KR20210133021A - Separation and moving apparatus of wax in pyrolysis oil from pyrolysis system of plastic waste, and its including pyrolysis system - Google Patents

Abstract

The present invention relates to a wax separation and transfer device used in a pyrolysis device for waste, and a pyrolysis device including the same. In the wax separation and transfer device used in the pyrolysis device for waste, a primary connector pipe 321 and a secondary connector pipe 320 connected to the lower end transport device 250 at the outlet side of the pyrolysis device 200 for pyrolyzing waste ); a chamber 310 whose lower end is connected to the secondary connection pipe 320, is connected to the primary connection pipe 321 in the middle region, and has a larger diameter than the secondary connection pipe 320; a primary transport pipe 330 branched from one side higher than the middle region of the chamber 310; a secondary transfer pipe 340 connected to the upper end of the chamber 310; and a gas inlet pipe 650 where the primary transport pipe 330 and the secondary transport pipe 340 are laminated. .

Description

Separation and moving apparatus of wax in pyrolysis oil from pyrolysis system of plastic waste, and its including pyrolysis system}

The present invention relates to an apparatus and process for obtaining oil by thermally decomposing waste such as biomass and waste synthetic resin for recycling waste.

With the development of industry, the production of products using plastics or synthetic rubber as raw materials is rapidly increasing, but the recycling rate of waste synthetic resins such as waste plastics and rubber is only insignificant compared to the total production. The main cause of this phenomenon is that it takes a lot of money to recycle waste synthetic resin. The recycling of waste synthetic resin costs a lot of money for various reasons, but the main reason is that the waste synthetic resin contains various substances. That is, the waste synthetic resin can be recycled if it is of very high purity, but a lot of cost is consumed for recycling if it is of low purity. Therefore, it is not good from an economic point of view, and even if it is recycled, there is a limit to recycling due to deterioration in quality after reuse.

As a technology for recycling waste synthetic resins while reducing costs, there is a method of thermally decomposing waste synthetic resins. The pyrolysis recycling method of waste synthetic resin is a method of obtaining oil by melting and decomposing waste synthetic resin by applying high heat to waste synthetic resin, and refining various oils obtained from the decomposition product. However, the existing domestic pyrolysis and oil industry has a low level of technology, so there is a lot of manpower input, and the work environment of the workers is too bad, so a lot of foreign manpower is used, and the amount of treatment is small, so it is difficult to secure economic feasibility.

In addition, the pyrolysis gas generated during the pyrolysis process _{contains wax with a high boiling point (number of carbons: C 23} ~ C ₅₀ ), which acts as a hindrance to the operation of the downstream refining process. Wax (wax) may be a generic term for carbon-based compounds that may exist in a solid state under low temperature conditions because they have a property of being easily hardened into a high boiling point material under reaction, transport and/or storage conditions. Therefore, in the production of pyrolysis oil from waste, the boiling point standard of the high boiling point wax to be separated and removed according to the production process conditions of the pyrolysis oil and the conditions of use thereof may vary. In particular, the pyrolysis gas generated in the pyrolysis reactor is composed of materials with various carbon numbers. Among them, wax, a high boiling point material, has low utilization due to clogging of the device, so it is separated and pyrolyzed again in the pyrolysis reactor. Process structure is needed Moreover, as wax is an inhibitory component that deteriorates the quality of oil, it is important to separate and remove the high boiling point wax from the pyrolysis gas.

1 is a schematic configuration diagram of a conventional system for producing pyrolysis oil from waste. As shown in FIG. 1 , the waste plastic is fed into the input device 110 and is fed into the pyrolysis device 200 by the upper transfer device 210 . The pyrolysis device 200 may be a rotary kiln, and the pyrolyzed residues are discharged by the bottom transport device 250 .

At this time, the pyrolysis gas generated in the lower transfer device 250 is converted into oil while passing through the wax separator 300 and the condenser 601 . Conventionally, a primary separator 301 , a secondary separator 302 , and a tertiary separator 303 are used to stepwise separate wax of high boiling point from pyrolysis gas.

