A feeding device for a pyrolysis furnace used in the treatment of pyrolysis medical waste

Abstract

This utility model relates to the technical field of medical waste treatment equipment, specifically to a feeding device for a pyrolysis furnace used in the treatment of pyrolysis-type medical waste. The device includes: a sealed feeding shell, a connecting assembly, a pushing module, a heat insulation module, and a negative pressure balancing assembly. The connecting assembly is sealed to the crushing device via a connecting flange, a filter grid intercepts impurities, and a pneumatic sealing gate valve controls the feeding and maintains a closed system. The pushing module's drive motor drives a pushing screw to transport the material. The negative pressure balancing assembly, based on a pressure sensor linked to a vacuum pump, maintains a slight negative pressure inside the shell to prevent leakage and backflow of flue gas. The heat insulation module blocks high temperatures, and an annular electric heating coil at the furnace body's connecting flange preheats the material to remove moisture. A bottom cleaning port facilitates the removal of residues. This device achieves sealed, continuous, and safe feeding of medical waste, solving the problems of poor sealing, insufficient high-temperature resistance, easy clogging, and pressure imbalance in existing devices, ensuring efficient operation of the pyrolysis process.

Description

Technical Field

[0001] This utility model relates to the technical field of medical waste treatment equipment, and more specifically, to a feeding device for a pyrolysis furnace used in the treatment of pyrolysis-type medical waste. Background Technology

[0002] In the pyrolysis treatment of medical waste, the feeding device is a critical node connecting the pretreatment system and the pyrolysis furnace, and its performance directly affects the stability and safety of the overall process. Existing devices generally suffer from sealing defects: due to unreasonable sealing structure design at the connection point with the enclosed pulverizing equipment, it is easy to cause leakage of aerosols or debris containing pathogens, which can disrupt the micro-negative pressure environment of the system and increase the risk of occupational exposure. At the same time, the seals at the connection point with the pyrolysis furnace are prone to failure due to high-temperature aging, which can cause flue gas backflow, violating the core requirement of "harmless" treatment.

[0003] Existing feeding devices lack sufficient high-temperature adaptability and are ill-suited to the 550-800℃ operating environment of pyrolysis furnaces. The feeding end, located near the furnace body, is constantly exposed to high-temperature radiation, making traditional shell materials and sealing structures prone to thermal deformation and aging, leading to seal failure. This not only shortens equipment lifespan but also poses safety hazards due to the leakage of high-temperature flue gas, failing to meet the requirements for continuous and stable operation. The continuity of material conveying and pressure balance are equally problematic. Pre-treated medical waste is prone to agglomeration, and existing pushing structures lack specific design features, frequently resulting in jamming and interruptions. Furthermore, the lack of a precise pressure control mechanism leads to conflicts between the positive pressure of the pyrolysis furnace and the system's slight negative pressure, causing material backflow or negative pressure imbalance, severely impacting the efficiency and safety of the pyrolysis process.

[0004] Therefore, there is an urgent need for a pyrolysis furnace feeding device for medical waste treatment that can be seamlessly sealed and connected to a closed crushing device, withstand the high temperature radiation of the pyrolysis furnace, efficiently push materials to prevent blockage, and precisely control the pressure balance. This device can solve problems such as insufficient sealing, poor high temperature adaptability, interruption of conveying and pressure imbalance of existing devices, and ensure the continuous, stable and harmless operation of the medical waste pyrolysis process. Utility Model Content

[0005] In view of this, this utility model proposes a feeding device for a pyrolysis furnace for treating pyrolysis medical waste, which aims to solve the problems of insufficient device sealing, poor high-temperature adaptability, conveying interruption and pressure imbalance.

[0006] This utility model provides a feeding device for a pyrolysis furnace used in the treatment of pyrolysis medical waste, comprising: a closed feeding shell, a connecting assembly, a pushing module, a heat insulation module, and a negative pressure balancing assembly; The connecting component and the pushing module are sequentially arranged inside the closed feeding shell along the material conveying direction, and the connecting component, the pushing module, the heat insulation module, and the negative pressure balance component are connected based on a sealed channel; The connecting assembly includes a first docking flange and a pneumatic sealing gate valve. The first docking flange is fixedly connected to the input end of the closed feed housing and is used for sealing docking with the discharge assembly of the closed crushing device. The pneumatic sealing gate valve is disposed in the sealing channel between the first docking flange and the push module. The heat insulation module is located on the side of the closed feed shell near the pyrolysis furnace, and the negative pressure balance component is installed through the top surface of the closed feed shell. The pushing module includes a drive motor, a pushing screw, and a wear-resistant bushing. The drive motor is fixed to the outside of the closed feeding housing. The pushing screw passes through the side wall of the housing and is connected to the output end of the drive motor. The wear-resistant bushing is fitted to the inner wall of the closed feeding housing and wraps around the pushing screw.

