WO2024080857A1

WO2024080857A1 - Pyrolysis oil production system

Info

Publication number: WO2024080857A1
Application number: PCT/KR2023/016620
Authority: WO
Inventors: 이경환; 전원진; 김영두; 최선아
Original assignee: 한국에너지기술연구원
Priority date: 2022-10-13
Filing date: 2023-10-25
Publication date: 2024-04-18
Also published as: KR20240051442A

Abstract

A pyrolysis oil production system is disclosed. The pyrolysis oil production system, according to the present invention, comprises: a primary pyrolysis reaction device; a second pyrolysis reaction device having a higher pyrolysis temperature than the first pyrolysis reaction device; a primary wax separator comprising a first chamber, a first inlet pipe having one end connected to the first pyrolysis reaction device and the other end connected to a side wall of the first chamber, a first discharge pipe having one end connected to the bottom of the first chamber and the other end connected to the secondary pyrolysis reaction device, a first transfer pipe having one end connected to the top of the first chamber and the other end connected to a first storage tank, and a first plate which is provided inside the first chamber to face the first inlet pipe and is folded; a secondary wax separator comprising a second chamber, a second inlet pipe having one end connected to a side wall of the first chamber and the other end connected to a side wall of the second chamber, a second discharge pipe having one end connected to the bottom of the second chamber and the other end connected to the secondary pyrolysis reaction device, and a second transfer pipe having one end connected to the top of the second chamber and the other end connected to a second storage tank; and a third wax separator comprising a third chamber, a third inlet pipe having one end connected to a side wall of the second chamber and the other end connected to a side wall of the third chamber, a third discharge pipe having one end connected to the bottom of the third chamber and the other end connected to the secondary pyrolysis reaction device, and a third transfer pipe having one end connected to the top of the third chamber and the other end connected to a third storage tank.

Description

Pyrolysis oil production system

The present invention relates to a pyrolysis oil production system.

With the development of industry, the production of products using plastics and synthetic rubber as raw materials is rapidly increasing, but the recycling rate for waste synthetic resins such as waste plastics and waste rubber is only insignificant compared to the total production. The main reason why this phenomenon occurs is because a lot of expenses are spent on recycling waste synthetic resins, etc.

For various reasons, it costs a lot of money to recycle waste synthetic resins, etc., but the main reason is that waste synthetic resins contain various substances. In other words, waste synthetic resin, etc. can be recycled if it is of very high purity, but if it is of low purity, it costs a lot of money to recycle, so it is not good from an economic perspective.

Meanwhile, a technology for recycling waste synthetic resins while reducing costs includes thermal decomposition of waste synthetic resins. The method of recycling waste synthetic resin, etc. by thermal decomposition is a method of melting and decomposing waste synthetic resin by applying high heat to the waste synthetic resin, etc., and purifying various oils obtained from the decomposition product to obtain oil. However, the existing pyrolysis method does not achieve rapid pyrolysis, and a process of separating and crushing waste synthetic resin, etc. is required before the pyrolysis process, making it low in profitability.

In addition, the pyrolysis gas generated during the pyrolysis process contained wax with a high boiling point (carbon number: C ₂₃ ~ C ₅₀ ), which served as an obstacle to the operation of the downstream purification process.

Wax is a general term for carbon-based compounds that can easily solidify into high-boiling point substances under reaction, transport, and/or storage conditions, and thus can exist in a solid state under low-temperature conditions. Therefore, when producing pyrolysis oil from waste, the boiling point standard of the high boiling point wax to be separated and removed may vary depending on the production process conditions of the pyrolysis oil and the conditions of its use. In particular, the pyrolysis gas generated in the pyrolysis reaction device is composed of substances with various carbon numbers. In particular, when polyolefin-based plastics are thermally decomposed, 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 pipe clogging, but also causes difficulties in storage due to phase separation when pyrolysis oil contains a large amount of wax when used as fuel oil, and causes blockage of nozzles when using combustion engines, etc. The possibility of its use as a decreases. Therefore, in order to solve this problem when producing pyrolysis oil by pyrolyzing waste vinyl, waste plastic, etc., there is a need to develop a technology that allows smooth removal of wax and does not reduce oil productivity.

[Prior art literature]

[Document 1] Republic of Korea Patent No. 10-2029047 (2019.10.07.)

Therefore, the technical problem to be solved by the present invention is to provide a pyrolysis oil production system that can easily separate and remove wax contained in pyrolysis gas generated in a pyrolysis reaction device.

According to one aspect of the present invention, a first pyrolysis reaction device; a second pyrolysis reaction device having a higher pyrolysis temperature than the first pyrolysis reaction device; A first chamber, a first inlet pipe whose end is connected to the first pyrolysis reaction device and whose other end is connected to a side wall of the first chamber, and whose end is connected to the lower part of the first chamber and whose other end is connected to the secondary pyrolysis reaction device. A first discharge pipe connected to the pyrolysis reaction device, a first transfer pipe with one end connected to the upper part of the first chamber and the other end connected to the first storage tank, and a first discharge pipe connected to the first storage tank, and opposite to the first inlet pipe inside the first chamber. A first wax separator having a first plate that is prepared and folded; A second chamber, a second inlet pipe with one end connected to the side wall of the first chamber and the other end connected to the side wall of the second chamber, one end connected to the lower part of the second chamber and the other end connected to the secondary pyrolysis A secondary wax separator having a second discharge pipe connected to the reaction device and a second transfer pipe whose end is connected to the upper part of the second chamber and the other end is connected to the second storage tank; And a third chamber, a third inlet pipe, one end of which is connected to the side wall of the second chamber and the other end of which is connected to the side wall of the third chamber, one end of which is connected to the lower part of the third chamber and the other end of which is connected to the second A pyrolysis oil production system is provided including a tertiary wax separator having a third discharge pipe connected to a pyrolysis reaction device and a third transfer pipe whose end is connected to the upper part of the third chamber and the other end is connected to the third storage tank. It can be.

The first inlet pipe and the second inlet pipe are disposed to face each other on one side wall and the other side wall of the first chamber, respectively, and a large amount of wax is added to the pyrolysis gas flowing into the first chamber through the first inlet pipe. When contained, the first plate may be placed vertically in the height direction between the first inlet pipe and the second inlet pipe to prevent pyrolysis gas from flowing directly into the second inlet pipe.

