KR102674375B1 - Pyrolysis system for plastic wastes - Google Patents

Abstract

The present invention is suitable for intermittent operation in accordance with small-scale or each factory's own waste synthetic resin recycling system, and furthermore, even when the collected amount of waste synthetic resin is large, continuous operation can be performed while maintaining the thermal power of the burner. It relates to a waste synthetic resin pyrolysis system that can reduce fuel consumption and increase pyrolysis efficiency, comprising a gas combustion chamber whose interior is heated by the thermal power of a burner, and one side of which is in communication with the gas combustion chamber to receive the thermal power of the burner and receive the internal combustion chamber. A decomposition combustion chamber is heated and discharges the heated internal heat through a hot air outlet on the other side, and is installed in an upper part of the decomposition combustion chamber so as to be retractable and removable, and receives heat from the decomposition combustion chamber to thermally decompose the waste synthetic resin contained therein. a pyrolysis tank, a filtration and condensation unit that receives the pyrolyzed generated gas from the pyrolysis tank, filters it, and condenses it to produce recycled oil, naturally cools the pyrolysis tank heated by pyrolysis of the waste synthetic resin, and accommodates the waste synthetic resin. In order to wait for replacement of an extra pyrolysis tank, a tank holder on which each pyrolysis tank is mounted, the heated pyrolysis tank is taken out from the decomposition and combustion chamber and moved to the tank holder, and the extra pyrolysis tank is moved from the tank holder. It includes a crane that introduces the decomposition and combustion chamber into the decomposition and combustion chamber.

Description

Waste synthetic resin pyrolysis system {PYROLYSIS SYSTEM FOR PLASTIC WASTES}

The present invention relates to a waste synthetic resin pyrolysis system that recycles waste synthetic resin to produce recycled oil through pyrolysis of waste synthetic resin.

As industrialization accelerates and living standards improve, demand for energy and resources is increasing. Recently, as resource and energy shortages have worsened, waste has been approached from the perspective of a resource.

In particular, the use of plastics in Korea is rapidly increasing as lifestyles become westernized. Among them, Korea's thermoplastic resin production is approximately 10 million tons, ranking 5th in the world, and thermoplastic resins discharged as waste annually are approximately 4 million tons, which is a huge amount entering the environment. It is becoming.

50% of the above-mentioned thermoplastic resin waste is incinerated, 15% is landfilled, and the remaining 35% is recycled. Thermoplastic resins have a fast combustion rate, so if sufficient oxygen is not supplied, there is a high probability of incomplete combustion. In addition, PVC contained in mixed thermoplastic resin waste is known to be the cause of HCl and dioxin emissions during the incineration process.

Therefore, despite its advantages such as high calorific value, incineration of waste thermoplastic resin is not considered a desirable alternative due to management difficulties. On the other hand, due to the fatal disadvantage of landfill in that it does not utilize resources, landfill disposal of combustible waste is being banned worldwide, and Korea is also limiting the role of landfill to landfilling incineration ash and non-recyclable waste.

Generally, recycling is divided into material recycling and chemical recycling, but recently, energy recycling is also included as a new recycling category. The material recycling is a form of recycling that converts raw materials through injection after going through a melting process or produces products through a molding process. However, because the purity is low, it is impossible to reduce it to a single expensive raw material, and demand and preference are low due to problems such as the color of the product. Chemical recycling includes pyrolysis and gasification, of which pyrolysis has recently made significant technological progress, and the economic feasibility of pyrolysis is sufficiently secured as the price of oil continues to rise.

Thermal decomposition of waste synthetic resin is a process in which waste synthetic resin is thermally decomposed by externally supplied energy and converted into gaseous products, liquid products, and solid products. The gaseous product is mainly composed of CH ₄ , C ₂ H ₆ , C ₃ H ₈ and can be used as fuel gas, and the liquid product is a hydrocarbon compound with a carbon number of 15 or less and can be used as heavy oil or higher oil. In addition, the solid product is the main ingredient and can be used as an alternative fuel to coal, and can be used as a carbon source such as carbon black, activated carbon, and carbon nanotubes.

Thermal decomposition of waste synthetic resin can be divided into high-temperature and low-temperature reactions depending on the reaction temperature, and the type and amount of products produced vary depending on the reaction temperature. For example, the higher the temperature reaction, the higher the production rate of gaseous products, and the lower the production rate of liquid and solid products, and the opposite phenomenon is observed in low-temperature reactions. Among these, the main purpose of high-temperature pyrolysis with a reaction temperature of 600℃ or higher is to generate fuel gas, but it is inferior in fuel gas generation compared to gasification, so it is not widely used in the field.

