PYROLYSIS DEVICE FOR HIGH MOLECULAR WASTE

MATERIALS

Technical Field

[1] The present invention relates to a pyrolysis device for high molecular waste materials, in which high molecular waste materials such as a vinyl, a rubber, and a synthetic resin, and the like have been pyrolyzed by heat at the low oxygen state, and emulsified gases produced from the pyrolysis process can be collected and recycled. Background Art

[2] In general, the high molecular waste materials such as the synthetic resin, the rubber, the vinyl, and the like have been treated in such a manner that recyclable wastes have been divided separately and used as recycling materials. However, the portion of the recycled wastes is very small, and most of them have been treated by reclamation or incineration to thereby cause wastes of the resource as well as serious atmospheric and environmental contaminations.

[3] In consideration of such problems, in Korean patent Application No. 2004-66703

(Utility Model Registration No. 367210), which has been filed by the same applicant of this patent application, there is proposed a pyrolysis device, in which a compression means and a vacuum device are provided at a screw conveyor so that low oxygen condition can be produced in a pyrolysis chamber by controlling the inflow of the outer air, and also a rotary valve is provided at an inlet and an outlet of the pyrolysis chamber, respectively.

[4] However, such pyrolysis device should be operated for a long time period and a vacuum suction device should be continuously operated during its operation to thereby interrupt the inflow of the air into the inside of the pyrolysis chamber. As a result, there occurs a disorder in a vacuum pump because the vacuum pump should be operated continuously cooperatively during the operation of the pyrolysis device and it cannot endure substantial load applied, so that it is difficult to operate the pyrolysis device for a long time period.

[5] Also, although the rotary valve is respectively provided at the inlet and the outlet of the pyrolysis chamber to control the inflow of the air into the inside thereof, the vinyl is caught by the rotary valves and wound at the time of supplying the vinyl, which is the high molecular waste to thereby make it difficult for the rotary valves be normally operated, so that normal supply of the raw material cannot be accomplished.

[6] Further, there have arisen problems in that the engagement structure of an injection section and a discharge section, and the compression means are constituted complexly

to thereby increase the manufacturing cost. Disclosure of Invention Technical Problem

[7] Accordingly, the present invention has been made to solve the above-mentioned problem occurring in the conventional art, and it is an object of the present invention to provide a pyrolysis device for high molecular wastes, in which normal pyrolysis function can be performed by providing a tightly closed compression chamber to which the wastes or the treated materials are respectively supplied compressively, such wastes or treated materials being transported and supplied to an injection section for transporting and injecting the high molecular waste materials to the pyrolysis chamber and supplied to the discharge section for discharging the treated materials passed through the pyrolysis process to thereby control the inflow of the outer air into the pyrolysis chamber.

[8] Another object of the present invention is to provide a pyrolysis device for high molecular wastes, which can extend the lifespan of an air removing device by continuously maintaining the low oxygen atmosphere when it has been employed once at the initial time of the pyrolysis process in the present invention, in contrast to the conventional process, in which air has been continuously removed by means of the vacuum pump with a separating film installed at the supplied wastes. Technical Solution

[9] To accomplish the above objects, according to the present invention, there is provided a pyrolysis device for high molecular waste materials comprising an injection section for compulsively supplying the waste materials to be treated via an injection pipe by using a transporting screw rotated by driving means, a plurality of pyrolysis chambers arranged in a zigzag fashion to receive the treated materials supplied from the injection pipe for performing the pyrolysis operation with transporting the treated materials by using the transporting screw rotated by the driving means, a heating chamber enclosing the pyrolysis chambers and provided with a burner at the lower portion, a discharge section installed at the back of the pyrolysis chamber for discharging the pyrolyzed materials via a discharge pipe by using the transporting screw rotated by the driving means, and a collector for collecting the emulsified gas produced in the pyrolysis chamber during the pyrolysis process, the pyrolysis device is characterized in that: compression airtight chambers are installed at the injection section and the discharge section for blocking the inflow of an ambient air into the pyrolysis chamber by compressing the treated materials to increase the density of the materials to thereby form a sealing airtight film.

[10] Also, the pyrolysis device of the present invention further comprises a vacuum

pump connected to an outlet of the pyrolysis chamber for maintaining the pyrolysis chamber in the low oxygen state at the initial time of the operation. Advantageous Effects

[11] According to the pyrolysis device for the high molecular waste materials of the present invention, it is possible to accomplish the normal pyrolysis action in the pyrolysis chamber without separate purifying establishments for controlling the inflow of the ambient air as in the conventional art, because the treated materials should be compressed airtight during the transporting procedure to thereby control the inflow of the ambient air.

[12] Further, it is possible to secure stability because the inflow of the ambient air into the pyrolysis chamber can be controlled in spite of the stop of the operation.