The first plate may be folded vertically or horizontally by rotating both ends about the center depending on the amount of wax contained in the pyrolysis gas flowing into the first chamber through the first inlet pipe.

The inner upper side of the first chamber is formed to have a cross-sectional area that decreases toward the top, and the inner lower side of the first chamber is formed to have a cross-sectional area that decreases toward the downward side, and the first discharge pipe and the first transfer pipe are formed as the first discharge pipe and the first transfer pipe. They are disposed opposite to each other at the upper and lower portions of the chamber, and the first plate may be disposed between the first discharge pipe and the first transfer pipe.

a first cooler installed in the first transfer pipe and disposed adjacent to the first storage tank to cool the pyrolysis gas transferred to the first storage tank along the first transfer pipe; and a second transfer pipe installed in the first transfer pipe and adjacent to the first chamber, and blocking the first transfer pipe when the pyrolysis oil condensed and stored in the first storage tank is of low quality and contains foreign substances and wax. It further includes one valve, and low-quality pyrolysis oil condensed and stored in the first storage tank can be returned to the first pyrolysis reaction device.

The secondary wax separation unit may further include a second plate provided inside the second chamber to face the second inlet pipe and folded.

The second inlet pipe and the third inlet pipe are disposed to face each other on one side wall and the other side wall of the second chamber, respectively, and a large amount of wax is added to the pyrolysis gas flowing into the second chamber through the second inlet pipe. When contained, the second plate may be arranged vertically in the height direction between the second inflow pipe and the third inflow pipe to prevent pyrolysis gas from flowing directly into the third inlet pipe.

The second plate may be folded vertically or horizontally by rotating both ends about the center depending on the amount of wax contained in the pyrolysis gas flowing into the second chamber through the second inlet pipe.

The inner upper side of the second chamber is formed to have a cross-sectional area that decreases toward the top, and the inner lower side of the second chamber is formed to have a cross-sectional area that decreases toward the downward side, and the second discharge pipe and the second transfer pipe are formed as the second discharge pipe and the second transfer pipe. They are disposed opposite to each other at the upper and lower portions of the chamber, and the second plate may be disposed between the second discharge pipe and the second transfer pipe.

a second cooler installed in the second transfer pipe and adjacent to the second storage tank to cool the pyrolysis gas transferred to the second storage tank along the second transfer pipe; and a second transfer pipe installed in the second transfer pipe and adjacent to the second chamber, and blocking the second transfer pipe when the pyrolysis oil condensed and stored in the second storage tank is of low quality and contains foreign substances and wax. It further includes two valves, and low-quality pyrolysis oil condensed and stored in the second storage tank can be returned to the first pyrolysis reaction device.

a first jacket unit that surrounds the first transfer pipe and is provided long along the longitudinal direction of the first transfer pipe to cool the pyrolysis gas transferred along the first transfer pipe; a second jacket unit that surrounds the second transfer pipe and is provided long along the longitudinal direction of the second transfer pipe to cool the pyrolysis gas transferred along the second transfer pipe; And it may further include a third jacket portion surrounding the third transfer pipe, provided long along the longitudinal direction of the third transfer pipe, and cooling the pyrolysis gas transferred along the third transfer pipe.

The inner upper side of the third chamber is formed to have a cross-sectional area that decreases toward the top, the inner lower side of the third chamber is formed to have a cross-sectional area that decreases toward the downward side, and the third discharge pipe and the third transfer pipe are formed as the third chamber. They may be disposed opposite to each other at the top and bottom of the chamber, respectively.

A third cooler installed in the third transfer pipe and adjacent to the third storage tank to cool the pyrolysis gas transferred to the third storage tank along the third transfer pipe; And a third valve installed in the third transfer pipe and adjacent to the third chamber, and blocking the third transfer pipe when the pyrolysis oil condensed and stored in the third storage tank is of low quality. You can.

Embodiments of the present invention can easily remove wax contained in pyrolysis gas generated in a pyrolysis reaction device.

In addition, the embodiment of the present invention can easily remove high boiling point wax and can be operated continuously, thereby ensuring high economic efficiency.

Additionally, in an embodiment of the present invention, high-boiling point wax can be returned to the pyrolysis reaction device to obtain high-quality pyrolysis oil.

1 is a configuration diagram schematically showing a pyrolysis oil production system according to the present invention.

Figure 2 is a diagram showing the operating state of the pyrolysis oil production system according to the present invention.

Figure 3 is an enlarged view of portion A of Figure 2, showing the first to third wax separators according to the present invention.

Figure 4 is an example of a first wax separator according to the present invention.

Figures 5a and 5b are another embodiment of the first wax separator according to the present invention.

Figure 6 is an operation state diagram showing the flow of pyrolysis gas in a closed state of the first valve according to the present invention.

Figure 7 is an enlarged view of portion B of Figure 6, showing the first to third wax separators according to the present invention.

Figure 8 is an example of a secondary wax separator according to the present invention.

Figures 9a and 9b show another embodiment of the secondary wax separator according to the present invention.

In order to fully understand the present invention, its operational advantages, and the objectives achieved by practicing 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 explaining preferred embodiments of the present invention with reference to the accompanying drawings. The same reference numerals in each drawing indicate the same member.

Figure 1 is a configuration diagram schematically showing the pyrolysis oil production system according to the present invention, Figure 2 is an operating state diagram of the pyrolysis oil production system according to the present invention, and Figure 3 is an enlarged view of portion A of Figure 2, according to the present invention. It is an enlarged view showing the first to third wax separators according to the present invention, Figure 4 is an example of the first wax separator according to the present invention, and Figures 5a and 5b are other examples of the first wax separator according to the present invention. This is an example, and Figure 6 is an operating state diagram showing the flow of pyrolysis gas in a closed state of the first valve according to the present invention, and Figure 7 is an enlarged view of portion B of Figure 6, where the first to third valves according to the present invention are This is an enlarged view showing a car wax separator. Figure 8 is an example of a secondary wax separator according to the present invention, and Figures 9a and 9b are another example of a secondary wax separator according to the present invention.

