KR20230173248A - Waste synthetic resin input apparatus with double screw structure and continuous type waste synthetic resin pyrolysis treatment facility using thereof - Google Patents

Abstract

In the present invention, when transferring and supplying waste synthetic resin to a pyrolysis transfer path, the entire process of inputting, stirring, compressing and supplying waste synthetic resin is automatically and continuously performed, and the amount of waste synthetic resin input is increased by increasing the number of screws for stirring and compression. The present invention relates to a waste synthetic resin input device with a multi-screw structure that can increase mixing and compression efficiency and a continuous waste synthetic resin pyrolysis treatment facility including the same.

Description

Waste synthetic resin input device with multi-screw structure and continuous waste synthetic resin pyrolysis treatment facility including the same

The present invention relates to a waste synthetic resin input device with a multi-screw structure and a continuous waste synthetic resin pyrolysis treatment facility including the same. More specifically, in transporting and supplying waste synthetic resin to a pyrolysis transfer path, input of waste synthetic resin, The entire process of stirring, compression, and supply is carried out automatically and continuously, and the number of screws for stirring and compression can be increased to increase the amount of waste synthetic resin input, as well as a multi-screw structure that can increase stirring and compression efficiency. It relates to an applied waste synthetic resin input device and a continuous waste synthetic resin pyrolysis treatment facility including the same.

Products made of synthetic resin, such as tires, vinyl, and plastic, which are widely used in various industrial fields and daily life, are recycled after use, and most are classified as waste and are landfilled or incinerated. These synthetic resin wastes are considerably larger in volume compared to their weight, so not only are landfill costs greater than regular waste, but they do not rot even when landfilled, so they are considered a social nuisance.

Recently, as a way to recycle synthetic resin waste without incinerating or landfilling it, research and development of emulsification methods and devices that can obtain useful oil by pyrolyzing synthetic resin waste has been actively conducted.

Conventionally, waste synthetic resin had to be added manually, so each time the material was added, the operation of the pyrolysis treatment unit was stopped and a certain period of time passed before the material was added. Not only was there inconvenience caused by adding the material, but work efficiency was extremely low, resulting in extremely low productivity. Because there are many problems, such as significant loss of material, there is a need to develop technology that can continuously operate the device and automatically add materials.

Accordingly, in the current pyrolysis treatment facility, a method of sequentially pyrolyzing waste through a plurality of transfer screws has been proposed. However, this pyrolysis device cannot increase the temperature at each stage, so the firebox temperature must be increased by increasing the supply heat source gas, so it has a large capacity. A burner was required, and there was a problem of clogging of the oil vapor duct and a large amount of tar being generated from the produced oil.

Korean Patent Publication No. 10-2016-0123516 Korean Patent Publication No. 10-2011-0075085 Korean Patent No. 10-2105183 Korean Patent No. 10-1379225

The present invention is intended to solve the above-described problems, and allows the entire process of inputting, stirring, compressing and supplying waste synthetic resin to proceed automatically and continuously, and the amount of waste synthetic resin input can be increased by increasing the number of screws for stirring and compression. The aim is to provide a waste synthetic resin input device with a multi-screw structure that can increase stirring and compression efficiency and a continuous waste synthetic resin pyrolysis treatment facility including the same.

A waste synthetic resin input device with a multi-screw structure according to an embodiment of the present invention includes an articulated crane 110 for inputting the waste synthetic resin, a hopper 120 for receiving the input waste synthetic resin, and a longitudinal direction within the hopper 120. A pair of stirring screws 130 are installed to agitate the inputted waste synthetic resin, and a pair of compression screws are installed in the longitudinal direction at the lower side of the hopper 120 to supply and simultaneously compress the stirred waste synthetic resin in one direction. (140), a pair of vertical agitators installed to be connected in a vertical direction at one end of the pair of compression screws 140, which transports the conveyed waste synthetic resin downward and at the same time releases the waste synthetic resin in a compressed state. It is connected to the screw 150 and each vertical stirring screw 150 and may include a pair of supply screws 160 that supply the transferred waste synthetic resin to the pyrolysis transfer path.

In one embodiment, the present invention, when the operating current of the pair of compression screws 140 is below a preset current value, the waste synthetic resin is compressed through the refractive crane 110 through PID (Proportional Integral Derivative) control. A notification can be created and output to allow the input amount to be adjusted.

In one embodiment, the pair of stirring screws 130 are installed parallel to each other and the pair of compression screws 140 while maintaining a constant distance, and the compression direction of the pair of compression screws 140 It can rotate in the opposite direction.

In one embodiment, the present invention, when the operating current of the pair of stirring screws 130 exceeds a preset current value, rotates the pair of stirring screws 130 through PID (Proportional Integral Derivative) control. The speed can be adjusted to slow down.

In one embodiment, the present invention, when the operating current of the pair of stirring screws 130 exceeds a preset current value, rotates the pair of stirring screws 130 through PID (Proportional Integral Derivative) control. The speed can be adjusted to slow down.

In one embodiment, the present invention controls the pair of vertical stirring screws 150 through PID (Proportional Integral Derivative) control depending on whether the operating current of the pair of compression screws 140 maintains a preset current value. ) The compression force of the waste synthetic resin can be adjusted by adjusting the rotation speed.

In one embodiment, the present invention maintains the rotational speed of the gas blower above a preset value for a preset time or more in the automatic operation mode, or the gas storage tank pressure remains above the preset value for a preset time in the automatic operation mode. When maintained above, the articulated crane 110, the pair of stirring screws 130, the pair of compression screws 140, the pair of vertical stirring screws 150, and the pair of supply screws ( 160) operation can be stopped.

