KR20220136662A - Continuous wax separation apparatus, apparatus for producing pyrolysis oil from combustible waste including the same, and method for producing pyrolysis oil by the same. - Google Patents

Abstract

The present invention relates to a device for manufacturing pyrolysis oil from combustible waste, including a continuous wax separating device having excellent removal efficiency of high boiling point wax that causes clogging of a device in a process of manufacturing pyrolysis oil from combustible waste, and a method for manufacturing pyrolysis oil using the same. The present invention includes a primary transport pipe and a secondary transport pipe.

Description

A continuous wax separation apparatus, an apparatus for producing pyrolysis oil from combustible waste including the same, and a method for producing pyrolysis oil by the same. {Continuous wax separation apparatus, apparatus for producing pyrolysis oil from combustible waste including the same, and method for producing pyrolysis oil by the same.}

The present invention relates to a continuous wax separation apparatus, an apparatus for producing pyrolysis oil from combustible waste including the same, and a method for producing pyrolysis oil by the same.

With the development of the 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 when it is of very high purity, but when it is of low purity, it costs a lot to recycle, so it is not good in economic terms.

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, in the conventional pyrolysis method, rapid thermal decomposition cannot be achieved, and the process of separating and crushing the waste synthetic resin is required before the pyrolysis process, and thus profitability is low.

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. The pyrolysis gas generated in the pyrolysis reactor is composed of substances having various carbon numbers. In particular, when pyrolyzing polyolefin-based plastics, a large amount of wax is produced below 640°C. The wax produced in this way not only causes problems in process operation such as clogging of pipes, but also because pyrolysis oil contains a large amount of wax. It is less likely to be used as an oil. Therefore, in order to solve this problem when producing fuel oil by thermally decomposing waste vinyl, waste plastic, etc., there is a demand for the development of a technology in which wax is smoothly removed and the productivity of oil is not lowered.

In order to solve this problem, Korean Patent No. 10-2029047 discloses a pyrolysis device having a wax reprocessing device, but there is still a problem in that the cost of the pyrolysis device is increased by wax, and the Korean Patent No. 10-0994244 discloses a technology for separating the wax component contained therein by colliding the pyrolysis gas through the collision plate, but there is a problem that oil productivity is lowered because it is difficult to collect and reuse the high boiling point wax. There is a need for improvement.

Republic of Korea Patent No. 10-2029047 (2019.10.07) Republic of Korea Patent No. 10-0994244 (2010.11.12)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a continuous wax separation device having excellent removal efficiency of high boiling point wax that causes clogging in a pyrolysis oil production process from combustible waste.

In addition, an object of the present invention is to obtain high-quality oil from which high-boiling point wax is effectively removed, oil yield is improved by preventing oil components from being contained in the residue discharged from the pyrolysis reactor, and combustible waste that can minimize the recycling cost of combustible waste An object of the present invention is to provide an apparatus for producing pyrolysis oil from waste and a method for producing pyrolysis oil using the same.

In order to achieve the above object, the present invention primary wax separator; a secondary wax separator connected to the primary wax separator through a first transfer pipe; As a continuous wax separation device comprising a,

The first transfer tube is branched from the upper end of the primary wax separator in a curved form and is connected to the upper end of the secondary wax separator; and

a secondary transfer pipe that is branched downward from one side of the upper region than the middle region of the primary wax separator and is laminated with the primary transport pipe; It provides a continuous wax separation device comprising a.

In one embodiment of the present invention, the diameter (D ₁ ) of the primary transfer pipe may be greater than the diameter (D ₂ ) of the secondary transfer pipe.

In one embodiment of the present invention, a heater may be installed in the primary transfer pipe.

In one embodiment of the present invention, the primary wax separator and the secondary wax separator may have a width greater than a height.

In one embodiment of the present invention, the secondary wax separator may have a height greater than a width.

In one embodiment of the present invention, a barrier wall may be installed inside the secondary wax separator to allow the pyrolysis gas derived from the primary wax separator to stay in the secondary wax separator for a predetermined time. .

In one embodiment of the present invention, the upper end of the primary wax separator may be connected to the primary pyrolysis reaction device, and the lower ends of the primary wax separator and the secondary wax separator may be connected to the secondary pyrolysis reaction device. .

In one embodiment of the present invention, the pyrolysis temperature of the secondary pyrolysis reactor may be higher than the pyrolysis temperature of the first pyrolysis reactor.

In one embodiment of the present invention, the first pyrolysis reactor may be a rotary kiln-type pyrolysis reactor, and the second pyrolysis reactor may be a screw-type pyrolysis reactor.

