Closed pulverizing device for medical waste pyrolysis

Abstract

The utility model relates to medical waste treatment equipment technical field, concretely relates to a kind of closed crushing device of medical waste pyrolysis, comprising: closed shell, feed assembly, crushing module, dehydration module, ultraviolet sterilization module and discharge assembly;Feed assembly, ultraviolet sterilization module, crushing module, dehydration module, discharge assembly are sequentially arranged in closed shell inside along material direction;The first drive motor of crushing module is fixed to the outer top surface of closed shell, rotating shaft penetrates shell top wall and connects its output end, and broken blade is evenly distributed on the outside of rotating shaft;Dehydration module is provided with heating plate symmetrical to the inner wall of closed shell and is connected with the output end of second drive motor by being built-in in heating plate and spiral conveyor;Shell is also provided with liquid-collecting tank, heat preservation layer and top negative pressure interface.Integrated closed pretreatment is realized, pathogen aerosol leakage is prevented, processing efficiency is improved, and operation and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of medical waste treatment equipment, and more specifically, to a closed pulverizing device for the pyrolysis of medical waste. Background Technology

[0002] With the development of the medical industry, the amount of medical waste generated is increasing. Improper handling of this waste can easily lead to secondary pollution and public health risks. Thermolysis technology has become the mainstream treatment method because it can reduce, render harmless, and recycle medical waste. However, this technology has stringent requirements for feed pretreatment—the waste needs to be crushed into uniform particles of 5-10 mm and 30%-50% of the moisture needs to be removed. Therefore, "integrated crushing-dehydration pretreatment" is a key prerequisite for the efficient application of thermolysis.

[0003] Existing medical waste pretreatment devices suffer from multiple defects: First, insufficient sealing, with most being semi-enclosed structures or lacking sealing measures at module connections, easily leading to leakage of pathogen-containing aerosols and debris, causing occupational exposure and odor pollution; second, disconnect between pulverization and dehydration, requiring manual or conveyor belt transfer of materials, reducing efficiency and easily causing secondary water absorption and contamination; third, poor dehydration effect, lack of simultaneous sterilization, and fixed-pitch screw conveyors prone to blockage due to material agglomeration, increasing maintenance costs by more than 30%, making them unsuitable for the requirements of pyrolysis technology. Existing devices cannot simultaneously meet the core requirements of "sealed leak prevention, synergistic pulverization-dehydration-sterilization, and efficient adaptation to pyrolysis," thus limiting the stable application of pyrolysis technology.

[0004] Therefore, there is an urgent need for an integrated, highly enclosed, and highly adaptable closed pyrolysis pulverizing device to solve the problems of insufficient enclosure, low efficiency, high cost, and easy contamination in the existing technologies. Utility Model Content

[0005] In view of this, this utility model proposes a closed pulverizing device for the pyrolysis of medical waste to address the shortcomings of existing medical waste treatment devices, which aims to solve the problems of insufficient sealing, low efficiency, poor dehydration effect, easy pollution and high cost.

[0006] This utility model provides a closed pulverizing device for pyrolysis of medical waste, including: a closed shell, a feeding assembly, a pulverizing module, a dehydration module, an ultraviolet sterilization module, and a discharging assembly; The feeding assembly, crushing module, dewatering module, and discharging assembly are sequentially arranged inside the closed housing along the material conveying direction, and the crushing module, dewatering module, feeding assembly, and discharging assembly are connected by a sealed channel; the ultraviolet sterilization module is arranged on the inner wall of the closed housing, and the ultraviolet sterilization module is arranged between the feeding assembly and the crushing module. The crushing module includes a first drive motor, a rotating shaft, and crushing blades. The first drive motor is fixedly mounted on the top surface of the closed housing. The rotating shaft passes through the top wall of the closed housing and is connected to the output end of the drive motor. The crushing blades are evenly distributed on the outer side of the rotating shaft. The dehydration module includes heating plates and a screw conveyor. The heating plates are symmetrically arranged on the inner wall of the closed housing, and the screw conveyor is arranged between the heating plates. Its output end is connected to the discharge assembly.