Referring to FIGS. 1 to 9B, the pyrolysis oil production system 100 according to the present invention includes a first pyrolysis reaction device 110 and a second pyrolysis reaction device disposed adjacent to the first pyrolysis reaction device 110. A wax separation device 130 disposed between the reaction device 120, the first pyrolysis reaction device 110 and the second pyrolysis reaction device 120, and the wax and residues are separated by the wax separation device 130. It includes storage tanks (185, 186, 187) where the separated pyrolysis gas is condensed and stored.

The first pyrolysis reaction device 110 applies heat to combustible waste to melt and decompose it. The first pyrolysis reaction device 110 pyrolyzes combustible waste at a high temperature (T1), so high-temperature (T1) pyrolysis gas and foreign solid residues are generated.

The second thermal decomposition reaction device 120 performs a thermal decomposition reaction at a thermal decomposition temperature (T2) that is higher than the thermal decomposition temperature (T1) of the first thermal decomposition reaction device (110).

Foreign substances to be pyrolyzed again in the first pyrolysis reaction device 110 and/or the second pyrolysis reaction device 120 may include high boiling point wax separated from the pyrolysis gas in the wax separation device 130.

In this embodiment, combustible waste includes waste synthetic resins such as waste plastic, waste rubber, and waste vinyl, and biomass. In particular, waste synthetic resin and biomass may be low-grade waste containing trace amounts of soil and inorganic substances such as aluminum coatings. In this embodiment, the combustible waste may contain 20 parts by weight or more of biomass.

In this embodiment, wax is a high boiling point material generated under reaction, transport, and/or storage conditions, and is a general term for carbon-based compounds that can easily exist in a solid state. When producing pyrolysis oil from combustible waste, the boiling point standard of the high boiling point wax to be separated and removed may vary depending on the production process conditions of the pyrolysis oil and the conditions of its use.

The thermal decomposition temperature (T1) of the first thermal decomposition reactor 110 may be 350 to 550°C, preferably 400 to 550°C, and more preferably 500 to 550°C, but is not limited thereto. No. The thermal decomposition temperature (T2) of the secondary thermal decomposition reactor 120 may be 400 to 650°C, preferably 450 to 650°C, and more preferably 500 to 650°C, but is not limited thereto. No.

Combustible waste is mainly waste vinyl or waste plastic, which generally undergoes thermal decomposition starting at 350°C. PE, which thermally decomposes relatively slowly and produces a lot of wax, thermally decomposes easily at a higher temperature.

In this embodiment, the first pyrolysis reaction device 110 may be a rotary kiln type pyrolysis reaction device, but is not limited thereto.

The rotary kiln-type pyrolysis reaction device applies heat throughout the furnace as it rotates, melting the internal combustible waste at high temperatures and causing it to decompose into pyrolysis gas and carbonized residue. The rotary kiln-type pyrolysis reaction device may proceed with the process of inputting combustible waste, performing pyrolysis, and discharging after pyrolysis is sufficiently achieved for pyrolysis efficiency. In addition, since decomposition occurs under high heat under oxygen-free conditions, the generation of dioxin generated during the incineration process in which oxygen is injected can be suppressed.

The rotary kiln-type pyrolysis reaction device can be operated with continuous pyrolysis while continuously injecting raw materials if the raw material inlet is stably blocked from oxygen and leakage is suppressed. However, in some cases, the rotary kiln-type pyrolysis reaction device is used during pyrolysis. Since the inflow of combustible waste is stopped, although not shown, a plurality of rotary kiln-type pyrolysis reactors can be connected in parallel to provide continuity of work. For example, while pyrolysis gas is supplied from the first rotary kiln-type pyrolysis reaction device to the wax separation device 130, which will be described later, combustible waste is introduced into the first rotary kiln-type pyrolysis reaction device, and the second rotary kiln-type pyrolysis reaction device Each unit can be operated in turn to carry out the pyrolysis process in the pyrolysis reactor.

The pyrolysis method of combustible waste using a rotary kiln-type pyrolysis reactor may be performed continuously or semi-continuously. Pyrolysis performed only continuously has the problem of stopping the entire process if a problem occurs in the equipment during pyrolysis, and pyrolysis performed only semi-continuously generates too much residue and reduces throughput due to irregular operation. There is a problem with the high intensity of work.

The rotary kiln-type pyrolysis reaction device may have an internal structure that allows sufficient contact time so that combustible waste, which is an input raw material, is sufficiently pyrolyzed and discharged separately into pyrolysis gas and solid residue in the form of inorganic substances.

Meanwhile, the secondary pyrolysis reaction device 120 may be a device in which a pyrolysis reaction occurs smoothly at a high temperature (T2 > T1) by simply heating to have a temperature gradient, and its internal structure includes a screw-type transfer device for transferring residues. The reactor type is more preferable, but is not limited thereto.

Foreign substances including wax and solid residues supplied from the wax separation device 130 are supplied to the second pyrolysis reactor 120, which has a transfer screw installed therein, and are thermally decomposed in the first pyrolysis reactor 110. The thermal decomposition reaction occurs at a temperature (T2) higher than the temperature (T1).

The pyrolysis gas generated in the second pyrolysis reaction device 120 is transferred to the wax separation device 130, which will be described later, like the pyrolysis gas generated in the first pyrolysis reaction device 110, and is connected to the

storage tanks

171, 172, and 173. can be collected and stored.

The heating heat source of the first pyrolysis reaction device 110 and the second pyrolysis reaction device 120 is combustible waste using self-produced pyrolysis gas and pyrolysis gas supplied from the pyrolysis gas storage tank 177 where the pyrolysis gas is stored. Energy costs for oil conversion can be reduced. The pyrolysis gas storage tank 177 is connected in communication with the first to

third storage tanks

171, 172, and 173, which will be described later, and the pyrolysis gas generated in the first to

third storage tanks

171, 172, and 173 is collected and stored.

Pyrolysis gas has a fairly high calorific value and can play a role in increasing thermal power. For example, it can be used to increase the heating temperature by supplying it as a heating means for a rotary kiln-type pyrolysis reaction device or as a heat source for another process. Therefore, the pyrolysis gas generated from the first pyrolysis reaction device 110, the second pyrolysis reaction device 120, and the first to

third storage tanks

171, 172, and 173 is not released into the atmosphere, which causes environmental problems, but is flammable. It can be reused as a heat source for pyrolysis of waste.

