JP2007211096A - Pyrolysis facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide pyrolysis equipment which can charge an object to be treated into a pyrolysis furnace stably and also safely at all times. <P>SOLUTION: The pyrolysis equipment is the one which charges the object to be treated into the pyrolysis furnace with a charging apparatus to carry out the pyrolysis treatment. The charging apparatus is equipped with a charge hopper which stores the treated object to a predetermined height of stack and a charging mechanism which is communicant with the lower part of this charge hopper, has a compression section to perform compression while transferring the treated object stored in the hopper, and charges the treated object compressed in this compression section into the pyrolysis furnace. By the stacking part of the treated object in the charge hopper and the compression section for the treated object in the charging mechanism, a material seal is formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a thermal decomposition apparatus for a waste treatment system that treats municipal waste, industrial waste, special waste, and the like containing various materials and shapes that are unsorted and untreated by thermal decomposition.

  Conventionally, as a waste treatment system that processes unsorted and untreated waste containing various pollutants into a usable material, a thermal decomposition treatment system that treats waste by pyrolysis is known. ing. (For example, see Patent Document 1).

  FIG. 4 is a block diagram showing an example of such a thermal decomposition processing system. In FIG. 4, an object to be processed 61 such as waste is supplied into a pyrolysis furnace 64 by a waste supply apparatus 63 via a pretreatment apparatus 62, and is pyrolyzed in the pyrolysis furnace 64. The organic polymer gas generated by the thermal decomposition in the pyrolysis furnace 64 is reformed by the gas reformer 65 to become a low-molecular combustible gas, and is purified by the gas purification device 66 to be converted into the reformed gas 67. Become. The reformed gas 67 is reused as an energy source in the thermal decomposition processing system. On the other hand, the residue generated in the pyrolysis furnace 64 is discharged to the outside by a residue discharging device 68, and sorted and granulated by a granulating device 69 to be recycled 70.

  Here, as the pyrolysis furnace 64 in FIG. 4, for example, an externally heated rotary kiln that heats the rotary drum from the outside is generally used. FIG. 5 shows the externally heated rotary kiln 71 and the equipment configuration adjacent thereto. In FIG. 5, a waste input device 73 (see, for example, Patent Document 2) is disposed on the entrance side of the rotary drum 72 of the externally heated rotary kiln 71. Waste is supplied to

  On the other hand, an outlet hood 74 is disposed on the outlet side of the rotary drum 72, and the waste thermally decomposed in the rotary drum 72 is separated into a pyrolysis gas 75 and a pyrolysis residue 76 by the outlet hood 74. And discharged. The pyrolysis gas 75 is sent to the gas reformer (cracker) 65 through the connecting gas pipe 77 and subjected to gas reforming treatment. On the other hand, the pyrolysis residue 76 is sent to a residue discharge device 68.

A cylindrical rotating drum 72 is rotatably supported by a support roller 78. The rotating drum 72 is housed in the combustion chamber 79 and is heated by the burner 80 from the outside heat.
JP 2000-202419 A JP 2001-279264 A

  By the way, the waste to be treated includes various substances and has various shapes. For this reason, in particular, a clogged state due to tangling of waste may occur in the input portion of the pyrolysis furnace, which may be a problem in stable operation of the pyrolysis furnace. In addition, air may flow from the charging device into the pyrolysis furnace, and the thermal decomposition performance may be reduced, or may ignite in the pyrolysis furnace and reach an abnormally high temperature. Furthermore, there is a possibility that the backflow gas leaks to the outside air.

  An object of the present invention is to provide a thermal decomposition apparatus capable of always stably and safely throwing a workpiece into a thermal decomposition furnace.

  A thermal decomposition facility according to the present invention is a thermal decomposition facility that performs a thermal decomposition process by putting an object to be processed into a pyrolysis furnace using an input device, and the input device is configured to bring the object to be processed to a predetermined stacking height. A charging hopper that is stored, and a compression portion that communicates with a lower portion of the charging hopper and compresses the processing object stored in the hopper, and compresses the processing object compressed in the compression portion. And a charging mechanism for charging into the furnace, and a material seal is formed by the layered portion of the workpiece in the charging hopper and the compressed portion of the workpiece in the charging mechanism.

  In the present invention, the charging mechanism communicates with the lower part of the charging hopper and is provided with a screw mechanism for conveyance in the direction of the internal axis, and the peripheral sectional area on the downstream side of the screw mechanism is reduced to form a compression portion. A cylinder part is provided.

