KR20130067085A - Hot decomposition system of waste plastic materials - Google Patents

Abstract

The present invention relates to a waste synthetic resin pyrolysis device in which heat medium oil is filled in a vacuum condition, and a heat source is supplied to heat medium oil to improve a heat transfer area and heat efficiency by heating a cylinder and a screw. A hollow cylinder provided with an inlet portion to be melted and a discharge portion for discharging the waste synthetic resin paste which has been thermally decomposed, and a heat insulating case formed outside the cylinder to form a sealed accommodation space with the outer wall of the cylinder; Heat medium oil filled in the space, heating means mounted in the receiving space to heat the heat medium oil, and a plurality of heat exchangers are mounted to engage with each other in the cylinder, and transfer the waste synthetic resin to the discharge part while stirring the introduced waste synthetic resin. Is connected to the axis of rotation of the screw to rotate the at least one screw It is configured to include a light bulb East.

Description

Hot decomposition system of waste plastic materials

The present invention relates to a waste synthetic resin pyrolysis device, and more particularly, waste synthetic resin which is filled with thermal oil under vacuum conditions, and supplies heat source to the thermal oil to heat the cylinder and the screw, thereby increasing the heat transfer area and improving the thermal efficiency. It relates to a pyrolysis device.

In general, the waste synthetic resin melting apparatus applied to the waste synthetic resin fueling system as described above is installed with an extrusion screw inside a cylindrical cylinder having a heater heating means, and the synthetic resin support material is melt-transferred through the raw material supply to be discharged through the outlet. You lose.

According to the Republic of Korea Utility Model Registration No. 20-0248463 registered on September 17, 2001, the main body is provided with an injection hole at one end and an extrusion head at the other end, and the main body so as to melt the plastic raw material injected into the main body And a heater provided in the main body, a screw for pressurizing and transporting the plastic raw material so that the plastic raw material installed and introduced into the main body is extruded through the extrusion head, and a motor driving the screw, wherein the rotating shaft of the screw is tapered. It has a true shape, and a small diameter portion having a relatively small diameter is formed at one end thereof, and a large diameter portion having a relatively large diameter is formed at the other end thereof, and the small diameter portion of the screw is disposed so as to be located under the inlet. In the melt extruder for producing a molding tape, the extrusion head is the bottom of one end of the main body or Is provided on one side, the motor has been presented a melt extruder connected to the large diameter portion of the screw.

However, since the conventional apparatus as described above is difficult to control the temperature, the waste synthetic resin to be melted is heated to an excessively high temperature, or excessively thermally decomposed as it is left for a long time in a high temperature condition, thereby degrading its value as a renewable fuel.

In addition, the heating area is limited according to the direct heating method, and in part, it is difficult to secure the value as a regenerated fuel because of uniform temperature control, and waste gas is generated a lot due to the excessive heating, which makes the working environment worse. In addition, it acts as a major culprit of air pollution, and has a problem in that energy efficiency decreases because heat loss occurs due to difficulty in thermal insulation.

The present invention for solving the conventional problems as described above is to circulate the heated heat medium oil in a vacuum state, it is possible to maximize the life of the device by minimizing corrosion due to oxidation of the device of the metal, the combustion efficiency is significantly increased It has the effect of saving energy, and as the heating area is significantly increased compared to the existing heater method, it is possible to pyrolyze at low temperature to prevent excessive pyrolysis and to provide waste synthetic resin pyrolysis device that can secure value as a renewable fuel. There is a purpose.

In order to achieve the above object, the present invention provides a waste synthetic resin pyrolysis apparatus for receiving and melting waste synthetic resin pulverized by filtering impurities and discharging them for molding. A hollow cylinder provided with a discharge part for discharging the waste synthetic resin paste which has been thermally decomposed, a heat insulating case formed outside the cylinder to form a sealed accommodation space with the outer wall of the cylinder, and a heat medium oil filled in the accommodation space; And heating means mounted to the accommodation space to heat the heat medium oil, a plurality of heating means mounted to engage with each other inside the cylinder, and transferring the waste synthetic resin to the discharge part while stirring the introduced waste synthetic resin, and the at least one screw. Closed composite including a rotary drive unit connected to the rotating shaft of the screw to rotate It provides support pyrolysis unit.

According to another aspect of the present invention, the at least one screw forms a receiving space inside the rotating shaft, the receiving space is filled with heat medium oil, heating means for heating the heat medium oil is disposed.

