CN108144098A - A kind of Biohazard Waste multistage disinfection system - Google Patents

Abstract

The invention belongs to the technical field of medical waste treatment, and specifically relates to a multi-stage sterilization system for medical waste, which includes a shell, a crushing unit, a high-temperature sterilization unit, a drying unit, a cooling unit and an ozone sterilizing box. The shell is Rectangular, with a feeding port installed above the shell; the crushing unit is located inside the shell, and the crushing unit is used to crush medical waste; the high-temperature sterilization unit is located below the crushing unit, and the high-temperature sterilization unit is used for sterilization; the drying unit is located in the shell At the bottom left of the body, the drying unit is used to dry the waste; the cooling unit is located below the drying unit; the ozone sterilization box is located on the left side of the drying unit. The present invention is mainly used for sterilizing medical wastes through the combination of high-temperature steam and ozone, which has good disinfection and sterilization effects, uses drying and cooling units to dry and cool wastes, reduces waiting time, and recycles ozone ,Energy saving and environmental protection.

Description

A multi-stage sterilization system for medical waste

technical field

The invention belongs to the technical field of medical waste treatment, in particular to a multi-stage sterilization system for medical waste.

Background technique

Medical waste refers to directly or indirectly infectious, toxic and other hazardous waste produced by medical institutions in medical treatment, prevention, health care and other related activities, specifically including infectious, pathological, injurious, pharmaceutical and chemical wastes. waste. These wastes contain a large number of bacterial viruses, and have certain characteristics of space pollution, acute virus infection, and latent infection. If management is not strengthened, discarded at will, and allowed to mix with domestic garbage and disperse into people's living environment, it will pollute Air, water, land, animals and plants cause the spread of diseases and seriously endanger the physical and mental health of the people.

With the development of society, the awareness of environmental protection is gradually increasing. Today, there are many technologies that can be used for the treatment of medical waste. At present, the treatment methods of medical waste mainly include: incineration treatment, steam treatment and chemical disinfection of disinfectants, followed by Microwave, plasma vacuum carbonization, etc. The former has secondary pollution to the environment, especially groundwater and air, while the latter has less secondary pollution, but it is rarely used because of its high cost.

The strong oxidizing property of ozone is recognized, and it can kill almost all viruses and germs. Its oxidizing property is second only to fluorine, which has the strongest oxidizing property. The scorching water vapor also has the effect of cleaning and disinfecting. When the two are used alone, the effect is not good. . At the same time, when preparing ozone, excessive air humidity will interfere with the discharge of the ozone generator, resulting in unstable ozone concentration, and the ozone generator is easily damaged. When there is a lot of dust in the air, it will easily concentrate on the electrode plate of the ozone generator. The production of ozone is greatly reduced, and after the disinfection is completed, the ozone is often discharged directly after the tail gas treatment, resulting in a large waste of resources and increased disinfection costs. In addition, it is difficult to achieve a better disinfection effect with a single treatment method.

In view of this, a multi-stage sterilization system for medical waste according to the present invention uses dual methods for sterilization, and the sterilization is relatively thorough. It can effectively crush the gauze that often appears in medical waste, and add a drying unit and a cooling system. Unit, enhance the bactericidal effect of ozone.

Contents of the invention

In order to make up for the deficiencies of the prior art, the present invention proposes a multi-stage sterilization system for medical waste. The effect of bacteria is good, and the drying and cooling unit is used to dry and cool the waste, reducing waiting time, ozone recycling, energy saving and environmental protection.

The technical solution adopted by the present invention to solve the technical problem is: a multi-stage sterilization system for medical waste according to the present invention, including a housing, a crushing unit, a high-temperature sterilization unit, a drying unit, a cooling unit and an ozone sterilizer. The bacteria box, the shell is rectangular, and a feeding port is installed above the shell; the crushing unit is located inside the shell, and the crushing unit is used to crush medical waste; the high-temperature sterilization unit is located in the crushing unit Below, the high-temperature sterilization unit is used for sterilization; the drying unit is located at the lower left of the casing, and the drying unit is used to dry waste; the cooling unit is located below the drying unit; the ozone sterilization box Located to the left of the drying unit. When working, medical waste is added into the housing from the feeding port, the crushing unit crushes the medical waste, and the high-temperature sterilization unit sterilizes the crushed medical waste at high temperature. After preliminary sterilization, the medical waste enters the Go to the drying unit for drying, and then enter the cooling unit for cooling, which is convenient for the next step of sterilization. The dried and cooled waste is passed into ozone, and the ozone sterilization box generates ozone to sterilize the waste again.

