KR20220162104A - Waste plastic emulsification system with improved heating and reduction efficiency - Google Patents

Abstract

Disclosed is a plastic waste emulsification system having improved heating and reduction efficiency. Disclosed is a plastic waste emulsification system having improved heating and reduction efficiency. The plastic waste emulsification system having improved heating and reduction efficiency according to one embodiment of the present invention comprises: a heating unit including at least one transfer path where raw materials including plastic waste are transferred and heating the raw materials; a control system controlling heating of the heating unit; and a condensation unit condensing gas generated from the raw materials heated by the heating unit to generate primary oil, wherein the heating unit includes: a softening unit having at least a partial area heated in a first heating mode to soften the introduced raw materials in a solid state; and an evaporation unit having at least a partial area heated in a second heating mode to evaporate the softened raw material transferred from the softening unit to generate the gas. The first heating mode consists of a high frequency-induced heating mode and can enable relatively rapid heating, compared to the second heating mode.

Description

Waste plastic emulsification system with improved heating and reduction efficiency}

The present invention relates to a waste plastic emulsification system with improved heating and reduction efficiency, and more particularly, in a waste plastic emulsification system that produces oil by heating and heat-treating a raw material containing waste plastic, inducing high frequency for heating the raw material. By using the heating method together with the microwave heating method using the microwave sensitive heating device that generates heat in response to the microwave, the raw material in the solid state is softened relatively quickly through the high frequency induction heating method, and in the subsequent melting/melting process It relates to a technical idea that can improve the efficiency of a waste plastic emulsification system by reducing power consumption through a microwave heating method.

Technical ideas for recycling and using waste plastics or generating renewable energy from waste plastics are being actively studied.

In general, a conventional waste plastic emulsification system for chemically recycling waste plastic by pyrolysis is composed of a heating furnace and a gas classification tank for crushing solid waste plastic through a crusher and applying heat to the pulverized waste plastic A method of pyrolysis after melting is used.

In this way, when waste plastic is pyrolyzed, oil can be produced from waste plastic by heating raw materials (that is, waste plastic) to vaporize them into various organic gases (gases), and then condensing and softening the gases by type.

At this time, in the heating furnace in which the raw material is heated, a heating material that converts electric energy into thermal energy, in particular, induction heating using an electric coil is commonly used, and the raw material is melted or melted by heating the heating furnace. .

However, in the case of using an electric coil as described above, although relatively fast heating is possible, there is a problem in that electricity consumption is large and cost consumption accordingly increases. Accordingly, burden may increase to use induction heating in all processes.

Meanwhile, recently, microwave-sensitive heating devices capable of generating heat in response to microwaves have been known. These microwave sensitive heating devices can be molded into various shapes, have excellent thermal shock resistance and calorific value, and have relatively very low power consumption compared to conventional electric coils, etc., and their usage is gradually increasing.

However, since the microwave heating method using such a microwave sensitive heating device has a slower heating rate than the above-mentioned induction heating, it takes a lot of time to soften the raw material in the solid state in the initial process to enable melting/melting. There are issues that can slow you down.

Therefore, although the power consumption is relatively high, a technical idea that can greatly improve the efficiency of the waste plastic emulsification system is required by appropriately using the high-frequency induction heating method, which can heat relatively quickly, and the microwave heating method, which consumes relatively little power. .

Korean registered patent (Registration No. 10-1026202, "Pyrolysis and emulsification device for waste plastic")

Therefore, the technical problem to be achieved by the present invention is to improve the efficiency of the waste plastic emulsification system by appropriately using a high-frequency induction heating method capable of relatively rapid heating, although power consumption is relatively high, and a microwave heating method with relatively low power consumption. It is to provide technical ideas that can be greatly improved.

In addition, it is to provide a technical idea for forming an inclined structure of a conveying path to prevent carbonization of raw materials in the conveying path and to increase melting/melting efficiency.

Waste plastic emulsification system with improved heating and reduction efficiency according to an embodiment of the present invention for achieving the above technical problem is an emulsification system for waste plastic with improved heating and reduction efficiency, wherein at least one raw material containing waste plastic is transported. A heating unit for heating the raw material, a control system for controlling the heating of the heating unit, and a gas generated from the raw material heated by the heating unit are condensed to produce primary oil. It includes a condensing unit, wherein the heating unit includes a softening unit for softening the input solid raw material by heating at least some zones in a first heating manner, and a softening unit in which at least some zones are heated in a second heating manner and transferred from the softening unit. It may include a vaporizing unit for vaporizing raw materials to generate the gas, and the first heating method is made of a high-frequency induction heating method, and relatively rapid heating is possible compared to the second heating method.

The softening unit may be heated by a high-frequency induction heating method to enable relatively rapid heating compared to the vaporizing unit.

In addition, the softening unit includes a first transfer path through which the raw material in a solid state is transported and softened, and the vaporization unit transfers the softened raw material transferred from the first transfer path to a predetermined first temperature range. and a third transfer path in which fuel transferred from the second transfer path can be melted in a second temperature range higher than that of the second transfer path.