Therefore, most waste synthetic resin pyrolysis devices currently operate at low temperatures below 600°C and are installed and operated for the purpose of generating fuel oil, that is, converting it into oil. In this way, low-temperature pyrolysis devices are advantageous for generating fuel oil, and thermoplastic resin is a material suitable for meeting this purpose.

The pyrolysis device for waste synthetic resin according to the prior art includes 'Simple pyrolysis device for waste synthetic resin' in Registered Utility Model Publication No. 20-0397138, 'Pyrolysis oil regeneration device for waste synthetic resin' in Registered Utility Model Publication No. 20-0299241, and Public Patent Publication No. 20-0299241. There is ‘waste synthetic resin pyrolysis device’ under No. 10-2008-0087607.

This conventional waste synthetic resin pyrolysis device is designed to continuously pyrolyze large quantities of materials and is not suitable for intermittent operation for small-scale use or for use as a recycling system for each factory's own waste synthetic resin. In particular, foreign matter, chlorine substances, sludge, etc. generated during thermal decomposition of waste synthetic resin, which has been a problem in the past, adheres to the inside of the device, causing a decrease in thermal efficiency, difficulty in management, and a cause of failure.

In order to solve the above problems, there is a 'waste synthetic resin pyrolysis device' of Patent Registration No. 10-1734033 as a technology developed by the present applicant as an inventor, and accordingly, small-scale or each factory's own waste synthetic resin recycling system is available. It is suitable for intermittent operation, and foreign substances and sludge generated during thermal decomposition of waste synthetic resin can be easily removed from inside the device.

In addition, the 'waste synthetic resin pyrolysis device' of Patent No. 10-2544280, applied and registered by the present applicant, efficiently removes wax components from the gas generated after thermal decomposition of waste synthetic resin in the pyrolysis tank before supplying it to the filter and condenser. By allowing separation and removal, it is possible to eliminate obstacles to process operation such as pipe blockage, improve the filter life of the filter, and produce high-quality recycled oil.

However, in the case of the waste synthetic resin pyrolysis device according to the prior art, despite the other effects described above, it is suitable for intermittent operation in accordance with the recycling system of small-scale or each factory's own waste synthetic resin, but it is suitable for use in cases where a rather large amount of waste synthetic resin is accumulated. There is a problem that it is not suitable for continuous operation.

In other words, even if the amount of waste synthetic resin collected is small even in a small factory, if it is pyrolyzed each time it is collected, excessive fuel consumption is a problem because the burner must be operated each time to increase thermal power. Therefore, if a rather large amount of collected waste synthetic resin is piled up, pyrolyze it once using a pyrolysis tank, cool the heat sufficiently to open the pyrolysis tank, discharge the remaining sludge, and then return the collected waste synthetic resin to the inside of the pyrolysis tank. Since it requires a process of adding , continuous thermal decomposition is impossible.

In this regard, in order to obtain the basic configuration and effects from the 'waste synthetic resin pyrolysis device' according to the above-described prior art developed by the present applicant as an inventor or applicant, a waste synthetic resin pyrolysis device that can continuously pyrolyze waste synthetic resin while utilizing a pyrolysis tank is used. I would like to propose a system.

The purpose of the present invention, which was conceived from the above viewpoint, is to be suitable for intermittent operation in accordance with small-scale or each factory's own waste synthetic resin recycling system, and furthermore, to maintain the thermal power of the burner even when the collected amount of waste synthetic resin is large. The goal is to provide a waste synthetic resin pyrolysis system that can operate continuously in one state, reduce fuel consumption, and increase pyrolysis efficiency.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings.

In order to achieve the above object, the waste synthetic resin pyrolysis system according to the present invention includes a gas combustion chamber whose interior is heated by the thermal power of a burner, and one side of which is in communication with the gas combustion chamber and receives the thermal power of the burner to heat the interior. , a decomposition combustion chamber that discharges heated internal heat through a heat outlet on the other side, and a pyrolysis tank that is retractable and installed at the top of the decomposition combustion chamber and receives heat from the decomposition combustion chamber to thermally decompose the waste synthetic resin contained therein. and a filtration and condensation unit that receives the pyrolyzed generated gas from the pyrolysis tank through a supply pipe, filters it, and condenses it to produce recycled oil, and the waste synthetic resin is pyrolyzed to naturally cool the heated pyrolysis tank, and the waste synthetic resin is pyrolyzed. In order to wait for replacement of the stored extra pyrolysis tank, a tank holder on which each pyrolysis tank is mounted, the heated pyrolysis tank is taken out from the decomposition and combustion chamber and moved to the tank holder, and the spare pyrolysis tank is placed from the tank holder. It includes a crane that moves it into the decomposition and combustion chamber.