Preferably, the crushing unit includes motor 1, gear 1, gear 2, rotating shaft 1, rotating shaft 2 and a crushing rod, the motor 1 is installed on the outside of the housing through a pole, and the gear 1 and The motor shaft of the first motor is connected in rotation; the second gear is meshed with the first gear; the first rotating shaft and the first gear are fixedly installed; the second rotating shaft and the second gear are fixedly installed; Axis one and rotation axis two. During work, once the motor starts, it drives gear one to rotate, gear one meshes with gear two, gear one and gear two drive rotation shaft one and rotation shaft two to rotate, and the crushing rod cuts and pulverizes waste.

Preferably, the first rotating shaft and the second rotating shaft are provided with serrated protrusions, which are convenient for winding gauze and needle tubes in the waste onto the rotating shaft, and comminuting with the crushing blade.

Preferably, the crushing rod includes a crushing blade and a spring, the crushing rod is provided with a groove, and the spring is located in the groove of the crushing rod; one end of the crushing blade is fixedly connected to the spring, and the side of the crushing blade is provided with Jagged bumps. When working, the crushing blade cuts and crushes the waste, and the crushing blade can stretch part into the groove of the crushing rod to avoid damage to the crushing blade.

Preferably, the high temperature sterilization unit includes a rotating plate, a hollow rotating shaft 1, a helical blade, a bevel gear 1, a bevel gear 2, a rotating shaft 3, a rotating shaft 4, a cross bar, a motor 2, a hollow rotating shaft 2 and a hollow Stirring rod, the rotating plate is installed on the hollow rotating shaft, and the rotating plate is provided with a hollow chamber; the hollow rotating shaft is installed on the housing, and the hollow rotating shaft is provided with a round hole, and the hollow rotating shaft One is connected to the high-temperature steam pipe; the spiral blade is located in the hollow chamber of the rotating plate; the third rotating shaft is fixedly installed with the spiral blade; the first bevel gear is fixedly connected to the third rotating shaft; the bevel gear The second meshes with the bevel gear one; the four rotating shafts are fixedly connected with the two bevel gears; the cross bar is installed on the four rotating shafts; the second motor is installed under the housing; the hollow rotating shaft The second is installed on the second motor, the second hollow rotating shaft passes through the second motor and is connected to the high-temperature steam pipe; the hollow stirring rod is installed on the first hollow rotating shaft, and the hollow stirring rod communicates with the hollow chamber of the second hollow rotating shaft, The stirring rod is provided with a through hole. When working, the waste on both sides falls into the two sides of the shell for sterilization. The hollow rotating shaft drives the rotating plate to rotate. Steam, high-temperature steam enters the hollow chamber of the rotating plate from the hole of the hollow rotating shaft 1, and the high-temperature steam drives the spiral blade to rotate, and cooperates with the transmission of the rotating shaft 3, rotating shaft 4, bevel gear 1 and bevel gear 2, and the cross bar The rotation will spread the waste falling on the rotating plate evenly, and the high-temperature steam will emerge from the through hole of the rotating plate to sterilize the waste; the waste in the middle will fall into the middle of the shell for sterilization, and the second motor will drive the hollow The rotating shaft 2 and the hollow stirring rod rotate, high-temperature steam enters through the hollow rotating shaft 2, and emerges from the through hole of the hollow stirring rod to sterilize waste at high temperature.

Preferably, the drying unit includes a box body, a motor three, a rotating shaft five, a stirring plate and a filter screen one, the box body is located at the lower left side of the casing, and a spiral groove is arranged in the box body, and high temperature steam is used for The waste is heated and dried, the upper end of the box is provided with a groove, and the box is equipped with a guide plate; the motor three is located at the back of the box, and the motor three uses high-temperature steam as a power source; the rotating shaft five passes through the belt It is connected with the motor three; the stirring plate is installed on the rotating shaft five; one and two ends of the filter screen are installed in the groove of the box body. When working, the motor three uses high-temperature steam as the power source, the motor three drives the rotating shaft five to rotate through the belt, the stirring plate rolls the falling medical waste, the filter screen one vibrates to make the waste fall more evenly, and the spiral in the box The high-temperature steam fed into the tank heats and dries the waste to speed up the drying efficiency.