[0007] Furthermore, the crushing module is also provided with an inclined bottom plate, which is located at the bottom of the crushing module and welded to the inner wall of the crushing module, with an inclination angle of 5º-10º.

[0008] Furthermore, the enclosed shell is also provided with a liquid collection tank, a heat insulation layer and a negative pressure interface. The liquid collection tank is located at the bottom of the dehydration module and is connected to an external wastewater treatment device via a drain pipe. The heat insulation layer is located on the inner wall of the enclosed shell.

[0009] Furthermore, the negative pressure interface is located at the top of the enclosed housing, and the negative pressure interface is connected to an external vacuum pump via a pipe to maintain a micro-negative pressure environment inside the housing.

[0010] Furthermore, the heating plate is provided with a water receiving plate, a textured surface, and an anti-stick coating, and a heat insulation pad is provided at the connection between the heating plate and the enclosed shell.

[0011] Furthermore, a drain hole is provided at the lowest end of the water receiving plate, and the drain hole is connected to the liquid collection tank via a short pipe.

[0012] Furthermore, the spiral conveyor includes a central shaft, a second drive motor, and spiral blades. The second drive motor is disposed on the outer side of the enclosed housing and is bolted to the outer side of the enclosed housing based on a bracket. The output end of the second drive motor is fixedly connected to the central shaft based on a coupling. The end of the central shaft away from the motor passes through a bearing seat in the inner wall of the enclosed housing. The bearing seat is fixedly welded to the enclosed housing. The spiral blades are welded and fixed to the central shaft, and the width of the spiral blades extends radially along the central shaft.

[0013] Furthermore, the feeding assembly includes a feeding hopper and a sealing gate. The feeding hopper extends through the top of the enclosed housing, and the sealing gate is located at the outlet of the feeding hopper to control the flow rate of material entering the enclosed housing and maintain a closed state.

[0014] Furthermore, the discharge assembly includes a discharge pipe and a sealing valve. One end of the discharge pipe is connected to the screw conveyor, and the other end passes through the enclosed housing and extends to the outside. The sealing valve is installed on the discharge pipe for sealing connection with the feed port of the pyrolysis furnace.