The side and lower portions of the primary separator 301 are connected to the upper portion of the lower transfer device 250 , and the upper portion of the primary separator 301 is connected to the side surface of the secondary separator 302 . The lower portion of the secondary separator 302 is connected to the upper portion of the lower transfer device 250 , and the upper portion of the secondary separator 302 is connected to the side surface of the tertiary separator 303 . The lower part of the tertiary separator 303 is connected to the lower side of the secondary separator 302 , and the upper part of the tertiary separator 303 is connected to the condenser 601 through the gas inlet pipe 650 . The primary, secondary, and tertiary separators (301, 302, 303) separate the pyrolysis gas and the wax by changing the flow rate. That is, the pyrolysis gas injected into the side surfaces of the primary, secondary, and tertiary separators 301, 302, and 303 has a stagnation time, and thus is separated into a low boiling point pyrolysis gas and a high boiling point wax. The low boiling point pyrolysis gas is supplied to the condenser 601 , and the high boiling point wax falls back to the lower transfer device 250 .

However, such a conventional wax separator has a complicated device, and the flowing wax is stagnant and the pipe is often clogged. When the pipe is closed, the operation of the pyrolysis device 200 is stopped and the operation is resumed after the closed pipe is pierced or replaced after waiting until it is cooled. This requires a lot of time and manpower, and caused inefficiency and inefficiency due to long-term facility shutdown. Therefore, research on a wax separator capable of separating wax from pyrolysis gas while using a simple structure was required.

1. Japanese Patent Laid-Open No. 2001-323283 (Method for recovering oil from waste plastics); 2. Korean Patent Laid-Open No. 10-2010-0125568 (Apparatus and method for continuously obtaining high-grade oil from waste synthetic resin using a rotary kiln type pyrolysis device), 3. Korean Patent Laid-Open No. 10-2013-0038634 (Energy-saving multi-stage rotary kiln).

Therefore, the present invention has been proposed to solve the above problems, and an object of the present invention is to be used in a pyrolysis device for waste that can easily separate and remove wax from pyrolysis gas generated in a pyrolysis device for waste. To provide a wax separation and transfer device and a pyrolysis device including the same.

Another object of the present invention is to provide a wax separation and transfer device used in a pyrolysis device for waste that can be continuously operated by removing high boiling point wax causing clogging of the device, and a pyrolysis device including the same.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

An object of the present invention is, in a wax separation and transport device used in a pyrolysis device for waste, a primary connection pipe 321 connected to the lower transport device 250 at the outlet side of the pyrolysis device 200 for thermally decomposing waste; secondary connector 320; a chamber 310 whose lower end is connected to the secondary connection pipe 320, is connected to the primary connection pipe 321 in the middle region, and has a larger diameter than the secondary connection pipe 320; a primary transport pipe 330 branched from one side higher than the middle region of the chamber 310; a secondary transfer pipe 340 connected to the upper end of the chamber 310; and a gas inlet pipe 650 where the primary transport pipe 330 and the secondary transport pipe 340 are laminated. .

In addition, the secondary connection pipe 320 and the chamber 310 are installed upright or inclined so that the separated wax 430 can flow down.

In addition, the gas inlet pipe 650 is installed vertically, and the secondary transport pipe 340 is curved and connected between the upper end of the chamber 310 and the gas inlet pipe 650 .

In addition, a heater 350 for heating the secondary transfer pipe 340 is further provided.

In addition, the diameter (φ1) of the primary transport pipe 330 is smaller than the diameter (φ2) of the secondary transport pipe 340 .

In addition, the primary transport pipe 330 is installed to be inclined downward from the chamber 310 to the gas inlet pipe 650 .

In addition, the gas inlet pipe 650 is further provided with a sight glass 640 to see the inside.

In addition, it is connected to the gas inlet pipe 650, further comprising a condenser for condensing the low-boiling pyrolysis gas 450, the condenser is connected to the gas inlet pipe 650, the primary condenser maintained at a first temperature ( 600); and a secondary condenser 610 connected in series with the primary condenser 600 and maintained at a second temperature lower than the first temperature.

In addition, the primary condenser 600 is installed at a lower position than the secondary condenser 610 .

In addition, a heat exchanger 630 for preliminary condensation is further provided between the gas inlet pipe 650 and the primary condenser 600 .

In addition, the primary connection pipe 321 is connected to the chamber 310 so as to be perpendicular to the secondary connection pipe 320 .