Preferably, the cooling unit includes a second filter, a support rod, a third filter, a return spring and a vibrating motor, the second filter is installed on the support rod through a hanging rope; the support rod is installed on the filter Third, the upper end of the support rod is fixedly connected to the filter screen one; the filter screen three is installed on the lower part of the box body through a return spring; the vibration motor is installed on the lower surface of the filter screen three. When working, the vibrating motor vibrates to drive the filter screen three and the support bar to vibrate, and the support bar drives the filter screen two to vibrate, and at the same time, the air is passed into the bottom for cooling.

The beneficial effects of the present invention are:

1. A multi-stage sterilization system for medical waste according to the present invention. The crushing unit, the high-temperature sterilization unit and the ozone sterilization box described in the present invention cooperate with each other to sterilize the waste in a dual manner. In addition, the waste is cooled and dried before ozone sterilization, reducing the time of natural drying and cooling, improving work efficiency, improving the sterilization effect of ozone, and reducing the unstable decomposition of ozone at high temperature.

2. The first rotating shaft and the second rotating shaft included in the pulverizing unit of the present invention are provided with protrusions, and the gauze and other easily entangled wastes in the waste are wound on the first rotating shaft and the second rotating shaft, and the crushing blade is used Crush the entangled gauze, etc., to improve the crushing effect of the gauze.

3. The high-temperature sterilization unit of the present invention uses high-temperature steam as the power source of the motor, and at the same time, the spiral blades in the rotating plate use high-temperature steam as the driving force to spread the waste falling on the rotating plate evenly, so that the sterilization effect is improved. Better, more fully sterilized.

4. The drying unit of the present invention uses high-temperature steam as a power source, and at the same time uses the spiral groove inside the box to allow high-temperature steam to pass through the spiral groove, and uses high-temperature steam to dry waste, reducing energy use and saving energy. Use the stirring plate to flip the waste, speed up the drying effect, and save time and cost.

5. The cooling unit of the present invention utilizes the mutual cooperation of the vibration motor, the support rod and the filter screen to make the waste vibrate on the filter screen, and the air is passed in to accelerate the cooling efficiency.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a sectional view of the present invention;

Figure 2 is an enlarged view of A in Figure 1;

Figure 3 is an enlarged view at B in Figure 1;

Figure 4 is an enlarged view at C in Figure 1;

Figure 5 is an enlarged view at D in Figure 1;

Fig. 6 is the sectional view of stirring plate of the present invention;

Among the figure: housing 1, crushing unit 2, motor one 21, gear one 22, gear two 23, rotating shaft one 24, rotating shaft two 25, crushing rod 26, protrusion 27, crushing blade 28, spring 29, high temperature extinguishing Bacteria unit 3, rotating plate 31, hollow rotating shaft 1 32, helical blade 33, bevel gear 1 34, bevel gear 2 35, rotating shaft 3 36, rotating shaft 4 37, cross bar 38, motor 2 39, hollow rotating shaft 2 310, hollow stirring rod 311, drying unit 4, box body 41, rotating shaft 5 42, stirring plate 43, filter 1 44, cooling unit 5, filter 2 51, support rod 52, filter 3 53, return spring 54 , vibration motor 55, ozone sterilization box 6.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

As shown in Figures 1 to 4, a multi-stage sterilization system for medical waste according to the present invention includes a housing 1, a crushing unit 2, a high-temperature sterilization unit 3, a drying unit 4, a cooling unit 5 and an ozone sterilizer. The bacteria box 6, the housing 1 is rectangular, and a feeding port is installed above the housing 1; the pulverizing unit 2 is located inside the housing 1, and the pulverizing unit 2 is used to pulverize medical waste; the high temperature The sterilization unit 3 is located below the crushing unit 2, and the high-temperature sterilization unit 3 is used for sterilization; the drying unit 4 is located at the lower left of the housing 1, and the drying unit 4 is used for drying waste; the cooling unit 5 is located below the drying unit 4; the ozone sterilization box 6 is located on the left side of the drying unit 4. When working, medical waste is added into the housing 1 from the feeding port, the crushing unit 2 crushes the medical waste, and the high-temperature sterilization unit 3 sterilizes the crushed medical waste at high temperature. After preliminary sterilization, the medical The waste enters the drying unit 4 for drying, and then enters the cooling unit 5 for cooling, which is convenient for sterilization in the next step. The dried and cooled waste is fed into ozone, and the ozone sterilizer 5 generates ozone to sterilize the waste again.