In addition, the vaporization unit may be formed by a microwave heating method using microwaves.

In addition, the evaporation unit may be characterized in that at least one of the second transfer path or the third transfer path forms an inclined structure such that the height of the end portion is higher than that of the entry portion by a predetermined height.

In addition, the heating unit may be divided into a plurality of zones, and the control system may control heating in different temperature ranges for each of the plurality of zones.

In the waste plastic emulsification system with improved heating and reduction efficiency according to another embodiment of the present invention for solving the above technical problem, heating the raw material including at least one transfer path through which the raw material including the waste plastic is transported A heating unit for heating, a control system for controlling the heating of the heating unit, and a condensing unit for condensing gas generated from a raw material heated by the heating unit to produce primary oil, wherein the heating unit is in a solid state. A softening unit including a first transfer path through which the raw material is transported and softened, and a second transfer path through which the softened raw material transferred from the first transfer path is transferred and allowed to be melted in a predetermined first temperature range, and A third transfer path in which the fuel transferred from the second transfer path can be melted in a second temperature range higher than that of the second transfer path is included, and the softened raw material transferred from the softening unit is vaporized to generate the gas. It may include a vaporizing unit for the vaporization, and the vaporizing unit may be characterized in that at least one of the second transfer path or the third transfer path forms an inclined structure so that the height of the distal end is higher by a predetermined height compared to the initial portion. .

According to the technical concept of the present invention, although the power consumption is relatively large, the efficiency of the waste plastic emulsification system can be greatly improved by appropriately using the high-frequency induction heating method, which is capable of relatively rapid heating, and the microwave heating method, which consumes relatively little power. It is possible to increase the amount of raw materials that can be processed at one time, so there is an effect that the waste plastic emulsification system can be enlarged.

In addition, there is an effect of preventing carbonization of the raw material in the conveying passage and increasing melting/melting efficiency through the formation of the inclined structure of the conveying passage.

In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.
1 shows a schematic configuration of a waste plastic emulsification system with improved heating and reduction efficiency according to an embodiment of the present invention.
2 shows a schematic configuration of a heating unit according to an embodiment of the present invention.
3 is a view for explaining a heating method to be applied to a heating unit according to an embodiment of the present invention.
4 is a view for explaining a double screw structure of a transfer path according to an embodiment of the present invention.
5 and 6 show a schematic configuration of a heating unit according to another embodiment of the present invention.
7 schematically shows a microwave transmitter and a microwave sensitive heating device according to an embodiment of the present invention.
8 shows a schematic configuration of a control system according to an embodiment of the present invention.
8 shows a schematic configuration of a pre-processing unit according to an embodiment of the present invention.

In order to fully understand the present invention and the advantages in operation of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like members.

1 shows a schematic configuration of a waste plastic emulsification system with improved heating and reduction efficiency according to an embodiment of the present invention, and FIG. 2 shows a schematic configuration of a heating unit according to an embodiment of the present invention.

Referring to FIG. 1, the waste plastic emulsification system (100, hereinafter referred to as the waste plastic emulsification system) with improved heating and reduction efficiency according to an embodiment of the present invention includes a pretreatment unit 110, a heating unit 120, and a condensation unit. 130 , the purification unit 140 , and/or a control system 150 for controlling heating and/or heating temperature of the heating unit 120 .

Raw materials containing waste plastics may be pulverized through the preprocessing unit 110, and after removing iron-containing foreign substances, they may be introduced into the heating unit 120 in a state in which moisture is removed. The configuration of the pre-processing unit 110 for this purpose is shown in FIG.

9 shows a schematic configuration of a pre-processing unit according to an embodiment of the present invention.

Referring to FIG. 9 , the preprocessing unit 110 according to an embodiment of the present invention pulverizes the raw material (raw material containing waste plastic) in a solid state, and the pulverized raw material can be transferred to the magnetic drum 112. . Then, foreign substances of iron components, not plastic components, may be removed from the magnetic drum 112 .

In this way, the raw material from which iron-based foreign substances are removed from the magnetic drum 112 is transported to the drying device 113 so that moisture can be removed. At this time, the drying device 113 may dry the raw material by using, for example, warm air.

In addition, as the transfer path included in the heating unit 120 is heated, the raw material transferred along the transfer path may be heated and melted and/or melted.

According to an embodiment of the present invention, in order to prevent air contact with the raw material during the continuous process, oxygen may be removed by filling the conveying path of the raw material with nitrogen. When air is contacted during the transfer process of the raw material or the ratio of oxygen is high, there is a risk of explosion when the raw material is heated through the heating unit 120 to be described later, removing the air layer (oxygen) from the transfer path that can be important

On the other hand, according to the technical idea of the present invention, the heating unit 120 can be divided into a softening unit for heating and softening the raw material that is pulverized in a solid state and a vaporization unit for re-heating and vaporizing the softened fuel. have. In the present specification, the softening unit and the vaporizing unit may be meant to distinguish a plurality of transfer paths provided to heat and transfer raw materials, rather than necessarily referring to any separate components or devices. Of course, depending on the embodiment, the softening unit and the vaporizing unit may be implemented as separate devices.

