High-temperature solid material extrusion-type sealed discharging device and thermal cracking equipment containing the same

Abstract

The present invention proposes a high-temperature solid material extrusion-type sealed discharging device and a thermal cracking device containing the same, which belongs to the technical field of thermal cracking device discharging. The extrusion-type sealed discharging device has good extrusion sealing effect and small size, and can timely adjust the material feeding according to the material level of the extrusion sealing section. The extrusion-type sealed discharging device includes a cabin, one side of which is provided with a thermal cracking kettle connection port; the bottom of the cabin is connected to a discharging buffer cylinder, the top of the discharging buffer cylinder is open and connected to the interior of the cabin, and the bottom of the discharging buffer cylinder is provided with a discharging port; a pressing component is provided in the cabin, and the pressing component includes a material extrusion plate; the pressing component is connected to a driving member for driving the material extrusion plate to perform periodic motion, and a periodic motion of the material extrusion plate sequentially includes a descending motion from the cabin to the discharging buffer cylinder, an extrusion motion of reciprocating motion in the discharging buffer cylinder to compact the material, and an ascending motion returning to the cabin; the driving member is also connected to a PLC controller.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal cracking equipment discharging, and in particular relates to a high-temperature solid material extrusion-type sealed discharging device and a thermal cracking equipment comprising the same. Background Art

[0002] The technology of thermal cracking waste rubber and plastic is to use the hot flue gas generated by burning various industrial waste oils or electric heating devices to heat and decompose waste rubber and plastic in an oxygen-deficient or inert atmosphere to recover gas, oil, solid carbon, steel wire and some chemical products. The solid material discharge of the thermal cracking kettle must be sealed to prevent external air from entering the cracking system and causing high-temperature solid materials to spontaneously combust, or even cause safety problems for the entire equipment.

[0003] At present, the discharge of high-temperature solid materials in traditional waste rubber and plastic thermal cracking kettles adopts the method of feeding screw and valve sealing. Among them, the feeding screw uses the material's own properties for extrusion sealing, and its extrusion effect cannot reach a very tight state. Traditional valves such as knife gate valves or ordinary gate valves are usually unable to withstand high temperatures due to their sealing form limitations. Therefore, it is usually necessary to set up multi-stage feeding screws to gradually cool down the solid materials, and set a valve at the discharge port of the last stage feeding screw, which also makes the discharge device bulky and occupies more space.

[0004] At the same time, for extrusion seal discharging, timely understanding of the material level of the extrusion seal section helps to adjust the material delivery in time to prevent blockage. However, the temperature of the solid material produced after thermal cracking is as high as 350-400℃, and the conventional material level meter cannot effectively and accurately monitor the material accumulation in the extrusion seal section.

[0005] Therefore, how to provide an extrusion-type sealing discharging device with good extrusion sealing effect and small size suitable for sealing and discharging high-temperature solid materials is a technical problem that urgently needs to be solved. Summary of the invention

[0006] In view of the above-mentioned technical problems, the present invention proposes a high-temperature solid material extrusion-type sealing discharging device, which can be used for the sealing discharging of high-temperature solid materials, has good extrusion sealing effect and small volume, and the thermal cracking equipment containing it can adjust the material feeding in time according to the material level of the extrusion sealing section.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides a high-temperature solid material extrusion-type sealed discharge device, comprising a cabin; a side wall of one side of the cabin is provided with a thermal cracking kettle connection port for sealingly connecting with a discharge port at one axial end of the thermal cracking kettle; a discharge buffer cylinder is connected to the bottom of the cabin, the discharge buffer cylinder is a straight cylinder, and the top of the discharge buffer cylinder is open and communicated with the interior of the cabin, and a discharge port is provided at the bottom of the discharge buffer cylinder; a material pressing component is provided in the cabin, the material pressing component comprises a material extrusion plate, the bottom surface shape of the material extrusion plate matches the open shape of the top of the discharge buffer cylinder; the material pressing component is connected to a material pressing plate for driving A driving member drives the material extrusion plate to perform periodic motion, wherein one periodic motion of the material extrusion plate sequentially includes a descending motion from the cabin body to the inside of the discharge buffer cylinder along the axial direction of the discharge buffer cylinder, a reciprocating motion in the discharge buffer cylinder to compact the material, and an ascending motion returning to the cabin body; the extrusion-type sealing discharge device also includes a PLC controller for controlling the periodic motion of the material extrusion plate, and the PLC controller is connected to the driving member to receive the current displacement of the material extrusion plate fed back by the driving member, and control the driving member according to the current displacement.