As an embodiment of the present invention, the crushing unit 2 includes a motor one 21, a gear one 22, a gear two 23, a rotating shaft 24, a rotating shaft two 25 and a crushing rod 26, and the motor one 21 passes through the The rod is installed on the outside of the housing 1, the first gear 22 is rotationally connected to the motor shaft of the first motor 21; the second gear 23 is meshed with the first gear 22; the first rotating shaft 24 and the first gear 22 are fixedly installed ; The second rotating shaft 25 and the second gear 23 are fixedly installed; the crushing lever 26 is installed on the first rotating shaft 24 and the second rotating shaft 25 . During work, motor one 21 starts, drives gear one 22 to rotate, and gear one 22 engages gear two 23, and gear one 22 and gear two 23 drive rotating shaft one 24 and rotating shaft two 25 to rotate, and crushing rod 26 cuts and pulverizes waste .

As an embodiment of the present invention, the first rotating shaft 24 and the second rotating shaft 25 are provided with serrated protrusions 27, and the protrusions 27 are convenient for winding gauze and needle tubes in the waste onto the rotating shafts. , Cooperate with the pulverizing blade 28 to pulverize.

As an embodiment of the present invention, the crushing rod 26 includes a crushing blade 28 and a spring 29, the crushing rod 26 is provided with a groove, and the spring 29 is located in the groove of the crushing rod 26; the crushing blade One end of 28 is fixedly connected with spring 29, and the side of crushing blade 28 is provided with serrated protrusion 27. During work, the pulverizing blade 28 cuts and pulverizes the waste, and the pulverizing blade 28 can telescopically enter the groove of the pulverizing rod 26 to prevent the pulverizing blade 28 from being damaged.

As an embodiment of the present invention, the high temperature sterilization unit 3 includes a rotating plate 31, a hollow rotating shaft 32, a helical blade 33, a bevel gear 1 34, a bevel gear 2 35, a rotating shaft 3 36, and a rotating shaft 4 37, cross bar 38, motor two 39, hollow rotating shaft two 310 and hollow stirring rod 311, described rotating plate 31 is installed on the hollow rotating shaft one 32, and rotating plate 31 is provided with hollow chamber; Described hollow rotating The first shaft 32 is installed on the housing 1, and the hollow rotating shaft 32 is provided with a round hole, and the hollow rotating shaft 32 is connected with the high-temperature steam pipe; the spiral blade 33 is located in the hollow chamber of the rotating plate 31; Rotating shaft three 36 and screw blade 33 are fixedly installed; Described bevel gear one 34 is fixedly connected with rotating shaft three 36; Described bevel gear two 35 meshes with bevel gear one 34; Described rotating shaft four 37 and bevel gear The second 35 is fixedly connected; the cross bar 38 is installed on the rotating shaft 4 37; the second motor 39 is installed under the housing 1; the hollow rotating shaft 2 310 is installed on the motor 2 39, and rotates hollowly The shaft two 310 passes through the motor two 39 and is connected to the high-temperature steam pipe; the hollow stirring rod 311 is installed on the hollow rotating shaft one 32, and the hollow stirring rod 311 communicates with the hollow chamber of the hollow rotating shaft two 310, and the hollow stirring rod 311 There are through holes on it. During work, the waste on both sides falls into the both sides of the housing 1 for sterilization, and the hollow rotating shaft 32 drives the rotating plate 31 to rotate. When the hollow rotating plate 31 rotates to the vertical state with the side wall of the housing 1, the hollow Rotating shaft one 32 feeds high-temperature steam, and high-temperature steam enters the hollow chamber of rotating plate 31 from the circular hole of hollow rotating shaft one 32, and high-temperature steam pushes screw blade 33 to rotate, cooperates rotating shaft three 36, rotating shaft four 37, With the transmission of bevel gear 1 34 and bevel gear 2 35, the rotation of cross bar 38 will spread the waste evenly on the rotating plate 31, and high-temperature steam will emerge from the through hole of rotating plate 31 to sterilize the waste; The waste falls into the middle of the housing 1 for sterilization, the motor 2 39 drives the hollow rotating shaft 2 310 and the hollow stirring rod 311 to rotate, high-temperature steam enters through the hollow rotating shaft 2 310, and emerges from the through hole of the hollow stirring rod 311 out, the waste is sterilized at high temperature.