In addition, the secondary connecting pipe 320 is connected to the middle region of the lower transport device 250 , and the primary connector 321 is connected to the end region of the lower transport device 250 .

The object of the present invention can also be achieved by a pyrolysis apparatus for waste including a wax separation and transfer apparatus, characterized in that it includes the above-described wax separation and transfer apparatus as another embodiment.

In addition, the lower end transfer device 250 on the exit side of the pyrolysis device 200 is capable of forward rotation or reverse rotation.

For this reason, there is an advantage in that the high boiling point wax contained in the pyrolysis gas can be effectively and sufficiently separated and the high boiling point wax can be recycled back to the pyrolysis reaction device. This makes it possible to obtain high-quality oil.

In addition, by removing the high boiling point wax that causes clogging of the thermal decomposition device, continuous operation is possible, thereby securing high economic efficiency.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so the present invention is described in such drawings It should not be construed as being limited only to
1 is a schematic block diagram of a conventional system for producing pyrolysis oil from waste;
2 is a schematic configuration diagram of a pyrolysis device for waste according to an embodiment of the present invention;
3 is an enlarged view of the wax separation and transfer device 300 of FIG. 2 .

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component. When a component is referred to as being “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, “between” and “immediately between” or “neighboring to” and “directly adjacent to”, etc., should be interpreted similarly.

The singular expression is to be understood as including the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the described feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms defined in the dictionary should be interpreted as being consistent with the meaning of the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

configuration of the embodiment

Hereinafter, the configuration of the waste pyrolysis device and the wax separation and transfer device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 2 is a schematic configuration diagram of a pyrolysis device for waste according to an embodiment of the present invention, and FIG. 3 is an enlarged view of the wax separation and transfer device 300 of FIG. 2 .

First, in the present invention, examples of waste include waste plastics, waste synthetic resins such as waste rubber, biomass, and the like. In particular, it may be a low-grade waste containing inorganic substances such as trace amounts of soil and aluminum coatings contained in waste synthetic resin and biomass.

And, in the present invention, wax may be a generic term for carbon-based compounds that can easily exist in a solid state as a high boiling point material under reaction, transport and/or storage conditions.

The input device 110 may be disposed upstream of the pyrolysis device 200, and waste is input.

The upper transport device 210 is installed between the input device 110 and the pyrolysis device 200 and is a screw-type transport device. At this time, the raw material in a molded and non-molded form is transferred from the input device 110 to the upper transfer device 210 . The upper transfer device 210 may be configured as a first-stage and two-stage screw-type transfer device, and includes a shut-off valve (not shown). The shut-off valve (not shown) may have a structure capable of purging nitrogen gas to primarily block air and block oxygen/air inflow.

On the other hand, before supplying the waste to the pyrolysis device 200, it is possible to reduce the volume of the waste through the reducing machine.

The pyrolysis device 200 is also referred to as a pyrolysis reactor, and although a rotary kiln type pyrolysis reactor is a representative embodiment, a continuous stirred tank (CSTR) type pyrolysis reactor may be used. The pyrolysis device 200 may be installed in multiple stages (a primary pyrolysis device and a secondary pyrolysis device) as needed. The pyrolysis device 200 is a device that pyrolyzes waste and unreacted residues such as biomass and waste synthetic resin by applying heat to melt and decompose. Accordingly, the lower transfer device 250 is connected to the downstream of the pyrolysis device 200 . Since the pyrolysis device 200 pyrolyzes the waste at a high temperature (eg, 300 to 650 ℃), high-temperature pyrolysis gas and solid residues are formed. On the other hand, in order to pyrolyze the unreacted residue in the pyrolysis device 200, a secondary pyrolysis device (not shown) having a higher temperature may be continuously installed. The solid residue generated in the pyrolysis device 200 may include the high boiling point wax 430 separated by the wax separator 300 and flowing down. The thermal decomposition temperature of the pyrolysis device 200 is 300 ~ 650 ℃, preferably 400 ℃, 450 ℃, may be 500 ℃. If the input raw material is waste vinyl, it is set to maintain the range of 370 ~ 500 ℃.