[0007] Furthermore, the heat insulation module includes a heat insulation layer and a protective shell. The heat insulation layer is fitted onto the inner wall of the closed feed shell near the furnace body flange, and the protective shell is disposed on the outer side of the heat insulation layer and welded and fixed to the closed feed shell.

[0008] Furthermore, the negative pressure balancing assembly includes a vacuum pump, a negative pressure interface, and a pressure sensor. The vacuum pump is disposed on the outer side of the enclosed feed housing, and the negative pressure interface is connected to the vacuum pump via a pipe.

[0009] Furthermore, the pressure sensor is installed on the top surface inside the closed feed housing to monitor the pressure value inside the housing in real time.

[0010] Furthermore, the push screw includes a central shaft, a wear-resistant layer, and helical blades. The central shaft is connected to a drive motor via a coupling. The end of the central shaft away from the motor is disposed in a bearing seat on the inner wall of the closed feed housing. The bearing seat is fixedly welded to the closed feed housing, and a seal is provided at the connection between the bearing seat and the closed feed housing.

[0011] Furthermore, the helical blade is fixedly welded to the central shaft, and the wear-resistant layer is disposed on the outer surface of the helical blade.

[0012] Furthermore, the output end of the closed feed shell is provided with a furnace body docking flange, which is sealed to the feed port of the pyrolysis furnace, and a high-temperature sealing gasket is provided at the connection.

[0013] Furthermore, the connecting assembly also includes a filter grille, which is horizontally disposed between the first mating flange and the pneumatic sealing gate valve.

[0014] Furthermore, a cleaning port is provided at the bottom of the closed feed housing, the cleaning port is provided with a quick-opening sealing cover, and a sealing ring is provided at the contact part between the sealing cover and the closed feed housing.

[0015] Furthermore, an annular electric heating coil is provided inside the furnace body flange for preheating the material before it enters the pyrolysis furnace.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: Through seamless sealing and double-sealing design of the connecting components, leakage of pathogen-containing aerosols and debris can be effectively prevented, enhancing the system's sealing performance to meet the "harmlessness" requirement. The composite structure of the heat insulation module can withstand the high-temperature radiation of the pyrolysis furnace, and together with the high-temperature sealing gasket, it solves the sealing failure problem caused by high temperature in traditional devices, ensuring long-term stable operation. The screw with decreasing pitch, wear-resistant blade layer, and filter grid of the pushing module can prevent material agglomeration and blockage, achieving continuous and efficient conveying. The negative pressure balancing component, through the linkage of pressure sensor and vacuum pump, precisely controls the micro-negative pressure to balance the furnace pressure, eliminating the risk of backflow. The whole system achieves the synergy of "sealing-high temperature resistance-continuous conveying-pressure balance", perfectly adapting to the core requirements of medical waste pyrolysis process and effectively making up for the technical defects of existing devices. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this utility model; Figure 2 A schematic diagram of the main body provided for an embodiment of this utility model; Figure 3 A schematic diagram of the furnace body connecting flange structure provided in an embodiment of this utility model; The components are as follows: 100, enclosed feed housing; 200, cleaning port; 300, quick-opening sealing cover; 400, sealing ring; 500, furnace body connecting flange; 600, high-temperature sealing gasket; 700, annular electric heating ring; 110, connecting assembly; 120, first connecting flange; 130, pneumatic sealing gate valve; 140, filter grid; 210, pushing module; 220, drive motor; 230, pushing screw; 240, wear-resistant bushing; 250, central shaft; 260, wear-resistant layer; 270, spiral blade; 280, coupling; 290, bearing seat; 310, heat insulation module; 320, heat insulation layer; 330, protective shell; 410, negative pressure balance assembly; 420, vacuum pump; 430, negative pressure interface; 440, pressure sensor. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Please see Figure 1-3 It includes a closed feed housing 100, a connecting assembly 110, a pushing module 210, a heat insulation module 310, and a negative pressure balancing assembly 410; In this technical solution, such as Figure 2 As shown, the connecting component 110 and the pushing module 210 are sequentially arranged inside the closed feeding shell 100 along the material conveying direction, and the connecting component 110, the pushing module 210, the heat insulation module 310, and the negative pressure balance component 410 are connected based on a sealed channel. The connecting assembly 110 includes a first docking flange 120 and a pneumatic sealing gate valve 130. The first docking flange 120 is fixedly connected to the input end of the closed feed housing 100 and is used for sealing docking with the discharge assembly of the closed crushing device. The pneumatic sealing gate valve 130 is disposed in the sealing channel between the first docking flange 120 and the push module 210. The heat insulation module 310 is disposed on the side of the closed feed shell 100 near the pyrolysis furnace, and the negative pressure balance component 410 is disposed through the top surface of the closed feed shell 100. The pushing module 210 includes a drive motor 220, a pushing screw 230, and a wear-resistant bushing 240. The drive motor 220 is fixed to the outside of the closed feeding housing 100. The pushing screw 230 passes through the side wall of the housing and is connected to the output end of the drive motor 220. The wear-resistant bushing 240 is fitted to the inner wall of the closed feeding housing 100 and wraps around the pushing screw 230.