Meanwhile, in particular, the pyrolysis gas generated in the first pyrolysis reaction device 110 is composed of substances with various carbon numbers, and among them, wax, which is a high boiling point substance, has low utilization due to equipment clogging, etc., so it is separated and used again for primary pyrolysis. A process structure for thermal decomposition in the reaction device 110 is required. Accordingly, the pyrolysis oil production system 100 according to the present invention includes a wax separation device 130 for separating foreign substances such as wax and residues contained in the pyrolysis gas generated in the first pyrolysis reaction device 110. .

The wax separation device 130 separates foreign substances such as high boiling point wax components and residues from the pyrolysis gas, and the separated foreign substances such as high boiling point wax components and residues are subjected to secondary pyrolysis installed at the lower part of the wax separation device 130. Let it fall into the reaction device (120).

In this embodiment, the wax separation device 130 includes a first wax separator 140, a second wax separator 150, and a third wax separator 140 to sufficiently remove foreign substances such as wax components and residues contained in the pyrolysis gas. Car wax separators 160 are installed in parallel to prevent high-viscosity wax and foreign substances from being included in the final product of pyrolysis oil in which the pyrolysis gas is cooled.

Referring to Figures 1 and 2, the wax separation device 130 is a first wax separator connected to the first pyrolysis reaction device 110, the second pyrolysis reaction device 120, and the first storage tank 171. (140), the first wax separator 140, the second pyrolysis reaction device 120, and the second wax separator 150 connected to the second storage tank 172, and the second wax separator 150 ) and a third wax separator 160 connected to the second pyrolysis reaction device 120 and the third storage tank 173.

As shown in Figures 1 to 3, specifically, the first wax separator 140 has a first chamber 141, one end is connected to the first pyrolysis reaction device 110, and the other end is connected to the first chamber ( A first inlet pipe 142 connected to the side wall of 141), a first discharge pipe 143 with one end connected to the lower part of the first chamber 141 and the other end connected to the second pyrolysis reaction device 120, and one end A first transfer pipe 144 connected to the upper part of the first chamber 141 and the other end connected to the first storage tank 171, and a first inlet pipe 142 inside the first chamber 141 It includes a first plate 146 that is provided and folded.

The secondary wax separator 150 includes a second chamber 151, a second inlet pipe 152 with one end connected to the side wall of the first chamber 141 and the other end connected to the side wall of the second chamber 151, and , a second discharge pipe 153 with one end connected to the lower part of the second chamber 151 and the other end connected to the secondary pyrolysis reaction device 120, and one end connected to the upper part of the second chamber 151 and the other end It includes a second transfer pipe 154 connected to the second storage tank 172. Additionally, the second wax separator 150 may further include a second plate 156 that is provided inside the second chamber 151 to face the second inlet pipe 152 and is folded.

The third wax separator 160 includes a third chamber 161, a third inlet pipe 162 with one end connected to the side wall of the second chamber 151 and the other end connected to the side wall of the third chamber 161, and , a third discharge pipe 163 with one end connected to the lower part of the third chamber 161 and the other end connected to the second pyrolysis reaction device 120, and one end connected to the upper part of the third chamber 161 and the other end It includes a third transfer pipe 164 connected to the third storage tank 173.

With reference to FIGS. 2 to 5B, the first wax separator 140 will be described as follows.

The first chamber 141 is formed in a hollow shape, and the inner upper side is formed to have a cross-sectional area that decreases toward the top, and the inner lower side is formed to have a cross-sectional area that decreases toward the bottom.

The first chamber 141 receives pyrolysis gas containing foreign substances such as wax components and residues from the first pyrolysis reaction device 110, and performs pyrolysis in which foreign substances such as wax components and residues are separated and/or removed. The gas is moved to the first storage tank 171 or the adjacent second chamber 151, and foreign substances such as wax components and residues fall into the secondary pyrolysis reaction device 120 provided below.

For this purpose, the first wax separator 140 has a first inlet pipe 142 installed on one side wall of the first chamber 141 to communicate with the first pyrolysis reaction device 110. The first inlet pipe 142 has one end connected to the first pyrolysis reaction device 110 and the other end connected to one side wall of the first chamber 141.

And on the other side wall of the first chamber 141, there is a second inflow connected to the second chamber 151 so that the pyrolysis gas flowing into the first chamber 141 can be moved to the second chamber 151. A pipe 152 is installed. The second inlet pipe 152 has one end connected to the other side wall of the first chamber 141 and the other end connected to one side wall of the second chamber 151. And, the first inflow pipe 142 and the second inflow pipe 152 are disposed to face each other.

On the other hand, when the pyrolysis gas flowing into the first chamber 141 through the first inlet pipe 142 from the first pyrolysis reaction device 110 contains a large amount of foreign substances such as wax components and residues, In order to prevent the pyrolysis gas flowing into the first chamber 141 from the first inlet pipe 142 from directly flowing into the second chamber 151 through the second inlet pipe 152, the first plate (146) is disposed vertically in the height direction between the first inlet pipe 142 and the second inlet pipe 152 so that the pyrolysis gas flows directly from the first inlet pipe 142 to the second inlet pipe 152. can be blocked (see Figure 4).

Therefore, when the pyrolysis gas flowing into the first chamber 141 from the first inlet pipe 142 collides with the first plate 146, foreign substances such as wax components and residues contained in the pyrolysis gas are separated and the first It flows down the inner lower wall of the chamber 141 and can be moved to the second pyrolysis reactor 120 along the first outlet (see FIGS. 2 and 3). In addition, among the pyrolysis gases introduced into the first chamber 141, the pyrolysis gas with a high molecular weight expands and condenses, falls downward, and can be discharged to the second pyrolysis reaction device 120 through the first discharge pipe 143. .

Meanwhile, the first discharge pipe 143 and the first transfer pipe 144 are disposed opposite to each other at the upper and lower portions of the first chamber 141, respectively, and the first plate 146 is connected to the first discharge pipe 143 and the first transfer pipe 144. 1 It can be placed between the transfer pipes 144.

Some of the pyrolysis gas that flows into the first chamber 141 through the first inlet pipe 142 and collides with the first plate 146, for example, light high boiling point oil components, is in the first chamber 141. It is transferred along the first transfer pipe 144 installed at the top, condensed, cooled, and transferred to the first storage tank 171 (see Figure 2). Heavy oil, which is a high boiling point oil, etc. may be stored in the first storage tank 171.