[0015] Furthermore, the ultraviolet sterilization module includes ultraviolet lamps, which are evenly distributed circumferentially along the inner wall of the enclosed housing. The ultraviolet lamps are bolted to the inner wall of the enclosed housing based on strip-shaped fixing seats, which are located directly below the outlet of the feeding component.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: Based on the overall design of "enclosed shell + sealed channel connection between modules", the problem of insufficient sealing of existing devices is completely solved, effectively avoiding the leakage of aerosols and debris containing pathogens, and eliminating occupational exposure and odor pollution for operators. At the same time, the feeding, ultraviolet sterilization, crushing, dehydration and discharge functions are integrated into one unit, eliminating the need for manual or conveyor belt material transfer, significantly shortening the processing time per batch, and avoiding secondary water absorption by materials. With the concave and convex texture of the heating plate and the decreasing pitch design of the screw conveyor, the contact area between the material and the heating plate is increased, resulting in a significant increase in the dehydration rate, which fully meets the moisture requirements of pyrolysis feed. In addition, the ultraviolet sterilization module between the feeding component and the crushing module can inactivate pathogens in the pretreatment stage, eliminating the risk of cross-contamination. The adaptive structure and anti-stick coating design of the screw conveyor reduce material agglomeration and jamming, reducing operation and maintenance costs by more than 30%. At the same time, solid-liquid separation is achieved based on the water receiving plate and liquid collection tank, simplifying the subsequent wastewater treatment process. The overall design takes into account the closed safety, collaborative processing efficiency and pyrolysis adaptability, significantly improving the economy and reliability of medical waste pretreatment. 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 structure provided for an embodiment of this utility model; Figure 3 A schematic diagram of the heating plate structure provided in an embodiment of this utility model; The components are as follows: 100, enclosed shell; 200, liquid collection tank; 300, insulation layer; 400, negative pressure interface; 110, crushing module; 120, first drive motor; 130, rotating shaft; 140, crushing blade; 150, inclined bottom plate; 210, dewatering module; 220, heating plate; 230, water receiving plate; 240, textured surface; 250, anti-stick coating; 260, heat insulation pad; 270, drain hole; 310, screw conveyor; 320, central shaft; 330, second drive motor; 340, screw blade; 350, coupling; 360, bearing seat; 410, feeding assembly; 420, feeding hopper; 430, sealing gate; 510, discharging assembly; 520, discharging pipe; 530, sealing valve; 610, ultraviolet sterilization module; 620, ultraviolet lamp. 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 shell, a feeding assembly, a crushing module, a dewatering module, an ultraviolet sterilization module 610, and a discharge assembly; In this technical solution, such as Figure 2 As shown, the feeding assembly 410, the crushing module 110, the dewatering module 210, and the discharging assembly 510 are sequentially arranged inside the closed housing 100 along the material conveying direction, and the crushing module 110, the dewatering module 210, the feeding assembly 410, and the discharging assembly 510 are connected by a sealed channel; the ultraviolet sterilization module 610 is arranged on the inner wall of the closed housing 100, and the ultraviolet sterilization module 610 is arranged between the feeding assembly 410 and the crushing module 110; The crushing module 110 includes a first drive motor 120, a rotating shaft 130, and crushing blades 140. The drive motor is fixedly mounted on the top surface of the closed housing 100. The rotating shaft 130 passes through the top wall of the closed housing 100 and is connected to the output end of the drive motor. The crushing blades 140 are evenly distributed on the outer side of the rotating shaft 130. The dehydration module 210 includes a heating plate 220 and a spiral conveyor 310. The heating plates 220 are symmetrically arranged on the inner wall of the closed housing 100, and the spiral conveyor 310 is arranged between the heating plates 220, with its output end connected to the discharge assembly 510.

[0023] In a preferred embodiment, such as Figure 2 As shown, the crushing module 110 is also provided with an inclined bottom plate 150, which is located at the bottom of the crushing module 110 and is welded to the inner wall of the crushing module 110. The inclined bottom plate 150 has an inclination angle of 5º-10º.

[0024] Understandably, the inclined base plate 150 at the bottom of the crushing module 110 is made of 304 stainless steel. Its edges are fully welded to the inner wall of the crushing module 110, and the weld is polished to form a smooth transition surface. The surface is sprayed with a 0.1-0.3mm thick polytetrafluoroethylene anti-stick coating 250. The inclination angle is precisely set at 5º-10º. The lowest end of the base plate is precisely aligned with the entrance of the sealed channel, with a 5mm wide arc transition edge reserved at the joint. In this design, the combination of stainless steel and anti-stick coating 250 can prevent medical waste such as dressings containing sticky drugs from adhering to the base plate, reducing the risk of material residue and bacterial growth. The full welding and smooth weld can withstand the vibration generated by the high-speed rotation of the crushing blade 140, preventing the base plate from loosening and causing material jamming. The reasonable inclination angle and precise alignment structure can guide the crushed material to quickly enter the next stage, improving the conveying efficiency by more than 15%, while avoiding the accumulation of debris at the joint, reducing the cleaning frequency, and fully meeting the hygiene standards and continuous operation requirements of medical waste treatment.

[0025] In a preferred embodiment, such as Figure 2 As shown, the enclosed housing 100 is also provided with a liquid collection tank 200, a heat insulation layer 300 and a negative pressure interface 400. The liquid collection tank 200 is located at the bottom of the dehydration module 210 and is connected to an external wastewater treatment device via a drain pipe. The heat insulation layer 300 is located on the inner side wall of the enclosed housing 100.