[0023] In a preferred embodiment, such as Figure 3 As shown, the heat insulation module 310 includes a heat insulation layer 320 and a protective shell 330. The heat insulation layer 320 is attached to the inner wall of the closed feed housing 100 near the furnace body docking flange 500. The protective shell 330 is disposed on the outside of the heat insulation layer 320 and is welded and fixed to the closed feed housing 100.

[0024] Understandably, the insulation layer 320 is made of high-density aluminum silicate fiber felt with a thickness of 50-60mm. An aluminum foil reflective layer is attached to the inner side to enhance the insulation effect. It is attached and fixed to the inner wall of the closed feed shell 100 near the furnace body flange 500 by a high-temperature resistant adhesive. The joints are filled with ceramic fiber rope for sealing. The protective shell 330 is made of 310S high-temperature resistant stainless steel and has an arc-shaped structure covering the outside of the insulation layer 320. The edges are fixed to the closed feed shell 100 by continuous welding to form double protection. The aluminum silicate fiber layer can effectively block the high-temperature radiation above 800℃ of the pyrolysis furnace, control the temperature of the outer shell to below 60℃, and prevent the seals from aging due to high temperature. The stainless steel protective shell 330 can not only protect the heat insulation layer 320 from material impact and wear, and prevent fiber shedding and contamination of materials, but also enhance the structural rigidity through welding and fixation, adapting to the vibration environment during material pushing. At the same time, it works in conjunction with the high-temperature sealing gasket 600 of the furnace body flange 500 to further enhance the sealing performance of the high-temperature area, significantly extend the service life of the equipment, and ensure the long-term stable operation of the feeding device in a high-temperature environment.

[0025] In a preferred embodiment, such as Figure 2 As shown, the negative pressure balancing assembly 410 includes a vacuum pump 420, a negative pressure interface 430, and a pressure sensor 440. The vacuum pump 420 is disposed on the outer side of the enclosed feed housing 100, and the negative pressure interface 430 is connected to the vacuum pump 420 via a pipe.

[0026] In a preferred embodiment, such as Figure 2 As shown, the pressure sensor 440 is installed on the top surface inside the closed feed housing 100 to monitor the pressure value inside the housing in real time.

[0027] Understandably, the vacuum pump 420 is a small vortex vacuum pump 420, which is fixed on the shock-absorbing bracket on the outer side of the closed feed housing 100; the negative pressure interface 430 is made of 304 stainless steel, passes through the top of the housing through a flange with sealing threads, and is equipped with a fluororubber sealing ring 400 at the interface, and is then connected to the vacuum pump 420 through a Φ16mm stainless steel bellows, with a manual regulating valve connected in series in the middle section of the pipeline; the pressure sensor 440 is a high-precision diffused silicon type, whose sensing end is embedded in the inner top surface of the closed feed housing 100, and the main body is fixed by a sealing flange, and is electrically connected to the external control system to realize real-time data transmission. The pressure sensor 440 installed on the inner top surface can accurately capture pressure fluctuations of ±0.1 kPa inside the housing. Together with the vacuum pump 420 and the regulating valve, it forms a closed-loop control to quickly stabilize the pressure at -5~-10 kPa, keeping it consistent with the pulverizing system. The bellows connection buffers vibration and prevents leakage. High-precision monitoring and linkage control effectively prevent backflow of flue gas from the pyrolysis furnace or the leakage of pathogen-containing aerosols. This ensures the system's airtightness and maintains stable feed pressure, significantly improving operational safety and feed continuity.