According to another aspect of the present invention, the receiving space is in a vacuum state, and the heat medium oil is filled in the receiving space while maintaining the vacuum state.

According to another aspect of the present invention, the heating means is connected via an idle connection including a snap ring so that the wires for supplying power to the heating means are not interfered while the screw is rotating.

According to another aspect of the present invention, a heating member is interposed between the heating means and the wire so that heat of the heating means is not transferred to the wire.

According to another aspect of the present invention, the insulating case is formed in plurality to form a separate receiving space for each section of the cylinder, each receiving space is filled with heat medium oil, heating means for heating the heat medium oil to a different temperature It is attached to each insulation case.

According to another aspect of the present invention, a pulley which is connected to the rotary driving unit and the belt rotates, a reducer connected to the central axis of the pulley to adjust the rotational speed and output, bearing mounted between the reduction shaft and the rotating shaft of the screw The power transmission unit further comprises a box.

According to the present invention as described above, there is an effect to thermally decompose the waste synthetic resin to be produced as a solid fuel by recycling the combustible waste containing various plastics.

In addition, unlike the conventional method of heating using a heater, since the heat medium oil is heated in a vacuum state, it is possible to maximize the life of the device by minimizing corrosion due to the oxidation of the metal device, and the combustion efficiency is significantly increased. It has the effect of saving energy. In addition, there is an effect that the melting process can be made more quickly and efficiently by heating the waste synthetic resin introduced by circulating the heat medium oil in the screw as well as the cylinder.

In addition, as the heating area is significantly increased compared to the conventional heater method, low-temperature pyrolysis can be prevented, and excessive thermal decomposition can be prevented, as well as the value of renewable fuel, and the amount of waste gas can be reduced.

1 is a conceptual diagram of a waste synthetic resin pyrolysis apparatus according to the present invention,
Figure 2 is a cross-sectional view of the waste synthetic resin pyrolysis apparatus according to the present invention,
Figure 3 is an enlarged longitudinal cross-sectional view of the waste synthetic resin pyrolysis apparatus according to the present invention,
4 is a partially enlarged longitudinal sectional view of the screw shown in FIG. 3;
5 is a conceptual diagram of a waste synthetic resin pyrolysis apparatus according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration and operation of the waste synthetic resin pyrolysis apparatus according to the present invention.

1 is a conceptual diagram of a waste synthetic resin pyrolysis apparatus according to the present invention, Figure 2 is a cross-sectional view of the waste synthetic resin pyrolysis apparatus according to the present invention, Figure 3 is a partially enlarged longitudinal section of the waste synthetic resin pyrolysis apparatus according to the present invention, Figure 4 is 3 is an enlarged vertical cross-sectional view of the screw shown in Figure 3, Figure 5 is a conceptual diagram of a waste synthetic resin pyrolysis apparatus according to another embodiment of the present invention.

The present invention as shown above relates to a waste synthetic resin pyrolysis apparatus for receiving and melting waste synthetic resin pulverized by filtering impurities and discharged for molding, the inlet 111 to which the waste synthetic resin pulverized flows, and melted While forming a hollow cylinder 110 having a discharge part 112 for discharging the waste synthetic resin paste, which has been thermally decomposed, and an outer wall of the cylinder 110 and a sealed receiving space. The insulating case 120, the heat medium oil 140 filled in the receiving space, the heating means 150 mounted in the receiving space to heat the heat medium oil 140, and the inside of the cylinder 110 A plurality of screws (160, 170) to be transferred to the discharge part (112) while stirring the introduced waste synthetic resin and the at least one screw (160) to rotate And a rotary drive unit that is connected to the shaft 161.

In general, the waste synthetic resin solid fuel production system is a shredding device for shredding the collected waste synthetic resin, and the sorting device for filtering the waste synthetic resin shredded in the shredding device by using wind or magnetic force to filter out impurities and separate only the pure waste synthetic resin And a pyrolysis device for receiving and melting the pure waste synthetic resin pulverized product separated by the sorting device, and a molding device for molding the paste melted in the pyrolysis device into pellets.

The waste synthetic resin supplied to the inlet 111 is introduced into the cylinder 110. In addition, the cylinder 110 is melted while being stirred while passing between the screws 160 and 170 which rotate and engage with each other. The molten waste synthetic resin is deformed into a paste, and the paste is discharged to the discharge part 112 provided on one side of the cylinder 110. The discharge part 112 may be integrally formed with the cylinder 110 and may have a structure coupled to be detachable. In addition, it may take the form of a funnel inclined downward to facilitate the discharge of the paste-type waste synthetic resin, it is finally discharged to the discharge port 113 connected to the outside.