In addition, the pyrolysis tank has a cylindrical shape with a hollow interior, is installed to be retractable and removable above the decomposition and combustion chamber so that the open upper part protrudes outward from the decomposition and combustion chamber, and is a tank frame in which the waste synthetic resin is accommodated. And, the lower part is flange coupled to the upper part of the tank frame so that it can be opened and closed, a gas discharge pipe is formed to protrude upward in the center of the upper surface to discharge the generated gas, and a plurality of hooks are formed along the circumference of the upper surface to lift and lower the crane. It includes a tank cover on which a wire is caught, a connection pipe at one end of which is connected in communication with the gas discharge pipe of the tank cover, the other end of which is detachably connected to the supply pipe, and an opening/closing valve for opening and closing the flow path is installed in the center. It is characterized by

In addition, the supply pipe includes a joint pipe installed on the flow path through which the generated gas is supplied so that the open end faces the other end of the connection pipe of the pyrolysis tank, one end is fixedly coupled to the open end of the joint pipe, and a central corrugated pipe. It is characterized in that it includes a bellows pipe that is elastically formed and the other end of which is detachably coupled to the connection pipe of the pyrolysis tank.

In addition, the bellows pipe further includes a horizontal maintaining bracket through which guide rods are inserted into the outer periphery of both ends facing each other in order to maintain the horizontal level when the corrugated pipe is expanded and contracted.

In addition, the tank holder includes a holder main body formed of a steel structure in the shape of a rectangular parallelepiped, each of which is in the shape of a square plate and is seated on the upper surface of the holder main body, and a tank insertion hole is formed through the center to allow the lower part of the pyrolysis tank to be inserted. , a mounting protrusion formed to protrude upward along the outer circumference of the tank insertion hole supports the lower surface of the flange of the pyrolysis tank and includes a plurality of mounting plates for respectively mounting the pyrolysis tank.

In addition, the tank holder is movably installed on one side of the holder main body, and the outer peripheral surface of the pyrolysis tank mounted on the holder plate is gripped with a gripper to move it to the outside or the pyrolysis tank is mounted on the holder plate from the outside. It is characterized in that it further includes a manipulator for mounting.

In addition, the gripper of the manipulator is a pair of bar-shaped tongs that operate to be close to or spaced apart from each other, and the surfaces facing each other grip the outer peripheral surface of the pyrolysis tank, and the upper ends of each support the lower surface of the flange of the pyrolysis tank to perform the pyrolysis. It is characterized by lifting and moving the tank.

In addition, the mounting protrusions of the mounting plate are formed in three or four cylindrical shapes with a length longer than the upper and lower length of the gripper so as not to interfere with the operation of the gripper, and are characterized in that they support the lower surface of the flange of the pyrolysis tank. do.

In addition, it is characterized in that it further includes a boiler that is in communication with the hot air outlet of the decomposition combustion chamber to recycle the heat of the waste gas, a cyclone scrubber and a spray tower that collect contaminants after cooling the waste gas recycled from the boiler.

The waste synthetic resin pyrolysis system according to the present invention is suitable for intermittent operation in accordance with small-scale or each factory's own waste synthetic resin recycling system, and furthermore, it maintains the thermal power of the burner even when the collected amount of waste synthetic resin is large. Since continuous operation can be performed, fuel consumption can be reduced and pyrolysis efficiency can be increased.

1 is a perspective view showing an embodiment of a waste synthetic resin pyrolysis system according to the present invention;
Figure 2 is a plan view of the embodiment of Figure 1;
Figure 3 is an enlarged plan view showing the combustion chamber, crane, and tank holder in the embodiment of Figure 2;
Figure 4 is an enlarged perspective view of the combustion chamber, pyrolysis tank, and crane in the embodiment of Figure 1;
Figures 5 and 6 are enlarged portions of part A of Figure 4 and are principal perspective views showing the detachment process between the connecting pipe and the joint pipe according to expansion and contraction of the bellows pipe;
Figures 7 and 8 are plan views of Figures 5 and 6;
Figure 9 is an enlarged side view of the crane and tank holder in the embodiment of Figure 1;
Figure 10 is an enlarged perspective view of the tank holder in the embodiment of Figure 1;
Figures 11 to 13 are partial perspective views showing the process of gripping and lifting the pyrolysis tank mounted on the mounting plate with the gripper of the manipulator;
Figure 14 is a plan view showing the process of moving the pyrolysis tank held by the gripper from the tank holder to the outside in the embodiment of Figure 13;
Figure 15 is a perspective view showing the process of opening the tank cover from the tank frame of the pyrolysis tank moved from the tank holder to the outside in the embodiment of Figure 14, discharging the sludge remaining after pyrolysis, and introducing the waste synthetic resin to be pyrolyzed.