A continuous waste synthetic resin pyrolysis treatment facility including a waste synthetic resin input device with a multi-screw structure according to another embodiment of the present invention includes a waste synthetic resin input unit 210 and waste synthetic resin input through the waste synthetic resin input unit 210. A pyrolysis treatment unit 220 configured to perform pyrolysis treatment multiple times while transporting the pyrolysis to one side to discharge oil vapor and oil, a tea treatment unit 230 for processing the char discharged from the pyrolysis treatment unit 220, An oil vapor heat exchange unit 240 that cools the oil vapor generated from the pyrolysis processing unit 220 and separates it into oil and gas, an oil processing unit 250 that stores the oil separated through the oil vapor heat exchange unit 240, and the oil vapor heat exchange unit. It may be configured to include a gas processing unit 260 that cools and stores the gas separated through 240.

In one embodiment, the pyrolysis treatment unit 220 is a pair of first pyrolysis treatment transfer screw conveyors configured to perform primary pyrolysis treatment while transferring the waste synthetic resin supplied through the pair of supply screws 216 to one side. (221), a pair of second pyrolysis treatment transfer screw conveyors 222 configured to undergo secondary pyrolysis treatment while transferring the pyrolyzed material transferred from the pair of first pyrolysis treatment transfer screw conveyors 221 to one side, A pair of third pyrolysis treatment transfer screw conveyors 223 and a pair of third pyrolysis treatment transfer screw conveyors 223 configured to undergo tertiary pyrolysis treatment while transferring the pyrolyzate transferred from the pair of second pyrolysis treatment transfer screw conveyors 222 to one side. It may include a pair of fourth pyrolysis treatment transfer screw conveyors 224 configured to discharge the pyrolysis residue transferred from the pyrolysis treatment transfer screw conveyor 223 to the outside.

In one embodiment, the pyrolysis treatment temperature through the pair of first pyrolysis treatment transfer screw conveyors 221 is configured to be maintained at 280 degrees Celsius to 350 degrees Celsius, and the pair of second pyrolysis treatment transfer screw conveyors 222 ) and the pyrolysis treatment temperature through the pair of third pyrolysis treatment transfer screw conveyors 223 is configured to be maintained at 310 degrees Celsius to 380 degrees Celsius, and the pyrolysis treatment temperature through the pair of fourth pyrolysis treatment transfer screw conveyors 224 is configured to be maintained at 310 degrees Celsius to 380 degrees Celsius. The pyrolysis treatment temperature may be configured to be maintained between 180 degrees Celsius and 220 degrees Celsius.

In one embodiment, the operating heat source of the pyrolysis processing unit 220 may be configured to automatically maintain the setting at 600 degrees Celsius to 900 degrees Celsius depending on the quality.

In one embodiment, the tea processing unit 230 has a residue discharge communication passage connected in communication to receive the tea generated in the pyrolysis treatment unit 220, and a first residue treatment transport connected to the residue discharge communication passage at one end. It may include a screw conveyor, a second residue treatment transfer screw conveyor connected in communication with the transfer end of the first residue treatment transfer screw conveyor, and a treatment residue storage tank for storing tea at the transfer end.

In one embodiment, the oil vapor heat exchange unit 240 includes a plurality of oil vapor supply pipes, one end of which is connected to the pair of first to fourth pyrolysis treatment transfer screw conveyors (221, 222, 223, and 224), the plurality of oil vapor supply pipes, respectively. The oil vapor transfer screw conveyor, which is configured to transfer the oil vapor flowing in from the oil vapor supply pipe to the oil vapor heat exchanger, includes a function to re-introduce the tar generated during transfer and transfer of the oil vapor back to the pyrolysis facility, and the oil vapor transfer screw conveyor A plurality of oil vapor heat exchangers configured to receive oil vapor from the oil vapor, cool it in multiple stages, and separate it into oil and gas, and a pyrolysis oil transfer screw that is connected in communication to the lower end of each of the plurality of oil vapor heat exchangers and transports the separated pyrolysis oil to one side. It may include a cooling medium circulation unit configured to supply and recover cooling medium to each of the conveyor and the plurality of oil vapor heat exchangers.

In one embodiment, the oil processing unit 250 includes a pyrolysis oil collection tank that collects pyrolysis oil discharged from the oil vapor heat exchange unit 240, and transfers the pyrolysis oil collected in the pyrolysis oil collection tank to the following pyrolysis oil storage tank. A first pyrolysis oil transfer pump, a pyrolysis oil storage tank for storing the pyrolysis oil transferred from the first pyrolysis oil transfer pump, a pyrolysis oil injection pump for transferring the pyrolysis oil collected in the pyrolysis oil collection tank to the oil cooling tower below, and It may include an oil cooling tower that receives the pyrolysis oil transferred to the pyrolysis oil injection pump, cools it, and then supplies it to the oil vapor heat exchanger on the most upstream side in the oil vapor heat exchange unit 240.

In one embodiment, the gas processing unit 260 includes a plurality of pyrolysis oil cooling towers that receive the pyrolysis gas from the oil vapor heat exchange unit 240 and cool it in a multi-stage manner, and receive the pyrolysis gas from the pyrolysis oil cooling tower and separate oil and water. A separator, a gas blower for transporting one or more gas storage tanks that sucks pyrolysis gas from the oil-water separator and supplies it to the following gas storage tank, a gas storage tank that stores the gas sucked in by the gas blower for transporting the gas storage tank, and the gas. It may include a gas burner gas supply tank that receives gas from a storage tank and stores gas to be supplied to the gas burner included in the pyrolysis processing unit 220.