  In the present invention, the stack height control means for controlling the stack height of the workpiece in the charging hopper is controlled according to the detection result. It is good to provide.

  Further, in the present invention, the stack height control means controls the input speed of the object to be processed by the input mechanism according to the detection result of the stack height detection means.

  Further, in the present invention, a gas injection path is formed in the main shaft of the screw mechanism from one end outside the input mechanism to the compression portion in the input mechanism and opens to the inside of the compression portion. One end outside the charging mechanism is connected to a nitrogen gas supply device, and nitrogen gas may be supplied from the nitrogen gas connection device through the gas injection path into the compression section.

  Further, in the present invention, the flow rate or pressure of nitrogen gas supplied from the nitrogen gas supply device through the gas injection path is measured, and when this measured value changes beyond the set value compared to the normal time, the screw of the compression portion is It is preferable to provide an emergency stop means that determines that the object to be processed does not exist around the shaft and is in a spatial state, and stops the input mechanism urgently.

  Further, in the present invention, the CO concentration in the charging hopper is measured, and when this CO concentration rises beyond the set value compared to the normal time, there is no object to be processed around the screw shaft of the compressed portion and the space state It is good to provide the emergency stop means which judges that it has become, and makes an input mechanism stop urgently.

  Further, in the present invention, an emergency shutter that is normally open is provided in the communication path between the outlet side of the compression portion of the charging mechanism and the charging portion into the pyrolysis furnace, and the emergency stop means is used when the charging mechanism is in an emergency stop. The emergency shutter may be closed to close the communication path.

  Furthermore, in this invention, you may provide the monitoring camera which can visually recognize the state of the to-be-processed object in a charging hopper.

  According to the present invention, a material seal is formed by the laminated portion of the workpieces in the charging hopper and the compressed portion of the workpieces in the charging mechanism. Leakage can be reduced, and furthermore, since the state in which the pyrolysis gas flows backward can be prevented, the object to be treated can be always stably and safely put into the pyrolysis furnace.

  Hereinafter, an embodiment of a thermal decomposition apparatus according to the present invention will be described in detail with reference to the drawings.

  In FIG. 1, the charging device 2 is shown in detail, particularly in the pyrolysis equipment in which the workpiece 1 is charged into the thermal decomposition furnace 30 by the charging device 2 and subjected to the thermal decomposition treatment.

  The charging device 2 includes a charging hopper 13 and a charging mechanism, and the charging mechanism includes a first charging mechanism 10 and a second charging mechanism 20.

  The charging hopper 13 stores the workpiece 1 at a predetermined stacking height, and the workpiece 1 in the separately provided storage hopper 17 is fed at a constant flow rate by the quantitative feeder 18 and the transport conveyor 19. The The charging mechanism compresses the workpiece 1 stored in the charging hopper 13 while transporting it, and feeds the compressed workpiece 1 into the rotary drum 30a of the pyrolysis furnace 30. The charging mechanism 10 and the second charging mechanism 20 are configured.

  The first charging mechanism 10 has a cylinder part 11 communicating with the lower part of the charging hopper 13, and a conveying screw mechanism 12 provided along the axial direction inside the cylinder part 11. The cylinder part 11 and the screw mechanism 12 are configured sideways as shown in the figure, and the peripheral cross-sectional area is reduced in the right side part of the cylinder part 11 in the figure, that is, the downstream part in the conveying direction by the screw mechanism 12. A compressed portion 11a of the workpiece 1 is formed.

  The second charging mechanism 20 is provided between the outlet side of the first charging mechanism 10 and the rotary drum 30 a of the pyrolysis furnace 30. That is, it has the side cylinder part 21 which communicates through the exit part of the compression part 11a of the cylinder part 11 which comprises the 1st injection | throwing-in mechanism 10, and the vertical communication path 11b. In the cylinder part 21, a screw mechanism 22 for conveyance is provided in the axial direction.

  The screw mechanism 12 provided in the first input mechanism 10 includes a screw main shaft 12a integrally attached with a screw blade 12b, and a drive unit 12c that rotates the screw main shaft 12a. The screw main shaft 12a is rotatably supported at one end of the cylinder portion 11 through a seal portion 12d that also serves as a bearing. The drive unit 12 c includes a motor that can be controlled at a variable speed by the inverter 16 and a gear mechanism that connects the motor and the screw main shaft 12 a, and is provided outside the cylinder unit 11.