One end of the first transfer pipe 144 is connected to the upper part of the first chamber 141 and the other end is connected to the first storage tank 171. The pyrolysis gas transported through the first transfer pipe 144 may contain light high boiling point oil components and wax components.

Since the pyrolysis gas transported through the first transfer pipe 144 may contain wax components, etc., the first transfer pipe 144 is installed inclined downward so that the wax components contained in the pyrolysis gas easily flow downward.

Additionally, a first jacket portion 181 may be installed on the first transfer pipe 144 to cool the high-temperature pyrolysis gas transferred along the first transfer pipe 144. The first jacket portion 181 surrounds the first transfer pipe 144 and is provided long along the longitudinal direction of the first transfer pipe 144 to cool the pyrolysis gas transported along the first transfer pipe 144 (Figure 2).

The pyrolysis gas transported along the first transfer pipe 144 is cooled by the first jacket part 181, cooled and condensed by the first cooler 185, and then stored in the first storage tank 171. Here, the first cooler 185 is installed in the first transfer pipe 144 and disposed adjacent to the first storage tank 171. As described above, heavy oil, which is a high boiling point oil, may be stored in the first storage tank 171.

In addition, when the pyrolysis oil condensed and stored in the first storage tank 171 is of low quality, that is, contains a large amount of wax components, foreign matter residues, etc., it is installed in the first transfer pipe 144 and stored in the first chamber 141. The first transfer pipe 144 can be blocked by the first valve 145 disposed adjacently.

And when it is determined that the pyrolysis oil stored in the first storage tank 171 is of low quality, the first plate 146 in the first chamber 141 is connected to the first inlet pipe 142 as shown in FIGS. 3 and 4. It can be operated while placed vertically between and the second inlet pipe 152. The first plate 146 is placed vertically to improve the removal efficiency of foreign substances such as wax components and residues contained in the pyrolysis gas introduced into the first chamber 141.

In addition, depending on the amount of wax contained in the pyrolysis gas flowing into the first chamber 141 through the first inlet pipe 142, both ends of the first plate 146 are rotated about the center to change the vertical to horizontal range (0 It can be folded within °~180°). That is, when the pyrolysis gas flowing into the first chamber 141 through the first inlet pipe 142 contains a large amount of wax, the first plate 146 is unfolded 180° as shown in FIG. 4. It can be placed vertically. And when the amount of wax contained in the pyrolysis gas flowing into the first chamber 141 through the first inlet pipe 142 gradually decreases, both ends of the first plate 146 are moved to the center as shown in FIG. 5A. By rotating relative to , both ends of the first plate 146 can have a "<" shape with a predetermined angle. And when the pyrolysis gas flowing into the first chamber 141 through the first inlet pipe 142 contains a very small amount of wax component or does not contain wax component, the first plate (as shown in FIG. 5B) Both ends of the first plate 146 can be rotated about the center so that both ends of the first plate 146 are parallel to each other. In this way, both ends of the first plate 146 are folded within the range of 0° to 180° to increase and decrease the residence time during which the pyrolysis gas that collides with the first plate 146 stays for a certain period of time within the first chamber 141, thereby reducing its own weight. By allowing wax components and residues to fall, removal efficiency can be improved.

Meanwhile, as described above, when the pyrolysis oil condensed and stored in the first storage tank 171 is of low quality, that is, contains a large amount of wax components, residues, etc., the first transfer pipe 144 is connected to the first valve 145. After blocking, the pyrolysis oil stored in the first storage tank 171 can be returned to the first pyrolysis reaction device 110 through the return pipe 190. One end of the return pipe 190 is connected to the lower part of the first storage tank 171, and the other end is connected to the first pyrolysis reaction device 110. The first storage tank 171 may be formed in a cone shape so that the pyrolysis oil can be easily discharged downward from the first storage tank 171.

In addition, as shown in FIG. 6, when the pyrolysis gas flowing into the first chamber 141 from the first pyrolysis reaction device 110 contains a large amount of foreign substances such as wax components and residues, the first pyrolysis reaction device 110 With the first transfer pipe 144 blocked by the valve 145, the pyrolysis gas flowing into the first chamber 141 from the first pyrolysis reaction device 110 through the first inlet pipe 142 is the first pyrolysis gas. After a large amount of foreign substances such as wax components and residues are removed from the chamber 141, they are again introduced into the second chamber 151 through the second inlet pipe 152 to remove wax components and residues contained in the pyrolysis gas. Foreign substances may be removed and condensed and stored in the second storage tank 172 through the second transfer pipe 154. The second storage tank 172 may store medium boiling point oil such as diesel or diesel.

With reference to FIGS. 2, 3, 8, 9A, and 9B, the secondary wax separator 150 will be described as follows.

The pyrolysis gas flowing into the first chamber 141 through the first inlet pipe 142 from the first pyrolysis reaction device 110 collides with the first plate 146 and then foreign substances such as wax components and residues are removed. It is discharged to the second pyrolysis reaction device 120 through the first discharge pipe 143, and the light high boiling point oil component and trace amounts of wax components are discharged to the first storage tank 171 through the first transfer pipe 144. The pyrolysis gas containing foreign substances such as oil components, wax components, and residues flows into the second chamber 151 through the second inlet pipe 152.

The second chamber 151 is formed in a hollow shape, and the inner upper side is formed to have a cross-sectional area that decreases toward the top, and the inner lower side is formed to have a cross-sectional area that decreases toward the bottom.

The pyrolysis gas from which foreign substances such as wax components and residues have been removed in the first chamber 141 is moved to the first storage tank 171 or the adjacent second chamber 151, and the wax is removed from the first chamber 141. Foreign substances such as components and residues fall into the secondary pyrolysis reaction device 120 provided on the lower side.

The second wax separator 150 is installed on one side wall of the second chamber 151 to communicate with the first chamber 141 so that the pyrolysis gas that has passed through the first chamber 141 flows into the second chamber 151. A second inlet pipe 152 is installed. The second inlet pipe 152 has one end connected to the other side wall of the first chamber 141 and the other end connected to one side wall of the second chamber 151.