According to one aspect of the present invention, by increasing the number of screws for stirring and compression, the amount of waste synthetic resin input into the hopper can be increased, and by comparing the operating current value between the stirring screw and the compression screw, the By automatically adjusting the rotation speed, it has the advantage of preventing overload that occurs when compressing waste synthetic resin.

In addition, according to one aspect of the present invention, the compression force of the waste synthetic resin can be kept constant based on PID control, which has the advantage of minimizing the decrease in thermal decomposition efficiency and enabling stable operation of the supply screw.

In addition, according to one aspect of the present invention, by detecting abnormal signs in real time based on the rotational speed of the gas blower or the pressure value of the gas storage tank in the automatic operation mode, it is possible to block factors that may cause overload of the facility in advance. , it has the advantage of preventing overload of equipment by adjusting the rotation direction of each screw to the forward or reverse direction when foreign matter is mixed.

Figure 1 is a diagram showing the overall configuration of a waste synthetic resin injection device 100 to which a multi-screw structure is applied according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating in more detail the pair of stirring screws 130 and compression screws 140 shown in FIG. 1.
FIG. 3 is a diagram showing the overall configuration of a continuous waste synthetic resin pyrolysis treatment facility 200 including a waste synthetic resin input device using the multi-screw structure shown in FIG. 1.

Below, preferred embodiments are presented to aid understanding of the present invention. However, the following examples are provided only to make the present invention easier to understand, and the content of the present invention is not limited by the examples.

Figure 1 is a diagram showing the configuration of a waste synthetic resin injection device 100 to which a multi-screw structure is applied according to an embodiment of the present invention, and Figure 2 shows a pair of stirring screws 130 and compression screws shown in Figure 1 ( This is a drawing showing 140) in more detail.

1 and 2, the waste synthetic resin input device 100 with a multi-screw structure according to an embodiment of the present invention largely includes an articulated crane 110 for inputting the waste synthetic resin, and a hopper ( 120), a pair of stirring screws 130 that are installed in the longitudinal direction within the hopper 120 and agitate the inputted waste synthetic resin, are installed in the longitudinal direction at the lower side of the hopper 120 and move the stirred waste synthetic resin in one direction A pair of compression screws (140) that supply and compress at the same time, are installed to be connected in a vertical direction at one end of the pair of compression screws (140), and transport the conveyed waste synthetic resin downward and simultaneously compress it. It includes a pair of vertical stirring screws (150) that loosen the waste synthetic resin and a pair of supply screws (160) that are connected to each vertical stirring screw (150) and supply the transferred waste synthetic resin to the pyrolysis transfer path. It can be configured.

First, the articulated crane 110 can be a three-stage articulated crane for the smooth loading, crushing, storage, and input of waste synthetic resin, which is the main raw material, into the hopper 120, and can be installed so that the working radius is 9.5 m. there is. In addition, the articulated crane 110 is provided with a notification generating means (not shown) that generates and outputs an alarm notification when the operating current of the pair of compression screws 140, which will be described later, falls below a preset current value (1.5A). It can be. Therefore, during normal operation of a pair of compression screws 140, which will be described later, when the operating current of any one of the pair of compression screws 140 falls below a preset current value, the articulated crane ( An alarm notification can be output on the HMI screen for automatic operation connected to 110). This can be output in various forms (visual, auditory, etc.) that can be recognized by the worker, and by inducing the worker who recognizes this to remotely control the articulated crane 110, the amount of waste synthetic resin input into the hopper 120 can be adjusted. make it possible

For example, the waste synthetic resin introduced through the refracting crane 110 may be stored centrally in one place of the hopper 120, and a certain amount may be fed into a pair of stirring screws 130 to It is also possible to ensure that a certain amount is uniformly stirred through (130). Furthermore, because the amount of compression of the waste synthetic resin through the pair of compression screws 140 can be uniformly adjusted by adjusting the input amount of the bending crane 110, the pair of stirring screws 130 and the pair of stirring screws 130 Overload of the compression screw 140 can be prevented in advance.

The hopper 120 serves to accommodate a large amount of waste synthetic resin introduced through the articulated crane 110, and can be formed in an upper and lower shape with the upper and lower parts open. In addition, a pair of stirring screws 130 may be provided in the longitudinal direction (longitudinal direction) inside, and the waste synthetic resin is discharged through a pair of open areas provided on the lower side. In this case, a pair of compression screws are provided in each open area. A screw 140 is provided.

A pair of stirring screws 130 serve to agitate a large amount of waste synthetic resin introduced into the hopper 120. At this time, the stirring drive motor, the stirring shaft that rotates by being coupled to the rotation axis of the stirring drive motor, and the outer peripheral surface of the stirring shaft It may be configured to include a spiral stirring blade provided along. The pair of stirring screws 130 can be more easily compressed through the pair of compression screws 140 by breaking or loosening a large amount of waste synthetic resin input into the hopper 120 if it is lumped or pressed. Let it be.

The stirring drive motor is connected to a drive motor that drives a pair of compression screws 140, which will be described later, and is driven by Proportional Integral Derivative (PID) control. This is to ensure that the waste synthetic resin is always constantly stirred and that the waste synthetic resin supplied to the pair of compression screws 140 through the pair of stirring screws 130 are interconnected and supplied smoothly and efficiently.

Meanwhile, a pair of stirring screws 130 are installed parallel to each other in the hopper 120 while maintaining a certain distance (for example, 150 mm) from each other, and at this time, the compression direction of the pair of compression screws 140 It rotates in the opposite direction (direction of rotation).