In addition, in the present specification, the softening of a raw material may mean a state in which the raw material is softened by heating and changed to a gel-like physical property.

According to an embodiment, the softening unit and/or the vaporizing unit may each include a transfer path through which the raw material is heated and transported. For example, the softening unit may include a first transfer path 121, and the vaporization unit may include two transfer paths, that is, a second transfer path 122 and a third transfer path 123. It can be. The configuration of the heating unit 120 will be described with reference to FIG. 2 .

2 shows a schematic configuration of a heating unit according to an embodiment of the present invention.

2, in the waste plastic emulsification system 100 according to an embodiment of the present invention, the heating unit 120 includes a first transfer path 121, a second transfer path 122, and a third transfer path ( 123) may be configured. As described above, the first transfer path 121 is a softening unit for rapidly softening the raw material in a solid state, and the second transfer path 122 and the third transfer path 123 continuously heat the softened material. It can be divided into a vaporization unit for vaporization while doing so.

The figure shows a case where the heating part 120 includes a total of three transfer paths, that is, a first transfer path 121, a second transfer path 122, and a third transfer path 123, but the present invention This is not necessarily limited to this. For example, a plurality of transfer paths may be provided in the softening unit, the vaporization unit may be provided with only one transfer path, or three or more plural transfer paths may be provided in the vaporization unit. Even in this case, it can be easily inferred by an average expert in the technical field to which the present invention belongs that the technical idea of the present invention, which will be described later, can be equally applied. Hereinafter, as described above, the heating unit 120 is provided with three transfer paths, that is, the first transfer path 121, the second transfer path 122, and the third transfer path 123. Let me explain the case with an example.

In the first transfer path 121 divided into the softening unit, the raw material input in a solid state can be softened as quickly as possible, and then the vaporization unit, that is, the second transfer path 122 and the third transfer path ( The raw material softened in 123) may be vaporized while continuously heating to collect gas for primary oil production. To this end, at least a portion of the first transfer path 121 may be heated by a predetermined first heating method, and at least one of the second transfer path 122 and/or the third transfer path 123 Some zones may be heated by a predetermined second heating method different from the first heating method.

In one embodiment, the first heating method may be a high frequency induction heating method using high frequency induction, and the second heating method may be a microwave heating method using microwaves.

In high-frequency induction heating, alternating magnetic flux is generated by flowing alternating current through the coil using electromagnetic induction, so that induced current (eddy current) flows in the object to be heated, and Joule heat is generated by this induced current, and heating is performed using this. can mean doing. Since the technical idea related to such high-frequency induction heating is already widely known, a detailed description thereof will be omitted herein. Hereinafter, in this specification, for convenience of description, a method of performing heating using electromagnetic induction generated by flowing current through a coil will be referred to as a high-frequency induction heating method.

In the case of such a high-frequency induction heating method, rapid heating of the object to be heated may be possible compared to other methods, and thus may be suitable for the softening unit for relatively quickly softening a raw material in a solid state. However, in the case of high-frequency induction heating, energy consumption is relatively high compared to the microwave heating method using microwaves, which will be described later, or conventional general band heaters and other heat sources, but the heating efficiency is excellent, enabling rapid heating as described above. This can have the effect of improving the overall efficiency of the waste plastic emulsification process.

For such high-frequency induction heating, although not shown in the drawing, a coil for electromagnetic induction may be provided in advance in the first transfer path 121 . In addition, a predetermined power system for sending current to the coil may be provided. Since the power supply system for induction heating is already known, further detailed descriptions will be omitted.

Meanwhile, the vaporizing part, that is, the second conveying passage 122 and the third conveying passage 123 may be heated in a different way from the softening part, that is, the first conveying passage 121 .

According to an embodiment, a microwave heating method using microwaves may be applied to the second transfer path 122 and the third transfer path 123. Hereinafter, in the present specification, a method of heating a predetermined object to be heated (eg, transfer paths) using a predetermined microwave sensitive heating device and/or a microwave transmitter, as will be described later for convenience of description, is described using microwaves. Let's call it a heating method.

To this end, a microwave sensitive heating device and a microwave transmitting device may be provided in the second transfer path 122 and the third transfer path 123, that is, the vaporization unit.

The microwave transmitting device may be controlled by the control system 150, and the microwave sensitive heating device is heated while responding to the microwave transmitted from the microwave transmitting device, and the microwave sensitive heating device is heated. The second transfer path 122 and/or the third transfer path 123 may be respectively heated by a mold heating device. This microwave method will be described again later.

The high-frequency induction heating method applied to the softening unit, that is, the first transfer path 121, and the microwave method applied to the vaporization unit, that is, the second transfer path 122 and the third transfer path 123, As described above, each has its own characteristics and advantages and disadvantages. This will be briefly described with reference to FIG. 3 .

3 is a view for explaining a heating method to be applied to a heating unit according to an embodiment of the present invention.