[0009] Preferably, the bottom surface of the material extrusion plate is a plane, and the top surface of the material extrusion plate is an inclined surface sloping from top to bottom from the middle to the edge.

[0010] Preferably, the material pressing assembly also includes a pressing rod connected between the driving member and the material extrusion plate, and the extension direction of the pressing rod is consistent with the movement direction of the material extrusion plate; a guide sleeve is provided in the cabin body for limiting the movement direction of the pressing rod, and the axial direction of the guide sleeve is consistent with the movement direction of the material extrusion plate, and the pressing rod is sleeved in the guide sleeve.

[0011] Preferably, the driving member is a hydraulic cylinder or a pneumatic cylinder installed on the outside of the top surface of the cabin body, the piston rod of the hydraulic cylinder or the pneumatic cylinder is extended and retracted along the axial direction of the discharge buffer cylinder, the piston rod is connected to the pressing assembly, and the top surface of the cabin body is provided with a mounting hole for the piston rod to pass through, and the piston rod and the mounting hole are sealed by a high-temperature resistant sealing material.

[0012] Preferably, a drive component mounting interface is provided on the top of the cabin body, the drive component mounting interface is sealed with a flange, and the mounting hole is opened on the flange.

[0013] Preferably, the high temperature resistant sealing material is selected from any one of flexible graphite packing, oil-free asbestos packing, carbon fiber and silicone rubber sealing ring.

[0014] Preferably, the discharging buffer cylinder is arranged in a vertical direction.

[0015] The present invention also provides a thermal cracking device, comprising a thermal cracking kettle, a high-temperature solid material extrusion-type sealed discharge device as described in any of the above technical solutions, and a feeding device; the thermal cracking kettle connection port of the high-temperature solid material extrusion-type sealed discharge device is sealedly connected to the discharge port at one axial end of the thermal cracking kettle, and the feeding device is connected to the discharge port of the discharge buffer cylinder of the high-temperature solid material extrusion-type sealed discharge device; the PLC controller of the high-temperature solid material extrusion-type sealed discharge device is connected to the feeding device to control the opening and closing of the feeding device according to the current displacement of the material extrusion plate when the extrusion movement is completed.

[0016] Preferably, the method by which the PLC controller controls the opening and closing of the feeding device is: when the current displacement of the material extrusion plate received by the PLC controller when the extrusion movement is completed reaches the set minimum displacement, the PLC controller controls the feeding device to open; when the current displacement of the material extrusion plate received by the PLC controller when the extrusion movement is completed reaches the set maximum displacement, the PLC controller controls the feeding device to close; wherein, the set minimum displacement is the difference between the initial distance of the bottom surface of the material extrusion plate from the bottom surface of the discharging buffer cylinder and the height of the discharging buffer cylinder, and the set maximum displacement is the difference between the initial distance of the bottom surface of the material extrusion plate from the bottom surface of the discharging buffer cylinder and the lowest safe material level of the discharging buffer cylinder.

[0017] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0018] 1. The high-temperature solid material extrusion sealing discharging device provided by the present invention realizes extrusion sealing discharging by cooperating with the material extrusion plate and the discharging buffer cylinder, and has high material compaction degree and good sealing effect. Moreover, the whole discharging device has a compact structure and a small volume;

[0019] 2. In the high-temperature solid material extrusion sealing discharge device provided by the present invention, when compacting the material, the material extrusion plate is in direct contact with the material. Therefore, according to the current displacement of the material extrusion plate when the extrusion movement is completed, combined with the initial distance between the bottom surface of the material extrusion plate and the bottom surface of the discharge buffer cylinder, the material level in the discharge buffer cylinder can be obtained by subtracting the two. The current displacement of the material extrusion plate when the extrusion movement is completed can be obtained from the current displacement of the material extrusion plate fed back to the PLC controller by the driving member, that is, the material level of the extrusion sealing section in the discharge buffer cylinder is indirectly monitored;

[0020] 3. The high-temperature solid material extrusion sealing discharging device provided by the present invention has fewer moving parts and less energy consumption, which is beneficial to saving production costs;