[0028] In a preferred embodiment, such as Figure 2 As shown, the push screw 230 includes a central shaft 250, a wear-resistant layer 260, and a spiral blade 270. The central shaft 250 is connected to the drive motor 220 based on a coupling 280. The end of the central shaft 250 away from the motor is disposed in a bearing seat 290 in the inner wall of the closed feed housing 100. The bearing seat 290 is fixedly welded to the closed feed housing 100, and a seal is provided at the connection between the bearing seat 290 and the closed feed housing 100.

[0029] In a preferred embodiment, such as Figure 2 As shown, the spiral blade 270 is fixedly welded to the central shaft 250, and the wear-resistant layer 260 is disposed on the outer side of the spiral blade 270.

[0030] Understandably, the central shaft 250 is connected to the output end of the drive motor 220 via a flexible coupling 280. The coupling 280 is made of 45# steel and has undergone heat treatment to buffer radial vibration during the pushing process and prevent motor overload damage. The end of the central shaft 250 away from the motor is nested in a deep groove ball bearing housing 290. The bearing housing 290 is made of Q235 steel and welded to the inner wall of the enclosed feed housing 100. A fluororubber sealing ring 400 is embedded at the weld seam between the bearing housing and the housing to prevent material debris from seeping into the bearing clearance. The spiral blade 270 is made of 16Mn steel and integrally welded to the central shaft 250. The blade edges are rounded by 5mm, and the outer surface is coated with a 0.2-0.3mm thick zirconia ceramic wear-resistant layer 260. The flexible coupling 280 and the bearing housing 290 work together in a sealing structure to ensure the stability of screw rotation and prevent leakage in the sealing channel. The ceramic wear-resistant layer 260 can withstand long-term friction from hard particles in medical waste, and together with the rounded blades, it reduces material jamming and significantly extends the service life of the push module 210. At the same time, it ensures the precise clearance between the screw and the wear-resistant bushing 240, maintains a micro-negative pressure environment in the system, and improves the continuity and safety of material conveying.

[0031] In a preferred embodiment, such as Figure 3 As shown, the output end of the closed feed housing 100 is provided with a furnace body docking flange 500, which is sealed to the feed port of the pyrolysis furnace, and a high-temperature sealing gasket 600 is provided at the connection.

[0032] It is understood that the furnace body docking flange 500 at the output end of the enclosed feed housing 100 is made of 310S high-temperature resistant stainless steel. The flange end face is machined with an annular sealing groove 10mm wide and 3mm deep, and a high-temperature sealing gasket 600 is embedded in the groove. Twelve M16 bolt holes are evenly distributed around the flange circumference. High-strength, high-temperature resistant bolts are used to securely connect the flange to the pyrolysis furnace feed port flange, and anti-loosening nuts are installed on the bolt heads. The 310S stainless steel flange can withstand the high-temperature radiation of the pyrolysis furnace above 800℃ without deformation. The combination of the annular sealing groove and the graphite composite gasket can achieve a metal-non-metal double seal through bolt pre-tightening force, effectively preventing high-temperature flue gas from leaking from the connection. The anti-loosening nuts prevent bolt loosening caused by vibration, ensuring the sealing reliability during long-term operation. This not only ensures the seamless connection between the feed device and the pyrolysis furnace, but also prevents the flow of high-temperature pollutants, providing key guarantees for the continuous stability and operational safety of the pyrolysis process.

[0033] In a preferred embodiment, such as Figure 2 As shown, the connecting assembly 110 also includes a filter grid 140, which is horizontally disposed between the first docking flange 120 and the pneumatic sealing gate valve 130.