First, FIG. 3A is a diagram for explaining a heating method using microwaves. As will be described later, the microwave sensitive heating device provided on the surface or housing 124 of the transfer path is first heated, and the surface or housing ( 124) is heated, and accordingly, while the inside of the transfer path is heated, the material transferred from the inside can be heated.

In the case of the high-frequency induction heating method shown in FIG. 3B, heat can be induced not only from the surface of the transfer path or the housing 124 but also from the inner steel 125, so that the heating surface area can be relatively widened. Therefore, the high-frequency induction heating method is capable of relatively rapid heating compared to the method using microwaves, and thus can have an effect of softening a large amount of raw material in a relatively quick time.

However, as described above, in the case of the high-frequency induction heating method, energy consumption is high compared to the microwave method, so there is a risk that the overall process efficiency of the waste plastic emulsification system 100 may be lowered.

Therefore, the present invention applies a high-frequency induction heating method capable of relatively rapid heating to the softening unit, that is, the first transfer furnace 121, where the solid-state raw material is first introduced into the heating unit 120, so that the solid-state raw material is relatively quickly In the evaporation unit, that is, the second transfer path 122 and the third transfer path 123, where the raw material is softened and subsequent processes (eg, melting/melting process) proceed, the microwave method consumes relatively little energy. By applying the, it is possible to greatly improve the efficiency of the entire process of the waste plastic emulsification system 100.

On the other hand, according to the technical concept of the present invention, the heating unit 120 has an effect of softening and melting/melting of the raw material more smoothly and efficiently by heating the raw material through processes having different temperature ranges. can

Melting in the present specification may mean a process in which a raw material in a solid state is heated and softened, or a process in which a raw material in a gel state after being softened to a certain level is heated in a relatively low temperature range. For example, the melting of the raw material may refer to a process performed in the first transfer path 121 and the second transfer path 122 or in the second transfer path 122 .

In addition, melting may refer to a process of heating the melted (softened) raw material again in a relatively high temperature range. For example, when the material melted in the second transfer path 122 of the softening unit and/or the vaporizing unit is transported to and melted in the third transfer path 123 of the vaporizing unit, the third transfer path 123 It can be heated in a relatively high temperature section compared to the second transfer path 122 . In this case, the melted raw material may be in a relatively softened or further softened state compared to the melted raw material.

In this case, as shown in the drawing, in the second transfer furnace 122 in which melting is performed, among raw materials having a relatively low melting point, raw materials having a relatively low melting point are vaporized first to the condensing unit 130. can be supplied. In addition, as the third transfer furnace 123 is heated in a higher temperature range than the second transfer furnace 122 and melting proceeds, even raw materials having a relatively high melting point among the materials are vaporized and the condensation unit 130 ) can be supplied with gas.

Differentiating the temperature range for each process as described above may be to prevent raw materials having a relatively low melting point among softened fuels from being carbonized without being vaporized due to rapid heating.

According to an embodiment, the second transfer path 122 included in the vaporization unit may be classified as a melting device, and the third transfer path 123 may be classified as a melting device. Hereinafter, in the present specification, a case in which the second transfer path 122 is classified as the melting device and the third transfer path 123 is classified as the melting device is described as an example, and the respective names may be used interchangeably. The scope of the present invention is not necessarily limited thereto. For example, depending on the embodiment, the second transfer path 122 may be classified as the melting device, and the third transfer path 123 may be classified as the melting device.

On the other hand, according to the technical idea of the present invention, the heating unit 120 may be implemented to have different temperature ranges for each transfer path in which each process is performed as described above, but even one transfer path has a temperature range. It can also be implemented to have different zones.

Hereinafter, in the present specification, it is said that a specific temperature range (eg, a second temperature range) has a higher temperature than other temperature ranges (eg, a first temperature range), compared to the average temperature of the entire first temperature range. This may mean that the average temperature of the entire second temperature range is relatively high. However, this does not necessarily mean that the entire range of the second temperature range always has a higher temperature than the highest temperature range of the first temperature range.

For example, the average temperature of the entire second temperature range may be higher than the average temperature of the entire first temperature range, but in some intervals (zones) of the second temperature range, some intervals of the first temperature range ( zone) may have the same or similar temperature as the temperature, and depending on embodiments, the temperature of some zones (zones) of the second temperature zone may have a lower temperature than that of some zones (zones) of the first temperature zone. may be

For example, the first temperature range may have a temperature range of about 50°C to about 300°C, and the second temperature range may have a temperature range of about 250°C to about 700°C. .

In other words, the first temperature section and the second temperature section may have a relatively higher temperature than the first temperature section in the overall average temperature, but a part of each temperature section overlaps with each other. can be heated with

For example, the second temperature range may have a temperature of at least 250°C or higher, and may be heated to about 600°C to 700°C in the highest temperature range. In this case, the lowest temperature section in the second temperature section may have a temperature of about 260°C. In one example, the second temperature range may be a temperature range applied to the third transfer path 123 classified as a melting unit among the vaporizing units. At this time, the entrance portion of the third transfer path 123 may be a portion into which the material melted at the distal end of the aforementioned melting device, that is, the second transfer path 122 is input. Accordingly, the third transfer path 123 ) may be heated to the same, similar, or lower temperature as the end portion of the second transfer passage 122 (that is, the highest temperature section of the first temperature section).