  As described above, the cylinder portion 11 is provided with the compression portion 11a having a shape in which the peripheral cross-sectional area is narrowed on the downstream side in the transfer direction of the workpiece 1. The compression portion 11a compresses the workpiece 1 while conveying the workpiece 1 to the right in the drawing by the rotation of the screw blade 12b. Further, the screw blade 12 b corresponding to the compression portion 11 a has a tapered shape toward the transfer direction (right side in the drawing) of the workpiece 1 in accordance with the shape of the cylinder portion 11.

  A material seal is formed by the workpiece 1 compressed by the compression portion 11a and the workpiece 1 stacked in the charging hopper 13, and the outside air enters the pyrolysis furnace 30 or the pyrolysis furnace. The backflow of the pyrolysis gas from 30 is prevented.

  As described above, the second input mechanism 20 also includes the cylinder portion 21 and the screw mechanism 22 that is rotatably provided in the cylinder portion 21. The screw mechanism 22 includes a screw main shaft 22a integrally attached with screw blades 22b, and a drive unit 22c that rotates the screw main shaft 22a. The screw main shaft 22 is rotatably supported at one end portion of the cylinder portion 21 through a seal portion 22d that also serves as a bearing. The drive unit 22 c includes a motor and a gear mechanism that connects the motor and the screw main shaft 22 a, and is provided outside the cylinder unit 21. The other end of the cylinder 21 is connected to the rotary drum 30a of the pyrolysis furnace 30 in an airtight and rotatable manner by a seal portion 32.

  An emergency shutter 31 is provided above the cylinder portion 21 of the second input mechanism 20, that is, in an intermediate portion of the communication path 11 b with the first input mechanism 10. The emergency shutter 31 is configured to be normally open, and closes to close the communication passage 11b during an emergency stop, which will be described later, of the charging mechanisms 10 and 20, and backflow of pyrolysis gas from the pyrolysis furnace 30 side. To prevent.

  In addition, nitrogen gas is sealed in the compressed portion 11a of the workpiece 1 in the first charging mechanism 10, and air mixed in the workpiece 1 is caused to flow backward to reduce air leakage from the outside. Yes. As a configuration for this purpose, in the screw main shaft 12a, gas injection passages 34 and 35 are formed which reach from the one end (the left end in the drawing) located outside to the compression portion 11a and open to the inside of the compression portion 11a. One end (the left end in the figure) of the gas injection paths 34 and 35 is connected to a nitrogen gas supply device 36, and nitrogen gas is supplied from the nitrogen gas connection device 36 through the gas injection paths 34 and 35 into the compression portion 11 a.

  That is, the rotatable coupling 33 is provided at the drive side shaft end portion of the screw main shaft 12a. Further, the screw shaft 12a is provided with a passage portion 34 extending in the axial direction to the compression portion 11a and an injection port 35 opening radially at the tip thereof as the gas injection path. Nitrogen gas is supplied from the supply device 36 through the flow meter 37 to the gas injection passages 34 and 35 through the rotatable coupling 33. Thus, since nitrogen is injected to the compression part 11a of the to-be-processed object 1, the air mixed into the to-be-processed object 1 is made to flow backward, and the leakage of the air from the outside is reduced.

  The charging hopper 13 is provided with a stacking height detecting means 14 for the workpiece 1 inside. For example, a non-contact ultrasonic height sensor (hereinafter referred to as a height sensor 14) is used as the stacked height detection unit 14, and the upper surface of the input hopper 13 in which the workpiece 1 is accumulated is used. Installed to face each other.

  The measurement result of the height sensor 14 is sent to the central control means 15 and input to the stack height control means 15a configured in the central control means 15. This stacking height control means 15a controls the input speed of the workpiece 1 to the pyrolysis furnace 30 according to the detection result of the stacking height detection means 14, and the processing target is determined based on the detection result of the height sensor 14. The rotational speed of the screw mechanism 12 is controlled so that the stacking height of the objects 1 is within a predetermined range. That is, as shown in FIG. 2, a stacked height detection circuit 41 that responds to a measurement signal from the height sensor 14, a spike waveform truncation processing circuit 42 included in the measurement signal, and a moving average process that shapes the measurement waveform A circuit 43 and an arithmetic circuit 44 for calculating the shaft rotational speed of the first screw mechanism 12 from the measured waveform are included. Then, the inverter 16 is controlled by the calculation result of the calculation circuit 44, and the conveying speed by the screw mechanism 12 is changed.

