffer a lot of wear and tear, which may influence the function of the tires. Therefore, the tires have to be discarded after being used for a period of time. More and more waste tires are discarded without concern, which may occupy a lot of space. Furthermore, the waste tires are not easy to be decomposed. Sometimes, the tires may bring poisonous substances if they were burned carelessly.

As known in the prior art, the waste tires can be recycled for processing and pyrolysis. In fact, the waste tires have a certain economical value, such as oil, carbon black, gas, and steel wires.

To deal with the pyrolysis of the waste tires is in the condition of no oxygen or less oxygen. By using thermal energy to decompose the waste tires, the diesel oil, residual oil, carbon black, other gas and residue of the waste tires can be separated out. The waste tires must be cut into pieces and conveyed to a pyrolysis chamber for proceeding pyrolysis in order to produce carbon black, residual oil and the like.

A conventional pyrolysis apparatus cannot be heated evenly. Some areas are heated over and others are heated insufficiently, which may cause that some waste tire pieces become hardened and some waste tire pieces cannot be decomposed.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a thermal pyrolysis apparatus in a closed configuration, which can be heated evenly and won't be oxidized easily for the material to be decomposed.

According to the present invention, there is provided a thermal pyrolysis apparatus comprising a feed device, a conveying device, at least one pyrolysis device, and a discharge device.

Preferably, the pyrolysis device includes an inlet, an outlet and a pyrolysis chamber. A conveying unit is provided in the pyrolysis chamber. The pyrolysis device has a casing with thermal oil circulated in the casing. An oil gas collecting unit is disposed on top of the casing and interconnected with the pyrolysis chamber.

Preferably, the conveying unit in the pyrolysis chamber is a spiral rod which is transversely disposed in the pyrolysis chamber to stir and convey waste tire fragments from on end to an opposite end of the pyrolysis chamber in a spiral manner. The waste tire fragments can be repeatedly stirred and heated evenly, providing a better pyrolysis effect.

Preferably, the gas collected by the oil gas collecting unit can be reused after the waste tire fragments are decomposed sufficiently, so that the waste tires can be recycled.

Preferably, the pyrolysis chamber is surrounded by the casing and the casing has thermal oil circulated therein. Compared to the prior art, the present invention can be heated evenly to provide a better pyrolysis effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a preferred embodiment of the present invention; and

FIG. 2 is a schematic view of the preferred embodiment of the present invention when in use.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

As shown in FIG. 1, a thermal pyrolysis apparatus according to a preferred embodiment of the present invention comprises a feed device 1, a conveying device 2, a first pyrolysis device 3, a second pyrolysis device 4, and a discharge device 5.

The feed device 1 comprises an inlet 11, a conveying member 12 and a motor 13. Waste tire fragments can be conveyed from the inlet 11 to an outlet 14 through the conveying member 12.

The conveying device 2 comprises an inlet 21, a conveying member 22 and a motor 23. The inlet 21 is located under the outlet 14. The conveying member 22 is located under the inlet 21 to convey the waste tire fragments to an outlet 24 which is located at a rear end of the conveying device 2.

The first pyrolysis device 3 has a first inlet 31 which is connected with the outlet 24. The first pyrolysis device 3 comprises a first casing 33. The first casing 33 has a first thermal oil input end 331 and a first thermal oil output end 332, such that the thermal oil can be circulated in the first casing 33. The first casing 33 has a first pyrolysis chamber 34 therein. The first pyrolysis chamber 34 is transversely disposed in the first casing 33. A first conveying unit 35 is provided in the first pyrolysis chamber 34. The first conveying unit 35 is a spiral rod which is transversely disposed in the first pyrolysis chamber 34 and connected with a motor 37 to stir and convey the waste tire fragments from the first inlet 31 to an opposite end. A first oil gas collecting unit 36 is provided on top of the first casing 33 and interconnected with the first pyrolysis chamber 34 so as to collect the oil gas in the first pyrolysis chamber 34. The first oil gas collecting unit 36 has a first air vent 361. The first casing 33 has a first outlet 32 which is disposed at a bottom of the first casing 33 opposite to the first inlet 31.