[13] Also, according to the present invention, it is possible to reduce the manufacturing cost of the device because the means for controlling the inflow of the ambient air is simple, and it is easy to repair and conserve the device. Brief Description of the Drawings

[14] FIG. 1 is a view showing entire structure of a pyrolysis device for high molecular wastes of the present invention;

[15] FIG. 2 is a view showing an injection section constituting the pyrolysis device of the present invention;

[16] FIG. 3 is an enlarged view showing an inlet tube constituting the pyrolysis device of the present invention;

[17] FIG. 4 is an enlarged view showing the inlet tube constituting the pyrolysis device of the present invention;

[18] FIG. 5 is a view showing the constitution of a discharge section of the pyrolysis device of the present invention. Best Mode for Carrying Out the Invention

[19] Hereinafter, the metal tank with the synthetic resin sheet, and the unit panel of the present invention will be described in detail with reference to the appended drawings.

[20] As shown in FIG. 1, in the pyrolysis device of the present invention, a burner 40 is installed to the lower portion of a heating chamber 20, which is supported by a foundation 90, for supplying heating source to heat inside of the chamber, and a smoke passage 30 is formed at the upper portion of the heating chamber.

[21] The heating chamber 20 is constructed of a pipe shaped multi-stage pyrolysis chamber 10 formed to be communicated with a connection passage 12 in a zigzag type, and in which each of transporting screws 11 is installed in the respective pyrolysis chamber 10 by means of a shaft so that it can be coupled with and rotated by driving means 82 to discharge the emulsified gases produced during the pyrolysis process via

an exhaust pipe 14 provided at one side to make them to be collected in a gas collecting chamber 100.

[22] Also, in the pyrolysis device of the present invention, an injection section 50 is formed at an inlet 58 of the pyrolysis chamber 10 for transporting and injecting the high molecular waste materials into the chamber, and a discharge section 60 is formed at an outlet 15 of the pyrolysis chamber 10 for discharging the treated materials from the pyrolysis process.

[23] As shown in FlGs. 1 and 2, the injection section 50 comprises a compression airtight chamber 55, which is provided with a transporting screw 51 rotated by the driving means 81 in the inside, supported by an axis receiving member 53 at the outside, and connected between the injection pipe 54 connected to the axis receiving member and the inlet 58 of the pyrolysis chamber 10 to thereby transport the treated materials (high molecular waste materials) to the inlet 58 of the pyrolysis chamber 10 at the compressed state by means of the transporting screw 51.

[24] The compression airtight chamber 55 is constructed that it is filled with the treated materials and compressed and closed to have sealing property, so that it can perform the function of controlling the inflow of the ambient air into the pyrolysis chamber.

[25] Also, as shown in FlG. 2, a transporting screw 59 driven by the driving means 83 is shaft-installed at the inlet 58 of a pyrolysis chamber 13 to transport and inject the treated materials supplied via the compression airtight chamber 55.

[26] In the present invention, a vacuum pump 70 is installed at the outlet 15 of the pyrolysis chamber 10 for maintaining the pyrolysis chamber 10 in the low oxygen state till the compression airtight chamber 55 of the discharge section 60 becomes closed as it has not been closed at the initial time of the operation.

[27] As shown in FlGs. 3 and 4, the transporting screw 51 is configured that pitches thereof are gradually decreased in the progressing direction to thereby decrease pitches of the transporting vanes with transporting the treated materials, so that the treated materials can be transported with increased pressure by the reduction of the transporting space.

[28] Also, in the injection section 50 of the pyrolysis chamber, there is provided a plurality of transporting guides 57 having projections formed at predetermined intervals at the inside surface of the injection tube 54 in the longitudinal direction for enhancing the transporting capacity of the vinyl, and the compression airtight chamber 55 is connected to the injection pipe 54 by means of a flange joint to make it easy to conserve and install.

[29] Further, as shown in FlG. 5, the discharge section 60 is provided with compression airtight chambers 63 to control the inflow of the ambient air into the pyrolysis chamber 10 by filling the back side of the discharge pipe 62, one side of which is connected to

the transporting screw 61 rotated by the driving means 84, with the compressed pyrolyzed materials.

[30] The compression airtight chamber 63 is constructed that it is connected to the discharge pipe 62 by means of a flange joint to have a cover 64 hinge-engaged at the end thereof, so that a weight body 65 can be suspended at the cover 64 to apply proper load to it. The driving means 81, 82 and 83 are constructed that power produced from the motor can be transmitted by installing a chain to a sprocket coupled to the transporting screw 11, 51, 57, and 61. Reference numeral 56 represents for a supply inlet for supplying the treated materials transported by the transporting means, and reference numeral 62a represents for a discharge inlet connected to the outlet of the pyrolysis chamber for supplying the discharged treated materials.

[31] Hereinafter, the operation of the pyrolysis device of the present invention constructed as above will be described in detail.