In addition, the pair of stirring screws 130 receives the operating current value of the pair of compression screws 140, and the operating current value of the pair of stirring screws 130 is set to a preset current value (for example, 2.5A). ), the rotation speed can be automatically adjusted to slow down through PID control. Through this, the compression load on the pair of compression screws 140 is reduced, thereby preventing failure or damage due to overload.

Additionally, in one embodiment, the stirring drive motor that operates the pair of stirring screws 130 may change the rotation direction between forward rotation and reverse rotation depending on the situation.

A pair of compression screws 140 are provided below a pair of open areas provided in the longitudinal direction (lengthwise) at the bottom of the hopper 120, and supply waste synthetic resin discharged through the pair of open areas in one direction. At the same time, it serves to compress the waste synthetic resin.

This pair of compression screws 140 is a pair of conveyor ducts (or conveyor pipes) communicating with a pair of open areas provided in the lower part of the hopper 120, and a pair of compression drives provided in the pair of conveyor ducts. It may be configured to include a motor, a rotation shaft coupled to the rotation axis of the compression drive motor and extending in the longitudinal direction of the conveyor duct, and a compression screw provided along the outer peripheral surface of the rotation shaft.

Here, the rotating shaft is formed to extend larger than the opening size of the pair of open areas provided in the lower part of the hopper 120. That is, this means that the length of the rotating shaft is longer than the opening size of the hopper 120.

At this time, the compression screw transfers the waste synthetic resin in the rotational direction through its spiral structure, and the pitch may be gradually narrowed based on the transfer direction. Accordingly, the compression efficiency through the pair of compression screws 140 can be increased by increasing the conveying speed due to the narrowing pitch.

The waste synthetic resin compressed and transferred through a pair of compression screws 140 is transferred to a pair of vertical stirring screws 150.

A pair of vertical stirring screws 150 are installed to be connected in a vertical direction at one end of the pair of compression screws 140, and simultaneously transport the conveyed waste synthetic resin in a downward direction. It plays a role in releasing the compressed waste synthetic resin.

This pair of vertical stirring screws 150 is formed at a 90-degree angle with the pair of compression screws 140, and includes a vertically provided rotating shaft, a drive motor that rotates the rotating shaft, and a stirring mechanism formed along the outer peripheral surface of the rotating shaft. It may be configured to include screws.

At this time, the rotation speed of the pair of vertical stirring screws 150 is adjusted through PID control depending on whether the pair of compression screws 140 receives the operating current value and maintains the preset current value (2.0A). This allows the waste synthetic resin to be compressed at a constant pressure. The waste synthetic resin transported downward through a pair of vertical stirring screws 150 is supplied to each pyrolysis transfer path through a pair of supply screws 160.

This pair of vertical stirring screws 150 loosens the waste synthetic resin that has been excessively compressed or clumped by the pair of compression screws 140 and supplies it to the pair of supply screws 160, thereby increasing the thermal decomposition efficiency due to the lumped waste synthetic resin. It prevents deterioration and prevents overload of the pair of supply screws (160) in advance to enable stable operation.

The pair of supply screws 160 are each connected to the lower part of the vertical stirring screw 150, and serve to supply the waste synthetic resin transported through the pair of vertical stirring screws 150 to the pyrolysis transfer path.

At this time, the pair of supply screws 160 includes a drive motor, a rotation shaft connected to the drive motor, and a spiral screw formed along the outer peripheral surface of the rotation shaft. In this case, the cross-sectional shape of the screw has a pentagonal shape, and a pair of supply screws ( 160) can be installed so that the installation angle is about 50 degrees toward the upper side. At this time, as the pair of supply screws 160 are driven, the waste synthetic resin is supplied to the pyrolysis transfer path and at the same time, the clumped portion of the waste synthetic resin can be continuously released, thereby further preventing a decrease in pyrolysis efficiency.

In addition, in one embodiment, the present invention maintains the rotation speed of the gas blower in the automatic operation mode for more than a preset rotation speed (e.g., 3500 rpm) for a preset time (e.g., 10 seconds or more), or In the automatic operation mode, when the gas storage tank pressure is maintained above the preset value for more than a preset time, the articulated crane 110, a pair of stirring screws 130, a pair of compression screws 140, and a pair of Equipment overload can be prevented in advance by stopping the operation of the pair of vertical stirring screws 150 and the pair of supply screws 160. In addition, when overload occurs due to mixing of foreign substances, foreign substances are discharged in the reverse direction by changing the rotation direction (forward rotation, reverse rotation) of the pair of stirring screws 130 and the pair of compression screws 140 discussed above. The jam can be released.

In addition, in one embodiment, the present invention detects the compression force of the waste synthetic resin compressed by a pair of compression screws 140 and adjusts the rotation speed of the drive motor that drives the pair of vertical stirring screws 150 based on this. It may further include a pressure detection sensor.

When the detected compression value is greater than the preset compression force, the pressure detection sensor increases the speed of the drive motor that drives the pair of vertical stirring screws 150 in conjunction with this, thereby compressing the upper side of the pair of vertical stirring screws 150. By releasing the spent synthetic resin, it can be supplied more smoothly.

Meanwhile, although not shown in the drawing, the present invention may further include a catalyst input unit (not shown). The catalyst introduced through the catalyst inlet is preferably zeolite, and more preferably slaked lime (calcium hydroxide). This is to reduce the cost of catalyst input.