As an embodiment of the present invention, the drying unit 4 includes a box body 41, a motor three, a rotating shaft five 42, a stirring plate 43 and a filter screen one 44, and the box body 41 is located at the lower left of the housing 1 , the box body 41 is provided with a spiral groove, using high-temperature steam to heat and dry the waste, the upper end of the box body 41 is provided with a groove, and the box body 41 is equipped with a guide plate; The motor three uses high-temperature steam as a power source; the rotating shaft five 42 is connected to the motor three through a belt; the stirring plate 43 is installed on the rotating shaft five 42; the two ends of the filter screen one 44 are installed on the box body 41 in the groove. When working, the motor three uses high-temperature steam as the power source, the motor three drives the rotating shaft five 42 to rotate through the belt, the stirring plate 43 rolls the falling medical waste, the filter screen one 44 vibrates to make the waste fall more evenly, and the box body The high-temperature steam fed into the spiral groove in 41 heats and dries the waste to speed up the drying efficiency.

As an embodiment of the present invention, the cooling unit 5 includes a second filter 51, a support rod 52, a third filter 53, a return spring 54 and a vibrating motor 55, and the second filter 51 is installed on the On the support rod 52; the support rod 52 is installed on the filter screen three 53, and the support rod 52 upper end is fixedly connected with the filter screen one 44; the described filter screen three 53 is installed on the bottom of the casing by a return spring 54; The vibration motor 55 described above is installed on the lower surface of the filter screen three 53. During work, the vibrating motor 55 vibrates, drives the filter screen three 53 and the support bar 52 to vibrate, and the support bar 52 drives the filter screen two 51 to vibrate, and simultaneously the lower part passes into the air for cooling.