In one embodiment of the present invention, the pyrolysis gas derived from the secondary wax separator is transferred to a heat exchanger through a tertiary transfer pipe, and then collected and stored in an oil storage tank in the form of oil by cooling,

The tertiary transfer pipe may be branched in a curved form from the upper end of the secondary wax separator and connected to the upper end of the heat exchanger.

In one embodiment of the present invention, a heater may be installed in the tertiary transfer pipe.

Another aspect of the present invention provides an apparatus for producing pyrolysis oil including the above-described continuous wax separation apparatus.

Another aspect of the present invention provides a method for producing pyrolysis oil in which oil is produced by thermally decomposing waste vinyl with the above-described pyrolysis oil production apparatus.

The present invention provides a continuous wax separation apparatus, an apparatus for producing pyrolysis oil from combustible waste including the same, and a method for producing pyrolysis oil by the same, wherein the continuous wax separation apparatus is clogged in a pyrolysis oil production process from combustible waste The removal efficiency of high boiling point wax causing

In addition, it is possible to obtain high-quality oil from which high-boiling point wax is effectively removed through the pyrolysis oil production apparatus from combustible waste including the continuous wax separation apparatus according to an aspect of the present invention.

In addition, according to the apparatus for producing pyrolysis oil from combustible waste and the method for producing pyrolysis oil by the apparatus including a continuous wax separation apparatus according to an aspect of the present invention, the residue discharged from the pyrolysis reactor does not contain an oil component, so the oil yield This is significantly improved, and there is an effect that can minimize the recycling cost of combustible waste.

1 is a schematic diagram for explaining a continuous wax separation apparatus and an apparatus for producing pyrolysis oil from combustible waste including the same according to an embodiment of the present invention.

Hereinafter, a continuous wax separation apparatus 100 according to the present invention, an apparatus for producing pyrolysis oil from combustible waste including the same, and a method for producing pyrolysis oil by the apparatus 100 according to the present invention will be described in detail with reference to FIG. 1 .

At this time, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of effectively describing particular embodiments only and is not intended to limit the invention. In addition, the unit of additives not specifically described in the specification may be weight %.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context dictates otherwise.

The present invention has superior removal efficiency of high-boiling wax compared to the conventional pyrolysis oil production system from combustible waste, so it is possible to obtain high-quality oil from which high-boiling wax is effectively removed, and oil components are not included in the residue discharged from the pyrolysis reactor. Provided are a continuous wax separation device 100 capable of improving oil yield by reducing the cost of combustible waste recycling and minimizing the cost of recycling combustible waste, a pyrolysis oil production device from combustible waste including the same, and a pyrolysis oil production method by the same.

In this case, the combustible waste includes, for example, waste plastic, waste rubber, waste synthetic resin such as waste vinyl, and biomass, but is not necessarily limited thereto. In particular, the waste synthetic resin and biomass may be low-grade wastes containing trace amounts of soil and inorganic materials such as aluminum coatings. In the present invention, the combustible waste may contain 20 parts by weight or more of biomass.

The present invention will be described in detail as follows.

A continuous wax separation apparatus 100 according to an aspect of the present invention includes a primary wax separator 110;

a secondary wax separator 120 connected to the primary wax separator 110 through a first transfer pipe; As a continuous wax separation device 100 comprising a,

The first transfer pipe is branched from the upper end of the primary wax separator 110 in a curved shape and is connected to the upper end of the secondary wax separator 120; and

a secondary transfer pipe 112 that is branched downward from one side of the upper region than the middle region of the primary wax separator 110 and is laminated with the primary transport pipe 111; may include

According to the present invention, as the secondary transfer pipe 112 is branched from one side higher than the middle region of the primary wax separator 110, the pyrolysis gas from the primary wax separator 110 is preferentially transferred to the 2 The residual material that can be transferred through the primary transfer pipe 112 and that is not transferred through the secondary transfer pipe 112 has a relatively large diameter and is branched from the upper end of the primary wax separator 110 . It may be transferred through the car transfer pipe 111 .

In addition, since the primary transfer pipe 111 is branched in a curved shape, it is possible to minimize the introduction of the high boiling point wax derived from the primary wax separator 110 into the primary transfer pipe 111 .

In addition, the secondary transport pipe 112 is branched so as to be inclined downward and is combined with the primary transport pipe 111 , so that the pyrolysis gas transferred through the secondary transport pipe 112 and the primary transport pipe 111 are ), the pyrolysis gas transferred through the pyrolysis gas can be combined more smoothly.

In the present invention, the diameter (D ₁ ) of the primary transfer pipe 111 may be greater than the diameter (D ₂ ) of the secondary transfer pipe 112 .

