CN114210712A

CN114210712A - Intelligent microwave disinfection treatment equipment for medical waste

Info

Publication number: CN114210712A
Application number: CN202111551150.8A
Authority: CN
Inventors: 李海军
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-03-22

Abstract

The invention provides intelligent microwave disinfection treatment equipment for medical waste, which belongs to the technical field of medical waste treatment and comprises a visual tunnel feeding system, a storage bin, a waste gas purification and discharge system, a heat recovery and cyclic utilization system, a quantitative feeding system, a closed crusher superposition crushing system, a quantitative material stirring and humidifying system, a microwave disinfection system, a spiral automatic induction slag discharging system and an air separation and screening system; the invention optimizes the prior steam microwave mixed disinfection process, removes the steam loss of the electric boiler on the whole equipment disposal, takes the microwave disinfection 10 tons of equipment as an example from the total power of the equipment: the energy-saving power supply saves the loss of 80-100 kilowatt electricity, saves 80-100 yuan of electricity charge per hour and saves energy.

Description

Intelligent microwave disinfection treatment equipment for medical waste

Technical Field

The invention relates to the technical field of medical waste treatment, in particular to intelligent microwave disinfection treatment equipment for medical waste.

Background

Medical waste is greatly different from common domestic waste, and contacts blood, flesh and the like of patients, according to medical detection reports of the national ministry of health, the medical waste has the characteristics of space pollution, acute infection, latent pollution and the like, the harmfulness of viruses and germs is dozens, hundreds or even thousands of times of that of the common domestic waste, if the medical waste is not properly treated, the serious pollution to the environment is caused, and the medical waste is likely to become the epidemic source of epidemic diseases.

The disposal of medical waste is a system engineering which includes the collection, transportation, incineration and secondary pollution treatment of medical waste, and since the fifties of the twentieth century, the disposal of medical waste has attracted much attention from all countries in the world and is listed in the "basele convention for controlling the border-crossing transfer and disposal of hazardous waste". In the aspect of relevant law and regulation construction, various international regulations and various aspects and links of reduction, classified collection, storage, transportation and treatment and disposal of medical waste have strict and definite regulations, and in the technical aspect, a great deal of manpower, material resources and financial resources are invested to carry out intensive research on the treatment and disposal of the medical waste.

Disclosure of Invention

In view of the above, the invention provides an intelligent microwave disinfection treatment device for medical waste, which not only has a good disinfection treatment effect, but also reduces energy consumption.

In order to solve the technical problem, the invention provides an intelligent microwave disinfection disposal device for medical waste, which comprises:

a visual tunnel feeding system for lifting and dumping medical waste into a silo;

a silo for temporarily storing medical waste;

the exhaust gas purification and discharge system is used for purifying and treating exhaust gas;

the heat recovery and cyclic utilization system is used for cyclically utilizing waste heat;

the quantitative feeding system is arranged below the stock bin and is used for quantitatively feeding;

the closed crusher superposition crushing system is used for secondary superposition crushing and is used for crushing medical waste;

the quantitative material stirring and humidifying system is used for wetting the crushed medical waste and quantitatively stirring the medical waste to the microwave disinfection system;

the microwave disinfection system kills bacteria in the medical waste by using microwave and dries the medical waste;

the spiral automatic induction slag discharging system is used for discharging disinfected medical waste particles;

and the wind separation and screening system is used for separating the crushed and disinfected medical waste so as to facilitate subsequent secondary utilization or incineration treatment.

Further, the visual tunnel feeding system comprises a lifting mechanism and an automatic overturning bracket which are arranged in the tunnel.

Further, fixed mounting has the hopper on the feed bin, and the hopper is connected with the door, and the door is equipped with high temperature resistant sealing strip, is equipped with the telescoping device who is used for adjusting the door and opens and shuts on the hopper, and hopper one side is equipped with pipeline filter equipment, and pipeline filter equipment passes through waste gas negative pressure induced air system and exhaust purification discharge system intercommunication, is equipped with radar material level induction system in the feed bin.

Further, the exhaust gas purification and emission system comprises an exhaust gas washing and purification system, an exhaust gas microwave UV light oxygen and an active carbon adsorption box for sterilization and purification.