On the other side wall of the second chamber 151, there is a third inlet pipe connected in communication with the third chamber 161 so that the pyrolysis gas flowing into the second chamber 151 can be moved to the third chamber 161. (162) is installed. The third inlet pipe 162 has one end connected to the other side wall of the second chamber 151 and the other end connected to the side wall of the third chamber 161. And, the second inflow pipe 152 and the third inflow pipe 162 are disposed to face each other.

On the other hand, if the pyrolysis gas that flows into the second chamber 151 through the second inlet pipe 152 after staying in the first chamber 141 contains foreign substances such as wax components and residues, 2 In order to prevent the pyrolysis gas flowing into the chamber 151 from directly flowing into the third chamber 161 through the third inlet pipe 162, the second plate 156 is connected to the second inlet pipe 152. and the third inlet pipe 162 are disposed vertically in the height direction to block pyrolysis gas from flowing from the second inlet pipe 152 to the third inflow pipe 162 (see FIG. 8).

Therefore, when the pyrolysis gas flowing into the second chamber 151 from the second inlet pipe 152 collides with the second plate 156, foreign substances such as wax components and residues contained in the pyrolysis gas are separated and the second It flows down the inner lower wall of the chamber 151 and can be moved to the secondary pyrolysis reactor 120 along the second outlet (see FIGS. 2 and 3). In addition, the pyrolysis gas with a large molecular weight among the pyrolysis gases introduced into the second chamber 151 expands again and condenses, falls downward, and can be discharged to the secondary pyrolysis reaction device 120 through the second discharge pipe 153. there is.

Meanwhile, the second discharge pipe 153 and the second transfer pipe 154 are disposed opposite to each other at the upper and lower portions of the second chamber 151, respectively, and the second plate 156 is connected to the second discharge pipe 153 and the second transfer pipe 154. It can be placed between two transfer pipes (154).

Some of the pyrolysis gas that flows into the second chamber 151 through the second inlet pipe 152 and collides with the second plate 156, for example, light medium boiling point oil components, is in the second chamber 151. It is transferred along the second transfer pipe 154 installed at the top, condensed, cooled, and transferred to the second storage tank 172 (see Figure 2).

One end of the second transfer pipe 154 is connected to the upper part of the second chamber 151 and the other end is connected to the second storage tank 172. The pyrolysis gas transported through the second transfer pipe 154 may contain light and medium boiling point oil components. Since the wax components contained in the pyrolysis gas are first removed in the first chamber 141 and then again in the second chamber 151, the pyrolysis gas transported through the second transfer pipe 154 contains wax components, It can be transferred to the second storage tank 172 with most of the residue removed, so high-quality pyrolysis oil can be obtained.

Meanwhile, in preparation for the case where the pyrolysis gas transported through the second transfer pipe 154 contains a trace amount of wax components, etc., a second transfer pipe ( 154) is installed slanted downward.

A second jacket portion 182 may be installed in the second transfer pipe 154 to cool the high-temperature pyrolysis gas transported along the second transfer pipe 154. The second jacket portion 182 surrounds the second transfer pipe 154 and is provided long along the longitudinal direction of the second transfer pipe 154 to cool the pyrolysis gas transported along the second transfer pipe 154 (Figure 2).

The pyrolysis gas transported along the second transfer pipe 154 is cooled by the second jacket part 182, cooled and condensed by the second cooler 186, and then stored in the second storage tank 172. Here, the second cooler 186 is installed in the second transfer pipe 154 and disposed adjacent to the second storage tank 172. As described above, kerosene, etc. may be stored in the second storage tank 172 if it is a medium boiling point oil.

In addition, if the pyrolysis oil condensed and stored in the second storage tank 172 is of low quality, that is, contains wax components, foreign matter residues, etc. more than a set amount, it is installed in the second transfer pipe 154 and placed in the second chamber ( The second transfer pipe 154 can be blocked by the second valve 155 disposed adjacent to 151).

And when it is determined that the pyrolysis oil stored in the second storage tank 172 is of low quality, the second plate 156 in the second chamber 151 is connected to the second inlet pipe 152 as shown in FIGS. 3 and 8. ) and the third inlet pipe 162 can be operated in a vertical position. The second plate 156 is placed vertically to further improve the removal efficiency of foreign substances such as wax components and residues contained in the pyrolysis gas introduced into the second chamber 151.

In addition, depending on the amount of wax contained in the pyrolysis gas flowing into the second chamber 151 through the second inlet pipe 152, both ends of the second plate 156 are rotated about the center to change the vertical to horizontal range (0 It can be folded within °~180°). That is, when the pyrolysis gas flowing into the second chamber 151 through the second inlet pipe 152 contains more than a set amount of wax components, the second plate 156 is rotated 180° as shown in FIG. 8. It can be placed vertically in an unfolded state. And when the amount of wax contained in the pyrolysis gas flowing into the second chamber 151 through the second inlet pipe 152 gradually decreases, both ends of the second plate 156 are moved to the center as shown in FIG. 9A. By rotating relative to , both ends of the second plate 156 can have a "<" shape with a predetermined angle. And when the pyrolysis gas flowing into the second chamber 151 through the second inlet pipe 152 contains a very small amount of wax component or does not contain wax component, the second plate (as shown in FIG. 9B) Both ends of the second plate 156 can be rotated about the center so that both ends of the second plate 156 are parallel to each other. In this way, both ends of the second plate 156 are folded within the range of 0° to 180° to increase and decrease the residence time during which the pyrolysis gas that collides with the second plate 156 stays within the second chamber 151 for a certain period of time, thereby increasing the self-weight. By allowing wax components and residues to fall, the removal efficiency can be further improved.

Meanwhile, if the pyrolysis oil condensed and stored in the second storage tank 172 is of low quality, that is, contains wax components, residues, etc. more than a set amount, the second transfer pipe 154 is blocked by the second valve 155. After that, the pyrolysis oil stored in the second storage tank 172 can be returned to the first pyrolysis reaction device 110 through the return pipe 190. One end of the return pipe 190 is connected to the lower part of the second storage tank 172, and the other end is connected to the first pyrolysis reaction device 110. The second storage tank 172 may be formed in a cone shape so that the pyrolysis oil can be easily discharged downward from the second storage tank 172.