The rotary kiln-type pyrolysis device 200 applies heat from the entire furnace while rotating so that the internal waste is decomposed into molten and pyrolysis gas and carbonized residue by high temperature. The rotary kiln-type pyrolysis device 200 may be pyrolyzed after inputting waste for pyrolysis efficiency, and may proceed to a process of discharging the pyrolysis after sufficient pyrolysis. In addition, it is possible to suppress the generation of dioxins generated in the incineration process by decomposition at high heat under anoxic conditions.

In the rotary kiln-type pyrolysis device 200, pyrolysis is performed while continuously introducing fuel, and pyrolysis gas can be continuously released at the same time. It is also possible to provide continuity of work by connecting multiple numbers in parallel. For example, in the plurality of pyrolysis devices 200, the introduction of waste plastic and the pyrolysis process may be alternately performed.

The pyrolysis method of waste using the rotary kiln type pyrolysis device 200 may be performed continuously or semi-continuously. Pyrolysis performed only continuously has a problem that the entire process is stopped if a problem occurs in the device during pyrolysis, and pyrolysis performed only semi-continuously may have low product quality and may generate more residues. There is a problem in that the amount of work can be reduced, the throughput is reduced, and the work intensity is high.

Since the heat source of the pyrolysis device 200 may use self-produced pyrolysis gas and pyrolysis oil, it is possible to reduce the cost of energy for a heat source supplied from the outside necessary to heat the reactor. Pyrolysis gas is a fairly high energy source and can serve to increase thermal power. For example, it may be used to increase the heating temperature by supplying it to the rotary kiln type pyrolysis device 200 . Therefore, the generated pyrolysis gas is not released into the atmosphere, but is reused as an energy source for recycling waste. In addition, although there is a difference in the degree of pyrolysis gas supplied to the heat source of the pyrolysis device 200 , there is an effect of improving the atmosphere by burning and removing it as an air pollutant for a heat source.

The lower transfer device 250 is installed at the rear end of the pyrolysis device 200, and discharges the residue to the waste tank. A shut-off valve (not shown) is also installed in the lower transfer device 500 to block the air in the pyrolysis device 200 . The lower transfer device 250 may be configured as a screw-type transfer device, such as the upper transfer device 210 , and may be rotated forward or reversed by a controller (not shown). The reverse rotation is for backflowing the residue and high boiling point wax back to the pyrolysis device 200 .

The lower transfer device 250 has a structure divided into an upper portion and a lower portion, and a screw is installed in the lower portion to transfer solid residues, and a wax separation and transfer device 300 is installed in the upper portion to transfer the pyrolysis gas.

The lower transport device 250 may further include a cooling transport device and a collecting device for cooling and packaging the residue.

As shown in FIG. 3 , the wax separation and transfer device 300 is installed between the lower transfer device 250 and the primary condenser 600 . The lower end of the secondary connecting pipe 320 is connected to the upper portion of the middle region of the entire length of the lower transfer device 250 , and the upper end of the secondary connecting pipe 320 is vertically connected to the lower end of the chamber 310 . The secondary connection pipe 320 may be installed upright or inclined so that a portion of the vapor phase product 400 rises while the wax 430 flows down. Preferably, it is good to be installed vertically.

One end of the primary connection pipe 321 is installed vertically at the end of the lower transfer device 250 , the middle area is bent at 90 degrees, and the other end is connected to the middle height area of the chamber 310 . The primary connection pipe 321 allows the residual vapor phase product 400 to pass therethrough. Accordingly, the secondary connection pipe 320 is connected in the axial direction of the vertical cylindrical chamber 310, in a direction perpendicular to the axial direction of the chamber 310 of the primary connection pipe 321 (that is, in the horizontal direction). Connected.

The primary connection pipe 321 serves as a bypass passage when the secondary connection pipe 320 is blocked, and in the chamber 310, the vapor phase pyrolysis gas flows only in one direction upward, allowing the high boiling point wax to easily flow. It also has a function to easily catch the high boiling point wax contained in the pyrolysis gas in the chamber 310 by preventing it from flowing in the lateral direction.

The chamber 310 has a cylindrical shape, and the diameter and volume are larger than those of the secondary connection pipe 320 . The chamber 310 serves to separate the wax by slowing the flow rate of the incoming vapor phase product 400 . The chamber 310 may be installed upright or inclined so that the separated wax 430 can flow down. Preferably, it is good to be installed vertically.