[0026] Understandably, the liquid collection tank 200 of the closed housing 100 is made of 304 stainless steel, with an arc-shaped bottom design. The inner wall is mirror-polished to reduce waste liquid residue. Its top is sealed and welded to the short pipe of the water receiving plate 230 of the dehydration module 210. The bottom is connected to the external wastewater treatment device through a drain pipe with a one-way valve. A fluororubber sealing gasket is clamped at the interface between the drain pipe and the liquid collection tank 200. The insulation layer 300 is made of aluminum silicate fiber with a thickness of 50-80mm. An aluminum foil reflective layer is attached to the inside, completely covering the inner wall of the closed housing 100 (except for the installation area of ​​the heating plate 220). The edges of the insulation layer 300 and the module interface are sealed with high-temperature resistant sealant. The negative pressure interface 400 is preset at the top of the closed housing 100 near the dehydration module 210. The interface diameter is 50mm, with a built-in fluororubber sealing ring, and is sealed to the external vacuum pump through a threaded pipe. In this design, the arc-shaped structure of the collection tank 200 and the one-way valve can prevent wastewater from stagnating or flowing back, thus eliminating secondary pollution; the insulation layer 300 reduces heat loss from the heating plate 220 through low thermal conductivity materials and a reflective layer, reducing energy consumption by more than 20%, while maintaining a stable dehydration temperature inside the shell; the negative pressure interface 400, in conjunction with a vacuum pump, can continuously maintain a slightly negative pressure environment inside the shell, preventing the leakage of aerosols containing pathogens, further enhancing the sealing of the device, ensuring the safety of operators, and meeting the hygiene and safety requirements for medical waste treatment.

[0027] In a preferred embodiment, such as Figure 2 As shown, the negative pressure interface 400 is located on the top of the enclosed housing 100. The negative pressure interface 400 is connected to an external vacuum pump via a pipe to maintain a micro-negative pressure environment inside the housing.

[0028] Understandably, the negative pressure interface 400 is made of 304 stainless steel and has a diameter of 50-80mm. It is fixed to the top of the enclosed housing 100 near the dehydration module 210 by full welding. The interface has a stepped sealing groove on the inside, in which a fluororubber sealing ring with an O-shaped cross section is embedded. The outside is machined with external threads. The connecting pipe is made of the same stainless steel. One end is screwed into the negative pressure interface 400 through internal threads. The threaded joint is wrapped with PTFE tape to strengthen the seal. The other end is connected to the air inlet flange of the external vacuum pump. A pressure sensor and an electromagnetic regulating valve are connected in series on the pipe, which can stably control the negative pressure in the housing within the range of -5kPa to -10kPa. In this design, the stainless steel material and multiple sealing structures prevent leakage at the negative pressure interface 400, ensuring a stable micro-negative pressure environment. The precise installation position does not affect material feeding and can efficiently discharge water vapor generated by the dehydration module 210, helping to improve dehydration efficiency by 5%-8%. The stable micro-negative pressure can prevent aerosols containing pathogens from overflowing from the module connection gaps, eliminating the risk of occupational exposure for operators, while suppressing the spread of odors, improving the workshop working environment, and fully meeting the safety and hygiene requirements for medical waste treatment.

[0029] In a preferred embodiment, such as Figure 3 As shown, the heating plate 220 is provided with a water receiving plate 230, a textured surface 240 and an anti-stick coating 250, and a heat insulation pad 260 is provided at the connection between the heating plate 220 and the enclosed housing 100.