At this time, the diameter (D ₁ ) of the primary transfer pipe 111 may be 2 to 10in, preferably 4 to 8in, more preferably 5 to 7in, but is not necessarily limited thereto. In addition, the diameter (D ₂ ) of the secondary transfer pipe 112 may be 1 to 5 inches, preferably 2 to 4 inches, more preferably 2.5 to 3.5 inches, but is not necessarily limited thereto.

According to the present invention, by making the diameter of the secondary transport pipe 112 smaller than the diameter of the primary transport pipe 111, the pyrolysis gas derived from the primary wax separator 110 is preferentially transferred to the secondary transport pipe. It may be transferred through the 112 , and it is possible to minimize the introduction of the high boiling point wax derived from the primary wax separator 110 into the secondary transfer pipe 112 .

In the present invention, a heater may be further installed in the primary transfer pipe 111 . When the wax separator is used for a long period of time, the high-boiling and high-viscosity wax gradually accumulates on the inner surface of the primary transfer pipe 111 to cause clogging, so the heater melts the accumulated wax through heating, It serves to flow the molten wax back to the primary wax separator 110 along the primary transfer pipe 111 in the form of. To this end, the heater is preferably installed in an area adjacent to the primary wax separator 110 among the entire area of the primary transfer pipe 111 , but is not limited thereto.

In the present invention, the primary wax separator 110 may have a width greater than a height. More specifically, the width and height of the primary wax separator 110 are determined by the amount of raw material input per hour. For example, if the raw material processing amount is 1 ton/day, the width of the primary wax separator 110 may be 50 cm or more and the height may be 30 cm or more, and if the raw material processing amount is 5 tons/day, the width of the primary wax separator 110 is It may be 80 cm or more and 50 cm or more in height, but is not necessarily limited thereto.

In addition, in the present invention, the volume of the primary wax separator 110 may be determined by the internal temperature of the separator. As the internal temperature increases, the volume of the separator also increases, so that the wax and residues in the vapor phase product move downward. Although it is preferable for deriving the effect according to the present invention because it can be well separated into

Since the primary wax separator 110 has the same size and shape as described above, the pyrolysis gas can have a sufficient residence time in the primary wax separator 110, and the removal efficiency of high boiling point wax can be significantly improved. It works.

In the present invention, the secondary wax separator 120 may have a height greater than a width. More specifically, the width and height of the secondary wax separator 120 are determined by the amount of raw material input per hour. For example, if the raw material processing amount is 1 ton/day, the width of the primary wax separator 110 may be 30 cm or more and the height may be 50 cm or more, and if the raw material processing amount is 5 tons/day, the width of the primary wax separator 110 is It may be 50 cm or more and 80 cm or more in height, but is not necessarily limited thereto.

In addition, in the present invention, the volume of the secondary wax separator 120 may be determined by the internal temperature of the separator, and the higher the internal temperature, the larger the volume of the separator is. Although it is preferable for deriving the effect according to the present invention because it can be well separated into

In the present invention, inside the secondary wax separator 120, a barrier wall ( 121) may be installed.

At this time, the thickness of the barrier wall 121 is not particularly limited as long as the effect according to the present invention can be derived, and the length of the barrier wall 121 is one-third to the height of the secondary wax separator 120 . It may be two-thirds, preferably, one-half to two-thirds, but is not necessarily limited thereto. When the blocking wall 121 completely blocks from the upper part of the tank of the secondary wax separator 120 to more than 1/3 of the secondary wax separator 120, the left and right spaces of the secondary wax separator 120 are respectively Since it is wide enough that only the wax and residue components in the vapor phase can move downward, there is an advantage in that the wax component and the oil and gas can be effectively separated in the vapor phase product.

Since the barrier wall 121 that satisfies the above length is installed inside the secondary wax separator 120, the pyrolysis gas inside the secondary wax separator 120 can stay for a certain period of time without directly flowing out, so that the high boiling point wax There is an effect that can significantly improve the removal efficiency of the.

In the present invention, the upper end of the primary wax separator 110 is connected to the primary pyrolysis reaction device 200, and the lower ends of the primary wax separator 110 and the secondary wax separator 120 are secondary pyrolysis It may be connected to the reaction device 300 .

In this case, the thermal decomposition temperature relationship of the first pyrolysis reactor 200 and the secondary pyrolysis reactor 300 may satisfy T ₁ < T ₂ .