  In addition, the central controller 15 is provided with an emergency stop means 15b for stopping the charging mechanism in an emergency depending on the CO concentration in the charging hopper 13 or the abnormal supply state of the nitrogen gas.

  Here, a sensor 38 is provided in the charging hopper 13, and the CO concentration detected by the sensor 38 is measured by a CO concentration meter 39. The emergency stop means 15b is in a space state when the CO concentration increases beyond the set value compared to the normal time, and there is no object to be processed around the screw main shaft 12a of the compressed portion 11a ( It is determined that the material seal is not functioning) and the loading mechanism is stopped urgently.

  Further, the emergency stop means 15 b inputs the flow rate of the nitrogen gas supplied from the nitrogen gas supply device 36 from the measured value of the flow meter 37. Then, when this measured value greatly increases beyond the set value compared to the normal time, it is determined that the workpiece 1 does not exist around the screw main shaft 12a of the compressed portion 11a and is in a spatial state. The charging mechanism 3 is stopped urgently.

  The detection of the abnormal supply state of nitrogen gas may be detected not only by increasing the supply flow rate described above but also by measuring the supply pressure of nitrogen gas and greatly decreasing it.

  Further, the charging hopper 13 is provided with a monitoring camera 40 that can visually check the state of the workpiece 1 in the charging hopper 13, and the state is displayed on a monitor (not shown) of the central monitoring control device 15.

  Next, the operation of such a thermal decomposition apparatus will be described. First, according to the processing amount instructed by the central control device 15, the fixed amount of the processing object 1 is cut out from the storage hopper 17 by the fixed amount feeder 18 and sent to the input hopper 13 by the transport conveyor 19. The workpiece 1 accumulated in the charging hopper 13 is sent rightward in the drawing by the screw mechanism 12 of the first charging mechanism 10 and compressed by the compression portion 11a. By this compression, it is cut out while ensuring sufficient airtightness and sent to the second input mechanism 20.

  At this time, nitrogen gas is supplied at a constant pressure from the nitrogen gas supply device 36 through the flow meter 37 to the gas injection passages 34 and 35 of the screw shaft 12a by the rotatable coupling 33. This nitrogen gas is injected into the inside of the compression portion 11a through a passage portion 34 constituting a gas supply passage and an injection port 35 opening radially ahead. Thus, since nitrogen gas is injected to the compression part 11a of the to-be-processed object 1, the air mixed into the to-be-processed object 1 is made to flow backward, and the leakage of the air from the outside is reduced.

  In the second charging mechanism 20, the screw main shaft 22 a rotates at a sufficiently high speed so that the workpiece 1 sent from the first charging mechanism 10 does not stagnate, and enters the rotary drum 30 a of the pyrolysis furnace 30. The workpiece 1 is charged. The workpiece 1 put into the rotary drum 30a is pyrolyzed inside.

  On the other hand, the stacking amount of the workpiece 1 accumulated in the charging hopper 13 is detected by the height sensor 14 and sent to the central controller 15. The stacking height control means 15a of the central controller 15 performs waveform processing on the detection waveform from the height sensor 14 so as to always keep the stacking height of the workpiece 1 in the charging hopper 13 at a predetermined height. To compute. Then, the rotational speed of the screw mechanism 12 of the first input mechanism 10 is controlled according to the calculation result. In other words, a material seal is formed in this portion by always maintaining the stacking height of the workpiece 1 stored in the charging hopper 13 at a predetermined height, and the workpiece formed in the compression portion 11 a by the screw mechanism 12. The material to be processed 1 is put into the pyrolysis furnace 30 in a state in which ventilation with the outside is cut off with the material seal 1.

  In this way, since the material seal can be formed by the workpiece 1 retained in the charging hopper 13 and the workpiece 1 of the compression portion 11a, the leakage of air from the outside is reduced, and further, thermal decomposition is performed. Gas backflow can be prevented. Therefore, the object to be processed can always be stably and safely put into the pyrolysis furnace 30.