[0030] Understandably, the heating plate 220 body is made of 304 stainless steel plate with a thickness of 3-5mm. The side facing the spiral conveyor 310 is pressed with strip-shaped embossed texture 240, and the surface is sprayed with a 0.1-0.3mm thick polytetrafluoroethylene anti-stick coating 250. The water receiving plate 230 is an arc-shaped stainless steel structure, welded to the bottom edge of the heating plate 220, with a φ15-20mm drain hole 270 at the lowest end, which is sealed and connected to the liquid collection tank 200 through a short pipe. At the connection between the heating plate 220 and the inner wall of the closed shell 100, a 10-15mm thick mica heat insulation pad 260 is provided. The pad is fixed by bolts, and a heat insulation sleeve is fitted at the contact point between the bolts and the heating plate 220. In this design, the textured surface 240 increases the contact area between the material and the heating plate 220 by 15%-20%, while stirring the material to prevent local overheating and carbonization; the anti-stick coating 250 reduces material residue and lowers the frequency of cleaning; the heat insulation pad 260 blocks the heat from the heating plate 220 to the shell, reducing energy loss by 10%-15%; and the water collection plate 230 accurately collects condensate, achieving solid-liquid separation and preventing wastewater from contaminating solid materials, thus meeting the requirements for "harmless pretreatment" of medical waste.

[0031] In a preferred embodiment, such as Figure 3 As shown, the lowest end of the water receiving plate 230 is provided with a drain hole 270, which is connected to the liquid collection tank 200 based on a short pipe.

[0032] Understandably, the water receiving plate 230 is made of 304 stainless steel and has an overall arc-shaped structure (arc R50-R80mm) that matches the bottom curvature of the heating plate 220. A drain hole 270 with a diameter of 15-20mm is opened in the center of the lowest end, and the edge of the hole is rounded with a 3mm rounded corner (to avoid sharp edges scratching materials or leaving debris). The short pipe used for connection is a stainless steel pipe of the same material, with a length of 80-100mm. One end is fully welded to the drain hole 270, and the other end is connected to the top interface of the liquid collection tank 200 based on a flange with bolts. Fluororubber sealing gaskets are sandwiched between the flanges, and a 100-mesh stainless steel filter screen is embedded in the inner wall of the short pipe near the drain hole 270 to intercept crushed material debris and prevent pipe blockage. In this design, the arc-shaped structure and rounded drainage holes 270 can guide condensate to quickly collect and drain, avoiding water accumulation and bacterial growth; the full welded seal and fluororubber gaskets prevent wastewater leakage and contamination of solid materials; the filter screen reduces the risk of pipe blockage and the frequency of downtime cleaning; and the flange connection facilitates later maintenance and disassembly. The whole design achieves efficient and leak-free wastewater collection, ensures solid-liquid separation, and provides convenience for subsequent centralized wastewater treatment, meeting the hygiene and continuous operation requirements of medical waste pretreatment.

[0033] In a preferred embodiment, such as Figure 2 As shown, the spiral conveyor 310 includes a central shaft 320, a second drive motor 330, and spiral blades 340. The second drive motor 330 is disposed on the outer side of the enclosed housing 100 and is bolted to the outer side of the enclosed housing 100 based on a bracket. The output end of the second drive motor 330 is fixedly connected to the central shaft 320 based on a coupling 350. The end of the central shaft 320 away from the motor passes through a bearing seat 360 in the inner wall of the enclosed housing 100. The bearing seat 360 is fixedly welded to the enclosed housing 100. The spiral blades 340 are welded and fixed to the central shaft 320, and the width of the spiral blades 340 extends radially along the central shaft 320.