Meanwhile, as described above, after blocking the first transfer pipe 144 with the first valve 145, foreign substances such as wax components and residues contained in the pyrolysis gas flowing from the first pyrolysis reaction device 110 are removed. The separation and removal operation is as follows.

As shown in FIGS. 6 and 7, with the first transfer pipe 144 blocked by the first valve 145, the first pyrolysis reaction device 110 flows through the first inlet pipe 142. 1 Foreign substances such as a large amount of wax components and residues contained in the pyrolysis gas flowing into the chamber 141 can be removed by the first plate 146 arranged vertically, and the second inlet pipe 152 After flowing into the second chamber 151, foreign substances such as wax components and residues contained in the pyrolysis gas can be removed again by the vertically arranged second plate 156. Meanwhile, if a large amount of foreign substances such as wax components and residues have been removed by the first plate 146, the second plate 156 may be arranged to be folded as shown in FIGS. 9A and 9B.

As described above, foreign substances such as wax components and residues contained in the pyrolysis gas are removed by the first wax separator 140 and the second wax separator 150 and then transferred through the second transfer pipe 154. Afterwards, it can be condensed and stored in the second storage tank 172. In addition, the pyrolysis gas that has passed through the second chamber 151 passes through the third chamber 161 through the third inlet pipe 162, and foreign substances such as trace amounts of wax components and residues can be further removed.

With reference to FIGS. 2 and 6, the tertiary wax separator 160 is described as follows.

Foreign substances such as wax components and residues contained in the pyrolysis gas that passed through the first chamber 141 and the second chamber 151 in the first pyrolysis reaction device 110 are stored in the first chamber 141 and the second chamber 151. It is removed through (151) and discharged to the second pyrolysis reaction device (120), and is transferred to the first storage tank (171) and the second storage tank through the first transfer pipe (144) and the second transfer pipe (154). It is stored in (172). In addition, some of the pyrolysis gas that has passed through the first chamber 141 and the second chamber 151 flows into the third chamber 161 through the third inlet pipe 162, and among the pyrolysis gases, the pyrolysis gas with a large molecular weight is As it expands and condenses, it falls downward and is discharged into the secondary pyrolysis reaction device 120. In addition, foreign substances such as wax components and residues contained in the pyrolysis gas stay in the third chamber 161 for a certain period of time and fall due to their own weight, thereby further improving the removal efficiency. there is. And the removed foreign substances such as wax components and residues can be discharged to the second pyrolysis reaction device 120 through the third discharge pipe 163.

The third chamber 161 is formed in a hollow shape, and the inner upper side is formed to have a cross-sectional area that decreases as it moves upward, and the inner lower side is formed to have a cross-sectional area that decreases as it goes downward.

The pyrolysis gas from which foreign substances such as wax components and residues have been removed in the second chamber 151 is moved to the second storage tank 172 or the adjacent third chamber 161, and the wax is removed from the third chamber 161. Foreign substances such as components and residues fall into the secondary pyrolysis reaction device 120 provided on the lower side.

The third wax separator 160 is installed on the side wall of the third chamber 161 to communicate with the second chamber 151 so that the pyrolysis gas that has passed through the second chamber 151 flows into the third chamber 161. 3 An inlet pipe 162 is installed. The third inlet pipe 162 has one end connected to the other side wall of the second chamber 151 and the other end connected to the side wall of the third chamber 161.

Since wax components contained in the pyrolysis gas are first removed in the first chamber 141 and then removed secondarily in the second chamber 151, a very small amount of wax is contained in the pyrolysis gas flowing into the third chamber 161. Only ingredients and residues may be contained.

Even if the pyrolysis gas flowing into the third chamber 161 through the third inlet pipe 162 contains a very small amount of foreign substances such as wax components and residues, it expands, condenses, and falls within the third chamber 161. A very small amount of foreign substances such as wax components and residues are also removed, so that no wax components remain in the high-temperature pyrolysis gas transported along the third transfer pipe 164. The pyrolysis gas transported along the third transfer pipe 164 is cooled by the third jacket unit 183 installed in the third transfer pipe 164. The third jacket portion 183 surrounds the third transfer pipe 164 and is provided long along the longitudinal direction of the third transfer pipe 164 to cool the pyrolysis gas transported along the third transfer pipe 164.

The pyrolysis gas transported along the third transfer pipe 164 is cooled by the third jacket portion 183, cooled and condensed by the third cooler 187, and then stored in the third storage tank 173. Here, the third cooler 187 is installed in the third transfer pipe 164 and disposed adjacent to the third storage tank 173. Gasoline, a low boiling point oil, etc. may be stored in the third storage tank 173.

The pyrolysis oil production system 100 according to the present invention returns the high boiling point oil containing wax components stored in the first storage tank 171, which is generated by pyrolyzing combustible waste, to the first pyrolysis reaction device 110. , medium boiling point oil such as diesel and diesel stored in the second storage tank 172 and low boiling point oil such as gasoline stored in the third storage tank 173 can be transferred to the integrated storage tank 175 and stored.

Meanwhile, among the pyrolysis gases flowing into the first wax separator 140, the second wax separator 150, and the third wax separator 160 according to this embodiment, the pyrolysis gas with a large molecular weight expands and condenses. It falls downward and is discharged into the secondary pyrolysis reaction device 120. And the pyrolysis gas generated in the second pyrolysis reaction device 120 is returned to the first chamber 141 and the second chamber ( 151) and may be re-introduced into the third chamber 1651.

As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations should be considered to fall within the scope of the claims of the present invention.

[Explanation of symbols]

100: Pyrolysis oil production system 110: First pyrolysis reaction device

120: Secondary pyrolysis reaction device 130: Wax separation device

140: first wax separator 141: first chamber

142: first inlet pipe 143: first discharge pipe

144: first transfer pipe 145: first valve

146: first plate 150: second wax separator

151: second chamber 152: second inlet pipe

153: second discharge pipe 154: second transfer pipe

155: second valve 156: second plate

160: Third wax separator 161: Third chamber

162: third inlet pipe 163: third discharge pipe

164: third transfer pipe 165: third valve

171: first storage tank 172: second storage tank

173: Third storage tank 175: Integrated storage tank

177: Pyrolysis gas storage tank 181: First jacket portion

182: second jacket portion 183: third jacket portion

185: first cooler 186: second cooler

187: third cooler 190: return pipe

The pyrolysis oil production system according to the present invention can easily separate and remove wax contained in pyrolysis gas generated from the pyrolysis reaction device.