  Here, since the waveform detected by the height sensor 14 includes spike waves and high frequencies, the stacked height control means 15a performs waveform shaping as shown in FIG. That is, the height sensor 14 detects a state in which the workpiece 1 falls or floats in the charging hopper 13 and detects a waveform in which spike-like waveforms 45 and high-frequency waveforms 46 are mixed. Therefore, first, the spike waveform truncation processing circuit 42 shown in FIG. 2 creates a primary processing waveform 47 obtained by discarding the spike-like waveform from this waveform. Next, the moving average processing circuit 43 creates a secondary processing waveform 48 from which high-frequency fine movement waveforms are removed. Using this secondary processing waveform 48, the arithmetic circuit 44 creates a rotational speed control waveform 49 of the first screw spindle 12a, and the inverter 16 controls the conveying speed of the screw mechanism 12 based on this waveform 49.

  In this way, the stacking amount of the workpiece 1 accumulated in the charging hopper 13 is detected by using the height sensor 14, and the detection result is sent to the central controller 15, and the stacking height control means 15a is used in FIG. Perform waveform processing as shown. As a result, the stacking height of the workpieces 1 in the charging hopper 13 is calculated so as to always maintain a predetermined height, and the conveying speed (the charging speed) by the screw mechanism 12 of the first charging mechanism 10, that is, The rotational speed of the screw shaft 12a is controlled. That is, the charging control is performed while forming the material seal of the workpiece 1 stored in the charging hopper 13 and the material seal of the workpiece 1 in the compression portion 11 a of the screw mechanism 12. Therefore, since these material seals can be formed, the leakage of air from the outside can be reduced, and furthermore, the state in which the pyrolysis gas flows backward can be prevented, and the object to be treated can be stably and safely heated. It is possible to provide a thermal cracking furnace apparatus that can be charged into a cracking furnace.

  In the thermal decomposition apparatus of FIG. 1, for example, when the workpiece 1 does not exist around the screw main shaft 12a in the compressed portion 11a and becomes a space, that is, when it does not function as a material seal, the external air can be left as it is. May leak into the pyrolysis furnace 30 and burn in the furnace, or the pyrolysis gas may flow backward to cause a fire in the charging hopper 13. However, in this embodiment, the above situation can be detected and dealt with early.

  That is, when the workpiece 1 does not exist around the screw main shaft 12a in the compression portion 11a and becomes a space, the flow resistance of the nitrogen injection port 35 provided in the screw main shaft 12a decreases, and the nitrogen gas flow rate rapidly increases. Increase. The emergency stop means 15b of the central monitoring control device 15 captures this rapid change in the flow rate, and stops the rotation of the screw spindle 12a and closes the emergency shutter 31 in order to stop the closing mechanism in an emergency. That is, the emergency stop means 15b has an automatic sequence for executing the series of emergency stop processes.

  In this way, the object to be processed 1 disappears around the screw main shaft 12a, and a state in which external air easily leaks or a state in which pyrolysis gas easily flows back is detected at an early stage, and an emergency shutter 31 is executed by an emergency stop process of the input mechanism. Close. For this reason, it is possible to safely take measures to prevent external air leakage and combustion gas backflow.

  In addition, as a method of detecting abnormality from nitrogen gas, you may make it detect not only from the change of flow volume as mentioned above but from the change of the supply pressure of nitrogen gas. That is, when the workpiece 1 does not exist around the screw main shaft 12a and becomes a space, the supply pressure of the nitrogen gas rapidly decreases, and thus the above-described abnormal state can be detected from this rapid decrease in pressure.

  Further, since the CO sensor 38 is provided in the charging hopper 13, the CO in the hopper 13 is detected, and the concentration is measured by the CO concentration meter 39, the abnormal state can be detected from the change in the CO concentration. That is, when the CO concentration in the charging hopper 13 suddenly increases, the pyrolysis gas flows backward from the pyrolysis furnace 30 side. Therefore, the emergency stop means 15b inputs the measurement value of the CO concentration meter 39 and monitors the change thereof, so that the workpiece 1 does not exist around the screw main shaft 11a of the compression portion 11a and becomes a space and is thermally decomposed. Judge that the gas is flowing backward. Then, the emergency shutter 31 is closed at the same time as the rotation of the screw spindle 12a is stopped in order to stop the closing mechanism in an emergency.

  Thus, since the back flow of the pyrolysis gas from the pyrolysis furnace 30 side is detected at an early stage and the emergency shutter 30 is closed, it is possible to take measures to prevent the back flow of the pyrolysis gas and external air leakage.