[0034] Understandably, the central shaft 320 of the screw conveyor 310 is made of 304 stainless steel with a diameter of 50-80mm, and its surface is heat-treated to improve its bending strength. The second drive motor 330 is a 0.75-1.5kW variable frequency motor, and the matching bracket is made of 50×50mm stainless steel angle steel welded together and fixed to the outer side of the enclosed housing 100 by 4 sets of M12 stainless steel anti-loosening bolts. The motor output end and the central shaft 320 are connected by a flexible coupling 350, and the coupling 350 is equipped with a dust cover on the outside. The end of the central shaft 320 away from the motor is inserted into a deep groove ball bearing seat 360, and the bearing seat 360 has a built-in double-sided sealing cover. The seat body is fully welded to the inner wall of the enclosed housing 100. The screw blades 340 are made of the same material as the central shaft 320, with a blade thickness of 8-12mm. The pitch gradually changes from 200-300mm at the input end to 100-150mm at the output end, and the outer edge of the blades maintains a gap of 5-10mm with the heating plate 220. In this design, the variable frequency motor and flexible coupling 350 are matched to precisely control the conveying speed. The decreasing pitch enables gradual compression during material conveying, improving the dehydration rate by 10%-15%. The sealed bearing housing 360 and dust cover prevent medical waste debris from contaminating the bearings and extend their service life. The anti-loosening bolts and fully welded structure ensure stable overall operation without vibration or displacement. The reasonable gap between the blades and the heating plate 220 prevents jamming and ensures continuous conveying, meeting the high-efficiency and low-maintenance requirements of medical waste pretreatment.

[0035] In a preferred embodiment, such as Figure 2 As shown, the feeding assembly 410 includes a feeding hopper 420 and a sealing gate 430. The feeding hopper 420 penetrates the top of the enclosed housing 100, and the sealing gate 430 is located at the outlet of the feeding hopper 420 to control the flow rate of material entering the enclosed housing 100 and maintain a closed state.

[0036] Understandably, the feed hopper 420 of the feeding assembly 410 is made of 304 stainless steel and has an inverted conical structure. The inner wall is mirror polished (Ra≤0.8μm) and sprayed with a 0.1mm thick polytetrafluoroethylene anti-stick coating 250. The connection between the hopper body and the top of the closed shell 100 is fully welded and sealed. The top is equipped with an openable dust cover. The sealing gate 430 is a double gate pneumatic valve. The valve body is connected to the outlet flange of the feed hopper 420. The edge of the gate is embedded with a U-shaped silicone sealing ring. The matching cylinder is linked to the PLC control system through the solenoid valve and can automatically adjust the opening degree according to the load of the subsequent modules. In this design, the inverted cone-shaped hopper and the anti-stick coating 250 prevent medical waste from adhering and clogging. The double gate structure enables rapid switching between "feeding and sealing," and the negative pressure environment of the shell forms a double seal to prevent the leakage of pathogen aerosols. PLC linkage control matches the feed rate with the load of the crushing and dewatering module 210 to prevent material accumulation. The dust cover prevents external pollutants from entering, thus improving the safety, controllability, and hygiene level of the feeding process and meeting the sealing requirements of medical waste treatment.

[0037] In a preferred embodiment, such as Figure 2 As shown, the discharge assembly 510 includes a discharge pipe 520 and a sealing valve 530. One end of the discharge pipe 520 is connected to the screw conveyor 310, and the other end passes through the enclosed housing 100 and extends to the outside. The sealing valve 530 is installed on the discharge pipe 520 and is used to seal the connection with the feed port of the pyrolysis furnace.

[0038] Understandably, the discharge pipe 520 of the discharge assembly 510 is made of 304 stainless steel, with a pipe diameter of 80-120mm and a wall thickness of 3-5mm. One end is fully welded to the outlet of the screw conveyor 310, and the weld is tested for penetration to ensure a seal. The other end is equipped with an annular reinforcing rib at the point where it passes through the closed shell 100 and is welded to the shell to prevent vibration and loosening. The pipe is wrapped with a 30-50mm thick aluminum silicate insulation layer 300 to reduce material cooling and clumping. The sealing valve 530 is a flange-type electric ball valve. The valve body is connected to the flange of the discharge pipe 520. The valve core surface is coated with a ceramic wear-resistant coating. It is equipped with an encoder to provide real-time feedback on the opening and closing degree. It is linked with the feeding rhythm of the pyrolysis furnace through a PLC. The valve body is equipped with a protective cover. In this design, fully welded pipes and a double-sealed structure prevent leakage of material debris and aerosols. A 300mm insulation layer maintains the material temperature, and an electric ball valve precisely controls the discharge rate. The flange connection with the feed inlet of the pyrolysis furnace achieves seamless integration, ensuring the closed nature of the pretreatment-pyrolysis process and preventing material transport interruptions or over-discharge. This enhances the safety and continuity of the overall process and meets the full-chain management requirements for the harmless treatment of medical waste.