[0021] 4. The thermal cracking equipment provided by the present invention realizes the sealed discharge of the thermal cracking kettle through the high-temperature solid material extrusion sealed discharge device. At the same time, the PLC controller of the high-temperature solid material extrusion sealed discharge device controls the opening and closing of the feeding device according to the current displacement of the material extrusion plate when the extrusion movement is completed, thereby realizing timely regulation of the feeding of the feeding device according to the height of the extrusion sealing section, which can avoid blockage caused by excessive accumulation of the extrusion sealing section and ensure sealing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a high-temperature solid material extrusion-type sealed discharging device provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 A schematic diagram of the structure of a thermal cracking device provided in an embodiment of the present invention;

[0025] In the above figures: 1. Extrusion-type sealing discharging device; 11. Cabin; 111. Thermal cracking kettle connection port; 112. Drive component installation interface; 113. Guide sleeve; 114. Flange; 115. High temperature resistant sealing material; 12. Discharging buffer cylinder; 13. Pressing assembly; 131. Material extrusion plate; 132. Pressing rod; 14. Hydraulic cylinder; 141. Piston rod; 2. Thermal cracking kettle; 3. Feeding device. DETAILED DESCRIPTION

[0026] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0027] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "top", "bottom" and the like indicate directions or positional relationships based on the attached Figure 1 The positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] like Figure 1As shown, the embodiment of the present invention relates to a high-temperature solid material extrusion type sealed discharge device 1, comprising a cabin 11; a side wall of the cabin 11 is provided with a thermal cracking kettle connection port 111 for sealingly connecting to a discharge port at one axial end of a thermal cracking kettle 2; a discharge buffer cylinder 12 is connected to the bottom of the cabin 11, the discharge buffer cylinder 12 is straight-cylindrical, and the top of the discharge buffer cylinder 12 is open and communicated with the interior of the cabin 11, and a discharge port is provided at the bottom of the discharge buffer cylinder 12; a material pressing component 13 is provided in the cabin 11, and the material pressing component 13 includes a material extrusion plate 131, and the bottom surface shape of the material extrusion plate 131 matches the open shape of the top of the discharge buffer cylinder 12 The material pressing component 13 is connected with a driving member for driving the material extrusion plate 131 to perform periodic motion. One periodic motion of the material extrusion plate 131 sequentially includes a descending motion from the cabin body 11 to the inside of the material extrusion buffer cylinder 12 along the axial direction of the material extrusion buffer cylinder 12, a reciprocating motion in the material extrusion buffer cylinder 12 to compact the material, and an ascending motion returning to the cabin body 11. The extrusion type sealing discharge device 1 also includes a PLC controller for controlling the periodic motion of the material extrusion plate 131. The PLC controller is connected to the driving member to receive the current displacement of the material extrusion plate 131 fed back by the driving member, and control the driving member according to the current displacement.

[0029] The working principle of the above-mentioned high-temperature solid material extrusion-type sealed discharging device 1 is as follows: the high-temperature solid material generated by thermal cracking is sent into the cabin 11 of the extrusion-type sealed discharging device 1 through the discharging port of the thermal cracking kettle 2, and then falls into the discharging buffer cylinder 12 at the bottom of the cabin 11, and gradually accumulates in the discharging buffer cylinder 12. At this time, the material extrusion plate 131 is driven by the driving member to descend from the cabin 11 to the discharging buffer cylinder 12 along the axial direction of the discharging buffer cylinder 12, so as to press the high-temperature solid material into the discharging buffer cylinder 12 through the material extrusion plate 131, and then, the material extrusion plate 131 is driven by the driving member to make reciprocating motion in the discharging buffer cylinder 12 to compact the material and realize extrusion sealing. Finally, the material extrusion plate 131 is driven by the driving member to return to the cabin 11 to facilitate the next cycle of material pressing movement; the high-temperature solid material pressed into the discharging buffer cylinder 12 finally falls out from the discharging port set at the bottom of the discharging buffer cylinder 12 to complete the discharging. It should be noted that the driving of the material extrusion plate 131 by the driving member is controlled by a set PLC controller. The program for the PLC controller to perform the above control actions can be written by those skilled in the art based on common knowledge in the art and will not be elaborated here.