Additionally, zeolite or slaked lime may be used as the catalyst. At this time, the zeolite contains SiO2 62.2-75.0 wt%, Al2O2 10.0-21.0 wt%, Na2O 1.5-5.0 wt%, K2O 1.7-3.5 wt%, CaO 0.8-2.5 wt%, Fe2O2 0.5-1.8 wt%, and 0.5 wt% of other components. It contains ~1.8 wt%, and the loss on ignition is 5.2~15.3 wt%, and other components may include FeO, TiO2, P2O5, and MnO. Additionally, the pH of the zeolite may be 9.0 to 10.5, and the cation exchange capacity (CEC) may be 80 to 92 meq/100g. Slaked lime may contain more than 70% of CaO, less than 2% of SiO2, less than 3% of MgO, less than 1% of Fe2O3, and less than 1% of Al2O3, and preferably does not contain sulfur.

In addition, the slaked lime has a particle size that allows more than 95% of the slaked lime to pass through a 325 mesh sieve. Specifically, it is desirable to have a particle size that allows 96.58% of the slaked lime to pass through a 325 mesh sieve.

Here, when zeolite is used as the catalyst, the formation of suspended substances such as tar, which is generated when oil vapor is generated, is suppressed while making it easy to remove suspended substances such as tar, and when slaked lime is used as the catalyst, it is a strong alkali component to remove oil vapor. It is easy to suppress the formation of suspended substances such as tar and remove suspended substances such as tar, which are generated at the same time, and can easily neutralize the produced oil.

Next, we will look at the overall configuration of the continuous waste synthetic resin pyrolysis treatment facility 200, which includes the waste synthetic resin input device with the multi-screw structure described above.

FIG. 3 is a diagram showing the overall configuration of a continuous waste synthetic resin pyrolysis treatment facility 200 including a waste synthetic resin input device using the multi-screw structure shown in FIG. 1.

Looking at Figure 3, the continuous waste synthetic resin pyrolysis treatment facility 200 including a waste synthetic resin input device with a multi-screw structure is largely divided into a waste synthetic resin input unit 210, a pyrolysis treatment unit 220, a tea treatment unit 230, and oil vapor. It may be configured to include a heat exchange unit 240, an oil processing unit 250, and a gas processing unit 260.

Since the waste synthetic resin input unit 210 corresponds to the waste synthetic resin input device 100 to which the multi-screw structure described above is applied, a detailed description will be omitted.

The pyrolysis treatment unit 220 transfers the waste synthetic resin input through the waste synthetic resin input unit 210 to one side and performs pyrolysis treatment multiple times, thereby allowing oil vapor and oil to be discharged.

More specifically, the pyrolysis treatment unit 220 is a device that performs pyrolysis of the input waste synthetic resin by transferring it in stages according to changes in the rotation speed of an automatically controlled screw. It receives the waste synthetic resin from the waste synthetic resin input unit 210 and decomposes the waste synthetic resin into waste synthetic resin. It is configured to include a multi-stage pyrolysis transfer screw conveyor to generate oil vapor by pyrolyzing the oil.

This pyrolysis treatment unit 220 transfers the waste synthetic resin supplied through the pair of supply screws 216 of the waste synthetic resin input unit 210 to one side while performing primary pyrolysis treatment. A screw conveyor, a pair of first pyrolysis treatment transfer screw conveyors, and a pair of second pyrolysis treatment transfer screw conveyors configured to undergo secondary pyrolysis treatment while transferring the pyrolyzate transferred from the first pyrolysis treatment transfer screw conveyor to one side. A pair of third pyrolysis treatment transfer screw conveyors configured to undergo tertiary pyrolysis treatment while transferring the pyrolysis material transferred from the conveyor to one side, and a pair of third pyrolysis treatment transfer screw conveyors configured to discharge the pyrolysis residue to the outside. It may be configured to include a pair of fourth pyrolysis treatment transfer screw conveyors.

A pair of first to fourth pyrolysis treatment transfer screw conveyors are formed in multiple stages, so that the inputted waste synthetic resin is pyrolyzed by the heat of the gas burner in the process of being transferred in a zigzag shape to generate oil vapor.

Here, the temperature of the pyrolysis processing unit 220 is automatically adjusted through automatic adjustment of the gas pressure according to the internal temperature of the pyrolysis reactor body set to control the yield of oil and gas, and a pair of first to fourth pyrolysis treatments are transferred. The screw conveyor performs thermal decomposition by automatically proportionally controlling the rotation speed according to the set values of current (current value) and temperature (outlet oil vapor temperature), and automatically transfers the generated oil vapor and cooled oil to the subsequent process.

In addition, the internal temperature of the pyrolysis reactor main body of the pyrolysis processing unit 220 is automatically adjusted. Considering that if the temperature inside the pyrolysis reactor main body is kept high, pyrolysis occurs well and the amount of gas generated increases, and if it is kept low, the oil production amount increases. , the operating temperature is set according to the quality (e.g., moisture content) of the input fuel, and in order to automatically maintain this set temperature, the gas pressure set value of the gas burner gas supply tank for supplying gas to the gas burner is used as a numerical control function. It is automatically changed so that the internal temperature of the pyrolysis reactor main body is automatically and consistently adjusted.

The tea treatment unit 230 serves to compress and process the pyrolysis residue, Char, discharged from the pyrolysis treatment unit 220. Through this compression, the discharge of oil vapor is blocked and only the tea is automatically discharged to the outside.