The primary transport pipe 330 is branched so as to be inclined downward from one side at a height above the middle height of the chamber 310 (that is, a height higher than the primary connection pipe 321), and the other end of the primary transport pipe 330 is It is laminated to the middle region of the gas inlet pipe (650). Since the primary transport pipe 330 is installed to be inclined downward, the pyrolysis gas of the primary transport pipe 330 and the pyrolysis gas of the secondary transport pipe 340 can be smoothly combined.

One end of the secondary transport pipe 340 is connected to the upper end of the chamber 310 , the middle region is curved to form an arc, and the other end is connected to the gas inlet pipe 650 . The secondary transfer pipe 340 forms a round arc to prevent even a small amount of wax contained in the pyrolysis gas from flowing into the gas inlet pipe 650 and to flow down along the chamber 310 .

The heater 350 is installed in the curved region of the secondary transport pipe 340 to heat the secondary transport pipe 340 . When the wax separator 300 is used for a long period of time, wax of high boiling point and high viscosity is gradually deposited on the inner surface of the secondary transport pipe 340 , and the secondary transport pipe 340 may be clogged. The heater 350 heats the blocked secondary transfer pipe 340 so that the molten wax flows toward the chamber 310 . To this end, the heater 350 is preferably installed close to the chamber 310 side of the entire secondary transfer pipe 340 .

In addition, the diameter (φ1) of the primary transport pipe 330 is smaller than the diameter (φ2) of the secondary transport pipe. By reducing the diameter φ1 of the primary transport pipe 330 , it is possible to minimize the flow of the flowing wax 430 into the primary transport pipe 330 . In particular, only the vapor phase of the vapor phase product 400 introduced as the primary transport pipe 330 is branched in the middle height region of the chamber 310 may preferentially exit through the primary transport pipe 330 . Since the secondary transport pipe 340 has a relatively large diameter (φ2), the residual vapor phase product 400 that has not passed through the primary transport pipe 330 passes through.

The gas inlet pipe 650 is installed vertically, the upper end is connected to the curved primary transport pipe 340 , and the lower end is connected to the primary condenser 600 . In addition, a sight glass 640 through which the inside can be seen is further installed in the region where the primary transport pipe 330 and the secondary transport pipe 340 are laminated among the gas inlet pipe 650 .

The heat exchanger 630 is installed between the sight glass 640 and the primary condenser 600 on the gas inlet pipe 650 . The heat exchanger 630 is for pre-cooling the low-boiling pyrolysis gas 450 to enter the primary condenser 600, and a double heat exchanger may be applied.

The primary condenser 600 may secure oil, which is a low-boiling-point generation oil, through the condensation of the low-boiling pyrolysis gas 450 . The low boiling point pyrolysis gas 450 has a wide distribution of carbon number. Accordingly, the primary condenser 600 and the secondary condenser 610 are connected in series through a connection pipe 680, and are configured as a heat exchange cooler 620 for condensation.

Each lower portion of the primary condenser 600 and the secondary condenser 610 includes a pipe and a valve for discharging oil. It is preferable that the installation height of the primary condenser 600 is lower than the installation height of the secondary condenser 610 . It is preferable to connect a pipe so that a small amount of wax flowing into the secondary condenser 610 is also collected and then flows naturally to the primary condenser 600 .

In the primary condenser 600, a higher boiling point material of the pyrolysis gas is collected, and oils such as heavy oil and kerogen are collected. In the secondary condenser 610, oil in the range of gasoline with a lower molecular number is collected. To this end, the cooler 620 condenses the primary condenser 600 at a relatively high temperature (eg, about 100 to 200 ℃), and the secondary condenser 610 at a relatively low temperature (eg, about 40 ℃). to be condensed in During the oil condensing process, a small amount of wax is collected at the bottom. Optionally, the wax collected in this way may be added in the input device 100 through a separate pump (not shown).