Furthermore, the closed crusher superposition crushing system is hermetically connected with the quantitative feeding system and the quantitative material shifting and humidifying system, the closed crusher superposition crushing system is provided with a primary crushing mechanism and a secondary crushing mechanism, and a 5cm distance is reserved between the primary crushing mechanism and the secondary crushing mechanism.

Further, the material shifting plate of the quantitative material shifting and humidifying system is a microwave blocking shielding plate.

Furthermore, the microwave disinfection system comprises a first microwave disinfection heat source exchange system for sterilization, a spiral heat preservation conveying system for conveying materials and a second microwave disinfection drying evaporation bin for disinfection and drying.

The technical scheme of the invention has the following beneficial effects:

1. the traditional steam and microwave mixed disinfection process is optimized, the steam loss of an electric boiler is removed in the whole equipment disposal, and the total power of the equipment takes 10 tons of equipment for microwave disinfection as an example: the energy is saved by 80-100 kilowatt of electricity, the electricity charge is saved by 80-100 yuan per hour, and the energy is saved;

2. the equipment designs a secondary disinfection drying process, avoids the residue of steam condensate water, ensures that the discharged waste residue has no residue, is dried without pollution, and really achieves the harmless treatment process of microwave disinfection zero emission

3. The crushing and superposing system is designed with two combinations of coarse crushing and fine crushing, so that the bottleneck that a screen is blocked by a screen in one-level crushing is avoided, the risk that the screen is blocked by manual cleaning and bacteria propagation is avoided, the defect of abrasion of a blade of the crusher is optimized, the service life of the crusher is prolonged, and the disposal quantity of materials is optimized.

Drawings

FIG. 1 is a schematic structural diagram of an intelligent microwave disinfection and disposal device for medical waste according to the present invention;

FIG. 2 is a schematic diagram of the intelligent microwave disinfection and disposal device for medical waste according to the present invention;

fig. 3 is a reference diagram of the disinfection process flow of the intelligent microwave disinfection and disposal equipment for medical waste.

In the figure: 1. a visual tunnel feed system; 2. a storage bin; 3. an exhaust gas purification and discharge system; 4. a heat recovery and cyclic utilization system; 5. a closed crusher superposition crushing system; 6. a quantitative stirring and humidifying system; 7. a spiral heat-preservation conveying system; 8. a power distribution cabinet; 9. a first microwave disinfection heat source exchange system; 10. a microwave condenser; 11. the second microwave disinfection and drying evaporation bin; 12. a spiral automatic induction slag tapping system; 13. a kick-out device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 3 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

As shown in fig. 1-3: medical waste intelligent microwave disinfection disposes equipment, includes:

a visual tunnel feeding system 1 for lifting and dumping medical waste into a silo 2;

a silo 2 for temporarily storing medical waste;

an exhaust gas purification discharge system 3 for purifying and treating exhaust gas;

the heat recycling system 4 is used for recycling waste heat and comprises a heat preservation pipe and a vacuum circulating pump, one end of the heat preservation pipe is communicated with the spiral heat preservation conveying system 7, a specific connection position is arranged at a material connection port of the first microwave sterilization heat source exchange system 9, the other end of the heat preservation pipe is communicated with the second microwave sterilization drying evaporation bin 11, heat preservation materials are wound on the heat preservation pipe to reduce heat loss, the middle of the heat preservation pipe is also communicated with the waste gas purification and discharge system 3, when the heat preservation pipe works, a part of high-temperature waste gas is adsorbed and purified by a negative pressure fan of the waste gas purification and discharge system 3, the other part of high-temperature waste gas is adsorbed into the spiral heat preservation conveying system 7 by the vacuum circulating pump, and the high-temperature waste gas entering the first microwave sterilization heat source exchange system 9 is preheated, so that the utilization rate of heat is improved;

the quantitative feeding system is arranged below the stock bin 2 and used for quantitatively and uniformly feeding, the quantitative feeding system is not shown in the figure, the quantitative feeding system is a roller type feeding mechanism, and the roller is provided with material shifting teeth to assist in feeding;

the closed crusher is superposed with the crushing system 5, and two-stage superposed crushing is used for crushing medical waste;

the quantitative material stirring and humidifying system 6 is used for wetting the crushed medical waste and quantitatively stirring the medical waste to the microwave disinfection system;

a spiral automatic induction slag discharge system 12 for discharging the sterilized medical waste particles;

and the air separation and screening system (not shown in the figure) is used for screening the crushed medical waste, and screening the waste by utilizing different qualities of different waste materials so as to facilitate subsequent secondary utilization or incineration treatment.