[0030] The above-mentioned high-temperature solid material extrusion-type sealed discharging device 1 realizes extrusion-sealed discharging by cooperating with the discharging buffer cylinder 12 through the material extrusion plate 131 provided, and has a high material compaction degree and a good sealing effect. Moreover, the entire extrusion-type sealed discharging device 1 has a compact structure and a small volume. At the same time, in the above-mentioned high-temperature solid material extrusion-type sealed discharging device 1, when compacting the material, the material extrusion plate 131 is in direct contact with the material. Therefore, according to the current displacement of the material extrusion plate 131 when the extrusion movement is completed, combined with the initial distance between the bottom surface of the material extrusion plate 131 and the bottom surface of the discharging buffer cylinder 12, the material level in the discharging buffer cylinder 12 can be obtained by making a difference between the two. The current displacement of the material extrusion plate 131 when the extrusion movement is completed can be obtained from the current displacement of the material extrusion plate 131 fed back to the PLC controller by the driving member, that is, the monitoring of the material level of the extrusion sealing section in the discharging buffer cylinder 12 is indirectly realized. In addition, in the above-mentioned high-temperature solid material extrusion-type sealed discharging device 1, there are fewer moving parts and less energy consumption, which is conducive to saving production costs.

[0031] like Figure 1 As shown, in this embodiment, the discharge buffer cylinder 12 is arranged along the vertical direction. Such arrangement of the discharge buffer cylinder 12 is conducive to the high-temperature solid materials falling directly into the discharge buffer cylinder 12.

[0032] In the above-mentioned high-temperature solid material extrusion type sealed discharge device 1, the material pressing component 13 is used to extrude the material, and the material extrusion plate 131 in the material pressing component 13 is in direct contact with the material. Figure 1 As shown, in this embodiment, the bottom surface of the material extrusion plate 131 is a plane, and the top surface of the material extrusion plate 131 is an inclined surface that slopes downward from the middle to the edge. The bottom surface and the top surface of the material extrusion plate 131 are arranged in this way, which can not only ensure the extrusion effect on the material, but also prevent the material from accumulating on the material extrusion plate 131 and causing the solid powder material to fly.

[0033] Furthermore, in order to prevent the material squeezing plate 131 from deflecting during the descending and ascending movements, it is ensured that the material squeezing plate 131 can accurately enter the discharge buffer cylinder 12 to squeeze the material. Figure 1 As shown, in this embodiment, the material pressing assembly 13 further includes a pressing rod 132 connected between the driving member and the material extrusion plate 131, and the extension direction of the pressing rod 132 is consistent with the movement direction of the material extrusion plate 131; a guide sleeve 113 for limiting the movement direction of the pressing rod 132 is provided in the cabin 11, and the axial direction of the guide sleeve 113 is consistent with the movement direction of the material extrusion plate 131, and the pressing rod 132 is sleeved in the guide sleeve 113. In this embodiment, the guide sleeve 113 is provided to cooperate with the pressing rod 132, so as to realize the effective control of the movement direction of the material extrusion plate 131.

[0034] In order to facilitate the driving of the material squeezing plate 131 to perform the above-mentioned periodic motion between the cabin 11 and the discharge buffer cylinder 12, and to avoid the influence of high temperature on the driving member, as a preferred embodiment, Figure 1 and Figure 2 As shown, in this embodiment, the driving member is a hydraulic cylinder 14 installed on the outside of the top surface of the cabin 11, and the piston rod 141 of the hydraulic cylinder 14 is extended and retracted along the axial direction of the discharge buffer cylinder 12. The piston rod 141 is connected to the material pressing assembly 13. The top surface of the cabin 11 is provided with a mounting hole for the piston rod 141 to pass through, and the piston rod 141 and the mounting hole are sealed by a high-temperature resistant sealing material 115. Through the extension and retraction of the piston rod 141 of the hydraulic cylinder 14, the material extrusion plate 131 can be driven to move up and down along the axial direction of the discharge buffer cylinder 12 to complete the above-mentioned periodic motion. Moreover, in this embodiment, the piston rod 141 of the hydraulic cylinder 14 is sealed with the mounting hole provided on the top surface of the cabin 11 by the high-temperature resistant sealing material 115, which can ensure sealing. Preferably, the high-temperature resistant sealing material 115 is selected from any one of flexible graphite packing, oil-free asbestos packing, carbon fiber and silicone rubber sealing ring. It should be noted that when the hydraulic cylinder 14 is used as the driving member, the current displacement of the material extrusion plate 131 fed back by the driving member to the PLC controller is the current extension of the piston rod 141 of the hydraulic cylinder 14. In addition, it is understandable that those skilled in the art can also use a pneumatic cylinder instead of the hydraulic cylinder 14 as the driving member.