Hereinafter, a preferred embodiment of the waste synthetic resin pyrolysis system according to the present invention will be described in detail with reference to the attached drawings.

As shown in Figures 1 and 2, the waste synthetic resin pyrolysis system according to the present invention includes a gas combustion chamber 100, a decomposition combustion chamber 200, a pyrolysis tank 300, a filtration and condensation unit 400, a supply pipe 500, It includes a tank holder 600 and a crane 700, and may further include a boiler 800, a cyclone scrubber 910, and a spray tower 920.

The inside of the gas combustion chamber 100 is heated by the thermal power of the burner 110, as shown in FIGS. 1 to 4. The burner 110 is ignited by injected gas to generate thermal power, and as shown in the figure, it can also receive and reuse fuel gas, which is a gaseous product generated after thermal decomposition of waste synthetic resin. This gas combustion chamber 100 communicates with the decomposition combustion chamber 200, which will be described later, and transmits the generated thermal power.

As shown in FIGS. 1 to 4, one side of the decomposition combustion chamber 200 is in communication with the gas combustion chamber 100, and the inside is heated by receiving the thermal power of the burner 110, and the inside is heated through the hot air outlet 210 on the other side. Discharges the heated interior. That is, the decomposition combustion chamber 200 is a furnace that receives the thermal power generated through the burner 110 of the gas combustion chamber 100 and transfers it to the pyrolysis tank 300, which will be described later.

As shown in FIGS. 1 to 15, the pyrolysis tank 300 is retractably installed at the top of the decomposition and combustion chamber 200, and receives heat from the decomposition and combustion chamber 200 to thermally decompose the waste synthetic resin contained therein. . When the waste synthetic resin is thermally decomposed in the pyrolysis tank 300, it is converted into gaseous products, liquid products, and solid products. The gaseous product contains CH ₄ , C ₂ H ₆ , C ₃ H ₈ as main components and can be used as fuel gas, and the liquid product is a hydrocarbon compound with a carbon number of 15 or less and can be used as oil of heavy oil or higher. In addition, the solid product is the main ingredient and can be used as an alternative fuel to coal, and can be used as a carbon source such as carbon black, activated carbon, and carbon nanotubes.

Here, the solid product remains inside the pyrolysis tank 300 as sludge, and the evaporated liquid product and gaseous product are filtered while passing through the filtration and condensation unit 400 through the supply pipe 500, which will be described later, and then condense to form a liquid. The product is produced from recycled oil, and the gaseous product can be collected as fuel gas or reused to generate thermal power in the burner 110 as discussed above.

That is, as shown in FIGS. 1 and 2, the filtration and condensation unit 400 receives the generated gas pyrolyzed from the pyrolysis tank 300 through the supply pipe 500, filters it, and condenses it to produce recycled oil. In this filtration and condensation unit 400, a filter and a condenser are installed as separate components. A wax removal unit is installed to remove wax components in advance to prevent clogging of the nozzle and to produce better quality recycled oil before passing through the filter. More may be included. Since each configuration of the wax removal unit, filter, and condenser of the filtration and condensation unit 400 is a prior art, detailed description thereof will be omitted.

The general thermal decomposition process through each of the above-described configurations, that is, the gas combustion chamber 100, decomposition combustion chamber 200, pyrolysis tank 300, and filtration and condensation unit 400, and the processing process of the products generated after pyrolysis are the same as the prior art. It's incendiary. However, while the pyrolysis tank 300 is mounted in the decomposition combustion chamber 200, the thermal power of the burner 110 is removed, the pyrolysis tank 300 is sufficiently cooled naturally, and then opened to remove the sludge, which is a solid product remaining from pyrolysis. And since the waste synthetic resin to be pyrolyzed must be re-introduced, continuous operation is impossible.