More specifically, the tea processing unit 230 has a residual tea discharge communication passage connected to the distal end of the pair of fourth pyrolysis treatment transfer screw conveyors of the pyrolysis processing unit 220, and a residual tea discharge communication passage at one end of the pyrolysis processing unit 220. A first residue treatment transfer screw conveyor is connected, a second residue treatment transfer screw conveyor is connected in communication with the transfer end (other end) of the first residue treatment transfer screw conveyor, and a treatment residue storage tank (or tone bag) for storing residues. It can be configured to include.

This tea treatment unit 230 is operated to block external leakage of oil vapor in the process of discharging the remaining tea (Char) by pyrolyzing the waste synthetic resin in the pyrolysis treatment unit 220 and automatically discharges only the tea to the outside.

The first residue treatment transfer screw conveyor serves to primary transport and compress the tea, and after pyrolysis is completed, it rotates at a set speed according to the amount of tea discharged from the pair of fourth pyrolysis treatment transfer screw conveyors 224. and is emitted.

In addition, the second residue treatment transfer screw conveyor adjusts the rotation speed in conjunction with the operating current value of the first residue treatment transfer screw conveyor to automatically and continuously discharge the tea compressed by the first residue treatment transfer screw conveyor while maintaining a constant compression state. Proportional control prevents external leakage of oil vapor and automatically discharges only the vehicle.

The tea is then transferred to a treatment residue storage tank (or ton bag) that collects the tea discharged from the second residue treatment transfer screw conveyor.

Each transfer screw conveyor of this tea processing unit 230 is operated in an automatic operation mode, and when the condition of the preset temperature or higher is satisfied, it automatically operates in the order of the second residue treatment transfer screw conveyor -> the first residue treatment transfer screw conveyor. When stopped, it automatically stops in the reverse order of operation.

The oil vapor heat exchange unit 240 serves to cool the oil vapor generated from the pyrolysis treatment unit 220 and separate it into oil (pyrolysis oil) and gas (pyrolysis gas).

More specifically, the oil vapor heat exchange unit 240 is a plurality of oil vapors, one end of which is connected to each of the multi-stage pyrolysis transfer screw conveyors, so that oil vapor generated by pyrolysis in the multi-stage pyrolysis transfer screw conveyor of the pyrolysis processing unit 220 is supplied to the oil vapor transfer screw conveyor. An oil vapor transfer screw conveyor configured to transfer oil vapor flowing in from a supply pipe and a plurality of oil vapor supply pipes to the following oil vapor heat exchanger, and a plurality of oil vapors configured to receive oil vapor from the oil vapor transfer screw conveyor, cool it in multiple stages, and separate it into oil and gas. A pyrolysis oil transfer screw conveyor is connected to the lower end of each of the heat exchanger and the plurality of oil vapor heat exchangers and transports the separated pyrolysis oil to one side, and is configured to supply and recover the cooling medium (cooling water) to each of the plurality of oil vapor heat exchangers. It may be configured to include a cooling medium circulation unit.

The oil vapor transport screw conveyor is controlled to operate automatically with the rotation speed adjusted according to the set operating current value when transporting oil vapor, and is automatically controlled to reintroduce the tar generated during transport into the pyrolysis chamber to proceed with pyrolysis.

The oil vapor heat exchanger receives the cooling medium (coolant) supplied through the cooling medium circulation unit, cools the oil vapor through heat conduction heat exchange, and separates it into oil and gas.

This oil vapor heat exchanger is largely composed of first to fourth heat exchangers, and a zigzag pyrolysis gas supply pipe is formed from the bottom of the oil vapor heat exchanger on the upstream side to the bottom of the next oil vapor heat exchanger based on the direction in which oil vapor is supplied. And the oil vapor heat exchanger at the final stage is configured with a pyrolysis gas discharge pipe connected to supply pyrolysis gas to the gas processing unit 260.

The pyrolysis oil transfer screw conveyor operates at a preset constant rotation speed.

The cooling medium circulation unit includes a cooling water reservoir, a plurality of cooling water circulation pumps configured to supply and recover cooling water from the cooling water reservoir to the oil vapor heat exchanger, and a cooling tower that recovers the cooling water heat exchanged in the oil vapor heat exchanger, cools it, and provides it to the cooling water reservoir. In this way, the cooling water circulated and recovered in the cooling medium circulation unit may be configured to supply the cooling water used in the processing unit 260.

The oil processing unit 250 is configured to transport and store the oil (i.e., pyrolysis oil) separated from the oil vapor heat exchange unit 240.

For this purpose, the oil processing unit 250 includes a pyrolysis oil collection tank that collects the pyrolysis oil transferred from the pyrolysis oil transfer screw conveyor of the oil vapor heat exchange unit 240, and the pyrolysis oil collected in the pyrolysis oil collection tank into the following pyrolysis oil storage tank. It may be configured to include a pyrolysis oil transfer pump for transferring pyrolysis oil and a pyrolysis oil storage tank for storing pyrolysis oil transferred from the pyrolysis oil transfer pump.

In addition, the oil processing unit 250 receives the pyrolysis oil supplied to the pyrolysis oil injection pump and the pyrolysis oil injection pump for transferring the pyrolysis oil collected in the pyrolysis oil collection tank to the oil cooling tower, cools it, and then supplies it to the oil vapor heat exchanger on the most upstream side. It may be configured to further include an oil cooling tower.

The oil processing device unit 250 configured in this way basically operates in an automatic operation mode, and when the pyrolysis oil collected in the pyrolysis oil collection tank exceeds a certain amount (Level High), it operates for a set time (for example, 20 seconds) or less. The pyrolysis oil transfer pump operates automatically until the oil reaches (Level Low) and is automatically transferred and stored to the selected oil storage location, the pyrolysis storage tank or intermediate storage tank.