[0035] Further, in order to facilitate the installation of the hydraulic cylinder 14, as Figure 1 and Figure 2 As shown, a driver installation interface 112 is provided on the top of the cabin 11, and the driver installation interface 112 is sealed and connected with a flange 114, and a mounting hole is provided on the flange 114. During installation, the hydraulic cylinder 14 is first installed on the flange 114, and then the flange 114 is installed on the driver installation interface 112. Moreover, when the high temperature resistant sealing material 115 needs to be replaced, the flange 114 can be removed, which is convenient for installation and maintenance.

[0036] In addition, if Figure 3 As shown, an embodiment of the present invention further provides a thermal cracking device, including a thermal cracking kettle 2, the above-mentioned high-temperature solid material extrusion-type sealed discharge device 1, and a feeding device 3; the thermal cracking kettle connection port 111 of the high-temperature solid material extrusion-type sealed discharge device 1 is sealed and connected to the discharge port at one axial end of the thermal cracking kettle 2, and the feeding device 3 is connected to the discharge port of the discharge buffer cylinder 12 of the high-temperature solid material extrusion-type sealed discharge device 1; the PLC controller of the high-temperature solid material extrusion-type sealed discharge device 1 is connected to the feeding device 3 to control the opening and closing of the feeding device 3 according to the current displacement of the material extrusion plate 131 when the extrusion movement is completed.

[0037] In the above-mentioned thermal cracking equipment, the method by which the PLC controller controls the opening and closing of the feeding device 3 is as follows: when the current displacement of the material extrusion plate 131 received by the PLC controller when the extrusion movement is completed reaches the set minimum displacement, the PLC controller controls the feeding device 3 to open; when the current displacement of the material extrusion plate 131 received by the PLC controller when the extrusion movement is completed reaches the set maximum displacement, the PLC controller controls the feeding device 3 to close; wherein, the set minimum displacement is the difference between the initial distance between the bottom surface of the material extrusion plate 131 and the bottom surface of the discharge buffer cylinder 12 and the height of the discharge buffer cylinder 12; the set maximum displacement is the difference between the initial distance between the bottom surface of the material extrusion plate 131 and the bottom surface of the discharge buffer cylinder 12 and the minimum safe material level of the discharge buffer cylinder. It should be noted that the minimum safe material level of the discharge buffer cylinder refers to the minimum material level of the discharge buffer cylinder 12 required to ensure sealing.

[0038] It should be noted that, in the present invention, the feeding device 3 is not limited to Figure 3 The spiral feeding device shown in the figure can also be used by those skilled in the art with other types of feeding devices, as long as the material outputted by the high-temperature solid material extrusion-type sealed discharging device 1 can be transported to subsequent equipment.

[0039] The above-mentioned thermal cracking equipment realizes the sealed discharge of the thermal cracking kettle 2 through the high-temperature solid material extrusion sealed discharge device 1. At the same time, the PLC controller of the high-temperature solid material extrusion sealed discharge device 1 controls the opening and closing of the feeding device 3 according to the current displacement of the material extrusion plate 131 when the extrusion movement is completed, and realizes timely regulation of the feeding of the feeding device 3 according to the height of the extrusion sealing section, which can avoid blockage caused by excessive accumulation of the extrusion sealing section and ensure sealing safety.