[0034] It is understood that the filter grid 140 of the connecting component 110 is made of 304 stainless steel. The grid plate has 5-8mm square mesh holes evenly distributed, and the edges are welded with 20mm high retaining edges to prevent material leakage. Two 10mm wide reinforcing ribs are set along the diagonal below the grid to enhance the structural rigidity to withstand material impact. The grid is horizontally embedded in the inner wall of the housing between the first docking flange 120 and the pneumatic sealing gate valve 130 through a slotted structure, and the four corners are fixed with hexagonal bolts for easy disassembly and cleaning. The beneficial effects of this design are as follows: the 5-8mm mesh can accurately intercept excessive hard particles remaining after pretreatment, preventing them from entering the push module 210 and causing screw jamming or excessive wear of the wear-resistant bushing 240; the combination of the side guards and reinforcing ribs ensures that the grid does not deform under material impact, maintaining a stable interception effect; the detachable structure allows for periodic and rapid cleaning of impurities trapped by the grid without stopping the entire device, ensuring the smooth flow of the feed channel and reducing maintenance time. In conjunction with the pneumatic sealing gate valve 130, it enhances the system's sealing performance, providing a pre-guarantee for the continuous and stable operation of the subsequent push process.

[0035] In a preferred embodiment, such as Figure 2 As shown, the bottom of the closed feed housing 100 is provided with a cleaning port 200, the cleaning port 200 is provided with a quick-opening sealing cover 300, and a sealing ring 400 is provided at the contact part between the sealing cover and the closed feed housing 100.

[0036] It is understood that the cleaning port 200 at the bottom of the closed feeding housing 100 is located below the end of the corresponding pushing module 210, with a diameter of 200-250mm and a 304 stainless steel flange welded to the edge. The quick-opening sealing cover 300 is made of the same steel plate and is connected to the housing flange through three sets of hinges. The cover has four butterfly buckles around its circumference, which, together with the rotating handle, can be quickly opened and closed within 10 seconds. The inner side of the cover has an annular groove and an 8mm diameter fluororubber sealing ring 400, which fits tightly against the end face of the housing flange. The targeted cleaning port 200 can directly remove residual material debris or clumps during the pushing process, avoiding long-term accumulation that could cause channel blockage. The quick-opening structure and butterfly buckles significantly shorten the cleaning operation time, allowing cleaning to be completed without disassembling the device. The fluororubber sealing ring 400 forms a reliable seal under the pre-tightening force of the buckles, preventing aerosol leakage under negative pressure, ensuring system sealing, reducing maintenance intensity, and ensuring long-term stable operation of the feeding device.

[0037] In a preferred embodiment, such as Figure 3 As shown, an annular electric heating coil 700 is provided inside the furnace body connecting flange 500 for preheating the material before it enters the pyrolysis furnace.

[0038] It is understood that the annular electric heating coil 700 inside the furnace body connecting flange 500 uses a nickel-chromium alloy heating wire, with a 310S stainless steel protective tube, evenly distributed along the inner circumference of the flange, and embedded in the pre-made annular groove of the flange. A 0.5mm thick mica sheet is laid at the bottom as an insulation layer. The heating coil is connected to an external temperature controller through a high-temperature resistant cable, and equipped with a K-type thermocouple to monitor the temperature of the heating area in real time, achieving constant temperature control of 200-300℃. When the material is conveyed to the flange by the push screw 230, it can be preheated to 150-250℃, which can evaporate residual moisture, avoid low-temperature water vapor entering the pyrolysis furnace and causing a sudden drop in furnace temperature, and reduce the temperature difference impact between the material and the high-temperature furnace body, thus reducing the heat load of the pyrolysis furnace. The stainless steel protective tube and mica insulation layer ensure the insulation safety of the heating coil in a high-temperature environment. The temperature control system accurately maintains the preheating temperature, and the heat insulation module 310 reduces the heat conduction to the shell, which not only improves the thermal pyrolysis efficiency, but also avoids damage to the flange seals due to local overheating, ensuring the coordinated stability of the feeding process and the pyrolysis process.

[0039] The working principle of each of the above embodiments is as follows: After being sealed and pulverized, the medical waste enters the device through the first docking flange 120. After being filtered by the filter grid 140 to intercept excessive hard particles, the pneumatic sealing gate valve 130 opens and closes according to the feeding rhythm, ensuring both material entry and maintaining the channel's seal. The drive motor 220 drives the push screw 230 to rotate, and the spiral blades 270 with decreasing pitch continuously compress and push the material. The wear-resistant layer 260 of the blades cooperates with the wear-resistant bushing 240 to reduce wear and prevent jamming. In the negative pressure balance component 410, the pressure sensor 440 monitors the pressure inside the housing in real time, and the linked vacuum pump 420 is adjusted through the negative pressure interface 430 to increase the pressure. The pressure is kept stable in the range of -5 to -10 kPa to prevent leakage of pathogen-containing aerosols and backflow of flue gas from the pyrolysis furnace. The insulation layer 320 and the protective shell 330 of the insulation module 310 block the high-temperature radiation of the pyrolysis furnace and protect the shell and seals. The annular electric heating ring 700 inside the furnace body connecting flange 500 preheats the material to 150-250°C, removes residual moisture and reduces the heat load of the pyrolysis furnace. Finally, the material enters the pyrolysis furnace through the high-temperature sealed furnace body connecting flange 500. The bottom cleaning port 200 can periodically and quickly remove residual materials to ensure long-term stable operation. The whole process realizes the sealed, continuous and safe feeding of medical waste from pretreatment to pyrolysis.