[32] At first, the pyrolysis device for the high molecular waste materials of the present invention will be operated after the compression airtight chamber 63 provided in the discharge pipe 62 of the discharge section 60 has been temporarily isolated from the outside artificially. Then, when the high molecular materials such as rubber, synthetic resin, and the like crushed into proper size, and the wastes such as vinyl and the like are supplied directly into the inlet opening 56 formed at the injection section 50, such high molecular waste materials are transported and crushed again by the transporting screw 51 rotated by the driving means 81 during the compulsive transport, and the pitches of the transporting screw 51 become smaller to thereby make the transporting velocity of the waste materials delayed, so that wastes are gradually collected in the space of the transporting screw 51 and transported to the compression airtight chamber 55.

[33] In the present invention, the vinyl of the wastes is caught by grooves formed between the transporting guide 57 provided at the inside surface of the injection tube 54 during the transport to accomplish the smooth transporting without being wound at the transporting screw 51. Through such procedure, the treated materials are collected and filled in the compression airtight chamber 55 and pushed gradually at the compressed state to be supplied to the pyrolysis chamber 20 via the inlet 58. In this instance, as the compression airtight chamber 55 is filled with treated materials after they are compressed, the inflow of the ambience air into the pyrolysis chamber 10 through the injection tube 54 and the inlet 13 is controlled.

[34] The pressure of the inside of the pyrolysis chamber 10 is reduced by the pump 70 connected to the outlet 15 and is operated, after the blocking of the air inflow via the injection section 50 and the temporary blocking of the discharge section 60, to thereby maintain the low oxygen state, resulting in the state of performing the normal thermal

decomposition.

[35] The treated materials supplied to the multi-staged pyrolysis chamber 10 is compulsively transported by means of the operation of the transporting screw 11 coupled to the driving means and is passed through the pyrolysis chamber 10 in a zigzag fashion via the connection passage 12, and the pyrolysis chamber 10 is heated by the heat supplied to the heating chamber 20 from the burner 40 to thereby perform the thermal decomposition of the transporting wastes in the low oxygen state without burning of the wastes.

[36] The remaining carbides such as ashes, and the like produced in the pyrolysis process is compulsively transported to the compression airtight chamber 63 by means of the transporting screw 61 of the discharge section 60 connected to the outlet 15 and is collected as discharge materials in the chamber and then gradually pushed to the back. In this instance, when the cover 64 mounted at the dismal end of the compression airtight chamber 63 is pressed by the weight body 65, the compression airtight chamber 63 is filled with treated materials and compressed to produce airtight state, so that ambience air is controlled to be prevented from flowing into the pyrolysis chamber 10 via the discharge pipe 62. Therefore, temporary blocking of the pyrolysis chamber is removed from this time, and the pump 70 connected to the outlet 15 is automatically turned off, when negative proper pressure is produced in the pyrolysis chamber 10.

[37] Further, when the compression force of the treated materials supplied into the compression airtight chamber 63 becomes bigger than the weight of the weight body 65, the cover 64 is automatically opened to discharge the compressed materials to the outside. As described above, inflow of the outside air can be controlled as the treated materials have been compressed during the discharge process.

[38] The pyrolysis process of the treated materials transported progressively in the low oxygen state is performed in the pyrolysis chamber 10 by the heating, the emulsified gas produced during this process is flowed into the gas collection chamber 100 via the respective discharge pipes 14 provided at one side end of the respective pyrolysis chambers 10, and the collected gases are transformed into the liquefied fuels, which can be used as fuels, by means of the purifying establishments liquefying them through the separate heat exchange operation.

[39] Meanwhile, although the pressure of the inside of the pyrolysis chamber 10 is reduced by the vacuum pump 70 and maintained in the low oxygen state during the initial time of the process, unstable pyrolysis operation can be produced till the discharge section 60 performs the airtight function without using the vacuum pump 70. As a result, the vacuum pump cannot be applied. Industrial Applicability

[40] As described above, according to the pyrolysis device for the high molecular waste materials of the present invention, it is possible to accomplish the normal pyrolysis action in the pyrolysis chamber without separate purifying establishments for controlling the inflow of the ambient air as in the conventional art, because the treated materials should be compressed airtight during the transporting procedure to thereby control the inflow of the ambient air.

[41] Further, it is possible to secure stability because the inflow of the ambient air into the pyrolysis chamber can be controlled in spite of the stop of the operation.

[42] Also, according to the present invention, it is possible to reduce the manufacturing cost of the device because the means for controlling the inflow of the ambient air is simple, and it is easy to repair and conserve the device.

[43] While the present invention has been described with reference to the preferred embodiments, the present invention is not limited by the embodiments. It is to be understood that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention. However, such variations and modifications are all pertained to the scope of the present invention.