At least one screw 160 of the screws 160 and 170 is connected to various rotational drive units including a motor on one side and rotates. Another screw 170 is arranged to engage with the screw 160 is rotated while being engaged with each other by the rotational force of the screw 160. Accordingly, the waste synthetic resin pulverized material is sucked between the screws 160 and 170.

At this time, the heat medium oil 140 is filled in the receiving space provided between the outer wall of the cylinder 110 and the insulating case 120, and the heat medium oil 140 at a predetermined temperature by the action of the heating means 150. Since the internal temperature of the cylinder 110 may be maintained at a high temperature because it is in a heated state, the waste synthetic resin pulverized material passing through the cylinder 110 may be melted into a paste and exit between the screws 160 and 170. The insulating case 120 may be made of a variety of well-known thermal insulation, easy to heat insulation, including a heat insulating material coated with a reflective film so that the thermal energy of the heat medium oil 140 does not escape to the outside.

The heating means 150 may occur in various embodiments in a range capable of heating the heat medium oil (140). For example, the heating means 150 may be provided as a heating means including a heating wire 151 for generating thermal energy through an external power source, and the cylinder (such that the heating wire 151 is exposed to the heat medium oil 140). The heat medium oil 140 may be heated by being disposed between the outer wall of the 110 and the insulating case 120.

According to another aspect of the present invention, the at least one screw 170 forms a receiving space inside the rotating shaft 171, the receiving space is filled with the heat medium oil 173, heating the heat medium oil 173 Heating means 174 is disposed.

Since the heat medium oil 173 is filled in the accommodating space of the passage form evenly provided in every corner of the rotating shaft 171 of the screw 170, the screw 170 is heated evenly, and consequently between the screws 160 and 170. The waste synthetic resin pulverization exiting the melt is melted and discharged as a paste. As described above, when the heat medium oil 173 inside the screw 170 is heated, temperature control is easy, and the screw 170 may be uniformly heated as a whole, and only the rotating shaft 171 needs to be heated to increase thermal efficiency. It can be effected.

At this time, the heating means 174 may occur in various embodiments in the range capable of heating the heat medium oil (173). For example, the heating means 173 may be a heat transfer means including a heating wire for generating thermal energy through an external power source, and the heating wire is disposed inside the rotating shaft 171 to be exposed to the heating medium oil 173. (173) can be directly heated.

According to another aspect of the present invention, the receiving space is in a vacuum state, and the heat medium oils 140 and 173 are filled in the receiving space while maintaining the vacuum state.

That is to say, the receiving space formed between the outer wall of the cylinder 110 and the insulating case 120 and the receiving space formed inside the rotating shaft 171 are made into a vacuum state before filling the heat medium oils 140 and 173, and therein air, in particular It removes oxygen and puts it in a vacuum. When the heat medium oil (140, 173) is filled in each receiving space in a vacuum state, the heat medium oil (140, 173) is not deteriorated by contact with air, and heat medium oil can remain in its original state for a long time as compared with the case where it is not. In addition, the heating performance of the heat medium oil is improved because impurities are not included, and the corrosion rate due to oxidation of the cylinder 110, the insulating case 120, and the rotation shaft 171 may be prevented.

According to another aspect of the present invention, the heating means 174 includes a snap ring 221 so that the electric wire 210 for supplying power to the heating means 174 is not interfered while the screw 170 rotates. Is connected through the idle connection 220. The idle connection portion 220 is made of a material that can be energized, and even if the screw 170 rotates, the wire 210 may take a structure such as a bearing that is easy to idle so as not to rotate. Therefore, when the screw 170 rotates, the wire 210 is not twisted and the rotational motion of the screw 170 is not interfered by the wire 210.

According to another aspect of the present invention, the heating member 222 between the heating means 174 and the wire 210 is not heat transfer to block the heat of the heating means 174 from being transmitted to the wire 210 is not made May be interposed.

According to another aspect of the present invention, the insulating case 120 is formed in a number to form a separate receiving space for each section of the cylinder 110, each receiving space is filled with a heat medium oil 140, the heat medium Heating means 150 for heating the oil 140 to a different temperature is mounted on each thermal insulation case 120.