Therefore, in the present invention, the pyrolysis tank 300 is installed so as to be removable from the decomposition and combustion chamber 200, and the waste synthetic resin is pyrolyzed and heated through the tank holder 600 and crane 700, which will be described later. By systemizing the system to replace the pyrolysis tank 300 with another spare pyrolysis tank 300, continuous operation can be performed while maintaining the thermal power of the burner 110 even when the collected amount of waste synthetic resin is large, thereby reducing fuel consumption. and can increase the thermal decomposition efficiency.

That is, as shown in FIGS. 1 to 3, 9, and 10, the tank holder 600 naturally cools the pyrolysis tank 300, which is heated by pyrolysis of the waste synthetic resin, and provides an extra pyrolysis tank 300 containing the waste synthetic resin. Each pyrolysis tank 300 is mounted to standby for replacement.

At this time, as shown in FIGS. 1 to 4 and 9, the crane 700 withdraws the heated pyrolysis tank 300 from the decomposition and combustion chamber 200 and moves it to the tank holder 600, and the tank holder ( The extra pyrolysis tank 300 is moved from 600 and introduced into the decomposition and combustion chamber 200. The crane 700 may be installed as a ceiling mobile crane, or as shown in the drawing, as a vertical fixed crane.

Continuous operation can be made possible by replacing the heated pyrolysis tank 300 with the extra pyrolysis tank 300 to be pyrolyzed through the tank holder 600 and the crane 700. However, here, since the generated gas pyrolyzed from the pyrolysis tank 300 is supplied to the filtration and condensation unit 400 through the supply pipe 500, the pyrolysis tank 300 and the supply pipe 500 must be connected, and this connection portion A key feature is how to configure it to be detachable.

To this end, the pyrolysis tank 300 includes a tank frame 310, a tank cover 320, and a connecting pipe 330, as shown in FIGS. 4 to 8 and 15, and the supply pipe 500 is connected to It may include a pipe 510 and a bellows pipe 520.

First, the tank frame 310 of the pyrolysis tank 300 has a cylindrical shape with a hollow interior, and is retractable and removable from above the decomposition and combustion chamber 200 so that the open upper part protrudes outward from the decomposition and combustion chamber 200. It is installed, and the waste synthetic resin is accommodated therein. The lower part of the tank cover 320 is flange-coupled to the upper part of the tank frame 310 so that it can be opened and closed, and a gas discharge pipe 321 is formed to protrude upward in the center of the upper surface to discharge the generated gas, and a plurality of gas discharge pipes 321 are formed along the upper circumference of the upper surface. A locking ring 322 is formed so that the lifting wire 710 of the crane 700 is caught. The connection pipe 330 has one end in communication with the gas discharge pipe 321 of the tank cover 320, the other end is detachably connected to the supply pipe 500, and an opening/closing valve 331 in the center that opens and closes the flow path. ) is installed.

Next, the joint pipe 510 of the supply pipe 500 is installed on the flow path through which the generated gas is supplied so that the open end 511 faces the other end of the connection pipe 330 of the pyrolysis tank 300. At this time, one end of the bellows pipe 520 is fixedly coupled to the opening end 511 of the joint pipe 510, and the central corrugated pipe 521 is formed to be elastic so that the other end is connected to the connection pipe of the pyrolysis tank 300. It is detachably coupled to (330).

That is, as shown in FIGS. 5 and 7, the other end of the bellows pipe 520 is coupled with the connection pipe 330 with the opening and closing valve 331 open, and the waste synthetic resin accommodated inside the tank frame 310 is When thermally decomposed, the generated gas is discharged through the gas discharge pipe 321 of the tank cover 320, passes through the connecting pipe 330, passes through the bellows pipe 520, passes through the joint pipe 510, and is filtered along the supply pipe 500. It is supplied to the condensation unit 400.

Conversely, as shown in FIGS. 6 and 8, when the other end of the bellows pipe 520 is separated from the connection pipe 330 with the opening/closing valve 331 closed, as shown in FIG. 9, the crane 700 )'s lifting wire 710 can be hung on the hook 322 of the pyrolysis tank 300, taken out from the decomposition and combustion chamber 200, and moved to the tank holder 600.

At this time, as shown in FIGS. 5 to 8, the bellows pipe 520 is maintained horizontally with guide rods 523 inserted into the outer periphery of both ends facing each other in order to maintain the horizontal level when the corrugated pipe 521 is expanded and contracted. A bracket 522 may be further included. Through these horizontal maintenance brackets 522 and guide rods 523, durability is secured by preventing arbitrary bending due to the load of the corrugated pipe 521, and the connection pipe of the pyrolysis tank 300, which is replaced by fixing the horizontal position ( 330) can be easily performed.