On the other hand, as described above, the heating unit 120 heats the raw material step by step by having different temperature ranges for each transfer path and / or for each zone (eg, Z1 to Z10) in each transfer path By doing so, rapid carbonization of the raw material can be prevented and more efficient reduction/melting can be achieved.

For example, as shown in FIG. 2 , the heating unit 120 sequentially passes through the first transfer path 121, the second transfer path 122, and the third transfer path 123. It can be implemented so that raw materials are transported. At this time, in each transfer path, the temperature range of the heating temperature may be different for each zone (eg, Z1 to Z10) so that the raw material can be heated step by step.

According to an embodiment, the softening unit included in the heating unit 120, that is, the first transfer path 121 is transferred from the above-described pre-processing unit 110 and the raw material input to one end is It can be softened (or melted) while being transferred to the other end by the rotation of the screw provided inside the first transfer path 121 . At this time, a high-frequency induction heating method may be used for the first zone Z1 and the second zone Z2 of the first transfer path 121 shown in FIG. Then, it can be transferred to the second transfer path 122 for processing. In one example, the front end of the first zone Z1 and the second zone Z2 of the first conveying passage 121 may indicate a section in which air is injected to remove impurities from the input solid state raw material.

And, as shown in the drawing, the second transfer furnace 122 in which melting is performed is divided into four zones (eg, Z3 to Z6) and can be heated in a different temperature range for each zone, and similarly, the third zone in which melting is performed The transfer path 123 may also be heated to have different temperature ranges for each zone (eg, Z7 to Z10).

In one embodiment of the present invention, the zone included in the softening unit, that is, the temperature range of the first zone Z1 and the second zone Z2 of the first transfer path 121 is such that the raw material in a solid state is softened ( Or, it may have a temperature that can be melted). For example, in the first conveying passage 121, the raw material is heated to a temperature range enough to soften, but the temperature range may be such that the softened raw material does not vaporize. Of course, depending on the embodiment, the temperature range in which the first transfer path 121 is heated may be free as long as the raw material can be softened in a solid state.

Zones (eg, Z3 to Z10) included in the evaporation unit may be sequentially heated to have a high temperature range. That is, in the second conveying furnace 122 for melting, heating is performed to have a gradually higher temperature section from the initial section toward the end section along the conveying direction, and in the third conveying furnace 123 for melting, the initial It may be implemented to be heated to have a relatively high temperature section compared to each section of the second transfer path 122 from the section, and to be heated to a higher temperature section toward the end section.

According to the embodiment, each transfer path of the vaporization unit, that is, the sixth zone (Z6), which is the end section of the second transfer path 122, and the tenth zone (Z6), which is the end section of the third transfer path 123 ( Z10) may be implemented to have a relatively low temperature section compared to each of the preceding zones.

This may be for proper agitation of the softened raw material transported inside each transfer path and prevention of carbonization of the raw material through this. In this case, the screw inside at least one of the transfer paths is implemented to include a rotating blade formed so that the rotation direction of a portion of the distal end is opposite to the rotation direction of the remaining sections, and the raw material transferred from any transfer path to the distal end. It is possible to prevent unvaporized or less-softened fuel from remaining as much as possible while returning to a partial section in a section where the direction of rotation is reversed. A configuration for this is shown in FIG. 4 .

4 is a view for explaining a double screw structure of a transfer path according to an embodiment of the present invention.

4, the end section of the first screw 10 and the second screw 20 corresponding to the end section of the melting device 122 (that is, of the transfer device 1 having a double screw structure) In the terminal section), reverse rotation blades (eg, 13 and 23) may be formed. The reverse rotating blades (eg, 13 and 23) mean rotating blades formed so that the rotating directions of the first rotating blade 12 and the second rotating blade 22 are opposite to the rotating direction of the remaining sections. can That is, in the end section of the conveying device 1 having the double screw structure, the first screw 10 and the second screw 20 rotate in a certain direction, but the conveying directions of the end section and the remaining sections are opposite. It can be implemented to be directional.

For example, when the melting device 122 is divided into three sections, the conveying direction in the initial section and the middle section and the conveying direction in the end section may be opposite to each other. These sections can be set to various lengths according to the user's needs, and accordingly, the reverse rotating blades (eg, 13 and 23) can also be formed within various ranges as needed.

According to the technical concept of the present invention, when the raw material transported inside the melting device 122 reaches the end section, the raw material is returned to the middle section by a screw having a reverse conveying direction in the end section. can

Raw materials including waste plastics are softened and transferred to a gel state through the melting/melting process as described above, rather than being completely dissolved and converted into a liquid state while being heated. In addition, due to the nature of plastic, the thermal conductivity is relatively very low, so it is difficult for the raw material being transported to melt/melt evenly, and it is easy to solidify again in a softened state. There may be a risk that the transfer itself may be blocked.