The second pyrolysis device 4 is connected with a rear end of the first pyrolysis device 3 and located under the pyrolysis device 3. The second pyrolysis device 4 has a second inlet 41 which is connected to the first outlet 32 and located under the first outlet 32, so that the material discharged from the first outlet 32 can direct enter the second pyrolysis device 4 through the second inlet 41. The structure of the second pyrolysis device 4 is substantially identical to that of the first pyrolysis device 3. The second pyrolysis device 4 comprises a second casing 43. The second casing 43 has a second thermal oil input end 431 and a second thermal oil output end 432, such that the thermal oil can be circulated in the second casing 43. The second casing 43 has a second pyrolysis chamber 44 therein. The second pyrolysis chamber 44 is transversely disposed in the second casing 43. A second conveying unit 45 is provided in the second pyrolysis chamber 44. The second conveying unit 45 is a spiral rod which is transversely disposed in the second pyrolysis chamber 44 and connected with a motor 47 to stir and convey the waste tire fragments from the second inlet 41 to an opposite end. A second oil gas collecting unit 46 is provided on top of the second casing 43 and interconnected with the second pyrolysis chamber 44 so as to collect the oil gas in the second pyrolysis chamber 44. The second oil gas collecting unit 46 has a second air vent 461. The second casing 43 has a second outlet 42 which is disposed at a bottom of the second casing 43 opposite to the second inlet 41.

The discharge device 5 comprises a terminal funnel 51, a terminal conveying member 52 under the funnel 51 and a motor 53 to send out the material.

As shown in FIG. 2, the waste tire fragments with catalyst are placed into the feed device 1 to be delivered to the first pyrolysis device 3 through the conveying device 2. Because the thermal oil is circulated in the first casing 33, the temperate in the first pyrolysis chamber 34 can be risen to about 500 degrees centigrade. Because the first pyrolysis chamber 34 is in a closed status, the waste tire fragments are stirred and conveyed by the first conveying unit 35 which is transversely disposed in the first pyrolysis chamber 34. The waste tire fragments can be thermal decomposed in the condition of no oxygen to collect the oil gas form the waste tire fragments through the first oil gas collecting device 36. The remnant carbon black materials are sent to the second pyrolysis device 4 from the first outlet 32 for the second pyrolysis. The oil gas decomposed by the second pyrolysis is collected through the second oil gas collecting device 46 and then to be sent out. The last remnant is carbon powder which is sent out through the second outlet 42 and the discharge device 5 and can be used for other purposes.

The present invention uses two series pyrolysis devices to provide a perfect pyrolysis effect and conform to the demand of carbon black.

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.

Claims

1. A thermal pyrolysis apparatus, comprising at least one pyrolysis device, the pyrolysis device comprising:

a casing, the casing having a thermal oil input end and a thermal oil output end for thermal oil to be circulated in the casing;

a pyrolysis chamber, the pyrolysis chamber being transversely disposed in the casing;

a conveying unit, the conveying unit being a spiral rod which is transversely disposed in the pyrolysis chamber;

an oil gas collecting unit, the oil gas collecting unit being disposed on top of the casing and interconnected with the pyrolysis chamber, the oil gas collecting unit having an air vent; and

an inlet and an outlet, the inlet and the outlet being disposed at two ends of the pyrolysis chamber, respectively.

2. The thermal pyrolysis apparatus as claimed in claim 1, wherein a conveying device is provided at a front end of the inlet of the pyrolysis device, the conveying device comprising an inlet, a conveying member under the inlet, a motor and an outlet which is connected with the inlet of the pyrolysis device.

3. The thermal pyrolysis apparatus as claimed in claim 2, wherein a feed device is provided at a front end of the inlet of the conveying device, the feed device comprising a conveying member, an inlet and an outlet being disposed at two ends of the conveying member of the feed device respectively, the outlet of the feed device being located above the inlet of the conveying device.

4. The thermal pyrolysis apparatus as claimed in claim 1, wherein the outlet of the pyrolysis device is connected with a discharge device, the discharge device comprising a terminal funnel which is connected with the outlet of the pyrolysis device and a terminal conveying member which is located under the terminal funnel.

5. The thermal pyrolysis apparatus as claimed in claim 1, comprising two or more than two pyrolysis devices which are connected one by one, wherein the outlet of a front pyrolysis device is connected to the inlet of a rear pyrolysis device.