The visual tunnel feeding system 1 comprises a lifting mechanism and an automatic overturning support which are arranged in a tunnel, the lifting mechanism and the automatic overturning support are both in the prior art, and the structures of the lifting mechanism and the automatic overturning support are not shown in detail.

Fixed mounting has the hopper on the feed bin 2, and the hopper is connected with the door, and the door is equipped with high temperature resistant sealing strip, is equipped with the telescoping device who is used for adjusting the door and opens and shuts on the hopper, and hopper one side is equipped with pipeline filter equipment, and pipeline filter equipment passes through waste gas negative pressure induced air system and 3 intercommunications of exhaust-gas purification discharge system, is equipped with radar material level induction system in the feed bin 2.

The exhaust gas purification and discharge system 3 comprises an exhaust gas washing and purification system, an exhaust gas microwave UV light oxygen and an active carbon adsorption box for sterilization and purification, and in addition, a negative pressure fan for providing negative pressure is further arranged.

The closed crusher superposed crushing system 5 is hermetically connected with the quantitative feeding system and the quantitative material shifting and humidifying system 6, the closed crusher superposed crushing system 5 is provided with a first-stage crushing mechanism and a second-stage crushing mechanism, and a 5cm distance is reserved between the first-stage crushing mechanism and the second-stage crushing mechanism.

The material-shifting plate of the quantitative material-shifting humidifying system 6 is a microwave blocking shielding plate.

In this embodiment, the microwave sterilization system includes a first microwave sterilization heat source exchange system 9 (8 sets of upper and lower spiral heat preservation conveying systems 7, the microwave generators are all fixed on the casing), which is composed of 16 sets of microwave generators, a spiral heat preservation conveying system 7 for conveying material, and a second microwave sterilization drying evaporation bin 11 (the evaporation bin is a vertical bin body, the microwave generators are respectively fixed on the side wall of the bin body) which is composed of 12 sets of microwave generators, and a material poking device 13 is further arranged in the second microwave sterilization drying evaporation bin 11 for poking medical waste to be heated uniformly.

A sterilization process based on medical waste intelligent microwave sterilization treatment equipment comprises the following steps:

(1) feed stage

An operator must wear protective working clothes, a mask, gloves and boots to pour the special turnover box for medical wastes into the closed lifting feeding bin through the automatic turnover support, and the bin door cover plate is opened; the batch was advanced (about 3.2m3 in volume) and the door closed to start the quantitative feeder. The radar material level response storage hopper suggestion material position and control crushing unit, storage hopper are equipped with waste gas negative pressure induced air system, ration and dial material humidification system, maintenance: hopper, crushing and disinfecting injection (sodium hypochlorite disinfectant) device.

According to the program equipment, the raw materials are crushed, disinfected, collected by waste gas, purified and discharged. During the automatic disinfection process, a plurality of sensors are effectively provided for the PLC to run programs. The radioactive substance detection sensing devices are arranged on two sides of the bin gate, so that radioactive substances mixed in medical waste can be picked out and sent to a public security department for treatment, and the pollutants are prevented from damaging equipment. And opening the feeding bin door, pouring medical waste into the bin, closing the bin door and starting crushing operation of the equipment. And one side of the disinfection cabin is provided with a draught fan for sealing waste gas collection and negative pressure fan performing 10000m cultivation to pump the waste gas to a waste gas cooling and exchanging system. Cooling, defogger, UV light oxygen catalytic purification and discharge.

The main pollution generated in the stage is turnover box cleaning wastewater, (the cleaning wastewater is purified, sterilized and reused by sewage treatment equipment); a small amount of waste gas generated at the microwave disinfection feed inlet is also pumped out through the hopper air collecting cover and enters the waste gas washing tower, the demister and the UV light oxygen catalytic purification and discharge.