Claims

Primary pyrolysis reaction device;

a second pyrolysis reaction device having a higher pyrolysis temperature than the first pyrolysis reaction device;

A first chamber, a first inlet pipe whose end is connected to the first pyrolysis reaction device and whose other end is connected to a side wall of the first chamber, and whose end is connected to the lower part of the first chamber and whose other end is connected to the secondary pyrolysis reaction device. A first discharge pipe connected to the pyrolysis reaction device, a first transfer pipe with one end connected to the upper part of the first chamber and the other end connected to the first storage tank, and a first discharge pipe connected to the first storage tank, and opposite to the first inlet pipe inside the first chamber. A first wax separator having a first plate that is prepared and folded;

A second chamber, a second inlet pipe with one end connected to the side wall of the first chamber and the other end connected to the side wall of the second chamber, one end connected to the lower part of the second chamber and the other end connected to the secondary pyrolysis A secondary wax separator having a second discharge pipe connected to the reaction device and a second transfer pipe whose end is connected to the upper part of the second chamber and the other end is connected to the second storage tank; and

A third chamber, a third inlet pipe with one end connected to the side wall of the second chamber and the other end connected to the side wall of the third chamber, and one end connected to the lower part of the third chamber and the other end connected to the secondary pyrolysis A pyrolysis oil production system comprising a third discharge pipe connected to a reaction device and a third wax separator having one end connected to the upper part of the third chamber and the other end connected to a third storage tank.
According to paragraph 1,

The first inflow pipe and the second inflow pipe are disposed opposite to each other on one side wall and the other side wall of the first chamber, respectively,

When the pyrolysis gas flowing into the first chamber through the first inlet pipe contains a large amount of wax, the first plate is configured to prevent the pyrolysis gas from flowing directly into the second inlet pipe. A pyrolysis oil production system arranged vertically in the height direction between the pipe and the second inlet pipe.
According to paragraph 2,

The first plate is a pyrolysis oil production system in which both ends are rotated about the center and folded within a vertical or horizontal range depending on the amount of wax contained in the pyrolysis gas flowing into the first chamber through the first inlet pipe.
According to paragraph 2,

The inner upper side of the first chamber is formed so that the cross-sectional area decreases upward,

The inner lower side of the first chamber is formed so that the cross-sectional area decreases downward,

The first discharge pipe and the first transfer pipe are disposed opposite to each other at the upper and lower portions of the first chamber, respectively,

The first plate is a pyrolysis oil production system disposed between the first discharge pipe and the first transfer pipe.
According to paragraph 1,

a first cooler installed in the first transfer pipe and disposed adjacent to the first storage tank to cool the pyrolysis gas transferred to the first storage tank along the first transfer pipe; and

A first transport pipe is installed in the first transfer pipe and adjacent to the first chamber, and blocks the first transfer pipe when the pyrolysis oil condensed and stored in the first storage tank is of low quality and contains foreign substances and wax. Further comprising a valve,

A pyrolysis oil production system in which low-quality pyrolysis oil condensed and stored in the first storage tank is returned to the first pyrolysis reaction device.
According to paragraph 1,

The second wax separation unit,

The pyrolysis oil production system further includes a second plate provided inside the second chamber to face the second inlet pipe and folded.
According to clause 6,

The second inflow pipe and the third inflow pipe are disposed opposite to each other on one side wall and the other side wall of the second chamber, respectively,

When the pyrolysis gas flowing into the second chamber through the second inlet pipe contains a large amount of wax, the second plate is configured to prevent the pyrolysis gas from flowing directly into the third inlet pipe. A pyrolysis oil production system arranged vertically in the height direction between the pipe and the third inlet pipe.
In clause 7,

The second plate is a pyrolysis oil production system in which both ends are rotated about the center and folded within a vertical or horizontal range depending on the amount of wax contained in the pyrolysis gas flowing into the second chamber through the second inlet pipe.
In clause 7,

The inner upper side of the second chamber is formed so that the cross-sectional area decreases upward,

The inner lower side of the second chamber is formed so that the cross-sectional area decreases downward,

The second discharge pipe and the second transfer pipe are disposed opposite to each other at the upper and lower portions of the second chamber, respectively,

The second plate is a pyrolysis oil production system disposed between the second discharge pipe and the second transfer pipe.
According to paragraph 1,

a second cooler installed in the second transfer pipe and adjacent to the second storage tank to cool the pyrolysis gas transferred to the second storage tank along the second transfer pipe; and

A second transport pipe is installed in the second transfer pipe and adjacent to the second chamber, and blocks the second transfer pipe when the pyrolysis oil condensed and stored in the second storage tank is of low quality and contains foreign substances and wax. Further comprising a valve,

A pyrolysis oil production system in which low-quality pyrolysis oil condensed and stored in the second storage tank is returned to the first pyrolysis reaction device.
According to paragraph 1,

a first jacket unit that surrounds the first transfer pipe and is provided long along the longitudinal direction of the first transfer pipe to cool the pyrolysis gas transferred along the first transfer pipe;

a second jacket unit that surrounds the second transfer pipe and is provided long along the longitudinal direction of the second transfer pipe to cool the pyrolysis gas transferred along the second transfer pipe; and

A pyrolysis oil production system that surrounds the third transfer pipe and further includes a third jacket part provided long along the longitudinal direction of the third transfer pipe to cool the pyrolysis gas transported along the third transfer pipe.
According to paragraph 1,

The inner upper side of the third chamber is formed so that the cross-sectional area decreases as it goes upward,

The inner lower side of the third chamber is formed so that the cross-sectional area decreases downward,

A pyrolysis oil production system in which the third discharge pipe and the third transfer pipe are disposed to face each other at the upper and lower portions of the third chamber, respectively.
According to paragraph 1,

A third cooler installed in the third transfer pipe and adjacent to the third storage tank to cool the pyrolysis gas transferred to the third storage tank along the third transfer pipe; and

The pyrolysis tank is installed in the third transfer pipe and adjacent to the third chamber, and further includes a third valve that blocks the third transfer pipe when the pyrolysis oil condensed and stored in the third storage tank is of low quality. Oil production system.