Therefore, as described above, by making the fuel return to a certain level in the opposite direction to the conveying direction at the end section of the conveying path and reciprocating for a certain period of time in a certain section, so that the fuel is properly stirred and no unsoftened or unvaporized fuel remains. can do.

On the other hand, according to another embodiment of the present invention, as described in FIG. 4, in addition to simply forming the rotation direction of the screw in the end section of the transfer path in the opposite direction, efficiency can be greatly improved by implementing the transfer path itself to have an inclination. have. Examples of this are shown in FIGS. 5-6 .

5 and 6 show a schematic configuration of a heating unit according to another embodiment of the present invention.

First, referring to FIG. 5 , the heating part 120 may be formed such that at least one transfer path has an inclined structure such that an end portion in a transfer direction is higher than an initial portion by a predetermined height. That is, in the conveying path having an inclined structure, the softened fuel also fills the inside of the conveying path obliquely as shown in the drawing, which results in a wider surface area of the fuel, and thus has the effect of greatly improving the heating efficiency. have. Therefore, even when various kinds of mixed waste plastics are included in the raw material, it is possible to greatly reduce the discharge of the fuel while being carbonized without being softened or vaporized, thereby improving the efficiency of the waste plastic emulsification system 100 as well as the system compared to the prior art. There is an advantageous effect that the size of itself can be made possible.

As such, the transfer path formed to have an inclined structure may be included in the vaporizing unit.

Referring to FIG. 6 , an example in which the second transfer path 122 and the third transfer path 123 included in the vaporization unit have an inclined structure at a predetermined angle is illustrated. Of course, the present invention is not limited to the form shown in FIG. 6, and it can be easily inferred by an average expert in the technical field to which the present invention belongs that the transfer route having an inclined structure can be determined in various ways as needed. will be.

Meanwhile, the vaporized raw material is discharged to the condensing unit 130 in a gaseous state, and is softened while being condensed in the condensing unit 130 to produce primary oil as described above.

As shown in FIG. 2, the vaporization device, that is, the second transfer path 122 and the third transfer path 123, respectively, while the softened fuel is reduced/melted, the vaporized gas (organic gas) is transferred to the condensation unit. It can be implemented so that it can be discharged to (130).

As described above, the condensing unit 130 may generate primary oil by condensing and softening the gas in which the raw material is vaporized by heating the heating unit 120, and the condensation unit 130 generates the The primary oil may be purified by the refining unit 140 to finally produce oil.

In the heating unit 120 shown in FIG. 2, the gas discharge portion where the fuel is vaporized and the gas is discharged is implemented to be located at predetermined positions in the second transfer path 122 and the third transfer path 123 Although the case is shown, the present invention is not necessarily limited thereto.

The location of the gas discharge part as needed, as well as the number of formations for each transfer path, may be implemented in various ways.

In this way, the gas discharged from the vaporization device, that is, the second transfer path 122 and/or the third transfer path 123 is transported to the condensing unit 130 and condensed to be used to produce oil, Alternatively, the gas discharged from the vaporizer may be transferred to a predetermined energy production system (not shown) that generates energy by burning waste gas.

Meanwhile, unlike the first transfer path 121 using a high-frequency induction heating method, the second transfer path 122 and/or the third transfer path 123 of the vaporization device uses a microwave as described above. A wave heating method may be used.

A microwave transmitter and a microwave sensitive heating device for this will be described with reference to FIG. 7 .

7 schematically shows a microwave transmitter and a microwave sensitive heating device according to an embodiment of the present invention.

Referring to FIG. 7 , when microwaves are output from the microwave transmitter 200, the microwave sensitive heating device 300 in response to the output microwaves may generate heat.

At this time, the microwave sensitive heating device 300 is disposed on the surface of the heating unit 120, particularly, the vaporizing unit (eg, the second transfer path 122 and / or the third transfer path 123), When heat is generated, it may be implemented to heat the vaporizing unit. And the microwave transmitter 200 is directed toward the vaporizing unit from the outside of the vaporizing unit (ie, the microwave sensor attached to the surface of the second transfer path 122 and/or the third transfer path 123). toward the mold heating device 300) may output microwaves.

The microwave-sensitive heating device 300, which generates heat in response to microwaves, includes a responsive heating element made of silicon carbide and silicon nitride, and low thermal expansion sintering made of magnesium oxide, silicon dioxide, aluminum oxide, titanium dioxide, and lithium oxide. It may include a binder and a metal compound made of at least one of nickel, cobalt, and tungsten carbide.

The sensitive heating element including a ceramic material made of silicon carbide and silicon nitride can generate heat up to a temperature desired by the user within several seconds to several tens of seconds, and has the effect of producing high performance at a relatively low cost, and is plate-shaped, rod-shaped, It can also be used to mold into either a columnar shape or a honeycomb shape.