The thermal decomposition temperature (T ₁ ) of the primary pyrolysis reaction device 200 may be 350 to 550 °C, preferably 400 to 550 °C, more preferably 500 to 550 °C, but not necessarily limited thereto it is not doing In addition, the thermal decomposition temperature (T ₂ ) of the secondary pyrolysis reaction device 300 may be 400 to 650 °C, preferably 450 to 650 °C, more preferably 500 to 650 °C, but not necessarily The present invention is not limited thereto. Combustible waste is mainly waste vinyl or waste plastic, which is usually pyrolyzed at 350℃. PE, which is relatively slow to thermally decompose and produces a lot of wax, is pyrolyzed well at a higher temperature, and it is preferable to treat the secondary reactor at a higher temperature than the primary reactor.

In the present invention, various known pyrolysis devices may be used as the pyrolysis reactor, and it is more preferable to use a rotary kiln-type pyrolysis reactor as the primary pyrolysis reactor 200, but this is only a non-limiting example. It is not necessarily limited to this.

In the rotary kiln type pyrolysis reactor, heat is applied to the whole while the furnace is rotated, so that the internal waste is decomposed into molten and pyrolysis gas and carbonized residue by high temperature. In the rotary kiln-type pyrolysis reactor, pyrolysis is performed after inputting waste for pyrolysis efficiency, and the pyrolysis may be performed sufficiently before discharging. In addition, it is possible to suppress the generation of dioxins generated in the incineration process in which oxygen is injected because decomposition is made at high heat under anoxic conditions.

A rotary kiln-type pyrolysis reactor can be operated as a system in which pyrolysis is continuously performed while continuously inputting raw materials as long as the raw material inlet part is stably blocked from oxygen and leakage is suppressed. Since the inflow of waste is stopped, it is possible to provide continuity of operation by connecting multiple rotary kiln-type pyrolysis reactors in parallel. For example, while the solid residue is transferred to the secondary pyrolysis reactor 300 in the first rotary kiln-type pyrolysis reactor, waste plastic is introduced in the first rotary kiln-type pyrolysis reactor, and in the second rotary kiln-type pyrolysis reactor Each unit can be operated in turn to carry out the pyrolysis process.

The pyrolysis method of combustible waste using a rotary kiln type pyrolysis reactor may be performed continuously or semi-continuously. Pyrolysis performed only in continuous mode has a problem that the entire process is stopped if a problem occurs in the device during pyrolysis, and pyrolysis performed only in semi-continuous mode generates too many residues due to irregular operation and reduces throughput. There is a problem of high work intensity.

The rotary kiln-type pyrolysis reactor may have an internal structure capable of providing sufficient contact time so that the input raw material, combustible waste, is sufficiently pyrolyzed to be separated into pyrolysis gas and inorganic residues and discharged.

On the other hand, the secondary pyrolysis reaction device 300 may be a device in which a pyrolysis reaction smoothly occurs at a high temperature (T ₂ > T ₁ ) by simply heating to have a temperature gradient, and the internal structure is a screw-type transport for transporting residues A reactive group having a form is more preferable, but this is only a non-limiting example and is not necessarily limited thereto.

For mass treatment of combustible waste, the first pyrolysis reactor 200 and the secondary pyrolysis reactor 300 may be connected in parallel to each other so that continuous thermal decomposition can be performed.

In addition, when a rotary kiln-type pyrolysis reactor and another type of pyrolysis reactor are efficiently combined and used, waste can be rapidly pyrolyzed while maximizing the pyrolysis effect of waste.

In the present invention, the primary wax separator 110 may be connected to the primary pyrolysis reaction device 200 by a transport device, wherein the transport device may include a primary connector pipe and a secondary connector pipe. have.

As described above, when the primary pyrolysis reaction device 200 and the primary wax separator 110 are connected to a transfer device including a plurality of connection pipes, clogging occurs in some connection pipes due to long-term use of the pyrolysis device However, there is an advantage that the pyrolysis gas derived from the primary pyrolysis reaction device 200 can be smoothly transferred through another connection pipe.

In the present invention, the pyrolysis gas derived from the secondary wax separator 120 is transferred to the heat exchanger 400 through the tertiary transfer pipe 122, and then collected in the oil storage tank in the form of oil by cooling. and stored as

The tertiary transfer pipe 122 may be branched from the upper end of the secondary wax separator 120 in a curved form and connected to the upper end of the heat exchanger 400 .

In the present invention, the diameter (D ₃ ) of the tertiary transfer pipe 122 may be greater than the diameter (D ₄ ) of the quaternary transfer pipe.