The gas processing unit 260 is configured to inhale and cool the gas separated from the oil vapor heat exchange unit 240 under a set pressure, and to transfer and store the cooling gas.

More specifically, the gas processing unit 260 provides pyrolysis gas from a plurality of pyrolysis oil cooling towers and pyrolysis oil cooling towers that receive the pyrolysis gas separated from the oil vapor heat exchanger at the final stage of the oil vapor heat exchanger 240 and cool it in a multi-stage manner. An oil-water separator that receives and separates oil and water, one or more gas blowers for transferring gas storage tanks that sucks pyrolysis gas from the oil-water separator and supplies it to the gas storage tank, and a gas storage tank that stores the gas sucked in by the gas blowers for transferring gas storage tanks, and It may be configured to include a palling tower that removes foreign substances (tar, etc.) contained in the final gas.

The cooling medium (cooling water) used in the pyrolysis oil cooling tower is configured to be supplied from the cooling medium circulation unit. Oil generated from these pyrolysis oil cooling towers and polling towers may be configured to be recovered into a pyrolysis oil collection tank.

Additionally, in one embodiment, the gas processing unit 260 may further include a gas burner gas supply tank that receives gas from the gas storage tank and stores the gas supplied to the gas burner of the pyrolysis processing unit 220.

The gas processing unit 260, configured in this way, blows the oil vapor generated during thermal decomposition in the oil vapor heat exchanger 240 of the gas blower for transporting the gas storage tank according to the pressure set to the pressure required for stable operation of the facility (preferably, 10 mmH ₂ O). It can be configured to automatically adjust the rotation speed and automatically transfer to the gas storage tank.

According to the present invention as described above, stable thermal decomposition can be performed by automatically adjusting the operating situation according to changes in the quality contained in the waste synthetic resin, such as temperature and moisture, during the process of treating waste synthetic resin, and stable thermal decomposition is possible, resulting in overall treatment efficiency. Not only can the yield of oil and gas be increased, but especially by increasing the number of screws for stirring and compression, the amount of waste synthetic resin input into the hopper can be increased, and the operating current value between the stirring screw and compression screw can be increased. By automatically adjusting the rotation speed of each screw through comparison, it has the advantage of preventing overload that occurs when compressing waste synthetic resin.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it is possible.

100: Waste synthetic resin input device with multi-screw structure
110: Articulating crane
120: Hopper
130: stirring screw
140: compression screw
150: Vertical stirring screw
160: feed screw

Claims (13)