(2) And (3) a crushing stage:

the crusher adopts a two-stage superposition special design and is hermetically connected with the conveying system and the quantitative feeding system, the main transmission shafts of the two crushers comprise two three-phase asynchronous motors and two speed reducers, the motors drive blades arranged on a main shaft of the crusher to work within a certain rotating speed under the control of the control system, and a feeding device at the rear part sends the bagged medical waste into a one-stage coarse crushing mixing system for crushing. The medical waste is crushed in a closed state, and the crushed medical waste enters a superposition secondary fine crushing system to be crushed by less than 3 cm.

(3) A disinfection phase

Principle of microwave sterilization technology

Microwave disinfection is the result of the combined action of microwave effect and biological effect, and specifically comprises the following steps: microwaves, when passing through a medium, are the effect produced by the thermal motion of molecules, and electromagnetic energy entering the biological system is converted into heat energy, which is expressed as a rise in temperature of the organism. Molecules of the medium vibrate and rub for billions of times per second to generate a large amount of heat, and simultaneously under the combined action of microwave heat effect and non-heat effect, proteins and physiological active substances in the body of the medium are changed, so that cell walls of microorganisms are damaged and die quickly. Plays a special role in sterilization which is not possessed by the conventional physical sterilization and is also a cause of bacterial death. Due to the metabolism in the cell, the protein is deformed and inactivated. The microwave sterilization is lower than the conventional method, and the sterilization temperature of the conventional method is 120-130 ℃ generally, while the microwave sterilization temperature is only 70-95 ℃ and the time is about 90-180 seconds.

The non-thermal effect of microwave energy is mainly that the polarized molecular structure is changed by a high-frequency electric field, so that proteins and physiologically active substances in a microwave organism are changed to lose vitality or die, and the non-thermal effect is specifically as follows: the oscillation frequency of the microwave is close to the natural frequency of organic molecules, and intracellular proteins, particularly amino acids, polypeptides and other components selectively absorb microwave energy, change the molecular structure, destroy the activity of biological enzymes, influence the metabolism of cells and achieve the effect of rapid and thorough sterilization.

The material enters a high-temperature spiral 12-set microwave 1.5KW disinfection bin, the first sterilization and humidification of the material is carried out by microwave irradiation and low-speed operation, and the humidified material is more beneficial to microwave heating and wave absorbing assistance. Microwave radiation sterilization is carried out for 45 to 60 minutes in the microwave radiation bin, and the sterilized materials enter the second vertical type sterilization bin 12 sets of microwaves to sterilize, maintain the temperature and dry the waste residues, so that bacteria are completely killed. And (4) the sterilized materials are conveyed to a winnowing screening machine along with the induction starting screw to be screened, recycled and reused. And conveying the waste residue collection box by the screened waste residue, and filtering, sterilizing and deodorizing the waste gas of the material. The sterilized materials have the following treatment effects: log kill for propagules bacteria, fungi, lipophilic/hydrophilic viruses, parasites and mycobacteria 6; log kill value 4 for bacillus subtilis dark-colored spruce (b.subtilisa tcc 9372). The microwave disinfection treatment process and operation meet the requirements of HJ/T229-2021. The microwave leakage rate is as follows: at a distance of 5cm from the device, the microwave power is less than or equal to 5mW/cm2, (2450 MHz) and the microwave power is less than or equal to 1mW/cm2 (915 MHz). The equipment box body is provided with a plurality of microwave leakage detecting instruments and alarm devices, so that the damage of microwave leakage to a human body is avoided.

Technical characteristics of microwave disinfection

Firstly, in the microwave field, the cell structure is destroyed, the material balance inside and outside the cell is destroyed, the cell death is caused, and the disinfection effect can reach 99.999 percent

Secondly, the disinfection time is short, the speed is fast, the penetration ability is strong, the temperature is uniform inside and outside, the energy is saved, and the disinfection effect is good.

The microwave and the material are humidified and combined to make the disinfection effect more efficient.