In the present invention, a heater may be further installed in the curved area of the tertiary transfer pipe 122 . When the wax separator is used for a long period of time, the high-boiling and high-viscosity wax gradually accumulates on the inner surface of the tertiary transfer pipe 122 to cause clogging, so the heater melts the accumulated wax through heating, It serves to flow the molten wax back to the secondary wax separator 120 along the tertiary transfer pipe 122 in the form. To this end, the heater is preferably installed in a region adjacent to the secondary wax separator 120 among the entire region of the tertiary transfer pipe 122 , but is not limited thereto.

In the present invention, the pyrolysis gas from which the high boiling point wax component from the secondary wax separation device has been removed is introduced into a heat exchanger, and then transferred to a pyrolysis oil fractionation and storage device, and pyrolysis according to step-by-step cooling with a temperature gradient By condensing the gas, oil, which is a low-boiling-point product, can be secured.

The pyrolysis oil derived from the pyrolysis gas from which the high boiling point wax component has been removed also has a wide carbon number distribution. In addition, the pyrolysis gas directly transferred to the pyrolysis oil fractionation and storage device also has a wide carbon number distribution. Therefore, the pyrolysis oil classification and storage device has a structure in which low-boiling-point oil is collected step by step, and relatively high-boiling-point substances are collected in the primary separation device with a relatively high temperature, and relatively low molecular number in the secondary separation device with a relatively low temperature. Oil of about the gasoline range with

Oil that is sequentially separated and collected in the pyrolysis oil classification and storage device can be transferred to and stored in an oil storage tank. It is possible to improve the quality of the oil through step-by-step continuous treatment.

Another aspect of the present invention provides an apparatus for producing pyrolysis oil from combustible waste including the continuous wax separation apparatus 100 .

The apparatus for producing pyrolysis oil from combustible waste according to the present invention can obtain high-quality oil from which high-boiling point wax is effectively removed, oil yield is improved by preventing oil components from being contained in the residual water discharged from the pyrolysis reactor, and combustible waste It has the effect of minimizing the recycling cost of

In addition, another aspect of the present invention provides a method for producing pyrolysis oil for producing oil by thermally decomposing combustible waste with the pyrolysis oil production device from the combustible waste, wherein the pyrolysis oil has a high boiling point wax component removed it could be

100: continuous wax separation device
110: primary wax separator
111: primary transfer pipe
112: secondary transfer pipe
120: secondary wax separator
121: barrier
122: 3rd transfer pipe
200: primary pyrolysis reactor
300: secondary pyrolysis reactor
400: heat exchanger

Claims (13)

primary wax separator;
a secondary wax separator connected to the primary wax separator through a first transfer pipe; As a continuous wax separation device comprising a,
The first transfer tube is branched from the upper end of the primary wax separator in a curved form and is connected to the upper end of the secondary wax separator; and
a secondary transfer pipe that is branched downward from one side of the upper region than the middle region of the primary wax separator and is laminated with the primary transport pipe; A continuous wax separation device comprising a. The method of claim 1,
The diameter of the primary transfer pipe (D ₁ ) is a continuous wax separation device greater than the diameter (D ₂ ) of the secondary transfer pipe. The method of claim 1,
A continuous wax separation device in which a heater is installed in the primary transfer pipe. The method of claim 1,
and the primary wax separator and the secondary wax separator have a width greater than a height. The method of claim 1,
The secondary wax separator is a continuous wax separator, wherein the height is greater than the width. The method of claim 1,
A continuous wax separation device having a barrier wall installed inside the secondary wax separator to allow the pyrolysis gas derived from the primary wax separator to stay in the secondary wax separator for a predetermined time. The method of claim 1,
An upper end of the primary wax separator is connected to a primary pyrolysis reactor, and lower ends of the primary wax separator and the secondary wax separator are connected to a secondary pyrolysis reactor. 8. The method of claim 7,
The pyrolysis temperature of the secondary pyrolysis reactor is a continuous wax separation device that is higher than the pyrolysis temperature of the primary pyrolysis reactor. 8. The method of claim 7,
The primary pyrolysis reactor is a rotary kiln-type pyrolysis reactor, and the secondary pyrolysis reactor is a screw-type pyrolysis reactor. The method of claim 1,
The pyrolysis gas derived from the secondary wax separator is transferred to a heat exchanger through a tertiary transfer pipe, and then collected and stored in an oil storage tank in the form of oil by cooling,
The tertiary transfer pipe is branched in a curved form from the upper end of the secondary wax separator and is connected to the upper end of the heat exchanger. 11. The method of claim 10,
A continuous wax separation device in which a heater is installed in the tertiary transfer pipe. 12. A pyrolysis oil production apparatus comprising the continuous wax separation apparatus according to any one of claims 1 to 11. A method for producing pyrolysis oil by pyrolyzing waste vinyl with the pyrolysis oil production device according to claim 12 .

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