[0039] In a preferred embodiment, such as Figure 2 As shown, the ultraviolet sterilization module 610 includes ultraviolet lamps 620, which are evenly distributed circumferentially along the inner wall of the enclosed housing 100. The ultraviolet lamps 620 are bolted to the inner wall of the enclosed housing 100 based on strip-shaped fixing seats, which are located directly below the outlet of the feeding assembly 410.

[0040] Understandably, the UV lamps 620 of the UV sterilization module 610 are low-pressure mercury lamps with a wavelength of 254nm, and 3-6 lamps are evenly distributed around the inner wall of the enclosed housing 100, with a spacing of 50-80mm between adjacent lamps, to ensure coverage of the material path falling from the outlet of the feeding component 410; the lamps are covered by quartz glass sleeves, and the two ends of the sleeves are sealed to the strip-shaped fixing seat based on silicone sealing rings; the fixing seat is made of 304 stainless steel and is fixed to the inner wall of the housing based on 4 sets of M8 stainless steel anti-loosening bolts. The seat is located 100-150mm directly below the outlet of the feeding component 410, and the surface of the fixing seat is sprayed with a high-temperature resistant insulating coating. In this design, 254nm wavelength ultraviolet light can destroy pathogen DNA. Combined with multiple evenly distributed lamps, the instantaneous sterilization rate of falling materials reaches over 99%. Quartz sleeves and silicone seals prevent lamp contamination by material debris, extending service life by over 30%. Anti-loosening bolts and insulating coatings ensure stable installation and electrical safety under vibration. The fixed base position is precisely matched to the material path, avoiding sterilization blind spots. This design blocks the pathogen transmission chain from the pretreatment source, significantly reducing the risk of cross-contamination and meeting the biosafety requirements for medical waste treatment.

[0041] The working principle of the above embodiments is as follows: When the device is working, medical waste is fed into the feed hopper 420. The sealing gate 430 adjusts its opening and closing degree according to the load of the subsequent modules to control the feed amount while maintaining a closed system. During the material falling, the ultraviolet lamp 620 directly below the outlet of the feed assembly 410 instantaneously sterilizes it. Subsequently, the material enters the crushing module 110. The first drive motor 120 drives the rotating shaft 130 and the crushing blade 140 to rotate at high speed to crush the material into 5-10mm particles. The inclined bottom plate 150 guides the crushed material through the sealed channel into the dewatering module 210. The dewatering module 210... In section 10, the heating plate 220 increases the material contact area based on the textured surface 240, and the screw conveyor 310 compresses and dehydrates the material simultaneously during material transport. The generated condensate flows through the water receiving plate 230 and short pipe into the liquid collection tank 200 before being discharged. The anti-stick coating 250 prevents material adhesion. The negative pressure port 400 at the top of the closed shell 100 maintains a slight negative pressure of -5kPa to -10kPa to prevent aerosol leakage. Finally, the dehydrated material is discharged through the discharge pipe 520 and the sealing valve 530, completing the integrated closed pretreatment of "feeding-sterilization-pulverization-dehydration-discharge" to meet the requirements of pyrolysis feeding.