An articulated crane (110) for injecting waste synthetic resin;
A hopper 120 that accommodates the input waste synthetic resin;
A pair of stirring screws 130 installed in the longitudinal direction within the hopper 120 and stirring the introduced waste synthetic resin;
A pair of compression screws 140 installed in the longitudinal direction below the hopper 120 and supplying and simultaneously compressing the stirred waste synthetic resin in one direction;
A pair of vertical stirring screws (150) installed to be connected in a vertical direction at one end of the pair of compression screws (140) and transporting the conveyed waste synthetic resin downward and simultaneously releasing the waste synthetic resin in a compressed state. ; and
A waste synthetic resin input device with a multi-screw structure, characterized in that it includes a pair of supply screws (160) connected to each vertical stirring screw (150) and supplying the transferred waste synthetic resin to the pyrolysis transfer path.
According to paragraph 1,
When the operating current of the pair of compression screws 140 falls below a preset current value, a notification is generated to adjust the input amount of waste synthetic resin through the bending crane 110 through PID (Proportional Integral Derivative) control. And a waste synthetic resin input device with a multi-screw structure, characterized in that it outputs.
According to paragraph 1,
The pair of stirring screws 130 are installed in parallel with the pair of compression screws 140 while maintaining a predetermined distance, and rotate in a direction opposite to the compression direction of the pair of compression screws 140. A waste synthetic resin injection device with a multi-screw structure, characterized in that.
According to paragraph 3,
When the operating current of the pair of stirring screws 130 exceeds a preset current value, the rotation speed of the pair of stirring screws 130 is slowed and adjusted through PID (Proportional Integral Derivative) control. A waste synthetic resin injection device with a multi-screw structure.
According to paragraph 1,
When the operating current of the pyrolysis transfer path respectively connected to the pair of supply screws 160 exceeds a preset current value, the rotational speed of the pair of compression screws 140 is adjusted through PID (Proportional Integral Derivative) control. A waste synthetic resin injection device with a multi-screw structure, characterized by deceleration adjustment.
According to paragraph 1,
Depending on whether the operating current of the pair of compression screws 140 maintains the preset current value, the rotation speed of the pair of vertical stirring screws 150 is adjusted through PID (Proportional Integral Derivative) control to A waste synthetic resin injection device with a multi-screw structure, characterized by controlling the compression force of synthetic resin.
According to paragraph 1,
In the automatic operation mode, if the rotational speed of the gas blower is maintained above the preset value for a preset time or the gas storage tank pressure in the automatic operation mode is maintained above the preset value for a preset time,
Operation of the articulated crane 110, the pair of stirring screws 130, the pair of compression screws 140, the pair of vertical stirring screws 150, and the pair of supply screws 160 A waste synthetic resin injection device with a multi-screw structure, characterized in that it stops.
An articulated crane 211 for injecting the waste synthetic resin, a hopper 212 for receiving the injected waste synthetic resin, and a pair of stirring screws 213 installed in the longitudinal direction within the hopper 212 and stirring the injected waste synthetic resin. , a pair of compression screws 214 installed in the longitudinal direction below the hopper 212 and supplying and simultaneously compressing the stirred waste synthetic resin in one direction, vertically at one end of the pair of compression screws 214. It is installed to be connected in one direction and is connected to a pair of vertical stirring screws 215 and each vertical stirring screw 215 that transports the waste synthetic resin to the lower side and simultaneously releases the waste synthetic resin in a compressed state. A waste synthetic resin input unit 210 including a pair of supply screws 216 for supplying the waste synthetic resin to the pyrolysis transfer path;
A pyrolysis treatment unit 220 configured to pyrolyze the waste synthetic resin inputted through the waste synthetic resin input unit 210 to one side and pyrolyze it multiple times to discharge oil vapor and oil;
A tea processing unit 230 that processes the char discharged from the pyrolysis treatment unit 220;
An oil vapor heat exchange unit 240 that cools the oil vapor generated from the thermal decomposition processing unit 220 and separates it into oil and gas;
An oil processing unit 250 that stores the oil separated through the oil vapor heat exchange unit 240; and
Continuous waste synthetic resin pyrolysis treatment including a waste synthetic resin input device with a multi-screw structure, characterized in that it includes a gas processing unit 260 that cools and stores the gas separated through the oil vapor heat exchange unit 240. facility.
According to clause 8,
The thermal decomposition processing unit 220,
A pair of first pyrolysis treatment transfer screw conveyors configured to undergo primary pyrolysis treatment while transferring the waste synthetic resin supplied through the pair of supply screws 216 to one side;
a pair of second pyrolysis treatment transfer screw conveyors configured to perform secondary pyrolysis treatment while transferring the pyrolyzed material transferred from the pair of first pyrolysis treatment transfer screw conveyors to one side;
a pair of third pyrolysis treatment transfer screw conveyors configured to undergo third pyrolysis treatment while transferring the pyrolyzed material transferred from the pair of second pyrolysis treatment transfer screw conveyors to one side; and
A pair of fourth pyrolysis treatment transfer screw conveyors configured to discharge to the outside the pyrolysis residues transferred from the pair of third pyrolysis treatment transfer screw conveyors; inputting waste synthetic resin with a multi-screw structure, characterized in that it includes a. A continuous waste synthetic resin pyrolysis treatment facility including a device.
According to clause 8,
The tea processing unit 230,
a residual material discharge communication path connected to receive the tea generated in the pyrolysis treatment unit 220;
A first residue disposal transfer screw conveyor connected to the residue discharge communication path at one end;
a second residue treatment transfer screw conveyor connected in communication with the transfer end of the first residue treatment transfer screw conveyor; and
It is connected in communication with the transfer end of the second residue treatment transfer screw conveyor,
A continuous waste synthetic resin pyrolysis treatment facility including a waste synthetic resin input device with a multi-screw structure, characterized in that it includes a treatment residue storage tank for storing tea.
According to clause 9,
The oil vapor heat exchange unit 240,
A plurality of oil vapor supply pipes, one end of which is respectively connected to the pair of first to fourth pyrolysis treatment transfer screw conveyors;
An oil vapor transfer screw conveyor configured to transport oil vapor flowing in from the plurality of oil vapor supply pipes to the following oil vapor heat exchanger;
A plurality of oil vapor heat exchangers configured to receive oil vapor from the oil vapor transfer screw conveyor, cool it in multiple stages, and separate it into oil and gas;
A pyrolysis oil transfer screw conveyor connected to a lower end of each of the plurality of oil vapor heat exchangers in communication and transporting the separated pyrolysis oil to one side; and
A continuous waste synthetic resin pyrolysis treatment facility comprising a waste synthetic resin input device with a multi-screw structure, characterized in that it includes a cooling medium circulation unit configured to supply and recover the cooling medium to each of the plurality of oil vapor heat exchangers.
According to clause 11,
The oil processing unit 250,
A pyrolysis oil collection tank that collects pyrolysis oil discharged from the oil vapor heat exchange unit 240;
A first pyrolysis oil transfer pump that transfers the pyrolysis oil collected in the pyrolysis oil collection tank to the following pyrolysis oil storage tank;
A pyrolysis oil storage tank storing pyrolysis oil transferred from the first pyrolysis oil transfer pump; and
A pyrolysis oil injection pump that transfers the pyrolysis oil collected in the pyrolysis oil collection tank to the oil cooling tower below; and
An oil cooling tower that receives the pyrolysis oil transferred to the pyrolysis oil injection pump, cools it, and then supplies it to the oil vapor heat exchanger on the most upstream side in the oil vapor heat exchange unit 240. Waste synthetic resin with a multi-screw structure, comprising a. Continuous waste synthetic resin pyrolysis treatment facility including an input device.
According to clause 8,
The gas processing unit 260,
a plurality of pyrolysis oil cooling towers that receive pyrolysis gas from the oil vapor heat exchange unit 240 and cool it in a multi-stage manner;
an oil-water separator that receives pyrolysis gas from the pyrolysis oil cooling tower and separates oil and water;
A gas blower for transporting one or more gas storage tanks that sucks pyrolysis gas from the oil-water separator and supplies it to the following gas storage tank;
a gas storage tank that stores gas sucked by the gas blower for transporting the gas storage tank; and
A gas burner gas supply tank that receives gas from the gas storage tank and stores the gas to be supplied to the gas burner included in the pyrolysis processing unit 220; inputting waste synthetic resin with a multi-screw structure applied thereto. A continuous waste synthetic resin pyrolysis treatment facility including a device.