The gas discharge pipe 670 is installed at the upper end of the secondary condenser 670 and discharges the final pyrolysis gas 690 . The final pyrolysis gas 690 may be utilized as a heat source of the pyrolysis device 200 . Since a trace amount of foreign matter may be included in the final pyrolysis gas 690 discharged from the gas discharge pipe 670, the foreign material may be removed by passing it through a continuous filter for a gas filter.

operation of the embodiment

The waste is supplied to the upper transfer device 210 through the input device 110 . The upper transfer device 210 supplies the inputted waste to the pyrolysis device 200 . The rotary kiln type pyrolysis device 200 heats the waste in a state in which oxygen is blocked. At this time, the residue is discharged and discarded through the lower transfer device 250 , and the pyrolysis gas, which is the vapor phase product 400 , rises from the lower transfer device 250 to the secondary connection pipe 320 . The pyrolysis gas, which is the vapor phase product 400, contains oil of various boiling points.

A portion of the vapor phase product 400 (pyrolysis gas) flowing in the upper portion of the lower transfer device 250 flows in the axial direction of the chamber 310 through the secondary connection pipe 320, and the remaining vapor phase product 400 is It flows from the end of the lower transfer device 250 to the middle region of the chamber 310 through the primary connection pipe 321 . Then, the high boiling point wax 430 separated from the wax separation and transfer device 300 falls back to the screw of the lower transfer device 250 through the secondary connection pipe 320 .

On the other hand, the vapor phase product 400 rising in the vertical direction is slowed down by the chamber 310 and collides with the residual vapor phase product 400 supplied from the side through the primary connection pipe 321 . Due to this collision, the rising speed of the vapor phase product 400 is further slowed, and the chances of contacting the high boiling point and high viscosity wax on the inner wall are increased. At this time, the high boiling point wax 430 is agglomerated on the inner wall of the chamber 310 while being separated from the pyrolysis gas, and gradually flows down. The flowing wax 430 is again collected in the lower transfer device 250 , and is re-pyrolyzed through reverse rotation of the lower transfer device 250 . The pyrolyzed wax 430 is finally discarded as a residue. To this end, the lower transfer device 250 can be operated in the forward and reverse directions at any time according to the driving situation.

For example, in the case of a plastic that is easily decomposed among the plastics of the input raw material, re-pyrolysis is not required and the movable screw is operated in the forward direction. On the other hand, if there are many plastics that are difficult to decompose in the input raw material, re-pyrolysis may be performed by frequently operating in the reverse direction, or the forward and reverse directions may be alternately operated.

And, when the flow rate is slowed and stagnated in the chamber 310 , a portion of the pyrolysis gas 450 having a low boiling point in the vapor phase product 400 flows to the gas inlet pipe 650 through the primary transport pipe 330 . And, the low-boiling pyrolysis gas among the vapor phase product 400 that continues to rise flows into the gas inlet pipe 650 through the secondary transport pipe 340 .

Through the sight glass 640 installed in the area where the primary transport pipe 330 and the secondary transport pipe 340 are laminated, the state of the pipe can be visually checked, and it can be referred to for controlling the heat exchanger 630 .

The low boiling point pyrolysis gas 450 is pre-cooled by the heat exchanger 630 before being introduced into the primary condenser 600 . For example, the heat exchanger 630 pre-cools the low-boiling pyrolysis gas 450 in the range of 300 to 350° C. to be in the range of 150 to 200° C.

On the other hand, among the low boiling point pyrolysis gas 450 introduced into the primary condenser 600 , a material having a relatively higher boiling point is collected into oils such as heavy oil and kerosene, which are low boiling point production oils, through condensation.

Then, the residual pyrolysis gas is introduced into the secondary condenser 610 through the connection pipe (680). In the secondary condenser 610, oil in the range of gasoline, which is a lower molecular number, is collected due to a lower temperature (eg, around 40 ℃).

Through this, the yield of oil is 55% ~ 75%, the yield of pyrolysis gas is 5 ~ 20%, and carbohydrate is 5 ~ 15% (based on waste vinyl).

Meanwhile, the final pyrolysis gas 690 discharged from the secondary condenser 610 through the gas discharge pipe 670 may be utilized as a heat source of the pyrolysis device 200 . In this way, energy efficiency can be further improved.

The unreacted waste treated in the pyrolysis device 200 is mainly a residue left only with inorganic substances, which are transported and discarded after cooling.