[0042] 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 closed pulverizing device for pyrolysis of medical waste, characterized in that, include: Enclosed housing, feeding assembly, crushing module, dewatering module, ultraviolet sterilization module, and discharge assembly; The feeding assembly, crushing module, dewatering module, and discharging assembly are sequentially arranged inside the closed housing along the material conveying direction, and the crushing module, dewatering module, feeding assembly, and discharging assembly are connected by a sealed channel; the ultraviolet sterilization module is arranged on the inner wall of the closed housing, and the ultraviolet sterilization module is arranged between the feeding assembly and the crushing module. The crushing module includes a first drive motor, a rotating shaft, and crushing blades. The first drive motor is fixedly mounted on the top surface of the closed housing. The rotating shaft passes through the top wall of the closed housing and is connected to the output end of the drive motor. The crushing blades are evenly distributed on the outer side of the rotating shaft. The dehydration module includes heating plates and a screw conveyor. The heating plates are symmetrically arranged on the inner wall of the closed housing, and the screw conveyor is arranged between the heating plates. Its output end is connected to the discharge assembly.

2. The enclosed pulverizing device for pyrolysis of medical waste according to claim 1, characterized in that, The crushing module is also provided with an inclined bottom plate, which is located at the bottom of the crushing module and welded to the inner wall of the crushing module. The inclined angle is 5º-10º.

3. The enclosed pulverizing device for pyrolysis of medical waste according to claim 1, characterized in that, The enclosed shell is also provided with a liquid collection tank, a heat insulation layer and a negative pressure interface. The liquid collection tank is located at the bottom of the dehydration module and is connected to an external wastewater treatment device via a drain pipe. The heat insulation layer is located on the inner wall of the enclosed shell.

4. The enclosed pulverizing device for pyrolysis of medical waste according to claim 3, characterized in that, The negative pressure interface is located at the top of the enclosed housing. The negative pressure interface is connected to an external vacuum pump via a pipe to maintain a micro-negative pressure environment inside the housing.

5. The enclosed pulverizing device for pyrolysis of medical waste according to claim 1, characterized in that, The heating plate is provided with a water receiving plate, a textured surface, and an anti-stick coating, and a heat insulation pad is provided at the connection between the heating plate and the enclosed shell.

6. The enclosed pulverizing device for pyrolysis of medical waste according to claim 5, characterized in that, The lowest end of the water receiving plate is provided with a drain hole, which is connected to the liquid collection tank via a short pipe.

7. The enclosed pulverizing device for pyrolysis of medical waste according to claim 1, characterized in that, The spiral conveyor includes a central shaft, a second drive motor, and spiral blades. The second drive motor is disposed on the outer side of the enclosed housing and is bolted to the outer side of the enclosed housing based on a bracket. The output end of the second drive motor is fixedly connected to the central shaft based on a coupling. The end of the central shaft away from the motor passes through a bearing seat in the inner wall of the enclosed housing. The bearing seat is fixedly welded to the enclosed housing. The spiral blades are welded and fixed to the central shaft, and the width of the spiral blades extends radially along the central shaft.

8. The enclosed pulverizing device for pyrolysis of medical waste according to claim 1, characterized in that, The feeding assembly includes a feeding hopper and a sealing gate. The feeding hopper extends through the top of the enclosed housing, and the sealing gate is located at the outlet of the feeding hopper to control the flow rate of material entering the enclosed housing and maintain a closed state.

9. The enclosed pulverizing device for pyrolysis of medical waste according to claim 1, characterized in that, The discharge assembly includes a discharge pipe and a sealing valve. One end of the discharge pipe is connected to the screw conveyor, and the other end passes through the enclosed shell and extends to the outside. The sealing valve is installed on the discharge pipe and is used to seal the connection with the feed port of the pyrolysis furnace.

10. A closed pulverizing device for pyrolysis of medical waste according to claim 1, characterized in that, The ultraviolet sterilization module includes ultraviolet lamps, which are evenly distributed circumferentially along the inner wall of the enclosed housing. The ultraviolet lamps are bolted to the inner wall of the enclosed housing based on strip-shaped fixing seats, which are located directly below the outlet of the feeding component.

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