As described above, a plurality of sealed receiving spaces are formed successively along the longitudinal direction of the cylinder 110 between the insulating case 120 and the outer wall of the cylinder 110, and each receiving space is vacuumed, and then each When the heat medium oil (141, 142, 143, 144) is filled in the receiving space, and the respective heat medium oils (141, 142, 143, 144) are heated to different temperatures through heating means (150) mounted for each section, the internal temperature of the cylinder (110) is sectioned. Not much can be controlled. Therefore, the energy due to efficient temperature control is achieved by heating at a relatively high temperature in the inlet portion 111 section into which the waste synthetic resin is introduced, and by heating at a relatively low temperature in the ejection section 112 section through which the molten paste-type waste synthetic resin is discharged. Saving effect and high temperature heating and excessive heating is prevented, so that the pyrolysis process of the waste synthetic resin can be carried out more stably.

According to another aspect of the present invention, the pulley 191 is connected to the rotary drive unit and the belt (B) to rotate, the reducer 192 is connected to the central axis of the pulley 191 to adjust the rotational speed and output; The power transmission unit 190 further includes a bearing box 193 mounted between the reduction gear 192 and the rotation shaft 161 of the screw 160. The power generating unit may be applied to various means under the condition of rotating the screw 160, but may be provided in particular as a motor. The pulley 191 receives and rotates the rotational force of the motor, and the reducer 192 serves to transmit the screw 160 by adjusting the rotational ratio of the motor.

According to the present invention as described above, there is an effect to thermally decompose the waste synthetic resin to be produced as a solid fuel by recycling the combustible waste containing various plastics. In addition, unlike the conventional method of heating using a heater, since the heat medium oil is heated in a vacuum state, it is possible to maximize the life of the device by minimizing corrosion due to the oxidation of the metal device, and the combustion efficiency is significantly increased. It has the effect of saving energy. In addition, there is an effect that the melting process can be made more quickly and efficiently by heating the waste synthetic resin introduced by circulating the heat medium oil in the screw as well as the cylinder. In addition, as the heating area is significantly increased compared to the conventional heater method, low-temperature pyrolysis can be prevented, and excessive thermal decomposition can be prevented, as well as the value of renewable fuel, and the amount of waste gas can be reduced.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Could be. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

110: cylinder
111: inlet
112: discharge part
120: thermal insulation case
140: heat medium oil
150: heating means
160,170: Screw
161, 171: rotation axis
173: heat medium oil
190: power transmission unit
191: pulley
192: reducer
193: Bearing box
210: wires
220: idle connection
221: snap ring
222: insulation member

Claims (7)

In the waste synthetic resin pyrolysis apparatus which receives the waste synthetic resin crushed product which has filtered out impurities and melts it to be discharged for molding,
A hollow cylinder provided with an inlet part into which the waste synthetic resin pulverized material is introduced, and a discharge part from which the waste synthetic resin paste, which has been melted and finished pyrolysis, is discharged;
An insulating case formed outside the cylinder to form a sealed accommodation space with the outer wall of the cylinder;
Heat medium oil filled in the receiving space;
Heating means mounted to the accommodation space to heat the heat medium oil;
A plurality of screws mounted inside the cylinder to be engaged with each other, and transferring the introduced waste synthetic resin to the discharge part while stirring;
And a rotary drive unit connected to a rotating shaft of the screw so as to rotate the at least one screw. The method of claim 1,
The at least one screw forms a receiving space in the rotating shaft, the receiving space is filled with heat medium oil, heating means for heating the heat medium oil, characterized in that the synthetic resin pyrolysis device is disposed. 3. The method according to claim 1 or 2,
The accommodating space is a vacuum state, and the thermal oil is a waste synthetic resin pyrolysis device, characterized in that filled in the accommodating space while maintaining a vacuum state. The method of claim 2,
The heating means is a waste synthetic resin pyrolysis device, characterized in that connected through the idle connection including a snap ring so that the electric wire for supplying power to the heating means in the process of rotating the screw. 5. The method of claim 4,
And a heat cutting member is interposed between the heating means and the wire so that heat of the heating means is not transferred to the wire. The method of claim 1,
The insulation case is formed in a number to form a separate receiving space for each section of the cylinder, each of the receiving space is filled with heat medium oil, heating means for heating the heat medium oil to a different temperature is mounted on each heat insulation case Waste synthetic resin pyrolysis device characterized in that. The method of claim 1,
A power transmission unit comprising a pulley connected to the rotary driving unit and a belt to rotate, a reducer connected to the central axis of the pulley to control a rotation speed, and a bearing box mounted between the reducer and the rotating shaft of the screw; Waste synthetic resin pyrolysis device further comprising.

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