The microwave disinfection technology does not produce dioxin and malodorous gas and does not discharge waste water.

(4) Conveying phase

After the waste is crushed by the crusher, the rotating speed of a motor of a screw conveying system is controlled by an automatic control system, the crushed material slowly passes through a disinfection and heating area under the control of a computer control system, after microwave disinfection and deodorization are completed, the material enters a screening system and a storage sealing hopper through conveying, the waste enters a dump truck through the sealing hopper, and then the waste enters landfill and a garbage power plant for incineration power generation.

And in the waste conveying stage, the equipment runs in a fully closed mode, and a small amount of high-temperature waste gas possibly generated at a discharge port in the stage is pumped to a waste gas washing tower through a tail gas collection hood collection bin to be subjected to UV photo-oxygen catalytic purification and discharge.

(5) Heat source recovery system

The tail end heat source is pumped to the feeding inlet of the first-stage disinfection bin to assist the temperature rise of the material through the circulation of the vacuum pump in the first-stage disinfection bin and the second-stage disinfection bin, so that the loss of microwave irradiation temperature rise is reduced. And the energy is saved for the power loss of the equipment, thereby saving economic and social benefits.

(6) Exhaust gas purification system

The waste gas purification system adopts a draught fan process of carrying out catalytic purification on 150m air volume by using a square cyclone tower and UV light oxygen. The waste gas exchange system adopts a liquid absorption method to effectively treat organic waste gas generated by the feeding bin opening of the crusher and crushed materials, can effectively remove hydrogen chloride, hydrogen sulfide gas, ammonia gas, formalin and the like, and can filter dust in the waste gas. The photo-oxygen catalytic purification is to utilize molecular chains of bacteria to destroy nucleic acid of the bacteria, then carry out oxidation reaction through microwave VU, irradiate waste gas with UV light beams to crack the molecular chain structure of industrial waste gas, so that the molecular chains of organic or inorganic high-molecular malodorous compounds are changed into low-molecular compounds, such as CO2, H2O and the like, under the irradiation of high-energy ultraviolet light speed. Utilize high energy high ozone UV ultraviolet ray beam to decompose the oxygen molecule in the air and produce free oxygen, active oxygen, because of the unbalanced positive and negative electron that free oxygen carried so need combine with the oxygen molecule, have extremely strong oxidation to the organic matter, eliminate original harmful gas and other pungent peculiar smell. So as to convert organic matters into inorganic matters and achieve the aim of purifying and killing bacteria. The tail gas emission reaches the secondary emission standard of national industrial emission standard GB16297-1996, Integrated emission Standard of atmospheric pollutants.

The working method (or working principle) of the invention is as follows:

the intelligent microwave disinfection treatment equipment for medical waste is intelligent integrated equipment, and the equipment is programmed, controlled and set by a touch screen. The remote monitoring operation of a mobile phone and a computer can be realized, the detection and disposal data can be uploaded, and the disinfection disposal measures of the equipment can be better managed. The automatic feeding device is connected with a power distribution cabinet, a material box containing medical waste is poured into the closed lifting feeding bin through the automatic overturning bracket by a manual control device (the automatic feeding can be selected according to the treatment amount), and a bin door cover plate is opened; the bin gate is provided with a high-temperature-resistant sealing strip, so that the overflow of sealing waste gas is realized. One side of the hopper is provided with a pipeline filtering device, and waste gas is introduced into a waste gas washing and purifying system through a negative pressure fan and is discharged to a waste gas microwave UV light oxygen and activated carbon adsorption box for sterilization and purification. Medical waste is subjected to material feeding prompt controlled by a radar sensing material meter, a quantitative feeding system controls quantitative feeding according to 2 current signals of a two-stage superposition YK-80 crusher, the two-stage superposition crusher (two groups of crushers form coarse crushing and fine crushing, a 5CM distance is reserved in the middle of the two groups of crushers, so that materials after the first-stage crushing can smoothly enter the second-stage crushing, the defect that a screen is blocked by a screen added during one-time crushing is overcome, the risk of bacterial propagation during manual cleaning of the screen is avoided, and the two groups of crushers are in a sealing connection structure and are also called a sealing crusher superposition crushing system). The crushed materials are stirred by a microwave shielding plate quantitative stirring and humidifying system to enter a first microwave sterilization (microwave generator 1.5 KW/16 set, frequency: 2450MHz) spiral control cabin, the temperature is increased by 95-135 degrees along with the start of the work of a microwave generator series (microwave condenser), the sterilization rate is 99.999 percent (the rotating speed of the temperature control spiral) to start spiral sterilization propulsion, and the waste residues after the first sterilization are conveyed to a second vacuum microwave sterilization and drying evaporation cabin (microwave generator 1.5 KW/12 set, frequency: 2450 MHz). (vacuum microwave sterilization stoving evaporation cabin top is equipped with the vacuum circulating pump and carries out the negative pressure heat source and exchange and carry out the supplementary intensification of material to first microwave sterilization storehouse) through stirring and enter into microwave baffling board ration unloading cabin (the cabin of unloading is equipped with the observation maintenance window) waste residue after the secondary disinfection stoving gets into spiral auto-induction slag tapping system and carries winnowing machine (wind selection screening system) and sieve, medical waste residue after the screening passes through screening plastics, glass, the metal can reach the economic benefits of reutilization by industrial processing, non-woven fabrics, gauze, miscellaneous rubbish such as quilt clothes can send to the msw incineration power plant and handle.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. Medical waste intelligent microwave disinfection treatment facility, its characterized in that includes:

a visual tunnel feeding system (1) for lifting and dumping medical waste into a silo (2);

a silo (2) for temporarily storing medical waste;

an exhaust gas purification discharge system (3) for purifying the exhaust gas;

the heat recovery and cyclic utilization system (4) is used for cyclically utilizing waste heat;

the quantitative feeding system is arranged below the stock bin (2) and is used for quantitatively feeding;

a closed crusher superposition crushing system (5) for secondary superposition crushing for crushing medical waste;

the quantitative stirring and humidifying system (6) is used for wetting the broken medical waste and quantitatively stirring the medical waste to the microwave disinfection system;

a spiral automatic induction slag discharge system (12) for discharging the disinfected medical waste particles;

and the air separation and screening system is used for screening the crushed medical waste so as to facilitate subsequent secondary utilization or incineration treatment.

2. The medical waste intelligent microwave disinfection disposal device of claim 1, wherein: the visual tunnel feeding system (1) comprises a lifting mechanism and an automatic overturning bracket which are arranged in a tunnel.

3. The medical waste intelligent microwave disinfection disposal device of claim 1, wherein: fixed mounting has the hopper on feed bin (2), and the hopper is connected with the door, and the door is equipped with high temperature resistant sealing strip, is equipped with the telescoping device who is used for adjusting the door and opens and shuts on the hopper, and hopper one side is equipped with pipeline filter equipment, and pipeline filter equipment passes through waste gas negative pressure induced air system and exhaust purification discharge system (3) intercommunication, is equipped with radar material level induction system in feed bin (2).

4. The medical waste intelligent microwave disinfection disposal device of claim 1, wherein: the waste gas purification and discharge system (3) comprises a waste gas washing and purification system, a waste gas microwave UV photo-oxygen and activated carbon adsorption box for sterilization and purification.

5. The medical waste intelligent microwave disinfection disposal device of claim 1, wherein: the closed crusher superposition crushing system (5) is hermetically connected with the quantitative feeding system and the quantitative material shifting and humidifying system (6), the closed crusher superposition crushing system (5) is provided with a primary crushing mechanism and a secondary crushing mechanism, and a 5cm distance is reserved between the primary crushing mechanism and the secondary crushing mechanism.

6. The medical waste intelligent microwave disinfection disposal device of claim 1, wherein: and the material shifting plate of the quantitative material shifting and humidifying system (6) is a microwave blocking and shielding plate.

7. The medical waste intelligent microwave disinfection disposal device of claim 1, wherein: the microwave disinfection system comprises a first microwave disinfection heat source exchange system (9) for sterilization, a spiral heat preservation conveying system (7) for conveying materials and a second microwave disinfection drying evaporation bin (11) for disinfection and drying.