  Further, in the thermal decomposition apparatus of FIG. 1, a monitoring camera 40 is provided in the charging hopper 13, the presence / absence or stacking height of the workpiece 1 in the charging hopper 13 is photographed, and a monitor (not shown) provided in the central monitoring apparatus 15. It can be displayed in a visible state. In general, when the cut-out state by the screw mechanism 12 becomes abnormal, it is dangerous for a person to approach and look directly at this state, but the monitoring camera 40 can monitor the inside of the closing hopper 13 remotely, so that the abnormal state Can be easily confirmed.

  As described above, since the internal state of the charging hopper 13 can be visually confirmed, it provides effective information for the recovery treatment after the abnormal state of the workpiece 1 in the charging hopper 13.

It is a block diagram which shows one Embodiment of the thermal decomposition apparatus by this invention. It is a block diagram explaining the function of the lamination | stacking height control means in one Embodiment same as the above. It is a system diagram explaining the waveform processing detected by the height sensor in the same embodiment as above. It is a block diagram explaining the function of a general thermal decomposition equipment. It is a block diagram which shows the structure of a general thermal decomposition equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 To-be-processed object 2 Input device 10,20 Input mechanism 11,21 Cylinder part 12,22 Screw mechanism 11a Compression part 13 Input hopper 14 Stack height detection means 15a Stack height control means 15b Emergency stop means 30 Pyrolysis furnace 31 Emergency Shutter 34, 35 Gas supply path 36 Nitrogen gas supply device 37 Nitrogen gas flow meter 38 CO sensor 39 CO concentration meter 40 Surveillance camera

Claims (9)

A thermal decomposition facility for performing a thermal decomposition process by putting an object to be processed into a thermal decomposition furnace with a charging device,
The charging device is
A charging hopper for storing the workpieces at a predetermined stacking height;
A charging portion that communicates with the lower portion of the charging hopper and compresses the workpiece to be processed stored in the hopper while being compressed, and that charges the workpiece compressed in the compressing portion into the pyrolysis furnace. With a mechanism,
A thermal decomposition facility characterized in that a material seal is formed by a layered portion of the workpiece in the charging hopper and a compressed portion of the workpiece in the charging mechanism.   The charging mechanism includes a cylinder portion that communicates with the lower portion of the charging hopper, is provided with a screw mechanism for conveyance in the direction of the internal axis, and has a compression section by reducing the peripheral sectional area on the downstream side of the screw mechanism. The thermal decomposition equipment according to claim 1, wherein   It is characterized by having a stack height detecting means for the workpiece in the charging hopper, and having a stack height control means for controlling the stack height of the workpiece to be within a predetermined range based on the detection result. The pyrolysis equipment according to claim 1.   4. The thermal decomposition equipment according to claim 3, wherein the stack height control means controls the input speed of the object to be processed by the input mechanism according to the detection result of the stack height detection means.   A gas injection path is formed in the main shaft of the screw mechanism from one end outside the input mechanism to the compression portion in the input mechanism, and opens to the inside of the compression portion. One end of the gas injection path outside the input mechanism is The thermal decomposition equipment according to claim 2, wherein the thermal decomposition equipment is connected to a nitrogen gas supply device and is configured to supply nitrogen gas from the nitrogen gas connection device through the gas injection path into the compression section.   Measure the flow rate or pressure of nitrogen gas supplied from the nitrogen gas supply device through the gas injection path, and if this measured value changes beyond the set value compared to the normal value, the object to be processed around the screw shaft of the compressed part The thermal decomposition equipment according to claim 5, further comprising an emergency stop unit that determines that there is no space and is in a space state and stops the charging mechanism in an emergency.   When the CO concentration in the charging hopper is measured and this CO concentration rises above the set value compared to the normal time, it is determined that there is no object to be processed around the screw shaft in the compressed portion and the space is in the state. The pyrolysis equipment according to claim 2, further comprising emergency stop means for emergency stop of the charging mechanism.   An emergency shutter that is normally open is provided in the communication path between the outlet side of the compression portion of the input mechanism and the input portion into the pyrolysis furnace, and the emergency stop means closes the emergency shutter when the input mechanism is in an emergency stop The thermal decomposition equipment according to claim 6 or 7, wherein the communication path is closed.   The pyrolysis equipment according to any one of claims 1 to 8, wherein a monitoring camera capable of visualizing a state of an object to be processed in the charging hopper is provided.

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