The detailed description of the preferred embodiments of the present invention disclosed as described above is provided to enable any person skilled in the art to make and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a way in combination with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

110: input device,
200: pyrolysis device,
210: upper transfer device,
250: lower transfer device,
300: wax separation and transfer device,
301: primary separator,
302: secondary separator,
303: tertiary separator,
310: chamber;
320: secondary connector,
321: primary connector,
330: 1st transfer pipe,
340: secondary transport pipe,
350: heater,
400: vapor phase product;
430: wax,
450: low boiling point pyrolysis gas,
601: condenser,
600: primary condenser,
610: secondary condenser,
620: cooler,
630: heat exchanger,
640: sight glass,
650: gas inlet pipe,
670: gas discharge pipe,
680: connector,
690: final pyrolysis gas,
φ1: the diameter of the primary transport pipe,
φ2: The diameter of the secondary transport pipe.

Claims (15)

In the wax separation and transfer device used in the pyrolysis device for waste,
a primary connection pipe 321 and a secondary connection pipe 320 connected to the outlet side lower transfer device 250 of the pyrolysis device 200 for thermally decomposing waste;
a chamber 310 having a lower end connected to the secondary connection pipe 320, connected to the primary connection pipe 321 in the middle region, and having a larger diameter than the secondary connection pipe 320;
a primary transport pipe 330 branched from one side higher than the middle region of the chamber 310;
a secondary transport pipe 340 connected to the upper end of the chamber 310; and
and a gas inlet pipe (650) for laminating the primary transport pipe (330) and the secondary transport pipe (340). The method of claim 1,
The secondary connection pipe 320 and the chamber 310 are installed upright or inclined so that the separated wax 430 can flow down. . The method of claim 1,
The gas inlet pipe 650 is installed vertically,
The secondary transfer pipe (340) is a wax separation and transfer device used in a pyrolysis device for waste, characterized in that it is curved and connected between the upper end of the chamber (310) and the gas inlet pipe (650). The method of claim 1,
A wax separation and transfer device used in a pyrolysis device for waste, characterized in that a heater (350) for heating the secondary transfer pipe (340) is further provided. The method of claim 1,
The diameter (φ1) of the primary transport pipe (330) is smaller than the diameter (φ2) of the secondary transport pipe (340). The method of claim 1,
The primary transport pipe (330) is a wax separation and transport device used in a pyrolysis device for waste, characterized in that it is installed to be inclined downward from the chamber (310) to the gas inlet pipe (650). The method of claim 1,
The gas inlet pipe (650) is a wax separation and transfer device used in the pyrolysis device for waste, characterized in that the sight glass (640) to see the inside is further installed. The method of claim 1,
The wax separation and transfer device used in the pyrolysis device for waste, characterized in that it is connected to the gas inlet pipe (650) and further comprises a condenser for condensing the low boiling point pyrolysis gas (450). 9. The method of claim 8,
The condenser is
a primary condenser 600 connected to the gas inlet pipe 650 and maintained at a first temperature; and
The primary condenser 600 is connected in series, and the secondary condenser 610 is maintained at a second temperature lower than the first temperature. Wax separation and transport device. 10. The method of claim 9,
The primary condenser (600) is a wax separation and transfer device used in the pyrolysis device for waste, characterized in that it is installed at a lower position than the secondary condenser (610). 10. The method of claim 9,
A wax separation and transfer device used in a pyrolysis device for waste, characterized in that a heat exchanger (630) for preliminary condensation is further provided between the gas inlet pipe (650) and the primary condenser (600). The method of claim 1,
The primary connector (321) is a wax separation and transfer device used in a pyrolysis device for waste, characterized in that connected to the chamber (310) so as to be perpendicular to the secondary connector (320). The method of claim 1,
The secondary connection pipe 320 is connected to the middle region of the lower transfer device 250,
The primary connection pipe (321) is a wax separation and transfer device used in the pyrolysis device for waste, characterized in that connected to the end region of the lower transfer device (250). 14. A pyrolysis apparatus for waste including a wax separation and transfer apparatus, characterized in that it comprises the wax separation and transfer apparatus according to any one of claims 1 to 13. 15. The method of claim 14,
The pyrolysis device for waste including a wax separator, characterized in that the lower end transfer device 250 at the outlet side of the pyrolysis device 200 can rotate forward or reverse.

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