[0040] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A pyrolysis medical waste treatment pyrolysis furnace feed device, characterized by, It includes: a closed feeding shell, a connecting component, a pushing module, a heat insulation module, and a negative pressure balancing component; the connecting component and the pushing module are sequentially arranged inside the closed feeding shell along the material conveying direction, and the connecting component, the pushing module, the heat insulation module, and the negative pressure balancing component are connected based on a sealed channel; The connecting assembly includes a first docking flange and a pneumatic sealing gate valve. The first docking flange is fixedly connected to the input end of the closed feed housing and is used for sealing docking with the discharge assembly of the closed crushing device. The pneumatic sealing gate valve is disposed in the sealing channel between the first docking flange and the push module. The heat insulation module is located on the side of the closed feed shell near the pyrolysis furnace, and the negative pressure balance component is installed through the top surface of the closed feed shell. The pushing module includes a drive motor, a pushing screw, and a wear-resistant bushing. The drive motor is fixed to the outside of the closed feeding housing. The pushing screw passes through the side wall of the housing and is connected to the output end of the drive motor. The wear-resistant bushing is fitted to the inner wall of the closed feeding housing and wraps around the pushing screw.

2. A pyrolytic medical waste treatment pyrolysis furnace feed device according to claim 1, characterized in that, The heat insulation module includes a heat insulation layer and a protective shell. The heat insulation layer is fitted onto the inner wall of the closed feed shell near the furnace body flange, and the protective shell is located on the outside of the heat insulation layer and is welded and fixed to the closed feed shell.

3. The pyrolytic medical waste treatment pyrolysis furnace feed device according to claim 1, characterized in that, The negative pressure balancing assembly includes a vacuum pump, a negative pressure interface, and a pressure sensor. The vacuum pump is located on the outer side of the enclosed feed housing, and the negative pressure interface is connected to the vacuum pump via a pipe.

4. The pyrolytic medical waste treatment pyrolysis furnace feed device according to claim 3, characterized in that, The pressure sensor is installed on the top surface inside the closed feed housing to monitor the pressure value inside the housing in real time.

5. The pyrolytic medical waste treatment pyrolysis furnace feed device according to claim 1, characterized in that, The pusher screw includes a central shaft, a wear-resistant layer, and helical blades. The central shaft is connected to a drive motor via a coupling. The end of the central shaft away from the motor is located in a bearing seat on the inner wall of the closed feed housing. The bearing seat is fixedly welded to the closed feed housing, and a seal is provided at the connection between the bearing seat and the closed feed housing.

6. A pyrolytic medical waste treatment pyrolysis furnace feed device according to claim 5, characterized in that, The spiral blade is fixedly welded to the central shaft, and the wear-resistant layer is disposed on the outer surface of the spiral blade.

7. The pyrolytic medical waste treatment pyrolysis furnace feed device according to claim 1, characterized in that, The output end of the closed feed shell is provided with a furnace body connecting flange, which is sealed to the feed port of the pyrolysis furnace, and a high-temperature sealing gasket is provided at the connection.

8. The feeding device for a pyrolysis furnace for treating pyrolysis medical waste according to claim 1, characterized in that, The connecting assembly also includes a filter grille, which is horizontally positioned between the first mating flange and the pneumatic sealing gate valve.

9. The feeding device for a pyrolysis furnace for treating pyrolysis medical waste according to claim 1, characterized in that, The bottom of the enclosed feed housing is provided with a cleaning port, the cleaning port is provided with a quick-opening sealing cover, and a sealing ring is provided at the contact part between the sealing cover and the enclosed feed housing.

10. A feeding device for a pyrolysis furnace for treating pyrolysis medical waste according to claim 7, characterized in that, An annular electric heating ring is provided inside the furnace body flange for preheating the material before it enters the pyrolysis furnace.

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