Meanwhile, as shown in FIGS. 9 and 10, the tank holder 600 holds the pyrolysis tank 300, in which the waste synthetic resin is pyrolyzed and heated from the crane 700, to naturally cool it, and along with it, the waste synthetic resin is accommodated in the spare tank holder 600. In order to wait for replacement of the pyrolysis tank 300, each pyrolysis tank 300 is mounted. At this time, whether the pyrolysis tank 300 is in a heated state or waiting for replacement can be easily determined by specifying the mounting position of the pyrolysis tank 300 in advance or by detecting the temperature of each pyrolysis tank 300 through a sensor. You can.

Specifically, the tank holder 600 includes a holder main body 610 and a plurality of holder plates 620, as shown in FIGS. 9 to 14, and may further include a manipulator 630.

That is, the holder main body 610 is formed of a steel frame structure in the shape of a rectangular parallelepiped, and the plurality of holder plates 620 are each rectangular plate shaped and seated on the upper surface of the holder main body 610, and the pyrolysis tank 300 A tank insertion hole 310 is formed through the center so that the lower part can be inserted, and a supporting protrusion 320 protruding upward along the outer circumference of the tank insertion hole 310 supports the lower surface of the flange of the pyrolysis tank 300. Then, each of the pyrolysis tanks 300 is mounted.

Since the pyrolysis tank 300 mounted on the tank holder 600 is naturally cooled in a heated state after pyrolysis, the holder main body 610 is formed of a steel structure, and when necessary, a conveyor is installed on the holder main body 610. A plurality of mounting plates 620 may be configured to move along the conveyor. In addition, the pyrolysis tank 300 is not completely inserted and mounted in the tank insertion hole 310 of the mounting plate 620, but has a structure in which the lower surface of the flange of the pyrolysis tank 300 is supported and mounted on the mounting protrusion 320. By having this, it is easy to separate the pyrolysis tank 300 from the mounting plate 620, and in particular, when the mounting protrusion 320 is made of an insulating material, direct heat transfer to the mounting plate 620 can be minimized.

At this time, with the pyrolysis tank 300 mounted on the tank holder 600, the tank cover 320 is opened from the tank frame 310 as shown in FIG. 15 to remove the sludge, which is a solid product remaining inside. Also, the waste synthetic resin to be pyrolyzed may be reintroduced. However, the height of the tank holder 600 is high, and it is difficult to perform tasks such as sludge removal and waste synthetic resin re-injection within the operating radius of the crane 700, so the pyrolysis tank 300 cannot be moved from the tank holder 600 to the outside. The manipulator 630 is installed so that

That is, the manipulator 630 is movably installed on one side of the holder main body 610, as shown in FIGS. 9 to 14, and grips the outer peripheral surface of the pyrolysis tank 300 mounted on the holder plate 620 with a gripper. It is held by (631) and moved to the outside, or the pyrolysis tank (300) is mounted on the mounting plate (620) from the outside.

In addition, the gripper 631 of the manipulator 630 is a pair of bar-shaped tongs that operate to be close to or spaced apart from each other, and the surfaces facing each other grip the outer peripheral surface of the pyrolysis tank 300, and the upper ends of each grip the pyrolysis tank 300. The pyrolysis tank (300) is lifted and moved by supporting the lower surface of the flange (300).

At this time, three or four mounting protrusions 622 of the mounting plate 620 are formed in a cylindrical shape with a length longer than the upper and lower length of the gripper 631 so as not to interfere with the operation of the gripper 631. Supports the lower surface of the flange of the pyrolysis tank 300. In order to support the bottom of the flange of the pyrolysis tank 300 and keep it horizontal, at least three mounting protrusions 622 must be formed to provide three-point support. On the other hand, if four are formed to support four points as shown in the drawing, it is more stable. , more than 5 are possible, but it is not desirable due to waste of materials.

Meanwhile, the thermal power of the burner 110 is transmitted from one side of the decomposition and combustion chamber 200 to heat the interior. The heat heats the pyrolysis tank 300 to thermally decompose the waste synthetic resin, and also heats the other side of the decomposition and combustion chamber 200. Heated internal heat, that is, combusted waste gas, is discharged through the outlet 210. If these waste gases are released directly into the atmosphere, environmental pollution will naturally occur, so contaminants must be removed through various scrubbers and released into the atmosphere. Since the waste gas before discharge has sufficient heat, it would be more desirable to recover and recycle the waste heat.