When working, medical waste is added into the housing 1 from the feeding port, the crushing unit 2 crushes the medical waste, the motor one 21 is started, and the gear one 22 is driven to rotate, the gear one 22 meshes with the gear two 23, the gear one 22 and the gear The second 23 drives the rotating shaft 1 24 and the rotating shaft 2 25 to rotate, and the crushing rod 26 cuts and pulverizes the waste; the high-temperature sterilization unit 3 performs high-temperature sterilization on the crushed medical waste, and the waste on both sides falls into the shell Both sides of the body 1 are sterilized, and the hollow rotating shaft 32 drives the rotating plate 31 to rotate. When the hollow rotating plate 31 rotates to a vertical state with the side wall of the housing 1, the hollow rotating shaft 32 feeds high-temperature steam, and the high-temperature steam flows from the The round hole of the hollow rotating shaft 32 enters the hollow chamber of the rotating plate 31, and the high-temperature steam pushes the spiral blade 33 to rotate, and cooperates with the transmission of the rotating shaft 3 36, the rotating shaft 4 37, the bevel gear 1 34 and the bevel gear 2 35, The rotation of the crossbar 38 spreads the waste falling on the rotating plate 31 evenly, and high-temperature steam emerges from the through hole of the rotating plate 31 to sterilize the waste; the waste in the middle falls into the middle of the housing 1 for sterilization. Bacteria, motor 2 39 drives hollow rotating shaft 2 310 and hollow stirring rod 311 to rotate, high-temperature steam enters through hollow rotating shaft 2 310, emerges from the through hole of hollow stirring rod 311, waste is carried out high-temperature sterilization; After preliminary After sterilization, the medical waste enters the drying unit 4 for drying. The motor 3 uses high-temperature steam as the power source. The motor 3 drives the rotating shaft 5 42 to rotate through the belt. The stirring plate 43 rolls the falling medical waste, and the filter screen 1 44 Vibration makes the waste fall more evenly, and the high-temperature steam passed into the spiral groove in the box body 41 heats and dries the waste to speed up the drying efficiency; the dried waste enters the cooling unit 5, and the vibrating motor 55 vibrates to drive Filter screen three 53 and support bar 52 vibrate, and support bar 52 drives filter screen two 51 vibrations, and simultaneously below feeds air and cools, and finally feeds ozone, and ozone sterilizer 5 produces ozone and waste is sterilized again.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. A multi-stage sterilization system for medical waste, characterized in that it includes a housing (1), a crushing unit (2), a high-temperature sterilization unit (3), a drying unit (4), a cooling unit (5) and Ozone sterilizer (6), described casing (1) is rectangular, and the top of casing (1) is equipped with feeding port; Described crushing unit (2) is positioned at the inside of casing (1), and crushing unit (2) used to crush medical waste; the high temperature sterilization unit (3) is located below the crushing unit (2), and the high temperature sterilization unit (3) is used for sterilization; the drying unit (4) is located in the shell The lower left side of the body (1), the drying unit (4) is used to dry waste; the cooling unit (5) is located below the drying unit (4); the ozone sterilization box (6) is located in the drying unit (4) to the left. 2. A multi-stage sterilization system for medical waste according to claim 1, characterized in that: the crushing unit (2) includes a motor one (21), a gear one (22), and a gear two (23) , rotating shaft one (24), rotating shaft two (25) and crushing rod (26), described motor one (21) is installed on the outside of housing (1) by pole; Described gear one (22) Rotately connect with the motor shaft of motor one (21); Described gear two (23) and gear one (22) mesh; Described rotating shaft one (24) and gear one (22) are fixedly installed; Described rotation Axle two (25) and gear two (23) are fixedly installed; Described pulverizing lever (26) is installed on rotating shaft one (24) and rotating shaft two (25). 3. A multi-stage sterilization system for medical waste according to claim 2, characterized in that: the first rotating shaft (24) and the second rotating shaft (25) are provided with serrated protrusions (27 ), the protrusion (27) is convenient for winding waste. 4. A multi-stage sterilization system for medical waste according to claim 2, characterized in that: the crushing rod (26) includes a crushing blade (28) and a spring (29), and the crushing rod ( 26) A groove is provided, and the spring (29) is located in the groove of the crushing rod (26); one end of the crushing blade (28) is fixedly connected to the spring (29), and the side of the crushing blade (28) is provided with a serrated protrusions (27). 5. A multi-stage sterilization system for medical waste according to claim 1, characterized in that: the high-temperature sterilization unit (3) includes a rotating plate (31), a hollow rotating shaft (32), a spiral Blade (33), bevel gear one (34), bevel gear two (35), rotating shaft three (36), rotating shaft four (37), cross bar (38), motor two (39), hollow rotating shaft two ( 310) and hollow stirring rod (311), described rotating plate (31) is installed on the hollow rotating shaft one (32), and rotating plate (31) is provided with hollow chamber; Described hollow rotating shaft one (32) Installed on the housing (1), the hollow rotating shaft one (32) is provided with a round hole, and the hollow rotating shaft one (32) is connected with the high-temperature steam pipe; the spiral blade (33) is located on the rotating plate (31) In the hollow chamber; the three (36) of the rotating shaft and the screw blade (33) are fixedly installed; the one (34) of the bevel gear and the three (36) of the bevel gear are fixedly connected; the two (35) of the bevel gear are Mesh with bevel gear one (34); described rotating shaft four (37) is fixedly connected with bevel gear two (35); described cross bar (38) is installed on the rotating shaft four (37); described motor The second (39) is installed under the housing (1); the second hollow rotating shaft (310) is installed on the second motor (39), and the second hollow rotating shaft (310) passes through the second motor (39) and the high-temperature steam The tubes are connected; the hollow stirring rod (311) is installed on the hollow rotating shaft one (32), the hollow stirring rod (311) communicates with the hollow chamber of the hollow rotating shaft two (310), and the hollow stirring rod (311) Through holes are provided. 6. A multi-stage sterilization system for medical waste according to claim 1, characterized in that: the drying unit (4) includes a box body (41), a motor three, a rotating shaft five (42), a stirring plate (43) and filter screen one (44), the box body (41) is located at the lower left side of the housing (1), and the box body (41) is provided with a spiral groove, and high-temperature steam is passed through the spiral groove to treat waste Carry out heating and drying, the upper end of casing (41) is provided with groove, and casing (41) is equipped with guide plate; Described motor three is positioned at casing (41) rear side, and motor three utilizes high-temperature steam as power source; The five rotating shafts (42) are connected to each other by a belt and the three motors; the stirring plate (43) is installed on the five rotating shafts (42); ) in the groove. 7. A multi-stage sterilization system for medical waste according to claim 6, characterized in that: the cooling unit (5) includes a second filter (51), a support rod (52), a third filter ( 53), back-moving spring (54) and vibration motor (55), described filter screen two (51) are installed on the support bar (52) by hanging rope; Described support bar (52) is installed in filter screen three ( 53), the upper end of the support rod (52) is fixedly connected to the filter screen one (44); the filter screen three (53) is installed on the bottom of the casing through the return spring (54); the vibration motor (55) Be installed on the lower surface of filter screen three (53). 8. A multi-stage sterilization system for medical waste according to claim 6, characterized in that: the stirring plate (43) is provided with a hollow chamber, and the stirring plate (43) is evenly provided with circular holes; Described rotating shaft five (42) is hollow shaft, offers circular hole on the rotating shaft five (42), and rotating shaft five (42) externally connects air suction pump.