In the drawings for explaining the present invention, a case in which the microwave sensitive heating device 300 is formed in a plate shape with a rectangular cross section is shown, but the scope of the present invention is not limited thereto, and the microwave sensitive heating device 300 is not limited thereto. The device 300 may be formed in various shapes as described above as needed.

In addition, the low thermal expansion sintered binder may have an effect of preventing cracks from occurring even when the microwave sensitive heating device 300 is crystallized into a stabilized shape to increase thermal shock resistance and rapid temperature change during heating.

In addition, the waste plastic emulsification system 100 varies the number of the microwave sensitive heat generating device 300 for each region of the heating unit 120, in particular, the vaporizing unit, or the output of the microwave transmitter 200 It may be implemented to vary the heat generation degree of the microwave sensitive heating device 300 for each zone by changing.

Meanwhile, the configuration of the control system 150 for controlling the output of the microwave transmitter 200 or controlling the high-frequency induction heating of the first transfer path 121 is shown in FIG. 8 .

8 shows a schematic configuration of a control system according to an embodiment of the present invention.

Referring to FIG. 8 , the control system 150 according to an embodiment of the present invention may include an input unit 151, a temperature sensor 152, and/or a control unit 153.

The input unit 151 may receive input information including a set temperature from a user. Depending on the implementation example, the input unit 151 may manually receive input information further including information about the degree of output of the microwave transmitter 200 from the user.

The temperature sensing unit 152 may include a predetermined sensor capable of sensing temperature. Referring to FIG. 4 , the temperature sensor 152 may detect temperature information of at least one of an internal temperature of the transfer path 121-2 and a surface temperature of the transfer path 121-2.

As described above, the microwave sensitive heating device 300 is provided on the surface of the transfer path 121-2 and heats the transfer path 121-2 while generating heat. Accordingly, the transfer path 121 The temperature of the surface of -2) may be measured higher than the internal temperature of the transfer path 121-2. However, since the raw material is located inside the transfer path 121-2 and is heated, it may be desirable to accurately measure the temperature inside the transfer path 121-2 in order to measure the temperature at which the material is heated. have.

Then, the controller 153 can control high frequency induction in the first transfer path 121 or control the output of the microwave transmitter 200 based on the input information and the temperature information.

That the control unit 153 controls high-frequency induction may mean controlling the amount of current to flow through the coil or controlling whether or not to flow current. In addition, the control unit 143 controls the output of the microwave transmission device 200 means that the control unit 153 varies the frequency of the microwave output by the microwave transmission device 200, or It may mean that the output range, which is the range that the microwave reaches from the microwave transmitter 200, is different.

For example, the control unit 153 may control the microwave transmission device 200 to output microwaves according to the input information input by the input unit 151 . As described above, since the heating temperature of the heating part 120 is in the range of at least several hundred degrees Celsius, the microwave sensitive heating device 300 can generate heat as much as possible at first. Thereafter, the control unit 153 compares the temperature information detected by the temperature sensor 152 with the input information, and transmits the microwave so that the temperature information can reach the input information, that is, the set temperature. Device 200 can be controlled.

For example, when the current temperature information sensed by the temperature sensor 152 is lower than the set temperature, the control unit 153 controls the microwave sensitive heating device 300 to continuously generate heat, or The microwave transmitter 200 may be controlled to generate heat at a higher temperature.

When the current temperature information detected by the temperature sensor 152 is higher than the set temperature, the control unit 153 transmits the microwave to prevent the microwave sensitive heating device 300 from generating any more heat. The device 200 may be controlled, or the microwave transmitting device 200 may be controlled so that the microwave sensitive heating device 300 generates heat at a lower temperature.

That is, the controller 153 controls the temperature information to reach the set temperature or maintains the temperature information at the current temperature through a feedback action on the temperature information obtained from the temperature sensor 152. By controlling the transmission device 200, it is possible to achieve easy and efficient temperature control. As described above, this control may be performed in the same or similar manner in high-frequency induction.

On the other hand, when the gas is condensed by the condensing unit 130, organic matter is accumulated in a plurality of gas passages provided inside the plurality of condensers included in the condensing unit 130, and the gas passages are clogged or the gas passages are blocked. A choke phenomenon in which the passage of the gas flow path is narrowed may occur.

Briefly describing the process of condensing the gas in the condenser 130, a plurality of gas flow channels into which the gas flows may be provided inside a first condenser among the plurality of condensers as described above. It may be implemented to cool and soften the gas introduced into the gas flow channels by flowing cold water around the gas flow channels inside the plurality of condensers.

At this time, in the process of softening the gas, the coking phenomenon may occur as organic matter accumulates in the gas passage and the gas passage is blocked or the gas transfer passage is narrowed.

When such a coking phenomenon occurs, the smooth inflow of the gas is hindered, and the internal pressure may increase, causing a risk of explosion. Therefore, when the coking phenomenon occurs, it is necessary to solve and/or mitigate the coking phenomenon in the corresponding gas flow path.

As described above, in the prior art, in order to solve this coking phenomenon, the tank or gas flow path (pipe) of the system is disassembled and cleaned, or the operation of the system is stopped and a separate cleaning liquid (eg, alkali, acid, chlorine agent and / or a surfactant, etc.) has been mainly used.