Therefore, as shown in Figures 1 and 2, a waste heat recovery boiler 800 that communicates with the hot air outlet 210 of the decomposition combustion chamber 200 to recycle the heat of the waste gas, and the waste gas recycled from the boiler 800 It may further include a cyclone scrubber 910 and a spray tower 920 that collect contaminants after cooling, and if necessary, various other types of scrubbers such as ventri scrubbers or Tizen washers may be installed.

Referring to FIGS. 1 to 15 from each of the above-described configurations, the operating process of the waste synthetic resin pyrolysis system according to the present invention will be examined.

First, as shown in FIGS. 1 to 4, an extra pyrolysis tank 300 is mounted on the tank holder 600, and a pyrolysis tank 300 in which waste synthetic resin is accommodated in the decomposition combustion chamber 200 to perform pyrolysis. is in the input state. At this time, the thermal power of the burner 110 is transmitted to the decomposition combustion chamber 200 connected to the gas combustion chamber 100, and the pyrolysis tank 300 inserted into the decomposition combustion chamber 200 receives heat to pyrolyze the waste synthetic resin contained therein. do.

Here, as shown in FIGS. 5 and 7, the connecting pipe 330 of the pyrolysis tank 300 is connected to the bellows pipe 520, and the opening and closing valve 331 that opens and closes the flow path of the connecting pipe 330 is open. It is in a state of being Therefore, the waste synthetic resin accommodated inside the tank frame 310 is thermally decomposed, and the sludge, which is a solid product, remains inside the tank frame 310, and the generated gas containing the vaporized liquid product and gaseous product is exposed to the tank cover 320. It is discharged through the gas discharge pipe 321. The generated gas discharged through the gas discharge pipe 321 passes through the connection pipe 330, the bellows pipe 520, and the joint pipe 510, and then passes through the supply pipe 500 to the filtration and condensation unit 400 shown in FIGS. 1 and 2. As it passes through, it is filtered and condensed to produce recycled oil, and the remaining gaseous product can be reused to generate thermal power in the burner 110.

Since only sludge remains inside the pyrolysis tank 300, which has been introduced into the decomposition and combustion chamber 200, it is necessary to perform continuous operation by replacing it with an extra pyrolysis tank 300 mounted on the tank holder 600. .

To this end, as shown in FIGS. 6 and 8, the opening and closing valve 331 is operated to block the passage of the connecting pipe 330, and the corrugated pipe 521 of the bellows pipe 520 is compressed to connect the connecting pipe 330 and the Separate the bellows pipe (520).

Accordingly, as shown in FIG. 9, the pyrolysis tank 300 introduced into the decomposition and combustion chamber 200 is lifted and moved to the tank holder 600 using a crane 700. In addition, the crane 700 performs a process of moving and inserting the extra pyrolysis tank 300 mounted on the tank holder 600 into the decomposition and combustion chamber 200, and the extra pyrolysis tank introduced into the decomposition and combustion chamber 200. (300) can perform the thermal decomposition process described above.

As shown in FIG. 10, the pyrolysis tank 300 moved and mounted on the tank holder 600 is naturally cooled while mounted on the holder plate 620, and after sufficiently cooling, as shown in FIGS. 11 to 14. Likewise, the gripper 631 of the manipulator 630 is operated to carry it out. As shown in FIG. 15, the pyrolysis tank 300 taken out to the outside takes out the sludge remaining inside as the waste synthetic resin is pyrolyzed and, if necessary, goes through a washing process and reintroduces the waste synthetic resin to be pyrolyzed inside. The pyrolysis tank 300 into which the waste synthetic resin has been reintroduced is moved to the tank holder 600 by operating the manipulator 630 again, and is placed on standby for replacement.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters stated in the claims, and those skilled in the art can improve and change the technical idea of the present invention into various forms. Therefore, such improvements and changes will fall within the scope of protection of the present invention as long as they are obvious to those skilled in the art.