Claims

1. High-temperature solid material extrusion sealing discharge device, characterized by: It comprises a cabin; one side wall of the cabin is provided with a thermal cracking kettle connection port for sealingly connecting to a discharge port at one axial end of the thermal cracking kettle; a discharge buffer cylinder is connected to the bottom of the cabin, the discharge buffer cylinder is a straight cylinder, the discharge buffer cylinder is arranged in a vertical direction, and the top of the discharge buffer cylinder is open and communicated with the interior of the cabin, and a discharge port is arranged at the bottom of the discharge buffer cylinder; a material pressing assembly is arranged in the cabin, the material pressing assembly comprises a material extrusion plate, the bottom surface shape of the material extrusion plate matches the open shape of the top of the discharge buffer cylinder; the material pressing assembly is connected to a driving member for driving the material extrusion plate to perform periodic motion, and one periodic motion of the material extrusion plate sequentially comprises self-movement along the axial direction of the discharge buffer cylinder The cabin body descends into the discharge buffer cylinder, performs a reciprocating motion in the discharge buffer cylinder to compact the material, and performs an ascending motion returning to the cabin body; the extrusion-type sealing discharge device also includes a PLC controller for controlling the periodic motion of the material extrusion plate, and the PLC controller is connected to the driving member to receive the current displacement of the material extrusion plate fed back by the driving member, and controls the driving member according to the current displacement; the PLC controller obtains the material level in the discharge buffer cylinder by subtracting the current displacement of the material extrusion plate when the extrusion motion is completed, combined with the initial distance between the bottom surface of the material extrusion plate and the bottom surface of the discharge buffer cylinder, so as to monitor the material level of the extrusion sealing section in the discharge buffer cylinder.

2. The high-temperature solid material extrusion sealing discharge device according to claim 1 is characterized in that: The bottom surface of the material extrusion plate is a plane, and the top surface of the material extrusion plate is an inclined surface that slopes from top to bottom from the middle to the edge.

3. The high-temperature solid material extrusion sealing discharge device according to claim 1 is characterized in that: The material pressing assembly also includes a pressing rod connected between the driving member and the material extrusion plate, and the extension direction of the pressing rod is consistent with the movement direction of the material extrusion plate; a guide sleeve is provided in the cabin body for limiting the movement direction of the pressing rod, and the axial direction of the guide sleeve is consistent with the movement direction of the material extrusion plate, and the pressing rod is sleeved in the guide sleeve.

4. The high-temperature solid material extrusion sealing discharge device according to claim 1, characterized in that: The driving member is a hydraulic cylinder or a pneumatic cylinder installed on the outside of the top surface of the cabin body. The piston rod of the hydraulic cylinder or the pneumatic cylinder is retracted and extended along the axial direction of the discharge buffer cylinder. The piston rod is connected to the pressing assembly. The top surface of the cabin body is provided with a mounting hole for the piston rod to pass through. The piston rod and the mounting hole are sealed by a high-temperature resistant sealing material.

5. The high-temperature solid material extrusion sealing discharge device according to claim 4 is characterized in that: A drive component mounting interface is provided on the top of the cabin body, the drive component mounting interface is sealed and connected with a flange, and the mounting hole is opened on the flange.

6. The high-temperature solid material extrusion sealing discharge device according to claim 4, characterized in that: The high temperature resistant sealing material is selected from any one of flexible graphite packing, oil-free asbestos packing, carbon fiber and silicone rubber sealing ring.

7. A thermal cracking device, characterized in that: It comprises a thermal cracking kettle, a high-temperature solid material extrusion-type sealed discharge device as described in any one of claims 1 to 6, and a feeding device; the thermal cracking kettle connection port of the high-temperature solid material extrusion-type sealed discharge device is sealedly connected to the discharge port at one axial end of the thermal cracking kettle, and the feeding device is connected to the discharge port of the discharge buffer cylinder of the high-temperature solid material extrusion-type sealed discharge device; the PLC controller of the high-temperature solid material extrusion-type sealed discharge device is connected to the feeding device to control the opening and closing of the feeding device according to the current displacement of the material extrusion plate when the extrusion movement is completed.

8. The thermal cracking device according to claim 7, characterized in that: The method for the PLC controller to control the opening and closing of the feeding device is: when the current displacement of the material extrusion plate received by the PLC controller when the extrusion movement is completed reaches the set minimum displacement, the PLC controller controls the feeding device to open; when the current displacement of the material extrusion plate received by the PLC controller when the extrusion movement is completed reaches the set maximum displacement, the PLC controller controls the feeding device to close; wherein, the set minimum displacement is the difference between the initial distance between the bottom surface of the material extrusion plate and the bottom surface of the discharging buffer cylinder and the height of the discharging buffer cylinder, and the set maximum displacement is the difference between the initial distance between the bottom surface of the material extrusion plate and the bottom surface of the discharging buffer cylinder and the lowest safe material level of the discharging buffer cylinder.

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