In this conventional method, since the operation of the system must be stopped in any case, the continuity of the emulsification process of waste plastic is inevitably lowered, and there are problems such as a decrease in efficiency and an increase in incidental costs.

Therefore, the present invention solves the above-mentioned problems by providing a technical idea capable of solving the coking phenomenon by using the primary oil generated by the condensing unit 130 during the process without stopping the emulsification process of waste plastic. can be solved

For example, as described above, the condensing unit 130 passes through the pre-processing unit 110 and the heating unit 120, and the vaporized gas may be introduced. At this time, each of the plurality of condensers may be connected to inflow passages through which the gas is introduced.

According to an embodiment of the present invention, not all of the plurality of condensers are normally used, but the gas may be introduced and condensed only in a first condenser among the plurality of condensers. For example, a flow path connected to the first condenser is opened so that the gas can flow into the first condenser, and a flow path connected to the second condenser is disconnected so that the gas can flow into the second condenser. The emulsification process may proceed.

Then, when the coking phenomenon occurs in the gas flow path inside the first condenser, the waste plastic emulsification system 100 blocks the inflow of the gas into the first condenser, and the gas flows into the second condenser. can make it possible

And while condensation of the gas is progressing through the second condenser, the coking phenomenon of the first condenser can be solved.

In this case, even if the coking phenomenon occurs in the first condenser, there is no need to stop the operation of the system for cleaning the first condenser, so that a waste plastic emulsification process can be performed continuously.

In addition, according to the technical idea of the present invention for this purpose, the waste plastic is not in the conventional method such as disassembling the first condenser in which the gas is no longer introduced from the heating unit 120 or injecting a separate cleaning solution. The coking phenomenon of the first condenser can be solved by using the emulsification process.

For example, a supply passage through which the primary oil stored in the above-described oil tank can be supplied to the plurality of condensers is connected, and the primary oil is introduced into the first condenser where the coking phenomenon occurs, and the primary oil is supplied to the condensers. The coking phenomenon can be solved by oil.

The primary oil may be stored in the oil tank and supplied to the corresponding condenser when the coking phenomenon occurs, but preferably, the primary oil is heated and heated as described above by the oil tank. Supplying the primary oil to the first condenser may be more effective in resolving the coking phenomenon.

At this time, for heating the oil tank, the microwave transmitting device 200 and the microwave sensitive heating device 300 according to the technical idea of the present invention may be used.

Meanwhile, in order to determine whether the coking phenomenon has occurred in the gas flow path in the plurality of condensers, the waste plastic emulsification system 100 further includes a flow rate sensor (not shown) capable of detecting the flow rate of the gas flow path. can include

According to one embodiment, the flow rate sensor (not shown) may be implemented as a predetermined sensor system capable of detecting the flow of gas. The flow of gas may mean, for example, the speed at which the gas flows and/or the amount of the gas flowing in a certain section.

The flow rate detection unit (not shown) detects whether or not the coking phenomenon occurs based on the change in the gas flow inside the gas flow passage, which changes when the passage area of the gas flow passage 10 is narrowed due to the coking phenomenon occurring in the gas flow passage. can judge In addition, the waste plastic emulsification system 100 may control whether or not to inflow/block the gas to/from each of the plurality of condensers (open/close the passage) according to the determination result of the flow rate sensor (not shown).

Although the present invention has been described with reference to an embodiment shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached claims.

Claims (3)

In the waste plastic emulsification system with improved heating and reduction efficiency,
a heating unit for heating the raw material including at least one transfer path through which the raw material including waste plastic is transported;
a control system for controlling the heating of the heating unit; and
A condensing unit for condensing gas generated from the raw material heated by the heating unit to produce primary oil,
the heating part,
a softening unit including a first transfer path through which the input solid raw material is transported and softened; and
A second transfer path in which the softened raw material transferred from the first transfer path is transferred and can be melted in a predetermined first temperature range, and a fuel transferred from the second transfer path is higher than that of the second transfer path. A vaporization unit for generating the gas by vaporizing the softened raw material transferred from the softening unit, including a third transfer path that can be melted in 2 temperature ranges;
Each of the second transfer path and the third transfer path is divided into a plurality of zones, and heating is performed so that each zone has a gradually higher temperature section from the beginning section to the end section along the transfer direction,
The waste plastic emulsification system with improved heating and reduction efficiency, characterized in that the zone corresponding to the inlet section of the third transfer path is heated to have a higher temperature section than each zone of the second transfer path.
The method of claim 1, wherein the vaporization unit,
Waste plastic emulsification system with improved heating and reduction efficiency, characterized in that at least one of the second transfer path and the third transfer path forms an inclined structure so that the height of the end portion is higher than the initial portion by a predetermined height.
The method of claim 1, wherein the first transfer furnace is heated by a high-frequency heating method,
The second transfer path and the third transfer path are made of a microwave heating method using microwaves, and the waste plastic emulsification system with improved heating and reduction efficiency.

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