100: gas combustion chamber 110: burner
200: decomposition combustion chamber 210: hot air outlet
300: Pyrolysis tank 310: Tank frame
320: Tank cover
321: gas discharge pipe 322: hanging ring
330: Connection pipe 331: Open/close valve
400: Filtration and condensation unit
500: supply pipe
510: Joint pipe 511: Open end
520: bellows pipe 521: corrugated pipe
522: Horizontal maintenance bracket 523: Guide rod
600: Tank holder 610: Holder body
620: Holding plate
621: Tank insertion hole 622: Mounting projection
630: Manipulator 631: Gripper
700: Crane 710: Elevating wire
800: Boiler
910: Cyclone scrubber 920: Spray top

Claims (9)

A gas combustion chamber whose interior is heated by the thermal power of a burner, one side of which is in communication with the gas combustion chamber, the interior of which is heated by receiving the thermal power of the burner, and a decomposition combustion chamber which discharges the heated internal heat through a hot air outlet on the other side; , a pyrolysis tank installed to be retractable at the upper part of the decomposition and combustion chamber and receiving heat from the decomposition and combustion chamber to thermally decompose the waste synthetic resin contained therein; and the generated gas pyrolyzed from the pyrolysis tank is supplied through a supply pipe and filtered. A filtration condensation unit that produces recycled oil by condensing the waste synthetic resin, and a tank in which each pyrolysis tank is placed to naturally cool the pyrolysis tank heated by pyrolysis of the waste synthetic resin, and to standby for replacement of the extra pyrolysis tank containing the waste synthetic resin. It includes a holder and a crane that withdraws the heated pyrolysis tank from the decomposition and combustion chamber and moves it to the tank holder, and moves the extra pyrolysis tank from the tank holder to introduce it into the decomposition and combustion chamber,
The pyrolysis tank is,
A tank frame that has a cylindrical shape with a hollow interior, is installed to be retractable and removable above the decomposition and combustion chamber so that the open upper part protrudes outward from the decomposition and combustion chamber, and accommodates the waste synthetic resin therein;
The lower part is flange coupled to the upper part of the tank frame so that it can be opened and closed, a gas discharge pipe is formed to protrude upward in the center of the upper surface to discharge the generated gas, and a plurality of hooks are formed along the circumference of the upper surface to allow the lifting wire of the crane to A tank cover that gets caught,
A waste synthetic resin pyrolysis system comprising a connection pipe, one end of which is connected in communication with the gas discharge pipe of the tank cover, the other end of which is detachably connected to the supply pipe, and an opening and closing valve for opening and closing the flow path is installed in the center.
delete According to paragraph 1,
The supply pipe is,
A joint pipe installed on the flow path through which the generated gas is supplied so that the open end faces the other end of the connecting pipe of the pyrolysis tank,
A waste synthetic resin pyrolysis system comprising a bellows pipe, one end of which is fixedly coupled to the opening end of the joint pipe, the central corrugated pipe being elastically formed, and the other end of which is detachably coupled to the connection pipe of the pyrolysis tank.
According to paragraph 3,
The bellows pipe is,
The waste synthetic resin pyrolysis system further comprises a horizontal maintenance bracket through which guide rods are inserted into the outer periphery of both ends facing each other in order to maintain horizontality when the corrugated pipe is expanded and contracted.
According to paragraph 1,
The tank holder,
A stand body formed of a steel frame structure in the shape of a rectangular parallelepiped,
Each is seated on the upper surface of the holder body in the shape of a square plate, and a tank insertion hole is formed through the center so that the lower part of the pyrolysis tank is inserted. A waste synthetic resin pyrolysis system comprising a plurality of mounting plates that support the lower surface of the flange of the tank and respectively mount the pyrolysis tank.
According to clause 5,
The tank holder,
It is movably installed on one side of the holder main body, and grips the outer peripheral surface of the pyrolysis tank mounted on the holder plate with a gripper to move it to the outside, or further includes a manipulator for mounting the pyrolysis tank on the holder plate from the outside. A waste synthetic resin pyrolysis system characterized by:
According to clause 6,
The gripper of the manipulator is,
It is a pair of bar-shaped tongs that operate close to or spaced apart from each other, and the surfaces facing each other grip the outer peripheral surface of the pyrolysis tank, and the upper ends of each support the lower surface of the flange of the pyrolysis tank to lift and move the pyrolysis tank. A waste synthetic resin pyrolysis system.
In clause 7,
The mounting protrusions of the mounting plate are,
A waste synthetic resin pyrolysis system, characterized in that 3 or 4 cylinders are formed in a cylindrical shape with a length longer than the upper and lower lengths of the gripper to support the lower surface of the flange of the pyrolysis tank so as not to interfere with the operation of the gripper.
According to paragraph 1,
A boiler that communicates with the hot air outlet of the decomposition combustion chamber to recycle the heat of the waste gas,
A waste synthetic resin pyrolysis system further comprising a cyclone scrubber and a spray tower for collecting contaminants after cooling the waste gas recycled from the boiler.

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